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Method and system for studying and judging three-phase imbalance of power grid and distribution transformer terminal

A distribution transformer terminal and power grid technology, applied in the direction of multi-phase network asymmetry reduction, multi-phase network elimination/reduction of asymmetry, electrical components, etc., can solve the problems of endangering the normal operation of the motor and the impact on the safe operation of the power system, etc., to achieve Improve power utilization, reduce equipment damage, and stabilize the operating environment

Pending Publication Date: 2022-03-15
NANJING DAQO ELECTRICAL INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not only that, it will also have an adverse effect on the motor on the power supply point, endangering the normal operation of the motor
Therefore, if the three-phase imbalance exceeds the range that the distribution network can withstand, the safe operation of the overall power system will be affected

Method used

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  • Method and system for studying and judging three-phase imbalance of power grid and distribution transformer terminal
  • Method and system for studying and judging three-phase imbalance of power grid and distribution transformer terminal
  • Method and system for studying and judging three-phase imbalance of power grid and distribution transformer terminal

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Embodiment 1

[0033] An embodiment of the present invention provides a method for researching and judging a three-phase unbalance of a power grid, and the method includes the following steps:

[0034] Step 1: Collect real-time parameters of the load-side power grid according to the pre-generated power grid topology;

[0035] In the embodiment of the present invention, the power grid topology can be identified and acquired by using a pre-built topology automatic identification APP (injection type), and a primary topology file is generated after the identification is completed. During subsequent use, the grid topology can be directly read by calling the primary topology file.

[0036] The real-time parameters of the load-side power grid can be collected and obtained by the electric energy meter set on the load side. The real-time parameters of the load-side power grid that can be obtained by different electric energy meters will be different, including the power grid voltage (three-phase powe...

Embodiment 2

[0056] The present invention provides a distribution transformer terminal, which can be used to implement the method steps described in Embodiment 1. The distribution transformer terminal includes:

[0057] Acquisition module: used to collect real-time parameters of the load-side power grid according to the pre-generated power grid topology;

[0058] Interchange mining module: used to calculate the three-phase unbalance degree of the power grid according to the real-time parameters of the load-side power grid;

[0059] Research and judgment module: it is used to compare the three-phase unbalance degree of the power grid obtained through calculation with the set allowable three-phase unbalance degree, and output the judgment result of the three-phase unbalance of the power grid according to the comparison result.

[0060] In order to identify the topology of the grid, the distribution transformer terminal further includes: a topology identification module: used to identify the ...

Embodiment 3

[0063] The present invention also provides a distribution transformer terminal, which can be used to implement the method steps described in Embodiment 1, and the distribution transformer terminal includes a processor and a storage medium;

[0064] The storage medium is used to store instructions;

[0065] The processor is configured to operate according to the instructions to execute the steps of the method described in any one of the embodiments.

[0066] For details of each method step, please refer to Embodiment 1. Since the same technical concept as Embodiment 1 is adopted, the distribution transformer terminal provided in this embodiment of the present invention can also produce the same technical effect as Embodiment 1, and details are not repeated here.

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Abstract

The invention discloses a method and a system for studying and judging three-phase imbalance of a power grid and a distribution transformer terminal. The method comprises the following steps: acquiring real-time parameters of a load-side power grid according to a pre-generated power grid topology; calculating the three-phase unbalance degree of the power grid according to the real-time parameters of the load-side power grid; comparing the calculated three-phase unbalance degree of the power grid with a set three-phase allowable unbalance degree; and outputting a three-phase imbalance research and judgment result of the power grid according to a comparison result. According to the method, the three-phase imbalance of the power grid can be researched and judged in time, unnecessary electric energy loss and equipment damage are reduced, the electric energy utilization rate is improved, and a safe and stable operation environment is provided for a power distribution network reconstruction and construction scheme.

Description

technical field [0001] The invention relates to a method, system and distribution transformer terminal for researching and judging three-phase unbalance of a power grid, belonging to the technical field of electric power systems. Background technique [0002] Three-phase unbalance is an important indicator of power quality. Although there are many factors that affect the power system, the normal unbalance is mostly due to three-phase components, line parameters or load asymmetry. Since the factors of the three-phase load are not certain, the three-phase voltage and current of the power supply point are prone to unbalance, and the line is lost. Not only that, but it will also have an adverse effect on the motor on the power supply point, endangering the normal operation of the motor. Therefore, if the three-phase imbalance exceeds the acceptable range of the distribution network, the safe operation of the overall power system will be affected. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): H02J3/26H02J3/01H02J3/24
CPCH02J3/26H02J3/01H02J3/241Y02E40/40Y02E40/50
Inventor 张季曹俊岭徐大可彭宁宾雍太利
Owner NANJING DAQO ELECTRICAL INST CO LTD
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