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Appl. Sci. 2018, 8(4), 532; doi:10.3390/app8040532

Research on Distributed PV Storage Virtual Synchronous Generator System and Its Static Frequency Characteristic Analysis

1
Key Laboratory of Distributed Energy Storage and Micro-Grid of Hebei Province, North China Electric Power University, Baoding 071003, China
2
China Electric Power Research Institute (CEPRI), Beijing 100000, China
*
Author to whom correspondence should be addressed.
Received: 11 February 2018 / Revised: 22 March 2018 / Accepted: 23 March 2018 / Published: 30 March 2018
(This article belongs to the Special Issue Renewable Energy 2018)

Abstract

The increasing penetration rate of grid connected renewable energy power generation reduces the primary frequency regulation capability of the system and poses a challenge to the security and stability of the power grid. In this paper, a distributed photovoltaic (PV) storage virtual synchronous generator system is constructed, which realizes the external characteristics of synchronous generator/motor. For this kind of input/output bidirectional devices (e.g., renewable power generation/storage combined systems, pumped storage power stations, battery energy storage systems, and vehicle-to-grid electric vehicles), a synthesis analysis method for system power-frequency considering source-load static frequency characteristics (S-L analysis method) is proposed in order to depict the system’s power balance dynamic adjustment process visually. Simultaneously, an inertia matching method is proposed to solve the problem of inertia matching in the power grid. Through the simulation experiment in MATLAB, the feasibility of the distributed PV storage synchronous virtual machine system is verified as well as the effectiveness of S-L analysis method and inertia matching method. View Full-Text
Keywords: frequency regulation; PV storage; virtual synchronous generator; S-L analysis method; inertia matching; input/output bidirectional devices; synchronous machine grid equivalent model frequency regulation; PV storage; virtual synchronous generator; S-L analysis method; inertia matching; input/output bidirectional devices; synchronous machine grid equivalent model
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Yan, X.; Zhang, X.; Zhang, B.; Ma, Y.; Wu, M. Research on Distributed PV Storage Virtual Synchronous Generator System and Its Static Frequency Characteristic Analysis. Appl. Sci. 2018, 8, 532.

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