| 提高弱电网下并网逆变器稳定性的复合补偿策略 |
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| 引用本文： | 张成,赵涛,朱爱华,孙权.提高弱电网下并网逆变器稳定性的复合补偿策略[J].陕西电力,2021,0(5):42-47,76. |
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| 作者姓名： | 张成 赵涛 朱爱华 孙权 |
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| 作者单位： | （南京工程学院， 江苏 南京 211167） |
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| 摘 要： | 采用电压前馈控制以及H∞控制组成的H∞复合控制策略，利用阻抗分析方法，分析电网阻抗对并网逆变器稳定性的影响，通过分析并网逆变器的输出阻抗特性，提出了一种在电压前馈通道引入复数滤波器以及在系统前向通道引入超前校正环节的复合补偿方法，以此提高并网逆变器在弱电网下的稳定性。最后，在MATLAB/Simulink中对所提方法进行仿真实验，结果表明，通过在电压前馈通道引入复数滤波器以及系统前向通道引入超前校正环节，可以提高所用策略对电网阻抗的适应能力。
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| 关 键 词： | H∞复合控制 复数滤波器 相角补偿 稳定性 电网阻抗 |
Composite Compensation Strategy for Improving Stability of Grid Connected Inverter in Weak Current Network |
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| ZHANG Cheng,ZHAO Tao,ZHU Aihua,SUN Quan.Composite Compensation Strategy for Improving Stability of Grid Connected Inverter in Weak Current Network[J].Shanxi Electric Power,2021,0(5):42-47,76. |
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| Authors: | ZHANG Cheng ZHAO Tao ZHU Aihua SUN Quan |
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| Affiliation: | （Nanjing Institute of Technology，Nanjing 211167，China） |
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| Abstract: | The H∞ compound control strategy composed of voltage feedforward control and H∞ control is adopted. By using impedance analysis method， the influence of grid impedance on the stability of grid connected inverter is analyzed. By analyzing the output impedance characteristics of grid connected inverter，a compound compensation method is proposed by introducing complex filter into voltage feedforward channel and leading correction link in forward channel of system， to improves the stability of the grid connected inverter in the weak current network. Finally，the proposed method is simulated in Matlab/Simulink. The results show that the adaptive ability of the strategy to the grid impedance can be improved by introducing complex filter into the voltage feed forward channel and leading correction link in system forward channel. |
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| Keywords: | H∞ compound control complex filter phase angle compensation stability grid impedance |
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