风电场的功率波动对电网电压稳定性影响研究

Research on the Influences of Reactive Power Fluctuation of Wind Farm on the System Voltage Stability

由于风电场输出功率具有波动性和间歇性的特点,其并网运行必然会对电网电压稳定性造成影响。以某地区风电场为研究对象,分析了其功率波动对电网电压的影响。通过设置不同无功补偿装置人工(机械)投切电容、SVC和STAT-COM,应用PSCAD软件分析了其对改善电网电压的影响,通过对比不同情况下风电场出力从0%逐渐增至100%的各母线的电压变化曲线,得出不同补偿装置对电网电压稳定性的改善效果。

The integration of wind farm would cause a lot of influences to the grid due to its volatility and intermittent character, a regional wind farm is taken as the research subject in studying influences of wind farm integration on the grid voltage stability. The PSCAD platform is used to analyzes the voltage improvement effects of the manual （mechanical） switched capacitor, SVC, STATCOM and reactive power compensation device. By comparing the bus voltage curves under different conditions of wind farm output from 0 to 100%, the compensation effects of the above devices to the voltage stability is obtained.