EuroDoble is a forum for sharing best practices for managing European power stations and industrial sites with learning opportunities for power engineer involved with transmission and distribution, maintenance, protection or asset management.
SUNDAY, 20 OCTOBER 2019
MONDAY, 21 OCTOBER 2019
Opening Address & Keynote Speaker
Keynote: Responding to the Future Grid’s Challenges
Nuno Silva | Director of Technology | EFACEC
The electrical grids worldwide are being challenged in its operation and planning by the integration of large-scale intermittent renewable energy sources (either centralized or decentralized) and the electrification of the mobility of persons and goods. In this presentation we will review some of the solutions and technologies to address these challenges and subsequent opportunities.
Keynote: Power System with 100% Renewable Energy – The Long Wait…
Professor João Peças Lopes | Full Professor / Director of INESC TEC / IEEE Fellow | FEUP
Power system with 100% renewable energy: the long wait…The main technical challenges related with the planning and operation of the power system of the future, where generation will be fed from renewable generation (almost 100% penetration) will be presented and discussed.
Session 1: Circuit Breaker Timing and Travel Analysis
Steve Larson | Snohomish Public Utility District
Alex Salinas | Doble Engineering Co.
Circuit breaker timing and travel analysis are tools that can be used to determine the need for more extensive maintenance, such as re-building the circuit breaker mechanism. Testing results could also indicate if that circuit breaker was nearing end of its useful life. This presentation will explain why timing and travel analysis is important, review the basic concepts behind tests performed, then discuss the test equipment and transducers used for timing & travel analysis.
Big Data & Cyber Security Session: The Information Management Road Map to a Smarter Utility
Michael Covarrubias | Xtensible Solutions, a Doble Company
One of the major factors that causes grid modernization projects to fail is system integration. In order to successfully integrate systems, you must know what you are integrating and what that means to your utility. At the core of this is the data within the systems. Without proper understanding of your data, you will be unable to effectively leverage data to make good business decisions. You will have a maintenance nightmare that is more costly over time with little chance to produce useful analytics in a timely manner, if at all. From current research of clients and industry input, a utility spends about 80% of the analytic project doing data clean up and only 20% analysis. This presentation will discuss information management strategies that help utilities succeed in their modernization objectives.
Big Data & Cyber Security Session: Integrating Customer, Field and Sensor Data to Support Network Operations and Analytics
Alan McMorran | Open Grid Systems
Modern mobile devices are capable of running sophisticated, network-enabled applications exploiting a variety of sensors on a single low-cost piece of hardware. The electrical industry can benefit from these new platforms to crowd-source the gathering of network outage and damage information from customers, and provide engineers with access to large amounts of complex data in real-time whether they’re in the control room or out in the field. This presentation describes three projects Open Grid Systems has undertaken with a UK utility to deploy and integrate a customer smartphone application allowing them to submit damage and network outage reports in real-time; a mobile application for online and offline data collection, management and visualization; and a lightning tracker application deployed in the control room to provide real-time reports of equipment strikes and analytics of historical lightning strikes. The presentation will discuss how the projects share common, standard data, and allow for sophisticated analytics to correlate customer outages, equipment damage reports, lightning strikes, and asset maintenance history.
Session 1: Meeting the Challenges of Long Life Assets and Shorter Life Monitors
Andrew Fieldsend-Roxborough | National Grid
Many manufacturers are increasing their focus on ‘smart’ devices however these are being used to monitor assets that can be expected to last up to 60 years, much longer than most manufacturers continue to provide support. This presentation asks questions about how this issued might be approached.
Session 1: Operation and Maintenance of On Load Tap Changers (OLTC)
Rodrigo Mecabo | Maschinenfabrik Reinhausen MR
The On Load Tap Changer is one of the most critical components for a safe operation of the transformer.
Number of operations, application and design have effect in the Maintenance recommendations for reliable operation. Further development of the design and updates are as well relevant for the operation of the OLTC.
Big Data & Cyber Security Session: Using the Common Information Model (CIM) for Asset Health Data Integration
Pat Brown | EPRI
Information-based management of asset fleets is a topic of growing interest to electric utilities. Information-based approaches provide insight into asset condition on which accurate replace-repair-monitor decisions can be made, but require input from a variety of sources to be truly effective. This presentation will explore the use of the CIM (specifically, the recently published IEC 61968 Part 4 Edition 2) for effectively organizing and sharing asset health information among applications across the utility enterprise.
Session 1: Risks and Safety Aspects in Transformer Component Maintenance
Lars Liden | ABB
Transformers components such as high voltage bushings and on-load tap-changers normally require periodic maintenance. Studies and interviews showed that maintenance workers do perceive some risks when working with these components, especially when working on heights. This is to a large extent related to time pressure and not proper use of provided safety equipment. Modern transformer components require less maintenance and thereby less time working on heights.
Big Data & Cyber Security Session: Connected Asset Management – an Intelligent Platform for Utilities
Nada Reinprecht | Accenture Digital
This presentation will describe a cloud-based asset management concept for ‘asset heavy’ industries, in particular energy & utilities. This approach utilizes modern technologies to help utilities improve power system security and reduce asset life cycle costs. At its core is a data discovery platform that enables the creation of new data-driven revenue streams and new cost optimization strategies, based on IoT, enterprise, and external data. This platform would incorporate a pool of already developed analytics models that can be readily plugged into the solution plus a framework to develop new custom models as required by the utility. Also included is a range of artificial intelligence capabilities to streamline tasks – for example, maintenance tickets processing to support mobile work-force management and other utility processes. Benefits include real-time asset performance management and location tracking; data-driven maintenance and work dispatch for pro-active maintenance strategies; and orchestration of asset, management and operational data, creating an integrated view of the utility.
Session 1: DFA300 and GIS Surveys
John Nixon | ESB
A brief account of findings using the DFA 300 and its UHF and acoustic methods to identify possible issues on GIS. A look into cases found by UHF and acoustic surveys. And maybe another possible use as an indication of other issues.
Big Data & Cyber Security Session: Relay Settings Management in the Big Data Era
Bryan Gwyn | Doble Engineering Company
Settings management over the entire life cycle of protection relays is a core activity in the electrical power industry. Utilities that excel in this are able to maintain a high degree of power system security. An effective settings management system requires strict change management and quality control. This helps ensure that the power system security is maintained, even during constrained operating scenarios. With the scaling up of DER, EVs, and digitalization, more dynamic and robust handling of settings is needed. And new regulatory standards are requiring repeatable and verifiable systems/processes. All of this necessitates a new generation of settings management solutions that are able to efficiently handle data pertaining to the relays, settings, testing activities, setting change management, and workflows; as well as integrate with other systems such as work management and substation gateways. In this presentation, we describe the new relay management challenges and illustrate best practice solutions using recent utility examples.
Lunch and Industry Expo
Session 2: Distribution Network Asset Management – New Challenges and Opportunities
Ricardo Prata | EDP Distribuicao
EDP Distribuição is developing initiatives aimed at adapting to new realities and technologies, taking advantage of the continued technological investments being made in AMI. In this context, specific data analytics methodologies were developed to characterize the stochasticity of real data from measured load profiles and to adapt planning tools to such paradigm change, which involves the analysis of existing load diagrams and the definition of synthetic, probabilistic load diagrams. An overview of the probabilistic network analysis methodology and network analysis software will be presented by EDP Distribuição.
Big Data & Cyber Security Session: The Importance and Challenges of Implementing Cybersecurity on a Multi-Nation, Multi-Business, Century Old Company
Américo Guerreiro | Efacec
An increasing number of high profile incidents affecting all industries (from financial services, transportation to utilities and heavy machinery manufacturing) lead to a skyrocket in associate costs beyond financial impact (e.g. reputation and client trust). These incidents are creating a major challenge to EFACEC and its customers as around 40% of critical infrastructures and ICS are targeted by attacks (information from Center for Cybersecurity 2018, WEF). The increase in exposure by process and document digitalization leads to a larger attack surface and an increase in ICT (OT) vulnerabilities with increased value at risk for industrial products and its clients give rise to a global focus on cybersecurity by clients, competitor and regulators. In order to answer these increasing demands, EFACEC engaged in a global Cybersecurity program with the exclusive support of Top Management.
Asset Management Session 2: Power Transformers Asset Management Approach and Developments at REN
Mario Soares | REN
In the last years, REN has been in a process of adapting its procedures and organization for managing the critical assets. The creation of an asset management division at the company, allowed to have a more integrated approach to all the power transformer lifecycle phases, from technical specification to its end of life. Challenges for asset managers include the a significant part of the population ageing while keeping a relevant expansion to cope with new demands from the grid, incentives to life extension and optimization of total expenditures, new procurement processes and integration of new suppliers, keeping the asset health and risk under control. In this presentation we will focus on steps taken at REN and tools developed to face these challenges.
Big Data & Cyber Security Session: Practical Substation Security – How to Leverage Field Operations to Secure the Grid
Gowri Rajappan | Doble Engineering Company
In recent years, nation-state backed Advanced Persistent Threat (APT) have targeted industrial and critical infrastructures. APT attacks have disrupted refinery operations and caused power grid outages. In these attacks, personnel with access to the ICS assets, including field personnel, are particular targets as an attack vector. But as the only part of the utility that has regular contact with the substation assets, they are the vanguard of any defensive strategy as well. This presentation will describe our real-world experience in augmenting field operations with new tools and processes to improve security. Such an approach has the considerable payoff of making the field operations more efficient as well. The IT needs of field personnel have long been neglected and, as this presentation discusses, the investments in the field operations has the potential to improve security as well as productivity.
Session 2: Experiences of Managing Oil Analysis Data
Andrew Fieldsend-Roxborough | National Grid
This presentation covers National Grid’s experience in managing its Oil Analysis Data. This includes the specification, procurement and use of both the previous and current system. It address the considerations and compromises made when choosing a solution and provides feedback on the world’s largest deployment of Inside View.
Big Data & Cyber Security Session: OT Cybersecurity in Grid Operations
Bas Kruimer | DNV-GL
Security for Operations Technology (OT) environments such as Control Centers and Substations is a difficult challenge. The architectures of the OT environments are designed for high availability; the cyber assets in such environments are often old and vulnerable. Most available security solutions have been developed for IT environments and are ineffective in the OT environment. In the recent years, there has been a marked increase in the targeting of the electric power grid by sophisticated hackers. Consequently many new security requirements such as the EU NIS Directive have been put in place to ensure the security of the critical electric power infrastructure. This presentation will provide an overview of cybersecurity threats to OT environments and best practice approaches to protect them.
Session 2: Development of a Fault Current Limiting Power Transformer
Shuhong Wang | Xi’an Jiaotong University
The fault current limiting transformer (FCLT) integrates the transformer, reactor, fast vacuum circuit breaker and capacitor in a massive structure. Both simulation and experimental results suggest the current limiting effects of FCLT. Compared to separate reactor and power transformer, as well as, high leakage impedance transformer, the FCLT possesses the characteristics of intelligence, is compact and saves energy.
Big Data & Cyber Security Session: Electromagnetic Pulse (EMP) Threat and Mitigations for Substations
James Young | ETS Lindgren
Rogue Nation State actors and increasingly sophisticated terror threats have motivated a plethora of new security requirements for critical substations. One threat that is gaining renewed interest is that of electromagnetic weapons directed against critical cyber assets such as SCADA and protection relay devices. Electromagnetic Pulse (EMP) from a high altitude nuclear detonation or Intentional Electromagnetic Interference (IEMI) from a truck-mounted or drone-based directed energy weapon could disable or destroy such electronics. In this presentation, we provide an overview of the threat, impact on critical substation assets, and possible mitigations.
Session 2: Failure Investigation of Petrochemical Plant Cables
Simon Sutton | Doble
Following a number of cable joint failures at a petrochemical plant a detailed investigation was undertaken into the root cause; this study identified two key issues. In one instance contaminants were introduced during the installation process. In the other, all joints were affected by a poor selection of components putting all joints at risk of failure.
Session 2: Factory Acceptance Testing – More Than Just a Tick In the Box
Richard Heywood | Doble Engineering Co.
To ensure that transformers deliver a long and trouble-free life, it’s essential that they undergo thorough Factory Acceptance Tests (FAT). Besides the electrical tests, the FAT also provides an opportunity to check the quality and functionality of the auxiliary equipment, both in terms of operation and compliance with the specification. It’s crucial that the factory inspector is technically competent to witness the tests, with knowledge of transformer design, international standards and transformer testing techniques. The paper will show case studies where inspectors have “put a tick in the box” but missed key factors which have ultimately lead to issues for the transformer owner.
Big Data & Cyber Security Session: Challenges and Opportunities with Data and Analytics for a Utility
Vincent Gliniewicz | Vattenfall
DSOs are currently undergoing a thorough digital transformation that affects all parts of their organization. This presentation will introduce some of the current challenges identified at Vattenfall, some of the insights learned along the way during our data & analytics journey. What has been identified is that for such a transformation to be successful, one has to focus not solely on new technologies (especially buzzword technologies) but instead focus on the entire value chain, from people to business case and everything in between.
Joint Session: The Challenges of Operating in a Big Data World
Industry Expo & Reception
TUESDAY, 22 OCTOBER 2019
Session 3: Practical Experience of On-line DGA for the Detection of Incipient Fault in a Generator Step-Up Transformer
Joaquin Delgado Castilla | Naturgy
This presentation illustrates how on-line DGA monitors was able to detect and gave warning of Incipient Fault in a Generator Step-up Transformer.
It describes an example of transformer condition assessment based on Hydrogen (H2), Carbon Monoxide (CO) and moisture on-line DGA monitors measurements, due to online DGA monitoring allows faults to be detected as early as possible, by continuously assessing the levels of these gases in transformer oil, it was possible to detect an increasing hydrogen level, dissolved hydrogen is a key gas for detecting incipient faults at their earliest stage, it was found that the concentration of dissolved hydrogen in oil was more than 500ppm in less than eight hours, the power plant control room received an alarm of high hydrogen concentration, an oil sample was taken to carry out a DGA and find out the concentrations of methane, ethane, ethylene, acetylene, carbon monoxide, carbon dioxide and hydrogen and try to diagnose what the problem was. It was applied the Duval Pentagon method and it was found a thermal fault T3 ›700°.
Transformers are a critical part of a generation plant and, therefore, on-line DGA monitoring is a very useful tool to help operators to manage transformer and make decisions on operation and maintenance.
Protection & Control Session: Wind Power Plants – Network Stability Improvements Through Enhanced Frequency Protection
Jokin Galletero | GE Grid Automation
Nowadays there is a trend to increase the presence of DER (Distributed Energy Resources) worldwide due to the need of reduce global warming and climate change effect. This leads to more intense use of wind turbines in wind farms. The reduced system inertia produces more likelihood of variation of frequency in the grid, whereas the reduced power of individual generators leads to harmonics and other effects that may produce collateral effects in classical protections, especially those based on voltage and/or frequency.
This paper deals with the way GE has resolved unwanted underfrequency protection trips in a 33 kV substation, in 2018, under severe distorted waveforms. This has helped contribution to network stability and more renewable sources generation that reduces pollution, greenhouse effect and helps economical optimum operation of wind farms.
A disciplined approach to problem solving, combined with white box testing and smart V&V (verification and validation) process has leaded to a robust solution.
Several troubleshooting/testing techniques will be discussed where modern injection equipment and simulation tools have been paramount to success. Conventional DR (Disturbance Record) playback was not enough to resolve the harmonics issue due to limited sampling rate, so that waveform harmonic analysis and waveform synthesis was the key to recreate the nuisance trip and resolve the issue.
Session 3: Case Study of On-line Drying System for Power Transformers
Jean-Baptiste Frain | Streamer Electric
The presentation will be a case study from an online drying system for power transformers. Data will be presented for a number of systems installed.
Protection & Control Session: Real Life Islanding Detection Using Phasor Measurement Units (PMU) – EDP’s Experience
Miguel Louro | EDP
Distributed Generation (DG) is gradually increasing in Distribution Grid, both in LV, MV and HV, creating new challenges to utilities. One of them is the capacity to detect an unwanted islanding operation. As seen in recent studies, especially when the load demand is similar to generation, traditional anti-islanding detection protection functions, that rely mainly on frequency deviations and voltage variations at the interconnection point may present a low performance.
To suppress this constrains, new approaches are being tested, such as using the voltage phase angle difference between the main grid and the DG side. For the purpose of assessing the effectiveness of this approach EDP Distribuição (EDPD) decided to install a set of micro Phasor Measurement Units (µPMU) in the Interconnection point of EDP Distribuição’s Energy Storage System (ESS) that is connected to a MV 15kV grid and has the capability of being able to create an 15kV network island automatically in case of an outage in the feeder or manually.
Session 3: Transformer Loss Estimation
Asim Bajwa | Doble Engineering Co.
Knowledge about a transformer’s total losses is an important consideration for an electric utility in minimising costs associated with energy not supplied. For many transformers in service the test certificate is no longer available or the manufacturer has gone out of business, making it hard to gain information on the losses. In the field, it is not feasible to duplicate the methods for measuring transformer losses in the manufacturer’s test laboratories. Doble has performed measurements using portable test equipment of certain key parameters in the field and then estimated the losses from these results. These estimates are refined based on available design data, including masses recorded on the nameplate, engineering knowledge and field experience. Some case studies will be included to share real-life examples.
Session 3: Protection and Monitoring of Power Transformers From Thermal and Ageing Point of View
Zoran Radakovic | University of Belgrade
The influence of load shape on normal cyclic load and emergency overload into the parameters defining maximum permissible transformer load will be discussed. As per rating standards, maximum hot-spot and top oil temperatures, the ageing and the maximum per unit load are considered in the analyses. This will be illustrated with load patterns from during the political turmoil and war years in the ex-Yugoslavia states. The paper will further consider issues related to transformer cooling including detection of outer cooling failure, cooler pollution (fouling factor) and control of the fans to minimize total energy operating losses.
Protection & Control Session: Getting the Right Time Right
Chris Farrow | Chronos Technology Ltd.
GNSS is used globally as a source of precise time and frequency for many applications but often little thought is given to testing or proving that the time provided is actually correct. This talk will initially focus on a background overview of GNSS technologies using GPS as an example with some real world case studies of common user mistakes made in implementation. GNSS signal hardening and firewall technologies will be introduced with particular focus on use of GNSS as a Power Industry PTP profile master clock.
Session 3: Synergies in Application of Ester Fluids and Aramid Insulation
Radoslaw Szewczyk | DuPont
With continuous advancements in insulation materials it is more and more common that transformers use various types of ester fluids. Insulation systems may combine the ester fluids with aramid insulation in the form of paper or pressboard. The presentation describes selected solutions and related benefits. For example, combination of esters with high temperature aramid insulation allows for compactness of transformer design.
Application of esters with cellulose paper enhanced with aramid is described, too. This new insulation paper offers different capabilities than pure aramid paper, as it is only suitable for operation at 130°C in esters. It does not allow for significant size reduction of a transformer but gives extended life of insulation system, overloadability, lower sensitivity to high ambient temperatures. Combination of ester fluids with the aramid enhanced cellulose paper allows for cost optimization of transformer filled with ester liquid. Examples of cost optimization are presented.
Session 4: Forensic Studies on 9 Tear Down Power Transformers – Correlation Between DPv Paper and 2-FAL and Extrapolation to Estimate the Remaining Useful Lifetime of Relative Transformers In Service
João Vasco Ferreira | EDP Distribuição
EDP Distribuição and LABELEC conducted a study whose purpose was to develop a methodology to estimate the remaining useful lifetime (RUL) of 86 High Voltage (HV)/ Medium Voltage (MV) power transformers in service, based on data from the DPv (viscometric degree of polymerization) measurements of insulation paper of 9 HV/MV power transformers intended for scrapping.
Protection & Control Session: All You Wanted To Know About Bucholz Relays
Rodrigo Mecabo | Maschinenfabrik Reinhausen MR
This presentation will talk about the the concept, construction, application and testing of Buchholz relays. These relays, which are applied on liquid filled transformers and reactors with oil conservators, act as a central protection system.
Installed in the pipeline between tank and oil conservator, it reacts to faults which occur inside the transformer. Damages which are not visible can be detected early by the Buchholz relay.
Gases moving in the direction of the oil conservator or shock waves created by the rapid gas development trigger the signaling system of the Buchholz relay.
The Buchholz relay also takes over the function of an oil level indicator when there is not enough oil in the conservator or when there is an oil leak.
Session 4: Experiences of an Electricity Transmission Network Company Modeling End of Life Asset Risk
Peter Macfie | National Grid
Network Output Measures (NOMs) enable the Electricity Transmission Owner to demonstrate that investments have been targeted correctly to manage network risk. Using NOMs, the transmission owner can identify work needed to manage assets to deliver a known level of network risk, thus providing assurance that performance is maintained in future price control periods. One of the key objectives of the NOMs common methodology, which was published by Ofgem in 2018, was to agree a method for monetising asset risk associated with the end of life deterioration of each asset. The challenges associated with the development of this methodology will be conveyed to the audience through this presentation.
In particular a method was developed to quantify end of life asset condition, which concluded in a set of bespoke end of life health scoring approaches associated with each of the main asset types that National Grid is responsible for. A key result of this work was the development of an approach to generate an end of life asset health score in a range from zero to 100, and thereby facilitate a move away from the previous approach that worked by assigning assets to a particular asset health bucket. The new approach was then subjected to an extensive calibration, validation and testing exercise.
Protection & Control Session: Challenges for Protection in Grids with Distributed Generation
Joao Pissarro | Siemens
The increased decentralized power generation has an influence in all voltage levels of our electrical power grid. This leads to new challenges for protection devices and systems and requires an adapted concept for protection with the right selected protection devices and settings. The presentation is showing those challenges and via examples the impact for the protection systems
Session 4:OLPD Continuous Monitoring of HV Motors – Experience and Lessons Learnt from a Long-Term Life Extension Project
Riccardo Giussani | HVPD
This presentation provides an overview of the development of Online Partial Discharge (OLPD) condition monitoring systems for complete MV and HV networks in the Oil and Gas industry with focus on rotating machines. The experience and lessons learnt from a long‑term life extension project on a large population of 10 kV motors is presented. Case studies showing correlation of OLPD monitoring data and visual inspections are reported.
Lunch and Industry Expo
Session 5: Enhancing Power Transformer Thermal Performance under Challenging Circumstances
Paul Jarman | University of Manchester
The thermal performance of a power transformers is normally the main determinant of its lifetime, so understanding the behaviour and limitations of conventional cooling arrangements is vital. Being able to predict cooling performance under extreme circumstances, e.g. extremely low or high ambient temperatures or with alternative transformer liquids, depends on knowing how the liquid properties affect the internal cooling flow. Using 2D and 3D computational fluid dynamics coupled with experimental results and dimensional analysis, it is possible to predict in quite a general way when undesirable flow patterns within the transformer will emerge leading to dramatically reduced thermal performance. This understanding also allows an evaluation of when more detailed modelling techniques are required to accurately estimate thermal performance in terms of hotspot factor. In this presentation, theoretical, numerical and experimental studies are jointly implemented to enhance the understanding of transformer thermal behaviour in these challenging circumstances.
Protection & Control Session: Digital Substation Architectures Today and Future Outlook
Rogério Paulo | EFACEC
The industry is undergoing a generation shift in substation automation, from second generation station-level distributed architectures to third generation systems employing process-level networks, NCIT and field-level electronics, with full use of IEC 61850. Utilities around the world are either piloting or developing new specifications for third-generation systems, leaders already adopting such solutions as industry praxis. New products based on IEC 61850 recently released allow users to exploit novel optimized architectural solutions for distribution and transmission. In parallel we are witnessing a major push towards digital economy across all industries with cloud, AI and bid data technologies becoming massively available. Asset management based on real-time monitoring, remote systems management and digital engineering are new trends that will also be integrated in future solutions. In this presentation current digital substation industrial experience is reported, the maturity level for third generation systems is discussed and a vision on challenges and opportunities for future generation systems is presented.
Session 6: Digital Monitoring and Asset Management in Generation
Nuno Rocha | EDP Generation
After a decade of fast paced growth and intense investment in new generation capacity, utilities in Europe face many challenges; reduction in electricity consumption associated with the economic downturns and energy efficiency measures, high penetration of intermittent renewables, decentralized generation technologies and introduction of micro-grids. This new paradigm has heavily impacted those producers with conventional generation fleets, where market remuneration schemes and regulatory changes have severely pressured their businesses. In the context of the completion of a large investment program in Portugal, and driven by the aforementioned energy sector changes, EDP redefined its generation fleet operation and maintenance strategy in the Iberian Peninsula supported by 3 main pillars:
• (P1) Embrace a reliability approach to manage asset failure risk
• (P2) Improve current O&M practices
• (P3) Develop an asset health monitoring capability to get ahead of asset failures.
Under this last pillar, a new Remote Monitoring and Diagnostics Area was created which will be the focus of this presentation.
Protection & Control Session: Integration, Protection, and Maintenance of Renewable Power Plants
Ana Morales | DigSilent
Ed Khan | Doble Engineering Company
The application of renewables is a topic that is attracting a lot of attention since it impacts the electric grid in several different ways. There are some positive and some negative impacts that need to recognized and solutions need to be implemented. Understanding the issues is important for different segments of the industry. It impacts utilities, companies designing such plants, manufacturers, testing companies and maintenance personnel.
With these factors in mind, this presentation is intended to describe the operation and behavior of these plants, explain the issues and lay out solutions that are being implemented. It is designed to deal with technical aspects of proper integration and efficient operation of these plants.
Hence, this presentation will cover the following topics:
- 1. Introduction of renewables
- General comparison with conventional power plants
- Short circuit contributions from wind generation (different types)
- Short circuit contributions from solar plants
- Protection applied at the plant and interfacing utility grid
- Harmonic penetration and solutions such as harmonic filters
Session 6: Investigation Into Internal Resonances in Distribution and Wind Turbine Transformers
John Lapworth | Doble Engineering Co.
This paper describes an of several failures of distribution and wind turbine transformers. Special tests undertaken point to internal over-voltages due to switching-induced resonances as being responsible. Recommendations are suggested to avoid such failures, including enhanced factory acceptance tests.
Session 6: In-Service Partial Discharge Assessment of GIS Cable Terminations
Falk Werner | Doble Engineering Co.
Partial Discharge is a commonly used indicator in insulation system health assessments. Presence of partial discharge within HV apparatus can provide valuable information regarding potential deterioration of the insulation system. This presentation provides a brief introduction to partial discharge and focuses on PD measurement methods on GIS and cable terminations. A case study is presented, which illustrates the application of different measurement and analysis methods. While the presentation focuses on a GIS assessment, the presented methods can be applied to a wide range of HV apparatus.
Session 6: EMI/EMSA Testing and Recognition of Key Patterns
Michal Slodkiewicz | Doble Engineering Co.
Electromagnetic Interference testing is an expert based condition assessment technique that requires significant experience to interpret results reliably. The data is typically shown in two formats: frequency domain (EMI signature) and time domain (zero-span). By adding in phase-resolved plots of the time domain data this can assist users in identifying common discharge patterns more easily. Several common discharge patterns found in electrical generation systems will be presented with interpretation.
Session 7: Smart Cities – The Key to Decarbonize the Future
Cipriano Lomba | EFACEC
Cities represent about 67% of world’s primary energy demand, which will increase by 70% between 2013 and 2050. Meanwhile, cities are evolving from consumers to net generators of energy and advanced smart grid solutions and building automation are improving energy efficiency. Distributed renewable energy systems and energy storage capabilities implemented in multiple urban infrastructures are contributing decisively to net zero or plus energy neighbourhoods, being them connected or disconnected from the conventional energy grid. This technological revolution will boost resilience and energy efficiency and reduce emissions. Efacec’s smart city concept, although covering all scope of actuation of the city management process, focuses on the areas where Efacec has been creating distinctive solutions, leveraged by the endogenous skills of its people: Energy, Environment, Mobility and Digital Connectivity. These areas are the main vertical subsystems of a smart city, symbiotically integrated in an inter-operable holistic platform. During the presentation, several examples and case studies will be explored.
Joint Session: Impact of Renewables on Grid Stability, the Assets and Management Solutions
EuroDoble Committee Meeting & Dinner
WEDNESDAY, 23 OCTOBER 2019
Interactive Workshop: Condition Monitoring – Expectations, Specifications, Data Analyses and Decision Support
Tony McGrail | Doble Engineering Company
This session will look at the process of identifying and specifying appropriate condition monitoring, then applying and gaining benefit from such devices. Condition monitoring is based on measuring individual parameters which can be used to detect an anomaly and, with appropriate analytics, diagnose a possible root cause. To perform these functions, the monitor must be of sufficient quality and capability to provide good, usable data; imprecision in data will be compounded in analyses and lead to disappointment in diagnostics. It is important to identify the parameters of importance and specify a monitor which will meet expectations. The analyses must conform to standards, where available, but must also take into account the local context – variation with asset operation and environmental factors. To support realistic decisions, the monitor must provide data in a timely manner and be deployed in a way which enables action, rather than introspection. Setting alert levels and response plans should be part of the monitor installation and commissioning plan, along with the communications and infrastructure updates. The session will include practical examples for illumination.
Utilities Only Session
Preregistration and approval is required. Please note that the number of participants is limited!