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Power distribution network voltage control method based on virtual synchronous generator type distributed generation

A technology of virtual synchronous power generation and voltage control method, which is applied in the direction of AC network voltage adjustment, single-network parallel feeding arrangement, reactive power compensation, etc. Power grid ADN public bus PCC voltage fluctuations and other issues, to achieve high flexibility and reliability margins, solve power distribution problems, and avoid overload effects

Active Publication Date: 2017-03-22
JIANGSU ELECTRIC POWER CO +1
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AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the invention is: the existing VSG-DG control method cannot simulate the external characteristics of the synchronous generator well and cannot suppress the voltage fluctuation of the common bus PCC of the active distribution network ADN

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  • Power distribution network voltage control method based on virtual synchronous generator type distributed generation
  • Power distribution network voltage control method based on virtual synchronous generator type distributed generation
  • Power distribution network voltage control method based on virtual synchronous generator type distributed generation

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Embodiment Construction

[0031] The present invention will be described below in conjunction with the accompanying drawings and embodiments.

[0032] Such as figure 2 As shown, a VSG-DG of the present invention includes a primary circuit and a VSG-DG control system, and the VSG-DG control system mainly includes a voltage and current acquisition module, a power calculation module, an active power-frequency control module, a reactive power-voltage control module, and a voltage conversion Module, voltage compensation control module, DC voltage control module and current control module, the voltage and current acquisition module is used to collect the inner loop current value of VSG-DG, the output current value and the voltage value of the PCC where the VSG-DG is connected to the grid, the voltage and current The output terminal of the acquisition module is connected to the input terminal of the power calculation module, the input terminal of the reactive power-voltage control module and the input termin...

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Abstract

The invention discloses a power distribution network voltage control method based on virtual synchronous generator type distributed generation. A VSG-DG control system used by the method acquires inner-loop current and output current of a VSG-DG and voltage at a PCC portion of a VSG-DG integrated net through a voltage / current acquisition module. Through a power calculation module, an active-frequency control module and a reactive-voltage control module, an active frequency modulation function and a wattles voltage regulation function of a synchronous power generator are simulated. Furthermore through a voltage converting module, a voltage compensation control module, a DC voltage control module and a current control module, consistency between an output external characteristic of the VSG-DG and the external characteristic of the synchronous power generator is realized, wherein the reactive-voltage control module adaptively set a PCC voltage compensation reference value according to a PCC voltage fluctuation condition, thereby effectively restraining voltage fluctuation at the PCC portion.

Description

technical field [0001] The invention belongs to the field of power quality management of active distribution networks for distributed generation, and in particular relates to a distribution network voltage control method based on a virtual synchronous generator type distributed power supply. Background technique [0002] The traditional distribution network usually relies on a flexible network structure and a large capacity margin to cope with the uncertainty of the load, so as to ensure the safety and reliability of the power system, and its operation control method is relatively simple. In the past ten years, the rapid development of power electronics technology has solved the problem of grid-connected operation of distributed generation (DG) in the medium and low voltage distribution network, and promoted the wide application of DG at all levels of the power system. However, the traditional distribution network still has problems such as insufficient renewable energy cons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/16H02J3/46
CPCH02J3/16H02J3/46Y02E40/30
Inventor 张玮亚汤文洁盛欢金萍张玉斌陈志祥时敏陈红周翔李琳郭政陈文君王梦蔚桂帆
Owner JIANGSU ELECTRIC POWER CO
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