基于STM32分布控制的级联H桥STATCOM设计

针对目前级联H桥STATCOM存在的结构的冗余度较低;采用IGBT时成本较高;控制系统与触发系统的电源较为复杂;系统信息传递由于隔离的需要,必须选用光纤通信,研究并设计了一款基于STM32分布控制的级联H桥STATCOM装置。文中介绍了该装置基本拓扑结构与控制系统的实现原理;采用低次谐波最小法原则计算出每个H桥中MOSFET的开通关断时间,实现拟合正弦波输出。分布控制部分由STM32系列芯片作为控制芯片,控制各H桥的触发、信息采集并将信息传递给作为主机的DSP芯片;在EMTP电力系统电磁暂态分析仿真软件中搭建了12H桥级联的仿真模型,仿真结果表明了设计的正确性和可靠性。另外,还设计了12H桥级联STATCOM的实验装置,该装置实现了设计功能,验证了文章内容的可行性。

Design of Cascade H - bridge STATCOM Device Based on STM32 Distribution Control

For the current cascade H bridge STATCOM the structure of the redundancy is low; the cost of using IGBT higher; control system and trigger system power supply is more complex; system information transmission due to isolation needs, must use optical fiber communication, research and design A STATCOM 32-based distributed control of the cascaded H bridge STATCOM device. In this paper, the basic topology of the device and the realization principle of the control system are introduced. The turn-off time of the MOSFET in each H-bridge is calculated by the principle of low-order harmonic method, and the sine wave output is realized. Distributed control part of the STM32 series chip by STMicroelectronics as a control chip to control the trigger of each H bridge, information collection and information transmitted to the host as the DSP chip; EMTP power system in the electromagnetic transient analysis software to build a 12H Bridge cascade simulation model, the simulation results show the design of the correctness and reliability. In addition, the experimental device of 12H bridge cascade STATCOM is designed, which realizes the design function and verifies the feasibility of the article content.#$NLKeywords: Cascade H bridge, STM32, Distributed control, STATCOM;