CN201327996Y - Microcomputer protection device and system - Google Patents
Microcomputer protection device and system Download PDFInfo
- Publication number
- CN201327996Y CN201327996Y CNU2008201238036U CN200820123803U CN201327996Y CN 201327996 Y CN201327996 Y CN 201327996Y CN U2008201238036 U CNU2008201238036 U CN U2008201238036U CN 200820123803 U CN200820123803 U CN 200820123803U CN 201327996 Y CN201327996 Y CN 201327996Y
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- module
- microprocessor
- input
- microcomputer protecting
- protecting device
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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Abstract
A microcomputer protection device comprises a machine body, a microprocessor module and an input/output interface module, wherein, the microprocessor module is arranged in the machine body; and the input/output interface module are coupled with the microprocessor module. The device further comprises a communication interface module and a photoelectric isolation circuit, wherein, the communication interface module is in communication connection with the microprocessor module and communicates with other equipment through a communication bus; and the photoelectric isolation circuit used for conduct electric isolation between external signals and the microprocessor is coupled between the microprocessor module, the input/output interface module. The utility model further comprises a microcomputer protection system which comprises a plurality of microcomputer protection devices and a master computer. Each microcomputer protection device communicates with the master computer through the communication bus. The protection devices and the system provided by the utility model can disperse monitor and protection for being finished in situ, and is connected only by communication cables, thereby avoiding the potential safety hazards caused by measuring, controlling, protection and signal wires which are all led to a main control room, simplifying secondary wiring, saving wiring cost, and improving the reliability and the serviceability of the system.
Description
Technical field
The utility model relates to the protective device of electric power system, particularly relate to a kind of in, the microcomputer protecting device of low pressure power transmission and transformation electricity or electric device.
Background technology
Along with improvement of computer science, the arithmetic speed and the precision of processor improve constantly, and cost constantly lowers, and this makes that the protective circuit that originally is made of discrete component in the electric power system is replaced by Microcomputer Protection gradually.Usually, microcomputer protecting device comprise switching value and analog quantity input/output interface and with these interface microprocessor linked.Processor obtains signal to be detected by input interface and carries out computing and the operation conditions of electric power system is judged according to the program of establishment in advance; and according to judged result; when detecting the device operation irregularity of electric power system; by output interface output control signal corresponding, provide protection to tested device.Because the running status judgement for tested device is realized by software; therefore; can improve the performance of protective device by better CPU of serviceability and better algorithm, and can realize adaptability widely by the parameter of adjusting software easily according to the difference of tested device.That can realize measuring, control and protect is integrated.
But existing microcomputer protecting device also has its deficiency in actual use.For example when a plurality of equipment need be monitored, in fact, most commercial Application situations all belonged to this type of, and the secondary stube cable of large amount of complex concentrates in the switchgear house, and its loose contact is to cause one of major reason of switchgear house generation serious accident.Therefore, be necessary to improve central controlled mode, reduce secondary connection.
Simultaneously, existing microcomputer protecting device also exists anti-electromagnetic interference capability poor, problems such as operation inconvenience.
Summary of the invention
The purpose of this utility model promptly is to provide a kind of microcomputer protecting device that can be used for distributed system, to overcome the problems referred to above of prior art, realizes the High Accuracy Control of monitor protective system, installation flexibly, and reduces complicated distribution.
For reaching this purpose, the utility model provides a kind of microcomputer protecting device, comprise cabinet, the microprocessor module that is placed in one and the input that is coupled with microprocessor module, output interface module, described device also comprises: communication interface modules, itself and described microprocessor module communicate to connect, and communicate by communication bus and miscellaneous equipment; Photoelectric isolating circuit, it is coupled between described microprocessor module and described input, the output interface module, is used to carry out the electrical isolation between external signal and the microprocessor.
Simultaneously, the utility model also provides a kind of microcomputer protection system, it comprises a plurality of microcomputer protecting devices and a main frame, each microcomputer protecting device communicates by communication bus and described main frame, wherein, each microcomputer protecting device comprises: input, output interface module, and it is used for the signal of telecommunication of protected equipment is detected and according to microprocessor control signal protected equipment controlled; Photoelectric isolating circuit, it is coupled between described input, output interface module and the microprocessor module, is used to carry out the electrical isolation between external signal and the microprocessor; Microprocessor module, it is to handling from the input signal of input, output interface module, and produces corresponding output signal and give described input, output interface module, and by communication interface modules and described main-machine communication; Communication interface modules, itself and described microprocessor module communicate to connect, and communicate by communication bus and main frame.
The beneficial effects of the utility model are: use this new protective device and system; monitoring and protection can be distributed on the spot and finish; only connect by communication cable; avoided in the prior art whole potential safety hazards that insert master-control room and bring such as all measurements, control, protection, holding wire; greatly simplified secondary connection; save wiring cost and improved the reliability and the ease for maintenance of system, reduced potential safety hazard.
Description of drawings
Fig. 1 is the circuit module schematic diagram of the utility model microcomputer protecting device embodiment one;
Fig. 2 is the construction module schematic diagram of the utility model microcomputer protecting device embodiment two.
Embodiment
Microcomputer protecting device of the present utility model comprises cabinet and circuit part, below will be respectively be elaborated from the formation angle of machinery and circuit part.Wherein the circuit structure of an embodiment as shown in Figure 1, as seen from the figure, it comprises: microprocessor module, input, output interface module, communication interface modules and photoelectric isolating circuit.
Wherein, for convenience of description, be example as motor protecting device with the utility model, be noted that the utility model also can be used as the monitoring and the protection of electric equipments such as small generator, transformer by suitable setting relevant parameters.The execution mode that specification exemplified is just for the ease of this novel technical scheme is illustrated, when not limiting its protection range with this.
Wherein, described input/output interface module generally include mutual inductance input unit that the electric current and the voltage of protected equipment such as motor are sampled and to its relay output unit of controlling and carry out numeral and or/signal element of analog communication signal I/O.
Photoelectric isolating circuit, be coupled between described microprocessor module and described input, the output interface module, be used to carry out the electrical isolation between external signal and the microprocessor, preferably, photoelectric isolating circuit is included in the input isolation circuit that is provided with between the input interface of mutual inductance input unit and microprocessor module and is located at the output interface of microprocessor module and the output isolation circuit between the relay output unit.Wherein, the mutual inductance input unit can realize that photoelectric isolating circuit is then realized Signal Spacing by optic coupling element by the voltage transformer summation current transformer of some.
General to the alternating current-direct current signal in order to realize switching value input, switching value output, described input isolation circuit preferably uses bi-directional light electric coupling chip to realize, and the RC filter circuit of connecting.Obtain its amplitude information and carry out Filtering Processing thereby corresponding signal is carried out " delivery ", thus the scope of application of aggrandizement apparatus.
Here microprocessor module comprises microprocessor, the power circuit and the microprocessor correspondent peripheral circuit of giving microprocessor power supply.For example, be convenient to commercial Application for making this protective device, power circuit preferably possesses 220V AC power frequency (50Hz) input is converted to the voltage output that starts from respective microprocessor work.This microprocessor then can be realized by the element that single-chip microcomputer, CPLD or DSP etc. have a data processing function, in the present embodiment, preferably with DSP as microprocessor, to make full use of its data processing function.Described peripheral circuit then comprises for example memory, A/D (D/A) change-over circuit, output latch circuit etc.
Communication interface modules and described microprocessor module communicate to connect, and communicate by communication bus and miscellaneous equipment; For example, described communication interface modules is support RS-485 bus communication, and is connected to miscellaneous equipment by twisted-pair feeder.So so that a plurality of protective devices install near transferring to primary equipment with distributed form.Certainly, described communication interface modules also can use other wired or wireless communication protocol forms.And connect different buses.For example, described communication interface circuit is supported ethernet communication protocol and is connected with miscellaneous equipment by optical fiber; Or support, and communicate by wireless mode and miscellaneous equipment as wireless communication protocols such as bluetooths.
According to the difference of application target, each protective device optionally disposes and shows and human-computer interaction module.For example, when the microcomputer protecting device unit uses, described microcomputer protecting device also comprises usually: a LCD MODULE, and it is connected with described microprocessor module, is used for showing the operating state of protected object and/or shows at the parameter setting up procedure of microcomputer protecting device; And a human-computer interaction module, it is connected with described microprocessor module, is used to carry out the parameter setting of microcomputer protecting device.
Wherein, described LCD MODULE comprises a LCDs and display control circuit, and its real form can be any way of prior art, exports the function that shows as long as can provide according to the displaying contents of microprocessor.The combination of one or more in the then available keyboard of described human-computer interaction module, mouse, the microphone is as input interface.Consider the applied environment that it is actual, optimal way is for realizing man-machine interaction by a rotation mouse.Described rotation mouse is a kind of device of realizing similar mouse function by knob, described rotation mouse has a rotating disk and an ACK button, and the mouse circuit that is attached thereto, rotate described rotating disk screen cursor is switched between the different options of the menu bar that shows in described LCD MODULE, press ACK button and then carry out the option of choosing.Described ACK button can be single button, also can be as existing mouse, left button and right button to be set, and execution corresponding function, it realizes the similar existing mouse of principle, and advantage is to be integrated on the panel, thereby avoid existing mouse to need to move freely and to need backing plate to carry out cursor positioning the deficiency that requisite space is big and inconvenience is integrated.
When the actual enforcement of foregoing circuit structure, microprocessor module and communication interface modules can be integrated on one the one PCB (printed circuit board (PCB)) plate, described input, output interface module and described photoelectric isolating circuit are integrated in one or two pcb board, and described each pcb board is fixed in the described cabinet in removable mode.As mutual inductance input unit and input isolation circuit are integrated on one second pcb board, and described relay output unit and described output isolation circuit are integrated on the tertiary circuit plate, wherein, described second, third circuit board can also be realized by a circuit board, connected with data wire between each circuit board.Thereby be convenient to the isolation of forceful electric power and light current.
Described LCD MODULE and described human-computer interaction module then can be encapsulated as the independent structure with second housing, and be connected in removable mode between this second housing and the described cabinet, communicate by telecommunication cable between described independent structure and the described microprocessor module and be connected.Such advantage is that the visual actual needs of user is selected to adopt or do not adopted and shows and man-machine interaction; And be that itself and cabinet are installed in same position or installation respectively.For example, when the installing space of switch panel is well-to-do, can use " integral type " to install, be about to described second housing and cabinet and together install, and have in limited time, then demonstration can be separated installation with apparatus main body in the space, only connect, thereby make combination more flexible by communication bus.
From the mechanical mechanism angle, microprocessor module of the present utility model, input, output interface module, communication interface modules and photoelectric isolating circuit all are arranged within the cabinet.For having good anti-electromagnetic interference (EMI) ability, cabinet is preferably the totally-enclosed structure that metal material is made, aluminium alloy for example, and it comprises protecgulum, bonnet and integrated casing, forward and backward lid and casing link together in removable mode, for example fix by screw.And described box inside forms the groove that is arranged in parallel, with the fixing usefulness of power circuit board.And in order to adapt to the circuit board of different size, as 2 layers, 4 layers, 6 laminates, described groove can be designed to have different in width.Above-mentioned each pcb board promptly is slidedly arranged in the described groove, and is fixed in the screw of recess edge by screw, and such design makes that the dismounting of circuit board is all very convenient, is convenient to element replacement.
According to microprocessor module program stored in advance; it can have following one or several or repertoire, for example: functions such as measurement of electric parameter, nothing time-delay fast tripping protection, negative phase-sequence overcurrent (uneven, the phase failure or anti-phase) protection, zero sequence overcurrent (ground connection) protection, underloading protection, under-voltage protection, overvoltage protection, rotation-clogging protection, fire-proof motor Te guardtime, long protection start-up time, self-starting control, PT break alarm.According to different environments for use, can select different function combinations.
Among the embodiment as shown in Figure 2, input/output interface module connects the analog quantity input: three-phase voltage U A, UB, UC and zero sequence UN input and electric current I A, IB, IC, I0, the switching value input: the operation of motor forward, inverted running, out of service and switch position signal, and 4 relay outputs are connected respectively to tripping operation, combined floodgate, report to the police and switch outlet.Communication interface modules is communicated by letter with miscellaneous equipment by pin 485A, 485B, 485D for supporting RS-485.
Simultaneously, according to this novel embodiment, a plurality of above-mentioned microcomputer protecting devices can be used for constituting microcomputer protection system jointly with a main frame.Each microcomputer protecting device communicates by communication bus and described main frame, wherein, each microcomputer protecting device comprises: input, output interface module, and it is used for the signal of telecommunication of protected equipment is detected and according to microprocessor control signal protected equipment controlled; Photoelectric isolating circuit, it is coupled between described input, output interface module and the microprocessor module, is used to carry out the electrical isolation between external signal and the microprocessor; Microprocessor module, it is to handling from the input signal of input, output interface module, and produces corresponding output signal and give described input, output interface module, and by communication interface modules and described main-machine communication; Communication interface modules, itself and described microprocessor module communicate to connect, and communicate by communication bus and main frame.
The microprocessor module of each microcomputer protecting device then can be written into different programs according to its needs, so that it has corresponding monitoring, protection or controlled function.A kind of preferred implementation is that each microcomputer protecting device uses identical hardware configuration, is only distinguished on software.Can increase the interchangeability of system's each several part like this, only need additional redundancy to purchase less hardware equipment, in time change in the time of can breaking down in any part of system and repair.
In addition, the main advantage of this system is to be and can to carry out little cabinet design according to each functional unit, Install near device transferred to primary equipment, with only connecting with the communications cable between the main frame, so consist of Distributed system can make monitoring and protection finish on the spot, has avoided in the prior art all measurements, control Whole potential safety hazards that insert master-control room and bring such as system, protection, holding wire have greatly been simplified secondary and have been connect Line has been saved wiring cost and has been improved reliability and the ease for maintenance of system, has reduced accident potential.
Claims (9)
1, a kind of microcomputer protecting device comprises cabinet, the microprocessor module that is placed in one and the input that is coupled with microprocessor module, output interface module, it is characterized in that described device also comprises:
Communication interface modules, itself and described microprocessor module communicate to connect, and communicate by communication bus and miscellaneous equipment;
Photoelectric isolating circuit, it is coupled between described microprocessor module and described input, the output interface module, is used to carry out the electrical isolation between external signal and the microprocessor.
2, microcomputer protecting device according to claim 1 is characterized in that, described photoelectric isolating circuit comprises bi-directional light electric coupling chip, to realize AC/DC universal.
3, microcomputer protecting device according to claim 1 is characterized in that, described communication interface modules is for supporting the RS-485 bus communication.
4, microcomputer protecting device according to claim 1 is characterized in that, described device also comprises:
One LCD MODULE, it is connected with described microprocessor module, is used for showing the operating state of protected object and/or shows at the parameter setting up procedure of microcomputer protecting device;
One human-computer interaction module, it is connected with described microprocessor module, is used to carry out the parameter setting of microcomputer protecting device.
5, microcomputer protecting device according to claim 4; it is characterized in that; described LCD MODULE and described human-computer interaction module are encapsulated as the independent structure with second housing; and be connected in removable mode between this second housing and the described cabinet, communicate by telecommunication cable between described independent structure and the described microprocessor module and be connected.
6, microcomputer protecting device according to claim 4; it is characterized in that; described human-computer interaction module comprises a rotation mouse; described rotation mouse has a rotating disk and an ACK button; and the mouse circuit that is attached thereto, rotate between the different options of described rotating disk and switch with the menu bar that shows in described LCD MODULE.
7, according to claim 1 or 2 or 3 or 4 described microcomputer protecting devices; it is characterized in that described cabinet is the totally-enclosed structure that metal material is made, comprise protecgulum, bonnet and integrated casing; and described box inside forms the groove that is arranged in parallel, and fixes with power circuit board.
8, microcomputer protecting device according to claim 1; it is characterized in that; described microprocessor module and communication interface modules are integrated in one first pcb board; described input, output interface module and described photoelectric isolating circuit are integrated in one or two pcb board, and described each pcb board is fixed in the described cabinet in removable mode.
9, a kind of microcomputer protection system is characterized in that, comprises a plurality of microcomputer protecting devices and a main frame, and each microcomputer protecting device communicates by communication bus and described main frame, and wherein, each microcomputer protecting device comprises:
Input, output interface module, it is used for the signal of telecommunication of protected equipment is detected and according to microprocessor control signal protected equipment controlled;
Photoelectric isolating circuit, it is coupled between described input, output interface module and the microprocessor module, is used to carry out the electrical isolation between external signal and the microprocessor;
Microprocessor module, it is to handling from the input signal of input, output interface module, and produces corresponding output signal and give described input, output interface module, and by communication interface modules and described main-machine communication;
Communication interface modules, itself and described microprocessor module communicate to connect, and communicate by communication bus and main frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201238036U CN201327996Y (en) | 2008-11-14 | 2008-11-14 | Microcomputer protection device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201238036U CN201327996Y (en) | 2008-11-14 | 2008-11-14 | Microcomputer protection device and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201327996Y true CN201327996Y (en) | 2009-10-14 |
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ID=41179956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201238036U Expired - Fee Related CN201327996Y (en) | 2008-11-14 | 2008-11-14 | Microcomputer protection device and system |
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| Country | Link |
|---|---|
| CN (1) | CN201327996Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103279056A (en) * | 2013-04-02 | 2013-09-04 | 瑞安市工泰电器有限公司 | Electric power intelligent measuring and control device |
| CN105511364A (en) * | 2016-01-27 | 2016-04-20 | 大庆参勃电器有限公司 | Combination motor parameter collection and control device |
| CN113300244A (en) * | 2021-06-15 | 2021-08-24 | 新兴铸管股份有限公司 | Protection device for protecting various microcomputers |
-
2008
- 2008-11-14 CN CNU2008201238036U patent/CN201327996Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103279056A (en) * | 2013-04-02 | 2013-09-04 | 瑞安市工泰电器有限公司 | Electric power intelligent measuring and control device |
| CN103279056B (en) * | 2013-04-02 | 2016-07-13 | 瑞安市工泰电器有限公司 | Electric intelligent measure and control device |
| CN105511364A (en) * | 2016-01-27 | 2016-04-20 | 大庆参勃电器有限公司 | Combination motor parameter collection and control device |
| CN105511364B (en) * | 2016-01-27 | 2018-01-23 | 大庆参勃电器有限公司 | Combination motor parameter acquisition control device |
| CN113300244A (en) * | 2021-06-15 | 2021-08-24 | 新兴铸管股份有限公司 | Protection device for protecting various microcomputers |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20091014 Termination date: 20131114 |