Title:
POWER OSCILLATION SUPPRESSION METHOD FOR DOUBLE-FED WIND TURBINE USING SUPER CAPACITOR ENERGY STORAGE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2016/119585
Kind Code:
A1
Abstract:
A power oscillation suppression method for a double-fed wind turbine using a super capacitor energy storage system, specifically comprising: connecting a super capacitor to a rotor side current transformer via a DC/DC interface circuit, the super capacitor and the rotor side current transformer of a double-fed wind turbine sharing a DC bus; and building an equivalent circuit. The equivalent circuit is a loop formed by connecting a capacitor Csc, a resistor Rres, an inductor L, a DC/DC interface circuit first switch and a capacitor Cdc in series sequentially, two ends of the capacitor Cdc being connected in parallel to a resistor R, a node between the inductor L and the DC/DC interface circuit first switch being a node A, a node between the capacitor Csc and the capacitor Cdc being a node B, and a DC/DC interface circuit second switch being connected between the node A and the node B. The method achieves the aims of not only effectively damping shaft system oscillation but also preventing the output power of the double-fed wind turbine from being influenced by damping power.
Inventors:
WANG NINGBO (CN)
DING KUN (CN)
ZHOU SHIYUAN (CN)
ZHANG CHEN (CN)
LI ZHENG (CN)
CAI XU (CN)
CAI YOUMING (CN)
HE SHIEN (CN)
LI JIN (CN)
LU LIANG (CN)
BAI NIANZONG (CN)
DING KUN (CN)
ZHOU SHIYUAN (CN)
ZHANG CHEN (CN)
LI ZHENG (CN)
CAI XU (CN)
CAI YOUMING (CN)
HE SHIEN (CN)
LI JIN (CN)
LU LIANG (CN)
BAI NIANZONG (CN)
Application Number:
PCT/CN2016/070532
Publication Date:
August 04, 2016
Filing Date:
January 09, 2016
Export Citation:
Assignee:
STATE GRID CORP CHINA (CN)
GANSU ELECTRIC POWER COMPANY OF STATE GRID (CN)
WIND POWER TECHNOLOGY CT OF GANSU ELECTRIC POWER COMPANY (CN)
UNIV SHANGHAI JIAOTONG (CN)
GANSU ELECTRIC POWER COMPANY OF STATE GRID (CN)
WIND POWER TECHNOLOGY CT OF GANSU ELECTRIC POWER COMPANY (CN)
UNIV SHANGHAI JIAOTONG (CN)
International Classes:
H02J3/24
Foreign References:
| CN104638661A | 2015-05-20 | |||
| CN103078339A | 2013-05-01 | |||
| CN103414205A | 2013-11-27 | |||
| CN101950973A | 2011-01-19 | |||
| JP2013158084A | 2013-08-15 |
Attorney, Agent or Firm:
SHENZHEN DINGYAN INTELLECTUAL PROPERTY AGENCY CO.,LTD (CN)
深圳市鼎言知识产权代理有限公司 (CN)
深圳市鼎言知识产权代理有限公司 (CN)
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