Power distribution line high-frequency transient characteristic signal generating device and control method thereof

Abstract

The invention provides a power distribution line high-frequency transient characteristic signal generation device and a control method thereof, and the method comprises the steps: a multifunctional mutual inductor collection verification measurement and control communication device converts a received fault characteristic signal file into a current fault simulation signal and a voltage fault simulation signal; a gear control instruction is sent to the program control load box assembly according to the load requirement of a built-in mutual inductor of the tested equipment; an integrated high-voltage voltage and current generation assembly generates a current primary signal and a voltage primary signal according to the current fault simulation signal and the voltage fault simulation signal; and a program-controlled load box assembly adjusts the working gear of the program-controlled load box assembly according to the gear control instruction, so that the program-controlled load box assembly provides an external load for the secondary output of the tested equipment. The high-frequency transient characteristic signal output by the scheme can meet the requirement of power distribution automation equipment for carrying out a small-current grounding fault identification function test.

Description

technical field [0001] The invention relates to the field of distribution line equipment testing, in particular to a distribution line high-frequency transient characteristic signal generating device and a control method thereof. Background technique [0002] The primary and secondary fusion power distribution equipment is characterized by "miniaturization, integration, maintenance-free, and high reliability". It introduces state perception and fault self-diagnosis technology, which can identify small current grounding faults of 10kV distribution lines and realize local isolation Or remove the fault. Since the launch of the "Special Work on Primary and Secondary Fusion Technology for Power Distribution Equipment" and the release of the technical specifications for the bidding of primary and secondary fusion equipment series materials, this type of equipment has quickly been put into operation on a large scale across the country. At present, the basic requirements have been c...

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Problems solved by technology

[0003] The ground fault identification function test of the primary and secondary fusion power distribution equipment is one of the core test items with the highest requirements for the detection technology level and test conditions in the equipment test and test items. Under the rated voltage and rated load current, when different system grounding methods, grounding resistance, fault types and fault angles are superimposed and output, the transient characteristic signals of small current grounding faults occur, and the existing test devices in the market are based on the integrated high voltage test Power supply, the output high-voltage and high-frequency transient waveform signal is easy to be distorted, and the synchronization output of zero-sequence voltage and zero-sequence current is poor

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