Method for checking and testing relay protection vector before operation of newly-built transformer station

Abstract

The invention relates to a method for checking and testing the relay protection vector before the operation of a newly-built transformer station. The method comprises the following steps of: (1) setting running states of primary equipment and secondary equipment to be tested; (2) accessing a test reactor to a non-bus side of a current transformer of a branch to be tested, or shorting out or accessing the test reactor to a bus side of a current transformer at the other end of an electric transmission line, and accessing a test transformer to a non-bus side of a current transformer of an access branch of test equipment; (3) accessing the test transformer to a 380V three-phase alternating current, and adjusting a voltage and a current which are output by the test transformer; (4) judging the accuracy of each relay protection secondary equipment vector according to a conventional vector judgment criteria; and (5) changing the access branch of the branch to be tested or the test equipment, and checking the relay protection vector of other branches of the voltage class, wherein the other branches comprise an electric transmission line and branches which are connected with a transformer to be tested. The method disclosed by the invention has the advantage of capability of effectively solving the problem of unnecessary incorrect movement or failed operation and the like caused by incorrect secondary equipment vectors, so that the primary equipment can be put into normal operation as soon as possible.

Description

technical field [0001] The invention relates to a test method for inspecting relay protection vectors before a newly-built substation is put into operation, and is particularly suitable for the test inspection of relay protection vectors without load before a newly-built substation is put into operation in a power system, and belongs to the technical field of power system detection . Background technique [0002] The equipment that directly produces, transmits and distributes electric energy in the power system is called primary equipment, such as generators, transmission lines, transformers, etc.; the equipment that monitors, measures, controls and protects primary equipment is called secondary equipment, such as protective relays, measurement instrumentation etc. Before the power equipment is installed and put into operation, the primary and secondary equipment must be in a normal state; for the secondary equipment, while the equipment is in a normal state, it is also ne...

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Problems solved by technology

[0005] Prior to this, it is generally checked by checking the wires of the current / voltage secondary circuit, the polarity of the current transformer point, the flow / voltage of the current / voltage secondary circuit, and the load current vector inspection after the primary equipment is charged. The amount is large and time-consuming, and even so, the vector is still uncertain before the substation is put into operation. If the vector is wrong, it will directly lead to problems such as relay protection malfunction or refusal, inaccurate measurement data, and measurement errors, which will directly affect power equipment. normal operation of

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