US 12,438,379 B2
Method and system for enhancing transient stability of power system with renewable energy
Guoteng Wang, Hangzhou (CN); Wentao Liu, Hangzhou (CN); Ying Huang, Hangzhou (CN); Yan Li, Guangzhou (CN); Baorong Zhou, Guangzhou (CN); Ye Zhang, Guangzhou (CN); Wangqianyun Tang, Guangzhou (CN); and Zheng Xu, Hangzhou (CN)
Assigned to ZHEJIANG UNIVERSITY, Hangzhou (CN); CHINA SOUTHERN POWER GRID CSG ELECTRIC POWER RESEARCH INSTITUTE, Guangzhou (CN); and China Southern Power Grid Co., Ltd., Guangzhou (CN)
Filed by ZHEJIANG UNIVERSITY, Hangzhou (CN); and CHINA SOUTHERN POWER GRID CSG ELECTRIC POWER RESEARCH INSTITUTE, Guangzhou (CN)
Filed on Oct. 23, 2024, as Appl. No. 18/924,276.
Application 18/924,276 is a continuation of application No. PCT/CN2024/109262, filed on Aug. 1, 2024.
Prior Publication US 2025/0047103 A1, Feb. 6, 2025
Int. Cl. H02J 3/40 (2006.01); G01R 31/52 (2020.01)
CPC H02J 3/40 (2013.01) [G01R 31/52 (2020.01); H02J 2203/20 (2020.01)] 7 Claims
OG exemplary drawing
 
1. A method for enhancing transient stability of a renewable energy power system, comprising:
(1) constructing an external subsystem corresponding to the renewable energy power system; and constructing a first matrix corresponding to the external subsystem based on voltage control; wherein the first matrix is a matrix expression of the external subsystem under an ideal voltage control condition;
(2) generating a second matrix corresponding to the renewable energy power system; and constructing a transient stability Lyapunov function corresponding to the renewable energy power system in real time based on the first matrix and the second matrix; wherein the second matrix is a matrix expression of the external subsystem under an actual voltage control condition; and
(3) generating a first control signal corresponding to the renewable energy power system based on Lyapunov's second method; and detecting, by at least one sensor of the renewable energy power system, a deviation of an output voltage from a predetermined threshold, and adjusting, by a control system of an inverter, a voltage reference value of the inverter in real time based on the first control signal, thereby controlling and enhancing transient stability of the renewable energy power system; wherein the first control signal is an adaptive voltage control signal of the renewable energy power system.