动态无功补偿装置抑制风电汇集地区高电压问题的可行性研究

当大规模风电集中接入弱端电网对,短路故障后会出现高电压的问题,造成风电机组因不具备高电压穿越能力而脱网.运行经验表明高电压穿越问题已经成为风电机组脱网的主要原因.文章从上述问题出发,探索通过风电场普遍配置的动态无功补偿装置抑制高电压的问题,在BPA中搭建了不同动态响应时间的SVC/SVG模型,并对比分析了不同响应时间、不同容量、不同类型的无功补偿装置对抑制高电压的效果.仿真结果表明,适当容量满足标准要求的动态无功补偿装置可以很好地抑制短路故障后的高电压问题,对于提高风电汇集地区无功电压安全水平有明显效果.

Feasibility Study on Dynamic Reactive Power Compensation Inhibiting the High Voltage Problem of Wind Power Collecting Area

When large scale wind farm integrates to weak power grid, high voltage will be shown after the short circuit fault. This will cause the wind turbine trip-off since the missing of high voltage ride through ability. Operating experi- ence shows that HVRT has become the main reason for the wind turbines to trip off the grid. Based on the above problem, this paper researches on the using of dynamic reactive power compensation to restrain the high voltage after short circuit fault. The SVC/SVG model with different dynamic response time is set up in the BPA program. The inhi- bition effect on the voltage is also analyzed of the different response time and capacity as well as different types of re- active power. The simulation result shows that appropriate capacity dynamic reactive power compensation with stand- ard required dynamic performance will significantly inhibit the high voltage after short circuit fault. This will improve the level of reactive voltage security of large scale wind farm collecting area.