多端直流配电系统负载变流器相位补偿控制策略

TANG Xin

doi:10.19783/j.cnki.pspc.240420

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多端直流配电系统负载变流器相位补偿控制策略

更新时间：2025-12-02

- 多端直流配电系统负载变流器相位补偿控制策略
- Power System Protection and Control Vol. 45, Issue 2, Pages: 50-61(2025)
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- DOI：10.19783/j.cnki.pspc.240420
  CLC： TM46;TM721.1
- Published：2025
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TANG Xin. 多端直流配电系统负载变流器相位补偿控制策略[J]. Power System Protection and Control, 2025, 45(2): 50-61.
DOI：

TANG Xin. 多端直流配电系统负载变流器相位补偿控制策略[J]. Power System Protection and Control, 2025, 45(2): 50-61. DOI： 10.19783/j.cnki.pspc.240420.

摘要

在多端直流配电系统中，定功率控制负载变流器的恒功率特性会降低系统阻尼，易引发直流电压和直流电流振荡，导致系统失稳。为此，提出一种基于直流电压前馈的相位补偿控制策略。首先，推导了负载变流器的直流侧阻抗模型，并基于连分式理论对阻抗模型进行降阶，得到一阶阻抗模型。其次，基于一阶阻抗模型分析出影响负载变流器负阻尼特性的主导因素，进而推导出基于直流电压前馈的相位补偿控制策略，可在全频段将负载变流器阻抗校正为正阻尼特性，从而提高直流配电系统的稳定性。最后，以三端直流配电系统为例，通过Simulink仿真和StarSim硬件在环实验，验证了所提控制策略的有效性。

Abstract

In multi-terminal DC distribution systems

the system damping is reduced by the constant power characteristics of the load converters with constant power control

which can easily cause DC voltage and current oscillations

leading to system instability. Therefore

a phase compensation control strategy based on DC voltage feedforward is proposed. Firstly

the DC side impedance model of the load converter is established

and is reduced to a first-order impedance model based on the continuous fraction theory. Secondly

based on the first-order impedance model

the main factors affecting the negative damping characteristics of the load converter are analyzed

and a phase compensation control strategy based on DC voltage feedforward is proposed. The strategy can correct the load converter impedance to positive damping characteristic across the entire frequency range

thereby improving the stability of the DC distribution system. Finally

taking a three-terminal DC distribution system as an example

the effectiveness of the proposed control strategy is verified through Simulink simulation and hardware-in-the-loop experiment on StarSim.

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Related Institution

LIU Defu(1. College of Electrical and Power Engineering, Taiyuan University of Technology

State Grid Xinjiang Control Center for Power Dispatching

SHEN Siheng(1. School of Automation, Southeast University

China Electric Power Research Institute

ZHU Yaheng(1. College of New Energy, China University of Petroleum (East China)

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