一种改进的分布式电源无功功率精确分配下垂控制策略

GUO Qian

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一种改进的分布式电源无功功率精确分配下垂控制策略

更新时间：2025-08-13

- 一种改进的分布式电源无功功率精确分配下垂控制策略
- Automation of Electric Power Systems Vol. 39, Issue 15, Pages: 30-34(2015)
- 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：2015
- 稿件说明：
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GUO Qian. [J]. Automation of electric power systems, 2015, 39(15): 30-34.
DOI：

GUO Qian. [J]. Automation of electric power systems, 2015, 39(15): 30-34. DOI：

摘要

由于独立运行的微网中馈线阻抗不匹配

采用传统下垂控制策略的分布式电源难以精确地分配输出功率。针对该问题

提出了一种改进的分布式电源无功功率精确分配下垂控制策略。在该策略中

中心控制器采用低带宽通信向各个分布式电源发送交流母线电压偏离补偿信号

分布式电源的本地控制器获取该补偿信号后

通过积分构造出输出电压的幅值参考。采用所提出的下垂控制策略

各分布式电源在实现无功功率精确分配的同时

可以有效消除交流母线的电压降

将母线电压恢复至额定值。仿真结果表明

所提出的改进下垂控制策略在复阻抗特性馈线微网中具有一定的有效性和可行性。

Abstract

Due to the mismatched feeders in an islanded microgrid

distributed generators (DGs) with conventional droop controller cannot share reactive power accurately. Aiming to solve this problem

an improved droop control strategy of accurate reactive power sharing is proposed. In the proposed scheme

the central controller sends the voltage deviation compensation signal to each DG via low bandwidth communication

and local controller of each DG integrates the signal to generate output voltage amplitude reference. Based on the proposed droop control strategy

each DG can realize accurate reactive power sharing and effectively eliminate voltage drop of AC bus. Hence

voltage restoration can also be realized in the microgrid. Simulation results indicate that the proposed droop control strategy is effective and feasible in the microgrid with complex impedance characteristics of feeders. This work is supported by National Natural Science Foundation of China (No. 51177149) and Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP) of China (No. 20130101110108).

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