Study on DFIG voltage control strategy considering small-disturbance voltage stability of microgrid

2017 ◽  
Author(s):  
Jingjing Zhao ◽  
Liangliang Zuo ◽  
Shiyang Huang ◽  
Lingguang Zhao
Keyword(s):  
Control Strategy ◽  
Voltage Stability ◽  
Voltage Control ◽  
Small Disturbance ◽  
Voltage Control Strategy

scholarly journals A Voltage Control Strategy of VSG Based on Self-Adaptive Inertia Coefficient and Droop Coefficient

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Shizhi Lin ◽  
Lei Lin ◽  
Buying Wen
Keyword(s):  
Steady State ◽  
Power Systems ◽  
Control Strategy ◽  
Voltage Stability ◽  
Voltage Control ◽  
System Response ◽  
Voltage Control Strategy ◽  
Inertia Coefficient ◽  
Voltage Deviation ◽  
Self Adaptive

With the increasing penetration rate of distributed renewable energy in power systems, the control strategy of virtual synchronous generator (VSG) is widely used for several years. Some existing VSG control strategies have been able to solve the stability problems caused by the abnormal grid voltage, but the effects of the inertia coefficient and the droop coefficient on the voltage stability are not taken into account. In order to further improve the voltage stability of the microgrid system, a voltage control strategy of VSG based on self-adaptive inertia coefficient and droop coefficient is proposed in this paper. When the voltage is far from the steady state, the increase of the inertia coefficient can decrease the voltage deviation. On the contrary, when it is close to the steady state, the decrease of the inertia coefficient can make the system response speed accelerate. According to the real-time voltage deviation, the droop coefficient can change adaptively to decrease the adjusting time and the voltage deviation during the disturbance. Finally, the simulation model of VSG is built by MATLAB/Simulink for conducting simulation experiments. Compared with other strategies, the correctness and effectiveness of the proposed control strategy are validated.

The reactive power voltage control strategy of PV systems in low-voltage string lines

2017 ◽  
Author(s):  
Feng Zhang ◽  
Xiaolong Guo ◽  
Xiqiang Chang ◽  
Guowei Fan ◽  
Lianger Chen ◽  
...  
Keyword(s):  
Control Strategy ◽  
Reactive Power ◽  
Low Voltage ◽  
Voltage Control ◽  
Voltage Control Strategy ◽  
Pv Systems
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