An intelligent operation box with inrush current suppression function

Abstract

The invention discloses an intelligent operation box with an inrush current suppression function, which comprises a main board, an AC quantity collection module, an input module, an output module anda voltage switching module. A main board comprise a management CPU and a first FPGA, wherein that first FPGA and each module are connected and communicate through a BLVDS bus. The management and control CPU acquires the AC quantity data collected by the AC quantity collection module and the input quantity data collected by the input module through the first FPGA. Then, according to the acquired data, the switching bus PT operation instruction is transmitted to the voltage switching module to switch on and off the corresponding bus PT, and when the inrush current inhibition criterion is operated, the switching operation instruction is transmitted to the opening/closing module to control the corresponding circuit breaker to complete the switching operation by using the preset inrush currentinhibition algorithm. The invention can improve the accuracy of the opening and closing angle control of the circuit breaker, effectively suppress the excitation inrush current generated when the transformer is airdropped, realize the intelligence of the operation box, and have the operation and communication ability.

Description

technical field [0001] The invention relates to the technical field of electric power system safety automatic control, in particular to an intelligent operation box with the function of suppressing inrush current. Background technique [0002] As an important auxiliary device of the power system, the operation box is suitable for auxiliary operation of circuit breakers with single-trip and double-trip coils, split-phase and three-phase operations. It can monitor its operating status and switch the output AC voltage of the voltage transformer. And realize the connection and cooperation between the protection device and the circuit breaker. The traditional operation box is composed of a tripping operation circuit, a closing operation circuit, a voltage switching circuit, and a pressure locking circuit. The trip / closing operation circuit is started by receiving a remote opening and closing command, and the circuit breaker is randomly opened and closed. [0003] The traditional...

AI Technical Summary

Problems solved by technology

[0004] (1) It is impossible to control the opening and closing angle of the circuit breaker, and it does not have the ability to suppress the inrush current;

[0005] (2) The operation box is composed of relays, power resistors and other components, and does not have computing and communication capabilities

[0006] (3) The position and quantity of the operation box modules are relatively fixed and cannot be expanded at will

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