Nonlinear Control Strategy of MMC-RPC Based on Lyapunov Function

Pinggang SONG; Zhiqiang JIANG; Shengdi YANG; Penghui ZHOU; Zhenbang ZHOU

doi:10.13890/j.issn.1000-128x.2021.04.013

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Nonlinear Control Strategy of MMC-RPC Based on Lyapunov Function

Electric Traction and Control | 更新时间：2021-12-09

- Nonlinear Control Strategy of MMC-RPC Based on Lyapunov Function
- Electric Drive for Locomotives Issue 4, Pages: 78-84(2021)
- 作者机构：
  
  1.华东交通大学　电气与自动化工程学院，江西　南昌　330013
  2.中车株洲所电气技术与材料工程研究院，湖南　株洲　412001
- 作者简介：
- 基金信息：
- DOI：10.13890/j.issn.1000-128x.2021.04.013
  CLC：
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Pinggang SONG, Zhiqiang JIANG, Shengdi YANG, et al. Nonlinear Control Strategy of MMC-RPC Based on Lyapunov Function. [J]. Electric Drive for Locomotives (4):78-84(2021)
DOI：

Pinggang SONG, Zhiqiang JIANG, Shengdi YANG, et al. Nonlinear Control Strategy of MMC-RPC Based on Lyapunov Function. [J]. Electric Drive for Locomotives (4):78-84(2021) DOI： 10.13890/j.issn.1000-128x.2021.04.013.

摘要

为综合治理牵引供电系统中的电能质量问题，以功率补偿向量图为基础，分析V/v牵引变压器左右两侧供电区间的功率关系，选取模块化多电平的铁路功率调节器（MMC-RPC）为研究对象，通过有功功率平衡、无功功率补偿和谐波功率反向注入等方式综合治理牵引供电系统中的负序、谐波等电能质量问题。在整个MMC-RPC控制系统中，为提高系统正常工作时内外部扰动下的鲁棒性，通过Lyapunov函数的非线性控制方法对MMC-RPC进行控制，外环采用定功率和定电压的控制策略，内环则采用基于Lyapunov函数的非线性控制策略；内环从稳定性角度出发，选取最优控制参数，保证供电臂上的线路参数在发生摄动或者负载切换时，系统仍能稳定可靠运行。在MATLAB/Simulink中搭建MMC-RPC仿真系统，模拟牵引网负载突变和线路参数摄动时，控制系统的动态调节和抗扰动能力，与传统双闭环PI控制策略效果相比，展现了该控制策略的可行性和有效性。

Abstract

In order to comprehensively control the power quality in the traction power supply system, based on the power compensation vector diagram, the power relationship between the left and right power supply sections of the V/v traction transformer was analyzed. Taking the modular multi-level railway power regulator (MMC-RPC) as research object, the power quality problems such as negative sequence and harmonic in the traction power supply system were comprehensively solved by active power balance,reactive power compensation and harmonic power reverse injection. In order to improve the robustness of the internal and external disturbances during normal operation of the system, the MMC-RPC was controlled by the nonlinear control method of the Lyapunov function, and the basis of constant power and constant voltage was used in the outer loop. In the upper and inner loops, the nonlinear control strategy based on Lyapunov function was adopted. From the perspective of inner loop stability, the optimal control parameters were selected to ensure that the system could still operate stably and reliably when the line parameters on the power supply arm were perturbed or load switching. The MMC-RPC simulation system was built with Matlab/simulink to simulate the dynamic adjustment and anti-disturbance capability of the control system with the traction network load mutation and line parameter perturbation.Compared with the traditional double closed-loop PI control strategy, the control strategy is more feasible and effective.

关键词

模块化多电平换流器铁路功率调节器Lyapunov函数稳定性双闭环PI控制

Keywords

modular multilevel converterrailway power regulatorLyapunov functionstabilitydouble closed loop PI control

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