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Digital realization method of power electronic nonlinear load(PDF)

[ISSN:1007-449X/CN:23-1 408/TM]

Issue:
2016年05
Page:
7-13
Research Field:
Publishing date:

Info

Title:
Digital realization method of power electronic nonlinear load
Author(s):
SONG Peng-xian12 LI Yao-hua1 WANG Ping1 SU Zhao-yang1 WANG Song1
 ( 1. Key Laboratory of Power Electronics and Electric Drive,Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China; 2. Electric Power Research Institute,State Grid Tianjin Electric Power Company,Tianjin 300384,China)
Keywords:
power electronic load load simulation algorithm three-phase uncontrolled rectifier bridge proportional resonant controller stationary frame
PACS:
TM 46
DOI:
10. 15938 / j. emc. 2016. 05. 002
Abstract:
Aiming at the problem that the nonlinear load simulation algorithm of power electronic load is complex and low accuracy,a novel digital implementation method was presented. According to the rela-tions between the input voltage instantaneous value of three-phase uncontrolled rectifier bridge and DC voltage,as well as diode conduction conditions,the decision conditions of seven working stages were got. The differential equation of different working stages was solved using backward difference method to get the input current of three-phase uncontrolled rectifier bridge. The results were as the command signals of the current loop control of simulation converter in αβ coordinate and resonant controller was used to track the reference current in the static coordinate. Simulation and experimental results show that the proposed method simulates three-phase uncontrolled rectifier bridge with the characteristics of simple calculation, fast response and high accuracy.

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Last Update: 2016-06-26