Actual breaking grounding condition test loop and fault simulation platform for distribution network and test method thereof

Abstract

The invention discloses an actual breaking grounding condition test loop and fault simulation platform for a distribution network and a test method thereof. The simulation platform comprises a single-phase actual breaking condition analog loop, a diversified control system and information acquisition system, a grounding medium analog loop and a grounding medium switching platform. The single-phaseactual breaking condition analog loop includes an overhead line breaking body, a breaking loop support element, and a breaking mechanical switch. The diversified control system and information acquisition system being a secondary acquisition and control loop includes a measurement unit, a fault high-precision recording device, a fast camera device, and a switch control and data display platform.According to the invention, for the novel in-service device and technology for single-phase breaking grounding fault, verification of function effects like fault determination, arc suppression and compensation of different technologies is realized.

Description

technical field [0001] The invention belongs to a distribution network test device, in particular to a movable distribution network disconnection and grounding live test circuit, a fault simulation platform and a test method. Background technique [0002] With the increasing attention to the application of distribution network construction, the research on single-phase fault processing technology of distribution network is also getting more and more in-depth. In recent years, there have been technologies such as single-phase ground fault research and judgment on the neutral point grounded by new power electronic equipment, and single-phase ground fault research and judgment using intelligent switches and intelligent current amplification auxiliary devices in the distribution network. Therefore, new requirements are put forward for the inspection of new equipment and new technologies for single-phase ground faults in distribution networks, and single-phase grounding simulatio...

AI Technical Summary

Problems solved by technology

The main disadvantages of this scheme: (1) The disconnection grounding test is limited by the type of medium on site

On-site simulation is limited by the type of site, and it is generally impossible to conduct tests under various working conditions

(2) There are certain security risks

The site uses the actual site as a disconnection simulation test, which has a high safety risk, and pedestrians and vehicles around the grounding point have potential safety hazards of step voltage

(3) Data acquisition power supply is limited

The main disadvantage of this scheme: it cannot simulate single-phase disconnection conditions

At present, single-phase grounding simulation devices are generally only equipped with three methods: direct grounding (that is, metallic grounding), grounding through different transition resistances, and arcing grounding, which cannot truly simulate line disconnection conditions.

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