| 引用本文: | 满灿,王宝华.LCL型三相并网逆变器自适应控制策略及其参数设计[J].电力系统保护与控制,2017,45(14):134-142. |
| MAN Can,WANG Baohua.Adaptive control strategy and its parameters design of grid-connected inverters with LCL filter[J].Power System Protection and Control,2017,45(14):134-142 |
|
| 摘要: |
| 针对LCL型三相并网逆变器，为改善传统控制策略无法适应输出功率变动带来的稳态误差影响，提出一种基于RBF网络的自适应控制策略。该控制策略可根据外界条件变化，不断修正控制器参数，得到最优PI值，增强了系统稳定性和鲁棒性。为解决LCL滤波器产生的谐振问题，采用电容电流反馈有源阻尼控制，给出一种基于系统幅相特性的电容电流反馈有源阻尼系数设计方法。进行了LCL型并网逆变器并网运行仿真。仿真结果验证了所提控制方法及参数设计的正确性和可行性。 |
| 关键词: 并网逆变器 RBF网络 自适应控制 LCL滤波器 有源阻尼 |
| DOI：10.7667/PSPC161062 |
| 分类号: |
| 基金项目: |
|
| Adaptive control strategy and its parameters design of grid-connected inverters with LCL filter |
|
MAN Can,WANG Baohua
|
|
( Nanjing University of Science and Technology, Nanjing 210094, China)
|
| Abstract: |
| For LCL-type grid-connected inverters, an adaptive control strategy based on RBF neural network is proposed. This control strategy can improve the traditional control strategy responding to the influence of steady state error caused by output power changing. When the external conditions change, the control strategy can modify the controller parameters constantly and get the optimal PI value. This control strategy can enhance the system stability and robustness. In order to solve the resonance of LCL filter, the capacitor-current-feedback active damping is adopted. Based on the amplitude and phase characteristics of the system, a design method of the capacitor-current-feedback active damping coefficient is presented. Simulations of LCL-type grid-connected inverters in grid-connected mode are conducted. Simulation results validate the correctness and feasibility of the proposed method. |
| Key words: grid-connected inverter RBF network adaptive control LCL filter active damping |
