Title:
METHOD AND SYSTEM FOR ESTIMATING VOLTAGE SUPPORT STRENGTH OF NEW ENERGY GRID-CONNECTED SYSTEM, AND STORAGE MEDIUM AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/103935
Kind Code:
A1
Abstract:
Disclosed in the present invention are a method and system for estimating a voltage support strength of a new energy grid-connected system. The method comprises: determining a first short-circuit ratio index of a new energy grid-connected system on the basis of a short-circuit capacity, which is provided for a grid connection point by an alternating-current system in the new energy grid-connected system, and an equivalent grid connection capacity of new energy at the grid connection point; determining a second short-circuit ratio index of the new energy grid-connected system on the basis of a voltage variation at a position where the new energy is connected to the grid connection point; determining a critical short-circuit ratio of the new energy grid-connected system on the basis of a parameter of the alternating-current system and an equivalent maximum transmission power, which is transmitted to the alternating-current system by the new energy; and on the basis of the first short-circuit ratio index, the second short-circuit ratio index and the critical short-circuit ratio and by using a preset voltage support strength estimation rule, determining a voltage support strength that is provided by the new energy grid-connected system at the grid connection point.
Inventors:
SUN HUADONG (CN)
YU LIN (CN)
ZHAO BING (CN)
XU SHIYUN (CN)
YU LIN (CN)
ZHAO BING (CN)
XU SHIYUN (CN)
Application Number:
PCT/CN2022/136472
Publication Date:
June 15, 2023
Filing Date:
December 05, 2022
Export Citation:
Assignee:
CHINA ELECTRIC POWER RES INST (CN)
International Classes:
H02J3/38
Foreign References:
| CN113904375A | 2022-01-07 | |||
| CN112260326A | 2021-01-22 | |||
| CN111082450A | 2020-04-28 | |||
| CN111507572A | 2020-08-07 | |||
| CN112564175A | 2021-03-26 | |||
| US20190131795A1 | 2019-05-02 |
Attorney, Agent or Firm:
CHINA PAT INTELLECTUAL PROPERTY OFFICE (CN)
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