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Long-cable withstand voltage test equipment parameter optimization method

A technology of withstand voltage test and equipment parameters, applied in the direction of measuring electricity, measuring electrical variables, testing dielectric strength, etc., can solve the problem of difficulty in realizing the reactor combination scheme, and achieve the effect of improving test efficiency and economy, and comprehensive understanding.

Active Publication Date: 2018-08-24
HOHAI UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to improve the efficiency of scheme selection, propose a method for optimizing the parameters of long cable withstand voltage test equipment, realize the best test effect with both test cost and quality factor, and solve the technical problem that the optimal reactor combination scheme is difficult to realize

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Embodiment Construction

[0034] The technical solutions of the present invention will be further elaborated below according to the drawings and in conjunction with the embodiments.

[0035] The test product is a 220kV XLPE submarine cable with a length of 30km and an equivalent capacitance of 5.94μF. Rated voltage of resonant reactor: 250kV, inductance value 26H, internal resistance value 20Ω, rated current 50A, the maximum number of reactors used shall not exceed 10; the rated capacity of each excitation transformer is 150kVA, the input voltage is 500V / 550V, and the highest voltage on the high-voltage side is 3.41 kV, the maximum passing current is 44A; the operating frequency is 30-300Hz, and a total of three excitation transformers are put into use.

[0036] figure 1 It is a wiring schematic diagram of the present invention, figure 2 It is a parameter optimization flow chart of the present invention, a method for parameter optimization of long cable withstand voltage test equipment, and the spec...

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Abstract

The invention discloses a long-cable withstand voltage test equipment parameter optimization method, which comprises the following steps: to begin with, obtaining a calculating formula of resonance frequency and quality factor through a parallel compensation series resonance wiring mode; establishing a mathematical optimization model with minimum combination quantity of reactors being an objectivefunction and with the quantity of series reactors and the quantity of parallel compensation reactors being variables, constraint conditions comprising resonant frequency and test voltage and the like; and selecting a minimum-reactor combination mode in a quality factor interval meeting the constraint conditions as an optimum reactor combination wiring scheme, and meanwhile, obtaining a corresponding quality factor, resonant frequency, reactor current, transformer high-voltage side current and transformer high-voltage side output voltage. The method realizes an optimum test effect consideringboth test cost and quality factor, provides a new equipment parameter optimization method for long-cable withstand voltage test and improves scheme selection efficiency.

Description

technical field [0001] The invention belongs to the field of transmission line testing, and in particular relates to a method for optimizing parameters of long cable withstand voltage test equipment. Background technique [0002] With the acceleration of the pace of modernization, the demand for urban power supply continues to increase, and high-voltage long-distance cable lines are an inevitable trend in future development. At present, there is still a lack of research on the key technologies of long-distance cable transfer tests in my country. The withstand voltage test is a key part of the cable transfer test. When designing these long-distance cable withstand voltage test programs, many problems will be encountered, such as equipment voltage, current, Frequency and other constraints. Therefore, it is very meaningful to study and discuss the long-distance cable withstand voltage test scheme and specific test methods. [0003] At present, there are two schemes for the wit...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1272
Inventor 潘文霞孙凯朱正鼎谢晨
Owner HOHAI UNIV
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