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Verification system and verification method for submarine power cable overvoltage and protection test thereof

A submarine power cable and protection test technology, applied in the direction of testing the dielectric strength, etc., can solve the problems of complex structure types, simplified simulation models, and no corresponding verification system for simulation results, achieving significant verification effects, wide verification range, and simple wiring Effect

Pending Publication Date: 2017-05-31
ZHEJIANG ZHOUSHAN OCEAN POWER TRANSMISSION RES INST CO LTD +4
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Existing cable overvoltage analysis and tests are based on product quality inspection and testing, and rarely involve the influence in the power system
At the same time, there is no simulation and test verification data for various types of overvoltages on submarine power cables.
In actual operation, there are many types of submarine power cables, complex structure types, simplified simulation models, and no corresponding verification system for simulation results; existing submarine power cable overvoltage tests are only for product testing, pre-qualification and handover tests, and are completely in accordance with the test Standards and regulations, there is no research and test verification system for submarine power cable overvoltage and its protection characteristics in power systems

Method used

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  • Verification system and verification method for submarine power cable overvoltage and protection test thereof

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Embodiment Construction

[0019] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0020] Such as figure 1 As shown, the present invention includes a water terminal 2 for connecting a submarine power cable 1, an impulse voltage test device 3 directly connected to the water terminal 2 for generating an impulse voltage, a measurement system connected to the water terminal 2, and a water terminal 2 for connecting to the water terminal 2. The arrester 4 connected to the terminal 2; the measurement system includes a voltage divider 5; during the test, the conductors at both ends of the submarine power cable 1 sample are processed and connected to the water terminal 2, and the lead cladding and armoring at both ends are all grounded; The voltage test device 3 is connected to the conductor of the submarine power cable 1 and the voltage divider 5; the impulse voltage test device 3 produces various overvoltage waveforms; th...

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Abstract

The invention provides a verification system and verification method for submarine power cable overvoltage and protection test thereof, and relates to the verification system and verification method. The existing submarine power cable overvoltage test is only for product detection, pre-identification and transfer test, and is in full accordance with test standards and procedures. Research and test verification systems for submarine power cable overvoltage and protection characteristics thereof in a power system are unavailable. The verification system provided by the invention comprises a water terminal which is connected with a submarine power cable, an impulse voltage test device which is directly connected with the water terminal and is used for generating impulse voltage, a measuring system which is connected with the water terminal, and an arrester which is for connected with the water terminal. The measuring system comprises a voltage divider. According to the technical scheme, the wiring is simple; less equipment materials are required; and the test verification effect is significant.

Description

technical field [0001] The invention relates to the field of submarine power cable overvoltage and its protection, in particular to a verification system for submarine power cable overvoltage and its protection test. Background technique [0002] Submarine cables are important transmission channels for island power grids and offshore wind farms. The distance of the submarine cable is longer than that of the land cable, resulting in the equivalent capacitance of the submarine cable being greater than that of the land cable, and the overvoltage during the transient process after the fault may be greater. High-voltage, large-section, and long-distance submarine cables are very different from traditional overhead lines in terms of operation and maintenance, especially in terms of overvoltage. Once a submarine high-voltage cable fails and stops, it will cause huge economic losses. , for this reason, it is very necessary to conduct overvoltage research on it. [0003] At present...

Claims

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/12
Inventor 宣耀伟俞恩科张磊迟永宁陈国志乐彦杰郑新龙高震李琰沈耀军
Owner ZHEJIANG ZHOUSHAN OCEAN POWER TRANSMISSION RES INST CO LTD
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