Transformer area three-phase imbalance treatment method and system based on multi-objective optimization

A multi-objective optimization, three-phase technology, applied in the direction of reducing the asymmetry of the polyphase network, eliminating/reducing the asymmetry of the polyphase network, complex mathematical operations, etc., can solve the imbalance management, the three-phase imbalance in the distribution station area Manage problems such as lack of scientific guidance, and achieve the effect of taking into account economic costs, good applicability and generalization, and improving the accuracy of solutions

Active Publication Date: 2021-04-23
MEASUREMENT CENT OF GUANGDONG POWER GRID CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] This application provides a multi-objective optimization-based method and system for three-phase unbalance control in a station area, which is used to solve the lack of scientific guidance for the existing three-phase unbalance control in a distribution station area, and can be used while taking into account economic costs. The technical problem of the method of quickly and effectively realizing the three-phase unbalance control in the station area

Method used

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  • Transformer area three-phase imbalance treatment method and system based on multi-objective optimization
  • Transformer area three-phase imbalance treatment method and system based on multi-objective optimization
  • Transformer area three-phase imbalance treatment method and system based on multi-objective optimization

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Embodiment 1

[0061] For ease of understanding, see figure 1 , the present application provides an embodiment of a multi-objective optimization-based three-phase unbalance control method in a station area, including:

[0062] Step 101, collecting the voltage and active power of the same frequency of the low-voltage bus in the distribution station area and all user ammeters in the distribution station area within the preset data collection period.

[0063] It should be noted that in the embodiment of this application, the voltage and active power of the same frequency of the low-voltage bus in the distribution station area should be collected in the preset data collection period first, and the preset data of all user electric meters in the distribution station area should be collected at the same time. The voltage and active power are collected at the same frequency within the cycle.

[0064] Step 102: Calculate the active current of the low-voltage bus in the distribution station area and ...

Embodiment 2

[0074] The present application provides another embodiment of a multi-objective optimization-based three-phase imbalance control method in a station area, including:

[0075] Step 201, collecting the voltage and active power of the same frequency of the low-voltage bus in the distribution station area and all the user ammeters in the distribution station area within the preset data collection period.

[0076] Step 202: Calculate the active current of the low-voltage bus in the distribution station area and the active current of the user's ammeter according to the voltage and active power.

[0077] The active current of the low-voltage bus in the distribution station area is:

[0078]

[0079] in, is the active current value of the bus in phase z at time t, A is phase A, B is phase B, C is phase C, and T is the data collection period;

[0080] The active current of the consumer ammeter is:

[0081] D=[I 1 , I 2 ,...,I j ,...,I M ]

[0082] in, is the active curr...

Embodiment 3

[0123] For ease of understanding, see figure 2 , an embodiment of a three-phase unbalance control system based on multi-objective optimization provided by this application, including:

[0124] The acquisition unit is used to collect the voltage and active power of the low-voltage bus in the distribution station area and all the user ammeters in the distribution station area at the same frequency within the preset data collection period.

[0125] The calculation unit is used to calculate the active current of the low-voltage bus in the distribution station area and the active current of the user's electric meter according to the voltage and active power.

[0126] The modeling unit is used to establish a multi-objective optimization optimal commutation mathematical model with the minimum three-phase current imbalance and the minimum commutation times according to the active current of the low-voltage bus in the distribution station area and the active current of the user's amme...

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Abstract

The invention discloses a transformer area three-phase imbalance treatment method and system based on multi-objective optimization. The method comprises the following steps: building a multi-objective optimization commutation mathematic model considering the minimum three-phase current imbalance degree and the minimum commutation frequency, and solving an optimal solution set through employing a mathematic optimization method; and selecting an optimal solution from the optimal solution set according to the emphasis target, and obtaining a treatment scheme corresponding to the optimal solution. The scientific manual phase modulation scheme is provided, the three-phase imbalance treatment of the transformer area can be quickly and effectively realized, the solving accuracy of the optimal commutation strategy is improved, the economic cost is considered, and the method and the system has better applicability and generalization performance. The technical problems that the existing three-phase imbalance treatment of the power distribution area is lack of scientific guidance, and the three-phase imbalance treatment of the area can be quickly and effectively realized while the economic cost is considered are solved.

Description

technical field [0001] This application relates to the technical field of three-phase unbalance control of distribution network, in particular to a method and system for three-phase unbalance control in a station area based on multi-objective optimization. Background technique [0002] The long-term unbalanced three-phase operation of the transformer in the distribution station will affect the safe operation of the distribution transformer and electrical equipment, and will also increase the loss of the distribution transformer and the line. Therefore, it is necessary to control the three-phase unbalance. At present, for the treatment of three-phase unbalance, the treatment methods adopted include manual commutation, intelligent commutation and phase-to-phase reactive power compensation. However, the current three-phase unbalance treatment method has the following defects: [0003] 1. The current manual commutation method relies on engineering experience and cannot consider ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/26G06F17/11
CPCH02J3/26G06F17/11H02J2203/20Y02E40/50
Inventor 杨雨瑶潘峰马键党三磊
Owner MEASUREMENT CENT OF GUANGDONG POWER GRID CO LTD
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