An intelligent operation box with inrush current suppression function

An intelligent operation box and inrush current suppression technology, which is applied in the direction of overcurrent protection, electrical components, information technology support systems, etc., can solve the problem of fixed position and quantity of operation box modules, lack of ability to suppress excitation inrush current, and uncontrollable Circuit breaker opening and closing angle and other issues, to reduce intermediate links, improve accurate control, and suppress the effect of excitation inrush current

CN109193951AInactive Publication Date: 2019-01-11NANJING GUODIAN NANZI WEIMEIDE AUTOMATION CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-01-11
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Examples

Embodiment

[0060] This embodiment uses multi-CPU technology and large-scale FPGA technology to realize the intelligent transformation design of the traditional operation box; uses the main board to control the CPU to implement the inrush current suppression algorithm to complete the integrated design of the intelligent operation box with the inrush current suppression function.

[0061] Such as figure 1 As shown, the intelligent operation box with inrush suppression function includes a main board, an intelligent AC module for collecting AC voltage / current, an intelligent DI module (that is, an input module) for collecting opening and closing commands and circuit breaker position information, and a control circuit breaking module. The tripping / closing module (that is, the output module) of the device opening and closing and the voltage switching module of the switching bus PT.

[0062] combine figure 1 and figure 2 , dual CPUs and FPGAs are designed on the motherboard, the dual CPUs ar...