| 傅家骏,陈才学,兰永红.基于等价输入干扰的 UPS 逆变器 H∞ 重复控制[J].电子测量与仪器学报,2022,36(6):134-143 |
| 基于等价输入干扰的 UPS 逆变器 H∞ 重复控制 |
| Equivalent input disturbance-based H∞repetition control of UPS inverter |
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| DOI： |
| 中文关键词: 逆变器 等价输入干扰 H∞ 性能 重复控制 |
| 英文关键词:inverter equivalent input disturbance H∞
performance repetitive control |
| 基金项目:国家自然科学基金(61573298)、湖南省自然科学基金(2020JJ6037)项目资助 |
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| 中文摘要: |
| 针对不间断电源(uninterruptible power supplies, UPS)逆变器 H∞ 重复控制系统在跟踪精度和扰动抑制性能之间的固有
约束,提出一种附加等价输入干扰(equivalent input disturbance, EID)补偿的 H∞ 重复控制策略,实现对负载突变等干扰的快速
抑制和参考电压的高精度跟踪。 首先采用状态空间平均法建立 UPS 逆变器的动态数学模型,并给出总体控制框图;在 H∞ 重复
控制器的基础上,求得一组负载突变时仍能保持稳定的状态反馈增益;其次,通过状态观测器构造 EID 估计器,给出了具体设计
步骤。 实验结果表明,所提控制策略能将 UPS 逆变器遭受非线性强干扰后的恢复时间缩短约 1 个周期,输出电压有效值的最
大偏移量降至 0. 09%,改善 UPS 逆变器重复控制系统对扰动抑制的动态性能。 |
| 英文摘要: |
| Aiming at the inherent constraints between tracking accuracy and disturbance suppression performance of H∞
repetitive control
system for uninterruptible power supplies (UPS) inverter, an H∞
repetitive control strategy with equivalent input disturbance (EID)
compensation is proposed, which realizes the rapid suppression of load sudden change and other disturbances and the high-precision
tracking of reference voltage. Firstly, the dynamic mathematical model of UPS inverter is established by using the state space average
method, and the overall control block diagram is given. Based on the H∞
repetitive controller, a set of state feedback gains that can
maintain stability when the load changes suddenly are obtained. Secondly, the EID estimator is constructed by a state observer, and the
specific design steps are given. The experimental results show that the proposed control strategy can shorten the recovery time of UPS
inverter after suffering from strong nonlinear interference by about one cycle, reduce the maximum offset of output voltage RMS to
0. 09%, and improve the dynamic performance of UPS inverter repetitive control system for disturbance suppression. |
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