CN201789339U - Substation operational data monitoring and warning system - Google Patents
Substation operational data monitoring and warning system Download PDFInfo
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- CN201789339U CN201789339U CN2010202568276U CN201020256827U CN201789339U CN 201789339 U CN201789339 U CN 201789339U CN 2010202568276 U CN2010202568276 U CN 2010202568276U CN 201020256827 U CN201020256827 U CN 201020256827U CN 201789339 U CN201789339 U CN 201789339U
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Abstract
The utility model relates to a substation operational data monitoring and warning system, which is fine in real-time property and high in intelligence and has a remote detection function. The substation operational data monitoring and warning system comprises information acquirers installed at substations for acquiring various operation data of the substations, information collectors installed at the substations and connected with the information acquirers, operation maintenance servers and duty computer terminals, wherein the operation maintenance servers are in communication connection with the information collectors of the substations through a wireless communication network, and the operation maintenance servers are in communication connection with the duty computer terminals through internet. The substation operational data monitoring and warning system carries out warning, failure analysis and electricity statistic through the wireless network, serves for multiple purposes, reduces failure maintenance time, favors power dispatching, and increases power supply quality.
Description
Technical field
The utility model relates to field of electrical equipment, and in particular, the utility model is a kind of substation operation data monitoring and the warning system about the power equipment automatic management.
Background technology
At present, traditional transformer station adopts special messenger's mode on duty or that regularly patrol and examine to carry out the scene supervision, has poor, the no remote detection function of real-time; In case break down or other abnormal conditions, can't respond the very first time.Along with the development of telecommunication technology and automatic management technology, running status, service data, the failure condition of each transformer station carried out centralized detecting, centralized maintenance by wireless network; A spot of investment just can improve each substation operation reliability greatly, shortens fault time.
Patent Office of the People's Republic of China discloses a CN101030710A document on September 5th, 2007, name is called multifunctional monitoring system of substation in zone, this system is with antitheft, fire, SF6 gas, oxygen, the transformer overtemperature, the cable over-temperature sensor is connected with signal amplification unit respectively, signal amplification unit is connected with the A/D converting unit, the A/D converting unit is connected with the little processing of master control CPU, the little processing of master control CPU respectively with ram memory cell, the voice module unit, display unit, the blower fan control unit, GSM, GPRS mobile module unit connects, the voice module unit is connected with power amplifier unit, and display unit is connected with LCD display; System carries out remote alarms and remote control by GSM, GPRS wireless communication networks; In addition, data all can be passed through GSM, the teletransmission of GPRS communication network and give host computer, by a station terminal main frame of a plurality of sub-districts are carried out the wireless networking monitoring.The shortcoming of this system is the fault of the electric power system in the transformer station itself not to be detected and report to the police, and this is the most frequent generation and needs most the content that detects and report to the police.
Summary of the invention
The utility model for solve the shortcoming that service data of electric power system in the transformer station and fault is not detected and report to the police that exists in the prior art provide a kind of real-time good, have remote detection function, substation operation data monitoring and a warning system that intelligent degree is high.
The technical scheme that its technical problem that solves the utility model adopts is: the utility model comprise be installed in each transformer station in order to the information acquisition device of the various service datas of gathering each transformer station, be installed in each transformer station and the information aggregator that links to each other with information acquisition device, operation and maintenance server, duty computer terminal, operation and maintenance server carries out communication with the information aggregator of each transformer station by the wireless telecommunications net and is connected; Operation and maintenance server is connected by internet communication with the duty computer terminal, information acquisition device comprises input channel, MCU central data treatment circuit, data storage circuitry, 485 communicating circuits, output circuit, and the input of input channel is connected with three-phase voltage signal, the three-phase current signal of transformer station major loop monitoring point; The output of input channel is connected with MCU central data treatment circuit, output circuit respectively; Data storage circuitry is connected with MCU central data treatment circuit; 485 communicating circuits are connected with MCU central data treatment circuit.Information acquisition device is installed on each monitoring point in the transformer station; Information aggregator is arranged in the arbitrary position of transformer station, is the stability of guaranteeing to transmit, and information aggregator adopts 485 communication modes to be connected with information acquisition device, also can adopt wireless or the carrier format connection; Operation and maintenance server is arranged in the place of network insertion; Operation and maintenance server adopts wireless public information network to be connected with information aggregator, also can adopt wired public information network to connect; Operation and maintenance server also is connected with the Internet; The duty computer terminal arrangement is in arbitrary place that Internet is arranged; Information acquisition device is gathered the fault status information and the service data of electric power system, send to information aggregator after gathering, information acquisition device passes through signals sampling, analyze, handle, storage, communication can gather following data to manifold: the meritorious total electric energy of (current) combination, (current) forward total electric energy of gaining merit, (current) oppositely meritorious total electric energy, (current) combination idle 1 total electric energy, (current) A phase forward active energy, (current) A is on the contrary to active energy, combined idle 1 electric energy of (current) A, (current) B phase forward active energy, (current) B is on the contrary to active energy, combined idle 1 electric energy of (current) B, (current) C phase forward active energy, (current) C is on the contrary to active energy, combined idle 1 electric energy of (current) C, the A phase voltage, the B phase voltage, the C phase voltage, the A phase current, the B phase current, the C phase current, instantaneous total active power, instantaneous A phase active power, instantaneous B phase active power, instantaneous C phase active power, instantaneous total reactive power, instantaneous A phase reactive power, instantaneous B phase reactive power, instantaneous C phase reactive power, instantaneous total apparent power, instantaneous A phase apparent power, instantaneous B phase apparent power, instantaneous C phase apparent power, total power factor, A phase power factor, B phase power factor, C phase power factor, A phase phase angle, B phase phase angle, C phase phase angle, mains frequency, mailing address, the ammeter constant of gaining merit, the idle constant of ammeter, ammeter running status digital data piece, meritorious compound mode tagged word, idle compound mode 1 tagged word; Information aggregator is sent to operation and maintenance server with information, operation and maintenance server with the information that each transformer station sends preserve, statistical analysis and form; By the Internet fault message is sent to the duty computer terminal when fault takes place, the operator on duty sends maintenance instruction according to fault message; By this system, also can carry out online fault detect to each unwatched transformer station, when transformer station breaks down, can in time make a response to fault, reduced the Breakdown Maintenance time, improved power supply quality.
As preferably, input channel has two, the input of two input channels connects with three-phase voltage signal, the three-phase current signal of two different main circuit power supplies monitoring points respectively, and the output of two input channels is connected with MCU central data treatment circuit, output circuit respectively.Because all there are two major loops in most of transformer stations, and the detection requirement that two input channels can satisfy most of transformer station is set in system, can make things convenient for wiring like this and reduce equipment cost.
As preferably, input channel comprises input circuit, sample circuit, quantitative analysis circuit, and the input of input circuit is connected with monitoring point three-phase voltage signal, three-phase current signal; The output of input circuit is connected with the input of sample circuit; The output of sample circuit is connected with the input of quantitative analysis circuit, and the output of quantitative analysis circuit is connected with MCU central data treatment circuit, output circuit.In input channel, input circuit becomes the sample circuit acceptable signal of telecommunication to sample the forceful electric power conversion of signals of test point three-phase voltage, three-phase current, and especially current signal must be through the conversion of input circuit; Being transported to the quantitative analysis circuit again through the signal of telecommunication of sample circuit collection handles and can obtain a large amount of useful major loop operation informations.
As preferably, input circuit comprises 3 current transformers, 3 live wires that link to each other with the major loop three-phase voltage, 1 voltage zero line that links to each other with ground; The first side winding of 3 current transformers links to each other with the current circuit of major loop.Current transformer is the most frequently used current signal conversion equipment, the big current signal of major loop can be converted to the little current signal of sample circuit acceptable, the line voltage of useful present most of transformer station major loop is 380V, sample circuit can be accepted, therefore use 3 live wires and 1 ground wire input circuit simply as voltage signal, if voltage is high again, also can adopt voltage transformer as the voltage signal conversion equipment.
As preferably, sample circuit comprises current sampling circuit and voltage sampling circuit, current sampling circuit comprises resistance R 23, R18, R17, R5, R24, R20, R19, R10, R25, R22, R21, R15, capacitor C 19, C5, C26, C27, C20, C6, C29, C30, C28, C7, C31, C32, resistance R 23 and the secondary side winding two ends that are connected across the A phase current mutual inductor after R18 connects, resistance R 17, capacitor C 19, C5, after being connected in series successively, resistance R 5 also is connected across the secondary side winding two ends of A phase current mutual inductor, capacitor C 26, end after the C27 parallel connection is connected on the tie point of resistance R 17 and capacitor C 19, capacitor C 26, the other end after the C27 parallel connection is connected on the tie point of resistance R 5 and capacitor C 5; Resistance R 24 and the secondary side winding two ends that are connected across the B phase current mutual inductor after R20 connects, after being connected in series successively, resistance R 19, capacitor C 20, C6, resistance R 10 also be connected across the secondary side winding two ends of B phase current mutual inductor, end after capacitor C 29, the C30 parallel connection is connected on the tie point of resistance R 19 and capacitor C 20, and the other end after capacitor C 29, the C30 parallel connection is connected on the tie point of resistance R 10 and capacitor C 6; Resistance R 25 and the secondary side winding two ends that are connected across the C phase current mutual inductor after R22 connects, resistance R 21, capacitor C 28, C7, after being connected in series successively, resistance R 15 also is connected across the secondary side winding two ends of C phase current mutual inductor, capacitor C 31, end after the C32 parallel connection is connected on the tie point of resistance R 21 and capacitor C 28, capacitor C 31, the other end after the C32 parallel connection is connected on the tie point of resistance R 15 and capacitor C 7, the tie point of capacitor C 19 and C5, capacitor C 20, the tie point of C6, capacitor C 28, the tie point of C7 also links to each other with ground respectively, resistance R 23, the tie point of R18, resistance R 24, the tie point of R20, resistance R 25, the tie point of R22 also links to each other capacitor C 27 respectively with reference to ground, C30, the two ends of C32 also are connected with the input of quantitative analysis circuit respectively; Voltage sampling circuit comprises resistance R A1, RA2, RA3, RA4, RA5, RA6, R4, RB1, RB2, RB3, RB4, RB5, RB6, R9, RC1, RC2, RC3, RC4, RC5, RC6, R14, capacitor C 1, C2, C3, the end of resistance R A1 links to each other with the A phase firewire, the other end of resistance R A1 and resistance R A2, RA3, RA4, RA5, after being connected in series successively, RA6 is connected with the input of quantitative analysis circuit, the end that resistance R A6 is connected with the input of quantitative analysis circuit also connects an end of resistance R 4 and an end of capacitor C 1, the other end of resistance R 4 links to each other with reference ground, the other end of capacitor C 1 links to each other with ground, the end of resistance R B1 links to each other with the B phase firewire, the other end of resistance R B1 and resistance R B2, RB3, RB4, RB5, after being connected in series successively, RB6 is connected with the input of quantitative analysis circuit, the end that resistance R B6 is connected with the input of quantitative analysis circuit also connects an end of resistance R 9 and an end of capacitor C 2, the other end of resistance R 9 links to each other with reference ground, the other end of capacitor C 2 links to each other with ground, the end of resistance R C1 links to each other with the C phase firewire, the other end of resistance R C1 and resistance R C2, RC3, RC4, RC5, after being connected in series successively, RC6 is connected with the input of quantitative analysis circuit, the end that resistance R C6 is connected with the input of quantitative analysis circuit also connects an end of resistance R 14 and an end of capacitor C 3, the other end of resistance R 14 links to each other with reference ground, and the other end of capacitor C 3 links to each other with ground.Current sampling circuit is changed by differential mode, the current signal of current transformer (CT) input is transformed into the differential mode voltage signal, offer the quantitative analysis circuit, with A is example mutually, the ac current signal of CT output, through two pull down resistors of R23, R18, two current-limiting resistances of R17, R5 obtain the voltage difference mode signal of A phase current, C5, C19, C26, C27 are decoupling capacitor, play the effect of filtering; Voltage sampling circuit adopts the mode of live wire step-down to obtain signal, be example mutually with A equally, live wire access port process RA1, RA2, RA3, RA4,6 divider resistances such as RA5, RA6, and, obtain the differential mode voltage signal of A phase voltage by the R4 pull down resistor; The advantage of differential mode voltage signal is that temperature drift is little, and certainty of measurement is higher.
As preferably, the quantitative analysis circuit comprises special-purpose computation chip of ATT7022 type three-phase electric energy and peripheral circuit.The special-purpose computation chip of ATT7022 is produced by huge spring photoelectricity science and technology, ATT7022 is the special-purpose computation chip of a high accuracy three-phase electric energy, be applicable to phase three-wire three and three-phase four-wire system loop, the integrated circuit such as Digital Signal Processing of six road second order sigma-delta ADC, reference voltage circuit and all power, energy, effective value, power factor and frequency measurement; Active power, reactive power, apparent power, meritorious energy and the quadergy that can measure each phase and close phase, go back parameters such as each phase current of energy measurement, voltage effective value, power factor, phase angle, frequency simultaneously, ATT7022 provides a SPI interface, carries out the transmission of measuring parameter and calibration parameter between convenience and the outside MCU; The external red LED light-emitting diode of ATT7022B is added to certain value as electric energy and sends a pulse, and LED flash is once exported a pulse simultaneously to MCU, carries out the calculating of electric weight for MCU.
As preferably, MCU central data treatment circuit comprises R5R0C028FA type single-chip microcomputer and peripheral circuit.The R5R0C028FA type single-chip microcomputer that Japan Renesas produces, the single-chip microcomputer that adopts high-performance Si-gate CMOS technology and load R8C CPU kernel, be packaged in 52 pin mold LQFP, the existing high function command of this single-chip microcomputer has the high efficiency instruction again, and has the address space of 1M byte and the ability that executes instruction at a high speed.In 64K byte ROM is arranged, 2K byte RAM; The main function of MCU central data treatment circuit is, with the transfer of data of quantitative analysis circuit and the processing of data, the transfer of data with data storage circuitry, the transfer of data with 485 communicating circuits, the control of indicator light.
As preferably, data storage circuitry comprises AT24C32 storage chip and peripheral circuit.In order to guarantee reliability of data storage, the AT24C32 storage chip that adopts atmel corp is in order to the storage critical data, AT24C32 is a 32K Bits Serial CMOS E2PROM, 4096 octets are contained in inside, this device is operated by the I2C bus interface, and a special write-protect function is arranged; MCU central data treatment circuit is with the meritorious total electric energy of (current) combination, (current) forward total electric energy of gaining merit, (current) oppositely meritorious total electric energy, (current) combination idle 1 total electric energy, (current) A phase forward active energy, (current) A is on the contrary to active energy, combined idle 1 electric energy of (current) A, (current) B phase forward active energy, (current) B is on the contrary to active energy, combined idle 1 electric energy of (current) B, (current) C phase forward active energy, (current) C is on the contrary to active energy, combined idle 1 electric energy of (current) C, mailing address, the ammeter constant of gaining merit, the idle constant of ammeter, ammeter running status digital data piece, meritorious compound mode tagged word, data in real time such as idle compound mode 1 tagged word are operated the EEPROM that deposits in the AT24C32 storage chip by I2C.
As preferably, 485 communicating circuits comprise MAX3085 chip and peripheral circuit.The MAX3085 chip is produced by Maxim company, and it is+the RS-4852 transceiver of 5.0V power supply, have ± 15kV esd protection, comprise one road driver and No. one receiver, be used for half-duplex operation.
As preferably, output circuit comprises LED 1, LED2, optocoupler N1, N2, resistance R 42, R2, the positive pole of LED 1 is connected with the quantitative analysis circuit, the negative pole of LED1 links to each other with optocoupler N1 input anode, the N1 input cathode links to each other with ground by resistance R 42, the N1 output links to each other with meritorious calibration stage body, the positive pole of LED 2 is connected with the quantitative analysis circuit, the negative pole of LED2 links to each other with optocoupler N2 input anode, the N2 input cathode links to each other with ground by resistance R 2, and the N2 output links to each other with idle calibration stage body.Because native system has function of measuring, electric energy metrical there is required precision, so need carry out adjustment to the measuring accuracy of equipment, idle calibration pulse output is carried out in the gain merit calibration pulse output, N2 output of N1 output, in meritorious calibration stage body, idle calibration stage body with standard source carry out error ratio to and calibrate.
The beneficial effects of the utility model are: the real time data and the fault message that detect each transformer station's test point operation automatically, and has a function of measuring, amount of information is abundant, certainty of measurement greatly improves, by wireless network report to the police, accident analysis, electric weight statistics, a tractor serves several purposes has reduced the Breakdown Maintenance time, help the electric energy scheduling, improved power supply quality.
Description of drawings
Fig. 1 is a kind of system block diagram of the utility model substation operation data monitoring and warning system;
Fig. 2 is a kind of theory diagram of input channel;
Fig. 3 is a kind of circuit diagram of current sampling circuit;
Fig. 4 is a kind of circuit diagram of voltage sampling circuit;
Fig. 5 is a kind of circuit diagram of quantitative analysis circuit;
Fig. 6 is a kind of circuit diagram of MCU central data treatment circuit;
Fig. 7 is a kind of circuit diagram of data storage circuitry;
Fig. 8 is a kind of circuit diagram of 485 communicating circuits;
Fig. 9 is a kind of circuit diagram of output circuit.
Among the figure: 1. input channel, 2. MCU central data treatment circuit, 3. data storage circuitry, 4. 485 communicating circuits, 5. output circuit, 6. information aggregator, 7. information acquisition device, 8. transformer station, 9. wireless telecommunications net, 10. operation and maintenance server, 11. the duty computer terminal, 12. input circuits, 13. current sampling circuits, 14. voltage sampling circuit, 15. quantitative analysis circuit.
Embodiment
Below by specific embodiment, and in conjunction with the accompanying drawings the technical solution of the utility model is described in further detail.
Embodiment:
The substation operation data monitoring and the warning system of present embodiment, referring to Fig. 1, comprise the information acquisition device 7 that is installed in the transformer station 8, information aggregator 6, be installed in the operation and maintenance server 10 at system call center, duty computer terminal 11, supply line's major loop in the input of information acquisition device 7 and the transformer station 8 links to each other, the output of information acquisition device 7 links to each other with the input of information aggregator 6, the output of information aggregator 6 links to each other with operation and maintenance server 10 by public radio communication net 9, and operation and maintenance server 10 links to each other with duty computer terminal 11 by the Internet.Information acquisition device 7 comprises two input channels 1, MCU central data treatment circuit 2, data storage circuitry 3,485 communicating circuits 4, output circuit 5, the input of two input channels 1 is continuous with different supply line's major loops respectively, the output of two input channels 1 links to each other with MCU central data treatment circuit 2, output circuit 5 respectively, MCU central data treatment circuit 2 also links to each other with data storage circuitry 3,485 communicating circuits 4, and 485 communicating circuits 4 link to each other with information aggregator 6.
Referring to Fig. 2, input channel 1 comprises input circuit 12, current sampling circuit 13, voltage sampling circuit 14, quantitative analysis circuit 15, the input of input circuit 12 links to each other with the supply line major loop, the output of input circuit 12 links to each other with the input of current sampling circuit 13, voltage sampling circuit 14 respectively, and the output of current sampling circuit 13, voltage sampling circuit 14 links to each other with quantitative analysis circuit 15 respectively.
Referring to Fig. 4, voltage sampling circuit 14 links to each other with the major loop three-phase voltage by 3 live wires of input circuit 12, voltage sampling circuit 14 comprises resistance R A1, RA2, RA3, RA4, RA5, RA6, R4, RB1, RB2, RB3, RB4, RB5, RB6, R9, RC1, RC2, RC3, RC4, RC5, RC6, R14, capacitor C 1, C2, C3, the end of resistance R A1 links to each other with the A phase firewire, the other end of resistance R A1 and resistance R A2, RA3, RA4, RA5, after being connected in series successively, RA6 is connected with the input of quantitative analysis circuit 15, the end that resistance R A6 is connected with the input of quantitative analysis circuit 15 also connects an end of resistance R 4 and an end of capacitor C 1, the other end of resistance R 4 links to each other with reference ground (REFO), the other end of capacitor C 1 links to each other with ground, the end of resistance R B1 links to each other with the B phase firewire, the other end of resistance R B1 and resistance R B2, RB3, RB4, RB5, after being connected in series successively, RB6 is connected with the input of quantitative analysis circuit 16, the end that resistance R B6 is connected with the input of quantitative analysis circuit 15 also connects an end of resistance R 9 and an end of capacitor C 2, the other end of resistance R 9 links to each other with reference ground (REFO), the other end of capacitor C 2 links to each other with ground, the end of resistance R C1 links to each other with the C phase firewire, the other end of resistance R C1 and resistance R C2, RC3, RC4, RC5, after being connected in series successively, RC6 is connected with the input of quantitative analysis circuit 15, the end that resistance R C6 is connected with the input of quantitative analysis circuit 15 also connects an end of resistance R 14 and an end of capacitor C 3, the other end of resistance R 14 links to each other with reference ground (REFO), and the other end of capacitor C 3 links to each other with ground.
Referring to Fig. 5, quantitative analysis circuit 15 comprises special-purpose computation chip of ATT7022 type three-phase electric energy and peripheral circuit, 3,4,6,7,8,9 pin of the special-purpose computation chip of ATT7022 type three-phase electric energy link to each other with current sampling circuit 13 respectively, 13,16,19 pin of the special-purpose computation chip of ATT7022 type three-phase electric energy link to each other with voltage sampling circuit 14 respectively, 27,28 pin of the special-purpose computation chip of ATT7022 type three-phase electric energy link to each other with output circuit 5, and 35,36,37,38 pin of the special-purpose computation chip of ATT7022 type three-phase electric energy link to each other with MCU central data treatment circuit 2 respectively.
Referring to Fig. 6, MCU central data treatment circuit 2 comprises R5R0C028FA type single-chip microcomputer and peripheral circuit, R5R0C028FA type single- chip microcomputer 17,18,19,20 pin link to each other with quantitative analysis circuit 15 respectively, R5R0C028FA type single-chip microcomputer 3 pin link to each other with data storage circuitry 3, and R5R0C028FA type monolithic under-chassis links to each other with 485 communicating circuits 4.
Referring to Fig. 7, data storage circuitry 3 comprises AT24C32 storage chip and peripheral circuit, and AT24C32 storage chip 5 pin link to each other with R5R0C028FA type single-chip microcomputer.
Referring to Fig. 8,485 communicating circuits 4 comprise MAX3085 chip and peripheral circuit, and MAX3085 chip 1 pin 2 pin 3 pin link to each other with MCU central data treatment circuit 2 through after the light-coupled isolation, and MAX3085 chip 6 pin 7 pin link to each other with information aggregator 6.
Referring to Fig. 9, output circuit 5 comprises LED 1, LED2, optocoupler N1, N2, resistance R 42, R2, the positive pole of LED 1 is connected with quantitative analysis circuit 15, the negative pole of LED1 links to each other with optocoupler N1 input anode, the N1 input cathode links to each other with ground by resistance R 42, the N1 output links to each other with meritorious calibration stage body, the positive pole of LED 2 is connected with quantitative analysis circuit 15, the negative pole of LED2 links to each other with optocoupler N2 input anode, the N2 input cathode links to each other with ground by resistance R 2, and the N2 output links to each other with idle calibration stage body.
In the present embodiment, current transformer changes each phase current of 80A into the 40mA electric current.
The active power of each phase is by to going electric current, voltage signal after the DC component to carry out obtaining after a series of Digital Signal Processing such as multiplication, addition, digital filtering:
Meritorious energy obtains by the integration of instantaneous active power to the time;
The wattless power meter quantity algorithm is after voltage signal employing phase shift 90 is spent with meritorious similar;
Quadergy obtains by the integration of instantaneous reactive power to the time;
Voltage effective value by the voltage sample value is carried out square, a series of computings such as evolution and digital filtering obtain;
Current effective value by current sampling data is carried out square, a series of computings such as evolution and digital filtering obtain;
ATT7022B can the direct voltage output frequency parameter, and it is the benchmark that electric voltage frequency is measured that ATT7022 can select any phase voltage in the A/B/C three-phase automatically.Measurable pressure-wire frequency range is 10Hz ~ 500Hz.
Simultaneously, the external red LED light-emitting diode of ATT7022 (LED1), when electric energy was added to a pulse, LED1 glimmered once, and the SEL pin is also exported a pulse to MCU simultaneously, carries out the calculating of electric weight for MCU.
MCU central data treatment circuit 2 adopts a kind of communication modes that is SPI with the transfer of data of quantitative analysis circuit 15 and the communication of the processing of data: MCU and computation chip ATT7022; The inner integrated SPI serial communication interface of ATT7022, the SPI interface of ATT7022 adopts slave mode work, uses 2 control lines and 2 data wire: CS, SCLK, DIN and DOUT.
CS: sheet choosing (input pin), the control line of permission visit serial ports.CS represents SPI operation beginning when becoming low level by high level, CS represents the SPI EO when becoming high level by low level; So when operating SPI at every turn CS must occur trailing edge ↓, CS rising edge ↑ time occurs and represents the SPI EO.
DIN: serial data input (input pin) is used for user's data (as data/command etc.) is transferred to ATT7022.
DOUT: serial data output (output pin) is used for reading data from the ATT7022 register.
SCLK: serial clock (input pin), control data shifts out or moves into the transfer rate of serial port.Rising edge is put data, trailing edge fetch data SCLK trailing edge ↓ time with the data sampling on the DIN in ATT7022, SCLK rises ↑ along the time data of ATT7022 be positioned over DOUT go up output.
By the aforesaid operations mode, MCU can obtain the relevant data of all required in ATT7022 electric energy, and according to these data, MCU carries out a series of processing, comprises the calculating of closing the phase electric weight, the calculating of each phase-splitting electric weight, the storage of various electric current and voltage data.
The MAX3085 chip that Maxim company in 485 communicating circuits 4 produces, it by+5.0V power supply, have ± the RS-4852 transceiver of 15kV esd protection, comprise one road driver and No. one receiver; Be used for half-duplex operation; AA, BB are communication bus, and TVS1 and TVS2 are two TVS pipes, and purpose is that 485 chips are carried out the ESD protection; Consider that for electrical security the power supply of 485 communication parts must be realized electrical isolation with input circuit 12, current sampling circuit 13, voltage sampling circuit 14, quantitative analysis circuit 15, MCU central data treatment circuit 2, data storage circuitry 3; Use OPT1, two optocouplers of OPT2 are realized the effect of isolation.
Because the native system class has a function of measuring, thus electric energy metrical there is required precision, so need carry out adjustment to the measuring accuracy of equipment; Output circuit 5 has two delivery outlet: P+, P-and WG+, WG-, P+, P-connect meritorious calibration pulse output, WG+, WG-connect idle calibration pulse output, the meritorious calibration pulse output of P+, P-is exactly that error information with the equipment collection exports the calibration stage body to, and with the standard source of calibration stage body carry out error ratio to and calibration; In order to guarantee electrical safety, calibration pulse output also must be carried out electrical isolation, and is same, also is the mode that adopts light-coupled isolation.N1 is meritorious calibration pulse output optocoupler, and N2 is idle calibration pulse output optocoupler.
Above embodiment is one of preferred plan of the present utility model, is not that the utility model is done any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim puts down in writing.
Claims (10)
1. substation operation data monitoring and warning system, comprise be installed in each transformer station in order to the information acquisition device of the various service datas of gathering each transformer station, be installed in each transformer station and the information aggregator that links to each other with information acquisition device, operation and maintenance server, duty computer terminal, operation and maintenance server carries out communication with the information aggregator of each transformer station by the wireless telecommunications net and is connected; Described operation and maintenance server is connected by internet communication with described duty computer terminal, it is characterized in that: described information acquisition device comprises input channel, MCU central data treatment circuit, data storage circuitry, 485 communicating circuits, output circuit, and the input of described input channel is connected with three-phase voltage signal, the three-phase current signal of transformer station major loop monitoring point; The output of input channel is connected with MCU central data treatment circuit, output circuit respectively; Data storage circuitry is connected with MCU central data treatment circuit; 485 communicating circuits are connected with MCU central data treatment circuit.
2. substation operation data monitoring according to claim 1 and warning system, it is characterized in that: described input channel has two, the input of described two input channels connects with three-phase voltage signal, the three-phase current signal of two different main circuit power supplies monitoring points respectively, and the output of described two input channels is connected with MCU central data treatment circuit, output circuit respectively.
3. substation operation data monitoring according to claim 1 and 2 and warning system, it is characterized in that: described input channel comprises input circuit, sample circuit, quantitative analysis circuit, and the input of input circuit is connected with monitoring point three-phase voltage signal, three-phase current signal; The output of input circuit is connected with the input of sample circuit; The output of sample circuit is connected with the input of quantitative analysis circuit, and the output of quantitative analysis circuit is connected with MCU central data treatment circuit, output circuit.
4. substation operation data monitoring according to claim 3 and warning system is characterized in that: described input circuit comprises 3 current transformers, 3 live wires that link to each other with the major loop three-phase voltage, 1 voltage zero line that links to each other with ground; The first side winding of described 3 current transformers links to each other with the current circuit of major loop.
5. substation operation data monitoring according to claim 3 and warning system, it is characterized in that: described sample circuit comprises current sampling circuit and voltage sampling circuit, described current sampling circuit comprises resistance R 23, R18, R17, R5, R24, R20, R19, R10, R25, R22, R21, R15, capacitor C 19, C5, C26, C27, C20, C6, C29, C30, C28, C7, C31, C32, described resistance R 23 and the secondary side winding two ends that are connected across the A phase current mutual inductor after R18 connects, resistance R 17, capacitor C 19, C5, after being connected in series successively, resistance R 5 also is connected across the secondary side winding two ends of A phase current mutual inductor, capacitor C 26, end after the C27 parallel connection is connected on the tie point of resistance R 17 and capacitor C 19, capacitor C 26, the other end after the C27 parallel connection is connected on the tie point of resistance R 5 and capacitor C 5; Described resistance R 24 and the secondary side winding two ends that are connected across the B phase current mutual inductor after R20 connects, after being connected in series successively, resistance R 19, capacitor C 20, C6, resistance R 10 also be connected across the secondary side winding two ends of B phase current mutual inductor, end after capacitor C 29, the C30 parallel connection is connected on the tie point of resistance R 19 and capacitor C 20, and the other end after capacitor C 29, the C30 parallel connection is connected on the tie point of resistance R 10 and capacitor C 6; Described resistance R 25 and the secondary side winding two ends that are connected across the C phase current mutual inductor after R22 connects, resistance R 21, capacitor C 28, C7, after being connected in series successively, resistance R 15 also is connected across the secondary side winding two ends of C phase current mutual inductor, capacitor C 31, end after the C32 parallel connection is connected on the tie point of resistance R 21 and capacitor C 28, capacitor C 31, the other end after the C32 parallel connection is connected on the tie point of resistance R 15 and capacitor C 7, the tie point of described capacitor C 19 and C5, capacitor C 20, the tie point of C6, capacitor C 28, the tie point of C7 also links to each other with ground respectively, described resistance R 23, the tie point of R18, resistance R 24, the tie point of R20, resistance R 25, the tie point of R22 also links to each other described capacitor C 27 respectively with reference to ground, C30, the two ends of C32 also are connected with the input of quantitative analysis circuit respectively; Described voltage sampling circuit comprises resistance R A1, RA2, RA3, RA4, RA5, RA6, R4, RB1, RB2, RB3, RB4, RB5, RB6, R9, RC1, RC2, RC3, RC4, RC5, RC6, R14, capacitor C 1, C2, C3, the end of described resistance R A1 links to each other with described A phase firewire, the other end of resistance R A1 and resistance R A2, RA3, RA4, RA5, after being connected in series successively, RA6 is connected with the input of quantitative analysis circuit, the end that described resistance R A6 is connected with the input of quantitative analysis circuit also connects an end of resistance R 4 and an end of capacitor C 1, the other end of described resistance R 4 links to each other with reference ground, the other end of described capacitor C 1 links to each other with ground, the end of described resistance R B1 links to each other with described B phase firewire, the other end of resistance R B1 and resistance R B2, RB3, RB4, RB5, after being connected in series successively, RB6 is connected with the input of quantitative analysis circuit, the end that described resistance R B6 is connected with the input of quantitative analysis circuit also connects an end of resistance R 9 and an end of capacitor C 2, the other end of described resistance R 9 links to each other with reference ground, the other end of described capacitor C 2 links to each other with ground, the end of described resistance R C1 links to each other with described C phase firewire, the other end of resistance R C1 and resistance R C2, RC3, RC4, RC5, after being connected in series successively, RC6 is connected with the input of quantitative analysis circuit, the end that described resistance R C6 is connected with the input of quantitative analysis circuit also connects an end of resistance R 14 and an end of capacitor C 3, the other end of described resistance R 14 links to each other with reference ground, and the other end of described capacitor C 3 links to each other with ground.
6. substation operation data monitoring according to claim 3 and warning system is characterized in that: described quantitative analysis circuit comprises special-purpose computation chip of ATT7022 type three-phase electric energy and peripheral circuit.
7. substation operation data monitoring according to claim 1 and 2 and warning system is characterized in that: described MCU central data treatment circuit comprises R5R0C028FA type single-chip microcomputer and peripheral circuit.
8. substation operation data monitoring according to claim 1 and 2 and warning system is characterized in that: described data storage circuitry comprises AT24C32 storage chip and peripheral circuit.
9. substation operation data monitoring according to claim 1 and 2 and warning system is characterized in that: described 485 communicating circuits comprise MAX3085 chip and peripheral circuit.
10. substation operation data monitoring according to claim 1 and 2 and warning system, it is characterized in that: described output circuit comprises LED 1, LED2, optocoupler N1, N2, resistance R 42, R2, the positive pole of described LED 1 is connected with the quantitative analysis circuit, the negative pole of LED1 links to each other with optocoupler N1 input anode, the N1 input cathode links to each other with ground by resistance R 42, the N1 output links to each other with meritorious calibration stage body, the positive pole of described LED 2 is connected with the quantitative analysis circuit, the negative pole of LED2 links to each other with optocoupler N2 input anode, the N2 input cathode links to each other with ground by resistance R 2, and the N2 output links to each other with idle calibration stage body.
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| CN101902077A (en) * | 2010-07-13 | 2010-12-01 | 杭州交联电气工程有限公司 | Operating data monitoring and alarming system of converting stations |
| CN102436734A (en) * | 2011-10-21 | 2012-05-02 | 南京苏商新能源科技有限公司 | Intelligent energy-saving monitoring management data collecting concentrator and collecting method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101902077A (en) * | 2010-07-13 | 2010-12-01 | 杭州交联电气工程有限公司 | Operating data monitoring and alarming system of converting stations |
| CN102508021A (en) * | 2011-10-09 | 2012-06-20 | 北京机械设备研究所 | Power factor real-time monitoring method based on virtual instrument |
| CN102436734A (en) * | 2011-10-21 | 2012-05-02 | 南京苏商新能源科技有限公司 | Intelligent energy-saving monitoring management data collecting concentrator and collecting method thereof |
| CN102436734B (en) * | 2011-10-21 | 2013-04-10 | 南京苏商新能源科技有限公司 | Intelligent energy-saving monitoring management data collecting concentrator and collecting method thereof |
| CN105356621A (en) * | 2015-12-22 | 2016-02-24 | 南京思飞捷软件科技有限公司 | Air switch, system for air switches and working procedure |
| CN105356621B (en) * | 2015-12-22 | 2018-05-15 | 南京思飞捷软件科技有限公司 | A kind of air switch and air switch system and workflow |
| CN105938164A (en) * | 2016-03-16 | 2016-09-14 | 浙江新能量科技股份有限公司 | Remote intelligent monitoring system and monitoring method for energy operation of transformer substation |
| CN105954622A (en) * | 2016-06-07 | 2016-09-21 | 国网江苏省电力公司电力科学研究院 | Multiple-transformer-substation start debugging panoramic monitoring system and method |
| CN110611714A (en) * | 2019-09-20 | 2019-12-24 | 浙江新能量科技股份有限公司 | Comprehensive energy application control system based on Internet of things big data cloud platform |
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