CN2775905Y - Microcomputer comprehensive protection detecting and control device - Google Patents
Microcomputer comprehensive protection detecting and control device Download PDFInfo
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- CN2775905Y CN2775905Y CN 200420114081 CN200420114081U CN2775905Y CN 2775905 Y CN2775905 Y CN 2775905Y CN 200420114081 CN200420114081 CN 200420114081 CN 200420114081 U CN200420114081 U CN 200420114081U CN 2775905 Y CN2775905 Y CN 2775905Y
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Abstract
The utility model relates to a measuring and controlling device for an electric power system, particularly a measuring and controlling device for the integrated protection of a microcomputer of a large power motor of the electric power system, which solves the technical problem that the control function of an existing measuring and controlling device is incomprehensive. The utility model has the technical scheme that the measuring and controlling device for the integrated protection of a microcomputer is composed of a power supply, an alternating current board, a controlling main board, an operating board, a remote signaling board and a panel, wherein the controlling main board is provided with a clock IC, a CPU, an RAM, an ROM, an EEPROM, an EPLD, an A/D and an I/D in an insertion and connection way, and is provided with the communication port of a CAN controller, and an RS485 interface; after an alternating current input quantity passes through low pass filtration, the alternating current input quantity is selected by an MUX multiway switch, and then is transmitted to a sampling channel through A/D conversion; the alternating current input quantity passes through a fixed time lag and an inversed time lag control logics, and is transmitted to the CPU and the I/D, and the alternating current input quantity is transmitted to operating board through a write photoisolator; the remote signaling quantity and the remote pulse quantity of the remote signaling board respectively pass through the write photoisolator through I/D conversion, and are input to the CPU; the panel is connected with the controlling main board, the communication port of the CAN controller is coupled in a CAN network and the RS485 interface is coupled in an RS485 network. The utility model is mainly used for the protection and the monitoring of the electric motor with a voltage level of 10KV and 6KV.
Description
Technical field: the utility model relates to a kind of measure and control device of electric power system, particularly the computer integrated protection measure and control device of electric power system high capacity motor.
Background technology: along with the development of production technology, electric power system more and more develops to the comprehensive automation direction.This just requires various second protection equipment to have functions such as protection, measurement, communication, control.But the second protection equipment that present stage uses only has protection and some simple communication functions, only has on the operation time limit defencive function single " specified time " or " inverse time lag " having as existing protective relaying device.Just can't in time provide protection when motor start-up overlong time and emerged in operation stall like this, the motor of stall under full voltage particularly, radiating condition extreme difference, electric current are very big, burn especially easily.
Summary of the invention: the purpose of this utility model provides a kind of computer integrated protection measure and control device, solves the problem of burning that existing measure and control device can't solve the motor of stall.
The technical solution of the utility model is: a kind of computer integrated protection measure and control device; by power supply; exchange plate; control main board; operation panel; remote signalling plate and panel are formed; be plugged with clock IC on the control main board; CPU; RAM; ROM; EEPROM; EPLD; A/D and I/D; control main board is provided with CAN controller PORT COM and RS485 interface; exchange input variable after selecting by the MUX variable connector after the low-pass filtering, deliver to sampling channel through the A/D conversion after " specified time "+" inverse time lag " control logic is delivered to CPU; the I/D conversion value is write light inlet every passing to operation panel, and the remote signalling amount of remote signalling plate and distant pulse are respectively by writing light inlet every importing CPU through the I/D conversion.CAN controller PORT COM inserts the CAN network, and the RS485 interface inserts the RS485 network.The analog input process is: foreign current and voltage,, constitute various protection relays, and calculate various remote measurement amounts after CPU sampling and the digital processing after low pass filter inputs to A-D converter through the isolation transformer isolated variable.Protection is input as Ia, Ib, Ic input with analog quantity, and special measurement CT is input as MIa, MIb, MIc, exchanges plate and also has I
0The zero-sequence current input is protected as zero sequence excess current.Ua, Ub, Uc take from PT, are used for the voltage protection input, also as measuring with the voltage input, calculate P, Q, COS Φ, Kwh, the Kvarh that forms motor with MIa, MIb, MIc simultaneously.The utility model is provided with specified time+inverse time lag control logic; interface of protection analog quantity input " specified time "+" inverse time lag " control logic; the 1# control switch connects control logic one input; three interfaces of this control logic meet time controller T respectively, and the 2# control switch connects two interfaces of control logic.When protection starts, carry out definite-time delay operation earlier, after being finished, definite-time delay operation carries out inverse time-delay operation, and device provides two time definite values for adjusting.The actual act time of protection is T=T
1(the definite-time delay operation time of protection)+T
2(the inverse time-delay operation time of protection) is if for pure specified time, only to need the time inverse time lag fixed value adjusting of this protection be 0 to get final product in protection; Protection in like manner is for the pure inverse time lag, and only needing the fixed value adjusting of specified time is 0 to get final product; Certainly can also adjust protection and exist simultaneously into " specified time "+" inverse time lag ".
The beneficial effects of the utility model are: the utility model is real " four is distant " product because each measurement and control unit of system controlled by computer has possessed protection, measurement, communication, controlled function.And owing to be provided with " specified time "+" inverse time lag " control logic, improved the operation stability of device, when motor starts for a long time and the stall phenomenon occurs, also can avoid burning of motor.The protection precision of device is ± 3%, and certainty of measurement is 0.5 grade.
Description of drawings:
Fig. 1 is the utility model structured flowchart
Fig. 2 is the utility model overcurrent protection structured flowchart
Among the figure: the 1-power supply, 2-exchanges plate, 3-control main board, 4-operation panel, 5-remote signalling plate, 6-panel, 7-clock, 8-CPU, 9-RAM, 10-ROM, 11-EEPROM, 12-EPLD, 13-MUX, 14-A/D, 15-" specified time "+" inverse time lag " control logic, 16-CAN controller, 17-RS485,18-I/D, 19-light is every, 20-filter.
Embodiment: with reference to Fig. 1; a kind of computer integrated protection measure and control device; be to be the protection measure and control device of 10KV or 6KV motor to electric pressure; form by power supply 1, interchange plate 2, control main board 3, operation panel 4, remote signalling plate 5 and panel 6; be plugged with clock IC7, CPU8, RAM9, ROM10, EEPROM11, EPLD12, A/D14 and I/D18 on the control main board 3; control main board is provided with CAN controller 16 PORT COM and RS48517 interface; CAN controller PORT COM inserts the CAN network, and the RS485 interface inserts the RS485 network.Exchange input variable after selecting by the MUX13 variable connector after low pass filter 20 filtering, deliver to sampling channel through the A/D14 conversion after " specified time "+" inverse time lag " control logic 15 is delivered to CPU, the I/D18 conversion value is write light inlet and is passed to operation panel 4 every 19, the remote signalling amount of remote signalling plate 5 and distant pulse respectively by write light inlet every 19 through I/D18 conversion input CPU.Panel 6 is connected with control main board 3.With reference to Fig. 2; when the motor start-up overlong time occurring and the stall situation occurring; " specified time "+" inverse time lag " control logic is carried out overcurrent protection; overcurrent protection finishes at motor start-up, and the back is automatic drops into; if start-up time is long or start in stall takes place, after the overcurrent protection input with no deferred action in tripping operation.Specified time overcurrent value can be adjusted according to locked rotor current.When the II section current ration Iset2 of current protection input Ia, Ib, Ic more than or equal to 1 the time; 1# control switch CB1 (II) is the ON state; II section overcurrent protection drops into; CB1 (II) withdraws from during for OFF; 2# control switch CB2 is the ON state; II section overcurrent protection tripping operation drops into, and CB2 withdraws from during for OFF." specified time "+" inverse time lag " control logic provides specified time and inverse time protection for overcurrent protection, inverse time lag current ration and a specified time current ration shared definite value, i.e. and overcurrent definite value, operate time, value can be adjusted separately.Operate time of protection is T=T
1(specified time time)+T
2(time inverse time lag), after this protection starts, carry out definite-time delay operation earlier, carry out inverse time-delay operation again, be 0 as the specified time definite value, then be the pure inverse time lag, if the inverse time lag definite value is 0, then be pure specified time.Specified time, inverse time protection are thrown and are moved back the shared control word of control i.e. " overcurrent protection ".
Claims (2)
1; a kind of computer integrated protection measure and control device; it is characterized in that: by power supply; exchange plate; control main board; operation panel; remote signalling plate and panel are formed; be plugged with clock IC on the control main board; CPU; RAM; ROM; EEPROM; EPLD; A/D and I/D; control main board is provided with CAN controller PORT COM and RS485 interface; exchange input variable after selecting by the MUX variable connector after the low-pass filtering, deliver to sampling channel through the A/D conversion after " specified time "+" inverse time lag " control logic is delivered to CPU; the I/D conversion value is write light inlet every passing to operation panel; the remote signalling amount of remote signalling plate and distant pulse are respectively by writing light inlet every importing CPU through the I/D conversion; panel is connected with control main board is two-way; CAN controller PORT COM inserts the CAN network, and the RS485 interface inserts the RS485 network.
2, a kind of computer integrated protection measure and control device according to claim 1; it is characterized in that: interface of protection analog quantity input " specified time "+" inverse time lag " control logic; the 1# control switch connects control logic one input; three interfaces of this control logic meet time controller T respectively, and the 2# control switch connects two interfaces of control logic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420114081 CN2775905Y (en) | 2004-12-13 | 2004-12-13 | Microcomputer comprehensive protection detecting and control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420114081 CN2775905Y (en) | 2004-12-13 | 2004-12-13 | Microcomputer comprehensive protection detecting and control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2775905Y true CN2775905Y (en) | 2006-04-26 |
Family
ID=36750220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420114081 Expired - Fee Related CN2775905Y (en) | 2004-12-13 | 2004-12-13 | Microcomputer comprehensive protection detecting and control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2775905Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483612A (en) * | 2014-12-15 | 2015-04-01 | 南京南瑞继保电气有限公司 | Harmonic analysis anti-interference method |
| CN104614616A (en) * | 2015-02-05 | 2015-05-13 | 华北电力科学研究院有限责任公司 | Match detection method and device of generator-transformer unit protection setting value and excitation limiter setting value |
| CN106451389A (en) * | 2016-11-14 | 2017-02-22 | 成都九五测控科技有限公司 | Microcomputer comprehensive measuring and control protection device |
| CN106451387A (en) * | 2016-11-14 | 2017-02-22 | 成都九五测控科技有限公司 | Microcomputer protection, measurement and control device |
| CN106451388A (en) * | 2016-11-14 | 2017-02-22 | 成都九五测控科技有限公司 | Comprehensive type microcomputer protection measurement and control device |
-
2004
- 2004-12-13 CN CN 200420114081 patent/CN2775905Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483612A (en) * | 2014-12-15 | 2015-04-01 | 南京南瑞继保电气有限公司 | Harmonic analysis anti-interference method |
| CN104614616A (en) * | 2015-02-05 | 2015-05-13 | 华北电力科学研究院有限责任公司 | Match detection method and device of generator-transformer unit protection setting value and excitation limiter setting value |
| CN104614616B (en) * | 2015-02-05 | 2017-05-03 | 华北电力科学研究院有限责任公司 | Match detection method and device of generator-transformer unit protection setting value and excitation limiter setting value |
| CN106451389A (en) * | 2016-11-14 | 2017-02-22 | 成都九五测控科技有限公司 | Microcomputer comprehensive measuring and control protection device |
| CN106451387A (en) * | 2016-11-14 | 2017-02-22 | 成都九五测控科技有限公司 | Microcomputer protection, measurement and control device |
| CN106451388A (en) * | 2016-11-14 | 2017-02-22 | 成都九五测控科技有限公司 | Comprehensive type microcomputer protection measurement and control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |