Method for carrying out long-distance submarine cable pressure test by using reactive compensation reactor

A technology for compensating reactors and withstand voltage tests, which is applied in the direction of testing circuits, testing dielectric strength, etc., can solve the problems of high test difficulty and achieve the effect of low test difficulty and low test cost

Active Publication Date: 2020-09-01
XIAN THERMAL POWER RES INST CO LTD
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Problems solved by technology

However, with the increase of the length of the submarine cable, more shunt reactors and series reactors need to be configured according to the parameters of the submarine cable, and the difficulty of the test is still relatively large.

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  • Method for carrying out long-distance submarine cable pressure test by using reactive compensation reactor

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Embodiment Construction

[0020] The present invention is described in further detail below in conjunction with accompanying drawing:

[0021] refer to figure 1 The method for carrying out the long-distance submarine cable withstand voltage test using a reactive power compensation reactor according to the present invention comprises the following steps:

[0022] 1) Calculate the capacitance L of the submarine cable to the ground according to the length of the submarine cable and the equivalent capacitance of the submarine cable to the ground per kilometer 2 ;

[0023] 2) Calculate the parallel compensation inductance value L according to the reactance values ​​of the reactive power compensation reactor 9 of the land station and the reactive power compensation reactor 12 of the sea station 2 ;

[0024] 3) Set the rated frequency f of the reactive power compensation reactor 9 of the land station and the reactive power compensation reactor 12 of the sea station, and calculate the inductance value of th...

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Abstract

The invention discloses a method for carrying out a long-distance submarine cable pressure test by using a reactive power compensation reactor. The method comprises the following steps: calculating aparallel compensation inductance value L2 according to reactance values of a land station reactive power compensation reactor and a sea station reactive power compensation reactor; calculating an inductance value L1 of a test series adjustable reactor according to a series-parallel resonance calculation formula when series-parallel resonance is reached; adjusting the inductance value of the test series adjustable reactor according to the calculated inductance value of the test series adjustable reactor 4; setting the frequency of a variable frequency power supply, carrying out slow boost testing, when the reading of the test capacitive voltage divider reaches a test voltage, stopping boosting, keeping the station for preset time, disconnecting the variable frequency power supply to carry out discharging at the end of time so as to complete long-distance submarine cable pressure testing by a reactive compensation reactor. With the method, the alternating-current pressure test can be carried out on the submarine cable, the capacity and the number of field test equipment are relatively small, and the test difficulty and the test cost are relatively low.

Description

technical field [0001] The invention belongs to the field of high-voltage testing of electric equipment, and relates to a method for carrying out a long-distance submarine cable withstand voltage test by using a reactive power compensation reactor. Background technique [0002] my country's offshore wind power is becoming a new driving force for the development of global offshore wind power, and the supporting role of offshore wind power in my country's energy transformation will become more and more significant. Submarine cables are an indispensable part of offshore wind power construction. At present, offshore wind power is developing from shallow seas to deep seas, which means that the length of submarine cables will become longer and longer. The withstand voltage test is a key part of the cable handover test. Research It becomes very meaningful to discuss these long-distance cable withstand voltage test schemes and specific test methods. [0003] At present, the submari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01R31/14
CPCG01R31/12G01R31/14
Inventor 王团结刘溟江张静张少鹏何信林杨世强张鹏
Owner XIAN THERMAL POWER RES INST CO LTD
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