Direct current anomaly identification method of power secondary control system

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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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

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