大功率柔性互联设备的有功互济协调控制方法

针对以常规母联开关互联的交流电网线路变压器容量无法合理利用的问题,提出了依靠由背靠背电压源变流器组成的新型大功率柔性互联装置实现两侧交流电网有功功率互济的协调控制方法。介绍了新型柔性互联装置的拓扑结构与基本的控制原理,为实现两侧线路变压器容量合理的目标制定了一种生成有功功率参考的方法,并基于PSCAD/EMTDC搭建了一套仿真算例,对新型柔性互联装置的基本控制与所提出的有功互济的协调控制方法进行了验证。仿真结果表明,在柔性互联装置采用所提方法时能够实现两侧交流线路的有功功率互济,解决了线路变压器容量无法合理分配的问题。

Coordinated control method of active power cooperation for high power flexible interconnected equipment

In order to solve the problem that the capacity of line transformer in AC power network interconnected by conventional bus switch can not be utilized reasonably, a coordinated control strategy for active power of AC power grid on both sides was proposed, which relies on a new type of high-power flexible interconnection equipment composed of back-to-back voltage source converter. The topological structure and basic control principle of the flexible interconnection equipment were introduced, and a method of generating active power reference was developed to realize the reasonable capacity of the transformers on both sides of the line. Moreover, a simulation example was built based on PSCAD/EMTDC to verify the basic control of the flexible interconnection equipment and the proposed coordinated control method of active power cooperation. Simulation results show that when the flexible interconnection equipment adopts the proposed method, the cooperation of active power of AC lines on both sides can be realized, and the problem that the capacity of line transformer can not be allocated reasonably is solved.