| 引用本文: | 盘宏斌,阮浩浩,张佳乐.基于参数化镇定控制器和误差信号H2范数的LCL型
并网逆变器电流控制方法[J].电力系统保护与控制,2021,49(4):1-12.[点击复制] |
| PAN Hongbin,RUAN Haohao,ZHANG Jiale.A parameterized stabilizing controller and H2 norm-based control scheme for LCL-filtered grid-tied inverters[J].Power System Protection and Control,2021,49(4):1-12[点击复制] |
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| 摘要: |
| 在LCL型并网逆变系统中，通常为了满足系统性能会对闭环结构进行调整，而这种调整与保证系统内部稳定性之间存在较大矛盾。为解决此问题，提出一种基于参数化镇定控制器和误差信号H2范数的并网电流控制方法。该方法利用参数化镇定控制器保证系统的内部稳定，进而通过设计误差信号的H2范数和开环增益来确定镇定控制器的自由参数和开环增益系数，使系统具有快速的动态响应和高鲁棒性，实现了零稳态误差。该方法不仅可以较大程度地抑制电网电压对入网电流的干扰，而且在不同工况参考电流突变时，并网逆变系统可在半个周期内快速且准确地稳定输出三相平衡的正弦并网电流。仿真和实验结果验证了该方法的有效性和可行性。 |
| 关键词: 并网逆变器 参数化镇定控制器 内部稳定性 H2范数 增益系数 |
| DOI：DOI: 10.19783/j.cnki.pspc.200542 |
| 投稿时间：2020-07-16修订日期：2020-12-22 |
| 基金项目:国家自然科学基金项目资助(51577162) |
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| A parameterized stabilizing controller and H2 norm-based control scheme for LCL-filtered grid-tied inverters |
| PAN Hongbin,RUAN Haohao,ZHANG Jiale |
| (College of Automation and Electronic Information, Xiangtan University, Xiangtan 411105, China) |
| Abstract: |
| In an LCL grid-connected inverter system, there is a big contradiction between adjusting the closed-loop structure to meet system performance and ensuring the internal stability of the system. To solve this problem, a grid-connected current control method based on a parameterized stabilization controller and H2 norm of the error signal is proposed. This method uses the parameterized stabilization controller to ensure the internal stability of the system, and then determines the free parameters of the stabilization controller and open-loop gain coefficient by designing the H2 norm of the error signal and open-loop gain, so that the system has a fast dynamic response and zero steady-state error. This method can not only greatly suppress the interference of the grid voltage on the grid current, but also the grid-connected inverter system can quickly and accurately output the three-phase balanced sinusoidal current within half a cycle when the reference current changes suddenly under different operating conditions. The performance and validity of the proposed control scheme are verified by simulations and experimental results.
This work is supported by the National Natural Science Foundation of China (No. 51577162). |
| Key words: grid-connected inverter parameterized stabilization controller internal stability H2 norm gain coefficient |
