Comprehensive inspecting and testing method for high voltage power transformer and distribution substation

Abstract

The invention provides a comprehensive inspecting and testing method for a high voltage power transformer and distribution substation; through using the boosting principle of a transformer, a 380V construction power supply is applied to the low-voltage side of secondary winding of the transformer by a designed power transmission control protection device, and thereby stimulated high voltage electricity is obtained at the high voltage side of the transformer. The stimulated high voltage electricity is transmitted from a transformer feeder cabinet to a transformer substation bus system for stimulating power transmission. After the high voltage bus system is simulatively electrified, the stimulated high voltage electricity is further transmitted a voltage transformer PT cabinet to perform stimulated power transmission, for inspecting operational parameters of the PT cabinet and inspecting whether voltage values of an open winding, a triangular winding and high voltage cabinet microcomputer intelligent protectors meet requirements. The simulated voltage is transmitted to the voltage transformer PT across two sections of buses for simulating power transmission, thus being capable of inspecting protection functions of the PT microcomputer intelligent comprehensive protection device, and performing PT automatic switching tests. Through simulating inverse power transmission, changing the gear switch of the transformer, and recording current values in loops of low voltage side and reading of voltmeter of the high voltage side of the transformer, no-load current characteristic curves of the transformer at different gears can be drawn up.

Description

technical field [0001] The invention relates to a comprehensive inspection and test method for a high-voltage transformer and distribution station, in particular to a comprehensive inspection and test method for reverse power transmission in a high-voltage system, and belongs to the technical field of high-voltage system detection. Background technique [0002] Routine tests are required for newly built high-voltage substations. At present, the existing conventional test methods mainly refer to the "Electrical Installation Engineering Electrical Equipment Handover Test Standard" GB50150-2006 to carry out various testing tests: including circuit breaker test, transformer test, isolating switch test, transformer test, cable test , busbar withstand voltage test, etc. These test items are single tests, which cannot completely and truly reflect the operation status of the high-voltage cabinet after normal power supply, cannot detect equipment defects in advance after the high-vo...

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Problems solved by technology

These test items are single tests, which cannot completely and truly reflect the operation status of the high-voltage cabinet after normal power supply, cannot detect equipment defects in advance after the

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