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Title:
ONLINE EVALUATION METHOD OF SAFETY MARGIN OF OPERATING RESERVE IN POWER SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/092527
Kind Code:
A1
Abstract:
Disclosed is an online evaluation method of a safety margin of an operating reserve in a power system, which belongs to the technical field of power system operation and control. A post-fault steady operation state of the system is obtained by considering protection and through time-domain simulation of action of an automatic safety device, and active power sensitivity of the operating reserve for power transmission equipment and a power transmission corridor is calculated based on a direct-current (DC) power flow equation of the state. A maximum capacity of the operating reserve that is useful for actual control of a steady state frequency is obtained by solving an optimization function considering a controllable interval of the operating reserve, an overload limit of the power transmission equipment and a safety and stability limit of the power transmission corridor, and aiming at maximizing the operating reserve. A maximum controllable quantity of the steady state frequency is calculated in combination with power and frequency static characteristic coefficients, achieving online evaluation of a safety margin of the operating reserve taking faults into consideration.

Inventors:
XU TAISHAN (CN)
WANG JIFENG (CN)
TANG ZHUOYAO (CN)
BAO YANHONG (CN)
HUANG HE (CN)
SU YINSHENG (CN)
ZHENG LIANG (CN)
LIU SHAOFENG (CN)
REN XIANCHENG (CN)
ZHOU HAIFENG (CN)
Application Number:
PCT/CN2016/103729
Publication Date:
June 08, 2017
Filing Date:
October 28, 2016
Export Citation:
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Assignee:
NARI TECHNOLOGY CO LTD (CN)
CHINA SOUTHERN POWER GRID COMPANY LTD (CN)
NARI GROUP CORP (CN)
International Classes:
H02J3/00
Foreign References:
CN105656024A2016-06-08
CN102623990A2012-08-01
CN104578048A2015-04-29
CN103762590A2014-04-30
CN103715721A2014-04-09
JPH10290528A1998-10-27
Other References:
MA, MING ET AL.: "On-Line Auxiliary Decision-Making for Overload Control of Power Transmission Equipment and Sections", POWER SYSTEM AND CLEAN ENERGY, vol. 31, no. 6, 30 June 2015 (2015-06-30)
Attorney, Agent or Firm:
NANJING ZHISHI LAW FIRM OF INTELLECTUAL PROPERTY (CN)
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