Open AccessCritical receiving power ratio of the receiving system in asynchronously connected power systems based on voltage response analysis
Author(s) -
Song Pengcheng,
Xu Zheng,
Huang Hongyang
Publication year - 2016
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2015.1023
Subject(s) - electric power system , fault (geology) , limit (mathematics) , voltage , control theory (sociology) , power (physics) , computer science , sensitivity (control systems) , engineering , electronic engineering , mathematics , electrical engineering , control (management) , physics , mathematical analysis , quantum mechanics , artificial intelligence , seismology , geology
The objective of this study is to determine the critical receiving power ratio (CRPR) of a receiving system fed only by high‐voltage DC transmission lines. The approach is to check the voltage response when a severe fault occurs in a simplified asynchronously connected receiving system. The DC power limit is found by continuously increasing the DC power until the voltage cannot recover from the severe fault. The topic is expanded as follows. First, a simplified system model is established under a few reasonable assumptions. Then, the analytical voltage response expressions when a three‐phase short‐circuit fault occurs are developed, taking the effect of commutation failure, fast AC voltage control and load characteristics into consideration. The expressions of the DC power limits under different load characteristics are deduced from the analytical voltage response expressions. Besides, several crucial factors that limit the infeed power capacity of an asynchronously connected receiving system are discussed in this study based on the sensitivity analysis of the DC power limits. The CRPRs of a receiving system with different crucial characteristics are found through time‐domain simulation with detailed models. The validity of the analytical voltage response expressions and the crucial factor analysis is well proved by the simulation results.