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Substation metering device state evaluation and abnormality diagnosis method

A state evaluation and abnormal diagnosis technology, applied to measuring devices, measuring electrical variables, instruments, etc., can solve problems such as inaccurate state evaluation of measuring devices, and achieve the effect of improving operational efficiency

Active Publication Date: 2020-11-27
武汉格蓝若智能技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the technical problems existing in the prior art, the present invention provides a method for status evaluation and abnormality diagnosis of substation metering devices, which solves the problem of inaccurate status evaluation of substation metering devices in the prior art

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  • Substation metering device state evaluation and abnormality diagnosis method
  • Substation metering device state evaluation and abnormality diagnosis method
  • Substation metering device state evaluation and abnormality diagnosis method

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Embodiment 1

[0066] Embodiment 1 provided by the present invention is an embodiment of a method for status evaluation and abnormal diagnosis of a substation metering device provided by the present invention, such as figure 1 Shown is a schematic framework diagram of a substation metering device status assessment and abnormal diagnosis method provided by an embodiment of the present invention, consisting of figure 1 As can be seen, this embodiment includes:

[0067] Step 1, obtain electrical parameter data, and calculate the electrical parameter deviation degree or unbalance degree index at each moment based on the electrical parameter data; obtain the statistical characteristics of the electrical parameter deviation degree or unbalance degree index by time period.

[0068] Specifically, the electrical parameter data includes: phase-separated voltage, phase-separated current, phase-separated active power and total active power, phase-separated power factor and total power factor.

[0069...

Embodiment 2

[0141] Embodiment 2 provided by the present invention is a specific application embodiment of a substation metering device state evaluation and abnormal diagnosis method provided by the present invention. In this application embodiment, 543 gateway substation metering devices provided by a certain provincial power company are used as a case , were trained and validated. The data collection frequency of each user is 96 collection points per day, and each data collection point includes phase-separated voltage, phase-separated current, phase-separated active power and total active power, phase-separated power factor and total power factor, etc. parameter data. The gateway substation covers four voltage levels of 220kV, 110kV, 35kV and 10kV, including three-phase three-wire and three-phase four-wire wiring methods. The time span of the data is 31 days. In addition to normal cases, it also includes 9 categories such as voltage loss, current loss, phase failure, voltage unbalance, ...

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Abstract

The invention relates to a substation metering device state evaluation and abnormality diagnosis method, which comprises the steps of obtaining electrical parameter data, and calculating an electricalparameter deviation degree or unbalance degree indexes at each moment based on the electrical parameter data; obtaining statistical characteristics of electrical parameter deviation degree or imbalance degree indexes in different time periods; obtaining current symbol characteristics and data integrity characteristics of the electrical parameter data in different time periods, and establishing characteristic vectors in different time periods based on the statistical characteristics, the current symbol characteristics and the data integrity characteristics; respectively training a time-phasedstate evaluation and abnormality diagnosis model by using the characteristic vectors in a time-phased training data set and the corresponding substation metering device states; inputting the characteristic vector of a transformer substation metering device to be subjected to state evaluation and abnormality diagnosis into the state evaluation and abnormality diagnosis model in the corresponding time period, and outputting a diagnosis result. Abnormality can be found timely and accurately, the abnormality type can be diagnosed, and powerful support is provided for on-site maintenance.

Description

technical field [0001] The technical field of abnormality diagnosis of smart grid metering device of the present invention, in particular, relates to a state evaluation and abnormality diagnosis method of a substation metering device. Background technique [0002] The substation in the core part of the power grid is not only responsible for power dispatching, but also responsible for the energy metering and settlement between various regions, power generation and power consumption. Under the huge power consumption, any abnormality of the substation metering device will cause incalculable impact and loss on the inter-regional electricity bill settlement. The existing substation monitoring system pays more attention to the working status of the transformer, and lacks the necessary technical means to monitor and manage the running status of the metering device in the substation. It mainly relies on manual data analysis and on-site inspection, which is very inefficient and impos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/04
CPCG01R35/04
Inventor 窦峭奇
Owner 武汉格蓝若智能技术股份有限公司