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Active power distribution network voltage control method and system for suppressing influence of communication interruption

A communication interruption and distribution network technology, which is applied in the direction of power network operating system integration, AC network voltage adjustment, information technology support system, etc., can solve the problem of inability to control voltage finely, and achieve the effect of fine control effect

Pending Publication Date: 2022-05-13
CHINA ELECTRIC POWER RES INST +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the local voltage control in the prior art cannot finely control the voltages of all voltage off-limit nodes, the present invention proposes an active distribution network voltage control method that suppresses the impact of communication interruptions, including:

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  • Active power distribution network voltage control method and system for suppressing influence of communication interruption
  • Active power distribution network voltage control method and system for suppressing influence of communication interruption
  • Active power distribution network voltage control method and system for suppressing influence of communication interruption

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Embodiment 1

[0062] An active distribution network voltage control method that suppresses the effects of communication interruptions, such as figure 1 Shown:

[0063] S1: Based on the communication information of each node, determine the location of the communication interrupted node and the normal communication node closest to the interrupted node;

[0064] S2: Collect multi-dimensional information of the active distribution network, and calculate the voltage amplitude of the interruption node based on the multi-dimensional information;

[0065] S3: Based on the multi-dimensional information and the voltage amplitude of the interruption node, it is brought into the pre-built multi-node Q-V droop control model to obtain the reactive power that needs to be compensated for each node whose voltage exceeds the limit;

[0066] S4: sending the reactive power required to be compensated by each node with a voltage exceeding the limit to the normal communication node with voltage regulation capabi...

Embodiment 2

[0113] Relying on the CPS simulation platform of the distribution network and the IEEE33 node calculation example, the experimental simulation is carried out. For example Figure 8 As shown, the voltage of the head-end power supply is 10kV and remains constant, and the specific parameters are shown in the appendix. Here, in order to reflect the CPS characteristics of the active distribution network and the scene of multi-point voltage regulation, it is assumed that all nodes in the entire network are three-remote nodes. According to the natural distribution of voltage, three settings are made at nodes 5, 17, 25, and 32 According to the voltage regulating equipment model of the Q-V droop control method proposed in this paper, distributed power supplies are set at nodes 11, 17, and 32, and the output value is an average value of 200kW+j200kvar, and the variance is a random value of 100kW+j100kvar. Compared with the main network Access power capacity, the active power fluctuatio...

Embodiment 3

[0121] Based on the same inventive concept, the present invention also provides an active distribution network voltage control system that suppresses the impact of communication interruption, including:

[0122] A positioning module, configured to determine the location of a communication interrupted node based on the communication information of each node, and the node with the closest normal communication distance to the interrupted node;

[0123] The collection and calculation module is used to collect multi-dimensional information of the active distribution network, and calculate the voltage amplitude of the interruption node based on the multi-dimensional information;

[0124] The reactive power calculation module is used to import the pre-built multi-node Q-V droop control model based on the multi-dimensional information and the voltage amplitude of the interrupted node to obtain the reactive power required to be compensated for each voltage limit node;

[0125] A distri...

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Abstract

The invention provides an active power distribution network voltage control method and system for suppressing communication interruption influence. The method comprises the following steps: judging a communication interruption node position and a normal communication node closest to the interruption node position based on communication information of each node; collecting multi-dimensional information of the active power distribution network, and calculating a voltage amplitude of the interrupt node based on the multi-dimensional information; substituting the multi-dimensional information and the voltage amplitude of the interrupt node into a pre-constructed multi-node Q-V droop control model to obtain reactive power needing to be compensated for by each voltage out-of-limit node; issuing the reactive power required to be compensated for by each voltage out-of-limit node to a normal communication node with voltage regulation capability; wherein the multi-node Q-V droop control model is constructed based on a principle that a main network power supply remains unchanged. According to the technical scheme of the invention, the multi-node Q-V droop control model is adopted to realize on-site voltage regulation, so that a finer control effect on voltage out-of-limit nodes is realized.

Description

technical field [0001] The invention relates to the field of active distribution network voltage control, in particular to an active distribution network voltage control method and system for suppressing the influence of communication interruption. Background technique [0002] At present, the voltage control strategies in the distribution network can be mainly divided into three types: centralized, distributed and local control. [0003] Centralized voltage control uses a master station system to input all the status information of each node in the entire network, and then sends control commands to the voltage regulation equipment terminals at each voltage regulation node after corresponding control strategies. Centralized voltage control is more dependent on the communication system, and requires a lot of communication resources. It needs to collect global information, perform optimization calculations, and then give corresponding instructions. Therefore, the processing ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/16H02J3/14
CPCH02J3/16H02J3/144H02J2203/20Y02B70/3225Y04S20/222
Inventor 何辉梁英刘科研魏雨涵
Owner CHINA ELECTRIC POWER RES INST
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