CN203056535U - Passive microcomputer protection device - Google Patents

Passive microcomputer protection device Download PDF

Info

Publication number
CN203056535U
CN203056535U CN 201320071049 CN201320071049U CN203056535U CN 203056535 U CN203056535 U CN 203056535U CN 201320071049 CN201320071049 CN 201320071049 CN 201320071049 U CN201320071049 U CN 201320071049U CN 203056535 U CN203056535 U CN 203056535U
Authority
CN
China
Prior art keywords
circuit
microcomputer protecting
output winding
tripping
passive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN 201320071049
Other languages
Chinese (zh)
Inventor
彭庆海
郭锋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NAHO ELECTRIC POWER TECHNOLOGY CO., LTD.
Original Assignee
ZHEJIANG NANRUI ELECTRIC POWER AUTOMATION CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZHEJIANG NANRUI ELECTRIC POWER AUTOMATION CO Ltd filed Critical ZHEJIANG NANRUI ELECTRIC POWER AUTOMATION CO Ltd
Priority to CN 201320071049 priority Critical patent/CN203056535U/en
Application granted granted Critical
Publication of CN203056535U publication Critical patent/CN203056535U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model provides a passive microcomputer protection device which comprises an energy obtainment circuit and a protection circuit which are respectively arranged at two sides of an input coil and an output coil. The protection circuit comprises a lithium battery which is connected with a signal processor which is respectively connected with a trip energy storage capacitor and a trip coil through a trip relay. A technical problem of low action reliability of a protection device powered by a traditional AC power supply in a short circuit fault is solved, and the passive microcomputer protection device is a microcomputer protection device capable of working stably without the aid of an operating power supply.

Description

Passive microcomputer protecting device
Technical field
The utility model relates to electronic technology, specifically a kind of microcomputer protecting device that does not have operating power.
Background technology
In electric power system, because faults such as ground connection, short circuit, overload can take place factors such as external force, overvoltage, ageing of insulation, operate miss, design defect, operations staff's safety and equipment is worked the mischief.For the harm that reduces or avoid bringing thus, adopt protective relaying device to distinguish normal, the undesired and malfunction of electric power, and make corresponding processing, as safeguard measures such as signalling and tripping operations.Along with the development of automatic technology, computer technology is applied in protective relaying device and system and promotes, and it is increasingly automated day by day to have promoted electric power system simultaneously.
Power system relay protection device need have a stable working power in the course of the work, and this power supply is generally provided by following three kinds of modes:
1, power plant or transformer station (be called for short factory station) to use transformer-supplied, its principle be to provide AC power by power plant or transformer station with transformer.There is following defective in this supply power mode: the first, supply voltage is bigger with power network fluctuation; The second, the surge composition is bigger in the power supply, easily causes protective relaying device to damage; When three, being short-circuited fault, voltage sharply descends even decompression near the fault point, and this supply voltage also descends thereupon, and protective relaying device will be because of the decompression tripping, thereby causes accident to enlarge.
2, power supply inlet wire PT(voltage transformer), its principle are to install in the transforming plant lead-in side to get the energy instrument transformer, and the operating power of system is provided.The defective of this supply power mode is stood similar with the defective of transformer-supplied mode to factory: the first, supply voltage is bigger with power network fluctuation; The second, the surge composition is bigger in the power supply, easily causes protective relaying device to damage; When three, being short-circuited fault, voltage sharply descends even decompression near the fault point, and this supply voltage also descends thereupon, and protective relaying device will be because of the decompression tripping, thereby causes accident to enlarge.
3, DC power supply panel power supply, its principle be to use factory (power plant), stand (transformer station) with the charging of transformer alternating power supply accumulators group, provides reliable and stable direct current operative power source after batteries being adjusted voltage again, powers then.The defective of this supply power mode is: the first, the direct current cabinet investment is bigger, and the line service amount; The second, batteries is higher to the environment for use temperature requirement, generally is 0~40 ℃; Three, the life of storage battery is shorter.
In recent years, along with the change of urban form, the ring main unit of preassembled transformer station (also claiming box-type substation) and high reliability is adopted in a large number.Both all have characteristics such as compact conformation, reliable in action, and have made up installation in device fabrication producer, and on-the-spot needs a spot of pedestal construction to get final product, and the installation time is very short, has improved the efficient of power construction greatly.But owing to both generally adopt factory, standing provides operating power with transformer or inlet wire PT, when closely being short-circuited fault, occurs the operating power decompression probably, thereby causes relay protection device tripping or malfunction, reliability is low.
The utility model content
For this reason, technical problem to be solved in the utility model is protective device low defective of reliable in action when short trouble of conventional AC power supply, thereby proposes a kind of microcomputer protecting device that can not get final product steady operation by operating power.
For solving the problems of the technologies described above; of the present utility modelly provide a kind of passive microcomputer protecting device; comprise and get energy circuit and protective circuit; described get can circuit and protective circuit be separately positioned on input coil and output winding both sides; described protective circuit comprises lithium battery; described lithium battery is connected with signal processor, and described signal processor is connected with breaking coil with the tripping operation storage capacitor respectively by tripping relay.
Described getting can circuit be in alternating current power taking, voltage transformer power taking or the current transformer power taking any.
Described getting can be connected with described input coil with pulse width modulated device by the over-voltage over-current protection device by circuit.
Described signal processor is connected with liquid crystal display, keyboard input devices and communication interface equipment.
Described input coil is one, and described output winding comprises first output winding and second output winding, and lithium cell charging power supply and tripping operation storage capacitor charge power supply are provided respectively.
Be connected by rectifier diode between described first output winding and the lithium battery.
Be connected by rectifier diode between described second output winding and the described tripping operation storage capacitor.
Technique scheme of the present utility model has the following advantages compared to existing technology; passive microcomputer protecting device described in the utility model; described getting can circuit be in alternating current power taking, voltage transformer power taking or the current transformer power taking any; described getting can be connected with described input coil with pulse width modulated device by the over-voltage over-current protection device by circuit; the electric energy input of arbitrary road; can keep the operate as normal of microcomputer protecting device, and to built-in lithium battery and the charging of tripping operation storage capacitor.When no electric energy was imported, microcomputer protecting device entered the resting state of little power consumption, is powered by built-in lithium battery.When detecting the outside line fault, tripping relay starts, and uses the stored electric energy of tripping operation storage capacitor to start the circuit breaker trip coil.With the use occasion steady operation at no stable operation power supply, the reliable tripping circuit breaker of energy makes the stability of protection be greatly improved when closely short circuit decompression occurring.Passive microcomputer protecting device described in the utility model; no operating power gets final product the microcomputer protecting device of steady operation; solved protective device low defective of reliable in action when short trouble of conventional AC power supply, made microcomputer protecting device obtain promoting at preassembled transformer station and ring main unit.
Description of drawings
Content of the present utility model is easier clearly to be understood in order to make, and according to specific embodiment of the utility model also by reference to the accompanying drawings, the utility model is described in further detail, wherein below
Fig. 1 is the structural representation of passive microcomputer protecting device described in the utility model.
Embodiment
Provide a concrete execution mode of passive microcomputer protecting device described in the utility model below; described passive microcomputer protecting device; there is not the operating power microcomputer protecting device as NR-650; as shown in Figure 1; comprise and get energy circuit and protective circuit; described getting can circuit be in alternating current power taking, voltage transformer power taking or the current transformer power taking any, and described getting can be connected with described input coil with pulse width modulated device by the over-voltage over-current protection device by circuit.
Described get can circuit and protective circuit be separately positioned on input coil and output winding both sides; described input coil is one; two of described output windings comprise first output winding and second output winding, and lithium cell charging power supply and tripping operation storage capacitor charge power supply are provided respectively.Described protective circuit comprises lithium battery, and described lithium battery is connected with signal processor, is connected by rectifier diode between described first output winding and the lithium battery.Described signal processor is connected with breaking coil with the tripping operation storage capacitor respectively by tripping relay.Described output winding is connected by rectifier diode between the storage capacitor with tripping operation.Described signal processor is connected with liquid crystal display, keyboard input devices and communication interface equipment.
Microcomputer protecting device described in the utility model adopts AC power, PT(voltage transformer) power taking and CT(current transformer) combine get can mode.Arbitrary road electric energy is imported, and can keep the operate as normal of microcomputer protecting device, and to built-in lithium battery and the charging of tripping operation storage capacitor.When no electric energy was imported, microcomputer protecting device entered the resting state of little power consumption, is powered by built-in lithium battery.When detecting the outside line fault, tripping relay starts, and uses the stored electric energy of tripping operation storage capacitor to start the circuit breaker trip coil.
Microcomputer protecting device described in the utility model can be at the use occasion steady operation of no stable operation power supply; the reliable tripping circuit breaker of energy when closely short circuit decompression occurring; make the stability of protection be greatly improved, make this device obtain popularization at preassembled transformer station (box-type substation) and ring main unit.
Obviously, above-described embodiment only is for example clearly is described, and is not the restriction to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all execution modes exhaustive.And the apparent variation of being extended out thus or change still are among the protection range of the invention.

Claims (7)

1. passive microcomputer protecting device; comprise and get energy circuit and protective circuit; described get can circuit and protective circuit be separately positioned on input coil and output winding both sides; it is characterized in that: described protective circuit comprises lithium battery; described lithium battery is connected with signal processor, and described signal processor is connected with breaking coil with the tripping operation storage capacitor respectively by tripping relay.
2. passive microcomputer protecting device according to claim 1 is characterized in that: described getting can circuit be in alternating current power taking, voltage transformer power taking or the current transformer power taking any.
3. passive microcomputer protecting device according to claim 2 is characterized in that, described getting can be connected with described input coil with pulse width modulated device by the over-voltage over-current protection device by circuit.
4. according to claim 1 or 2 or 3 described passive microcomputer protecting devices, it is characterized in that described signal processor is connected with liquid crystal display, keyboard input devices and communication interface equipment.
5. according to claim 1 or 2 or 3 described passive microcomputer protecting devices; it is characterized in that; described input coil is one, and described output winding comprises first output winding and second output winding, and lithium cell charging power supply and tripping operation storage capacitor charge power supply are provided respectively.
6. passive microcomputer protecting device according to claim 5 is characterized in that, is connected by rectifier diode between described first output winding and the lithium battery.
7. passive microcomputer protecting device according to claim 6 is characterized in that, is connected by rectifier diode between described second output winding and the described tripping operation storage capacitor.
CN 201320071049 2013-02-07 2013-02-07 Passive microcomputer protection device Active CN203056535U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320071049 CN203056535U (en) 2013-02-07 2013-02-07 Passive microcomputer protection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320071049 CN203056535U (en) 2013-02-07 2013-02-07 Passive microcomputer protection device

Publications (1)

Publication Number Publication Date
CN203056535U true CN203056535U (en) 2013-07-10

Family

ID=48739455

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201320071049 Active CN203056535U (en) 2013-02-07 2013-02-07 Passive microcomputer protection device

Country Status (1)

Country Link
CN (1) CN203056535U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104577971A (en) * 2014-12-26 2015-04-29 余姚市嘉荣电子电器有限公司 Outage trip protection plug

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104577971A (en) * 2014-12-26 2015-04-29 余姚市嘉荣电子电器有限公司 Outage trip protection plug
CN104577971B (en) * 2014-12-26 2017-11-14 余姚市嘉荣电子电器有限公司 Power off trip protection plug

Similar Documents

Publication Publication Date Title
CN103022978B (en) For the over under-voltage protection circuit of multiple pulse rectification circuit
CN102074994B (en) Charging device of direct-current (DC) system
CN102914725B (en) Medium-voltage power distribution network fault monitoring device
CN201523210U (en) Spontaneous power supply protecting device based on dynamic power supply path management technology
CN204179731U (en) Support the distribution line on-line monitoring acquisition terminal of circuit automatic electricity getting
CN204068380U (en) A kind of mobile AC emergency power supply unit
CN104158518A (en) Self energy taking power supply device
CN204131204U (en) Intelligent direct current power shields
CN203056535U (en) Passive microcomputer protection device
CN205123368U (en) Portable emergent direct current charging device
CN203707585U (en) High-voltage switchgear
CN202041612U (en) Automatic locating device for earth faults of electricity transmission lines
CN108695889B (en) High-efficient photovoltaic inverter capable of sharing operation and maintenance
CN204794055U (en) Zero disconnected open phase protection of low pressure power supply system
CN203119587U (en) Voltage-reducing chopper three-segment charger
CN202978436U (en) Remote automatic control system applied to distribution circuit
CN202721433U (en) Leakage protection and power supply recovery apparatus
CN202634288U (en) Novel frequency converter
CN201937311U (en) Full-automatic uniterruptable power output (UPS)
CN203387170U (en) Self-powered protector
CN201708523U (en) Electronically-controlled protection device
CN204669079U (en) A kind of safety control for resident's distribution
CN103094979A (en) Standby power for electric system direct current grounding line checking
CN104065043A (en) Battery under-voltage protection and display circuit
CN203574349U (en) Vehicle power supply security control device

Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CP03 Change of name, title or address

Address after: 325604 Liushi City, Yueqing province Xinguang Industrial Zone

Patentee after: NAHO ELECTRIC POWER TECHNOLOGY CO., LTD.

Address before: 325604 CHINT Road, Xinguang Industrial Zone, Liushi Town, Yueqing, Zhejiang, Wenzhou, Zhejiang

Patentee before: Zhejiang Nanrui Electric Power Automation Co.,Ltd.

C56 Change in the name or address of the patentee

Owner name: NANHONG ELECTRIC TECHNOLOGY CO., LTD.

Free format text: FORMER NAME: ZHEJIANG NANRUI ELECTRIC POWER AUTOMATION CO., LTD.