CN103078291B - Intelligent residual current leakage sudden-change protection method - Google Patents

Intelligent residual current leakage sudden-change protection method Download PDF

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Publication number
CN103078291B
CN103078291B CN201210579224.3A CN201210579224A CN103078291B CN 103078291 B CN103078291 B CN 103078291B CN 201210579224 A CN201210579224 A CN 201210579224A CN 103078291 B CN103078291 B CN 103078291B
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Prior art keywords
residual current
delta
circuit
sudden
microprocessor
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CN103078291A (en
Inventor
杜建中
姚相东
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JIANGSU FEAL ELECTRICAL APPLIANCES CO Ltd
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JIANGSU FEAL ELECTRICAL APPLIANCES CO Ltd
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Abstract

The invention discloses an intelligent residual current leakage sudden-change protection method. The method comprises the following steps of collecting residual current I (delta x) of n lines by a current transformer within a time t, and outputting the collected residual current I (delta x) of the n lines to a microprocessor to obtain sudden-change residual current I (delta t); when the collected residual current is greater than 0.9I (delta t) during real-time line monitoring, enabling the microprocessor to drive a circuit breaker to act respectively by a tripping driving circuit and a magnetic flux converter; and when the collected residual current is smaller than 0.5I (delta t) during real-time line monitoring, enabling the circuit breaker not to act. The method has the advantage that when the actual residual current value in the line suddenly changes, the residual current circuit breaker timely acts to protect equipment or persons.

Description

A kind of intelligent residual current leakage sudden-change protection method
Technical field
The present invention relates to a kind of intelligent residual current leakage sudden-change protection method.
Background technology
Season and weather weather reason of changes cause circuit residual current sudden change value not reach residual current gear settings, but reach the gear value of mutation current setting, make the timely disjunction proterctive equipment of residual current circuit breaker or personal safety.
Existing residual current circuit breaker is fixing residual current gear, reaches gear value, residual current circuit breaker action in circuit.
If residual current circuit breaker residual current gear arranges too high, occur not reaching the sudden change residual current arranging gear operating value in circuit, residual current circuit breaker is failure to actuate, can not proterctive equipment or people in time.
Summary of the invention
The defect that the present invention seeks to exist for prior art provides a kind of intelligent residual current leakage sudden-change protection method.
The present invention for achieving the above object, adopts following technical scheme:
A kind of intelligent residual current leakage sudden-change protection method of the present invention is as follows:
In time t, adopt current transformer to gather n circuit residual current I Δ r, by n the circuit residual current I gathered Δ rexport microprocessor to and obtain sudden change residual current I Δ t; The residual current collected when Real-Time Monitoring circuit is greater than 0.9I Δ t, then microprocessor drives circuit breaker work through dropout drive circuit, magnetic flow convertor successively; The residual current collected when Real-Time Monitoring circuit is less than 0.5I Δ t, be then failure to actuate.
Sudden change residual current I Δ tacquisition methods as follows:
I Δt = I Δi - ( Σ x = 1 n I Δx ) n ;
Wherein I Δ ifor real-time residual current.
By n the circuit residual current I that current transformer gathers Δ rmicroprocessor is exported to after filtering and amplifying circuit amplification filtering.
In circuit of the present invention, real surplus current value is undergone mutation, the timely action of residual current circuit breaker, proterctive equipment or people.
Accompanying drawing explanation
Fig. 1: hardware configuration schematic diagram of the present invention.
Embodiment
As shown in Figure 1, a kind of intelligent residual current leakage sudden-change protection method of the present invention is as follows:
In time t, adopt current transformer to gather n circuit residual current I Δ r, by n the circuit residual current I gathered Δ rexport microprocessor to and obtain sudden change residual current I Δ t; The residual current collected when Real-Time Monitoring circuit is greater than 0.9I Δ t, then microprocessor drives circuit breaker work through dropout drive circuit, magnetic flow convertor successively; The residual current collected when Real-Time Monitoring circuit is less than 0.5I Δ t, be then failure to actuate.
Sudden change residual current I Δ tacquisition methods as follows:
I Δt = I Δi - ( Σ x = 1 n I Δx ) n ;
Wherein I Δ ifor real-time residual current.
By n the circuit residual current I that current transformer gathers Δ rmicroprocessor is exported to after filtering and amplifying circuit amplification filtering.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (2)

1. an intelligent residual current leakage sudden-change protection method, is characterized in that described method is as follows:
In time t, adopt current transformer to gather n circuit residual current I Δ x, by n the circuit residual current I gathered Δ xexport microprocessor to and obtain sudden change residual current I Δ t; The residual current collected when Real-Time Monitoring circuit is greater than 0.9I Δ t, then microprocessor drives circuit breaker work through dropout drive circuit, magnetic flow convertor successively; The residual current collected when Real-Time Monitoring circuit is less than 0.5I Δ t, be then failure to actuate;
Sudden change residual current I Δ tacquisition methods as follows:
I Δt = I Δi - ( Σ x = 1 n I Δx ) n ;
Wherein I Δ ifor real-time residual current.
2. a kind of intelligent residual current leakage sudden-change protection method according to claim 1, is characterized in that n the circuit residual current I gathered by current transformer Δ xmicroprocessor is exported to after filtering and amplifying circuit amplification filtering.
CN201210579224.3A 2012-12-27 2012-12-27 Intelligent residual current leakage sudden-change protection method Active CN103078291B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210579224.3A CN103078291B (en) 2012-12-27 2012-12-27 Intelligent residual current leakage sudden-change protection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210579224.3A CN103078291B (en) 2012-12-27 2012-12-27 Intelligent residual current leakage sudden-change protection method

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CN103078291A CN103078291A (en) 2013-05-01
CN103078291B true CN103078291B (en) 2015-07-01

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103326330B (en) * 2013-07-04 2015-08-12 文杰 Based on the differential protection of Sudden Changing Rate impedance principle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0084814B1 (en) * 1982-01-26 1985-04-17 Siemens Aktiengesellschaft Earth leakage circuit breaker sensitive to fault currents with d.c. components
CN1604419A (en) * 2004-11-04 2005-04-06 河北工业大学 Dead-space free circuit breaker for earth leakage abrupt change and operation method thereof
CN102170107A (en) * 2011-05-05 2011-08-31 浙江德菱科技有限公司 Integral intelligent moulded case circuit breaker with residual current protection action
CN201966574U (en) * 2011-03-30 2011-09-07 苏州工业园区非而智能电器有限公司 Intelligent electric leakage controller with three-section protection function

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0084814B1 (en) * 1982-01-26 1985-04-17 Siemens Aktiengesellschaft Earth leakage circuit breaker sensitive to fault currents with d.c. components
CN1604419A (en) * 2004-11-04 2005-04-06 河北工业大学 Dead-space free circuit breaker for earth leakage abrupt change and operation method thereof
CN201966574U (en) * 2011-03-30 2011-09-07 苏州工业园区非而智能电器有限公司 Intelligent electric leakage controller with three-section protection function
CN102170107A (en) * 2011-05-05 2011-08-31 浙江德菱科技有限公司 Integral intelligent moulded case circuit breaker with residual current protection action

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Denomination of invention: An intelligent residual leakage protection method

Effective date of registration: 20201130

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Pledgee: Yancheng Tinghu District Financing Guarantee Co., Ltd

Pledgor: JIANGSU FEAL ELECTRICAL APPLIANCES Co.,Ltd.

Registration number: Y2020320000232

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