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Testing method for dynamic simulation of linkage between protective channel faults and line faults

A dynamic simulation test and line fault technology, which is applied in the test field, can solve the problems of increased probability of protection being exited by the channel, and achieve the effects of improving power reliability, ensuring safe operation, and reducing impact

Active Publication Date: 2014-03-05
STATE GRID CORP OF CHINA +1
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Problems solved by technology

In this way, since each set of protection has only one channel, once the channel fails, the main protection needs to be taken out of operation. When the multiplexed channel passes through many sites and the distance is long, the probability of the protection being affected by the channel to exit is also doubled. Increase

Method used

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  • Testing method for dynamic simulation of linkage between protective channel faults and line faults
  • Testing method for dynamic simulation of linkage between protective channel faults and line faults
  • Testing method for dynamic simulation of linkage between protective channel faults and line faults

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] established as figure 1 The dynamic simulation system of the 100km non-mutual inductance double-circuit transmission line is shown. The simulated generator G is used to simulate the equivalent system of the N-side power plant, and the infinite transformer W is used to simulate the equivalent system of the L-side grid. Line 2 is used as the protected line, and optical fiber differential line protection devices are arranged on both sides. The optical fiber differential line protection device collects the voltage and current of TA_N, TV_N, TA_L, TV_L. The line fault point FD1 is set for line 1, and the line fault point FD2 is set for line 2. Each fault point is used to simulate various types of metallic or short-circuited faults through transition resistance.

[0027] Establish a two-way bidirectional optical fiber channel connecting the N-side optical...

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Abstract

The invention provides a testing method for dynamic simulation of linkage between protective channel faults and line faults. The testing method for dynamic simulation of linkage between the protective channel faults and the line faults comprises the following steps of (1) establishing a dynamic simulation system, arranging a line fault switch loop, (2) building an optical fiber direct-connection channel and an SDH multiplexing channel, assembling an optical fiber differential line protective device, (3) simulating linkage between the channel faults and the line faults, and (4) recording a linkage time sequence of interruption of the line faults and disconnection of the channel faults. According to the testing method for dynamic simulation of linkage between the protective channel faults and the line faults, the linkage time sequence can be accurately controlled to be at the millisecond level, and the requirements of dual-channel applicability tests and research on line protection are met. By the adoption of the tests, it is ensured that when the line faults happen along with single-channel faults, a main protection function of a line protective device connected to dual channels cannot be influenced by the single-channel faults, the line faults can still be rapidly and reliably removed, safe operation of power equipment is ensured, impact borne by a power grid is reduced to the maximum extent, safety of a power grid system is ensured, and power consumption reliability of power consumers is improved.

Description

technical field [0001] The invention relates to a test method, in particular to a dynamic simulation test method for the linkage between protection channel faults and line faults. Background technique [0002] In recent years, with the rapid development of optical fiber technology, optical fiber channel has become the best channel for longitudinal protection of EHV and UHV transmission lines due to its advantages such as long transmission distance, strong anti-interference ability, large transmission capacity and high safety and reliability. choose. For the dual main protection applied to 220kV and above lines, the two sets of protection are respectively connected to relatively independent channels one by one to ensure the independence of the dual protection. In this way, since each set of protection has only one channel, once the channel fails, the main protection needs to be taken out of operation. When the multiplexed channel passes through many sites and the distance is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 詹荣荣周春霞周泽昕李岩军刘宇詹智华余越贾琰崔佳丁慧霞陈争光董明会
Owner STATE GRID CORP OF CHINA
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