Title:
LOW-CAPACITIVE-REACTANCE PROTECTION METHOD AND SYSTEM, AND COMPUTER-READABLE STORAGE MEDIUM AND COMPUTER PROGRAM PRODUCT
Document Type and Number:
WIPO Patent Application WO/2022/183885
Kind Code:
A1
Abstract:
Provided in the embodiments of the present invention are a low-capacitive-reactance protection method and system, and a computer-readable storage medium and a computer program product. The method comprises: acquiring sampling values of a three-phase current and voltage of a line, and with regard to the sampling values, determining a phasor value of the three-phase current and a phasor value of the voltage; determining a ground capacitive reactance according to a ratio; determining a low-capacitive-reactance protection action area according to a line impedance parameter, and determining a key constant value in the low-capacitive-reactance protection action area; performing amplitude compensation or soft compensation; and after the amplitude compensation or the soft compensation is performed, when the ground capacitive reactance enters the low-capacitive-reactance protection action area and the amplitude of the sum of current phasors on two sides meets a current multi-point confirmation criterion, performing a low-capacitive-reactance protection action on the line. The method of the present invention has a simple principle; and by means of the method, a line fault can be accurately and quickly identified, thereby improving the reliability of line protection.
Inventors:
ZHOU ZEXIN (CN)
GUO YARONG (CN)
LIANG YING (CN)
YANG GUOSHENG (CN)
WANG XINGGUO (CN)
DU DINGXIANG (CN)
CAO HONG (CN)
WANG SHUYANG (CN)
GUO YARONG (CN)
LIANG YING (CN)
YANG GUOSHENG (CN)
WANG XINGGUO (CN)
DU DINGXIANG (CN)
CAO HONG (CN)
WANG SHUYANG (CN)
Application Number:
PCT/CN2022/075394
Publication Date:
September 09, 2022
Filing Date:
February 07, 2022
Export Citation:
Assignee:
CHINA ELECTRIC POWER RES INST (CN)
International Classes:
H02H7/26; H02J3/12
Foreign References:
| CN113131447A | 2021-07-16 | |||
| CN101320911A | 2008-12-10 | |||
| CN101593970A | 2009-12-02 | |||
| CN101741070A | 2010-06-16 | |||
| US20170227595A1 | 2017-08-10 |
Attorney, Agent or Firm:
CHINA PAT INTELLECTUAL PROPERTY OFFICE (CN)
Download PDF: