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Virtual power grid adaptive control strategy optimization method and device and terminal equipment

A technology of self-adaptive control and self-adaptive controller, applied in the field of electric power, can solve problems such as poor dynamic characteristics of AC faults, achieve good dynamic characteristics, improve safety, and reduce the risk of resonance

Pending Publication Date: 2021-06-11
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a virtual grid adaptive control strategy optimization method, device and terminal equipment, which are used to solve the problem of using the existing virtual grid adaptive controller to suppress the high-frequency resonance of the flexible direct current transmission line. There will be technical problems with poor dynamic characteristics during failure recovery

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  • Virtual power grid adaptive control strategy optimization method and device and terminal equipment
  • Virtual power grid adaptive control strategy optimization method and device and terminal equipment
  • Virtual power grid adaptive control strategy optimization method and device and terminal equipment

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Embodiment 1

[0048] figure 1 It is a flow chart of the steps of the method for optimizing the adaptive control strategy of the virtual grid described in the embodiment of the present invention, figure 2 It is a tracking principle diagram of the virtual grid adaptive controller in the optimization method of the virtual grid adaptive control strategy described in the embodiment of the present invention.

[0049] Such as figure 1 with figure 2 As shown, the embodiment of the present invention provides an optimization method for the adaptive control strategy of the virtual grid, which is applied to the flexible direct current transmission system and is suitable for pre-installation in the feedforward link of the current inner loop controller in the flexible direct current transmission system A virtual grid adaptive controller, the optimization method includes the following steps:

[0050] S10. When the flexible DC transmission system starts the virtual grid adaptive control strategy, the ...

Embodiment 2

[0072] Figure 5 It is a frame diagram of the optimization device for the virtual grid adaptive control strategy described in the embodiment of the present invention.

[0073] Such as Figure 5 As shown, the embodiment of the present invention also provides an optimization device for the adaptive control strategy of the virtual grid, which is applied to the flexible direct current transmission system and is suitable for pre-installation in the feedforward link of the current inner loop controller in the flexible direct current transmission system A virtual grid adaptive controller, the optimization device includes a voltage acquisition module 10, a first execution module 20, a second execution module 30, a third execution module 40, a fourth execution module 50, a fifth execution module 60 and a sixth execution module 70;

[0074] The voltage acquisition module 10 is used to start the virtual grid adaptive control strategy according to the flexible direct current transmissio...

Embodiment 3

[0086] An embodiment of the present invention provides a computer-readable storage medium. The computer storage medium is used to store computer instructions, and when the computer is run on the computer, the computer executes the optimization method for the above-mentioned virtual grid adaptive control strategy.

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Abstract

The invention relates to a virtual power grid adaptive control strategy optimization method and device and terminal equipment, which are applied to a flexible direct current power transmission system. According to the virtual power grid adaptive control strategy optimization method and the device and the terminal equipment, a virtual power grid adaptive control strategy is controlled to be switched among a first link, a second link and a third link according to the actual alternating current voltage of an alternating current side of a flexible direct current converter of the flexible direct current power transmission system, the risk of resonance of the flexible direct current power transmission system can be reduced, so that the flexible direct current power transmission system can obtain better dynamic characteristics at the moment of fault and in the fault recovery process, damage to a load (a device or equipment) caused by overstress generated by the flexible direct current power transmission system is avoided, and the DC fault ride-through safety of the flexible DC power transmission system is improved; and the problem that when an existing virtual power grid self-adaptive controller is adopted to suppress high-frequency resonance of a flexible direct-current power transmission line, the dynamic characteristic is poor in the alternating-current fault recovery process is solved.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to an optimization method, device and terminal equipment for a virtual power grid adaptive control strategy. Background technique [0002] Flexible DC transmission is the development trend of power systems in the future. Several key technical problems need to be solved in the application of flexible DC transmission. One of them is to suppress the high-frequency resonance between flexible DC and AC systems. The high-frequency resonance is mainly caused by flexible DC transmission. The negative impedance of the flexible DC converter amplifies the harmonics of the transmission system, and it is also caused by the impedance mismatch between the flexible DC converter and the AC system. The high-frequency resonance is mainly related to the control link delay and feed-forward strategy of flexible DC transmission. For this high-frequency resonance, the main solution in the current ...

Claims

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Application Information

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IPC IPC(8): H02J3/36H02J3/01H02J3/00
CPCH02J3/36H02J3/01H02J3/00125H02J2003/365Y02E60/60Y02E40/40
Inventor 李桂源黄伟煌饶宏李岩许树楷赵晓斌
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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