随着国家政策对环保型、可再生能源利用及能源开发方面的倾斜,以及风电并网技术的不断提高,风电装机规模迅猛增长,对风电开发由分散式开发转化为集中式开发. 但规模化风电接入给电网运行带来许多问题,如电压控制、短路电流、设备选型等问题. 规模化风电集中接入,将对系统提供一定的短路电流,影响设备选型、升压站中低压侧的运行方式等,从而制约风电的集中开发建设. 因此通过对不同风电机组型号(双馈式和直驱式)及不同容量的单个风电机组对系统提供的短路电流分析,根据风电机组短路PMU录波曲线和风电机组模型短路仿真曲线,提出了一种工程计算方法,计算出不同型号和不用容量的风电机组次暂态电抗,进而建立风电场短路电流计算模型,分析一个风电场对系统提供的短路电流. 为风电场及风电汇集站的规划设计和设备选型提供了重要的参考依据.%With the inclination of national policy on environmental protection , renewable energy utilization and energy develop-ment, and the constant improvement of wind power technology , the installed capacity of wind power grows rapidly , and the de-velopment of wind power is changed from the distributed development to the centralized development .But large-scale wind power integration brings many problems to the operation of power grid , such as voltage control , short-circuit current , equip-ment selection etc .The centralized integration of large -scale wind power will provide a certain short -circuit current , influ-ence the equipment selection and operating mode in mid -voltage side and low -voltage side of booster station , thereby it con-strains the concentrated development and construction of wind power .Therefore, through the short -circuit current analysis supplied by a single wind turbine with different wind turbine models ( double-fed and direct-drive) and different capacity , an engineering calculation method is proposed based on short -circuit PMU recorded wave curve of wind turbine and short -circuit simulation curve of wind turbine model .It can calculate the subtransient reactance of wind turbines with different mod-els and capacity , thereby the calculation model of short -circuit current for wind farms is established to analyze the short -cir-cuit current supplied by a wind farm to the system .It provides an important reference for the planning , design and equipment selection of wind farms and wind power collecting stations .
展开▼
