采用下垂控制的直流配电网小干扰稳定性分析

JIN Yangxin

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采用下垂控制的直流配电网小干扰稳定性分析

更新时间：2025-08-13

- 采用下垂控制的直流配电网小干扰稳定性分析
- Automation of Electric Power Systems Vol. 40, Issue 14, Pages: 78-85(2016)
- 作者机构：
  
  浙江大学电气工程学院,浙江省,杭州市,310027
- 作者简介：
- 基金信息：
- DOI：
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- Published：2016
- 稿件说明：
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JIN Yangxin. [J]. Automation of electric power systems, 2016, 40(14): 78-85.
DOI：

JIN Yangxin. [J]. Automation of electric power systems, 2016, 40(14): 78-85. DOI：

摘要

下垂控制是直流配电网的一种重要控制方式。推导了计及换流器时间常数的电压源型换流站本地控制数学模型及其线性化的小干扰分析模型。结合站间协调控制

分析了下垂控制的通用小干扰分析模型及两种典型情况。依据换流站小干扰分析模型

设计了小干扰等效阻抗模型

可将多端直流配电网逐端简化为单端换流站与若干小干扰等效阻抗组成的系统。最后利用根轨迹方法定量讨论了两种下垂控制方式的小干扰稳定性及其影响因素

并通过PSCAD/EMTDC数字仿真软件进行了验证。

Abstract

Droop control is an important DC distribution network control mode. A voltage source converter(VSC)substation local control mathematical model and its linearized small-signal analysis model are deduced. Furthermore

by referring to coordinated control

a general small-signal analytic model of droop control strategies

along with its two typical situations

is analyzed. Based on the VSC small-signal analysis model

the linearized equivalent impedance is devised

by which the whole DC distribution network can be simplified to a system comprising one VSC and several linearized equivalent impedances one by one. Finally the root locus method is adopted to discuss the small-signal stability and its factors of two droop control modes quantitatively

whose validity is verified with PSCAD/EMTDC digital simulation software. This work is supported by National High Technology Research and Development Program of China(863 Program)(No. 2015AA050104).

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