A substation S-type primary flow system and method

Abstract

The invention belongs to the technical field of power debugging and power tests, and particularly relates to a power substation S-shaped primary through-flow system and method. In primary through flow, the method comprises the steps of connecting the head portion of an S shape of a primary loop of a power substation to the output end of a through flow instrument, connecting the tail portion of the S shape to an earth screen to be connected with the input end of the through flow instrument, measuring and recording actual current of all interval CT secondary sides in two situations that the through flow instrument outputs half rated current and rated current, and checking correctness of the primary loop and a secondary loop of a design drawing, thus guaranteeing correctness of CT ratio and polarity configuration and guaranteeing that a CT secondary loop has no open circuit phenomenon. The S-shaped through-flow method disclosed by the invention has the advantages of enabling a through-flow test to be finished in one time, avoiding segmented through flow and frequent disconnector operation, further saving through-flow test time, achieving high test efficiency, high test accuracy, high practicability, convenience in use, and capability of quickly and accurately recognizing defects of a CT mutual inductor, and being suitable for the field of through-flow tests of small, medium and large power substations.

Description

Technical field: [0001] The invention belongs to the technical field of power debugging and power testing, and in particular relates to an S-type primary flow system and method for a substation. Background technique: [0002] At present, my country's economy is developing rapidly and people's quality of life is improving day by day. Electricity has become the cornerstone of energy in today's society due to its advantages such as environmental protection, high conversion and transmission efficiency, easy management, and scheduling control. At the beginning of the 13th Five-Year Plan, my country's infrastructure is still expanding and improving, the demand for electric energy is increasing day by day, the scale of the power system is expanding, and the number of substations under construction is increasing. Basically, during the construction and commissioning of substations, it is necessary to ensure that all CT current transformers have no wiring errors and no open circuits, a...

AI Technical Summary

Problems solved by technology

In the existing one-time flow test, the primary circuit of the substation is usually passed through in sections. When completing each section of flow, it is necessary to frequently operate the circuit breaker, isolation switch and grounding switch. The flow test takes a long time and the test efficiency is low. and unreliable issues

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