CN2555577Y - Reactive power dynamic compensation controller - Google Patents

Reactive power dynamic compensation controller Download PDF

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Publication number
CN2555577Y
CN2555577Y CN 02274430 CN02274430U CN2555577Y CN 2555577 Y CN2555577 Y CN 2555577Y CN 02274430 CN02274430 CN 02274430 CN 02274430 U CN02274430 U CN 02274430U CN 2555577 Y CN2555577 Y CN 2555577Y
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China
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relay
circuit
power
termination
acquisition module
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Expired - Fee Related
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CN 02274430
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Chinese (zh)
Inventor
吴宝庆
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Daqing Oilfield Co Ltd
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Daqing Oilfield Co Ltd
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Priority to CN 02274430 priority Critical patent/CN2555577Y/en
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Anticipated expiration legal-status Critical
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Abstract

A reactive power dynamic compensation controller relates to a reactive power compensating device which adopts an electromotor as a power equipment. Current transformers L-1, L-2 and L-3 are respectively mounted at motor output lines a, b and c. One ends of L-1, L-2 and L-3 are respectively connected with the ends I-a, I-b and I-c of a collecting module IC-1. The ends P-7 and P-8 of the IC-1 are connected with the ends IN-6 and IN-7 of a communication interface U-15. The ends Q-1 and Q-2 of the U-15 are connected with the ends IN-10 and IN-11 of a singlechip IC-2. The ends P-00 to P-07 of the IC-2 are respectively connected with the end 1D to 8D of an output control module IC-7. The ends OUT-1 to OUT-3 of the IC-7 are respectively connected with an electrical source input end of the motor M through relays j-5, j-6 and j-7. The output ends of M are respectively connected with the ends a, b and c. Another ends of a, b and c are connected with the ends P-13, P-15 and P-17 of the IC-1. A compensating capacitor of the utility model adopts the dynamic compensation technology to eliminate the problems of over-compensation and undercompensation; the utility model also has the function of communication, which can display various kinds of data; the utility model works stably and reliably, and a perfect motor protecting device ensures the safe operation of the device.

Description

The reactive power dynamic compensation controller
Technical field: the utility model relates to a kind of be used as power reactive power compensation device of equipment of motor that adopts.
Background technology: the reactive power compensation of low-voltage distribution cabinet and motor generally adopts analog circuit at present, and promptly building-out capacitor is the segmentation cut-in manner, and its existence is easy to generate overcompensation and under-compensated shortcoming; Sort circuit does not have communication function, can not team control; Job insecurity.
Summary of the invention: the purpose of this utility model is a kind of reactive power dynamic compensation controller of development, solves overcompensation and under-compensated problem, and communication function, working stability are arranged again.It is made up of electric quantity data acquisition circuit 1, arithmetic control circuit 2, controlling output circuit 3; Electric quantity data acquisition circuit 1 is by acquisition module IC 1, three phase electric machine output line a, b, c, threephase current transformer L 1, L 2, L 3, communication interface U 15Form; Current transformer L 1, L 2, L 3Be enclosed within on three phase electric machine output line a, b, the c termination acquisition module IC of a line respectively 1Input P 13, a termination acquisition module IC of b line 1Input P 15, a termination acquisition module IC of c line 1Input P 17, current transformer L 1An end ground connection, current transformer L 1Another termination acquisition module IC 1Input Ia, current transformer L 2An end ground connection, current transformer L 2Another termination acquisition module IC 1Input I bEnd, current transformer L 3An end by ground, current transformer L 3Another termination acquisition module IC 1Input Ic, acquisition module IC 1Vcc termination power+EC, acquisition module IC 1END end ground connection, acquisition module IC 1Output P 7Connect communication interface U 15IN 6End, acquisition module IC 1Output P 8Connect communication interface U 15IN 7End.Arithmetic control circuit 2 is by single-chip microcomputer IC 2Form single-chip microcomputer IC 2IN 10Termination communication interface U 15O 1End, single-chip microcomputer IC 2IN 11Termination communication interface U 15O 2End.Controlling output circuit 3 is by control output module IC 7, relay j 5, relay j 6, relay j 7, three-phase power line A, B, C line, motor M form; Control output module IC 7Eight input 1D～8D end by row's cable respectively with single-chip microcomputer IC 2Eight output P 00～P 07End connects one to one.Control output module IC 7OUT 1End and relay j 5An end connect relay j 5The other end be connected with an end of power supply A phase line.Control output module IC 7OUT 2End and relay j 6An end connect relay j 6The other end be connected with an end of power supply B phase line.Control output module IC 7OUT 3End and relay j 7An end connect relay j 7The other end be connected with an end of power supply C phase line, the power input of another termination motor M of three-phase power line A, B, C, the output of motor M are connected with the other end of a, b, c line respectively.Acquisition module IC 1OUT 5End connects control output module IC 7L 4End.Operation principle: three-phase current, voltage, through electric quantity data acquisition module I C 1After the calculation process, by communication interface U 15Send single-chip microcomputer IC to 2, single-chip microcomputer IC 2The zero-crossing timing of voltage, current signal is judged comparison and timing, and the time difference of measuring is scaled the phase angle.Automatically calculate power factor (PF), be transferred to controlling output circuit, by control output module IC 7Control relay j 5, relay j 6, relay j 7The gating compensating circuit, the switching amount of control compensation electric capacity.The utility model building-out capacitor switching adopts the logical combination cut-in manner; adopt dynamic compensation technology; overcompensation and under-compensated problem have been eliminated; it also has communication function; can realize team control; display circuit can show various data, and thermostatic control makes its working stability reliable, and perfect electric motor protective device has guaranteed the safe operation of equipment.
Description of drawings: Fig. 1 is an electrical block diagram of the present utility model, and Fig. 2 is the electrical block diagram of embodiment.
Embodiment one: as Fig. 1, present embodiment is made up of electric quantity data acquisition circuit 1, arithmetic control circuit 2, controlling output circuit 3; Electric quantity data acquisition circuit 1 is by acquisition module IC 1, three phase electric machine output line a, b, c, threephase current transformer L 1, L 2, L 3, communication interface U 15Form; Current transformer L 1, L 2, L 3Be enclosed within on three phase electric machine output line a, b, the c termination acquisition module IC of a line respectively 1Input P 13, a termination acquisition module IC of b line 1Input P 15, a termination acquisition module IC of c line 1Input P 17, current transformer L 1An end ground connection, current transformer L 1Another termination acquisition module IC 1Input Ia, current transformer L 2An end ground connection, current transformer L 2Another termination acquisition module IC 1Input I bEnd, current transformer L 3An end ground connection, current transformer L 3Another termination acquisition module IC 1Input Ic, acquisition module IC 1Vcc termination power+EC, acquisition module IC 1END end ground connection, acquisition module IC 1Output P 7Connect communication interface U 15IN 6End, acquisition module IC 1Output P 8Connect communication interface U 15IN 7End.Arithmetic control circuit 2 is by single-chip microcomputer IC 2Form single-chip microcomputer IC 2Adopt the 89C55/52 model, single-chip microcomputer IC 2IN 10Termination communication interface U 15O 1End, single-chip microcomputer IC 2IN 11Termination communication interface U 15O 2End.Controlling output circuit 3 is by control output module IC 7, relay j 5, relay j 6, relay j 7, three-phase power line A, B, C line, motor M form, the control output module adopts the 74H377 model.Control output module IC 7Eight input 1D～8D end by row's cable respectively with single-chip microcomputer IC 2Eight output P 00～P 07End connects one to one.Control output module IC 7OUT 1End and relay j 5An end connect relay j 5The other end be connected with an end of power supply A phase line.Control output module IC 7OUT 2End and relay j 6An end connect relay j 6The other end be connected with an end of power supply B phase line.Control output module IC 7OUT 3End and relay j 7An end connect relay j 7The other end be connected with an end of power supply C phase line, the power input of another termination motor M of three-phase power line A, B, C, the output of motor M are connected with the other end of a, b, c line respectively.Acquisition module IC 1OUT 5End connects control output module IC 7L 4End.
Embodiment two: as Fig. 2, the difference of present embodiment and embodiment one is: set up communicating circuit interface 5, communicating circuit interface 5 is by U 13, U 14, U 16Three communicating circuit interfaces are formed communicating circuit interface U 13, U 14, U 16All adopt the RS485 model, communicating circuit interface U 13IN 13End and single-chip microcomputer IC 2P 10End connects, communicating circuit interface U 14IN 14End and single-chip microcomputer IC 2P 12End connects, communicating circuit interface U 16IN 16End and single-chip microcomputer IC 2P 13End connects, communicating circuit interface U 13, U 14, U 16OUT 13, OUT 14, OUT 16Port docks with the external communication circuit respectively, has realized networking monitoring.Other composition is identical with embodiment one with annexation.
Embodiment three: as Fig. 2, the difference of present embodiment and embodiment one, two is: increased keyboard-display circuit 4, keyboard-display circuit 4 is by decoder IC 4, show diode (LED) 1～LED 8Form; Decoder IC 4Adopt the CD4028 model, decoder IC 4P 00～P 07End respectively with show diode (LED) 1～LED 8Positive pole connect one to one, show diode (LED) 1～LED 8All minus earths.Decoder IC 4Four input A～D end by row's cable respectively with single-chip microcomputer IC 2Four output P 20～P 23Connect one to one decoder IC 4Vcc termination power+EC, decoder IC 4END end ground connection.Single-chip microcomputer IC 2Will data presented output to P 00～P 07Port passes through P simultaneously 20～P 23Select lines drives decoder IC 4The demonstration diode that gating will be lighted, all LED of high-speed strobe successively 1～LED 8, finish data and show.Other composition is identical with embodiment one, two with annexation.
Embodiment four: as Fig. 2, the difference of present embodiment and embodiment one, two, three is: increased thermostatically-controlled equipment 6, thermostatically-controlled equipment 6 is by transducer PT, potentiometer W 1, process chip U 91With process chip U 92, triode Q 11, triode Q 17, relay j 2, relay j 3, relay normally open contact j 21, relay normally open contact j 31, heater T, fan D form.Transducer PT adopts PT100 model, process chip U 91And U 92All adopt the LM324 model, the end of transducer PT and potentiometer W 1A stiff end and U 91IN 9End is connected, the other end of transducer PT and potentiometer W 1Another stiff end and ground be connected.Potentiometer W 1Sliding end and process chip U 92IN 10End links to each other, process chip U 91OUT 9Termination triode Q 11Base stage, Q 11Grounded emitter, triode Q 11Collector connecting relay j 2An end, relay j 2Another termination power+EC, process chip U 92OUT 10Termination triode Q 17Base stage, triode Q 17Grounded emitter, triode Q 17Collector connecting relay j 3An end, relay j 3Another termination power+EC, relay normally open contact j 21Movable contact meet AC power 220V, relay tip j 21Fixed contact connect the end of heater T, the other end ground connection of heater T, relay normally open contact j 31Movable contact meet AC power 220V, relay normally open contact j 31The end of fixed contact wind-receiving fan D, the other end ground connection of fan D.The resistance of transducer PT100 changes according to the variation of ambient temperature, when temperature is lower than 0 ℃, and triode Q 11Conducting, relay j 2The normal opened contact adhesive, relay normally open contact j 21Connect heater T heating.Relay j when temperature equals 0 ℃ 2Normal opened contact disconnects and stops heating, and when temperature was higher than 20 ℃, the resistance of transducer diminished, and made triode Q 17Conducting, relay j 3The normal opened contact adhesive, normal opened contact j 31Connect radiator fan work.When temperature equals 20 ℃, relay j 3Normal opened contact disconnect, fan quits work.Other composition is identical with embodiment one, two, three with annexation.
Embodiment five: as Fig. 2, the difference of present embodiment and embodiment one, two, three, four is: increased motor protective circuit 7 and failure alarm circuit 8, motor protective circuit 7 is by relay j 4, three relay normally closed contact j 41, j 42, j 43Form relay j 4Termination control output module IC 7OUT 4End, relay j 4Another termination power+EC, the input of three-phase power line is succeeded three normally closed contact j of electrical equipment respectively 41, j 42, j 43Movable contact, three normally closed contact j 41, j 42, j 43Fixed juncture connect respectively on three-phase power line A, B, the C of motor M.Failure alarm circuit 8 is by triode Q 10, relay j 1, alarm D 1, relay normally open contact j 11Form triode Q 10Base stage meet control output module IC 73Q end, triode Q 10Grounded emitter, transistor collector is succeeded electrical equipment j 1An end, relay j 1Another termination power+EC, relay normally open contact j 11Movable contact meet AC power 220V, relay normally open contact j 11Fixed contact device D taking alarm 1An end, alarm D 1Other end ground connection.The function of motor protective circuit 7 is to motor overvoltage protection, under-voltage protection, overcurrent protection, open-phase protection; The protection action is by relay j 4The normally closed contact group cut off three phase mains; Meanwhile alarm signal sends triode Q to 10Base stage, triode Q 10Conducting, relay j 1Normal opened contact j is connected in adhesive 11, by alarm D 1Report to the police.Other composition is identical with embodiment one, two, three, four with annexation.

Claims (5)

1, reactive power dynamic compensation controller, it is made up of electric quantity data acquisition circuit (1), arithmetic control circuit (2), controlling output circuit (3), it is characterized in that electric quantity data acquisition circuit (1) is by acquisition module IC 1, three phase electric machine output line a, b, c, threephase current transformer L 1, L 2, L 3, communication interface U 15Form; Current transformer L 1, L 2, L 3Be enclosed within on three phase electric machine output line a, b, the c termination acquisition module IC of a line respectively 1Input P 13, a termination acquisition module IC of b line 1Input P 15, a termination acquisition module IC of c line 1Input P 17, current transformer L 1An end ground connection, current transformer L 1Another termination acquisition module IC 1Input Ia, current transformer L 2An end ground connection, current transformer L 2Another termination acquisition module IC 1Input I bEnd, current transformer L 3An end ground connection, current transformer L 3Another termination acquisition module IC 1Input I c, acquisition module IC 1Vcc termination power+EC, acquisition module IC 1END end ground connection, acquisition module IC 1Output P 7Connect communication interface U 15IN 6End, acquisition module IC 1Output P 8Connect communication interface U 15IN 7End, arithmetic control circuit (2) is by single-chip microcomputer IC 2Form single-chip microcomputer IC 2IN 10Termination communication interface U 15O 1End, single-chip microcomputer IC 2IN 11Termination communication interface U 15O 2End, controlling output circuit (3) is by control output module IC 7, relay j 5, relay j 6, relay j 7, three-phase power line A, B, C line, motor M form; Control output module IC 7Eight input 1D～8D end by row's cable respectively with single-chip microcomputer IC 2Eight output P 00～P 07End connects one to one, control output module IC 7OUT 1End and relay j 5An end connect relay j 5The other end be connected control output module IC with an end of power supply A phase line 7OUT 2End and relay j 6An end connect relay j 6The other end be connected control output module IC with an end of power supply B phase line 7OUT 3End and relay j 7An end connect relay j 7The other end be connected with an end of power supply C phase line, the power input of another termination motor M of three-phase power line A, B, C, the output of motor M are connected acquisition module IC with the other end of a, b, c line respectively 1OUT 5End connects control output module IC 7L 4End.
2, reactive power dynamic compensation controller according to claim 1 is characterized in that it has set up communicating circuit interface (5), and communicating circuit interface (5) is by U 13, U 14, U 16Three communicating circuit interfaces are formed communicating circuit interface U 13IN 13End and single-chip microcomputer IC 2P 10End connects, communicating circuit interface U 14IN 14End and single-chip microcomputer IC 2P 12End connects, communicating circuit interface U 16IN 16End and single-chip microcomputer IC 2P 13End connects, communicating circuit interface U 13, U 14, U 16OUT 13, OUT 14, OUT 16Port docks with the external communication circuit respectively.
3, according to claim 1,2 described reactive power dynamic compensation controllers, it is characterized in that it has increased keyboard-display circuit (4), keyboard-display circuit (4) is by decoder IC 4, show diode (LED) 1～LED 8Form; Decoder IC 4P 00～P 07End respectively with show diode (LED) 1～LED 8Positive pole connect one to one, show diode (LED) 1～LED 8All minus earths, decoder IC 4Four input A～D end by row's cable respectively with single-chip microcomputer IC 2Four output P 20～P 23Connect one to one decoder IC 4Vcc termination power+EC, decoder IC 4END end ground connection.
4, reactive power dynamic compensation controller according to claim 3 is characterized in that it has increased thermostatically-controlled equipment (6), and thermostatically-controlled equipment (6) is by transducer PT, potentiometer W 1, process chip U 91With process chip U 92, triode Q 11, triode Q 17, relay j 2, relay j 3, relay normally open contact j 21, relay normally open contact j 31, heater T, fan D form the end of transducer PT and potentiometer W 1A stiff end and U 91IN 9End is connected, the other end of transducer PT and potentiometer W 1Another stiff end and ground be connected potentiometer W 1Sliding end and process chip U 92IN 10End links to each other, process chip U 91OUT 9Termination triode Q 11Base stage, Q 11Grounded emitter, triode Q 11Collector connecting relay j 2An end, relay j 2Another termination power+EC, process chip U 92OUT 10Termination triode Q 17Base stage, triode Q 17Grounded emitter, triode Q 17Collector connecting relay j 3An end, relay j 3Another termination power+EC, relay normally open contact j 21Movable contact meet AC power 220V, relay tip j 21Fixed contact connect the end of heater T, the other end ground connection of heater T, relay normally open contact j 31Movable contact meet AC power 220V, relay normally open contact j 31The end of fixed contact wind-receiving fan D, the other end ground connection of fan D.
5, according to claim 1,4 described reactive power dynamic compensation controllers, it is characterized in that it has increased motor protective circuit (7) and failure alarm circuit (8), motor protective circuit (7) is by relay j 4, three relay normally closed contact j 41, j 42, j 43Form relay j 4Termination control output module IC 7OUT 4End, relay j 4Another termination power+EC, the input of three-phase power line is succeeded three normally closed contact j of electrical equipment respectively 41, j 42, j 43Movable contact, three normally closed contact j 41, j 42, j 43Fixed juncture connect respectively on three-phase power line A, B, the C of motor M, failure alarm circuit (8) is by triode Q 10, relay j 1, alarm D 1, relay normally open contact j 11Form triode Q 10Base stage meet control output module IC 73Q end, triode Q 10Grounded emitter, transistor collector is succeeded electrical equipment j 1An end, relay j 1Another termination power+EC, relay normally open contact j 11Movable contact meet AC power 220V, relay normally open contact j 11Fixed contact device D taking alarm 1An end, alarm D 1Other end ground connection.
CN 02274430 2002-07-26 2002-07-26 Reactive power dynamic compensation controller Expired - Fee Related CN2555577Y (en)

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CN 02274430 CN2555577Y (en) 2002-07-26 2002-07-26 Reactive power dynamic compensation controller

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CN 02274430 CN2555577Y (en) 2002-07-26 2002-07-26 Reactive power dynamic compensation controller

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100463328C (en) * 2007-01-26 2009-02-18 哈尔滨工业大学 Rotating electromagnetic energy transformation device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100463328C (en) * 2007-01-26 2009-02-18 哈尔滨工业大学 Rotating electromagnetic energy transformation device

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