A novel virtual synchronous generator control strategy based on improved swing equation emulating and power decoupling method

2016 ◽  
Author(s):  
Mingxuan Li ◽  
Yue Wang ◽  
Ningyi Xu ◽  
Yonghui Liu ◽  
Wenti Wang ◽  
...  
Keyword(s):  
Control Strategy ◽  
Synchronous Generator ◽  
Decoupling Method ◽  
Power Decoupling ◽  
Virtual Synchronous Generator ◽  
Swing Equation

Improved power decoupling control strategy based on virtual synchronous generator

2017 ◽  
Vol 10 (4) ◽  
pp. 462-470 ◽  
Author(s):  
Bin Li ◽  
Lin Zhou ◽  
Xirui Yu ◽  
Chen Zheng ◽  
Jinhong Liu
Keyword(s):  
Control Strategy ◽  
Synchronous Generator ◽  
Decoupling Control ◽  
Power Decoupling ◽  
Virtual Synchronous Generator

scholarly journals Precise Reactive Power-Voltage Droop Control of Parallel Virtual Synchronous Generators that Considers Line Impedance

Electronics ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1344
Author(s):  
Xiangwu Yan ◽  
Hongbin Ma ◽  
Jiaoxin Jia ◽  
Waseem Aslam ◽  
Chenguang Wang ◽  
...  
Keyword(s):  
Control Strategy ◽  
Reactive Power ◽  
Integrated Control ◽  
Synchronous Generator ◽  
Control Voltage ◽  
Droop Control ◽  
Parallel Operation ◽  
Distributed Generators ◽  
Power Decoupling ◽  
Virtual Synchronous Generator

Problems such as high power coupling, low distribution accuracy, and insufficient reactive power-voltage droop accuracy occur when distributed generators are operated in parallel due to the influence of line impedance. The precise control of output reactive power and voltage is difficult to achieve using traditional virtual synchronous generator (VSG) control. Taking this into consideration, this study proposes a virtual synchronous generator reactive power-voltage integrated control strategy that considers line parameters to solve this problem. First, the impedance voltage drop of the line is compensated for in accordance with local information control to ensure the consistency of the control voltage in parallel operation of distributed generators and to realize the precise droop control of reactive power and the voltage of the point of common coupling (UPCC). Second, virtual negative impedance control is added to change the equivalent output impedance characteristics of the system and achieve power decoupling. On this basis, the active frequency and reactive voltage decoupling control effect of the improved control strategy is quantified and analyzed using the relative gain matrix. The accuracy of reactive power distribution and droop control is theoretically derived and analyzed by establishing a small-signal model of a two-machine parallel system. Finally, the accuracy and effectiveness of the proposed integrated control strategy are verified via a simulation model and an experimental platform for parallel operation. Results show that the proposed integrated control strategy can effectively solve the problems of power decoupling and accurate distribution, reduce system loop current, and realize accurate reactive power-voltage droop. Compared with the traditional VSG control strategy, the dynamic deviation of UPCC is reduced by at least 40% when a large-scale load disturbance occurs.

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