High-voltage DC support insulator test device, test system and test method

Abstract

A high-voltage DC support insulator test apparatus, test system and test method. The high-voltage DC support insulator test apparatus comprises an enclosed test container (12), wherein the test container (12) is provided with a group of test seats (20) used for mounting a tested DC support insulator (101) and a common power supply apparatus (18) used for providing a test voltage to the tested DC support insulator (101). The test apparatus further comprises disconnection apparatuses (21, 27, 28, 29) corresponding to the test seats (20) and used for disconnecting the common power supply apparatus (18) and the corresponding tested DC support insulator (101) under set conditions. The characteristics of the DC support insulator (101) can be learnt more accurately by testing a group of DC support insulators (101) under the same conditions, thereby improving the accuracy of a test result of the DC support insulators (101).

Description

technical field The invention relates to the field of testing high-voltage direct current support insulators, in particular to a test device, test system and test method for high-voltage direct current support insulators. Background technique Compared with AC transmission, HVDC has the advantages of strong transmission capacity, low line loss, no need for synchronous operation of AC on both sides, and small failure loss in long-distance transmission. It is the focus of future transmission line construction. However, the electric field has unidirectional stability under DC conditions, and the charge accumulation effect occurs in the insulating material, making its insulation and flashover characteristics very different from those under AC conditions, and the resulting breakdown or discharge consequences are more serious than those under AC conditions. Seriously, it will directly affect the reliability of DC transmission system. This effect is more significant for inner insul...

AI Technical Summary

Problems solved by technology

However, the current research on the flashover characteristics of DC support insulators is still on the experimental research of individual DC support insulators

The test conditions of each test are different, which will bring deviation to the test results to a certain extent, and the characteristics of the DC support insulator cannot be accurately grasped through the test

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