计及FACTS校正控制策略的电网静态安全风险评估  

Power Grid Risk-Based Static Security Assessment Considering Corrective Control Strategy of FACTS Devices

作　　者：施鹏佳 文云峰[1] 郭创新[1] 杨秀瑜 田启东 

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027 [2]深圳供电局有限公司,广东省深圳市518033

出　　处：《电网技术》2015年第9期2565-2570,共6页Power System Technology

基　　金：国家自然科学基金项目(51177143)~~

摘　　要：为解决传统校正控制机组响应慢的问题,文章采用柔性交流输电系统元件(flexible AC transmission systems,FACTS)对事故后潮流进行控制,并研究了FACTS设备对电网静态安全风险水平的影响。以事故后线路过载和节点低电压水平为严重度函数,建立了量化的运行风险评估指标;采用灵敏度分析方法,根据电网静态安全风险对FACTS控制变量的灵敏度指标确定了FACTS设备的最优安装位置;基于功率注入模型,提出一种计及FACTS的事故后潮流快速校正控制模型,并将其应用到电网静态安全风险评估算法中,以消除因设备故障造成的线路功率紧急过载和节点低电压的情况。IEEE RTS79测试系统算例分析表明,所提出的方法能缓解事故后潮流紧急过载和节点低电压情况,并有效降低系统的静态安全风险水平。In order to solve the drawback of slow response of conventional generation in corrective control, this paper adopts flexible AC transmission systems（FACTS） devices to control post-contingency power flow, and investigates the effect of FACTS devices on static security risk level of power grid. According to post-contingency line overloads and bus low voltages levels, the quantized risk assessment indices are established. Sensitivity analysis method, based on sensitivity of power grid static security risk with respect to control variables of FACTS, is adopted to determine optimal location of FACTS devices. Based on power-injection model, a fast post-contingency power flow corrective control model considering FACTS devices is proposed and integrated into risk-based static security assessment process to eliminate emergency overloads and low voltages caused by line outages. Simulation results on IEEE RTS79 test system show that the proposed method can relieve post-contingency emergency overloads and low voltages and effectively reduce system operating risk.

关 键 词：柔性交流输电 风险评估 校正控制 静态安全 

分 类 号：TM744[电气工程—电力系统及自动化]