Reliability analysis of electric utility SCADA systems
Reliability analysis of electric utility SCADA systems
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DOI：
10.1109/pica.1997.599397
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发表时间：
1997-05
期刊：
影响因子：
--
通讯作者：
A. G. Bruce
中科院分区：
文献类型：
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作者：
A. G. Bruce
电力公司的SCADA系统必须高度可靠，因为SCADA系统有可能直接导致负荷削减。本文从SCADA系统对电力系统减载的预期总贡献出发，对SCADA系统的可靠性进行了分析。以系统分钟为单位表示这一总和，并应用适当的损坏成本函数，然后提供SCADA系统可靠性价值的年度成本度量。采用一种发电和输电系统可靠性综合评估技术，对SCADA和电力系统联合模型进行了数值分析。它执行蒙特卡罗模拟，包括用于枚举电网负荷削减状态的最佳潮流和SCADA系统组件连接分析，以确定SCADA控制的可用性。通过比较两种可选的SCADA体系结构来说明这种分析的应用。Trans Power采用了子传输SCADA架构，该架构利用了在其国家SCADA系统之外运行的终端。这些终端已经取代了位于每个地区的独立系统。评估的目的是量化由于联合负荷削减而增加的经济损失。
Electric utility SCADA systems must be highly reliable given the potential for the SCADA system to directly contribute to load curtailment. This paper presents an analysis of SCADA system reliability in terms of its expected aggregate contribution to load curtailment on the power system. Expressing this aggregate in system minutes and applying an appropriate damage cost function then provides an annual cost measure of SCADA system reliability worth. A composite generation and transmission system reliability evaluation technique is used to perform the numerical analysis of the joint SCADA and power system model. This performs a Monte-Carlo simulation and includes an optimal power flow for enumerating grid load curtailment states and analysis of SCADA system component connectivity to determine availability of SCADA control. The application of this analysis is illustrated in a comparison of two alternative SCADA architectures. Trans Power has adopted a subtransmission SCADA architecture which utilises terminals operating off its national SCADA system. These terminals have replaced separate systems located in each area. The objective of the evaluation being to quantify the increased exposure to financial losses due to joint load curtailment.