GIS equipment low-voltage conductor surface electric field intensity measurement device and method

Abstract

The invention discloses a GIS equipment low-voltage conductor surface electric field intensity measurement method which belongs to the technical field of conductor surface electric field measurement. The structure of an electric field intensity measurement device is that a GIS equipment housing is fixed on a pedestal through a short support, a high-voltage conductor is supported in the center of the GIS equipment housing through a long support on the pedestal, and a wedge block is cut in the middle of the housing and is supported in situ with insulating material; the wedge block is connected with a resistor of 10 kilo ohms, the resistor is connected to the ground, and two ends of the resistor are connected with an amplifier circuit; the amplifier circuit is connected with a display; electric field intensity measurement is that high-voltage electricity of alternating current 220kV is applied to the high-voltage conductor, voltage signals of the two ends of the resistor are input to the amplifier circuit through a cable, and the reading of the electric field intensity is displayed on the display. Through electric field calculation and analysis of internal defects of GIS equipment, and through verification by a test, the GIS equipment low-voltage conductor surface electric field intensity measurement structure is of great significance to improving the internal insulating strength of the GIS and researching a relation between the internal defects and electric field intensity of the GIS equipment.

Description

technical field [0001] The invention belongs to the technical field of conductor surface electric field measurement, in particular to a method for measuring the electric field intensity of a low-voltage conductor surface of GIS equipment. Specifically, it is to study the relationship between the development of partial discharge of typical defects inside GIS equipment and the electric field intensity. Background technique [0002] Gas Insulated Switchgear (GIS, Gas Insulated Switchgear) has the characteristics of small size, integration and convenient installation, and is widely used in substations in power systems. With the continuous increase of grid voltage level and system capacity, internal faults of GIS equipment also occur frequently. Therefore, this device is of great significance for the research of partial discharge caused by internal defects of GIS. Partial discharge is not only the harbinger and manifestation of equipment insulation deterioration, but also the c...

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Problems solved by technology

[0003] With the development of power grid construction, due to the limitations of site conditions, geological conditions and environmental conditions in substation construction, more and more GIS equipment are used, and more and more GIS equipment are currently operating in the power grid system. , and arguably even most of SF 6, For gas insulated equipment, its insulation defect is the main cause of equipment failure

Due to the long-term operation of GIS equipment in a high-voltage environment and the actions of various high-voltage electrical operating mechanisms, it will cause internal defects in GIS equipment, thereby destroying the insulation performance of GIS equipment.

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