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

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...

AI Technical Summary

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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