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A Parameter Measurement Method of Photovoltaic Virtual Synchronous Generator

A virtual synchronization and generator technology, applied in photovoltaic power generation, photovoltaic system monitoring, photovoltaic modules, etc., can solve the problems of grid-connected performance technical regulations and test procedures blank, no unified test method, etc., to achieve simple construction and test steps simple effect

Active Publication Date: 2020-10-13
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology

At present, there is no unified test method for photovoltaic virtual synchronous generators with different technical routes, and the technical regulations and test procedures for grid-connected performance of virtual synchronous generators at home and abroad are blank. The New Energy Research Center of China Electric Power Research Institute undertakes the enterprise standard The compilation of "Unitized Photovoltaic Virtual Synchronous Generator Technical Requirements and Test Methods" and the testing of photovoltaic virtual synchronous generator are currently in their infancy

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  • A Parameter Measurement Method of Photovoltaic Virtual Synchronous Generator
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  • A Parameter Measurement Method of Photovoltaic Virtual Synchronous Generator

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Embodiment

[0049] in such as figure 2 In the application environment shown, the 40kW photovoltaic virtual synchronous generator, the nominal phase voltage is 220V, and the frequency is 50Hz. The measurement steps of the damping coefficient and moment of inertia of the photovoltaic virtual synchronous generator include:

[0050] A 40kW photovoltaic virtual synchronous machine, the nominal phase voltage is 220V, and the frequency is 50Hz. The moment of inertia test procedure is as follows:

[0051] (1) Initial operating state: Off-grid full-load operation, rated power 40kW, connected to 40kW resistive load, voltage amplitude 311V, frequency 50Hz.

[0052] (2) The photovoltaic virtual synchronous generator operates in off-grid mode;

[0053] (3) The initial state of switch K1 is closed to adjust the photovoltaic array simulator, the first resistive load and the second resistive load, wherein the first resistive load is connected to 90% of the total resistive load of the photovoltaic virt...

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Abstract

The present invention relates to a parameter measurement method of a photovoltaic virtual synchronous generator. The method comprises the following steps that: the parameter measurement structure of the photovoltaic virtual synchronous generator is established, wherein the parameter measurement structure of the photovoltaic virtual synchronous generator comprises a photovoltaic array / photovoltaicarray simulator, a photovoltaic virtual synchronous generator, a data acquisition device, a first damping load, a switch K1 and a second damping load, wherein the photovoltaic virtual synchronous generator operates in an off-grid mode; and the parameters of the devices in the parameter measurement structure are adjusted, so that the damping coefficient and rotational inertia of the photovoltaic virtual synchronous generator are determined. With the parameter measurement method provided by the invention, the damping coefficients and rotational inertias of various photovoltaic virtual synchronous generators can be determined, and a sound foundation is provided for the formulation of the related standards of photovoltaic virtual synchronous generators.

Description

technical field [0001] The invention relates to the field of photovoltaic detection, in particular to a method for measuring parameters of a photovoltaic virtual synchronous generator. Background technique [0002] Due to the low inertia level of traditional photovoltaic power stations, as the proportion of large-scale photovoltaic access to the grid increases, the inertia level of the power system will decrease, affecting the safe and stable operation of the system. In order to promote the large-scale development and utilization of new energy, the State Grid Corporation of China has carried out the construction of a virtual synchronous machine demonstration project (phase I) with a total capacity of 140MW at the Zhangbei wind-solar storage base, providing a typical demonstration for the construction of a grid-friendly new energy power station. [0003] There is no strict definition of photovoltaic virtual synchronous generator. It is generally considered to be a device or d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02S50/10
CPCH02J3/383H02J2203/20H02S50/10Y02E10/56
Inventor 张晓琳郑飞张军军秦筱迪董玮黄晶生李臻陈志磊
Owner CHINA ELECTRIC POWER RES INST
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