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Method and device for optimal configuration of power distribution low-voltage compensation equipment

A technology for compensating equipment and optimizing configuration, applied in the field of distribution network, can solve problems such as the inability to solve the problem of optimal configuration of power electronic voltage regulation equipment, complex topology of distribution network lines, etc.

Active Publication Date: 2022-03-01
国网青海省电力公司果洛供电公司 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The distribution network line topology is complex, and there are many possibilities in the distribution of power supply, user load characteristics connected to each node, and load distribution. Therefore, it is impossible to solve the problem of optimal configuration of power electronic voltage regulation equipment only by simple judgment.

Method used

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  • Method and device for optimal configuration of power distribution low-voltage compensation equipment
  • Method and device for optimal configuration of power distribution low-voltage compensation equipment
  • Method and device for optimal configuration of power distribution low-voltage compensation equipment

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Effect test

Embodiment 1

[0056] (1) Assumptions

[0057] The method of the present invention is applied in the low-voltage distribution network, adopting the following assumptions:

[0058] 1) Due to the fast adjustment speed of low-voltage compensation equipment, the transient process of voltage adjustment of low-voltage compensation equipment can be ignored in the process of distribution network voltage calculation, and the adjustment results can be directly given.

[0059] 2) The working mode of the distribution network low-voltage compensation equipment applied in the present invention is the voltage amplitude adjustment mode, and the voltage phase is not adjusted.

[0060] 3) Due to the fast adjustment speed of the low-voltage compensation equipment, the change of the injected power of the node power supply during the voltage adjustment process is ignored, and only the load change caused by the voltage change is considered.

[0061] (2) Simplified model of distribution low-voltage compensation e...

Embodiment 2

[0116] An optimal configuration device for power distribution low-voltage compensation equipment, including the following modules:

[0117] Distribution network power flow calculation module: calculate the distribution network power flow before and after the installation of low voltage compensation equipment, and obtain the voltage and voltage variation of each node.

[0118] Voltage unqualified node set building module: establish a voltage unqualified node set in the distribution network system;

[0119] Node voltage sensitivity calculation module: calculate the node voltage sensitivity of the remaining unqualified nodes in the voltage unqualified node set to the voltage adjustment nodes after each unqualified node in the voltage unqualified node set installs the voltage regulation equipment;

[0120] Voltage comprehensive adjustment ability calculation module: calculate the voltage comprehensive adjustment ability of each unqualified node;

[0121] Apparent capacity acquisi...

Embodiment 3

[0123] Take the actual distribution network as an example, as attached figure 2 As shown, the method of Embodiment 1 is used to optimize the configuration. The topological structure of the distribution network and the node numbers of the distribution network system are identified in the figure for topology identification, and the node numbers are 1-15. All loads are connected to each node through distribution transformers. S in the figure is the equivalent system power at the substation side.

[0124] (1) Voltage data before installing the equipment

[0125] The example distribution network contains 15 load nodes, the rated voltage of the distribution line is 10kV, the voltage of the substation side outgoing line (equivalent power supply S) is fixed at 10.5kV, and the actual line voltage under the typical operation mode without installing low-voltage compensation equipment is shown in the table 1.

[0126] Table 1 Voltage data before installation of equipment

[0127] ...

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Abstract

The present invention relates to a method for optimal configuration of power distribution low-voltage compensation equipment and equipment for implementing the method. The optimal configuration method includes the following steps: S01: establish a set of unqualified voltage nodes in a distribution network system; After the node is installed with voltage regulation equipment, the node voltage sensitivity of the other nodes to the voltage regulation node; the node voltage sensitivity obtained in S03 calculates the comprehensive voltage regulation ability of each node; S04 establishes constraints, and calculates the voltage unqualified node with the largest voltage comprehensive regulation capability The apparent capacity of the equipment required for the installation of voltage regulation equipment; S05 recalculate the power flow of the distribution network after configuring low voltage compensation and equipment, obtain the set of unqualified voltage nodes after installing low voltage compensation equipment, and repeat steps S04‑S05 until the voltage is unqualified The number of nodes in the node set is zero. The invention obtains the optimal configuration location and configuration capacity data of the equipment under the premise of ensuring that the voltage meets the standard.

Description

technical field [0001] The invention belongs to the technical field of power distribution network, and in particular relates to an optimal configuration method of power distribution low-voltage compensation equipment. Background technique [0002] In recent years, with the improvement of users' requirements for power quality, the problem of low-voltage over-limit of distribution network has attracted more and more attention. Due to the long construction period, fast load growth rate and changes in load characteristics of some distribution networks, problems such as voltage instability and voltage limit violations appear on the user side. In order to control the problem of low voltage exceeding the limit in the distribution network, voltage regulation equipment or reactive power compensation equipment is usually installed on nodes with too low voltage, and the voltage can be increased by increasing the voltage on the load side of the distribution transformer or reducing the f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/06H02J3/12
CPCH02J3/06H02J3/12H02J2203/10H02J2203/20
Inventor 杨森林范越马丽山庞泊王生宏王磊丁元杰董顺虎王铁军韩俊垚杨永东山发柏刘小庆陈文君李学荣杨占福杨正陈旭桦孙立夫
Owner 国网青海省电力公司果洛供电公司