风力发电系统中SVG的应用研究

随着更多风电场接入电网和风电场规模不断扩大,风电特性对电网的负面影响愈来愈显著,主要问题包括并网功率因数不合格、电压偏差、电压波动、闪变以及电网安全稳定,而动态无功补偿装置在维持风电场并网点电压平衡,维持电力系统暂态稳定,改善电能质量等方面起着重要的作用。结合具体工程实践介绍动态无功补偿装置SVG的基本原理、控制方法、优缺点,同时分析SVG在风电场升压站设计中的注意事项及应用SVG之后电网电能质量的改善情况。

Study of the Application of SVG in Wind Power Generation System

With the increaseing of the number and enlargeing of the scale of wind farm,the negative effect of wind power for power network is more and more distinct,the main problems include disqualification of grid power factor,voltage deviation,voltage fluctuation,flicker and system stability.While dynamic reactive power compensation device plays an important role in maintaining network voltage balance and power system transient stability and improving electric energy quality.Combined with engineering practice this paper first introduces the basic principle,control methods,the advantages and disadvantages of SVG,then it expatiates the attentions in the design of wind farm station and the improvements in power quality after the application of SVG.