过电流
限流
过电压
控制理论(社会学)
网格
故障电流限制器
瞬态(计算机编程)
工程类
电压
电力系统
计算机科学
电气工程
功率(物理)
电子工程
控制(管理)
物理
几何学
数学
量子力学
人工智能
操作系统
作者
Bo Fan,Teng Liu,Fangzhou Zhao,Heng Wu,Xiongfei Wang
标识
DOI:10.1109/ojpel.2022.3227507
摘要
Grid-forming (GFM) inverters are recognized as a viable solution to increase the penetration of renewable energy in bulk power systems. However, they are physically different from synchronous generators in terms of overcurrent capability. To protect the power semiconductor devices and support the power grid under severe symmetrical disturbances, the GFM control systems should be able to achieve the following requirements: current magnitude limitation, fault current contribution, and fault recovery capability. Various current-limiting control methods are reported in the literature to fulfill these goals, including current limiters, virtual impedance, and voltage limiters. This paper presents an overview of those methods. Emerging challenges that need to be addressed, including temporary overcurrent, unspecified output current vector angle, undesired current saturation, and transient overvoltage, are pointed out. Comparative simulations are conducted to demonstrate the performance of different methods under grid voltage drops and phase jumps. Finally, open issues of current-limiting control methods for GFM inverters, including transient stability assessment, voltage source behavior under overcurrent conditions, and windup of voltage controllers, are shared.
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