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Power transmission line loss online analysis system and method

A line loss and analysis system technology, applied in radio wave measurement systems, satellite radio beacon positioning systems, electric vehicles, etc., can solve the problem of low accuracy of line loss information

Inactive Publication Date: 2020-09-18
STATE GRID HUBEI ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem of low accuracy of line loss information checked in the prior art, the present invention provides an online analysis system and method for transmission line loss, which provides a reliable and efficient means for statistical analysis of power grid line loss loss

Method used

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  • Power transmission line loss online analysis system and method
  • Power transmission line loss online analysis system and method
  • Power transmission line loss online analysis system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Networking between two terminal extensions, the calculated line loss information includes the transmission line loss between the substations where the two terminal extensions are located and the error of the transformer connected to the terminal extensions. The line loss information includes various types of measurement information. When the transformer error is very small, the voltage ratio difference, current ratio difference, power ratio difference, voltage angle difference, and current angle difference of line loss can be calculated as follows.

[0079] Among them, the line loss information includes the voltage ratio difference, and the process of calculating the voltage ratio difference includes:

[0080] The effective value of the first voltage is determined according to the voltage information in the data packet generated by the first extension terminal.

[0081] The effective value of the second voltage is determined according to the voltage information in the d...

Embodiment 2

[0114] When the terminal extension and the terminal host are on a metering line, the terminal extension and the terminal host are connected to a network, and the calculated line loss information is the secondary voltage drop loss of the voltage transformer. The secondary voltage drop loss information of the voltage transformer includes various types of electrical parameter error values, wherein the secondary voltage drop loss information includes the secondary circuit voltage drop error, and the process of calculating the secondary circuit voltage drop error includes:

[0115] pass

[0116]

[0117] Calculate the online monitoring error of the PT secondary circuit voltage drop, where f is the voltage ratio difference, and δ is the voltage angle difference.

[0118] Among them, the secondary voltage drop loss information also includes the electric energy measurement error caused by the secondary voltage drop, and the process of calculating the electric energy measurement err...

Embodiment 3

[0123] When the terminal extension and the terminal host are not on the same metering line, the network between the terminal extension and the terminal host, the calculated line loss information includes the loss of the transmission line between the substations where the two terminal extensions are located, the voltage transformer and current mutual inductance in the transmission line The error of the transformer and the secondary voltage drop loss of the voltage transformer on the terminal host side.

[0124] Through the line loss calculation of different ad hoc network lines, analyze the relationship between the sum of the settlement results of embodiment 1 and embodiment 2 and embodiment 3 at the same time, because the line loss information is calculated according to the synchronized data packets, the line loss is improved The accuracy of information calculation avoids the situation that the accuracy of the line loss information calculated according to the data packet is low...

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Abstract

The invention provides a power transmission line loss online analysis system and method, and the system comprises a terminal extension and a terminal host, and time information synchronization is carried out between the terminal extension and the terminal host and between the terminal extension and the terminal extension through a clock synchronization module; the terminal extension sets communicate with the terminal host through communication modules, and the terminal extension sets communicate with each other through communication modules; and the line loss management platform receives the measurement information of the terminal extension set and the terminal host, matches the time information in the measurement information, and determines corresponding line loss information according tothe corresponding measurement information if the time information in the measurement data between the terminal extension set and the terminal host and between the terminal extension sets is matched.According to the invention, a reliable and efficient means is provided for grid line fault loss statistical analysis.

Description

technical field [0001] The invention relates to the technical field of power grid loss statistical analysis, in particular to an on-line analysis system and method for transmission line loss. Background technique [0002] When the high-voltage transmission line is transmitted to the secondary side electric energy meter, its main losses include the loss of the high-voltage transmission line, the error of the voltage transformer, the error of the current transformer, the secondary voltage drop of the voltage transformer and the error of the electric energy meter. The inspection of the line is only for the high-voltage transmission line corresponding to the transformer or the line between the voltage transformer and the main control room, and the calculation data time for the overall error between the two is not synchronized, so The calculated line loss information is less accurate. Contents of the invention [0003] Aiming at the problem of low accuracy of line loss informa...

Claims

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Application Information

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IPC IPC(8): G01R31/08G01R22/06G01R21/00G01R19/02G01R27/26G01S19/25
CPCG01R31/086G01R22/063G01R21/00G01R19/02G01R27/2694G01S19/256G01R19/2513
Inventor 汪司珂唐登平俞德华明东岳姚鹏郑欣郭雨庞博夏天蔡文嘉石洪李帆郭玥王琪王信李君王尚鹏黄明姚红邓琼潘志项勇郭沁
Owner STATE GRID HUBEI ELECTRIC POWER RES INST
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