特高压交直流接入后江西电网第三道防线适应性分析

Adaptability analyse of the third defense line after UHV AC/DC access to Jiangxi power grid

预计未来2年内雅中特高压直流输电工程和华中特高压交流双环网均将在江西建成投运,但目前还未有针对江西电网第三道防线在特高压交直流接入后的适应性问题进行分析的文献。以此为背景,提出一套适应性分析的方案,通过仿真软件PSASP对第Ⅲ类故障中的死区故障、中开关拒动故障的故障形态进行模拟和仿真,分析不同站点故障对电网运行的影响,并根据江西电网第三道防线配置现状及相关要求采取切机、切负荷等措施。仿真结果表明江西电网第三道防线能够较好地解决大部分严重故障,在采取安控措施后系统可恢复至稳定状态,具有较好的适应性。

It is predicted that the Yazhong-Jiangxi UHVDC project and UHVAC loop network project of the Central China Power Grid will be putting into operation in the next two years,but there is no literature to analyze the adaptability of the third defense line after UHV AC/DC access to Jiangxi power grid.In this case,proposes a set of adaptive analysis schemes,through the PSASP program and simulates two kinds of typeⅢfaultsdead-zones fault and middle switchgear malfunction,analyze the influence of different stations failure on power grid operation,then according to present situation of the third defense line configuration of Jiangxi power grid and related requirements,some measures were taken,such as cutting generators,cutting loads and so on.The result showed that the third defense line in Jiangxi power grid can solve a large part of faults,the power grid can be restored to a stable state after security measures were taken,and it had better adaptability when faced to the serious faults.