A Control Method for Parallel Voltage Regulation of Transformer On-Load Switches

Abstract

The invention relates to a parallel-connection voltage-regulating control method for on-load switches of transformers and belongs to the technical field of transformers. According to the technical scheme, the N on-load voltage-regulating transformers are connected in parallel for operation, parallel-connection voltage-regulating control is performed on the on-load switches of the transformers, and by the aid of parallel-connection voltage-regulating interconnected control loops and parallel-connection voltage-regulating local and remote operation control loops of the on-load switches, the reliable parallel-connection voltage-regulating control is achieved. By the aid of the control method, active control or slaved control of any device can be achieved, and the method has the advantages of being easy to expand. By the aid of the parallel-connection voltage-regulating interconnected control loops, the method is used for mechanical interconnected control, the gear consistency judgment during voltage regulation of the on-load switches of the transformers is achieved, the reliability of voltage regulation is guaranteed, and active control or slaved control of all control devices can be achieved; and by the aid of the parallel-connection voltage-regulating local and remote operation control loops, the requirements for local or remote parallel-connection voltage-regulating control of the on-load switches are met. The method has the advantages of being safe, high in reliability and flexible to control.

Description

technical field [0001] The invention relates to a transformer on-load switch parallel voltage regulation control method, which belongs to the technical field of transformers. Background technique [0002] The power supply system sometimes puts two or more transformers in parallel and puts them into operation for some purpose. With the continuous increase in the number of on-load tap-changing transformers used, more and more users propose to carry out parallel operation of on-load tap-changing transformers. However, the parallel operation of on-load tap changer transformers should meet the requirement that the rated voltage and voltage ratio of the primary side and secondary side of the transformer are equal. Therefore, when controlling the voltage regulation of parallel transformers, it is necessary to ensure that the on-load tap-changer operates at the same time, so that each switch The tap position of the transformer is in a synchronous state, otherwise it will cause the ...

AI Technical Summary

Problems solved by technology

However, the parallel operation of on-load tap changer transformers should meet the requirement that the rated voltage and voltage ratio of the primary side and secondary side of the transformer are equal. Therefore, when controlling the voltage regulation of parallel transformers, it is necessary to ensure that the on-load tap-changer operates at the same time, so that each switch The tap position of the transformer is in a synchronous state, otherwise it will cause the failure of parallel operation of the transformer and affect the safe operation of the transformer

At present, the control method of the background technology mostly adopts logic control of a large number of relays or a dedicated parallel controller. The first method uses a large number of relays for control, which has complex control loops, inconvenient expansion, easy contact failure, and high failure rate. The disadvantages; the second method adopts parallel controller control, which has the disadvantages of high price and complicated control program

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