一种可在特高压或风电大量接入后减少旋转备用的新方法  

A new approach to decrease reserve demand when bulky wind power or UHV is connected

作　　者：郭为民[1] 魏强[1] 唐耀华[1] 

机构地区：[1]国网河南省电力公司电力科学研究院,河南郑州450052

出　　处：《电力系统保护与控制》2014年第7期1-7,共7页Power System Protection and Control

摘　　要：由于风电和火电机组相比更加多变,难以预测,增加风电的注入水平一般会需要更多的旋转备用,这会增加成本。调压辅助调频有助于改善这一问题。当风电出力突然大幅度下降导致频率下降时,可以通过调低负荷电压来减少有功需求、提高事故后电网频率,然后再通过AGC将频率恢复到正常水平。在指定允许的LOLP或LOLE时,可以通过概率计算得到这种方法减少的旋转备用数量。调压辅助调频也可在特高压接入后节省需要的旋转备用。仿真计算证明了该方法的有效性。Since wind power is more versatile and unpredictable than traditional thermal power, increasing wind penetration level generally needs more spinning reserve, which is not economical. Frequency related voltage control can be helpful to solve this problem. When frequency becomes lower due to a sudden sharp decrease of wind farm output, load voltage can be lowered to decrease the demand of active power and improve the grid frequency after the accident. And then AGC is adopted to restore frequency to normal level. Given the loss of load probability （LOLP） or loss of load expected （LOLE）, the quantity of spinning reserve can be obtained by probability calculation. This method can also be used when large generation （like 1000 kV UHV line） is lost to avoid load shedding. Simulation also validates the effectiveness of this method.

关 键 词：频率控制 旋转备用 风电 特高压 电压降低 

分 类 号：TM614[电气工程—电力系统及自动化]