scholarly journals The Integrated Switching Control Strategy for Grid-Connected and Islanding Operation of Micro-Grid Inverters Based on a Virtual Synchronous Generator

Energies ◽  
2018 ◽  
Vol 11 (6) ◽  
pp. 1544 ◽  
Author(s):  
Kai Shi ◽  
Guanglei Zhou ◽  
Peifeng Xu ◽  
Haihan Ye ◽  
Fei Tan
Keyword(s):  
Control Strategy ◽  
Synchronous Generator ◽  
Switching Control ◽  
Islanding Operation ◽  
Switching Control Strategy ◽  
Micro Grid ◽  
Virtual Synchronous Generator

scholarly journals Research on the virtual synchronous generator control strategy of grid-connected permanent-magnet direct-driven wind power system

2018 ◽  
Vol 22 (Suppl. 2) ◽  
pp. 401-408
Author(s):  
Xiaohong Hao ◽  
Huimin Wang ◽  
Bei Peng ◽  
Zhi Yao ◽  
Yixiong Wang ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Wind Power ◽  
Control Strategy ◽  
Large Scale ◽  
Wind Farm ◽  
Synchronous Generator ◽  
Frequency Change ◽  
Micro Grid ◽  
Grid Connected Inverter ◽  
Virtual Synchronous Generator

Renewable energy, distributed generation, and micro-grid technology have been widely concerned for a long time. The traditional grid-connected inverter control strategy does not take into account the problem of inertia which is short and fast to cause the frequency change. The virtual synchronous generator control strategy is adopted to simulate the synchronous generator characteristics, which enhanced the inertia and damp of the system. For the micro-grid of wind power grid-connected, the storage battery is arranged on the AC side of the permanent magnet direct-drive wind turbine, and the model of the virtual synchronous generator is established. Thus the grid-connected performance of large-scale wind farm is improved. Here, the effect of moment of inertia in the virtual synchronous generator and the grid-connected regulation of virtual synchronous generator are verified by using PSCAD/EMTDC. The simulation results show that the grid-connected inverter controlled by the virtual synchronous generator is approximately equivalent to the synchronous generator in external characteristic. The grid-connected inverter based virtual synchronous generator control has a beneficial to adjust frequency and voltage, and can enhance the standby inertia of new energy and grid power generation

Improvement of transient and small signal stability in micro grid by hybrid technique with virtual synchronous generator control scheme

2021 ◽  
pp. 014233122110131
Author(s):  
Santhoshkumar Thenpennaisivem ◽  
V. Senthilkumar
Keyword(s):  
Synchronous Generator ◽  
Emperor Penguin ◽  
Hybrid Technique ◽  
Small Signal ◽  
Small Signal Stability ◽  
Change Condition ◽  
Hunting Behaviour ◽  
Micro Grid ◽  
Virtual Inertia ◽  
Virtual Synchronous Generator

In this article, a hybrid technique is proposed for improving the transient and small signal response in micro grid using virtual inertia. The proposed hybrid technique is the combined execution of both the emperor penguin optimizer (EPO) and butterfly optimization algorithm (BOA), and hence it is called EPOBOA technique. The major objective of the EPOBOA technique is to “optimize the control parameters to regulate the changes occurred in the grid parameter such as voltage and frequency based on the variations of inertia”. Here, the EPO is executed to modify the parameters of virtual synchronous generator units to achieve the objective function. The searching behaviour of the EPO is adapted by using the hunting behaviour of BOA. The proposed technique is executed in MATLAB/Simulink work site, and the experimental results are analyzed under three test cases: normal condition, irradiation change condition, and load change condition. The performance of the proposed technique is compared with different existing techniques and the calculated frequency deviation index of the proposed technique in all the cases is 0.0051, 0.0045, and 0.0047 and found to be very optimal compared with existing methods. Overall, the experimental outcomes show that the proposed EPOBOA method is more efficient and confirm its ability to solve the issues.

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