Analysis and Suppression of MMC-RPC Circulating Current Based on SOGI-FLL

Pinggang SONG; Jiakang GONG; Zhenbang ZHOU; Dan XIAO

doi:10.13890/j.issn.1000-128x.2019.02.006

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Analysis and Suppression of MMC-RPC Circulating Current Based on SOGI-FLL

更新时间：2021-12-13

- Analysis and Suppression of MMC-RPC Circulating Current Based on SOGI-FLL
- Electric Drive for Locomotives Issue 2, Pages: 28-34(2019)
- 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.2019.02.006
  CLC：
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Pinggang SONG, Jiakang GONG, Zhenbang ZHOU, et al. Analysis and Suppression of MMC-RPC Circulating Current Based on SOGI-FLL. [J]. Electric Drive for Locomotives (2):28-34(2019)
DOI：

Pinggang SONG, Jiakang GONG, Zhenbang ZHOU, et al. Analysis and Suppression of MMC-RPC Circulating Current Based on SOGI-FLL. [J]. Electric Drive for Locomotives (2):28-34(2019) DOI： 10.13890/j.issn.1000-128x.2019.02.006.

摘要

针对模块化多电平构造的新型铁路功率调节器（MMC-RPC）在牵引供电系统电压扰动的非理想工况下运行时，内部环流严重影响其工作性能及运行效率，甚至造成供电系统中某些电力设备无法正常运行等诸多问题，提出在MMC交流侧采用新型SOGI-FLL锁频环控制器配合环流抑制侧采用的PIR控制器，共同对MMC-RPC内部环流进行准确跟踪及治理，改善MMC-RPC运行性能。当电压输入信号发生扰动时，新型SOGI-FLL相比于传统锁相环PLL能明显降低输出角频率的超调量，提高其响应速度。有效解决了采用PIR环流抑制器治理环流时，由系统频率偏移过大导致的谐波环流跟踪不准确且谐波环流治理效果不佳等问题。最后，在Matlab仿真平台搭建了MMC-RPC环流抑制仿真模型，仿真结果证实了采用SOGI-FLL控制器和PIR环流抑制器共同对MMC-RPC环流进行准确跟踪和抑制的优越性和有效性。

Abstract

In view of the problems of the modular multi-level structure of the new railway power regulator (MMC-RPC), such as the serious influence of internal circulating current on the performance and efficiency of traction power supply system under the non-ideal operating conditions of voltage disturbance, and even the failure of some power equipment in the power supply system, a new SOGI-FLL frequency-locked loop controller was proposed to cooperate with circulating current on the AC side of the MMC, the PIR controller was used in the suppression side to track and control the internal circulation of MMC-RPC accurately and improve the operation performance of MMC-RPC. When the voltage input signal was disturbed, the new SOGI-FLL could significantly reduce the overshoot of the output angular frequency and improve its response speed compared with the traditional PLL. It effectively solved the problems of inaccurate tracking of harmonic circulating current and poor harmonic circulating current control effect caused by excessive frequency offset of the system when PIR circulating current suppressor was used to control the circulating current. Finally, the MMC-RPC circulation suppression simulation model was built on the MATLAB simulation platform. The simulation results confirmed the superiority and effectiveness of using SOGI-FLL controller and PIR circulation suppressor to track and suppress the MMC-RPC circulation accurately.

关键词

模块化多电平环流抑制功率调节器比例积分谐振控制器二阶广义积分器锁频环高速铁路仿真

Keywords

modular multilevelcirculating-current suppressionpower regulatorproportional integral resonant controllerSecond-order generalized integratorfrequency-locked loophigh-speed railwaysimulation

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