交错并联H桥结构的独立式电压扰动发生器

Independent Voltage Disturbance Generator with Interleaved Parallel H-bridge Structure

为解决传统电压扰动发生器开关损耗高及控制精度低等问题,提出一种基于交错并联H桥的独立式电压扰动发生器的拓扑结构。整流部分采用一种改进的三相半桥不可控电路,逆变电路中基波模块采用交错并联H桥结构,高频模块采用单相H桥结构;通过引入下垂系数特性调整法及双闭环控制方法,降低了系统的开关损耗,提高了系统的动态响应能力和精确度,并利用仿真实验对所提方法进行验证与分析。仿真实验结果验证了所提拓扑结构和控制策略的可行性和有效性。

To solve the problems of the traditional voltage disturbance generator such as high switching loss and low control accuracy,a topology of independent voltage disturbance generator based on interleaved parallel H-bridges is proposed in this paper,whose rectifier part adopts an improved three-phase H-bridge uncontrollable circuit.Moreover,the fundamental wave module in the inverter circuit and the high-frequency module adopt an interleaved parallel H-bridge structure and a single-phase H-bridge structure,respectively.Through the introduction of the droop coefficient characteristic adjustment method and the double closed-loop control method,the system’s switching loss is reduced,and its dynamic response capability and accuracy are improved.In addition,simulation experiments are carried out to verify and analyze the proposed method,and results verify the feasibility and effectiveness of the proposed topology and the control strategy.