新能源发电并网系统的小信号阻抗/导纳网络建模方法

XIE Xiaorong

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新能源发电并网系统的小信号阻抗/导纳网络建模方法

更新时间：2025-08-13

- 新能源发电并网系统的小信号阻抗/导纳网络建模方法
- Automation of Electric Power Systems Vol. 41, Issue 12, Pages: 26-32(2017)
- 作者机构：
  
  清华大学电机工程与应用电子技术系,北京市,100084
- 作者简介：
- 基金信息：
- DOI：
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- Published：2017
- 稿件说明：
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XIE Xiaorong. [J]. Automation of electric power systems, 2017, 41(12): 26-32.
DOI：

XIE Xiaorong. [J]. Automation of electric power systems, 2017, 41(12): 26-32. DOI：

摘要

变流器与交直流电网之间相互作用引发的功率振荡是新能源发电并网系统面临的重要稳定性问题。小信号建模是分析这一问题的基础

但变流器数量巨大、结构各异及其控制系统“黑(灰)箱化”

导致常规的建模方法面临困难。为此

文中提出新能源发电并网系统的小信号阻抗(导纳)网络建模方法

通过将系统部件建模为可反映其内在动态的外特性频域阻抗(导纳)模型

并根据电网拓扑互联起来形成阻抗(导纳)网络

获得目标系统的整体模型

进而通过阻抗聚合量化分析系统的振荡特性。采用河北沽源风电场—串补输电系统次同步振荡问题的建模与分析来说明方法的有效性。

Abstract

The power oscillation induced by the interactions between power converters and AC/DC power grids is an important stability problem faced by grid-connected renewable energy generation systems(GREGSs). Small-signal modeling is the basis for the analysis of such a problem. But the large quantities of converters with different structures

parameters and “black(grey)-box” control systems make it very difficult for the conventional method to handle the issue of system modeling. A methodology of small-signal impedance(admittance)network modeling is proposed to address the issue. With each component represented with an impedance or admittance model

a GREGS as a whole can be modeled as the network of impedance or admittance by interconnecting all the individual impedances(admittances)according to the topology of the grid. Such an impedance(admittance)network model can be further aggregated into a lumped impedance(admittance)

with which the features of the oscillation could be quantified given the frequency-dependent characteristics of the lumped impedance(admittance). Case studies on the Guyuan series-compensated wind power system have verified the effectiveness of the proposed modeling method. This work is supported by National Key Research and Development Program of China(No. 2016YFB0900104)and State Grid Corporation of China(No. SGXJ0000KXJS1500669).

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