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On-line Evaluation Method and Terminal Equipment of Voltage Transformer Metering Accuracy

A technology of voltage transformers and evaluation methods, applied in the direction of measuring electrical variables, instruments, measuring devices, etc., can solve problems that affect the fairness and accuracy of electricity trading, threaten the safe operation of power grids, etc., and achieve the goal of improving the management level and reliability of operation and maintenance Effect

Active Publication Date: 2021-05-18
STATE GRID HEBEI ELECTRIC POWER RES INST +3
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides an online evaluation method and terminal equipment for the measurement accuracy of voltage transformers to solve the problem in the prior art that due to the physical characteristics of the CVT, the error power continues to expand during the detection cycle, which affects the power transaction. Fairness and accuracy, serious situations may even threaten the safe operation of the power grid

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  • On-line Evaluation Method and Terminal Equipment of Voltage Transformer Metering Accuracy
  • On-line Evaluation Method and Terminal Equipment of Voltage Transformer Metering Accuracy
  • On-line Evaluation Method and Terminal Equipment of Voltage Transformer Metering Accuracy

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Embodiment Construction

[0038] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0039] In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.

[0040] Such as figure 1 As shown, it is a flow chart of the steps of an online evaluation method for voltage transformer measurement accuracy provided by an embodiment of the present invention, including:

[0041] Step S101, acquiring the gateway data collected by the...

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Abstract

The invention is applicable to the technical field of electric energy measurement, and provides an online evaluation method and terminal equipment for the measurement accuracy of a voltage transformer. The method includes: obtaining the gate data collected by the data acquisition system, obtaining the standard gate data stored in the comprehensive test management platform, and determining the capacitance, dielectric loss and corresponding line loss parameter change trend of the voltage transformer according to the gate data and the standard gate data , and determine the measurement accuracy of the voltage transformer according to the capacitance, dielectric loss and the parameter change trend of the corresponding line loss. After adopting the above scheme, while improving the management level and reliability of gateway metering operation and maintenance, it also expands the online status monitoring, fault diagnosis and status evaluation of the entire metering gateway equipment, providing a powerful solution for status detection and intelligent diagnosis and evaluation of gateway metering. support.

Description

technical field [0001] The invention belongs to the technical field of electric energy measurement, and in particular relates to an online evaluation method and terminal equipment for the measurement accuracy of a voltage transformer. Background technique [0002] At present, according to the provisions of the verification regulations of electric energy metering devices, various metering devices are inspected by periodic inspection methods. However, in the actual power generation and power supply trade settlement, there will be problems such as metering device failure or out-of-tolerance every year. One of the important factors is Faults and tolerances of capacitive voltage transformers. [0003] CVT (Continuously Variable Transmission, Capacitive Voltage Transformer) is widely used in measuring voltage transformers with a voltage level of 35kV and above. Compared with electromagnetic transformers, this type of voltage transformer has lower error stability and is prone to oc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/02
CPCG01R35/02
Inventor 曹晓波申洪涛史轮马红明阎超周忠良
Owner STATE GRID HEBEI ELECTRIC POWER RES INST
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