CN101577183B - Indoor switch state reminder for electric power system - Google Patents
Indoor switch state reminder for electric power system Download PDFInfo
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- CN101577183B CN101577183B CN2009100229611A CN200910022961A CN101577183B CN 101577183 B CN101577183 B CN 101577183B CN 2009100229611 A CN2009100229611 A CN 2009100229611A CN 200910022961 A CN200910022961 A CN 200910022961A CN 101577183 B CN101577183 B CN 101577183B
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Abstract
The invention relates to an indoor switch state reminder for an electric power system. The reminder comprises a plurality of signal collection modules, wherein one signal collection module is connected with a host computer MCU, while other signal collection modules are respectively connected with subordinate computer MCUs of the same number; the subordinate computer MCUs are respectively connected with first CAN bus modules of the same number; the signal collection modules, the subordinate computer MCUs and the first CAN bus modules are of one-to-one correspondence; each first CAN bus module is respectively connected with a second CAN bus module; the second CAN bus modules are connected with the host computer MCU; the host computer MCU and a GSM communication module are connected with a host computer respectively; and the subordinate computer MCUs adopt an AT89S52 single chip, while the host computer MCU adopts a C8051F020 single chip. The indoor switch state reminder can realize real-time monitoring of the state change of a switch in an electric transmission line, thereby avoiding the phenomenon that manual monitoring is not in place when switch state changes.
Description
Technical field
The invention belongs to the power transmission and transforming equipment monitoring technical field, relate to a kind of real-time monitoring device of power transmission and transforming equipment on off state, be specifically related to a kind of indoor switch state reminder for electric power system.
Background technology
In the electric power system, many switches are installed in the devices such as switch cubicle, and wherein the state of any one switch changes and all might cause the fault of electric power system, and after switch is aging, breaking down in the contact, can not know real switching information by Direct observation.Therefore, need the variation of on off state is monitored.Be by artificial constantly inquiry in the past and observe, and obtained the state information of switch, and lacked the means of monitoring in real time, when on off state changed, the manpower monitoring did not put in place, and the monitoring of switch cubicle has just been lost meaning.
Summary of the invention
The purpose of this invention is to provide a kind of electric power system indoor type switch alarm set, can monitor the state variation of switch in real time, avoided on off state to change and monitor the phenomenon that causes power system accident when not in place.
The technical solution adopted in the present invention is, indoor switch state reminder for electric power system, comprise a plurality of switch signal acquisition module, one of them signal acquisition module is connected with main frame MCU, the extension set MCU that remaining signal acquisition module is identical with quantity is connected respectively, the CAN bus module that each extension set MCU is identical with quantity is connected respectively, signal acquisition module, an extension set MCU and a CAN bus module are for corresponding one by one, each CAN bus module is connected with the 2nd CAN bus module respectively, the 2nd CAN bus module is connected with main frame MCU, main frame MCU is connected with host computer with the gsm communication module respectively, extension set MCU adopts the AT89S52 single-chip microcomputer, and main frame MCU adopts the C8051F020 single-chip microcomputer.
Feature of the present invention also is,
Signal acquisition module comprises eight switching circuits, and each switching circuit is connected with the data pre-process circuit respectively, and the data pre-process circuit is connected with extension set MCU or main frame MCU.
The data pre-process circuit comprises numerical value latch, digital comparator and the switch triode circuit that is connected successively, digital comparator is connected with eight switching circuits respectively with the numerical value latch, digital comparator all is connected with the output of numerical value latch with extension set MCU or main frame MCU, and the switch triode circuit is connected with extension set MCU or main frame MCU.
Switching circuit comprises optical coupler, optical coupler adopts TLP521, optical coupler comprises light-emitting diode and phototriode, the negative pole of light-emitting diode is electrically connected with switch, the positive pole of light-emitting diode connects 12V voltage, be in series with resistance R 9 between the positive pole of light-emitting diode and the 12V voltage, the grounded emitter of phototriode, the collector electrode of phototriode connects 5V voltage, be in series with resistance R 11 between phototriode collector electrode and the 5V voltage, the collector electrode of phototriode also is connected with the data pre-process circuit.
The gsm communication module comprises microcontroller, communication engine and the mobile phone card that connects successively, and microcontroller adopts LPC2131, and communication engine adopts GSM network engine TC35i.
Main frame MCU is connected with the gsm communication module by the SP3232 serial ports.
Main frame MCU is connected with host computer by the SP3232 serial ports.
Alarm set of the present invention has following advantage:
1. adopt the gsm communication module, communicate by letter with the related work personnel by wireless network realization system for prompting.
2. select the extension set number according to field condition, can measure the quantity of state of a plurality of switches simultaneously, realized the comparison of state between a plurality of switchgears.Simultaneously, good expandability makes this device can adapt to the needs of on-line monitoring, also can be used for general charged detection.
3. under hyperbaric environment, record the accuracy of signal for the assurance system, taked the hardware anti-interference measure, the height shielding and the high sealing of device have been realized, and have good high temperature resistant, a decay resistance, adopt photoelectric coupled circuit simultaneously, strengthen the interference free performance of system, and can effectively prevent system in case of system halt.
Description of drawings
Fig. 1 is the structural representation of a kind of example of alarm set of the present invention;
Fig. 2 is the structural representation of signal acquisition module in the alarm set of the present invention;
Fig. 3 is the structural representation of switching circuit in the alarm set of the present invention.
Fig. 4 is the structural representation of gsm communication module in the alarm set of the present invention.
Among the figure, 1. signal acquisition module, 2. extension set MCU, a 3. CAN bus module, 4. main frame MCU, 5.GSM communication module, 6. the 2nd CAN bus module, 7. switching circuit, 8. data pre-process circuit unit, 9. optical coupler, 10. host computer.
Wherein, 5-1. microcontroller, 5-2. communication engines, 5-3. mobile phone card, 8-1. digital comparator, 8-2. numerical value latch, 8-3. switch triode circuit, 9-1. light-emitting diode, 9-2. phototriode.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
The structure of alarm set of the present invention, as shown in Figure 1.Comprise a plurality of signal acquisition module 1 (each signal acquisition module comprises 8 identical switching circuits and a data pretreatment unit) that are arranged side by side, one of them signal acquisition module 1 is connected with main frame MCU4, the extension set MCU2 that remaining signal acquisition module 1 is identical with quantity is connected respectively, the CAN bus module 3 that each extension set MCU2 is identical with quantity is connected respectively, signal acquisition module 1, an extension set MCU2 and a CAN bus module 3 form corresponding one by one, each CAN bus module 3 is connected with the 2nd CAN bus module 6 respectively, the 2nd CAN bus module 6 is connected with main frame MCU4, and main frame MCU4 is connected with the MCU and the host computer 10 of gsm communication module 5 respectively by the SP3232 serial ports.
Main frame can connect 31 identical extension sets, and in main frame MCU4 and the signal acquisition module 1 that each extension set MCU2 is connected 8 switching circuits that structure is identical is arranged respectively, so the switch number that this system for prompting can be monitored reaches 256.
Extension set MCU2 adopts the 89S52 single-chip microcomputer, and extension set MCU2 is sent to main frame MCU4 with the on off state variation that monitors by a CAN bus module 3 and the 2nd CAN bus module 6.
Main frame MCU4 adopts the C8051F020 single-chip microcomputer, itself also can monitor 8 way switch, receives the data that the CAN bus is sent simultaneously, will send to gsm module after on off state, switch address and the phone number data preparation then.And by host computer the address of monitored switch and the number that need send to the mobile phone of monitoring information are provided with, switch address is maximum supports 8 Chinese characters, maximumly supports 5 phone numbers.
The one CAN bus module 3 is identical with the structure of the 2nd CAN bus module 6, comprise CAN controller SJA1000 and CAN transceiver isolating chip CTM1050, a CAN bus module 3 and the 2nd CAN bus module 6 are bridges of extension set MCU2 and main frame MCU4 transfer of data.
Main frame MCU4 is connected by the SP3232 serial ports with gsm communication module 5, carries out the conversion of Transistor-Transistor Logic level and 232 level; Main frame MCU4 and host computer also carry out level conversion by SP3232, can use upper computer software according to field condition is provided with switch address and reception phone number, address information and phone number can be stored with serial storage 24C128 that main frame MCU4 links to each other in, power down is not lost.
The structure of signal acquisition module 1 in the system for prompting of the present invention, as shown in Figure 2.Comprise eight switching circuits 7 that are arranged side by side, each switching circuit 7 is connected with data pre-process circuit 8 respectively, and data pre-process circuit 8 is connected with extension set MCU2 or main frame MCU4.Data pre-process circuit 8 comprises digital comparator 8-1, and digital comparator 8-1 is connected with switch triode circuit 8-3 with numerical value latch 8-2 respectively; Digital comparator 8-1 is connected with eight switching circuits 7 respectively with numerical value latch 8-2, and numerical value latch 8-2 is connected with extension set MCU2 or main frame MCU4, and switch triode circuit 8-3 is connected with extension set MCU2 or main frame MCU4.
Eight switching circuits 7 that structure is identical are respectively arranged in each signal acquisition module 1 of this system for prompting, the structure of the switching circuit 7 that is electrically connected with switch " 0 " wherein, as shown in Figure 3.Comprise optical coupler 9, optical coupler 9 adopts TLP521, optical coupler 9 comprises light-emitting diode 9-1 and phototriode 9-2, the negative pole of light-emitting diode 9-1 is electrically connected with switch " 0 ", the positive pole of light-emitting diode 9-1 connects 12V voltage, is in series with resistance R 9 (1K Ω) between the positive pole of light-emitting diode 9-1 and the 12V voltage; The grounded emitter of phototriode 9-2, the collector electrode of phototriode 9-2 connects 5V voltage, be in series with resistance R 11 (10K Ω) between phototriode 9-2 collector electrode and the 5V voltage, the collector electrode of phototriode 9-2 also is connected with data pre-process circuit 8, carry out the output of voltage, will be sent to data pre-process circuit 8 through the switch state signal of exporting after the light-coupled isolation.
Switching circuit 7 carries out light-coupled isolation with the switch state signal that receives to be handled, and the signal after will handling is sent to data pre-process circuit 8.The luminescent device that is used for transmitting the optical coupler 9 of analog signal is that light-emitting diode 9-1, light receiving element are phototriode 9-2.When the signal of telecommunication (switch state signal) of input passes through light-emitting diode 9-1, light-emitting diode 9-1 sends the light of certain wavelength, this irradiate light is to the surface of phototriode 9-2, make phototriode 9-2 produce collector current, the size of this electric current and the power of illumination, that is the size that flows through the forward current of light-emitting diode 9-1 is directly proportional, finish the conversion of electrical-optical-electricity by light-emitting diode 9-1 and phototriode 9-2, in the transfer process of electrical-optical-electricity, make optical coupler 9 play the effect of input-output-isolation.Owing to pass through optical signal transmission between the input of optical coupler 9 and the output, thereby on electric, isolate fully between this input and the output, there are not the feedback and the interference of the signal of telecommunication, so stable performance, antijamming capability is strong.Coupling capacitance little (about 2pf) between Light-Emitting Diode 9-1 and the photosensitive triode 9-2, withstand voltage height (about 2.5KV), so common-mode rejection ratio is very high.The electric isolation of optical coupler 9 inputs and output depends on the insulation resistance between this two ends power supply.Simultaneously, the input resistance of optical coupler 9 is little, and the noise in high internal resistance source is equivalent to by short circuit.Thereby the analog signal buffer circuit that is made of optical coupler 9 has good electric property.
Numerical value latch 8-2 in the data pre-process circuit 8 adopts eight bit data latch 74LS373, and digital comparator 8-1 adopts eight-digit number value comparator 74LS688.Digital comparator 8-1 output links to each other with the external interrupt input of extension set MCU2 or main frame MCU4.Whether digital comparator 8-1 can compare one by one to two 8 character codes, and indicate these two character codes to equate, when numerical value was suitable fully, the output of digital comparator 8-1 was a low level.When on off state changed, two 8 signals of input value comparator 8-1 were incomplete same, and this moment, the level of digital comparator 8-1 output changed, and caused extension set MCU2 or main frame MCU4 external interrupt.
The structure of gsm communication module 5 in the system for prompting of the present invention as shown in Figure 4, comprises microcontroller 5-1, the communication engine 5-2 and the mobile phone card 5-3 that connect successively.Microcontroller 5-1 adopts 32 LPC2131, and communication engine 5-2 adopts GSM network engine TC35i.Mobile phone card 5-3 adopts mobile phone Sim card.
32 8-digit microcontroller LPC2131 are electrically connected with GSM network engine TC35i.Controller LPC2131 not only has arm processor low-power consumption, high performance advantage, has again than resource on the sheet of horn of plenty simultaneously, is applicable to embedded product.Its characteristics are as follows: can programme in the system 8KB RAM of Flash and can programme in application (IAP) in the sheet of (ISP) of integrated Thumb expansion instruction set 32KB has vectorial interrupt control unit; 2 UART, 2 I2C serial line interfaces, 2 SPI serial line interfaces, 2 timers (catching/compare passage for 7), PWM unit can provide nearly 6 PWM outputs, 8 path 10 position ADC, real-time clock RTC, WatchDog Timer WDT, 48 general purpose I/O pins; Cpu clock has crystal oscillator and the interior PLL of sheet in the sheet up to 60MHz.Microcontroller LPC2131 carries out the transmission of AT order and the transmission of data by serial ports.
The key property of GSM network engine TC35i and technical indicator comprise following some: (1) frequency range is double frequency GSM900MHz and GSM1800MHz (phase 2/2+); (2) support data, voice, short message and fax; (3) high integration (54.5mm * 36mm * 3.6mm); (4) quality is 9g; (5) supply voltage is single 3.3V～4.8V voltage; (6) optional baud rate 300bps～115kbps, moving baud rate 4.8～115kbps; (7) current drain: dormant state is 3.5mA, and idle condition is 25mA, and emission state is 300mA (on average), and peak value is 2.5A; (8) temperature range: normal running-20 ℃～+ 55 ℃, deposit-30 ℃～+ 85 ℃; (9) SIM voltage is 3V/1.8V.
GSM network engine TC35i has 40 pins, draws by a ZIF (Zero Insertion Force, zero resistance socket) connector.These 40 pins can be divided into 5 classes, i.e. power supply, data I/O, SIM card, audio interface and control.The 1st～14 pin is a power unit: wherein, 1～5 pin is supply voltage input BATT+, and 6～10 pin are power supply ground GND, 11 and 12 pin are the charging pin, 13 pin are external output voltage (using for external circuit), and 14 pin are BATT TEMP, connect the thermistor of negative temperature coefficient.The 24th～29 pin is the SIM card pin, be respectively CCIN (SIM card has or not detection), CCRST (resetting), CCIO (data), CCCLK (clock), CCVCC (power supply: 2.9V) and CCGND ().The 33rd～40 pin is a speech interface, is used for the handle of answering the call.15th, 30,31 and 32 pin are control section: 15 pin are ignition lead IGT (Ignition), must give low level greater than 100ms of IGT after the TC35i energising, and module just starts; The 30th pin is VDDLP, and the 31st pin is EMERGOFF, and the 32nd pin is SYNC.The 16th～23 pin is the data I/O, is respectively DSR0, RING0, RXD0, TXD0, CTS0, RTS0, DTR0 and DCD0.
The course of work of alarm set of the present invention:
When on off state changes, signal acquisition module 1 is gathered the on off state variable signal from equipment under test, switching signal converts the signal of telecommunication that the MCU single-chip microcomputer is supported to by optical coupler 9, optical coupler 9 carries out light-coupled isolation with the signal that receives, and the signal after will handling is input to the Signal Pretreatment unit, if monitor the variation of state, can cause that the main frame MCU4 or the extension set MCU2 that are connected with this signal acquisition module 1 interrupt, main frame MCU4 or the timely acquired signal of extension set MCU2, the read switch state value.Extension set MCU2 sends the switching value that monitors to main frame MCU4 by a CAN bus module 3 and the 2nd CAN bus module 6; Main frame MCU4 monitors 8 way switch that are attached thereto in the signal acquisition module 1 that connects in real time on the one hand, also receives the on off state that each extension set MCU2 that the 2nd CAN bus module 6 sends monitors simultaneously.Main frame MCU4 reads address information and cellphone information according to switching signal from data storage, and after the data form adjusted, transfer data to the microprocessor 5-1 of gsm communication module 5, microprocessor 5-1 is adjusted into the PDU form with data, and adjusted data are sent to communication engine 5-2 by serial ports, be transferred on related work personnel's the mobile phone of the number that preestablished in the mode of SMS then, the staff in time understands the state information of switch by SMS, provide separately and comprehensively and inquire about, analyze, and can make further improvement system's operation.
Alarm set of the present invention sends the on off state change information that the monitors mode with SMS in real time, make the professional can the current transmission line of real-time judge in the operation conditions of switch.On the one hand the switch in the transmission line is monitored in real time, fully grasp the variation of switch and make corresponding adjustment measure at any time, improve the operational efficiency of power supply unit; But the state change information of comprehensive collection and long-term accumulation switch on the other hand is for the design of transmission line and the operation maintenance of switch cubicle provide basic data.
Claims (7)
1. indoor switch state reminder for electric power system, it is characterized in that, this device comprises a plurality of switch signal acquisition module (1), one of them signal acquisition module (1) is connected with main frame MCU (4), the extension set MCU (2) that remaining signal acquisition module (1) is identical with quantity is connected respectively, the CAN bus module (3) that each extension set MCU (2) is identical with quantity is connected respectively, signal acquisition module (1), an extension set MCU (2) and a CAN bus module (3) are for corresponding one by one, each CAN bus module (3) is connected with the 2nd CAN bus module (6) respectively, the 2nd CAN bus module (6) is connected with main frame MCU (4), main frame MCU (4) is connected with host computer (10) with gsm communication module (5) respectively, extension set MCU (2) adopts the AT89S52 single-chip microcomputer, and main frame MCU (4) adopts the C8051F020 single-chip microcomputer.
2. according to the described alarm set of claim 1, it is characterized in that, described signal acquisition module (1) comprises eight switching circuits (7), and each switching circuit (7) is connected with data pre-process circuit (8) respectively, and data pre-process circuit (8) is connected with extension set MCU (2) or main frame MCU (4).
3. according to the described alarm set of claim 2, it is characterized in that, described data pre-process circuit (8) comprises numerical value latch (8-2), digital comparator (8-1) and the switch triode circuit (8-3) that is connected successively, digital comparator (8-1) is connected with eight switching circuits (7) respectively with numerical value latch (8-2), digital comparator (8-1) all is connected with the output of numerical value latch (8-2) with extension set MCU (2) or main frame MCU (4), and switch triode circuit (8-3) is connected with extension set MCU (2) or main frame MCU (4).
4. according to the described alarm set of claim 2, it is characterized in that, described switching circuit (7) comprises optical coupler (9), optical coupler (9) adopts TLP521, optical coupler (9) comprises light-emitting diode (9-1) and phototriode (9-2), the negative pole of light-emitting diode (9-1) is electrically connected with switch, the positive pole of light-emitting diode (9-1) connects 12V voltage, be in series with resistance R 9 between the positive pole of light-emitting diode (9-1) and the 12V voltage, the grounded emitter of phototriode (9-2), the collector electrode of phototriode (9-2) connects 5V voltage, be in series with resistance R 11 between phototriode (9-2) collector electrode and the 5V voltage, the collector electrode of phototriode (9-2) also is connected with data pre-process circuit (8).
5. according to the described alarm set of claim 1, it is characterized in that, described gsm communication module (5) comprises microcontroller (5-1), communication engine (5-2) and the mobile phone card (5-3) that connects successively, described microcontroller (5-1) adopts LPC2131, and communication engine (5-2) adopts GSM network engine TC35i.
6. according to the described alarm set of claim 1, it is characterized in that described main frame MCU (4) is connected with gsm communication module (5) by the SP3232 serial ports.
7. according to the described alarm set of claim 1, it is characterized in that described main frame MCU (4) is connected with host computer (10) by the SP3232 serial ports.
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| CN113985263A (en) * | 2021-04-27 | 2022-01-28 | 国网河南省电力公司南阳供电公司 | Device for remotely monitoring on-off state of air switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GR1004481B (en) * | 2003-03-13 | 2004-03-11 | Στεφ. Ποθος - Παν. Σαρδης Ο.Ε. | Control system for monitoring medium-voltage sub-station operations via a gsm network |
| CN100338846C (en) * | 2005-06-22 | 2007-09-19 | 肖冬冰 | Countryside low-voltage electric distribution network automatization controlling device and its method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GR1004481B (en) * | 2003-03-13 | 2004-03-11 | Στεφ. Ποθος - Παν. Σαρδης Ο.Ε. | Control system for monitoring medium-voltage sub-station operations via a gsm network |
| CN100338846C (en) * | 2005-06-22 | 2007-09-19 | 肖冬冰 | Countryside low-voltage electric distribution network automatization controlling device and its method |
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Address after: 324100 Zhejiang province Jiangshan City Qing Hu Zhen Village intersection 198-4 junctions Patentee after: Zhejiang era electrical Polytron Technologies Inc Address before: Jiangshan City, Zhejiang province 324100 Quzhou City Road No. 198 Qing Hu Zhen Village intersection Patentee before: ZHEJIANG JIYUAN TRANSFORMER CO., LTD. |
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