含风电场的电网无功配置方案研究

Research on reactive power configuration for power network with wind farm

针对风电功率波动对地区电力系统电压稳定的影响、大规模集群风电并网点电压支撑能力较差、无功电压容易诱发严重的系统安全稳定事故等现象,提出采用仿真模拟方法,以0.7出力水平无功配置方案为例,对各节点电压分布、关键线路潮流、此无功配置方案下电压分布及出力极限进行了分析。结果表明:风电场接入点离主网越近,电压支撑能力越强;加装串联补偿设备和静止无功补偿器(SVC)可提高重载工况下电压稳定水平。

Aiming at the problems such as the influence of wind power frequency fluctuation on voltage stability of local power system, the poor ability of voltage to support at the point where massive cluster of wind power parallel in, the effects of reactive power voltage and the accidents threatening safe and stable operation of power system, this paper, taking 0. 7 output level reactive configuration program as an example, proposes a simulation method, by which the voltage distribution of every node, the trend of critical path and the voltage distribution and the output limit under this configuration program are analyzed. The results show that the ability of voltage to support gets stronger when the access point of wind farm is close to the main network, besides series compensation equipment and static var compensator （SVC） enable the enhancement of voltage stability under heavy load.