New Control Scheme for Virtual Synchronous Generators of Different Capacities

Altahir, Sara Yahia; Yan, Xiangwu; Gadaalla, Abuzaid Saeed

doi:10.1109/icei.2017.30

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…The experiments are performed on a microgrid connected with two VSGs of the same power 15 kW, but different droop coefficient in Figure 13. The research on a microgrid of multiple VSGs system has been done by our research group in [30,31] PWM frequency for inverters is set to kHz and values of resistance inductor capacitor (RLC) filters are calculated accordingly. The system is designed to generate three-phase AC voltage.…”

Section: Multiple Vsgs System (Island Microgrid)-casementioning

confidence: 99%

“…The experiments are performed on a microgrid connected with two VSGs of the same power 15 kW, but different droop coefficient in Figure 13. The research on a microgrid of multiple VSGs system has been done by our research group in [30,31] Table 3 shows the parameters selected for the two VSGs. The droop coefficient of VSG1 is set to 10; four times less than the value set for VSG2.…”

Section: Multiple Vsgs System (Island Microgrid)-casementioning

confidence: 99%

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VSG Stability and Coordination Enhancement under Emergency Condition

et al. 2018

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Renewable energy sources are integrated into a grid via inverters. Due to the absence of an inherent droop in an inverter, an artificial droop and inertia control is designed to let the grid-connected inverters mimic the operation of synchronous generators and such inverters are called virtual synchronous generators (VSG). Sudden addition, removal of load or faults in the grid causes power and frequency oscillations in the grid. The steady state droop control of VSG is not effective in dampening such oscillations. Therefore, a new control scheme, namely bouncy control, has been introduced. This control uses a variable emergency gain, to enhance or reduce the power contribution of individual VSGs during a disturbance. The maximum power contribution of an individual VSG is limited by its power rating. It has been observed that this control, successfully minimized the oscillation of electric parameters and the power system approached steady state quickly. Therefore, by implementing bouncy control, VSGs can work in coordination to make the grid more robust. The proposed controller is verified through Lyapunov stability analysis.

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Section: Multiple Vsgs System (Island Microgrid)-casementioning

confidence: 99%

“…The experiments are performed on a microgrid connected with two VSGs of the same power 15 kW, but different droop coefficient in Figure 13. The research on a microgrid of multiple VSGs system has been done by our research group in [30,31] Table 3 shows the parameters selected for the two VSGs. The droop coefficient of VSG1 is set to 10; four times less than the value set for VSG2.…”

Section: Multiple Vsgs System (Island Microgrid)-casementioning

confidence: 99%

VSG Stability and Coordination Enhancement under Emergency Condition

et al. 2018

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“…As the hinge between distributed energy and distribution network, the important function of the grid‐connected inverter has been affirmed [3]. However, the frequency and voltage of power system are unstable caused by lack of inertia with power electronic devices [4]. In order to change this situation, a new control strategy is proposed to make the inverter to own characteristic of synchronous generator [5].…”

Section: Introductionmentioning

confidence: 99%