风电接入孤网后的频率控制策略  

Study of frequency control strategy after integration of wind power into isolated network

作　　者：刘林[1] 许晓艳[2] 

机构地区：[1]国网能源研究院,北京102209 [2]中国电力科学研究院,北京100192

出　　处：《电工电能新技术》2016年第6期49-53,共5页Advanced Technology of Electrical Engineering and Energy

基　　金：国家电网公司科技项目

摘　　要：由于风电场容量相对于孤网系统容量较大,且不具备传统发电机组的调频功能,风电出力的随机波动特性势必会引起孤网系统频率的显著波动,严重影响孤网中设备的安全稳定运行。在总结及阐述孤网概念及已有频率控制方式基础上,研究并建立抑制风电接入后频率大幅波动现象的孤网频率控制策略,包括三次和二次频率调节策略,其中,三次调频考虑风电场短期和超短期出力预测进行含风电的协调调度,二次调频根据系统频率以及风电场出力趋势对常规电源和风电出力进行秒级至分钟级的调整。最后,通过建立含风电的孤网动态仿真模型,仿真验证所提出控制策略的有效性。As wind farm＇s capacity is large,and it has no frequency adjustment capability as conventional generators,its output variation will lead to frequency fluctuation dramatically. Based on the conception of isolated network and its existed frequency control mode,this paper studies and establishes the frequency control strategy to inhibit high frequency phenomenon after wind power is integrated,including 3rd and 2nd frequency adjustment strategy.Finally,3rd frequency adjustment considers wind farm＇s short-term and super short-term prediction,and coordination scheduling is carried out. Based on system frequency and wind farm output,2nd frequency adjustment gives second level adjustment of conventional generator and wind farm. At last,by establishing the model of an isolated network containing a wind farm,the control strategy proposed is simulated and its validity is verified.

关 键 词：风电 孤网 频率稳定 控制策略 

分 类 号：TM732[电气工程—电力系统及自动化] TM614