适用于机电暂态仿真的大型光伏电站在线动态等值方法

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适用于机电暂态仿真的大型光伏电站在线动态等值方法

更新时间：2025-08-13

- 适用于机电暂态仿真的大型光伏电站在线动态等值方法
- Automation of Electric Power Systems Vol. 39, Issue 12, Pages: 21-26(2015)
- 作者机构：
  
  中国电力科学研究院,北京市,100192
- 作者简介：
- 基金信息：
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- Published：2015
- 稿件说明：
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CUI Xiaodan. [J]. Automation of electric power systems, 2015, 39(12): 21-26.
DOI：

CUI Xiaodan. [J]. Automation of electric power systems, 2015, 39(12): 21-26. DOI：

摘要

为了提高光伏电站并网安全稳定在线计算的准确性和时效性

提出了一种适用于机电暂态仿真的大型光伏电站在线动态等值方法。在线计算逆变器聚类指标并分群等值

根据聚类指标门槛值形成等值方案

对比等值前后的暂态响应特征判断等值的有效性并迭代修正。基于实际工况对光伏电站进行在线等值提高了模型的准确性。为提高计算效率

详细模型下的响应曲线和用于聚类指标计算的参数灵敏度通过离线计算并建立数据库、在线根据实测信息匹配获取。基于实际电网的仿真计算验证了该方法的有效性。

Abstract

In order to improve the modeling accuracy and limitation period of the large-scale photovoltaic power plant for electromechanical transient simulation

an online dynamic equivalent method for the large-scale photovoltaic plant is proposed. The inverter clustering indices are calculated online with the inverters clustered

while the equivalent scheme is generated based on clustering index threshold. The validity of the equivalent scheme is judged by comparing the power system transient response characteristics before and after equivalence and iterative modification is carried out. The proposed real-time working conditions based equivalent method is able to improve the accuracy of the model. To increase computational efficiency

the parameter sensitivities of inverters and transient response of the photovoltaic plant detailed model are calculated offline

and a data base is set up

for acquisition via online actual information matching. An example of real power grid has confirmed the validity of the method proposed. This work is supported by State Grid Corporation of China (No. SGCC-MPLG003-2012

No. 5442NY120025) and Jiangsu Provincial Natural Science Foundation of China (No. BK2011137).

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