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Direct current anomaly identification method of power secondary control system

A technology of secondary control and identification method, applied in electrical components, circuit devices, etc., can solve problems such as weak real-time monitoring of safety, and achieve the effects of reliable technical guarantee, timely monitoring, and early control failure

Inactive Publication Date: 2020-12-25
SHANGHAI YIHAO AUTOMATION CO LTD
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Problems solved by technology

[0004] In the existing safety monitoring methods of power systems, specific investigations are often performed only when actual faults occur, and the real-time safety monitoring of each key component of the power system is weak. Therefore, a method for each key component of the power system is needed. Composed of safe real-time monitoring control method

Method used

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  • Direct current anomaly identification method of power secondary control system

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Embodiment

[0023] A group of sensors based on the Hall principle (hereinafter referred to as the acquisition unit) is installed in each power circuit of the DC split screen. The characteristics meet the accuracy requirements of the 0.1a small range and the normal working range. Monitoring signal accuracy, a large range meets the DC monitoring signal accuracy requirements of the circuit breaker trip mechanism, the specific plan is as follows:

[0024] 1) DC monitoring of the status of control units such as protection devices

[0025] The acquisition unit collects the DC current working information of each protection device and other control units, sends it to the DC monitoring signal concentrator of the protection device and other control units, and sends it to the background monitoring and analysis system through the station control layer MMS (Manufacturing Message Specification) network. By analyzing the current characteristics in the normal state, comparing the performance index deviat...

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Abstract

The invention relates to a direct current anomaly identification method of a power secondary control system. The DC anomaly identification method comprises the following steps: 1, monitoring DC of a protection device (and a control unit) through an acquisition unit and obtaining a DC monitoring result; 2, performing performance monitoring on the operating state of the tripping and closing mechanism of the circuit breaker through an acquisition unit, and obtaining a performance monitoring result; 3, judging whether a direct current parasitic loop exists in the identification protection device and / or the control unit or not according to data returned by the acquisition unit, and obtaining an identification result; and 4, performing index difference comparison in different time periods by acquiring a direct current monitoring result, a performance monitoring result and a direct current parasitic loop identification result in each acquisition unit on line, and realizing direct current anomaly identification of the power secondary control system according to an index difference comparison result. Compared with the prior art, the method has the advantages of comprehensive online state analysis, clear defect direction, advanced fault pre-judgment and early warning and the like.

Description

technical field [0001] The invention relates to the technical field of power system safety, in particular to a DC abnormality identification method of a power secondary control system. Background technique [0002] The power system is an electric energy production and consumption system composed of power plants, power transmission and transformation lines, power supply and distribution stations, and power consumption. Its function is to convert the primary energy in nature into electric energy through the power generation device, and then supply the electric energy to various users through power transmission, transformation and distribution. In order to realize this function, the power system also has corresponding information and control systems in various links and different levels to measure, adjust, control, protect, communicate and dispatch the production process of electric energy, so as to ensure that users obtain safe and high-quality electric energy. . [0003] Th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J13/00
Inventor 高翔戴春怡杨晞明
Owner SHANGHAI YIHAO AUTOMATION CO LTD
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