考虑分散式风电的配网电压稳定性研究

根据分散式风电场接入配电网的等效模型,分析了双馈风电机组接入配电网的无功出力特性。利用双馈风电机组快速的动态无功响应特性,提出了风电机组自身无功出力参与各接入点无功电压控制的分散式风电无功电压协调控制方案。通过监测分散式风电场各接入点出力与电压信息,采用过滤集合的原对偶内点法求解无功电压协调控制模型,在满足各接入点电压约束的同时,均衡了风电场的无功裕度,提高了配电网的电压稳定性。通过30节点配电网算例验证了所提模型及控制的合理性和有效性。

Distribution network voltage stability considering dispersed wind farm

According to reactive power problem of wind plant farm under anti-typhoon operation,a system model was established.The model was composed of many equipment models:standby power,shunt reactors,power transformers,buried cables and wind turbines equivalent model.Then power parameters of the electric models were calculated,so shunt reactor parameter optimization method was proposed.When the wind turbine was equivalent to the model,some subsystems within the wind turbine (including yaw system,hydraulic system,control cabinet fans,ventilation fans) were taking into account,which had different importance in different working conditions.It uses the neural network learning methods for the best weight coefficient.The results compare between the calculation result with the actual trials ones show that error is very small,so it provides a reference means about selecting wind farm device parameter for future.