Multi-tap fixed adjustable reactor for 1000kv UHV cvt calibration and its realization method

Abstract

The invention discloses a multi-tap fixed adjustable reactor for checking a 1,000kV extra-high voltage CVT. The multi-tap fixed adjustable reactor is characterized by comprising a main resonance reactor L1, a main resonance reactor L2 and a fine-tune resonance reactor L3, wherein the main resonance reactor L1, the main resonance reactor L2 and the fine-tune resonance reactor L3 are sequentially connected with one another in series; the main resonance reactor L2 and the fine-tune resonance reactor L3 are connected into a whole; the main resonance reactor L2 is arranged at the upper part of the fine-tune resonance reactor L3; the main resonance reactor L1, the main resonance reactor L2 and the fine-tune resonance reactor L3 comprise a plurality of miniature reactors, which are connected with one another in series and of which the inductance values are fixed and equal; a closed magnetic circuit structure with an air gap is arranged in each miniature reactor; and the miniature reactors are fixedly placed up and down in a form of building blocks. The invention further provides an implementation method of the multi-tap fixed adjustable reactor for checking the 1,000kV extra-high voltage CVT.

Description

technical field [0001] The invention relates to a multi-tap fixed adjustable reactor for 1000kV ultra-high voltage CVT calibration and a realization method, belonging to the technical field of ultra-high voltage voltage transformer testing. Background technique [0002] 1000kV UHV capacitor voltage transformer (CVT) is an indispensable item in the main equipment of UHV substation. It undertakes the important role of power metering and power detection in the UHV AC system, and providing signals for the relay protection of the power system. Its accuracy directly affects the fairness and justice of the trade settlement of power generation and power supply enterprises. The country compulsorily requires its on-site error verification in accordance with the JJG1021-2007 "Power Transformer" verification regulations. [0003] The error calibration power supply of the voltage transformer generally adopts a test transformer power supply or a power frequency series resonant power supp...

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Problems solved by technology

After the resonant reactor arrives at the test site, it needs to be hoisted, installed, and assembled, which is very cumbersome, and the reactor has a large vibration force and high noise. After the reactor is stacked at a certain height, there will be safety hazards, heavy workload and poor mobility. The displacement is very troublesome, the wiring is complicated, the reliability is low, and the work efficiency is low

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