Comprehensive control strategy of microgrid frequency and voltage based on virtual synchronous generator

被引：0
|
作者：
Su H. [1 ,2 ]
Jiang K. [1 ,2 ]
Yang Z. [1 ,2 ]
He K. [1 ,2 ]
机构：
[1] School of Automation and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou
[2] Rail Transit Electrical Automation Engineering Laboratory of Gansu Province, Lanzhou Jiaotong University, Lanzhou
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2020年 / 40卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Frequency stability; Small-signal model; Virtual governor; Virtual synchronous generator; Voltage estimation; Voltage stability;
D O I：
10.16081/j.epae.202001030
中图分类号：
学科分类号：
摘要：
For solving the problem that the frequency and voltage of microgrid are easily affected by load fluctuation and consequently deviate from the rated value, a comprehensive frequency and voltage control strategy based on virtual synchronous generator is proposed. The rated angular frequency is selected as the reference value of the damping link of swing equation based on comparing two cases of the reference value. And then, an automatic generation control system is designed by combining the virtual governor with the swing equation to realize no-error control on frequency. Subsequently, aiming at the defect that the voltage feedback needs the support of communication system, a revised voltage amplitude estimator is introduced to estimate the voltage of PCC(Point of Common Coupling) accurately. Under the action of automatic voltage controller, the secondary voltage regulation of PCC can be accomplished without configuring communication system, so that the economy is improved. Furthermore, the small-signal model of system is derived, and the influences of key parameters on the system stability are analyzed. © 2020, Electric Power Automation Equipment Editorial Department. All right reserved.
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收藏
页码：21 / 28
页数：7
相关论文
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