CN2336385Y

CN2336385Y - Microcomputerized automatic testing and handling device for taps of transformer

Info

Publication number: CN2336385Y
Application number: CN 97227401
Authority: CN
Inventors: 周宏铎; 马占清
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-09-24
Filing date: 1997-09-24
Publication date: 1999-09-01
Anticipated expiration: 2007-09-24

Abstract

The utility model relates to a microcomputer automatic testing and handling device for gears of a transformer. A microprocessor 8031 is used as a control center. The 2764 is used as a program memory. The 8255 is used as an extension I/O port. An eight-section digital tube is used as a display. The isolated data transfer is achieved via a photoelectric coupler and a control cabinet of the gears of the transformer to realize that the gears of the transformer are displayed on site and the coded gears of the transformer are transmitted to the on-site control cabinet and then to a computer control center, so the remote onloaded automatic voltage regulation function is realized. Therefore, converting stations can be completely under the normal operation in the unattended operation case.

Description

Transformer gear microcomputer detects treating apparatus automatically

The utility model belongs to electric control system, the transformer gear microcomputer that a kind of transformer on-load voltage regulating is used detect automatically treating apparatus,

Existing transformer has the work of carrying in service, the detection indicator gauge is housed on regulator cubicle, by contact switch under the 220V voltage drive, switch closure, its corresponding gear shows, and adopts manual control by group, by the group actuating motor, motor drives gear connecting rod, connecting rod connects the output contact of transformer, and output voltage is adjusted to required voltage numerical value, observes by the operator on duty, operation conditions is reported the higher level by phone, under the higher level instructed, the operator on duty implemented artificial adjustment, and the defective of its existence is: the hig diligence that needs operating personnel, at all dare not happyly anticipate, otherwise serious accident will take place.

The purpose of this utility model is that a kind of transformer gear microcomputer of design detects treating apparatus automatically, give the field control cabinet with the transformer gear transducing signal of each transformer station, switch board is given computer controlling center by optical cable or microwave transmission again, computing machine by control center is planned as a whole control to the variable signal of the transformer of each transformer station, and send instruction as required and give the field control cabinet, change the gear of transformer, thereby realize unmanned, automatic Regulation.

For achieving the above object, the utility model adopts following technical scheme:

Described transformer gear microcomputer detects treating apparatus automatically, has the transducing signal acquisition system, 8031 central little process chip, the EPROM memory under program, 8255 expansion I/O mouths and eight sections charactron display systems are through the control that input, coding, change that transfer wire connects to form the transformer gear are sent, demonstration etc. realizes the quantitative and qualitative of variable signal.

Described transformer gear microcomputer detects treating apparatus automatically, and its collecting sensor signal system comprises several switch with mechanical contacts of sensor, and some connection leads connect these contact switchs, and two lines connect the common port of external sensor ,+5V power supply.The contact switch line is connected on 8031 1-8 pin respectively, 8255 1-4 pin, and 8255 10-25 pin, on 8255 the 37-40 pin, these pins of 8031 and 8255 are exactly the input port.When some switch closure of external sensor, 8031 or 8255 the pin that connects this switch becomes high level 1; Otherwise this pin is a low level 0.8031 read 8255 pin data by data bus, judge according to the high-low level of these pins whether the switch of sensor contact is closed.The 2764th, deposit the memory of program, 8031 must be by 74LS373 connection could be from 2764 program fetch.Three 74LS164 are used for output, and its first is used for being communicated with outer computer control center, and second, third sheet is used to connect two eight sections charactrons and shows the current gear of living in of transformer.

Described transformer gear microcomputer detects treating apparatus automatically, its photoelectricity coupling display system, have three 74LS164 chips, five external current-limiting resistances of TIL113 photoelectricity coupling chip, light emitting diode, five output terminals A, B, C, D, E and connect power end, two eight hop count sign indicating number displays output signal to the field control cabinet.

Described transformer gear microcomputer detects treating apparatus automatically, and this installs power unit, input 220V AC power, through the transformer step-down, become low-voltage DC after the rectifier bridge rectification, again through filtering, voltage stabilizing, become stable+5V power supply after the filtering, the each several part of power circuit board uses.

Owing to adopt as above technical scheme, the utlity model has following advantage:

Transformer gear microcomputer detects treating apparatus automatically, it can utilize the sensor contact switching system, detect and show the gear of transformer at the scene, send the gear data of transformer to the field control cabinet, then by switch board by optical cable or microwave transmission computer controlling center to power administration, computing machine by control center realizes concentrating pool control to the transformer gear of each transformer station, the speed and the correctness of systems exchange data have been realized, under unattended situation, realized long-range loaded automatic voltage-regulating and safety utilization of electric power requirement, avoided causing the possibility of major accident owing to careless and inadvertent or other reason of people.

Below in conjunction with the description of drawings specific embodiment of the utility model:

Accompanying drawing is that transformer gear microcomputer detects the treating apparatus circuit theory diagrams automatically.

As shown in FIG., transformer gear microcomputer detects treating apparatus automatically, the contact switch of its sensor connects 8031 1-8 pin, 8255 1-4 pin, the 10-25 pin, 37-40 pin and connect the 5V power supply, 8031 export to three 74LS164,3 74LS164 export to the data of outer computer communication, and connect two current present positions of eight sections charactrons demonstration transformer.

The following describes the annexation between each chip:

Pin1～Pin8 of 8031: input port.

Pin9: reset terminal is provided the positive pulse of an electrification reset by outside RC charging circuit.

Pin10: the serial delivery outlet is connected on the Pin1 and Pin2 of first 74LS164.

Pin11: serial output clock is connected on the Pin8 of three 74LS164.

Pin16: write signal is connected on 8255 the Pin36, to 8255 writing informations.

Pin17: read signal is connected on 8255 the Pin5, from 8255 sense informations.

Pin18 and Pin19: the input and output pin of oscillatory circuit, on the external oscillatory circuit that constitutes by crystal oscillator.

Pin20: power supply ground.

Pin21～Pin25: address bus, be connected on 2764 Pin25Pin24Pin21 respectively, Pin23 is on the Pin2, as the high address line of instruction fetch from 2764.

Pin29: the program fetch line, be connected on 2764 the Pin22, when it was effective, 2764 sent an instruction.

Pin30: the address latch line, be connected on the Pin11 of 74LS373, when it was effective, 74LS373 pinned data, the address as 2764 and 8255.

Pin31: ground connection.

Pin32～Pin39: data/address bus, 8, time-sharing multiplex, the least-significant byte of OPADD bus and input and output 8 bit data, they meet the Pin3 of 74LS373 respectively, Pin4, Pin7, Pin8, Pin13, Pin14, Pin17Pin18 and Pin11～Pin19 of 2764 and 8255 and Pin27～Pin34 on.

Pin40: power supply+5V, all the other pins are unsettled.

74LS373: address latch, when its Pin11 address latch signal was effective, the data on the locking data bus were as 2764 and 8255 address wire, its output Pin2 is connected on the Pin9 of 2764 Pin10 and 8255, Pin5 is connected on the Pin8 of 2764 Pin9 and 8255, Pin6, Pin9, Pin12, Pin15, Pin16, Pin19 are connected on respectively on Pin3～Pin8 of 2764, Pin1 and Pin10 ground connection, Pin20 meets power supply+5V.

2764: memory under program, except data bus and address bus, it also has number control signal, and is as follows:

Pin1 and Pin27, Pin28 meets power supply+5V, Pin20 and Pin14 ground connection, Pin26 unsettled 8255: the expansion I/O mouth, it is except above-mentioned 8 bit data bus, 24 I/O lines, 2 bit address lines, outside 2 reading writing signal lines, also have 4 pins, Pin6 wherein, Pin7, Pin35 ground connection, Pin26 meets power supply+5V.

74LS164: three, delivery outlet, the data of first output and outer computer communication are isolated from the outside by 5 TIL113 photoelectrical couplers.The gear video data of the 2nd, 3 two output transformer is connected on two eight sections charactrons.

Power unit: input 220V AC power, through the transformer step-down, become low-voltage DC after the rectifier bridge rectification, after filtering, voltage stabilizing, become stable+5V power supply after the filtering, the each several part of power circuit board uses.

Claims

1, a kind of transformer gear microcomputer detects treating apparatus automatically, the detection indicator gauge is housed on regulator cubicle, show each substation transformer voltage gear, it is characterized in that: described automatic detection treating apparatus, it has the transformer gear and shows transducing signal acquisition system, 8031 central little process chip, EPROM memory under program, 8255 expansion I/O mouths and eight sections charactron display systems, through input, coding, change that transfer wire connects to form the transformer gear give, display circuit.

2, transformer gear microcomputer as claimed in claim 1 detects treating apparatus automatically, it is characterized in that: the collecting sensor signal system of described automatic detection treating apparatus, it comprises the lead of several switch with mechanical contacts of sensor, article two, lead connect the external sensor common port and+the 5V power supply, the contact switch lead is connected on 8031 1-8 pin respectively, 8255 1-4 pin, 8255 10-25 pin, on 8255 the 37-40 pin, 8031 read 8255 pin data by data bus, the 2764th, deposit the memory of program, 8031 must be by 74LS373 connection could be from 2764 program fetch, three 74LS1614 that are used to export, its first and the connection of outer computer control center, second, the 3rd connects two eight sections charactron display circuits.

3, transformer gear microcomputer detects treating apparatus automatically and it is characterized in that according to claim 1: the photoelectric display circuit of described automatic detection treating apparatus, eight sections charactron display circuits, the three 74LS164 chips that output signal to from 8031 little processing enters, the photoelectric display circuit has five TIL113 coupling chips, external current-limiting resistance and light emitting diode, five output terminals A, B, C, D, E and power ends are exported to the field control cabinet.

4, transformer gear microcomputer as claimed in claim 1 detects treating apparatus automatically, it is characterized in that: the power unit of the automatic detection treating apparatus of description, input ac power is through the transformer step-down, after the rectifier bridge rectification, after filtering, voltage stabilizing, filtering, export stable+5V power supply again.