CN201278463Y - Digital bus connection protection apparatus - Google Patents
Digital bus connection protection apparatus Download PDFInfo
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- CN201278463Y CN201278463Y CNU2008201360625U CN200820136062U CN201278463Y CN 201278463 Y CN201278463 Y CN 201278463Y CN U2008201360625 U CNU2008201360625 U CN U2008201360625U CN 200820136062 U CN200820136062 U CN 200820136062U CN 201278463 Y CN201278463 Y CN 201278463Y
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Abstract
The utility model relates to a digital bus connection protection device belonging to the technical field of the high-voltage bus connection protection. The utility model aims at providing a device which modularizes and standardizes all functional units and integrates the functional units on a case body in a pluggable way so that the functional units are free from mutual interference and the working process of the functional units can be displayed. The functional units including a single chip microcomputer, a DI input unit, an AD sampling unit, a DO output unit, a communication unit, a human-computer interface unit and a power supply circuit unit are all modularized to be integrated, wherein the DI output unit, the AD sampling unit, the DO output unit, the communication unit, the human-computer interface unit and the power supply circuit unit are fixed on the backplane of the case body in a modularized and integrated way; and the human-computer interface unit is fixed on the front panel of the case body in a modularized and integrated way. The utility model can realize charging protection, overcurrent protection and malfunction start-up protection and fulfill synchronous closing function.
Description
Technical field
The utility model relates to a kind of digital female connection protective device, and this device is protection and the monitoring integrated apparatus that aims at the busbar sectional izing switch design of 10kV-110kV electric pressure, belongs to the female connection of high pressure resist technology field.
Background technology
Comprehensive automation of electric power system has been the direction of power network development; the development of microelectronic element makes protection and the monitoring possibility that combined together; can improve its reliability and operation and management level; but use microcomputer that many unfavorable factors are also arranged in transformer station; the for example interference of high-voltage electromagnetic field; strong vibration is arranged during the transformer substation switch operation; the deterioration of installation environment has proposed vibrationproof to Microcomputer Protection on the spot; wide temperature range; low-power consumption; anti-interference; high sensitivity; high accuracy; functional reliability; installation and maintenance conveniently wait higher requirement, and these difficult problems all are not resolved in existing microcomputer protecting device.
The utility model content
In order to overcome the problem that prior art exists; problem to be solved in the utility model is: a kind of digital female connection protective device is provided; all modularization and standardization are integrated on the casing in the mode of plug-in unit with all functions unit; interference-free mutually between each plug-in unit; entire work process can show, make whole device highly sensitive, precision is high, functional reliability is high, installation and maintenance are convenient.
In order to address the above problem, the scheme that the utility model adopts is: digital female connection protective device, single-chip microcomputer leaves into unit, AD sampling unit, DO with DI respectively by lead and leaves the unit, communication unit, human and machine interface unit and power circuit unit link to each other, and DO leaves the unit and links to each other with the power circuit unit by lead; Described single-chip microcomputer, DI open and leave unit, communication unit, human and machine interface unit and power circuit unit into unit, AD sampling unit, DO to be modularization integrated, DI opens unit, AD sampling unit, DO and leaves unit, communication unit and power circuit unit all by on the integrated backboard that is fixed on casing of modularization, and human and machine interface unit is by on the integrated front panel that is fixed on casing of modularization.
Be disposed with logic and tripping operation plug-in unit, power supply module, signal module, breaker tripping and closing outlet module, communication interface module, CPU module, interchange inputting modular unit on the backboard from left to right.
The left side of front panel middle and upper part is provided with liquid crystal display screen, the right side of liquid crystal display screen is provided with indicator light, the below of liquid crystal display screen is provided with action button, the lower right side of action button is provided with serial line interface, and the below of action button is provided with debugging safe brace, ground connection branch/close handle and operational mode diverter switch from left to right.
Single-chip microcomputer is made up of CPU module and peripheral circuit, and CPU module is realized the charge protection that time-delay is withdrawed from, overcurrent protection, malfunctioning startup protection and asynchronous switch-on function.
The digital female connection protective device of the utility model compared with prior art has following beneficial effect:
The all functions unit of this device all modularization and standardization is integrated on the casing in the mode of plug-in unit, have only inner 5V and the 24V electric pressure loop line that uses on the casing, strong and weak electricity separates fully, can significantly reduce the coupling of external electromagnetic interference in weak-feedback side of transmission line, strengthen the antijamming capability of this device, improved its reliability and fail safe.Make this device on functional configuration, have very strong flexibility, can change or increase part module, expand or change the function of this device according to user's request; This device can be realized charge protection, overcurrent protection, malfunctioning startup protection and asynchronous switch-on function.
Description of drawings
Below in conjunction with accompanying drawing the digital female connection protective device of the utility model is described further:
Fig. 1 is the system block diagram of the digital female connection protective device of the utility model;
Fig. 2 is the hardware configuration schematic diagram of the digital female connection protective device of the utility model;
Fig. 3 is the structural representation of digital female connection protective device backboard 12 shown in Figure 2.
Wherein, the 1-single-chip microcomputer, 2-DI opens into the unit, the 3-AD sampling unit, 4-DO leaves the unit, the 5-communication unit, the 6-human and machine interface unit, 7-power circuit unit, the female connection of 8-, the 9-relay, the 10-signal picker, the 11-casing, the 12-backboard, the 13-front panel, the 14-liquid crystal display screen, the 15-indicator light, 16-action button 16, the 17-serial line interface, 18-debugs safe brace, 19-ground connection branch/close handle, 20-operational mode diverter switch, 21-logic and tripping operation plug-in unit, 22-power supply module, 23-signal module, 24-breaker tripping and closing outlet module, 25-communication interface module, the 26-CPU module, 27-exchanges inputting modular unit.
Embodiment
As shown in Figure 1: digital female connection protective device; single-chip microcomputer 1 leaves into unit 2, AD sampling unit 3, DO with DI respectively by lead and leaves unit 4; communication unit 5; human and machine interface unit 6 links to each other with power circuit unit 7; DO leaves unit 4 and links to each other with power circuit unit 7 by lead; the signal picker 10 of AD sampling unit 3 is gathered the electric current and the voltage data of female connection 8, and DO leaves unit 4 and links to each other with the relay 9 that mother joins on 8.Single-chip microcomputer 1 is made up of CPU module 26 and peripheral circuit, and CPU module 26 is realized the charge protection that time-delay is withdrawed from, overcurrent protection, malfunctioning startup protection and asynchronous switch-on function.
After single-chip microcomputer 1 obtains the digital signal of sampling; carry out the amplitude information of digital filtering and algorithm computing acquisition analog quantity; respectively through the logic determines of protection software module, show to handle, links such as report storage, record ripple, after satisfying the protection operation condition, send orders such as tripping operation, signal to outlet loop.Because the space that single-chip microcomputer 1 inner nothing is deposited program, defence program is to leave among the flash memory FLASH, and single-chip microcomputer 1 comes the fetch program order by bus and carries out.Main program is a manager in software, is responsible for the module of difference in functionality is organized together.Initialization in the main program mainly is that whole system is that operate as normal is ready, and for the main transformer protection device, main program mainly comprises: CPU initialization and to the necessary parameter default settings.Main program entered operating state after initialization was finished, and showed on the liquid crystal display screen at first to judge whether relevant menu to carry out fixed value adjusting work, then changed the fixed value adjusting module if desired over to, otherwise continued to carry out downwards.Gathering switching value and detecting in the keyboard link, if detect the switching value displacement or a button is pressed, then send information and change message processing module over to and handle by main program, the result of information processing is sent to and shows that print module shows, prints, otherwise program continues to carry out signals collecting and computing module downwards.Whether needs move logic judgment module according to the relevant condition judgment with other of the calculated value of voltage power-less.After logic judgment module produces action command, whether move by the checkout gear exit relay, and the state that detects measured equipment judges whether action command obtains correct execution, if correct execution then change next time circulation over to, handle otherwise this abnormal information is sent to message processing module, again the result is given the demonstration output module.After the electrification reset, at first CPU and peripheral chip thereof are carried out initialization, next the state of a control of initialization simultaneously shows main menu, adopts inquiry mode to handle keyboard at last and communicates by letter with the A/D conversion and with intelligent object, obtains information.Communicate by letter with host computer and to adopt the interruption form, and interrupt levels is made as the highest.The input of switching value is taked to produce earlier to interrupt, the method for back inquiry.
DI opens into unit 2 to from the opening into amount of external connector, after opening entry loop photoelectricity and isolating, to single-chip microcomputer 1 input, judges anti-interference process through software logic through tri-state gate circuit, obtains and opens into the amount signal.The 24V signal power source that external switch amount (idle contact) taking device provides, through the resistance current limliting, be input to the input of optical isolator, the output of optical isolator is taken inner 5V power supply, be linked into 8 road triple gate devices, read " 0 " or the one state of signal by CPU through bus, to differentiate the switching situation of external connector.Adopting optical isolator that the outside is opened into power supply and inner 5V power supply does not have direct electrical link, has effectively eliminated the influence of external electromagnetic interference to the CPU internal circuit, improved reliability.
DO leaves unit 4 and carries out the outlet action command that is sent by CPU, and through the input circuit of AND circuit to optical isolator, the output of optical isolator drives the actuating of relay through unilateral diode.The importation of optical isolator is the inner 5V power supply of CPU, and output is the 24V power supply, in order to drive the 24V relay.By optical isolator CPU internal circuit and relay drive circuit are isolated, effectively prevented electromagnetic interference, improved the reliability of hardware circuit.For guaranteeing the reliability of outlet loop, adopted multinomial locking measure.As adopt the open outlet of starting component positive supply, adopt hardware watchdog locking outlet etc.When single-chip microcomputer 1 sends the outlet order, must send the unlocking signal, drive starting relay simultaneously and can drive exit relay, send trip signal.
Fig. 2 and shown in Figure 3, single-chip microcomputer 1, DI leave and leave unit 4, communication unit 5, human and machine interface unit 6 and power circuit unit 7 into unit 2, AD sampling unit 3, DO to be modularization integrated, DI opens unit 2, AD sampling unit 3, DO and leaves unit 4, communication unit 5 and power circuit unit 7 all by on the integrated backboard 12 that is fixed on casing 11 of modularization, and human and machine interface unit 6 is by on the integrated front panel 13 that is fixed on casing 11 of modularization.The left side of front panel 13 middle and upper parts is provided with liquid crystal display screen 14, the right side of liquid crystal display screen 14 is provided with indicator light 15, the below of liquid product screen 14 is provided with action button 16, the lower right side of action button 16 is provided with serial line interface 17, and the below of action button 16 is provided with debugging safe brace 18, ground connection branch/close handle 19 and operational mode diverter switch 20 from left to right.
The circuit design of human and machine interface unit 6 is mainly considered the convenience of the man-machine interaction of asking interlayer equipment, can follow simultaneously tradition operation idea again, design the Chinesizing Liquid Crystal Module, numerous signal lamps, succinctly conductive rubber button easily is convenient to user's working service and operation.
Be disposed with logic and tripping operation plug-in unit 21, power supply module 22, signal module 23, breaker tripping and closing outlet module 24, communication interface module 25, CPU module 26 on the backboard 12 from left to right, exchange inputting modular unit 27.
Logic and tripping operation plug-in unit 21 are provided with the 1X01-1X24 binding post, amount to 24, specifically comprise: pressure is low forbids the input contact that trips, the input contact of the low quiescing of pressure, the input contact of the low No switching on of pressure, hand trip(ping) input contact, closing by hand input contact, control power supply input contact, hand is jumped the relay output contact, the outlet contact closes a floodgate, jump position relay output contact, the remote motion signal contact, the heavy movable contact in breaker closing position, the heavy movable contact in circuit breaker trip position, tripping operation outlet contact, close a relay tip, tripping operation inlet contact.
Power supply module 22 is provided with the 2X01-2X12 binding post, amounts to 12, the middle part is provided with+5V and+the 24V power supply, the right side, bottom is provided with mains switch.
Signal module 23 is provided with the 3X01-3X24 binding post, amounts to 24, wherein comprises two groups of guard signals, can be respectively as central signal and remote motion signal, and remote control is closed a floodgate and is exported contact, remote control tripping operation outlet contact, and the remote control spare contact.
Breaker tripping and closing outlet module 24 is provided with the 4X01-4X24 binding post; amount to 24; wherein comprise the input and output of controlling power supply; hand branch, the input of hand combined floodgate cutter; protection is closed a floodgate and to be closed a floodgate without pressure atresia combined floodgate access point, closing coil access point, pressure low No switching on, quiescing, to forbid the input of tripping, two groups of pressure atresia normal opened contacts through pressure atresia combined floodgate access point, protection.
Communication interface module 25 is provided with the 5X01-5X12 binding post, amounts to 12, and the bottom is provided with two Ethernet interfaces.
CPU module 26 is provided with the 6X01-6X22 binding post; amount to 22; comprise the charge protection input; position of the switch input, the input of hand indentured period open into, press again the overcurrent protection input open into; the breaker remote signal open into; realize the charge protection that time-delay is withdrawed from, overcurrent protection, malfunctioning startup protection and asynchronous switch-on function.Stream inputting modular unit 27 is provided with the 7X01-7X24 binding post; amount to 24; wherein the left side is provided with the 7X13-7X24 binding post; the right side is provided with the 7X01-7X12 binding post; comprising the three-phase input for protection CT, the input of zero-sequenceprotection CT, the input of measuring CT; the input of busbar voltage three-phase and zero line, the line voltage distribution input.
The utility model has adopted real-time sampling and calculating, the pattern that protection has entered exception handles after having adopted and having started again, the first, protection starting component: a〉three difference of phase currents starting components: when arbitrary difference of phase currents continuous three times when starting door, protection starts; B〉zero-sequence current surmounts the limit starting component: when zero-sequence current surmounted the definite value of starting component, protection started; C〉residual voltage surmounts the limit starting component: when residual voltage surmounted the definite value of limitting starting component, protection started.
Second; charge protection: a〉composite voltage locking overcurrent protection; be also referred to as alternate protection: the composite voltage blocking element is made up of low-voltage, negative sequence voltage, open and protection when arbitrary line voltage is lower than definite value or negative sequence voltage and is higher than definite value, and the composite voltage element can be thrown and move back.The three-phase type overcurrent is adopted in overcurrent protection, the relation of logic OR, and through the time-delay outlet, switch closes the back by a minute change and drops into automatically, withdraws from automatically through delaying time.B〉overcurrent protection of residual voltage locking zero sequence, be also referred to as ground protection:, start the protection of residual voltage blocking element when self-produced residual voltage during greater than zero sequence blocking voltage set point; When zero-sequence current during, start the protection of zero sequence overcurrent element greater than the current ration of zero sequence overcurrent.C〉logic of charge protection: when charged bus closes a floodgate charging to the aircraft carrier line; if the aircraft carrier line is by fault; for keeping system stability; need rapid tripping block switch; the charge protection comparison sensitivity of adjusting on the definite value more for this reason, it is extremely short to delay time, and differently on definite value protection occurs and cooperates; charge protection can only drop into when charging in short-term, withdraws from subsequently.
The 3rd, overcurrent protection: during the sectionalized bus paired running,, need selectable tripping block switch, be provided with syllogic for this reason and press off guarantor's expansion of lock overcurrent and syllogic zero-pressure locking overcurrent protection again as fault.
The 4th, malfunctioning startup protection: after the protection tripping operation outlet, through malfunctioning startup delay time, electric current moves in malfunctioning startup still greater than malfunctioning startup definite value, and former during this period protection tripping operation outlet is not regained.
The 5th, asynchronous switch-on: when two sections buses are connected to different system, might have the asynchronous switch-on requirement, for differentiating the same period, both sides voltage need be introduced this device, insert four groups of voltages: the three-phase of one section busbar voltage in the time of respectively, be used for rated output and voltage blocking, another group is a phase voltage of second section bus.Through comparing the difference in magnitude of both sides voltage; The phase difference of both sides voltage; The difference on the frequency of both sides and both sides frequency change are poor, and whether these less than set point, thereby are defined as the entry condition of asynchronous switch-on.
The 6th, secondary circuit self check: to broken string, imbalance (＜80%), the inverted sequence of CT secondary; Abnormal states such as the broken string of PT secondary, three-phase pressure loss, inverted sequence are monitored.
Control principle of the present utility model and circuit are connected to prior art.
Claims (3)
1, digital female connection protective device, single-chip microcomputer (1) leaves into unit (2), AD sampling unit (3), DO with DI respectively by lead and leaves unit (4), communication unit (5), human and machine interface unit (6) link to each other with power circuit unit (7), and DO leaves unit (4) and links to each other with power circuit unit (7) by lead; It is characterized in that: described single-chip microcomputer (1), DI open and leave unit (4), communication unit (5), human and machine interface unit (6) and power circuit unit (7) into unit (2), AD sampling unit (3), DO to be modularization integrated, DI opens unit (2), AD sampling unit (3), DO and leaves unit (4), communication unit (5) and power circuit unit (7) all by on the integrated backboard (12) that is fixed on casing (11) of modularization, and human and machine interface unit (6) is by on the integrated front panel (13) that is fixed on casing (11) of modularization.
2, digital female connection protective device according to claim 1 is characterized in that: be disposed with logic and tripping operation plug-in unit (21), power supply module (22), signal module (23), breaker tripping and closing outlet module (24), communication interface module (25), CPU module (26) on the backboard (12) from left to right, exchange inputting modular unit (27).
3, digital female connection protective device according to claim 1; it is characterized in that: the left side of front panel (13) middle and upper part is provided with liquid crystal display screen (14); the right side of liquid crystal display screen (14) is provided with indicator light (15); the below of liquid crystal display screen (14) is provided with action button (16); the lower right side of action button (16) is provided with serial line interface (17), and the below of action button (16) is provided with debugging safe brace (18), ground connection branch/close handle (19) and operational mode diverter switch (20) from left to right.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201360625U CN201278463Y (en) | 2008-09-27 | 2008-09-27 | Digital bus connection protection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201360625U CN201278463Y (en) | 2008-09-27 | 2008-09-27 | Digital bus connection protection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201278463Y true CN201278463Y (en) | 2009-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201360625U Expired - Fee Related CN201278463Y (en) | 2008-09-27 | 2008-09-27 | Digital bus connection protection apparatus |
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| CN (1) | CN201278463Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248016A (en) * | 2013-04-24 | 2013-08-14 | 南自晋能自动化有限公司 | Short-wave ultraviolet light bus protection device |
| CN103337834A (en) * | 2013-06-09 | 2013-10-02 | 常熟市九洲电器设备有限公司 | Overcurrent protection method for motor |
| CN105954626A (en) * | 2016-06-22 | 2016-09-21 | 国网山东省电力公司莱芜供电公司 | Portable microcomputer bus protection apparatus tester |
| CN107895930A (en) * | 2017-11-26 | 2018-04-10 | 湖北恒晶电气有限公司 | A kind of universal microcomputer protecting device of intelligent in-situ and its control method |
-
2008
- 2008-09-27 CN CNU2008201360625U patent/CN201278463Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248016A (en) * | 2013-04-24 | 2013-08-14 | 南自晋能自动化有限公司 | Short-wave ultraviolet light bus protection device |
| CN103337834A (en) * | 2013-06-09 | 2013-10-02 | 常熟市九洲电器设备有限公司 | Overcurrent protection method for motor |
| CN105954626A (en) * | 2016-06-22 | 2016-09-21 | 国网山东省电力公司莱芜供电公司 | Portable microcomputer bus protection apparatus tester |
| CN107895930A (en) * | 2017-11-26 | 2018-04-10 | 湖北恒晶电气有限公司 | A kind of universal microcomputer protecting device of intelligent in-situ and its control method |
| CN107895930B (en) * | 2017-11-26 | 2023-11-07 | 湖北恒晶电气有限公司 | Intelligent on-site general microcomputer protection device and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANXI NANZI JINNENG AUTOMATION CO., LTD. Free format text: FORMER NAME: SHANXI NANZI JINNENG AUTOMATION COMPLETE SET CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: North Street Center 030006 Shanxi city of Taiyuan province high tech Development Zone No. 3 Building 10 morning rain Patentee after: NANZI JINNENG AUTOMATION Co.,Ltd. Address before: North Street Center 030006 Shanxi city of Taiyuan province high tech Development Zone No. 3 Building 10 morning rain Patentee before: SHANXI NANZI JINNENG AUTOMATION Co.,Ltd. |
|
| CP03 | Change of name, title or address |
Address after: North Street Center 030006 Shanxi city of Taiyuan province high tech Development Zone No. 3 Building 10 morning rain Patentee after: SHANXI NANZI JINNENG AUTOMATION Co.,Ltd. Address before: 030006 Shanxi city of Taiyuan province high tech Zone Industrial Road No. 48 building two layer A New Island Technology Park Patentee before: Shanxi Nanzi Jinneng Automation Complete Set Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090722 Termination date: 20160927 |