基于LCL滤波有源阻尼控制的Z源逆变器并网研究

与传统的逆变器相比,Z源逆变器由于其具有可以实现升降压功能、无需插入死区时间等优点而得到了广泛的应用。针对逆变器输出电压、电流高次谐波含量大的缺点,提出采用LCL型滤波器进行滤波,其滤波性能优异,但带来的谐振峰易引起系统的不稳定。所以采用电容电流内环、电网电流外环的双电流环有源阻尼方案对谐振峰进行抑制。为避免多次调试参数,提出一种控制参数设计方法,即对传递函数进行极点配置,从而得出最佳控制参数。在保证系统稳定性的前提下使系统具有一定的鲁棒性。最后,通过仿真和实验结果验证了所提方案的有效性和可行性。...

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Published in电力系统保护与控制 Vol. 46; no. 5; pp. 38 - 45
Main Author 杨峰峰;杨旭红
Format Journal Article
LanguageChinese
Published 上海市电站自动化重点实验室,上海电力学院自动化工程学院,上海 200090 01.03.2018
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ISSN1674-3415
DOI10.7667/PSPC170235

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Abstract 与传统的逆变器相比,Z源逆变器由于其具有可以实现升降压功能、无需插入死区时间等优点而得到了广泛的应用。针对逆变器输出电压、电流高次谐波含量大的缺点,提出采用LCL型滤波器进行滤波,其滤波性能优异,但带来的谐振峰易引起系统的不稳定。所以采用电容电流内环、电网电流外环的双电流环有源阻尼方案对谐振峰进行抑制。为避免多次调试参数,提出一种控制参数设计方法,即对传递函数进行极点配置,从而得出最佳控制参数。在保证系统稳定性的前提下使系统具有一定的鲁棒性。最后,通过仿真和实验结果验证了所提方案的有效性和可行性。
AbstractList 与传统的逆变器相比,Z源逆变器由于其具有可以实现升降压功能、无需插入死区时间等优点而得到了广泛的应用。针对逆变器输出电压、电流高次谐波含量大的缺点,提出采用LCL型滤波器进行滤波,其滤波性能优异,但带来的谐振峰易引起系统的不稳定。所以采用电容电流内环、电网电流外环的双电流环有源阻尼方案对谐振峰进行抑制。为避免多次调试参数,提出一种控制参数设计方法,即对传递函数进行极点配置,从而得出最佳控制参数。在保证系统稳定性的前提下使系统具有一定的鲁棒性。最后,通过仿真和实验结果验证了所提方案的有效性和可行性。
与传统的逆变器相比,Z 源逆变器由于其具有可以实现升降压功能、无需插入死区时间等优点而得到了广泛的应用.针对逆变器输出电压、电流高次谐波含量大的缺点,提出采用LCL型滤波器进行滤波,其滤波性能优异,但带来的谐振峰易引起系统的不稳定.所以采用电容电流内环、电网电流外环的双电流环有源阻尼方案对谐振峰进行抑制.为避免多次调试参数,提出一种控制参数设计方法,即对传递函数进行极点配置,从而得出最佳控制参数.在保证系统稳定性的前提下使系统具有一定的鲁棒性.最后,通过仿真和实验结果验证了所提方案的有效性和可行性.
Abstract_FL Compared to traditional inverter, Z source inverter has been widely used because of its advantages such as the boost and buck capability, no need to insert the dead-time and so on. Aiming at the disadvantage of high harmonic contents of output voltage and current, the LCL filter is proposed to filter, its performance is excellent, but the resonance peak is easy to cause the system instability. So in this paper the active damping scheme with inner loop of capacitor current and outer loop of grid current is adopted to suppress the resonance peak. In order to avoid tuning parameters repeatedly, a control parameter design method is proposed, which is the pole assignment of the transfer function, so as to obtain the optimal control parameters. Under the premise of ensuring the stability of system, the system has better robustness. Finally, the effectiveness and feasibility of the proposed scheme are verified by simulation and experimental results.
Author 杨峰峰;杨旭红
AuthorAffiliation 上海市电站自动化重点实验室、上海电力学院自动化工程学院,上海200090
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YANG Xuhong
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DocumentTitleAlternate Research on Z-source inverter grid-connected system based on LCL filter of active damping control
DocumentTitle_FL Research on Z-source inverter grid-connected system based on LCL filter of active damping control
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Issue 5
Keywords Z-source inverter
active damping
LCL filter
双环控制
LCL滤波器
简单升压控制
Z源逆变器
double-loop control
有源阻尼
simple boost control
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Notes Compared to traditional inverter, Z source inverter has been widely used because of its advantages such as the boost and buck capability, no need to insert the dead-time and so on. Aiming at the disadvantage of high harmonic contents of output voltage and current, the LCL filter is proposed to filter, its performance is excellent, but the resonance peak is easy to cause the system instability. So in this paper the active damping scheme with inner loop of capacitor current and outer loop of grid current is adopted to suppress the resonance peak. In order to avoid tuning parameters repeatedly, a control parameter design method is proposed, which is the pole assignment of the transfer function, so as to obtain the optimal control parameters. Under the premise of ensuring the stability of system, the system has better robustness. Finally, the effectiveness and feasibility of the proposed scheme are verified by simulation and experimental results.
Z-source inverter; LCL filter; active damping; double-loop control;
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PublicationTitle 电力系统保护与控制
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PublicationTitle_FL Power System Protection and Control
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Publisher 上海市电站自动化重点实验室,上海电力学院自动化工程学院,上海 200090
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与传统的逆变器相比,Z...
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SubjectTerms Z源逆变器;LCL滤波器;有源阻尼;双环控制;简单升压控制
Title 基于LCL滤波有源阻尼控制的Z源逆变器并网研究
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