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AC/DC system distributed voltage control method considering control signal loss

A voltage control method and technology of AC and DC systems, which are applied in AC network circuits, information technology support systems, AC networks with the same frequency from different sources, etc. Meet the power grid control requirements and other issues to achieve the effect of improving robustness, reducing requirements, and improving long-term voltage stability

Active Publication Date: 2021-08-24
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inventor found that since each asynchronous power grid may belong to different operators, the privacy of information and the limitations of the communication system make the original centralized control unable to meet the requirements of the power grid Control requirements; in the existing voltage control strategy, there is a problem that the voltage control effect is poor or even the voltage exceeds the limit caused by the loss of the control signal

Method used

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  • AC/DC system distributed voltage control method considering control signal loss
  • AC/DC system distributed voltage control method considering control signal loss
  • AC/DC system distributed voltage control method considering control signal loss

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Embodiment 1

[0052] Embodiment 1 of the present invention provides a distributed voltage control method for an AC / DC system considering the loss of control signals, including the following process:

[0053] Obtain the parameter data of each sub-area of ​​the AC-DC system;

[0054] According to the obtained parameter data and the objective function of each sub-region, multiple optimized control sequences are obtained;

[0055]Determine whether the control signal is lost, if not, apply the first one of the control sequence, if it fails, check whether there is an optimized control sequence, if there is, apply it, if not, skip this round of control and enter the next round of control.

[0056] Sub-area division method, including the following process:

[0057] In the two regional power grids, they are interconnected through the tie line La-b. The partition method is the line copy method: select the tie line La-b as the boundary line, and the voltage amplitude V at both ends of La-b a and ph...

Embodiment 2

[0148] Embodiment 2 of the present invention provides a distributed voltage control system for AC and DC systems considering the loss of control signals, including:

[0149] The data acquisition module is configured to: acquire parameter data of each sub-area of ​​the AC-DC system;

[0150] The control sequence generation module is configured to: obtain multiple optimized control sequences according to the obtained parameter data and the objective function of each sub-region;

[0151] The voltage control module is configured to: determine whether a control signal loss occurs, and if it does not occur, apply the first one of the control sequence, if it fails, detect whether there is an optimized control sequence, apply it if it exists, and skip this one if not wheel control to enter the next round of control.

[0152] The working method of the system is the same as the AC / DC system distributed voltage control method considering the control signal loss provided in Embodiment 1,...

Embodiment 3

[0154] Embodiment 3 of the present invention provides a computer-readable storage medium, on which a program is stored. When the program is executed by a processor, the distributed voltage control of the AC / DC system considering the loss of the control signal as described in Embodiment 1 of the present invention is realized. steps in the method.

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Abstract

The invention provides an AC / DC system distributed voltage control method considering control signal loss. The method comprises the following steps: acquiring parameter data of each sub-region of an AC / DC system; obtaining a plurality of optimized control sequences according to the obtained parameter data and the target function of each sub-region; judging whether control signal loss occurs or not, if not, applying the first control sequence, if yes, detecting whether an optimized control sequence exists or not, if yes, applying the optimized control sequence, and if not, skipping the round of control and entering the next round of control. According to the method, the influence of the control signal loss on the control is considered, and the robustness of the control on the control signal loss can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of smart grid control, in particular to a distributed voltage control method for an AC / DC system considering loss of control signals. Background technique [0002] The statements in this section merely provide background art related to the present invention and do not necessarily constitute prior art. [0003] With the large-scale construction and operation of offshore wind farms, wind power is fed into multiple asynchronous AC grids through flexible multi-terminal DC (VSC-MTDC), forming an AC-DC interconnected grid. [0004] The inventors found that since each asynchronous power grid may belong to different operators, the privacy of information and the limitations of the communication system make the original centralized control unable to meet the control requirements of the power grid; in the existing voltage control strategy, there is a loss of control signal The resulting voltage control effect is poor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J13/00H02J3/06H02J3/36
CPCH02J13/00004H02J13/00006H02J3/06H02J3/36H02J2203/10H02J2203/20Y04S10/50Y04S40/12Y02E60/60Y02E40/70Y02E60/00
Inventor 张文李伟佳弓帅
Owner SHANDONG UNIV
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