第 51 卷 第 18 期 電力系統(tǒng)保護與控制 Vol.51 No.18
2023 年 9 月16 日 Power System Protection and Control Sept. 16, 2023
DOI: 10.19783/j.cnki.pspc.230272
抑制間接矩陣變換器共模電壓的調(diào)制策略
馬星河 1,2,康志鵬 1
,趙軍營 1
,潘 玥 1
(1.河南理工大學電氣工程與自動化學院,河南 焦作 454003;
2.河南省煤礦裝備智能檢測與控制重點實驗室,河南 焦作 454003)
摘要:間接矩陣變換器在運行過程中會產(chǎn)生較大的共模電壓,對電機系統(tǒng)造成嚴重的電磁干擾,影響系統(tǒng)正常運
行。針對這一問題,提出一種新的空間矢量調(diào)制策略降低共模電壓大小,改善輸出電壓性能。首先,將整流級空
間矢量重新劃分區(qū)域,根據(jù)參考電流矢量所在區(qū)域選擇 3 個相鄰的有效電流矢量,將有效矢量下的平均直流母線
電壓維持在一個恒定值,保證整流級的最大輸出電壓。其次,逆變級采用無零矢量調(diào)制策略,通過使用 3 個有效
電壓矢量合成所需要的輸出電壓,將共模電壓峰值抑制到輸入相電壓幅值的 57.7%。與傳統(tǒng)調(diào)制策略相比,提出
的調(diào)制策略不僅可以減輕系統(tǒng)計算負擔,還可以減少系統(tǒng)輸入輸出諧波,改善輸入輸出波形質(zhì)量。最后,通過
Matlab/Simulink 和實驗平臺搭建相應模型,仿真和實驗結(jié)果驗證了所提出策略的有效性。
關鍵詞:間接矩陣變換器;共模電壓;空間矢量調(diào)制;整流級;參考電壓
Modulation strategy for suppressing the common-mode voltage of an indirect matrix converter
MA Xinghe1, 2, KANG Zhipeng1
, ZHAO Junying1
, PAN Yue1
(1. School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454003, China;
2. Henan Key Laboratory of Intelligent Detection and Control of Coal Mine Equipment, Jiaozuo 454003, China)
Abstract: An indirect matrix converter will generate a large common mode voltage during operation, causing serious
electromagnetic interference to the motor system and affecting the normal operation of the system. To address this issue, a
new space vector modulation strategy is proposed to reduce the size of the common mode voltage and improve output
voltage performance. First, the space vector of the rectifier stage is re-divided into regions, and three adjacent effective
current vectors are selected based on the region where the reference current vector is located. The average DC bus voltage
under the effective vector is maintained at a constant value to ensure the maximum output voltage of the rectifier stage.
Second, the inverter stage adopts a ‘no zero vector’ modulation strategy, which suppresses the common mode voltage
peak to 0.577 times the input phase voltage amplitude by synthesizing the required output voltage using three effective
voltage vectors. Compared with traditional modulation strategies, the proposed modulation strategy not only reduces the
computational burden of the system, but also reduces input and output harmonics, improving the quality of input and
output waveforms. Finally, a corresponding model is built using Matlab/Simulink and an experimental platform, and the
effectiveness of the proposed strategy is verified through simulation and experiment.
This work is supported by the National Natural Science Foundation of China (No. U1404522).
Key words: indirect matrix converter; common mode voltage; space vector modulation; rectifier side; reference voltage
0 引言
矩陣變換器(matrix converter, MC)被譽為“綠
色變頻器”,其具有正弦輸入/輸出電流波形、能量
雙向流動和輸入功率因數(shù)可調(diào)等優(yōu)點[1-5]。MC 根據(jù)
基金項目:國家自然科學基金項目資助(U1404522)
拓撲結(jié)構(gòu)可分為直接矩陣變換器(direct matrix
converter, DMC)和間接矩陣變換器(indirect matrix
converter, IMC)。相對于直接矩陣變換器,間接矩陣
變換器所需功率開關少,調(diào)制策略更加簡單,換流
方便,因而受到研究人員的廣泛關注[6-8]。
IMC 作為新型交?交型變換器,可以準確有效
地控制交流電機,在風力發(fā)電和驅(qū)動電機等領域