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1. (WO2018126822) CONTROL METHOD AND CONTROL SYSTEM FOR A DISTRIBUTED POWER SOURCE ENERGY GENERATION SYSTEM

Pub. No.:    WO/2018/126822    International Application No.:    PCT/CN2017/113582
Publication Date: Fri Jul 13 01:59:59 CEST 2018 International Filing Date: Thu Nov 30 00:59:59 CET 2017
IPC: H02J 1/12
H02M 3/335
Applicants: TSINGHUA UNIVERSITY
清华大学
Inventors: SUN, Kai
孙凯
LU, Yangjun
陆杨军
WU, Hongfei
吴红飞
Title: CONTROL METHOD AND CONTROL SYSTEM FOR A DISTRIBUTED POWER SOURCE ENERGY GENERATION SYSTEM
Abstract:
A control method and control system for a distributed power source energy generation system The distributed power supply energy generation system comprises N sub-isolated three-port converters and N independent distributed direct-current power sources corresponding to the N sub-isolated three-port converters on a one-to-one basis, wherein N is a natural number greater than 1; an input port of each of the sub-isolated three-port converters is connected to a corresponding distributed direct-current power source, two-way ports are connected in parallel so as to form a low-voltage direct-current bus-bar, and output ports are connected in series and then access a medium-voltage direct-current power distribution network. The control method comprises: the input power of each sub-isolated three-port converter is controlled independently; the two-way ports and the output ports use a virtual resistance-based power-voltage drop control strategy; stable control of the voltage of the two-way port of each sub-isolated three-port converter and voltage equalization control on the voltage of the output port of each sub-isolated three-port converter can be realized; modular design is achieved; and a feasible technical solution can be provided for the access of a distributed power source energy generation system into a medium-voltage direct-current power distribution network.