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1. (WO2017148252) CONTROL METHOD AND CONTROL SYSTEM FOR ENHANCING ENDURANCE TO ANOMALOUS VOLTAGE FOR DOUBLY-FED INDUCTION GENERATOR

Pub. No.:    WO/2017/148252    International Application No.:    PCT/CN2017/073115
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Thu Feb 09 00:59:59 CET 2017
IPC: H02J 3/38
Applicants: WIND POWER TECHNOLOGY CENTER OF GANSU ELECTRIC POWER COMPANY
甘肃省电力公司风电技术中心
STATE GRID CORPORATION OF CHINA
国家电网公司
GANSU ELECTRIC POWER COMPANY OF STATE GRID
国网甘肃省电力公司
SHANGHAI JIAO TONG UNIVERSITY
上海交通大学
Inventors: WANG, Ningbo
汪宁渤
LU, Liang
路亮
DING, Kun
丁坤
ZHOU, Shiyuan
周识远
ZHANG, Chen
张琛
LI, Jin
李津
LI, Zheng
李征
BAI, Nianzong
摆念宗
ZHI, Jing
陟晶
CAI, Xu
蔡旭
CAI, Youming
蔡游明
Title: CONTROL METHOD AND CONTROL SYSTEM FOR ENHANCING ENDURANCE TO ANOMALOUS VOLTAGE FOR DOUBLY-FED INDUCTION GENERATOR
Abstract:
The present invention relates to a control method and system for enhancing endurance to an anomalous voltage for a doubly-fed induction generator. The method comprises: providing a doubly-fed induction generator connected to a power grid, wherein the doubly-fed induction generator comprises a supercapacitor energy storage device including a DC-DC converter and a supercapacitor, and the supercapacitor is electrically connected to a direct current busbar via the DC-DC converter; detecting a power grid voltage, and determining whether the power grid voltage indicates a fault; if the power grid voltage is determined to indicate a fault, then detecting the voltage of the direct current busbar, and determining whether the voltage of the direct current busbar exceeds a limit value; if the voltage of the direct current busbar is determined as exceeding the limit value, then performing, on the basis of an abnormal operating condition mode, coordinated control for an integrated system on the supercapacitor energy storage device and a current transformer; and if the power grid voltage is determined to restore to within a normal range, then performing, on the basis of a normal operating condition mode, coordinated control for an integrated system on the supercapacitor energy storage device and the current transformer.