基于IEC61850标准的变电站综合自动化系统

提出了数字化变电站综合自动化系统统一架构,论述了数字化变电站综合自动化系统内智能化设备集成和站内设备间信息共享以及站内信息与远端的交互问题。讨论了IEC61850标准在变电站自动化系统通信平台中的应用,并分析了变电站综合自动化存在的安全问题。     

基于区块链技术的智能变电站配置版本管理

变电站的数字化配置是一个复杂过程,其频繁修改的配置文件存在管理效率低、监管难、过分依赖人员素质、风险高等风险。在深入分析区块链技术对于解决变电站配置问题的适应性的基础上,设计了基于区块链的变电站配置文件版本管理框架。对其中数据层区块结构、网络层组织、共识层机制、智能合约层实现、业务流程、存储空间回收、统计和监视等关键技术应用进行了详细设计。最后对所设计方案进行了性能和安全性分析。基于区块链的变电站数字化配置版本管理,提供了一个分布式系统方案,实现了基于智能合约的自动化更新,实现了不可篡改和可追溯的客观化监管。其效率和安全性有一定技术保障,为智能变电站的工程应用提供了一种新的解决思路。     

变电站IEC 61850第2版信息及服务模型探讨

IEC 61850第2版标准对变电站内应用新增和改进了很多内容。结合智能变电站工程应用需求,对第2版信息模型和通信服务模型的新增改进内容进行了深入分析,其中有些改进可以解决目前智能变电站工程实施中面临的问题,有些则有助于提升智能变电站的运维效率和管理水平。其次对智能变电站中重要的自动化功能包括控制、定值、GOOSE、跟踪服务等,提出了基于第2版信息模型和通信服务模型的工程应用方法,讨论了工程应用中应注意的问题。     

智能变电站监控系统防止电气误操作功能的实现

在智能变电站中,应用IEC 61850标准进行信息交互,按站控层、间隔层、过程层设置防误闭锁功能,可以提高操作的可靠性,简化二次系统设计。研究在智能变电站监控系统中实现防误操作的实现方案,提出了变电站三层防误闭锁功能的系统架构,研究并改进了IEC 61850关于防误闭锁功能的通信接口,并提出了一套防误操作规则的表示方法。     

基于IEC 61850的集中式馈线自动化信息模型

配电系统中广泛应用的集中式馈线自动化为满足配电主站与配电终端间互联互通,对构建符合IEC 61850标准的信息模型提出了迫切需求。介绍了IEC 61850-90-6技术报告中故障指示相关逻辑节点,在分析集中式馈线自动化工作原理的基础上,基于新定义的电流指示逻辑节点SCPI、电压指示逻辑节点SVPI、故障指示逻辑节点SFPI,研究了集中式馈线自动化功能实现的信息模型,推动了IEC 61850标准在配电自动化中的应用。     

基于IEC 61850的电-气能源互联微电网运行控制方法

为缓解环境污染而进行的能源结构调整,使得化石能源逐步被天然气替代,进而让电-气能源互联微电网成为研究热点。为保证电-气能源互联系统运行的安全可靠性,基于IEC 61850信息模型,提出了一种以JADE平台为基础的电-气能源互联微电网运行多代理控制方法。在分析电解制甲烷设备运行特性的基础上,首次建立了电转气(power to gas,P2G)设备的IEC 61850控制模型。对控制模型的仿真结果表明,IEC 61850可保证各代理间信息交互的统一性和互操作性,电-气能源互联微电网也因此可得到有效控制,其安全可行性也得到有效保障。     

A service interruption free testing methodology for IEDs in IEC 61850-based substation automation systems

This paper presents a methodology for the testing of intelligent electronic devices (IEDs) in IEC 61850-based substation automation systems (SAS), without any service interruption to the end users, during the testing process. IEC 61850-based SAS provides opportunities for a new level of substation operation, enhancing operating efficiency, and protection reliability based on Ethernet-based communication networks. Due to these changes to the conventional substations, importance and dependency on IEDs is increasing rapidly. Frequency of faults occurring in the power systems is random in nature and is unpredictable. It is necessary to test and maintain the IEDs to ensure their proper operation at crucial times. This paper presents a novel methodology for testing the IEDs, without compromising the service reliability during the testing process. The proposed methodology exploits the inherit characteristics of IEC 61850 standard i.e. Network - based communication, interchangeability between multivendor IEDs, and engineering based on substation configuration language (SCL) files. The feasibility and robustness of the proposed method has been verified by performing several performance verification tests with different performance metrics.     

Challenges and research directions for heterogeneous cyber–physical system based on IEC 61850: Vulnerabilities,security requirements,and security architecture

IEC 61850, an international standard for communication networks, is becoming prevalent in the cyber–physical system (CPS) environment, especially with regard to the electrical grid. Recently, since cyber threats in the CPS environment have increased, security matters for individual protocols used in this environment are being discussed at length. However, there have not been many studies on the types of new security vulnerabilities and the security requirements that are required in a heterogeneous protocol environment based on IEC 61850. In this paper, we examine the electrical grid in Korea, and discuss security vulnerabilities, security requirements, and security architectures in such an environment.     

Laboratory testing of process bus equipment and protection functions in accordance with IEC 61850 standard. Part I: Electrical arrangement and basic protection functions tests

The use of process bus modern technology in accordance with the IEC 61850 protocol allows performing modern measurement and improving the protection automation system. It also allows for the integration and complex building of functional automation and control systems based on network devices in Ethernet technology. The paper presents measuring tests of a process bus equipment and the operation of protection functions based on measurements.     

Phasor measurement based on IEC 61850-9-2 and Kalman–Filtering

This paper proposes a new technique for estimating phasors during the transient phenomena in the electrical power systems. Unlike traditional Phasor Measurement Units (PMUs) that estimates phasors at process level, the proposed technique estimates phasors at bay level. The estimation technique relies on a robust recursive Kalman–Filtering, which is employed for computing the phasors based on the time-critical IEC 61850-9-2 Sampled Measured Values casted by the substation Merging Units (MUs). Many evolution tests of the proposed technique have been carried out for both stationary and transient phenomena in power systems to determine the accuracy of the measurements obtained at various conditions. The proposed estimator can produce phasors at bay level with reporting rate of 100 frames per second, which is encouraged in IEEE Std C37.118 and can satisfy higher accuracies than provided by the traditional Phasor Measurement Units, which are 0.01 degree and 0.01% for phase and magnitude, respectively.