Improved virtual synchronous generator control strategy for seamless switching

Peng, Zishun; Dai, Yuxing; Wen, Yumei; Shen, Z. John; Li, Zongjian; Bi, Dongxue

doi:10.1109/apec.2018.8341137

Cited by 9 publications

(4 citation statements)

References 12 publications

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“…An autonomous wind and diesel-electric power system with energy storage has been proposed in the literature; however, this topology has a frequency stability challenge due to variations in the wind speed, which cause a frequency deviation that may be tolerated at high wind penetration levels [41,42]. The following concept explains how it will be resolved.…”

Section: Vsg With Diesel Generator Participation In Microgridmentioning

confidence: 99%

“…The following concept explains how it will be resolved. A diesel generator with a parallel wind turbine autonomous power system is explained in [42]. Additionally, a pulse-width modulated (PWM) converter links the AC-bus with an energy storage (for exploring virtual inertia).…”

Section: Vsg With Diesel Generator Participation In Microgridmentioning

confidence: 99%

“…An energy storage system is used to simulate the impact of the spinning mass of an SGs accumulated kinetic energy. The amount of virtual inertia is emulated in the system if the inverter is set to adjust active power inversely in relation to the rotational speed [42,43,45]. As a result, the diesel generator's inertial reaction to variations in the power demand is improved.…”

Section: Vsg With Diesel Generator Participation In Microgridmentioning

confidence: 99%

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Overview of Virtual Synchronous Generators: Existing Projects, Challenges, and Future Trends

2022

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The rapid growth in renewable energy-based distributed generation has raised serious concerns about the grid’s stability. Due to the intrinsic rotor inertia and damping feature and the voltage (reactive power) control ability, traditional bulk power plants, which are dominated by synchronous generators (SG), can readily sustain system instability. However, converter-based renewable energy sources possess unique properties, such as stochastic real and reactive power output response, low output impedance, and little or no inertia and damping properties, leading to frequency and voltage disturbance in the grid. To overcome these issues, the concept of virtual synchronous generators (VSG) is introduced, which aims to replicate some of the characteristics of the traditional synchronous generators using a converter control technique to supply more inertia virtually. This paper reviews the fundamentals, different topologies, and a detailed VSG structure. Moreover, a VSG-based frequency control scheme is emphasized, and the paper focuses on the different topologies of VSGs in the microgrid frequency regulation task. Then, the characteristics of the control systems and applications of the virtual synchronous generators are described. Finally, the relevant critical issues and technical research challenges are presented, and future trends related to this subject are highlighted.

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Section: Vsg With Diesel Generator Participation In Microgridmentioning

confidence: 99%

Section: Vsg With Diesel Generator Participation In Microgridmentioning

confidence: 99%

Section: Vsg With Diesel Generator Participation In Microgridmentioning

confidence: 99%

See 1 more Smart Citation

Overview of Virtual Synchronous Generators: Existing Projects, Challenges, and Future Trends

2022

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“…The advantage of keeping diesel generator ON is also exhibited here as it can provide grid support to help power converter such as ESS ride through abnormal voltage and frequency, which may deviate significantly due to the loss of utility grid in power-electronic converter based microgrid [24]. For such microgrids, it may be favorable that power-electronic converters can emulate the behavior of synchronous generator or provide a grid-supporting function such as voltage or frequency sensitive droop control during the unplanned islanding process [25], [26].…”

Section: Control Strategy For Transition Functionmentioning

confidence: 99%

Design and Real-Time Implementation of a Centralized Microgrid Control System With Rule-Based Dispatch and Seamless Transition Function

Sun

Joós

Ali

et al. 2020

IEEE Trans. on Ind. Applicat.

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With reference to the newly released microgrid standards, design and real-time implementation of a centralized microgrid control system is presented in this article. In the grid-connected mode, the utility grid will provide the voltage and frequency reference at the point of connection. The assets within the microgrid will follow power command references provided by the control system. In the islanded mode, the energy storage system (ESS) can provide the voltage and frequency reference to all other generators. Based on the state-of-charge of the ESS, a rule-based dispatch is proposed, with priority given to diesel generator and then the storage in the middle state of charge range. To alleviate power fluctuations, meet smooth planned islanding requirement, and compensate for the feeder losses ignored in dispatch algorithm, a supplementary slackbus power control based on closed-loop feedback and first-order filter is proposed. The potential of the storage system in firming short-time power fluctuation and providing long-term load shifting capabilities is exploited. An emergency dispatch function for unplanned islanding considering the speed of response limitation of a diesel generator is also proposed. The proposed control strategy is implemented and tested on a controller hardware-in-the-loop test bench. It demonstrates the capability of the control system to reduce load shedding and renewable curtailment, and to implement power management at the point of interconnection. Index Terms-Controller hardware-in-the-loop (C-HIL) test, microgrid control system (MGCS), rule-based dispatch, slackbus power control, smooth transition, state of charge (SoC) management.

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Adaptive Collaborative Control of Virtual Synchronous Generator in Microgrid

Zhang

2022

2022 34th Chinese Control and Decision Conference (CCDC)

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Improved virtual synchronous generator control strategy for seamless switching

Cited by 9 publications

References 12 publications

Overview of Virtual Synchronous Generators: Existing Projects, Challenges, and Future Trends

Overview of Virtual Synchronous Generators: Existing Projects, Challenges, and Future Trends

Design and Real-Time Implementation of a Centralized Microgrid Control System With Rule-Based Dispatch and Seamless Transition Function

Adaptive Collaborative Control of Virtual Synchronous Generator in Microgrid

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