风电接入系统后的电压稳定问题

针对风电接入系统后电网电压的稳定将变得更加复杂的问题,分析并指出负荷特性、风电并网点的选择、系统的无功电源以及风电机组特性等是影响电网电压稳定的主要因素.为提升风电接入系统电网后电压的稳定性以避免电压崩溃的发生,提出了几种措施,主要包括充足的风电场无功补偿装置配置,合理的电源结构配置.完善的低频/低压减载整定以及风机技术性能的提升等.通过一个实际系统的仿真算例说明了双馈风机的低电压穿越能力对于阻止电压崩溃的有效性.

Voltage stability after grid-connection of wind farm

The voltage stability becomes more intricate after the wind farm connects with grid and the main influencing factors are analyzed,such as the load characteristics,connection point selection,reactive power sources and unit characteristics.Several countermeasures are proposed to improve voltage stability and avoid voltage collapse,including the sufficient reactive power compensation,proper power source structure,perfect load shedding schedule and enhanced wind turbine performance.Simulation for a real power s...