考虑信息设备故障的分布式电压控制系统风险评估

Risk Assessment of Distributed Voltage Control System Considering Information Equipment Failure

随着主动配电网的持续发展,电力系统对信息系统的依赖越来越严重,信息设备的随机故障给配电网电压控制带来巨大挑战。为评估信息设备故障对配电网分布式电压控制的影响,首先分析了配电网分布式电压控制系统的组成、控制机理及一致性算法的原理;其次建立了光伏出力运行场景模型和信息设备故障场景模型;然后提出了分布式电压控制下计及信息设备故障影响的电压评估方法,建立了评估指标并给出计算方法;最后通过算例仿真,对比分析了不同类型、位置的信息设备故障对电压的影响,并计算电压风险,结果表明枢纽代理节点故障带来的电压风险最为严重,应根据源荷不平衡程度进行通信网配置。

With the continuous development of active distribution networks,the power grid increasingly depends on information system,and the random failure of information equipments brings huge challenge to voltage control of distribution network.To evaluate the affection of information equipment failure on distributed voltage control of distribution network,firstly,the constitution of distributed voltage control system of distributed network,its control mechanism and the principle of consensus algorithm were analyzed.Secondly,the photovoltaic(abbr.PV)power output operation scenario model and the information equipment failure scenario model were established,and then under the distributed voltage control and considering the affection of information equipment failure a voltage evaluation method was proposed and the evaluation index was established and the computing method was given.Finally,by means of the simulation of computing example the affections of the failure of different kinds of information equipments at different locations on the voltage were contrasted and analyzed and the voltage risks were calculated.Simulation results show that the voltage risk caused by hub agent node fault is most serious,thus the communication network should be configured according to the degree of source load imbalance.