摘要
当前国际风电界相继提出各种风电系统并网规范,要求并网风电机组在电网出现一定的电压跌落、不平衡、谐波畸变、频率漂移、相角跳变等故障情况下仍能与电网保持连接而不解列。为了研究和测试风电机组的故障穿越运行能力,需要设计各种特殊的试验电源装置以模拟各类电网故障。本文就此提出了一种新型可编程电网故障模拟电源的设计方案,能够较为完整地模拟风电并网规范中要求的各类电网故障。实验结果表明该装置操作简单、灵活可靠,故障种类齐全,故障参数柔性可调,且拓展性强,可作为风电机组及其他电力电子设备出厂性能考核的重要测试装置。
Recently,grid codes are proposed by many countries all over the world,which require that grid-connected wind turbines should possess fault-ride through capability,This means when the grid fault occurs,such as voltage dip,unbalance,harmonic distortion,frequency drift,phase angle jumping and so on,the wind turbines must be connected with the grid without jumping.In order to investigate the fault-ride through capability of wind generators,a special testing power supply is essential to simulate various grid faults assigned in the grid codes.For this purpose,this paper proposes a new programmable grid-fault emulating power supply,which can emulate almost all kinds of network faults listed in the grid codes.Experimental results validate the simplicity,flexibility and high reliability of the structure and control strategies,which indicate that the types and parameters of the simulated grid faults are adjustable and the functions of the device can be further expanded.It comes out that the programmable fault-emulating power supply can be widely used in the performance test of wind turbines and other electric devices.
出处
《电工技术学报》
EI
CSCD
北大核心
2012年第10期91-97,共7页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(50907057)
