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A virtual inertia testing method and measuring device for a virtual synchronous generator

A virtual synchronization and testing device technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the serious problems of power grid stability, the lack of inertia and frequency modulation and voltage regulation control characteristics, and the uncontrollability of primary energy. Achieve the effect of reducing relative inertia and reducing frequency stability

Active Publication Date: 2021-10-29
CHINA ELECTRIC POWER RES INST +1
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  • Claims
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AI Technical Summary

Problems solved by technology

Due to the intermittent and uncontrollable nature of primary energy, and the conventional distributed grid-connected power generation control mostly adopts the power electronic grid-connected inverter mode, which does not reflect the inherent inertia and frequency modulation and voltage regulation control characteristics of conventional power systems. This makes the grid stability problem more serious

Method used

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  • A virtual inertia testing method and measuring device for a virtual synchronous generator
  • A virtual inertia testing method and measuring device for a virtual synchronous generator
  • A virtual inertia testing method and measuring device for a virtual synchronous generator

Examples

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Embodiment

[0073] The test takes the wind turbine virtual synchronous generator as an example, connects the grid disturbance generating device in series between the virtual synchronous generator and the power grid, and the test wiring is as attached figure 1 shown. The virtual synchronous generator is given a terminal frequency f = 49.5Hz, and the frequency change rate is 1Hz / s. The test results are as follows:

[0074] Attached Figure 2 is the waveform diagram of the inertia test of the virtual synchronous generator. It can be seen from Figure 2(a) that at the moment the grid frequency drops, the virtual synchronous generator quickly responds to the active power support, and the active power change is 0.1p.u. It can be seen from Figure 2(b) that the wind speed is basically stable during the virtual synchronous generator inertia test. It can be seen from Figure 2(c) that when the virtual synchronous generator test starts, the generator speed is about 1030r / min, and at the end, the gene...

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Abstract

The invention relates to a virtual inertia testing method of a virtual synchronous generator and a measuring device thereof. The test method includes step 1: connecting the virtual synchronous generator and the test device; step 2: determining the frequency change rate of the grid simulation device; step 3: determining the quantitative relationship between the inertia time constant and the actual output active power. The test device includes a grid simulation device, one end of which is connected to the virtual synchronous generator, and the other end is connected to the grid. The invention provides a method for measuring the virtual inertia of the virtual synchronous generator, and lays a solid foundation for the design of the control system of the virtual synchronous generator and participating in the frequency regulation of the power grid.

Description

technical field [0001] The invention relates to virtual testing technology of a virtual synchronous generator, in particular to a virtual inertia testing method of a virtual synchronous generator and a measuring device thereof. Background technique [0002] In recent years, due to factors such as energy, environment, and technology, the field of new energy has received extensive attention and development, and the penetration rate of distributed power sources in power systems has continued to increase. At the same time, the proportion of traditional synchronous generators has gradually decreased. The rotating reserve capacity and moment of inertia are relatively reduced. Due to the intermittent and uncontrollable nature of primary energy, and the conventional distributed grid-connected power generation control mostly adopts the power electronic grid-connected inverter mode, which does not reflect the inherent inertia and frequency modulation and voltage regulation control cha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCG01R31/088
Inventor 代林旺王瑞明李少林孙勇陈晨张利王莹莹于雪松高永恒张宗岩
Owner CHINA ELECTRIC POWER RES INST
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