一种MMC半全桥子模块拓扑

• Format: Patent
• Language: Chinese
• Published: 02.05.2025
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

本发明提供一种MMC半全桥子模块拓扑，本发明涉及模块化多电平换流器技术领域，本发明通过增加少量功率器件改进SFBSM内部开关器件与电容的连接方式，提出一种半全桥子模块拓扑结构，改进后的ISFBSM具备直流故障穿越、电容电压均衡与负电平输出能力。本发明提出一种具备直流故障穿越、电容电压自均衡与负电平输出能力的改进型半全桥子模块拓扑结构，通过添加快速故障清除模块，使SFBSM的直流故障清除速度提高了一倍，增加了输出电平数量，提高了系统的控制灵活性，此外，结合子模块电容并联运行的特点，ISFBSM可以不依赖于额外附加的控制手段，单纯通过硬件拓扑结构便可解决子模块电容电压均衡的问题。 The invention provides an MMC half-full-bridge sub-module topology, relates to the technical field of modular multilevel converters, and provides a half-full-bridge sub-module topology structure by increasing a small number of power devices to improve the connection mode of an internal switching device and a capacitor of an SFBSM. The improved ISFBSM has the capabilities of DC fault ride-through, capacitor voltage balance and negative level output. The invention provides an improved half-full-bridge sub-module topological structure with DC fault ride-through, capacitor voltage self-balancing and negative level output capabilities, by adding a rapid fault clearing module, the DC fault clearing speed of the SFBSM is doubled,