CN202197094U - Power transmission line intelligent fault monitoring coupling power supply protective device - Google Patents

Power transmission line intelligent fault monitoring coupling power supply protective device Download PDF

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Publication number
CN202197094U
CN202197094U CN2011202482477U CN201120248247U CN202197094U CN 202197094 U CN202197094 U CN 202197094U CN 2011202482477 U CN2011202482477 U CN 2011202482477U CN 201120248247 U CN201120248247 U CN 201120248247U CN 202197094 U CN202197094 U CN 202197094U
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CN
China
Prior art keywords
circuit
mosfet
resistance
coil
power
Prior art date
Application number
CN2011202482477U
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Chinese (zh)
Inventor
黄松
邢铀
孔武
陈钦柱
姚冬
钱冠军
高峰
Original Assignee
海南电力试验研究所
武汉三相电力科技有限公司
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Application filed by 海南电力试验研究所, 武汉三相电力科技有限公司 filed Critical 海南电力试验研究所
Priority to CN2011202482477U priority Critical patent/CN202197094U/en
Application granted granted Critical
Publication of CN202197094U publication Critical patent/CN202197094U/en

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Abstract

Provided is a power transmission line intelligent fault monitoring coupling power supply protection apparatus. The protection apparatus is parallelly connected with an impact current protection circuit at the output end of a draw-out power coil, with the impact current protection circuit comprising serially connected transient voltage inhibitor, dissipating energy resistor, and coil having winding direction opposite to the winding direction of the draw-out power coil. The input end of the DC/DC transformation circuit is connected with a discharge circuit in parallel, with the discharge circuit comprising a dissipating energy resistor, a MOSFET, a voltage-regulator diode, a protection resistor, and two divider resistors, wherein the drain electrode of the MOSFET is connected with the dissipating energy resistor and then is connected with the input end of the high potential of the DC/DC transformation circuit; and a source is connected with the input end of the low potential of the DC/DC transformation circuit. One end of the voltage-regulator diode, serially connected with the two divider resistors, is connected to the low potential input end of the DC/DC transformation circuit while the other end of the voltage-regulator diode is connected to the high potential input end of the DC/DC transformation circuit. The gate of the MOSFET, serially connected with a protection resistor, is connected between the two divider resistors. The impact current protection circuit is utilized for preventing the damage upon a power supply system caused by the power transmission bus impact current. The discharge circuit is utilized for carrying out power supply system overvoltage protection.

Description

Transmission line intelligent trouble monitoring coupling power protective device

Affiliated technical field

The utility model relates to a kind of apparatus for protecting power supply, especially transmission line detect, the protective device of monitoring device coupling power, mainly be to be used for solving transmission of electricity bus impulse current and power-supply system overvoltage to the hurtful problem of power-supply system.

Background technology

At present, be used for detection, the monitoring device of ultra-high-tension power transmission line, much take directly to get the supply power mode of ability from the coupling of transmission of electricity bus.This power-supply system is installed the coil that has special iron core on transmission pressure, through the mode of electromagnetic induction electric energy is taken out from high voltage bus, supplies with detection, monitoring device use through the constant voltage of a series of conversion output then.But; The design difficulty of this power-supply system is; When the transmission of electricity bus flows through impulse current when lightning current, serious short circuit (for example short-circuit impact electric current); Induce great induced voltage at secondary side in the utmost point short time,, thereby cause the infringement of power-supply system considerably beyond the power-supply system input voltage range.

In addition; Get can coil output voltage raise with the rising of transmission line operating current; Yet the transmission line running current changes in a big way at one usually; When transmission current is excessive cause get can coil induced voltage too high, make rear end DC/DC translation circuit input voltage also can cause damage when exceeding its permissible value to power-supply system.

Summary of the invention

In order to solve the infringement that impulse current and overvoltage cause power-supply system; The utility model provides a kind of apparatus for protecting power supply; Utilize this device can monitor the secondary side induced voltage in real time; When power-supply system suffers impulse current, utilize a front-end protection circuit that the input voltage of power-supply system is limited within the safe voltage scope; Utilize a leadage circuit, when the power-supply system overvoltage, guarantee system safety.

The utility model solves the technical scheme that its technical problem adopted: getting and can a surge protection circuit be set the coil output; The surge protection circuit by one with get can coil winding-direction opposite coil, a Transient Voltage Suppressor and resistance be composed in series; Transient Voltage Suppressor has the bidirectional protective effect; Transient Voltage Suppressor is connected with power consumption resistance; After the series connection more respectively with get can coil output and an output of reverse winding link to each other, the other end of reverse winding links to each other with the other end of getting the ability coil, reverse winding is identical with the number of turn of getting the ability coil and around on the contrary; Reverse winding with get the terminal that can coil directly links to each other and must guarantee to be non-same polarity, the surge protection circuit is with to get ability coil output parallelly connected.When the transmission line electric current was in normal range of operation, Transient Voltage Suppressor was in off state, can not influence the normal operation of power-supply system, and its voltage can coil output voltage and reverse winding output voltage sum for getting.When transmission line suffers impulse current; Get ability coil, the rising of reverse winding output end voltage; Make the Transient Voltage Suppressor conducting, get ability circuit and surge protection circuit and form the closed-loop path, thereby the output voltage that will get the ability coil is controlled within the safe range; Utilize the resistance in the surge protection circuit that energy consumption is fallen simultaneously, avoid coil overheated.

A leadage circuit is set between rectification circuit and DC/DC translation circuit; Vent discharge routing zener, MOSFET and resistance are formed; MOSFET selects N channel enhancement P-MOSFET for use, and the MOSFET drain electrode seals in a power consumption resistance and receives DC/DC translation circuit input, and two divider resistances of voltage stabilizing didoe series connection also connect DC/DC translation circuit input; The grid of MOSFET is received between two divider resistances, and leadage circuit is parallelly connected with the input of DC/DC translation circuit.When the input terminal voltage rising of DC/DC translation circuit causes the grid-source voltage of MOSFET to surpass cut-in voltage, the MOSFET conducting, leadage circuit plays a role, and excess energy is released through power consumption resistance.When the input terminal voltage of DC/DC translation circuit was within safe range, MOSFET and voltage stabilizing didoe all turn-offed, and leadage circuit can not have any impact to power-supply system.

The utility model utilizes front end surge protection circuit and leadage circuit to constitute dual-electrode protecting circuit; Utilize front end surge protection circuit to deal with the infringement that the impulse current in the inlet highway causes power-supply system; Utilize leadage circuit to deal with the overvoltage infringement of power-supply system; Simple in structure, protection is reliable.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further specified.

Fig. 1 is the functional-block diagram of power supply and protective device.

Fig. 2 is a front end impulse current protective circuit.

Fig. 3 is the overpressure vent circuit.

Fig. 4 is Fig. 2, Fig. 3 whole structure figure in Fig. 1

1. iron cores among the figure, 2. just around to get can coil, 3. back-roll to impulse current protection coil, 4. transmission pressure; 5. Transient Voltage Suppressor, 6. power consumption resistance, 7. voltage stabilizing didoe, 8. divider resistance; 9. divider resistance, 10. protective resistance, 11.MOSFET, 12. power consumption resistance.

Embodiment

In Fig. 1, the output termination current rectifying and wave filtering circuit input of surge protection circuit, the output of current rectifying and wave filtering circuit connects leadage circuit, electric capacity of voltage regulation, DC/DC translation circuit, and leadage circuit, electric capacity of voltage regulation, DC/DC translation circuit three constitute parallel connection.The stable voltage of DC/DC translation circuit output supplies to detect, monitoring device uses.

In Fig. 2; Transient Voltage Suppressor (5), power consumption resistance (6) and reverse winding (3) series connection; And be connected to get can coil the output of (2); Coil (2), coil (3) take the number of turn identical and around on the contrary, coil (1) adopts the special loop coil that has air gap, the protection of the transient state induced voltage that the shutoff through Transient Voltage Suppressor (5) and conducting realization cause impulse current on the bus.

In Fig. 3; Power consumption resistance (12) one terminates to the drain electrode of MOSFET (11); The other end is received the hot end of DC/DC translation circuit input; The source electrode of MOSFET (11) is received the cold end of DC/DC translation circuit input; Voltage stabilizing didoe (7) one ends are linked the hot end of DC/DC translation circuit input, and the cold end of DC/DC translation circuit input is linked in other end series connection two divider resistances (8), (9), and the grid of MOSFET (11) seals in a protective resistance (10) and receives between divider resistance (8), (9).Limit the voltage in the circuit through voltage stabilizing didoe (7), when having overvoltage in the circuit, voltage stabilizing didoe is breakdown, and divider resistance (9) voltage rises, and causes MOSFET (11) gate-source voltage to surpass cut-in voltage, MOSFET (11) the conducting unnecessary electric energy of releasing.

Claims (3)

1. a transmission line intelligent trouble monitoring coupling power protective device is characterized in that: getting impulse current protective circuit of output parallel connection of ability coil, at leadage circuit that prevents overvoltage of input parallel connection of the DC/DC of power-supply system conversion module.
2. transmission line intelligent trouble monitoring coupling power protective device according to claim 1; It is characterized in that: the surge protection circuit is made up of Transient Voltage Suppressor (5), power consumption resistance (6) and reverse winding (3); Transient Voltage Suppressor (5) has the bidirectional protective effect; Transient Voltage Suppressor (5) one ends are linked an output getting the ability coil; The other end connects an end of power consumption resistance (6), and the other end of power consumption resistance (6) is linked an output of reverse winding (3), and the other end of reverse winding (3) links to each other with the other end of getting ability coil (2); Reverse winding (3) with get can coil the number of turn of (2) identical and around on the contrary, reverse winding (3) with get the terminal that ability coil (2) directly links to each other and must guarantee to be non-same polarity.
3. transmission line intelligent trouble monitoring coupling power protective device according to claim 1; It is characterized in that leadage circuit is made up of power consumption resistance (12), MOSFET (11), voltage stabilizing didoe (7), divider resistance (8), divider resistance (9) and a protective resistance (10); MOSFET selects N channel enhancement P-MOSFET for use; Power consumption resistance (12) one terminates to the drain electrode of MOSFET (11); The other end is received DC/DC translation circuit high potential input, and the source electrode of MOSFET (11) is received DC/DC translation circuit electronegative potential input, and voltage stabilizing didoe (7) one ends are linked DC/DC translation circuit high potential input; DC/DC translation circuit electronegative potential input is linked in other end series connection two divider resistances (8), (9), and the grid of MOSFET (11) seals in a protective resistance (10) and receives between divider resistance (8), the divider resistance (9).
CN2011202482477U 2011-07-07 2011-07-07 Power transmission line intelligent fault monitoring coupling power supply protective device CN202197094U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011202482477U CN202197094U (en) 2011-07-07 2011-07-07 Power transmission line intelligent fault monitoring coupling power supply protective device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011202482477U CN202197094U (en) 2011-07-07 2011-07-07 Power transmission line intelligent fault monitoring coupling power supply protective device

Publications (1)

Publication Number Publication Date
CN202197094U true CN202197094U (en) 2012-04-18

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CN2011202482477U CN202197094U (en) 2011-07-07 2011-07-07 Power transmission line intelligent fault monitoring coupling power supply protective device

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CN (1) CN202197094U (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103929053A (en) * 2013-01-15 2014-07-16 安捷伦科技有限公司 Energy dissipating device for DC power supplies
CN104301426A (en) * 2014-10-27 2015-01-21 国家电网公司 Wireless communication system of electric transmission line on-line monitoring system
CN106953371A (en) * 2017-04-24 2017-07-14 许继集团有限公司 A kind of alternating current CT energy taking devices and anti-overvoltage circuit
CN107394749A (en) * 2017-08-23 2017-11-24 惠州拓邦电气技术有限公司 A kind of protection circuit
CN107482578A (en) * 2017-09-26 2017-12-15 湖州积微电子科技有限公司 Low-power consumption overvoltage is automatic to disconnect protection device and frequency converter
CN108574272A (en) * 2017-03-08 2018-09-25 中惠创智无线供电技术有限公司 A kind of protection circuit and wireless power supply system applied to wireless power supply system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103929053A (en) * 2013-01-15 2014-07-16 安捷伦科技有限公司 Energy dissipating device for DC power supplies
CN103929053B (en) * 2013-01-15 2018-02-13 是德科技股份有限公司 Energy consumption equipment for dc source
CN104301426A (en) * 2014-10-27 2015-01-21 国家电网公司 Wireless communication system of electric transmission line on-line monitoring system
CN104301426B (en) * 2014-10-27 2018-03-30 国家电网公司 A kind of wireless communication system of transmission line of electricity online monitoring system
CN108574272A (en) * 2017-03-08 2018-09-25 中惠创智无线供电技术有限公司 A kind of protection circuit and wireless power supply system applied to wireless power supply system
CN106953371A (en) * 2017-04-24 2017-07-14 许继集团有限公司 A kind of alternating current CT energy taking devices and anti-overvoltage circuit
CN106953371B (en) * 2017-04-24 2020-02-21 许继集团有限公司 Alternating current CT energy taking device and overvoltage preventing circuit
CN107394749A (en) * 2017-08-23 2017-11-24 惠州拓邦电气技术有限公司 A kind of protection circuit
CN107394749B (en) * 2017-08-23 2020-05-26 惠州拓邦电气技术有限公司 Protective circuit
CN107482578A (en) * 2017-09-26 2017-12-15 湖州积微电子科技有限公司 Low-power consumption overvoltage is automatic to disconnect protection device and frequency converter

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120418

Termination date: 20120707