CN2456176Y

CN2456176Y - Circuit breaker online monitor

Info

Publication number: CN2456176Y
Application number: CN 00261382
Authority: CN
Inventors: 刘正祥; 李青峰; 赵永辉; 张安社
Original assignee: 王农
Priority date: 2000-12-04
Filing date: 2000-12-04
Publication date: 2001-10-24
Anticipated expiration: 2010-12-04

Abstract

The utility model relates to a breaker on-line monitor which comprises a single chip computer and a memory connected with the single chip computer through a data bus. The breaker on-line monitor is characterized in that the input end of the single chip computer is respectively connected with an analog quantity and an open-in quantity, the output end is provided with a launch quantity, a serial port is connected with a communication interface, and the single chip computer 80c196 is connected with an on-site programmable logic device and a clock via the data bus. The utility model can monitor in real time, reduce operation and maintenance cost and failure rate and extend the service life of equipment.

Description

The isolating switch on-Line Monitor Device

The utility model relates to a kind of monitoring device that all types of primary cut-outs of 6KV～500KV is carried out on-line monitoring.

Isolating switch is the important main equipment of power transformation, and its shared quantity is maximum, and failure rate proportion in electrical network is only second to line fault, is the main monitoring target in the converting equipment.What power supply enterprise adopted for a long time all is scheduled overhaul and trouble hunting system.Promptly regardless of the equipment actual state, as long as " expiring " will " overhaul ", blindness is big.Not only need drop into a large amount of manpower and materials, increase the scheduled outage time, also increase the possibility of personal injury and misoperation fault simultaneously, seriously restrict the raising of power supply reliability, also influence the advance of electrical network.Details are as follows for the shortcoming of prior art:

1, prophylactic repair causes a large amount of wastes.For example, isolating switch may be between turn(a)round in and attonity, its performance is intact, but according to prophylactic repair require required it is overhauled and changes spare part, thereby cause the unnecessary manpower and the loss of material resources;

2, prophylactic repair has increased the possibility of misoperation fault and personal injury.All owing to overhaul improper causing, simultaneously, because isolating switch is used for the switching of voltage levels, minimum carelessness just may cause personal injury to the maintainer to a lot of circuit breaker failures, and the increase of maintenance number of times has increased the accident probability;

3, frequent operation and excessive demolition maintenance can reduce the reliability that primary cut-out moves.And along with growth in the living standard, people are also more and more higher to the requirement of power supply reliability, and the frequent power failure that prophylactic repair is brought will cause inconvenience;

4, prophylactic repair can't be monitored in real time, can not guarantee that isolating switch remains intact in operational process, and some parts has damaged during not to the repair time, therefore still can't avoid the generation of accident.

The purpose of this utility model is to avoid above-mentioned weak point of the prior art, and a kind of real-time monitoring is provided, and greatly reduces operation, maintenance cost and failure rate, has prolonged the isolating switch on-Line Monitor Device of service life of equipment

Design proposal of the present utility model is as follows:

A kind of isolating switch on-Line Monitor Device, comprise single-chip microcomputer 1 and the storer 3 that joins with it by data bus, its special character is: described single-chip microcomputer 1, its input end is connected to analog quantity 8 respectively and opens into 6, its output terminal is connected to the amount of leaving 7, its serial port is connected to communication interface 5, and it also is connected to field programmable device 2 and clock 4 by data bus, and described single-chip microcomputer 1 is 80C196.

Above-mentioned analog quantity 8 can comprise amplifier U6 and the amplifier U7 that is connected to sensor G acquired signal output terminal and live signal output terminal respectively, described amplifier U7 output terminal connects the A/D acquisition interface in the single-chip microcomputer 1, and the filtering circuit that the output terminal of described amplifier U6 constitutes through resistance R, capacitor C connects the A/D sampling interface in the single-chip microcomputer 1.

Above-mentioned opening into amount 6 can comprise optocoupler U4, and its output terminal connects the hsi port of single-chip microcomputer 1; The described amount of leaving 7 comprises optocoupler U5, and its input end is connected to the high-speed output end of single-chip microcomputer 1, its output relay termination J.

Above-mentioned communication interface 5 can comprise optocoupler U1, and its input end connects the serial port of single-chip microcomputer 1, and its output terminal is connected to level conversion U2, U3.

Above-mentioned field programmable device 2 can adopt the peripheral expansion circuit that single-chip microcomputer 1 is needed all to be integrated in the interior chip of an encapsulation; Described clock 4 can adopt the real-time timepiece chip that contains lithium battery, quartz crystal oscillator and write-protect circuit.

The accompanying drawing drawing is described as follows:

Fig. 1 is a theory diagram of the present utility model;

Fig. 2 is the circuit theory diagrams of communication interface of the present utility model:

Fig. 3 is of the present utility model opening into the amount circuit theory diagrams;

Fig. 4 is the amount of leaving circuit theory diagrams of the present utility model;

Fig. 5 is the circuit theory diagrams of analog quantity one tunnel input of the present utility model.

The utility model is described in further detail below in conjunction with accompanying drawing:

Referring to Fig. 1, single-chip microcomputer 1 of the present utility model, its input end are connected to analog quantity 8 respectively and open into amount 6, and its output terminal is connected to the amount of leaving 7, and its serial port is connected to communication interface 5.Clock 4, storer 3 and field programmable device 2 join by data bus and single-chip microcomputer 1.Single-chip microcomputer 1 of the present utility model can adopt 80C196, and it is the high performance CHMOS16 position single-chip microcomputer that INTER company releases, and it has comprised the various circuit that in the past are considered to external unit, as clock generator, the I/O mouth, A/D converter, PWM, serial port, Timer, watchdog timer, high speed I/O device, peripheral hardware task server PTS, waveform generator etc.The maximum characteristics of this single-chip microcomputer are that RALU does not adopt conventional totalizer structure, and it is operated directly towards 256 byte register space.Eliminate the ink-bottle effect of totalizer, quickened the ability of exchanges data and change, improved the power of handling up of singlechip CPU.Thereby be particularly useful for receiving, store, handle and the transmission image data.The PSD813F1 that field programmable device 2 adopts WSI company to produce, it all is integrated in the peripheral expansion circuit that single-chip microcomputer 1 needs in the encapsulation, has reduced the component number of hardware circuit, has improved the reliability of system.PSD813F1 device inside structure comprises following a few part:

(1) as the FPGA (Field Programmable Gate Array) PLD of core, by flash decoding PLD, formations such as the general PLD of flash realize specific logic by the developing instrument programming;

(2) bus control logic can directly be deciphered, and directly is connected with singlechip CPU and does not need other additional logic, AD0-AD15 data bus to be connected with the P4 mouth with the P3 mouth of CPU;

(3) FLASH that includes the 1M position is used for stored programme, and the EPROM of 256K position, the SRAM of 16K position are used for depositing the data that CPU gathers and handles;

(4) A, B, C, four I/O ports of D, each I/O pin all can be constructed separately.Set by cpu instruction.

Storer 3 adopts 62256, and it is connected with single-chip microcomputer 1 by data bus, and chip selection signal is by field programmable device 2, and promptly the PC7 of PSD813 provides, and is used for depositing single-chip microcomputer 1 by the A/D conversion mouthful recorder data that collection comes.Clock 4 adopts DS12887, is real time clock device, and the integrated level height does not need the peripheral circuit support, and is very convenient with user interface.Especially this chip includes lithium battery, quartz crystal oscillator and write-protect circuit, is a complete subsystem.It is connected by RD, WR pin and data bus with single-chip microcomputer 1, and chip selection signal is provided by the PD1 pin of field programmable device 2, and single-chip microcomputer 1 can carry out the setting of time and reads it.

Referring to Fig. 2, the RS-485 bus that the utility model communication interface 5 adopts connects all devices by four order wires, realizes the multi-point bus structure.Disturb in order to reduce circuit, adopt TIL521 optocoupler U1 to isolate.Level conversion U2, U3 can adopt MAX1487, are used for the Transistor-Transistor Logic level of single-chip microcomputer 1 output is converted to the differential level of bus requirements and differential level is converted to Transistor-Transistor Logic level.Single-chip microcomputer 1, is controlled permission or is forbidden communication by HSO3 through optocoupler U1 outputting communication information by serial port TXD, RXD.

Referring to Fig. 3, for fear of of the interference of power station highfield to signal, adopt TIP521 optocoupler U4 split into isolating switch auxiliary contact signal isolate the hsi port of back input single-chip microcomputer 1.Wherein the isolating switch normally closed contact is often opened auxiliary contact and is connected into HSI1 by the HSI0 that optocoupler U4 is connected into single-chip microcomputer 1.

Referring to Fig. 4, system's amount of leaving is the contact point signal of circuit breaker J, adopts the output of the optocoupler U5 control 24V relay J of band Darlington output.When device produced alerting signal, by the high speed output pin HSO0 output control signal of single-chip microcomputer 1, the light by optocoupler U5 made the relay J closure after amplifying.

Referring to Fig. 5, the conversion of signals that system will gather by sensor G is the input of 0-20ma standard signal, and amplifier U6 is that the LF353 of U402B carries out a utmost point and follows, the A/D that sends into single-chip microcomputer 1 after resistance R and capacitor C the are carried out filtering interface of sampling.The live signal of sensor G output is-the 2.5V-2.5V AC signal, and single-chip microcomputer 1 can only be gathered the 0-5V direct current signal, therefore, the live signal choosing is added a 2.5V be converted into the 0-5V signal is imported single-chip microcomputer 1 after amplifier U7 one utmost point is followed A/D sampling interface.

During work, the isolating switch on-Line Monitor Device is by CT secondary acquisition system power signal, be the A/D conversion mouth of current signal input single-chip microcomputer 1 through high precision punching Hall element with three-phase current and branch, brake cable loop current, Oil pump electrical machinery current conversion respectively, isolating switch displacement signal, temperature-humidity signal, pressure signal imported single-chip microcomputers 1 through analog quantity 8 by displacement transducer, Temperature Humidity Sensor, pressure transducer.

When a, normal operation of circuit breaker, device collection three-phase electricity flow valuve, divide-shut brake coil current value, humiture situation of change, oil pump is in real time suppressed situation, SF6 gaseous tension situation.Single-chip microcomputer 1 is gathered the analog signals that comes by the A/D mouth with these and is handled after analog quantity 8 leaves among the SRAM that field programmable device 2 is PSD813.

When b, isolating switch disjunction, single-chip microcomputer 1 detects current break on the switching winding, and switching winding and three-phase current waveform and contact moving displacement are carried out high-density sampling, and the result that will gather puts into storer 3, promptly in the RAM chip 62256.When if switching winding energising finishes, the isolating switch attonity, then single-chip microcomputer 1 sends alerting signal by HSO0.Open actuating signal if receive the isolating switch auxiliary contact into amount 6, the operation of recording time, and jump the type that circuit breaker signal and guard signal and size of current are judged disjunction according to the hand that inserts, add up action frequency once.

C, each isolating switch branch are had no progeny, the dropout current that system will add up three-phase current and the number of operations that is kept at two sections of a section of zero load, load, fault, faults setting among the EEPROM, three sections of faults and setting value are relatively sent the maintenance warning by HSO0 by the amount of leaving 7 when surpassing the turnaround plan of setting.

D, circuit breaker closing are fashionable, and CPU overhauls the closing coil current break, to closing coil, three-phase state and isolating switch, contact moving displacement, auxiliary contact is sampled and the result that will gather puts into storer 3, promptly in the RAM chip 62256.If the isolating switch attonity was then sent alerting signal through the amount of leaving 7 when the closing coil energising finished.

E, monitor current of electric when sudden change as CPU, gather and also to calculate the motor suppressed time, 1S average current, 5S steady current, the data result of gathering is kept among the SRAM of PSD813 as, find that suppressed time is long or current value is too high or too low, all can produce warning.Simultaneously, suppress parameters such as date, time and being kept among the EEROM that field programmable device 2 is PSD813 under the system log (SYSLOG).

F, when CPU monitor the SF6 gaseous tension less than PSD813 in during the setting value of EEROM, will send alerting signal.

G, when CPU monitors humiture when surpassing the setting value of EEROM among the PSD813, will send alerting signal.

H, when single-chip microcomputer 1 monitors host computer communication when calling by communication interface 5, the data that are about to gather pass to host computer by serial port by the RS-485 bus.

The utility model compared with prior art has following advantage:

1, greatly reduces maintainer's field trial and surveying work amount, reduced maintenance cost, keep away Exempted from unnecessary spare parts consumption;

2, reduce regular equipment rebuilding, reduced because improper or unnecessary maintenance causes the possibility of fault The property;

3, Real-Time Monitoring is pinpointed the problems in bud, can save a large amount of man power and materials, reliably keeps away Exempt from the generation of accident and fault, and can set up interim operation constraint, the prompting problem is to the direction of more seriousization Development;

4, reduce unplanned power off time, improved power supply reliability;

5, prolonged the breaker life-span, equipment operating data storehouse and dynamic state of parameters surveillance coverage have been arranged, can be more Predict exactly the life-span of equipment.

The breaker service data that can't gather when 6, original online can exist by special sensor now Line is gathered, by microprocessor processes with upload, thereby realize the on-line real time monitoring of breaker, improved Reliability of operation.

Claims

1, a kind of isolating switch on-Line Monitor Device, the storer (3) that comprises single-chip microcomputer (1) and join with it by data bus, it is characterized in that: described single-chip microcomputer (1), its input end is connected to analog quantity (8) respectively and opens into amount (6), its output terminal is connected to the amount of leaving (7), its serial port is connected to communication interface (5), and it also is connected to field programmable device (2) and clock (4) by data bus, and described single-chip microcomputer (1) is 80C196.

2, isolating switch on-Line Monitor Device as claimed in claim 1, it is characterized in that: described analog quantity (8) comprises amplifier U6 and the amplifier U7 that is connected to sensor G acquired signal output terminal and live signal output terminal respectively, described amplifier U7 output terminal connects the A/D acquisition interface in the single-chip microcomputer (1), and the filtering circuit that the output terminal of described amplifier U6 constitutes through resistance R, capacitor C connects the A/D sampling interface in the single-chip microcomputer (1).

3, isolating switch on-Line Monitor Device as claimed in claim 1 or 2 is characterized in that: described opening into amount (6) comprises optocoupler U4, and its output terminal connects the hsi port of single-chip microcomputer (1); The described amount of leaving (7) comprises optocoupler U5, and its input end is connected to the high-speed output end of single-chip microcomputer (1), its output relay termination J.

4, isolating switch on-Line Monitor Device as claimed in claim 3 is characterized in that: described communication interface (5) comprises optocoupler U1, and its input end connects the serial port of single-chip microcomputer (1), and its output terminal is connected to level conversion U2, U3.

5, isolating switch on-Line Monitor Device as claimed in claim 4 is characterized in that: described field programmable device (2) adopts the peripheral expansion circuit of single-chip microcomputer (1) needs all is integrated in the interior chip of an encapsulation; Described clock (4) is the real-time timepiece chip that contains lithium battery, quartz crystal oscillator and write-protect circuit.