Title:
METHOD FOR OPERATING WIND FARM IN ISLANDING MODE AND CONTROL SYSTEM THEREFOR
Document Type and Number:
WIPO Patent Application WO/2016/115662
Kind Code:
A1
Abstract:
A method and a control system thereof for operating a wind farm in islanding mode are provided, wherein: the wind farm (1) includes a plurality of wind turbines (10-15, 20-25, 30-35), a DC collection network (50, 51, 52) and a substation (4); each the wind turbine (10-15, 20-25, 30-35) includes a generator (100-150, 200-250, 300-350) with a rectifier (101-151, 201-251, 301-351) and a wind turbine auxiliary equipment (102-152, 202-252, 302-352); the DC collection network (50, 51, 52) includes a positive pole cable (50p, 51p, 52p) and a negative pole cable (50n, 51n, 52n) which are electrically connectable to an DC output of the rectifier (101-151, 201-251, 301-351) and the DC input of the wind turbine auxiliary equipment (102-152, 202-252, 302-352) of each the wind turbine(10-15, 20-25, 30-35); the substation (4) includes a substation auxiliary equipment (3) and a DC power source (9) whose DC output is electrically connectable to the positive pole cable (50p, 51p, 52p) and the negative pole cable (50n, 51n, 52n) of the DC collection network (50, 51, 52); a wind farm auxiliary equipment includes the substation auxiliary equipment (3) and/or the wind turbine auxiliary equipment (102-152, 202-252, 302-352). The method includes: selecting a group of the plurality of wind turbines (10-15, 20-25, 30-35); choosing the DC power source (9) as a first power source; choosing the selected wind turbine group as a second power source; activating the selected wind turbine; closing the electrical connection between the DC collection network (50, 51, 52) and the DC input of the wind farm auxiliary equipment; closing the electrical connection between the DC collection network (50, 51, 52) and the DC output of the rectifier (101-151, 201-251, 301-351) of each the selected wind turbine; closing the electrical connection between the DC collection network (50, 51, 52) and the DC power source (9) of the substation (4); one of the first power source and the second power source supply DC power in V control mode so that the DC voltage between the positive pole cable (50p, 51p, 52p) and the negative pole cable (50n, 51n, 52n) of the DC collection network (50, 51, 52) is kept in a predetermined voltage range and the other of the first power source and the second power source supply DC power in P control to the wind farm auxiliary equipment via the DC connection network (50, 51, 52). The method and control system according to the invention thus provide an efficient and cheap way of separating power control and voltage control to two sorts of emergency power sources so that both of active power balancing among the emergency power source and power consumers, and DC voltage stabilization at the DC collection network (50, 51, 52) are achieved.
Inventors:
CHEN YAO (CN)
HUANG XING (CN)
HUANG XING (CN)
Application Number:
PCT/CN2015/071012
Publication Date:
July 28, 2016
Filing Date:
January 19, 2015
Export Citation:
Assignee:
ABB TECHNOLOGY LTD (CH)
CHEN YAO (CN)
HUANG XING (CN)
CHEN YAO (CN)
HUANG XING (CN)
International Classes:
H02J3/38; F03D9/00
Foreign References:
| EP2236821A1 | 2010-10-06 | |||
| CN103890385A | 2014-06-25 | |||
| CN104137376A | 2014-11-05 | |||
| CN103140670A | 2013-06-05 |
Attorney, Agent or Firm:
BOSS & YOUNG PATENT AND TRADEMARK LAW OFFICE (Tower A Bldg. No. 1, GT International Center,,Jia 3 Yongandongli, Jianguomenwai Avenue, Chaoyang District, Beijing 2, CN)
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