含柔性直流电网的交直流混联系统潮流优化控制

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含柔性直流电网的交直流混联系统潮流优化控制

更新时间：2025-08-13

- 含柔性直流电网的交直流混联系统潮流优化控制
- Automation of Electric Power Systems Vol. 41, Issue 12, Pages: 70-76(2017)
- 作者机构：
  
  四川大学电气信息学院,四川省,成都市,610065
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2017
- 稿件说明：
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MIAO Dan. [J]. Automation of electric power systems, 2017, 41(12): 70-76.
DOI：

MIAO Dan. [J]. Automation of electric power systems, 2017, 41(12): 70-76. DOI：

摘要

含柔性直流电网的交直流混联系统中换流站功率参考值和下垂系数分别决定了换流站功率分配以及直流电压与直流功率间的斜率控制关系

进而决定了整个交直流混联系统的潮流分布

因此功率参考值和下垂系数的选取至关重要。为此

提出一种含柔性直流电网的交直流混联系统潮流优化控制策略

对功率参考值和下垂系数进行优化

以实现系统网络损耗和直流电压偏差率综合最小的目标。首先

针对含柔性直流电网的交直流混联系统建立了换流站模型、交流系统模型和直流电网模型

并建立了直流电网在主从运行方式或下垂运行方式下的控制方程统一表达式。然后

基于含柔性直流电网的交直流混联系统最优潮流

在线自适应修正换流站功率参考值和下垂系数。最后

对不同运行方式下含五端柔性直流电网的修正IEEE 39和IEEE 118节点交直流混联系统进行计算分析

其结果验证了所述方法的有效性。

Abstract

The power reference value and the droop coefficient determine power distribution of converter stations and the specific relationship between DC voltage and DC power

and then the power flow of the AC/DC hybrid system with flexible DC grid. So it is very important to select the power reference value and the droop coefficient. A power flow optimal control method for AC/DC hybrid system with flexible DC grid is proposed to minimize the network loss and DC voltage deviation rate. Firstly

the models of converter stations

AC system and DC grid for AC/DC hybrid system with flexible DC grid are built

and a unified expression for the governing equations of DC grid in master-slave control and droop control operation modes is put forward. Then

based on the optimal power flow of AC/DC hybrid system with flexible DC grid

the power reference value and the droop coefficient are corrected continuously in the system running process. Finally

the modified IEEE 39-bus system and IEEE 118-bus system containing five ends of flexible DC grid in different operating modes are simulated and analyzed

with the calculation results showing the effectiveness of the proposed method. This work is supported by State Grid Corporation of China(No. SGRIZLKJ［2015］457).

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