CN201854085U - Bus coupler segmented monitoring protection and comprehensive self-automatic input device - Google Patents
Bus coupler segmented monitoring protection and comprehensive self-automatic input device Download PDFInfo
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- CN201854085U CN201854085U CN2010201951891U CN201020195189U CN201854085U CN 201854085 U CN201854085 U CN 201854085U CN 2010201951891 U CN2010201951891 U CN 2010201951891U CN 201020195189 U CN201020195189 U CN 201020195189U CN 201854085 U CN201854085 U CN 201854085U
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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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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Abstract
The utility model discloses a bus coupler segmented monitoring protection and a comprehensive self-automatic input device, comprising a remote monitoring center and a protection terminal which are connected with each other, wherein the protection terminal comprises a digital signal processor (DSP) part and a digital microprogrammed control unit (MCU) module which are connected with each other, the DSP part is respectively connected with an analog quantity input part, a digital quantity input interface part, and a switching value output part, and the digital MCU module is respectively connected with an external communication interface part and a man-machine conversation interface part. The bus coupler segmented monitoring protection and the comprehensive self-automatic input device disclosed by the utility model is designed based on a 32-bit high-performance DSP and a high-speed Ethernet communication technology, is mainly applied to bus coupler switches with the voltage grades of 110kV and below, and the functions of monitoring protection for the bus coupler switches (or a bridge switch) and comprehensive self-automatic input for the incoming lines of the bus coupler switches (or the bridge switch) are completed.
Description
Technical field
The utility model belongs to electric apparatus monitoring resist technology field, relates to a kind of monitoring and protecting device that is used for power transmission and transforming equipment, is specifically related to a kind of female connection segmentation monitoring and protection and comprehensive backup auto-activating device.
Background technology
In electric power system, relaying protection and automatics are the important tool that guarantees safe operation of power system and improve the quality of power supply.In the power system operation, owing to the defective and the ageing of insulation of the influence of wind, rain, thunder and lightning, equipment, operation maintenance is improper and reason such as operating mistake, various faults and abnormal working position may take place in the electric elements that cause forming electric power system.The fault that electric power system takes place mainly is various types of short circuits, comprises three-phase shortcircuit, line to line fault, two phase ground short circuit, single-line to ground fault, and the turn-to-turn short circuit of generator, the same phase winding of transformer.Common abnormal working position mainly is overload, system oscillation and frequency reduction etc.The harm of fault is:
(1) electric arc of fault point may burn out faulty equipment.
(2) equipment in the fault loop is because thermal effect and electrodynamic effect that short circuit current produces can wreck or damage.
(3) voltage of electric power system some areas descends significantly, influences user's ordinary production.
(4) destroy the stability of electric power system paired running, cause system oscillation, even whole system disintegrates, cause large-area power-cuts.
The probability that bus breaks down is low than circuit, but the influence surface of fault is very big.This is because be connected with more electric component usually on the bus; busbar fault will make these elements have a power failure; thereby cause large area blackout; and may destroy the stable operation of system; fault is further enlarged; as seen busbar fault is one of the most serious electric fault, therefore utilize the bus protection removing and dwindle the consequence that fault causes, and be very necessary.
Therefore; any electric power system must be considered contingent fault and abnormal working position in the system, and utilize protective relaying device to be eliminated when design and running; to guarantee that electric power system normally moves, relaying protection at present is based on microcomputer type relay protection.
Summary of the invention
The purpose of this utility model provides a kind of female connection segmentation monitoring and protection and comprehensive backup auto-activating device; this device is based on 32 High Performance DSP (digital signal processor) and Fast Ethernet ruton letter art designs; mainly be applicable to 110KV and following electric pressure bus connection switch, finish the comprehensive prepared auto restart function of monitoring and protection and female connection (or bridge switch) inlet wire of bus connection switch (or bridge switch).
The technical scheme that the utility model adopted is; a kind of female connection segmentation monitoring and protection and comprehensive backup auto-activating device; comprise the remote monitoring center and the protection terminal that are connected; the protection terminal comprises digital DSP parts and the digital MCU module that is connected; be connected with analog quantity input block, digital-quantity input interface parts, switching value output block respectively on the numeral DSP parts, be connected with external communication interface parts, man-machine dialogue interface parts on the digital MCU module respectively.
Feature of the present utility model also is,
Protection terminal wherein is provided with two or more.
Remote monitoring center wherein is used for the fault message of gathering system, and this fault message is analyzed and added up, and deposits data in database then, checks for administrative staff.
Protection terminal wherein, the running status that is used to gather current bus, and whether have fault, troubles inside the sample space whether according to the protection algorithm computation, and whether decision trips according to setting value.
The beneficial effects of the utility model are,
(1) scheme of MPU+DSP.Wherein MPU, DSP are available on demand a plurality of, and wherein MPU finishes total starting element and the man-machine interface and the background communication function of protective device, and DSP finishes all protection algorithm and logic function.Like this, defencive function is separated with other expanded functions, on the one hand DSP is absorbed in and finishes the protection algorithm, the complexity that reduces software design is to reduce unnecessary error; On the other hand, expanded function can be finished by the MPU that more is good at functions such as network service, man-machine interface, accomplishes to have his own strong points.Wherein, digital DSP parts adopt TMS320F2812, and digital MCU adopts LPC2131-32 position ARM chip.
(2) exchange switching part and comprise current exchanger TA and voltage interchanger TV, be used for converting secondary survey electric current, the voltage signal of the TA of system, TV to weak electric signal,, and play the strong and weak electricity buffer action for the CPU card conversion.CPU card has adopted multilayer printed board and surface mount process, compact.The device power supply adopts this plug-in unit of AC and DC two-way switch power supply to export one road 5V, one road 24V voltage.5V is used for the work of device digital device, and 24V is used for the relay driving and the quantity of state input is used.The RS485 bus network of technical grade, networking economy is convenient.The human-computer dialogue plug-in unit comprises that Chinese shows keyboard operation and signal lamp deixis.
Description of drawings
Fig. 1 is the structural representation of the utility model female connection segmentation monitoring and protection and comprehensive backup auto-activating device;
Fig. 2 is the structural representation of protection terminal in the utility model female connection segmentation monitoring and protection and the comprehensive backup auto-activating device;
Fig. 3 is the flow chart of front-end A in the utility model female connection segmentation monitoring and protection and the comprehensive backup auto-activating device/D sampling;
Fig. 4 is the circuit theory diagrams of switching value output block in the utility model female connection segmentation monitoring and protection and the comprehensive backup auto-activating device.
Among the figure, 1. analog quantity input block, 2. digital-quantity input interface parts, 3. digital DSP parts, 4. digital MCU module, 5. external communication interface parts, 6. man-machine dialogue interface parts, 7. switching value output block, 8. remote monitoring center, 9. protection terminal.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
The structure of the utility model female connection segmentation monitoring and protection and comprehensive backup auto-activating device; as shown in Figure 1; comprise the remote monitoring center 8 and the protection terminal 9 that are connected; protection terminal 9 is provided with a plurality of; the structure of protection terminal 9 as shown in Figure 2; comprise the digital DSP parts 3 and the digital MCU module 4 that are connected; be connected with analog quantity input block 1, digital-quantity input interface parts 2, switching value output block 7 respectively on the numeral DSP parts 3, be connected with external communication interface parts 5, man-machine dialogue interface parts 6 on the digital MCU module 4 respectively.Wherein,
Analog quantity input block 1; be used for the front end preliminary treatment and the quantification of input analog amount; pretreatment unit comprises that input conversion and voltage form part, low-pass filtering ALF, signal sampling S/H unit and digital-to-analogue conversion A/D unit; this A/D transformation result is sent into digital DSP parts 3; DSP utilizes the corresponding protection algorithm that these data are analyzed and calculated, and this result is passed to digital MCU module 4.The A/D sample circuit is selected the ADS8505 chip of TI company for use, and this chip is high performance SAR type A/D converter.Its inner capacitance matrix mode that adopts CMOS technology, power consumption is lower, and volume is less.A/D converter inside is provided with sampling holder usually, and this sampling holder can be kept sampled voltage up to EOC, and its switching rate is very fast.The ADS8505 chip has 16 bit resolutions, and sampling rate can reach 250KHz, and parallel 16 bit data output is fit to 8 and 16 bit data bus, adopts single 5V power supply power supply, and the standard input signal scope can reach positive and negative 10V, and overall power only is 70mW.This device need be controlled A/D converter, finishes the sampling of voltage and current signal and to the measurement of power frequency component frequency.Conventional method adopts CPU or single-chip microcomputer to finish controlling of sampling to A/D converter more, and its advantage is that programming is simple, control flexibly, but that shortcoming is a control cycle is long, speed is slow.For example MCS-51 series monolithic maximum clock frequency only is 12MHz, when the sample rate of A/D converter itself when very fast, the work schedule at a slow speed of CPU or single-chip microcomputer has greatly limited the high speed performance of A/D converter.And the clock frequency of DSP can reach more than the 100MHz, can control A/D converter flexibly and carry out high-speed sampling, and sampled data be deposited in real time among the RAM of DSP inside;
Digital-quantity input interface parts 2, be used for the isolation (adopting the TP521 optical coupler to isolate) of input digit amount, with this switching value input digit DSP parts 3, by DSP this data utilization protection algorithm is carried out analytical calculation, and this result is passed to digital MCU module 4;
External communication interface parts 5 are used for communicating by letter of native system and external system, are made up of with interface the communication interface and the system debug of system and outside host computer, comprise a RS485 interface and an Ethernet interface, can form network very easily.
Man-machine dialogue interface parts 6, be used to realize the interchange between man-machine, mainly partly form by keyboard portion, LCD display part and LED light, keyboard is used for inquiry and concrete parameter is set, LCD display adopts the very color display screen of 320*240, be used for Hanzify and show current working state and each parameter, LED light adopts highlighted LED, is used to indicate current working state.
Switching value output block 7 is used for the output control of switching value.
The workflow of the utility model female connection segmentation monitoring and protection and comprehensive backup auto-activating device is:
Analog quantity input block 1 is gathered forward direction input analog signal, through overvoltage formation part, low-pass filter circuit the high fdrequency component in the analog signal is filtered out, by sample circuit, A/D change-over circuit analog signal is quantized into digital signal for digital DSP parts 3 analytical calculations then; Digital-quantity input interface parts 2 are gathered forward direction input digit switching value signal, after isolating through optical coupling device, send into digital DSP parts 3 for the DSP analytical calculation.All protection algorithms of system and control logic are all realized by DSP, DSP is according to the protection algorithm computation, and utilize result of calculation and setting value relatively to judge whether to break down and interval internal fault whether, and output signal to switching value output block 7 according to fault type, the output switching value is exported to the amount of leaving relay through behind the photoelectric isolating device, DSP also sends into fault-signal digital MCU module 4, numeral MCU module 4 is responsible for the operational management of whole system, MCU is connected with man-machine dialogue interface parts 6 with external communication interface parts 5, and external communication interface parts 5 main responsible systems communicate by letter with host computer; Man-machine dialogue interface parts 6 comprise keyboard, display screen and indicator light, and keyboard is used to set parameters such as setting value, and display screen is used for the display system current state, and indicator light is used to indicate the work at present state.
Electric power system often is under the normal operation conditions.At this moment, protective device should not move.But owing to natural and artificial reason may cause fault.In case fault takes place, should be rapidly, selectively faulty equipment be excised from system by protective relaying device.Times be under the state of preparing for any eventuality so be installed in the protective relaying device overwhelming majority of system, for the GPF (General Protection False device, it when non-action state except measuring component the surveillance state, its logical gate is ready down.Whether logical circuit exists hidden danger to know.Only in regular check, could find.Undiscovered and the eliminating owing to there is hidden danger; can cause the malfunction of protection during fault, and this device utilizes software to detect the hardware circuit each several part of microcomputer protecting device in real time, in case find fault; fault alarm signal is sent in the outlet of locking immediately trip(ping) circuit simultaneously.For the stability and the anti-interference that improve system, this device has adopted following method:
1. the detection of external memory storage, adopt the sum check method, promptly all data additions, overflow the part no matter, only stay 32, be stored in other unit separately, during operation again the data addition of each unit, with original and relatively, if inconsistent then description code change or hardware error.
2. the detection of the amount of leaving circuit, the amount of leaving circuit can be divided into two classes: a class is to leave that power supply is alarmed, the amount of leaving of the contact locking of starting relay, for example various tripping operation exit relays; Another kind of is to leave the amount of leaving that power supply is not subjected to locking, for example starting relay, alarm relay etc.Fig. 4 is the amount of leaving an output circuit schematic diagram.Output line by the IO mouth among the figure drives double switch amount circuit.P1.1 is through 7400 NAND gate and P1.2 combination, in input through 7400 NAND gate circuit control photoelectric isolated chip, light every output drive triode, leave the normally closed contact AXJ of power supply 24V through alarm relay, light drives exit relay CKJ1 every, triode.Leave the contact QDJ control of power supply 24V ground warp starting relay, increased the reliability of circuit.
During normal the operation, the order of sending the locking digital output circuit by software by the IO mouth.Even P1.1=1, P1.2=0, P1.3=0, thus make two-way light every the input diode negative electrode be high level, light is every not conducting, the contact of exit relay all is failure to actuate.
Starting relay action behind line failure, the junction closure of QDJ.Through computed in software, and with the definite value of protection section relatively, be positioned at the protection zone as fault, then send trip signal.Even P1.1=0, P1.2=1, thus make first via light every the input diode negative electrode be low level, light is every conducting, the triode conducting, the 24V power supply is through the normally closed contact of alarm relay.Triode, isolating diode make exit relay CKJ1 action.Software is checked circuit breaker trip success back withdrawal trip signal.
Light among Fig. 4 is the self check feedback circuit of the amount of leaving circuit every U6.When microcomputer protecting device normally moved, software was split the output circuit at set intervals and is once checked.The method of checking is: send action command by the IO mouth, (P1.1=0, P1.2=1) is then from the incoming line reading state of IO mouth, when this position is low level, illustrate that digital output circuit is correct, otherwise the explanation digital output circuit there is open circuit conditions, report digital output circuit fault.As check correctly, then send the locking order again, (P1.1=1, P1.2=0), then from the incoming line reading state of IO mouth, when this position during for high level the explanation digital output circuit correct, otherwise illustrate that digital output circuit has short-circuit conditions, report the digital output circuit fault.
3. the software watchdog technology is provided with watchdog timer in the inside of CPU.The effect of watchdog timer normally moves system restoration when interference causes program fleet exactly.Watchdog timer is counted by certain frequency, produces when it overflows and interrupts, and arranges software reset's instruction in interruption, and program recovery is normally moved.When software programming, arranged clear operation in the major part of program to watchdog timer, and the assurance program when normally moving watchdog timer do not overflow.In case program fleet must can not carried out by normal order, certainly, also can't make the watchdog timer zero clearing.Like this, through an of short duration time-delay, watchdog timer overflows, and produces to interrupt, and makes program from beginning execution.
4. adopt the software filtering technology, adopted some software approach to eliminate and reduced the influence of disturbing protective device.In analog acquisition, be no more than △ χ according to the maximum differential of analyzing adjacent double sampling value, in program,,, should remove this sampled value if difference greater than △ χ, illustrates that sampled value is interfered with this sampled value and sampled value comparison last time.The collection of switch amount for preventing to disturb the erroneous judgement that causes, has been adopted the diagnostic method of continuous several times.
As shown in Figure 3, the A/D sampling adopts interrupt mode to realize, after A/D converts, the A/D chip sends interrupt signal to DSP, and DSP promptly responds this interruption, reads when the A/D of prepass transformation result and storage, the updated stored address, judge and work as whether prepass is last passage, if the channel number zero clearing is interrupted returning; Otherwise channel number adds one, and concurrent conversion command interrupts returning then.
Claims (2)
1. a mother joins segmentation monitoring and protection and comprehensive backup auto-activating device; it is characterized in that; comprise the remote monitoring center (8) and the protection terminal (9) that are connected; protection terminal (9) comprises digital DSP parts (3) and the digital MCU module (4) that is connected; be connected with analog quantity input block (1), digital-quantity input interface parts (2), switching value output block (7) on the described digital DSP parts (3) respectively, be connected with external communication interface parts (5), man-machine dialogue interface parts (6) on the described digital MCU module (4) respectively.
2. female connection segmentation monitoring and protection according to claim 1 and comprehensive backup auto-activating device is characterized in that described protection terminal (9) is provided with two or more.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201951891U CN201854085U (en) | 2010-05-19 | 2010-05-19 | Bus coupler segmented monitoring protection and comprehensive self-automatic input device |
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| CN2010201951891U CN201854085U (en) | 2010-05-19 | 2010-05-19 | Bus coupler segmented monitoring protection and comprehensive self-automatic input device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299564A (en) * | 2011-09-08 | 2011-12-28 | 天津理工大学 | Digital signal processor (DSP)-based quick high-voltage power supply switching system and control method thereof |
| CN103647352A (en) * | 2013-12-18 | 2014-03-19 | 中国西电电气股份有限公司 | Intelligent C-GIS online monitoring and protecting system |
-
2010
- 2010-05-19 CN CN2010201951891U patent/CN201854085U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299564A (en) * | 2011-09-08 | 2011-12-28 | 天津理工大学 | Digital signal processor (DSP)-based quick high-voltage power supply switching system and control method thereof |
| CN103647352A (en) * | 2013-12-18 | 2014-03-19 | 中国西电电气股份有限公司 | Intelligent C-GIS online monitoring and protecting system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG JIYUAN ELECTRIC AUTOMATION TECHNOLOGY CO. Free format text: FORMER OWNER: XI'AN ENGINEERING UNIV. Effective date: 20120606 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 710048 XI'AN, SHAANXI PROVINCE TO: 324100 QUZHOU, ZHEJIANG PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20120606 Address after: 324100 Zhejiang province Jiangshan City Road No. 198 Qing Hu Zhen Village intersection Patentee after: Zhejiang Sinoera Electric Power Automation Technology Co., Ltd. Address before: 710048 Shaanxi city of Xi'an Province Jinhua Road No. 19 Patentee before: Xi'an Engineering Univ. |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151228 Address after: Jiangshan City, Zhejiang province 324100 Quzhou City Road No. 198 Qing Hu Zhen Village intersection Patentee after: ZHEJIANG JIYUAN TRANSFORMER CO., LTD. Address before: 324100 Zhejiang province Jiangshan City Road No. 198 Qing Hu Zhen Village intersection Patentee before: Zhejiang Sinoera Electric Power Automation Technology Co., Ltd. |
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| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 324100 Zhejiang province Jiangshan City Qing Hu Zhen Village intersection 198-4 junctions Patentee after: Zhejiang era electrical Polytron Technologies Inc Address before: Jiangshan City, Zhejiang province 324100 Quzhou City Road No. 198 Qing Hu Zhen Village intersection Patentee before: ZHEJIANG JIYUAN TRANSFORMER CO., LTD. |
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| CX01 | Expiry of patent term |
Granted publication date: 20110601 |
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| CX01 | Expiry of patent term |