CONTROL CHARACTERISTICS EVALUATION AND MULTIPLE GENERATOR STABILITY ANALYSIS OF VOLTAGE CONTROLLED VIRTUAL SYNCHRONOUS GENERATORS

Li Zhi; Zhang Yangfan; Liu Mingbo; Liu Hui; Sun Weimin; Li Yang

doi:10.19912/j.0254-0096.tynxb.2022-0713

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (10) : 1-8. DOI: 10.19912/j.0254-0096.tynxb.2022-0713

CONTROL CHARACTERISTICS EVALUATION AND MULTIPLE GENERATOR STABILITY ANALYSIS OF VOLTAGE CONTROLLED VIRTUAL SYNCHRONOUS GENERATORS

Li Zhi¹, Zhang Yangfan², Liu Mingbo¹, Liu Hui², Sun Weimin³, Li Yang⁴

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Abstract

Through simulating the mechanical motion equation of synchronous generator, this paper proposed voltage-controlled virtual synchronous generator, designed the prime mover regulation and excitation regulation control strategy, and simulated the rotational inertial of synchronous generator, so as to improve the active support ability of renewable energy for power grid operation stability. This paper proposed five control characteristics evaluation indicators including active power-load coefficient, active power frequency regulation coefficient, reactive power voltage regulation coefficient, primary frequency regulation stable time, and reactive power voltage regulation stable time. In addition, based on Matlab/Simulink’s electromagnetic transient simulation and verification model of voltage-controlled virtual synchronous generator, the influence of different key control parameters on the performance of voltage-controlled virtual synchronous generator active frequency regulation and reactive power regulation under small disturbances, quantitative analysis the trends and laws of key indicators were analyzed. The virtual inertial, damping parameters, reactive power integral parameter and droop parameter optimization parameter range were given for engineering application. Finally, the interactive resonance mechanism of voltage-controlled virtual synchronous generators was studied by establishing the parallel grid-connected system model of multiple voltage-controlled virtual synchronous generators. The critical parameters, oscillation frequency and multi-generators parallel oscillation mode of multiple voltage-controlled virtual synchronous generators grid-connected system were obtained.

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new energy / voltage control / stability / resonance / virt synchronous generator / characteristics evaluation

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Li Zhi, Zhang Yangfan, Liu Mingbo, Liu Hui, Sun Weimin, Li Yang. CONTROL CHARACTERISTICS EVALUATION AND MULTIPLE GENERATOR STABILITY ANALYSIS OF VOLTAGE CONTROLLED VIRTUAL SYNCHRONOUS GENERATORS[J]. Acta Energiae Solaris Sinica. 2023, 44(10): 1-8 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0713

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