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A method and system for abnormal detection of secondary measurement circuits in substations and switching stations

A secondary measurement and anomaly detection technology, which is applied in the direction of measuring electricity, measuring devices, and measuring electrical variables, etc., can solve problems such as wrong phase sequence connection of the secondary circuit of the transformer, insufficient sensitivity of technical means, abnormal data acquisition system, etc., to achieve Effects of improving reliability and sensitivity, ensuring time synchronization, and reducing abnormal loss

Active Publication Date: 2022-02-01
北京天能继保电力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] In substations and switchyards, there are many switches in the incoming and outgoing lines of each section of the busbar. The voltage and current transformer secondary circuit wiring of each switch is complicated, and there are many intermediate links. If the abnormality of the secondary measurement circuit of the switch cannot be detected in time , which will lead to problems such as wrong connection of the phase sequence of the secondary circuit of a certain transformer, reverse polarity connection, disconnection or abnormality in the data acquisition system of the terminal equipment of the switch, which will affect the normal and safe operation of the power grid system;
[0003] In the existing technology, the method for monitoring the abnormality of the voltage and current transformer secondary circuits of each switch includes using the secondary terminal equipment installed in the circuit breaker switch to monitor the operating status of the primary equipment of the power system or passing the detection PT, CT is a technical means to find abnormality when disconnection, but these technical means have the problem of insufficient sensitivity

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  • A method and system for abnormal detection of secondary measurement circuits in substations and switching stations
  • A method and system for abnormal detection of secondary measurement circuits in substations and switching stations
  • A method and system for abnormal detection of secondary measurement circuits in substations and switching stations

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Embodiment 2

[0090] image 3 It shows a schematic structural diagram of an abnormality detection system for a secondary measurement circuit of a substation and a switchyard according to an embodiment of the present invention, as shown in image 3 As shown, the system may include:

[0091] The acquisition module is used to adjust the time of the terminal equipment corresponding to the switch on the bus, and acquire the three-phase voltage of the terminal equipment corresponding to the switch with the time stamp;

[0092] The detection module is used to use the three-phase voltage of the terminal equipment corresponding to the switch with the same time mark to perform abnormal detection on the busbar, the secondary measurement circuit of the voltage transformer of the switch on the busbar and the secondary measurement circuit of the current transformer of the switch on the busbar .

[0093] Wherein, the time calibration of the terminal equipment corresponding to the switch on the bus may inc...

Embodiment 3

[0124] Figure 4 The main wiring diagram of the single busbar form of the power system switching station showing the abnormal detection method of the secondary measurement circuit of the substation and the switching station according to the embodiment of the present invention, as shown in Figure 4 As shown, the switch KG1 is a loop-in switch, the switch KG2 is a loop-out switch, and the switches KG3~KG6 are feeder switches. The direction of power flows into the bus from the switch KG1, and flows out of the bus from the switches KG2~6.

[0125] An operation and maintenance workstation is configured in the whole system, and a terminal device is respectively installed in the switches KG1~KG6, and the numbers are recorded as ZD1~ZD6. Used to collect their own voltage and current, and then send the voltage and current data to the operation and maintenance workstation, which summarizes all the data, and calculates the effective value of the voltage of each switch, the negative sequ...

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Abstract

The present invention relates to a method and system for abnormality detection of a secondary measurement circuit in a substation and a switching station. The method includes: correcting the time of the terminal equipment corresponding to the switch on the bus, and obtaining the three times of the terminal equipment corresponding to the switch with a time mark. Phase voltage, use the three-phase voltage of the terminal equipment corresponding to the switch with the same time mark to detect the abnormality of the busbar, the secondary measurement circuit of the voltage transformer of the switch on the busbar and the secondary measurement circuit of the current transformer of the switch on the busbar, adopt The above-mentioned technical solution can quickly detect the abnormal situation of the secondary measurement of the substation and the switch station, and effectively improve the detection sensitivity.

Description

technical field [0001] The invention relates to the field of abnormal detection of power systems, in particular to a method and system for detecting abnormalities of secondary measurement circuits in substations and switching stations. Background technique [0002] In substations and switchyards, there are many switches in the incoming and outgoing lines of each section of the busbar, and the wiring of the secondary circuit of the voltage and current transformers of each switch is complicated, and there are many intermediate links. If the abnormality of the secondary measurement circuit of the switch cannot be detected in time , which will lead to problems such as wrong connection of the phase sequence of the secondary circuit of a certain transformer, reverse polarity connection, disconnection or abnormality in the data acquisition system of the terminal equipment of the switch, which will affect the normal and safe operation of the power grid system; [0003] In the existi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00G01R31/50G01R31/08G01R31/327G01R19/00
CPCG01R19/0084G01R31/00G01R31/086G01R31/327G01R31/50
Inventor 陈艳河白彦锋庄乾鑫
Owner 北京天能继保电力科技有限公司
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