串并联多功能复合控制器拓扑结构研究

Topology Research of Series-parallel Multi-function Composite Controller

近年来,仿照交流FACTS的思想,提出了直流FACTS的概念,并系统地研究了直流电压补偿器、直流潮流控制器、直流故障限流器等直流FACTS装备及其在电网中的应用特性。为进一步提升直流FACTS装备的性价比,借鉴交流FACTS多功能复用的研究成果,提出了一种串并联接入直流线路的新型多功能复合控制器拓扑结构,使其同时具备电压补偿、潮流控制和故障限流阻断等多种功能。对多功能复合控制器的运行机理和主电路参数设计进行研究,同时仿真和实验验证了该拓扑在直流线路应用的可实现性。

In recent years, inspired by the idea from FACTS in AC system, concept of DC FACTS is put forward, and research and application of DC FACTS equipment for DC distributed network is discussed, such as DC voltage compensator, DC power flow controller, DC fault current limiter and so on. In order to further improve cost performance of DC FACTS devices, taking example from research results of AC FACTS multiplex, this paper aims at exploring a new structure for series-parallel multi-function composite controller in DC grid with multiple functions in power flow control, voltage compensation and fault current limiting. The working principle of the series-parallel multi-function composite controller is proposed and the main circuit parameter design method is described. Simulation model is built and simulation is performed, showing feasibility of the proposed topology.