考虑调峰与电压要求的最优限风电调节速率算法  

An Algorithm for Optimally Regulating Wind Power Considering Peak-load Regulating and Voltage Requirements

作　　者：王尧[1] 王泽一[1] 郭健[1] 金海鑫[1] 

机构地区：[1]国网吉林省电力有限公司,长春130021

出　　处：《吉林电力》2016年第4期27-30,共4页Jilin Electric Power

摘　　要：当省级电网风电出力迅速增长,且火电已减至最小技术出力以下时,需应急调峰快速限风电,但对于电容器手动投切与STATCOM协同调压的大容量风电场升压站,过快的限风电速率将导致风电场高压侧电压高于合格范围,因此提出基于潮流计算的算法,求解适用于电网实际运行的最优限风电速率,以满足快速调峰与电压要求,先建立用于潮流计算的风电场节点模型,再通过各种限风电速率获取对应的电压曲线,从中分析选取最优限风电速率,最后采用修改后的IEEE-14节点系统作算例,利用求解结果,调度员可指定风电场的限风电速率,缩短风电场完成限风电指令的时长,并评估风电场内电容器检修对最优限风电速率的影响。When the wind power output of a provincial grid is rising rapidly as well as the thermal power output is below the minimum technical load, it is necessary to reduce wind power output quickly for peak-load regulating. However, the high voltage will exceed the limits of the acceptable voltage if the wind power output is reduced too fast, of which voltage is regulated by the operation of condensers and STATCOM. Therefore, a power flow calculation based algorithm is presented to compute the optimal reducing power rate for the practical operation of the grid, fulfilling the need of quick peak-load regulating and not violaging the limits of acceptable voltage. The bus model of the wind farm for power flow calculation is built, then the voltage curves corresponding to various reducing power rate are obtained. At last, the optimal reducing power rate can be analyzed and selected from the voltage curves. A case based on the revised IEEE-14 bus system is studied. The results can help the power dispatchers instruct the wind farm the reducing power rate to shorten the length of completing the reducing power order ,and evaluate the effect of capacitor maintenance in wind farm on optimal wind power regulation rate.

关 键 词：风电场升压站 限风电调节速率 调峰 电压 潮流计算 

分 类 号：TM614[电气工程—电力系统及自动化]