CN204694783U - A kind of detection phase sequence protection circuit - Google Patents

A kind of detection phase sequence protection circuit Download PDF

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Publication number
CN204694783U
CN204694783U CN201520313202.1U CN201520313202U CN204694783U CN 204694783 U CN204694783 U CN 204694783U CN 201520313202 U CN201520313202 U CN 201520313202U CN 204694783 U CN204694783 U CN 204694783U
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electrically connected
output terminal
triode
module
resistance
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CN201520313202.1U
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叶彬城
孟超
陈福
陈炜明
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AVIC Tech (Xiamen) electric power technology Limited by Share Ltd
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Avic Tech (xiamen) Electronics Co Ltd
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Abstract

The utility model is a kind of detection phase sequence protection circuit, can carry out phase-detection accurately and rapidly, avoid causing equipment breakdown because of misphase, change the mode of software detection in the past simultaneously, avoid output current wave to distort three-phase supply.Comprise a waveform amplitude limit Shaping Module, a three-phase comparison module, trigger module and level detection output module; Described waveform amplitude limit Shaping Module receives three-phase electricity to be detected and this three-phase electricity to be detected every phase civil power input sine wave is converted into square wave; Described three-phase comparison module compares between two by via transforming the rear signal exported after the signals reverse exported after the conversion of waveform amplitude limit Shaping Module again with its waveform amplitude limit Shaping Module; Described trigger module carries out judging after receiving the output signal of described three-phase comparison module and obtains an output signal; Described level detection output module receives the output signal of described igniter module and detects.

Description

A kind of detection phase sequence protection circuit
Technical field
The utility model relates to three-phase electricity detection field, and particularly one detects phase sequence protection circuit.
Background technology
Method many employings single-chip microcomputer of existing detection phase sequence carries out software phlase locking to reach the function detecting phase sequence, and such shortcoming is that complete software phlase locking easily causes inverter system output current wave to distort.Also has a kind of phase sequence detecting method be used in 380V electrical network more, adopt the phase sequence relay of capacitance-resistance phase-shift theory, its principle detecting phase sequence mistake builds capacitance-resistance phase shift network, by the phase shift superposing respectively of one group of voltage to be measured, when phase sequence connects correct, superimposed voltage phase differential is less than 180 °, and output voltage is enhanced; When phase sequence connects inverse time, the contrary output voltage of superimposed voltage phase place is approximately zero.This phase sequence relay, owing to being subject to the restriction of the withstand voltage and volume of Resistor-Capacitor Unit, cannot directly be applied and 1.14kV electrical network.
Utility model content
The utility model is a kind of detection phase sequence protection circuit, can carry out phase-detection accurately and rapidly, avoid causing equipment breakdown because of misphase, change the mode of software detection in the past simultaneously, avoid output current wave to distort three-phase supply.
For achieving the above object, technical solutions of the utility model are:
A kind of detection phase sequence protection circuit, comprises a waveform amplitude limit Shaping Module, a three-phase comparison module, trigger module and level detection output module; Described waveform amplitude limit Shaping Module receives three-phase electricity to be detected and this three-phase electricity to be detected every phase civil power input sine wave is converted into square wave; Described three-phase comparison module compares between two by via transforming the rear signal exported after the signals reverse exported after the conversion of waveform amplitude limit Shaping Module again with its waveform amplitude limit Shaping Module; Described trigger module carries out judging after receiving the output signal of described three-phase comparison module and obtains an output signal; Described level detection output module receives the output signal of described igniter module and detects.
Further, described waveform amplitude limit Shaping Module comprises squaring circuit A, squaring circuit B and squaring circuit C; Described squaring circuit A comprises power vd D, resistance R1, resistance R6, diode D3 and triode Q1, electric current is exported by the collector of described triode Q1 after the input of described resistance R1 one end, the described resistance R1 other end is electrically connected with the base stage of described triode Q1, the negative pole of described diode D3 is electrically connected with the base stage of described triode Q1, positive pole is electrically connected ground connection afterwards with the emitter of described triode Q1, the collector of described triode Q1 is electrically connected with described resistance R6 and accesses power vd D afterwards; Described squaring circuit B comprises power vd D, resistance R2, resistance R5, diode D2 and triode Q2, electric current is exported by the collector of described triode Q2 after the input of described resistance R2 one end, the described resistance R2 other end is electrically connected with the base stage of described triode Q2, the negative pole of described diode D2 is electrically connected with the base stage of described triode Q2, positive pole is electrically connected ground connection afterwards with the emitter of described triode Q2, the collector of described triode Q2 is electrically connected with described resistance R5 and accesses power vd D afterwards; Described squaring circuit C comprises power vd D, resistance R3, resistance R4, diode D1 and triode Q3, electric current is exported by the collector of described triode Q3 after the input of described resistance R3 one end, the described resistance R3 other end is electrically connected with the base stage of described triode Q3, the negative pole of described diode D1 is electrically connected with the base stage of described triode Q3, positive pole is electrically connected ground connection afterwards with the emitter of described triode Q3, the collector of described triode Q3 is electrically connected with described resistance R4 and accesses power vd D afterwards.
Further, described three-phase comparison module comprises not gate U1A, U2B, U3C, dual input and door U4A, U5B, U6C, the output terminal of described squaring circuit A is electrically connected with the input end of described not gate U1A, the output terminal of described not gate U1A is electrically connected with the described first input end with door U6C, and the output terminal of the circuit B that described square wave is whole is electrically connected with second input end of door U6C with described; The output terminal of described squaring circuit B is electrically connected with the input end of described not gate U2B, the output terminal of described not gate U2B is electrically connected with the described first input end with door U4A, and the output terminal of the circuit C that described square wave is whole is electrically connected with second input end of door U4A with described; The output terminal of described squaring circuit C is electrically connected with the input end of described not gate U3C, the output terminal of described not gate U3C is electrically connected with the described first input end with door U5B, and the output terminal of the circuit A that described square wave is whole is electrically connected with second input end of door U5B with described.
Further, described trigger module comprises trigger U7A, U8B and U9C, is describedly electrically connected with the input end D of described trigger U7A with the output terminal of door U4A, and the output terminal of described squaring circuit A is electrically connected with the input end CP of described trigger U7A; Describedly be electrically connected with the input end D of described trigger U8B with the output terminal of door U5B, the output terminal of described squaring circuit B is electrically connected with the input end CP of described trigger U8B; Describedly be electrically connected with the input end D of described trigger U9C with the output terminal of door U6C, the output terminal of described squaring circuit C is electrically connected with the input end CP of described trigger U9C.
Further, described level detection output module comprises three value and gate U10, the output terminal of the output terminal of described trigger U7A, the output terminal of described trigger U8B and described trigger U9C is all electrically connected with described three value and gate U10, and final signal is exported by described three value and gate U10.
From above-mentioned to description of the present utility model, compared to the prior art, the utility model tool has the following advantages:
One, circuit of the present utility model is simple, and the components and parts used are simple element, do not adopt single-chip microcomputer complicated program device, and therefore cost is low and be easy to realize.
Two, the utility model change used software phlase locking to detect phase sequence in the past, avoided output current wave to distort.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms a part of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is circuit composition frame chart of the present utility model;
Fig. 2 is circuit diagram of the present utility model.
Embodiment
In order to make technical problem to be solved in the utility model, technical scheme and beneficial effect clearly, understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
See figures.1.and.2, a kind of detection phase sequence protection circuit, comprises waveform amplitude limit Shaping Module 1, three-phase comparison module 2, trigger module 3 and level detection output module 4; Described waveform amplitude limit Shaping Module 1 receives three-phase electricity to be detected and this three-phase electricity to be detected every phase civil power input sine wave is converted into square wave; The signal transforming rear output with its waveform amplitude limit Shaping Module 1 again after transforming the signals reverse of rear output via waveform amplitude limit Shaping Module 1 compares by described three-phase comparison module 2 between two; Described trigger module 3 carries out judging after receiving the output signal of described three-phase comparison module 2 and obtains an output signal; Described level detection output module 4 receives the output signal of described igniter module 3 and detects.
Described waveform amplitude limit Shaping Module 1 comprises squaring circuit A, squaring circuit B and squaring circuit C; Described squaring circuit A comprises power vd D, resistance R1, resistance R6, diode D3 and triode Q1, electric current is exported by the collector of described triode Q1 after the input of described resistance R1 one end, the described resistance R1 other end is electrically connected with the base stage of described triode Q1, the negative pole of described diode D3 is electrically connected with the base stage of described triode Q1, positive pole is electrically connected ground connection afterwards with the emitter of described triode Q1, the collector of described triode Q1 is electrically connected with described resistance R6 and accesses power vd D afterwards; Described squaring circuit B comprises power vd D, resistance R2, resistance R5, diode D2 and triode Q2, electric current is exported by the collector of described triode Q2 after the input of described resistance R2 one end, the described resistance R2 other end is electrically connected with the base stage of described triode Q2, the negative pole of described diode D2 is electrically connected with the base stage of described triode Q2, positive pole is electrically connected ground connection afterwards with the emitter of described triode Q2, the collector of described triode Q2 is electrically connected with described resistance R5 and accesses power vd D afterwards; Described squaring circuit C comprises power vd D, resistance R3, resistance R4, diode D1 and triode Q3, electric current is exported by the collector of described triode Q3 after the input of described resistance R3 one end, the described resistance R3 other end is electrically connected with the base stage of described triode Q3, the negative pole of described diode D1 is electrically connected with the base stage of described triode Q3, positive pole is electrically connected ground connection afterwards with the emitter of described triode Q3, the collector of described triode Q3 is electrically connected with described resistance R4 and accesses power vd D afterwards.
Described three-phase comparison module 2 comprises not gate U1A, U2B, U3C, dual input and door U4A, U5B, U6C, the output terminal of described squaring circuit A is electrically connected with the input end of described not gate U1A, the output terminal of described not gate U1A is electrically connected with the described first input end with door U6C, and the output terminal of the circuit B that described square wave is whole is electrically connected with second input end of door U6C with described; The output terminal of described squaring circuit B is electrically connected with the input end of described not gate U2B, the output terminal of described not gate U2B is electrically connected with the described first input end with door U4A, and the output terminal of the circuit C that described square wave is whole is electrically connected with second input end of door U4A with described; The output terminal of described squaring circuit C is electrically connected with the input end of described not gate U3C, the output terminal of described not gate U3C is electrically connected with the described first input end with door U5B, and the output terminal of the circuit A that described square wave is whole is electrically connected with second input end of door U5B with described.
Described trigger module 3 comprises trigger U7A, U8B and U9C, is describedly electrically connected with the input end D of described trigger U7A with the output terminal of door U4A, and the output terminal of described squaring circuit A is electrically connected with the input end CP of described trigger U7A; Describedly be electrically connected with the input end D of described trigger U8B with the output terminal of door U5B, the output terminal of described squaring circuit B is electrically connected with the input end CP of described trigger U8B; Describedly be electrically connected with the input end D of described trigger U9C with the output terminal of door U6C, the output terminal of described squaring circuit C is electrically connected with the input end CP of described trigger U9C.
Described level detection output module 4 comprises three value and gate U10, the output terminal of the output terminal of described trigger U7A, the output terminal of described trigger U8B and described trigger U9C is all electrically connected with described three value and gate U10, and final signal is exported by described three value and gate U10.
When inputting phase sequence and being normal, A phase civil power input sine wave changes into square wave a through R1, Q1, D3, and namely R1, Q1, D3 constitute a waveform limiter shaping circuit; B phase civil power input sine wave changes into square wave b through R2, Q2, D2; C phase civil power input sine wave changes into square wave c through R3, Q3, D1; Square wave a inputs to the CP end of U7A, b oppositely after again with c with after be input to U7A D hold; Square wave b inputs to the CP end of U8B, c oppositely after again with a with after be input to U8B D hold; Square wave c inputs to the CP end of U9C, a oppositely after again with b with after be input to U9C D hold; When input phase sequence is normal, the output terminal Q of U7A, U8B, U9C exports as high level, and U10 finally exports high level, during input phase sequence mistake, and U10 output low level.
Above-mentioned explanation illustrate and describes preferred embodiment of the present utility model, as previously mentioned, be to be understood that the utility model is not limited to the form disclosed by this paper, should not regard the eliminating to other embodiments as, and can be used for other combinations various, amendment and environment, and can in utility model contemplated scope described herein, changed by the technology of above-mentioned instruction or association area or knowledge.And the change that those skilled in the art carry out and change do not depart from spirit and scope of the present utility model, then all should in the protection domain of the utility model claims.

Claims (5)

1. detect a phase sequence protection circuit, it is characterized in that: comprise a waveform amplitude limit Shaping Module, a three-phase comparison module, trigger module and level detection output module; Described waveform amplitude limit Shaping Module receives three-phase electricity to be detected and this three-phase electricity to be detected every phase civil power input sine wave is converted into square wave; Described three-phase comparison module compares between two by via transforming the rear signal exported after the signals reverse exported after the conversion of waveform amplitude limit Shaping Module again with its waveform amplitude limit Shaping Module; Described trigger module carries out judging after receiving the output signal of described three-phase comparison module and obtains an output signal; Described level detection output module receives the output signal of described igniter module and detects.
2. a kind of detection phase sequence protection circuit as claimed in claim 1, is characterized in that: described waveform amplitude limit Shaping Module comprises squaring circuit A, squaring circuit B and squaring circuit C; Described squaring circuit A comprises power vd D, resistance R1, resistance R6, diode D3 and triode Q1, electric current is exported by the collector of described triode Q1 after the input of described resistance R1 one end, the described resistance R1 other end is electrically connected with the base stage of described triode Q1, the negative pole of described diode D3 is electrically connected with the base stage of described triode Q1, positive pole is electrically connected ground connection afterwards with the emitter of described triode Q1, the collector of described triode Q1 is electrically connected with described resistance R6 and accesses power vd D afterwards; Described squaring circuit B comprises power vd D, resistance R2, resistance R5, diode D2 and triode Q2, electric current is exported by the collector of described triode Q2 after the input of described resistance R2 one end, the described resistance R2 other end is electrically connected with the base stage of described triode Q2, the negative pole of described diode D2 is electrically connected with the base stage of described triode Q2, positive pole is electrically connected ground connection afterwards with the emitter of described triode Q2, the collector of described triode Q2 is electrically connected with described resistance R5 and accesses power vd D afterwards; Described squaring circuit C comprises power vd D, resistance R3, resistance R4, diode D1 and triode Q3, electric current is exported by the collector of described triode Q3 after the input of described resistance R3 one end, the described resistance R3 other end is electrically connected with the base stage of described triode Q3, the negative pole of described diode D1 is electrically connected with the base stage of described triode Q3, positive pole is electrically connected ground connection afterwards with the emitter of described triode Q3, the collector of described triode Q3 is electrically connected with described resistance R4 and accesses power vd D afterwards.
3. a kind of detection phase sequence protection circuit as claimed in claim 2, it is characterized in that: described three-phase comparison module comprises not gate U1A, U2B, U3C, dual input and door U4A, U5B, U6C, the output terminal of described squaring circuit A is electrically connected with the input end of described not gate U1A, the output terminal of described not gate U1A is electrically connected with the described first input end with door U6C, and the output terminal of the circuit B that described square wave is whole is electrically connected with second input end of door U6C with described; The output terminal of described squaring circuit B is electrically connected with the input end of described not gate U2B, the output terminal of described not gate U2B is electrically connected with the described first input end with door U4A, and the output terminal of the circuit C that described square wave is whole is electrically connected with second input end of door U4A with described; The output terminal of described squaring circuit C is electrically connected with the input end of described not gate U3C, the output terminal of described not gate U3C is electrically connected with the described first input end with door U5B, and the output terminal of the circuit A that described square wave is whole is electrically connected with second input end of door U5B with described.
4. a kind of detection phase sequence protection circuit as claimed in claim 3, it is characterized in that: described trigger module comprises trigger U7A, U8B and U9C, describedly be electrically connected with the input end D of described trigger U7A with the output terminal of door U4A, the output terminal of described squaring circuit A is electrically connected with the input end CP of described trigger U7A; Describedly be electrically connected with the input end D of described trigger U8B with the output terminal of door U5B, the output terminal of described squaring circuit B is electrically connected with the input end CP of described trigger U8B; Describedly be electrically connected with the input end D of described trigger U9C with the output terminal of door U6C, the output terminal of described squaring circuit C is electrically connected with the input end CP of described trigger U9C.
5. a kind of detection phase sequence protection circuit as claimed in claim 4; it is characterized in that: described level detection output module comprises three value and gate U10; the output terminal of the output terminal of described trigger U7A, the output terminal of described trigger U8B and described trigger U9C is all electrically connected with described three value and gate U10, and final signal is exported by described three value and gate U10.
CN201520313202.1U 2015-05-15 2015-05-15 A kind of detection phase sequence protection circuit Active CN204694783U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106026030A (en) * 2016-05-13 2016-10-12 南京铁道职业技术学院 Traction elevator three-phase AC phase sequence protector and protection method
CN106253212A (en) * 2016-08-24 2016-12-21 国网山东省电力公司单县供电公司 A kind of lack zero, phase shortage, phase sequence mistake power-off protection apparatus
WO2019037029A1 (en) * 2017-08-24 2019-02-28 深圳欣锐科技股份有限公司 Method and device for detecting phase sequence of three-phase power supply
CN111064482A (en) * 2018-10-16 2020-04-24 青岛海信移动通信技术股份有限公司 Equipment and method for suppressing interference

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106026030A (en) * 2016-05-13 2016-10-12 南京铁道职业技术学院 Traction elevator three-phase AC phase sequence protector and protection method
CN106026030B (en) * 2016-05-13 2018-12-04 南京铁道职业技术学院 A kind of towed elevator phase order of 3-phase AC protector and guard method
CN106253212A (en) * 2016-08-24 2016-12-21 国网山东省电力公司单县供电公司 A kind of lack zero, phase shortage, phase sequence mistake power-off protection apparatus
CN106253212B (en) * 2016-08-24 2018-07-31 国网山东省电力公司单县供电公司 One kind lacking zero, phase shortage, phase sequence mistake power-off protection apparatus
WO2019037029A1 (en) * 2017-08-24 2019-02-28 深圳欣锐科技股份有限公司 Method and device for detecting phase sequence of three-phase power supply
CN111064482A (en) * 2018-10-16 2020-04-24 青岛海信移动通信技术股份有限公司 Equipment and method for suppressing interference

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Address after: Xinle Road, Haicang District of Xiamen city of Fujian Province, No. 26 361000

Patentee after: AVIC Tech (Xiamen) electric power technology Limited by Share Ltd

Address before: Xinle Road, Haicang District of Xiamen city of Fujian Province, No. 26 361000

Patentee before: AVIC Tech (Xiamen) Electronics Co., Ltd.