弱电网下电压源型逆变器锁相环的改进
TM464; 弱电网并网运行时会产生谐波干扰以及电网电压频率波动等问题,导致逆变器输出电流谐波失真.弱电网并网环境对锁相环(Phase Locked Loop,PLL)的性能提出了更高的要求.针对弱电网下并网逆变器的控制要求,在分析并网电压源型逆变器(Voltage Source Converter,VSC)控制模型基础上,提出一种弱电网下PLL的优化方案.该方案采用超前补偿器补偿平均滑动滤波器(Moving Average Filtering,MAF)的相位延迟以提高系统的动态响应;引入前馈频率估计环,提高系统在电网电压频率偏差较大时的锁相精度,仿真验证改进的PLL的有效性.建立并网VSC系...
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| Published in | 电测与仪表 Vol. 59; no. 3; pp. 187 - 194 |
|---|---|
| Main Authors | , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
河北工业大学省部共建电工装备可靠性与智能化国家重点实验室,天津300130
15.03.2022
河北省电磁场与电器可靠性重点实验室,天津300130 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-1390 |
| DOI | 10.19753/j.issn1001-1390.2022.03.026 |
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| Abstract | TM464; 弱电网并网运行时会产生谐波干扰以及电网电压频率波动等问题,导致逆变器输出电流谐波失真.弱电网并网环境对锁相环(Phase Locked Loop,PLL)的性能提出了更高的要求.针对弱电网下并网逆变器的控制要求,在分析并网电压源型逆变器(Voltage Source Converter,VSC)控制模型基础上,提出一种弱电网下PLL的优化方案.该方案采用超前补偿器补偿平均滑动滤波器(Moving Average Filtering,MAF)的相位延迟以提高系统的动态响应;引入前馈频率估计环,提高系统在电网电压频率偏差较大时的锁相精度,仿真验证改进的PLL的有效性.建立并网VSC系统实验平台对文中所述改进方法进行验证.实验结果表明,经PLL改进后的VSC系统在弱电网条件下具有良好的鲁棒性,逆变器入网电能质量得到了保证. |
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| AbstractList | TM464; 弱电网并网运行时会产生谐波干扰以及电网电压频率波动等问题,导致逆变器输出电流谐波失真.弱电网并网环境对锁相环(Phase Locked Loop,PLL)的性能提出了更高的要求.针对弱电网下并网逆变器的控制要求,在分析并网电压源型逆变器(Voltage Source Converter,VSC)控制模型基础上,提出一种弱电网下PLL的优化方案.该方案采用超前补偿器补偿平均滑动滤波器(Moving Average Filtering,MAF)的相位延迟以提高系统的动态响应;引入前馈频率估计环,提高系统在电网电压频率偏差较大时的锁相精度,仿真验证改进的PLL的有效性.建立并网VSC系统实验平台对文中所述改进方法进行验证.实验结果表明,经PLL改进后的VSC系统在弱电网条件下具有良好的鲁棒性,逆变器入网电能质量得到了保证. |
| Author | 刘国鑫 李占凯 张福民 牛运腾 王静茹 |
| AuthorAffiliation | 河北工业大学省部共建电工装备可靠性与智能化国家重点实验室,天津300130;河北省电磁场与电器可靠性重点实验室,天津300130 |
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| Author_FL | Liu Guoxin Zhang Fumin Li Zhankai Niu Yunteng Wang Jingru |
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| DocumentTitle_FL | Improvement of phase locked loop of voltage source converter in weak grid |
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| Keywords | 弱电网;电压源型逆变器;锁相环;超前补偿器;前馈频率估计 |
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| Publisher | 河北工业大学省部共建电工装备可靠性与智能化国家重点实验室,天津300130 河北省电磁场与电器可靠性重点实验室,天津300130 |
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| Snippet | TM464; 弱电网并网运行时会产生谐波干扰以及电网电压频率波动等问题,导致逆变器输出电流谐波失真.弱电网并网环境对锁相环(Phase Locked Loop,PLL)的性能提出了更高的要求.... |
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| Title | 弱电网下电压源型逆变器锁相环的改进 |
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