摘要
随着不参与电网调频的变速风能变换系统(WECS)在电网中比例增大,系统频率调节成为重大问题。针对提出了一种新的方法优化了变速风能变换系统(WECS)在电网频率调节中的应用。首先对惯性控制进行改进,将调频功能加入到WECS中;再根据WECS短时间内可以一定范围内任意调节输出有功功率的特性进行改进,使WECS在频率暂态开始时起到更大的作用;然后,再使WECS与传统调频机组协调工作,弥补WECS只能短时支持频率调节的缺陷,使系统频率暂态恢复过程有功功率的注入更合理,减小了频率波动幅度,优化了WECS输出有功功率曲线,完成了WECS的转速恢复。最后给出仿真结果与分析。
As Wind Energy Conversion Systems, which don＇t join in grid frequency regulation, take a much more important part in power grid, frequency becomes a big problem. To solve this problem, we present a new method to improve Wind Energy Conversion Systems control strategy using in power grid frequency regulation. At first bases on inertial control it introduces frequency regulation to WECS. Then it improves inertial control with WECS＇s advantage, capable of changing its output active power arbitrarily within range in a short time, makes WECS contributes more in frequency transient＇s beginning. Finally it makes WECS cooperates with conventional generators, makes up disadvantage that WECS only can support frequency regulation in a short time, this will make power injection between frequency transient more reasonable, decrease the frequency fluctuation, optimize the WECS output active power curve and achieve rotor speed＇s recovery. At the end of the paper is simulations results and analysis.
出处
《计算机系统应用》
2012年第6期101-105,共5页
Computer Systems & Applications
