[1]王璐琤,何栋林,张风江.供电电网对电压源型变频器运行的影响研究[J].控制与信息技术(原大功率变流技术),2017,(06):61-66.[doi:10.13889/j.issn.2095-3631.2017.06.013]
 WANG Lucheng,HE Donglin,ZHANG Fengjiang.Research on the Influence of Power Grid on the Operation of Voltage Source Inverter[J].High Power Converter Technology,2017,(06):61-66.[doi:10.13889/j.issn.2095-3631.2017.06.013]
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供电电网对电压源型变频器运行的影响研究()
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《控制与信息技术》(原《大功率变流技术》)[ISSN:2095-3631/CN:43-1486/U]

卷:
期数:
2017年06期
页码:
61-66
栏目:
电力系统
出版日期:
2017-12-05

文章信息/Info

Title:
Research on the Influence of Power Grid on the Operation of Voltage Source Inverter
文章编号:
2095-3631(2017)06-0061-6
作者:
王璐琤何栋林张风江
(上海辛格林纳新时达电机有限公司,上海 201800)
Author(s):
WANG Lucheng HE Donglin ZHANG Fengjiang
(Shanghai Sigriner STEP Electric Co.,Ltd., Shanghai 201800 ,China)
关键词:
电网不平衡度线路阻抗无功补偿并联谐振零序分量
Keywords:
unbalance factor of power grid line impedance reactive power compensation parallel resonance zero sequence component
分类号:
TN773
DOI:
10.13889/j.issn.2095-3631.2017.06.013
文献标志码:
A
摘要:
针对变频器频繁出现三相输入电流不平衡、内部器件因为过压或过流而损坏的现象,文章从低频和功率角度出发,分析了电网不平衡度、线路阻抗及多路负载对电压源型变频器工作特性影响的机理,指出电网负序分量会引起输入电流不平衡,导致低频谐波电流增大,严重时会致使器件烧毁;线路阻抗影响系统串并联谐振频率、变频器输入电压及其输入感性电流比例,是引起系统谐振、导致器件过压击穿的重要因素之一;多台变频器同时工作时能起到抑制谐波电流的作用,文中通过理论计算、仿真和实测数据证明了该观点的正确性。文中还提出了一些能帮助变频器的设计者和使用者规避应用风险的措施,提高变频器工作的稳定性。
Abstract:
Three-phase input current unbalance is often happened in inverters, which causes devices damaged by overvoltage or over-current. Influences of grid unbalance, line impedance and multi-load on voltage source inverter and their mechanisms were analyzed from the point view of low frequency and power. It presented that three-phase input current unbalance is caused by negative sequence components of grid voltage and makes low frequency harmonic current increased and even devices damaged in inverter. The fact that line impedance affects serial or parallel frequency, input voltage and proportion of input inductive current was pointed out, which is one of the important factors causing the system resonant and devices breakdown by overvoltage. It also proposed that multi-inverter operation would suppress harmonic input currents and the results of theoretical calculation, simulation and practical test showed the correctness of the view point. Moreover, it presented some relative measures, and this can help designers and users to avoid application risks of inverters and improve the stability of the machines.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2017-08-01
作者简介:王璐琤(1988-),男,硕士,主要从事低压大功率变频器、高压变频器的研究和设计工作。
更新日期/Last Update: 2017-12-18