CN103248016A - Short-wave ultraviolet light bus protection device - Google Patents
Short-wave ultraviolet light bus protection device Download PDFInfo
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- CN103248016A CN103248016A CN2013101445900A CN201310144590A CN103248016A CN 103248016 A CN103248016 A CN 103248016A CN 2013101445900 A CN2013101445900 A CN 2013101445900A CN 201310144590 A CN201310144590 A CN 201310144590A CN 103248016 A CN103248016 A CN 103248016A
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Abstract
The invention discloses a short-wave ultraviolet light bus protection device, and belongs to the technical field of high-voltage bus protection; in order to solve the technical problem, the bus protection device which is high in sensitivity and accuracy and reliable in working is provided; and in order to solve the problem, the technical scheme adopted by the protection device is as follows: a short-wave ultraviolet light detection sensor is mounted on a bus arc light monitoring part for collecting short-wave ultraviolet, and is connected with a short-wave ultraviolet light bus protection main unit through an expansion control unit; a singlechip is connected with a short-wave ultraviolet light signal input unit, an AD sampling unit, an output control unit, a communication unit and a human-computer interface respectively; the short-wave ultraviolet light bus protection main unit is connected with the expansion control unit through the short-wave ultraviolet light signal input unit; the AD sampling unit is connected with a signal collection unit for collecting current signals of the bus; and an output end of the output control unit is connected with a bus breaker. The short-wave ultraviolet light bus protection device is applicable to power distribution systems such as transformer substations and the like.
Description
Technical field
Short wave ultraviolet light protection equipment for busbar of the present invention belongs to high voltage bus resist technology field, is specifically related to a kind of realization protective device that 35 KV and following substation bus bar faulty equipment are isolated that can be safely and fast.
Background technology
Middle voltage bus bar arc short-circuit fault is a kind of very serious fault in the distribution system, it tend to cause catastrophic consequence, the various fault electric arc effects that the huge energy that its internal arc burning discharges produces, seriously burn expensive switchgear, short-circuit current rush can damage main transformer, causes long-time power failure; Near staff's human casualty accident more seriously it also can cause.
Existing protective device is considered because of aspects such as failure criterion and selectivity; the design of excision or isolated fault is generally between 1 second to 2 seconds; and the design time of breaker cabinet tolerance arc fault is 0.1 second; so existing protective device all can not satisfy the requirement of quick excision fault or protection coverage; press for fast a kind of; economy and the strong novel middle voltage bus bar protection system of applicability; higher to solve the middle voltage bus bar probability that breaks down; postpone the excision fault and cause fault progression, expansion, thereby cause the problem of tremendous economic loss.
Summary of the invention
The present invention overcomes the deficiency that prior art exists, and technical problem to be solved is: provide a kind of highly sensitive, precision is high, the protection equipment for busbar of reliable operation.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: the short wave ultraviolet light protection equipment for busbar, comprise: a plurality of short wave ultraviolet light detecting sensors, a plurality of expansion control unit and short wave ultraviolet light bus protection master unit, described short wave ultraviolet light detecting sensor is installed in bus arc light monitoring position and gathers short wave ultraviolet, and the short wave ultraviolet light detecting sensor links to each other with short wave ultraviolet light bus protection master unit by the expansion control unit;
Described short wave ultraviolet light bus protection master unit comprises: single-chip microcomputer, short wave ultraviolet light signal input unit, AD sampling unit, output control unit, communication unit, human and machine interface unit and power circuit unit, described single-chip microcomputer links to each other with human and machine interface unit with short wave ultraviolet light signal input unit, AD sampling unit, output control unit, communication unit respectively, and above-mentioned power circuit unit is whole short wave ultraviolet light bus protection master unit power supply;
Described short wave ultraviolet light bus protection master unit links to each other with the expansion control unit by the short wave ultraviolet light signal input unit, and described AD sampling unit links to each other with the signal gathering unit of gathering the bus current signal; The output of described output control unit links to each other with the bus circuit breaker.
Described single-chip microcomputer, short wave ultraviolet light signal input unit, AD sampling unit, output control unit, communication unit, human and machine interface unit and power circuit unit all adopt modularization integrated, above-mentioned integration module is installed in the casing, described human and machine interface unit is integrated on the front panel of casing, and described single-chip microcomputer, short wave ultraviolet light signal input unit, AD sampling unit, output control unit, communication unit and power circuit unit are integrated on the backboard of casing.
Described single-chip microcomputer comprises first CPU module and second CPU module, and described first CPU module links to each other with the bus of second CPU module by single-chip microcomputer inside.
Described human and machine interface unit includes liquid crystal display screen, indicator light and operation push-button, and described liquid crystal display screen is installed in the middle and upper part of above-mentioned front panel, and the right side of liquid crystal display screen is provided with indicator light, and the below of liquid crystal display screen is provided with operation push-button.
The top of described backboard is disposed with power supply module, first CPU module, second CPU module, alternating current conversion module, signal module from left to right, and the bottom of backboard is disposed with communication interface module, the first short wave ultraviolet light NIM, the second short wave ultraviolet light NIM, the 3rd short wave ultraviolet light NIM, the 4th short wave ultraviolet light NIM and breaker tripping and closing outlet module from left to right.
Described short wave ultraviolet light detecting sensor includes short wave ultraviolet light detecting sensor part, photoelectric signal converter, signal amplification circuit and current signal output circuit, described short wave ultraviolet light detecting sensor part links to each other with the current signal output circuit after being connected in series photoelectric signal converter and signal amplification circuit successively, and described current signal output circuit links to each other with the expansion control unit.
The beneficial effect that the present invention compared with prior art has is:
One, the present invention has adopted main criterion (short wave ultraviolet light detection) to add the new principle of assistant criteria (inlet wire current), can judge busbar fault and disengagement failure rapidly accurately; Overcome the influence that extraneous light is judged fault, reached the purpose of accurate action;
Two, all modularization and standardization of all functions unit of the present invention, mode with plug-in unit is integrated on the casing, 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 external electromagnetic interference in the coupling of weak-feedback side of transmission line, strengthen the antijamming capability of this device, improve its reliability and fail safe, whole apparatus structure is succinct, installs and uses easy to maintenance;
Three, the present invention has very strong flexibility in functional configuration; be equipped with the Dual-Ethernet communication interface; can change or increase part module according to user's request; expand or change the function of this device; can realize the defencive function of distance protection, zero-sequenceprotection and three-phase single shot reclosing, can also realize transmitter functions simultaneously, all remote measurement amounts provide the output of 4-20mA analog quantity; whole apparatus function is powerful, and is practical.
Description of drawings
The present invention will be further described in detail below in conjunction with accompanying drawing:
Fig. 1 is electrical block diagram of the present invention;
Fig. 2 is the structural representation of casing among the present invention;
Fig. 3 is the structural representation of casing backboard among the present invention;
Among the figure: 1 is the short wave ultraviolet light detecting sensor; 2 are the expansion control unit; 3 is short wave ultraviolet light bus protection master unit; 4 is single-chip microcomputer; 5 is the short wave ultraviolet light signal input unit; 6 is the AD sampling unit; 7 is output control unit; 8 is communication unit; 9 is human and machine interface unit; 10 is the power circuit unit; 11 is signal gathering unit; 12 is the bus circuit breaker; 13 is casing; 14 is front panel; 15 is backboard; 16 is the power supply module; 17 is alternating current conversion module; 18 is the signal module; 19 is the communication interface module; 20 is the first short wave ultraviolet light NIM; 21 is the second short wave ultraviolet light NIM; 22 is the 3rd short wave ultraviolet light NIM; 23 is the 4th short wave ultraviolet light NIM; 24 are the outlet module that closes a floodgate; 101 is short wave ultraviolet light detecting sensor part; 102 is photoelectric signal converter; 103 is signal amplification circuit; 104 is the current signal output circuit; 401 is first CPU module; 402 is second CPU module; 901 is liquid crystal display screen; 902 is indicator light; 903 is operation push-button.
Embodiment
As shown in Figure 1 to Figure 3; short wave ultraviolet light protection equipment for busbar of the present invention; comprise: a plurality of short wave ultraviolet light detecting sensors 1, a plurality of expansion control unit 2 and short wave ultraviolet light bus protection master unit 3; described short wave ultraviolet light detecting sensor 1 is installed in bus arc light monitoring position and gathers short wave ultraviolet, and short wave ultraviolet light detecting sensor 1 links to each other with short wave ultraviolet light bus protection master unit 3 by expansion control unit 2.
Described short wave ultraviolet light bus protection master unit 3 comprises: single-chip microcomputer 4, short wave ultraviolet light signal input unit 5, AD sampling unit 6, output control unit 7, communication unit 8, human and machine interface unit 9 and power circuit unit 10; described single-chip microcomputer 4 links to each other with short wave ultraviolet light signal input unit 5, AD sampling unit 6, output control unit 7, communication unit 8 and human and machine interface unit 9 respectively, and above-mentioned power circuit unit 10 is whole short wave ultraviolet light bus protection master unit 3 power supplies.
Described short wave ultraviolet light bus protection master unit 3 links to each other with expansion control unit 2 by short wave ultraviolet light signal input unit 5, and described AD sampling unit 6 links to each other with the signal gathering unit 11 of gathering the bus current signal; The output of described output control unit 7 links to each other with bus circuit breaker 12.
Described short wave ultraviolet light detecting sensor 1 includes short wave ultraviolet light detecting sensor part 101, photoelectric signal converter 102, signal amplification circuit 103 and current signal output circuit 104, described short wave ultraviolet light detecting sensor part 101 is connected in series photoelectric signal converter 102 successively and links to each other with current signal output circuit 104 with signal amplification circuit 103 backs, and described current signal output circuit 104 links to each other with expansion control unit 2.
A large amount of visible lights and middle long wave ultraviolet light are arranged in the surroundings, short wave ultraviolet light UVC(wavelength 200～275 nanometers) but seldom, and switch cubicle can produce a large amount of short wave ultraviolet lights when inner arc fault takes place, utilizing this feature physical quantity to take place several milliseconds in fault judges with interior make accurately, the intrinsic operate time that adds circuit breaker just can be again open failure in 100 milliseconds, concerning the protection of switch cubicle internal fault, so just can realize the ultrahigh speed performance; Adopt short wave ultraviolet light to survey among the present invention, the influence that can avoid natural daylight that arc light is judged, avoided because the misoperation that natural daylight causes, reach the purpose of accurate response, the independent judgement that can adopt short wave ultraviolet light to survey in actual applications, also can adopt main criterion (short wave ultraviolet light detection) to add the new principle of assistant criteria (inlet wire current), by arc light and the two judgements of overcurrent, further improve the reliability of system acting.
After above-mentioned single-chip microcomputer 4 obtains the digital signal of sampling, carry out the amplitude information of digital filtering and algorithm computing acquisition analog quantity, respectively through the logic of protection software module judge, show handle, links such as report storage, record ripple, also send orders such as tripping operation, signal after the action simultaneously to outlet loop when electric current satisfies protection operation condition and short wave ultraviolet light; Because the space that single-chip microcomputer 4 inner nothings are deposited program, defence program is to leave among the flash memory FLASH, and single-chip microcomputer 4 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, and the initialization in the main program mainly is that whole system is that operate as normal is ready.
Main program mainly comprises among the present invention: 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 by main program and handle, the result of information processing is sent to and shows that print module shows, print, 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 electric current and voltage, 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 is correctly carried out, if correct execution then change circulation next time 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, the state of a control of initialization simultaneously, next show main menu, adopt inquiry mode to handle keyboard at last and communicate by letter with the A/D conversion and with intelligent object, obtain information, communicate by letter with host computer and to adopt the interruption form, and interrupt levels is made as the highest, and the input of switching value is taked to produce earlier to interrupt, the method for back inquiry.
Above-mentioned AD sampling unit 6 realizes that multichannel exchanges the analog-to-digital conversion of analog signal, and provides real-time high-precision digital signal to single-chip microcomputer 4; Electric weight in the electric power system generally all is analog quantity, the realization of digital relay protection then is based on by microcomputer and digital quantity is calculated and judges, so in order to realize the computer relaying protection, must carry out series of preprocessing to the simulation electric weight from protected location equipment, thereby the digital quantity that obtains desired form offers the defencive function handling procedure; The analog signal that is input to protective relaying device by electric power system mainly is from PT(or CT) alternating voltage (or electric current) signal; According to sampling thheorem: if measured signal frequency (or will keep in the signal high order harmonic component frequency) is f0, the sampling number of sample frequency fk(each second then) must be greater than 2 times of fk, otherwise, just can not be reduced into original curve by the sampled value match, therefore, at the harmonic wave that occurs greater than 1/2 fk frequency, and these harmonic waves are again under the useless situation, are necessary that introducing sampler at signal installed in the past that an analog low pass pass filter equals frequency and the high order harmonic component that is higher than 1/2 fk filters; Therefore analog signal at first is switched to the level that is complementary with microcomputer, by prune wherein radio-frequency component of mould filtering, keeps link with the continuous signal discretization by sampling then; Because often more than one of input signal becomes digital quantity so give A/D transducer one by one by multiplexer; These digital quantities also should arrange to make things convenient for the function treatment program to take in memory sequentially.
The present invention sets up the low-pass filtering loop that the two-stage Resistor-Capacitor Unit constitutes in the circuit design of AD sampling unit 6, the analog quantity input signal is through the low-pass filtering loop, respectively signal is inserted the input of two multicircuit switch devices, the output signal of multicircuit switch is passed to the input circuit of AD conversion chip respectively, carry out analog-to-digital conversion, regularly read the result of AD conversion by CPU, be used as the original sampling data of each road analog quantity.
Can increase DI by expansion module among the present invention opens into the unit, DI opens into the unit to from the opening into amount of external connector, after opening entry loop photoelectricity and isolating, through tri-state gate circuit to single-chip microcomputer 4 inputs, judge anti-interference process through software logic, obtain and open 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.
Above-mentioned output control unit 7 is carried 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 4 sends the outlet order, must send the unlocking signal, drive starting relay simultaneously and can drive exit relay, send trip signal.
Described single-chip microcomputer 4, short wave ultraviolet light signal input unit 5, AD sampling unit 6, output control unit 7, communication unit 8, human and machine interface unit 9 and power circuit unit 10 all adopt modularization integrated, above-mentioned integration module is installed in the casing 13, described human and machine interface unit 9 is integrated on the front panel 14 of casing 13, and described single-chip microcomputer 4, short wave ultraviolet light signal input unit 5, AD sampling unit 6, output control unit 7, communication unit 8 and power circuit unit 10 are integrated on the backboard 15 of casing 13.
Described single-chip microcomputer 4 comprises first CPU module 401 and second CPU module 402, and described first CPU module 401 links to each other with the bus of second CPU module 402 by single-chip microcomputer 4 inside.
Described human and machine interface unit 9 includes liquid crystal display screen 901, indicator light 902 and operation push-button 903, described liquid crystal display screen 901 is installed in the middle and upper part of above-mentioned front panel 14, the right side of liquid crystal display screen 901 is provided with indicator light 902, and the below of liquid crystal display screen 901 is provided with operation push-button 903; The circuit design of human and machine interface unit 9 is mainly considered the convenience of the man-machine interaction of bay device, 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.
The top of described backboard 15 is disposed with power supply module 16, first CPU module 401, second CPU module 402, alternating current conversion module 17, signal module 18 from left to right, and the bottom of backboard 15 is disposed with communication interface module 19, the first short wave ultraviolet light NIM 20, the second short wave ultraviolet light NIM 21, the 3rd short wave ultraviolet light NIM 22, the 4th short wave ultraviolet light NIM 23 and breaker tripping and closing outlet module 24 from left to right.
Above-mentioned power supply module 16 upper left-hand are provided with the 8X01-8X12 binding post, amount to 12, the middle part is provided with+5V and+the 24V power supply, the right side, bottom is provided with mains switch.
Above-mentioned alternating current conversion module 17 is provided with the 2X01-2X20 binding post, amounts to 10, all is arranged on the left side, and the right side is provided with the binding post busbar of forceful electric power; The conversion of 4 power pack LH difference is the magnitude of current of four road binding posts wherein, the conversion of 4 voltage changer YH difference is the voltage of four road binding posts wherein, alternating current conversion module 20 also can install three drive test magnitude power packs additional, line attachment is measured CT, is used for line current, power etc. and measures usefulness.
Above-mentioned first CPU module 401 is made up of CPU and peripheral wiring circuit, and it is provided with the 4X01-4X14 binding post, amounts to 14, all is arranged on the left side, realizes output and the input of various command, finishes short wave ultraviolet light bus protection function.
Above-mentioned second CPU module 402 is made up of CPU and peripheral wiring circuit, and it is provided with the 5X01-5X14 binding post, amounts to 14, all is arranged on the left side, realizes output and the input of various command, finishes other miscellaneous functions.
Above-mentioned signal module 18 upper left-hand are provided with the 9X01-9X22 binding post; amount to 22; wherein comprise two groups of guard signals; can be respectively as central signal and remote motion signal; the output of tripping operation exit relay; overlap the output of tripping operation exit relay, back output is closed in tripping operation, starts malfunctioning relay output and tripping operation exit relay contact polyphone.
Above-mentioned communication interface module 19 is provided with the 7X01-7X18 binding post, amount to 18, upper left-hand is provided with the 7X01-7X10 binding post, and upper right is provided with the 7X11-7X18 binding post, the middle and lower part is provided with printer port, and the bottom is provided with two Ethernet interfaces.
Above-mentioned breaker tripping and closing outlet module 24 is provided with the 11X01-11X22 binding post, amounts to 22, wherein comprises the output of 6 groups of tripping operations.
Claims (6)
1. short wave ultraviolet light protection equipment for busbar, it is characterized in that: comprising: a plurality of short wave ultraviolet light detecting sensors (1), a plurality of expansion control unit (2) and short wave ultraviolet light bus protection master unit (3), described short wave ultraviolet light detecting sensor (1) is installed in bus arc light monitoring position and gathers short wave ultraviolet, and short wave ultraviolet light detecting sensor (1) links to each other with short wave ultraviolet light bus protection master unit (3) by expansion control unit (2);
Described short wave ultraviolet light bus protection master unit (3) comprising: single-chip microcomputer (4), short wave ultraviolet light signal input unit (5), AD sampling unit (6), output control unit (7), communication unit (8), human and machine interface unit (9) and power circuit unit (10), described single-chip microcomputer (4) respectively with short wave ultraviolet light signal input unit (5), AD sampling unit (6), output control unit (7), communication unit (8) links to each other with human and machine interface unit (9), and above-mentioned power circuit unit (10) is whole short wave ultraviolet light bus protection master unit (3) power supply;
Described short wave ultraviolet light bus protection master unit (3) links to each other with expansion control unit (2) by short wave ultraviolet light signal input unit (5), and described AD sampling unit (6) links to each other with the signal gathering unit (11) of gathering the bus current signal; The output of described output control unit (7) links to each other with bus circuit breaker (12).
2. short wave ultraviolet light protection equipment for busbar according to claim 1; it is characterized in that: described single-chip microcomputer (4); short wave ultraviolet light signal input unit (5); AD sampling unit (6); output control unit (7); communication unit (8); human and machine interface unit (9) and power circuit unit (10) all adopt modularization integrated; above-mentioned integration module is installed in the casing (13); described human and machine interface unit (9) is integrated on the front panel (14) of casing (13), described single-chip microcomputer (4); short wave ultraviolet light signal input unit (5); AD sampling unit (6); output control unit (7); communication unit (8) and power circuit unit (10) are integrated on the backboard (15) of casing (13).
3. short wave ultraviolet light protection equipment for busbar according to claim 2; it is characterized in that: described single-chip microcomputer (4) comprises first CPU module (401) and second CPU module (402), and described first CPU module (401) links to each other by the inner bus of single-chip microcomputer (4) with second CPU module (402).
4. short wave ultraviolet light protection equipment for busbar according to claim 3; it is characterized in that: described human and machine interface unit (9) includes liquid crystal display screen (901), indicator light (902) and operation push-button (903); described liquid crystal display screen (901) is installed in the middle and upper part of above-mentioned front panel (14); the right side of liquid crystal display screen (901) is provided with indicator light (902), and the below of liquid crystal display screen (901) is provided with operation push-button (903).
5. short wave ultraviolet light protection equipment for busbar according to claim 4; it is characterized in that: the top of described backboard (15) is disposed with power supply module (16) from left to right; first CPU module (401); second CPU module (402); alternating current conversion module (17); signal module (18), the bottom of backboard (15) is disposed with communication interface module (19) from left to right; the first short wave ultraviolet light NIM (20); the second short wave ultraviolet light NIM (21); the 3rd short wave ultraviolet light NIM (22); the 4th short wave ultraviolet light NIM (23) and breaker tripping and closing outlet module (24).
6. according to the described short wave ultraviolet light protection equipment for busbar of the arbitrary claim of claim 1 to 5; it is characterized in that: described short wave ultraviolet light detecting sensor (1) includes short wave ultraviolet light detecting sensor part (101); photoelectric signal converter (102); signal amplification circuit (103) and current signal output circuit (104); described short wave ultraviolet light detecting sensor part (101) is connected in series photoelectric signal converter (102) successively and links to each other with current signal output circuit (104) with signal amplification circuit (103) back, and described current signal output circuit (104) links to each other with expansion control unit (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101445900A CN103248016A (en) | 2013-04-24 | 2013-04-24 | Short-wave ultraviolet light bus protection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101445900A CN103248016A (en) | 2013-04-24 | 2013-04-24 | Short-wave ultraviolet light bus protection device |
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| CN103248016A true CN103248016A (en) | 2013-08-14 |
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| CN2013101445900A Pending CN103248016A (en) | 2013-04-24 | 2013-04-24 | Short-wave ultraviolet light bus protection device |
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| CN107134759A (en) * | 2017-06-01 | 2017-09-05 | 上海金友金弘智能电气股份有限公司 | A kind of intelligent photovoltaic preassembled transformer station high voltage bus protection device and its application method |
| CN111009886A (en) * | 2019-11-20 | 2020-04-14 | 金诗瑶 | Remote-set power protection method and device |
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| CN111009886B (en) * | 2019-11-20 | 2022-04-01 | 金诗瑶 | Remote-set power protection method and device |
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Application publication date: 20130814 |