计及风力发电并网的配电网潮流优化

Power Flow Optimization of Distributed Network Considering Wind Power Generators

研究了风力发电并网的潮流优化问题,分析了风力发电在潮流计算中常用的模型和方法。并针对风力发电机组并网需要吸收电网大量无功造成配电网损耗增大的缺点,采用并联电容器对配电网无功进行补偿。在满足风电场无功补偿的前提下,把风机的异步发电机组视为PQ节点,应用前推回带法计算了风机并网后的配电网潮流,在此基础上采用改进的粒子群算法对配电网无功补偿电容器进行了优化。重点讨论了风力发电并网对配电网的网损和电压的影响,并在配电网分析常用的33母线系统上进行了仿真计算,得到了较好的实验结果。

The problem about power flow optimization of distribution network with wind power generators is studied, and the commonly used models and methods in power flow calculation of wind power generation are also analyzed. Considering that wind power generators integrated with the grid may produce much active power loss by absorbing a lot of reactive power, so shunt capacitor is adopted to compensate the distribution network. Under the premise of satisfying the reactive power compen- sation, the asynchronous generators of wind farms are treated as PQ node to calculate the power flow of distributed network af- ter the integration of wind power generators using the forward ad backward method. On this basis, the improved particle swarm algorithm is adopted to optimize the reactive compensating capacitor. The focuses are on the influence of wind power integra- tion on the power loss and voltage level of distributed network, and the validity and practicability of the proposed method are simulated by an example of wind farms connected to 33 bus system, which has a satisfactory and acceptable result.