| 引用本文: | 杜田雨,付子义,任磊.不平衡电网下逆变器功率波动/电流质量协调控制[J].电力系统保护与控制,2020,48(5):141-150.[点击复制] |
| DU Tianyu,FU Ziyi,REN Lei.Coordinate control of power fluctuation and current quality for inverter under unbalanced voltage conditions[J].Power System Protection and Control,2020,48(5):141-150[点击复制] |
|
| 摘要: |
| 电网电压不平衡条件下系统的输出功率和电流质量是并网逆变器的主要关注指标。首先对两种控制目标下对应的参考电流进行量化分析。在此分析的基础上，提出一种功率波动抑制与电流平衡协调控制策略。该控制策略采用降阶谐振器提取参考电流中的谐波信号，利用一个权重系数调节参考电流中谐波分量的大小，基于无差拍电流控制实现提出的策略。该方法无需使用锁相环和正负序分离模块，利用瞬时电压计算电流参考值，简化了控制结构。通过Matlab/Simulink仿真和RT-LAB半实物实验平台，验证了控制策略的有效性和可行性。 |
| 关键词: 电网电压不平衡 降阶谐振器 谐波信号提取模块 功率/电流协调控制 电流平衡 |
| DOI：10.19783/j.cnki.pspc.190440 |
| 投稿时间：2019-04-22修订日期：2019-05-13 |
| 基金项目:国家重点研发计划专项资助(2016YFC0600906) |
|
| Coordinate control of power fluctuation and current quality for inverter under unbalanced voltage conditions |
| DU Tianyu,FU Ziyi,REN Lei |
| (College of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454000, China) |
| Abstract: |
| The output power and current quality of the system under grid voltage imbalance are the main indicators of grid-connected inverters. First, quantitative analysis is performed on the corresponding reference currents under the two control targets. Based on this analysis, a power fluctuation suppression and current balance coordinated control strategy is proposed. The control strategy uses a reduced-order resonator to extract the harmonic signal in the reference current, and uses a weight coefficient to adjust the magnitude of the harmonic component in the reference current, and implements the proposed strategy based on the deadbeat-free current control. The method does not need to use a phase-locked loop and a positive and negative sequence separation module, and uses the instantaneous voltage to calculate the current reference value, which simplifies the control structure. The effectiveness and feasibility of the control strategy are verified by Matlab/Simulink simulation and RT-LAB semi-physical experiment platform. This work is supported by National Key Research and Development Program of China (No. 2016YFC0600906). |
| Key words: grid voltage imbalance reduced-order resonator harmonic extraction module power/current coordinated control current balance |
