基于电压调差率的风电场并列运行静止无功补偿装置协调控制

Static Var Compensation Devices Coordination Control in Parallel Operation of Wind Farm Based on Voltage Adjustment Coefficient

目前风电场并列运行无功补偿装置间的出力分配依赖于电压协调控制系统,在协调控制器通讯故障时整个风电场的电压稳定大幅降低。借鉴机组励磁系统电压调差的整定原则,将设定的调差系数引入到风电场静止无功补偿装置控制环节,从而实现多套装置间的配合协同来提高电压稳定性。通过仿真分析和现场试验均验证了调差的整定对协调控制能力的效果显著,可以实现装置的稳定运行和快速调节。该技术不但解决了风电场多套无功装置的协调配合,也大幅减少了风电场设备投资,提高了经济效益。

Now in wind farm,the load distribution of reactive power compensation devices in parallel operation relys on voltage coordination control system.When the communications among coordination controllers fail,the voltage stability of wind power station is greatly reduced.According to the setting principle of voltage adjustment in excitation system of generator unit,the adjustment coefficient setting is applied to the controlling unit of static var compensator devices in wind farm to achieve the coordination among multiple devices and thus increase the voltage stability.Simulation analysis and field test both verify that the adjustment coefficient has obvious and remarkable effect on coordination control,and can achieve stable operation and quick adjustment of devices.The technology not only can achieve coordination among multiple reactive power devices of wind farm but also can greatly reduce equipment investment and increase economic benefit.