Integral sliding mode current control for three phase voltage source rectifier under unbalanced input voltage conditions

IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society Pub Date : 2017-10-01 DOI:10.1109/IECON.2017.8217546

Weipeng Yang, Hang Zhang, Jianhua Wang, Aimin Zhang, Z. Wang

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引用次数: 2

Abstract

In this paper, a robust current control strategy for three-phase voltage source rectifier (VSR) under unbalanced input voltage conditions is proposed. In the strategy, dual current control structure with current regulation performed in positive and negative sequence (PNS) synchronous reference frame (SRF) is used and negative sequence current compensation is adopted to attain constant dc link voltage and sinusoidal ac line current. With regard to the current control law, power and flexibility of sliding mode control (SMC) and the Lyapunov stability theory is fully exploited and an enhanced SMC with integral action in both the sliding manifold and control law (ISMC) is obtained to solve the non-zero steady state error problem that faced in practice by conventional SMC (CSMC). As such, satisfactory performance can be obtained and system robustness can be guaranteed in the Lyapunov sense, in the presence of uncertainties with known bounds. Effectiveness of the ISMC current control strategy is verified through simulation and comparative study on a VSR model with MATLAB/SIMULINK.

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输入电压不平衡条件下三相电压源整流器的积分滑模电流控制

提出了一种输入电压不平衡条件下三相电压源整流器(VSR)的鲁棒电流控制策略。该策略采用在正、负序同步参考系(SRF)中进行电流调节的双电流控制结构，并采用负序电流补偿实现直流链路电压恒定和交流线路电流正弦。针对当前的控制律，充分利用滑模控制(SMC)和Lyapunov稳定性理论的力量和灵活性，得到了滑模控制与控制律同时具有积分作用的增强型滑模控制(ISMC)，解决了传统滑模控制(CSMC)在实际应用中面临的非零稳态误差问题。这样，在存在已知界的不确定性时，可以获得令人满意的性能，并且可以保证系统在Lyapunov意义上的鲁棒性。利用MATLAB/SIMULINK对VSR模型进行仿真和对比研究，验证了ISMC电流控制策略的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society

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