CAJ | 학술논문

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.
위해결전통교정공제궤조향응만적문제,문장채용유성교류수전계통원건(flexible AC transmission systems, FACTS)대사고후조류진행공제,병연구료FACTS설비대전망정태안전풍험수평적영향.이사고후선로과재화절점저전압수평위엄중도함수,건립료양화적운행풍험평고지표;채용령민도분석방법,근거전망정태안전풍험대FACTS공제변량적령민도지표학정료FACTS설비적최우안장위치;기우공솔주입모형,제출일충계급FACTS적사고후조류쾌속교정공제모형,병장기응용도전망정태안전풍험평고산법중,이소제인설비고장조성적선로공솔긴급과재화절점저전압적정황.IEEE RTS79측시계통산례분석표명,소제출적방법능완해사고후조류긴급과재화절점저전압정황,병유효강저계통적정태안전풍험수평.
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.