基于风电场继电保护数字-物理动模闭环仿系统设计

Development of digital-physical closed loop dynamic simulation system for wind farm relay protection

文章研发了基于风电场并网的继电保护数字-物理动模闭环仿真系统检验平台,平台采用DDRTS电磁暂态仿真软件编程实现了对风电场电流实测数据进行波形动态回放的功能,同时利用仿真软件搭建了直驱、双馈风电机组模块,计算其风电场并网系统保护定值。构建了含微机保护装置、模拟断路器的硬件模拟系统,通过DDRTS输入输出连接完成闭环实时仿真系统。应用某地区风电并网系统对该动模仿真系统平台进行了试验验证,结果表明其能够进行正确检验。

Whether the original relay protection criterion or new criterion established for the grid with wind farms in it can diagnose fault with the grid ought to be tested when wind farms are connected to the grid, and the existing test methods are supposed to be improved. A digital-physical closed loop dynamic simulation platform is developed for wind farm relay protection in this article. The test platform consists of mathematical model in which dynamic waveform playback simulates fault data output; PSCAD estab- lishes direct-drive and double-fed wind turbine module; PSASP calculates protection setting values, and physical model in which a computer protection device, a scale analog circuit breaker etc. are in-eluded. I/O signals between mathematical model and physical model complete a closed-loop real-time simulation system. The platform has been tested in a regional wind farm, the results show that it can di-agnose fault well.