CN105606149A - Distribution transformer network management system based on Zigbee and RFID technology - Google Patents

Abstract

The invention relates to a distribution transformer network management system based on Zigbee and RFID technology. The system comprises multiple sensors arranged in a transformer station to collection working parameters of transformers, an onsite execution control mechanism, a Zigbee data collection module, a Zigbee data processing module, a Zigbee router node, a Zigbee network coordinator, a Zigbee Modbus gateway, a PLC, an industrial control computer, an RFID electronic tag and an RFID reader-writer, wherein the sensors are connected with the Zigbee data collection module, the data collection module is connected with the data processing module, the Zigbee router node, the Zigbee network coordinator, the Zigbee Modbus gateway, the PLC and the industrial control computer successively, and the RFID electronic tag communicates with the RFID reader-writer. The system can monitor the working parameters of the transformers in real time and is provided with identification information of the transformers themselves, data collection and information management are clearer, and more accurate data basis is provided for intelligent transformer station and remote management.

Description

Based on the distribution transformer NMS of Zigbee and RFID technology

Technical field

The present invention relates to a kind of distribution transformer NMS, particularly a kind of joining based on Zigbee and RFID technologyPiezoelectric transformer NMS, this monitoring system can be used to monitor the running parameter of transformer in transformer station, and in transmissionInformation in have the information of each transformer.

Background technology

Box-type substation comprises transformer, high-voltage switch gear, low voltage equipment and mutual connection and auxiliary equipment thereof, will becomeDepressor, high-voltage switch gear, low voltage equipment and mutual connection and the compact combination of auxiliary equipment thereof, by main electrical scheme and components and partsDifference, centralized arrangement is in one or several airtight case shell in a certain way.

Along with the development of automatic technology, the working environment parameter of remote real-time monitoring box-type substation (temperature, humidity parameter,Parameter etc. is put in office) and the running parameter of transformer (the oil temperature parameter of oil-filled transformer, pressure parameter, vibration parameters, etc.),To improving the environment of box-type substation, the fault of getting rid of transformer is of great benefit to.

In prior art, also do not realize the information management of networking for the information management of transformer, and by transformer workRunning parameter transmits together with RFID electronic labeling information, realizes the technology of networking unified management and does not also report.

Summary of the invention

The invention provides a kind of distribution transformer NMS based on Zigbee and RFID technology, can become by Real-Time MonitoringThe running parameter of depressor (the oil temperature parameter of oil-filled transformer, pressure parameter, vibration parameters etc.), and be furnished with each transformationThe self identification information of device, realizes data acquisition information management more clearly, realizes network management, is intelligent substationProvide data parameters basis more accurately with telemanagement.

For achieving the above object, the present invention is achieved through the following technical solutions:

Based on the distribution transformer NMS of Zigbee and RFID technology, comprise being arranged in multiple transformer stations gatheringThe sensor of transformer running parameter, on-the-spot controlling organization, Zigbee data acquisition module, the Zigbee data processing carried outModule, Zigbee router node, Zigbee network telegon, ZigbeeModbus gateway, PLC, industrial computer, RFIDElectronic tag and rfid interrogator, the sensor of described collection transformer running parameter respectively with Zigbee data acquisition moduleBe connected, Zigbee data acquisition module is connection data processing module, Zigbee router node, Zigbee net successivelyNetwork telegon, ZigbeeModbus gateway, PLC and industrial computer, described RFID electronic tag communicates with rfid interrogatorNews, rfid interrogator is connected with industrial computer; Industrial computer is provided with wireless communication interface or optical communication interface, and industrial computer passes throughWireless communication interface or optical communication interface and telemanagement center communicate;

The sensor involving vibrations sensor of described collection transformer running parameter, oil temperature sensor, pressure sensor; DescribedVibrating sensor be fixed on transformer oil box top by magnet adsorption, directly over the centre position of every phase winding; DescribedOil temperature sensor is used for measuring the oil temperature of oil-filled transformer, is positioned at the top of oil tank of transformer, gos deep into 50mm-80mm in oil;Described pressure sensor is positioned at transformer oil box top, is used for the oil-air pressure of measuring transformer; Described RFID electronics markLabel are arranged at the sidepiece of transformer; In the transformer station of transformer place, be provided with the blower fan that regulates humiture, when ambient temperature and humidity surpassesWhile going out normal range (NR), carry out the running of controlling organization control blower fan by scene and carry out automatic adjusting ambient temperature and humidity.

Described Zigbee data processing module comprises signal access unit, signal conversion unit, isolation amplifying unit and embeddingEnter type micro-computer, signal access unit is connected with signal conversion unit, isolation amplifying unit and embedded micro computer order successively,Embedded micro computer is provided with field-bus interface and communicates by letter with industrial computer, and signal access unit, signal conversion unit and isolation are amplifiedThe gating signal of unit is all from embedded micro computer;

Described signal access unit is made up of UIN1, UIN2, tri-lists of UIN3,8 passage numeral control simulation electronic switches,The signal of access is exported respectively by A1, A2, tri-outputs of A3 after gating;

Described signal conversion unit is made up of resistance, impedance transformer and electronic switch, by B1, B2, tri-outputs of B3End is output respectively, is provided with latch SC in unit, and BX is the gating signal of latch SC, electronic switch S1～S7State determined by the state of latch SC output D0, D1, D2;

Described Isolation Amplifier Module is made up of Capacitor apart assembly, amplifier, resistor network, and wherein Capacitor apart assembly is by electricitySub-K switch c₁₁、Kc₁₂、Kc₂₁、Kc₂₂, capacitor C 6, C7 composition, electronic switch Kc₁₁、Kc₁₂、Kc₂₁、Kc₂₂With what fixFast frequency switches between input and output, realizes the isolation of sensor circuit and amplifying circuit;

Embedded micro computer comprises that A/D converter, reference voltage source, dsp controller, temperature compensation sensor, network connectMouth and memory, reference voltage source is connected with A/D converter, and A/D converter is by data/address bus DB1 and address bus AB1Be connected with dsp controller; Dsp controller one end is by data/address bus DB₂With address bus AB₂With with fieldbus functionNetwork interface connects, and one end is by data/address bus DB₃With address bus AB₃Be connected with memory; Temperature compensation sensor withDsp controller connects, for measuring thermocouple cold junction environment temperature and cold junction auto-compensation or surveying its elsewhere temperature; A/D turnsThe output signal V of parallel operation reception amplifier_out。

Compared with prior art, the invention has the beneficial effects as follows:

1) the distribution transformer NMS based on Zigbee and RFID technology, work that can Real-Time Monitoring transformerParameter (the oil temperature parameter of oil-filled transformer, pressure parameter, vibration parameters etc.), and be furnished with self mark of each transformerKnowledge information (as transformer model, position label, administrative staff etc.), realizes data acquisition information more clearlyManagement, for intelligent substation and telemanagement provide data parameters basis more accurately.

By the substation parameter and transformer parameter and the digital sampling and processing that gather, to the intellectuality control of transformer stationSystem provides data basis accurately, is the Temperature and Humidity Control of environment in transformer station, and it is special that the accident analysis of transformer providesActive data.

2) adopt the distribution transformer NMS of RFID technology, can by rfid interrogator be greater than 10 meters withOuter position is read and write, and makes every terms of information (administrative staff, model, the geographical position of transformer running parameter and transformerPut etc.) be transferred to together administrative center, be convenient to long-range unified management and monitoring.

Brief description of the drawings

Fig. 1 is the overall structure schematic diagram of the distribution transformer NMS based on Zigbee and RFID technology.

Fig. 2 is the structured flowchart of digital sampling and processing.

Fig. 3 is signal access unit schematic diagram.

Fig. 4 is signal conversion unit schematic diagram.

Fig. 5 is isolation amplifying unit schematic diagram.

Fig. 6 is embedded micro computer structure chart.

Detailed description of the invention

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:

See Fig. 1, based on the distribution transformer NMS of Zigbee and RFID technology, comprise and be arranged at multiple power transformationsIn standing, gather the sensor of transformer running parameter, on-the-spot controlling organization, Zigbee data acquisition module, the Zigbee of carrying outData processing module, Zigbee router node, Zigbee network telegon, ZigbeeModbus gateway, PLC, workControl machine, RFID electronic tag and rfid interrogator, the sensor of described collection transformer running parameter respectively with Zigbee numberBe connected according to acquisition module, Zigbee data acquisition module successively connection data processing module, Zigbee router node,Zigbee network telegon, ZigbeeModbus gateway, PLC and industrial computer, described RFID electronic tag and RFID readWrite device and communicate, rfid interrogator is connected with industrial computer; Industrial computer is provided with wireless communication interface or optical communication interface, workControl machine communicates by wireless communication interface or optical communication interface and telemanagement center.

The sensor involving vibrations sensor of described collection transformer running parameter, oil temperature sensor, pressure sensor; DescribedVibrating sensor be fixed on transformer oil box top by magnet adsorption, directly over the centre position of every phase winding; DescribedOil temperature sensor is used for measuring the oil temperature of oil-filled transformer, is positioned at the top of oil tank of transformer, gos deep into 50mm-80mm in oil;Described pressure sensor is positioned at transformer oil box top, is used for the oil-air pressure of measuring transformer; Described RFID electronics markLabel are arranged at the sidepiece of transformer; In the transformer station of transformer place, be provided with the blower fan that regulates humiture, when ambient temperature and humidity surpassesWhile going out normal range (NR), carry out automatic adjusting ambient temperature and humidity by controlling blower fan running.

See Fig. 2, described Zigbee data processing module comprises signal access unit, signal conversion unit, isolation amplification listFirst and embedded micro computer, signal access unit is suitable with signal conversion unit, isolation amplifying unit and embedded micro computer successivelyOrder is connected, and embedded micro computer is provided with field-bus interface and communicates by letter with industrial computer, signal access unit, signal conversion unit andThe gating signal of isolation amplifying unit is all from embedded micro computer.

See Fig. 3, signal access unit is logical by UIN1, UIN2, three lists of UIN3 (as CD4051 or CC4051) 8The digital control simulant electronic switch composition in road, the signal of access is distinguished defeated by A1, A2, tri-outputs of A3 after gatingGo out, IN11, IN21 and IN31 are the 1st road signal input part, and in like manner, IN18, IN28 and IN38 are the 8th road signalInput. QH is signal access unit gating signal, and low level is strobe state, and D2, D1 and D0 are input selected controlSignal, input signal is that timesharing accesses in order. Its gating with control letter from the embedding of the digital sampling and processing electricity that declinesBrain, all exports to Xin Bian Change unit by A1, A2 and A3 after its signal gating access.

See Fig. 4, signal conversion unit is by resistance R 1～R11, impedance transformer GS1～GS6 and electronic switch S1～S7Composition, is exported respectively by B1, B2, tri-outputs of B3, is provided with latch SC in unit, and BX is latch SCGating signal, the state of electronic switch S1～S7 is determined by the state of latch SC output D0, D1, D2;

Letter number becomes Change unit and becomes standard voltage signal by turn Change (omnipotent conditioning) from the various letters number of signal access unit. LetterHao Bian Change unit receives signal access unit output terminals A 1, A2 and A3 end signal, turns by the conditioning of Xin Bian Change unitChange becomes output B1, the B2 of regulation and the output signal of B3. Vout is additional reference voltage, and D2, D1 and D0 comeFrom the selectivity signal of the embedded micro computer of digital sampling and processing, with the conversion of control inputs signal.

Under the control of embedded micro computer, can be by signal Direct Transform specified standards such as mV, mA, thermal resistance, thermocoupleSignal, when enforcement, this standard signal can be 5V;

See Fig. 5, Isolation Amplifier Module is by Capacitor apart assembly U₁, amplifier U₂, resistor network U₃Composition, wherein electric capacity everyFrom assembly U₁By electronic switch Kc₁₁、Kc₁₂、Kc₂₁、Kc₂₂, capacitor C 6, C7 composition, electronic switch Kc₁₁、Kc₁₂、Kc₂₁、Kc₂₂Switch between input and output with the fast frequency of fixing, realize the isolation of sensor circuit and amplifying circuit; GL isCapacitance switch formula isolation gating signal, low level is gating, D0 is capacitance switch control signal, amplify selectivity signal all fromEmbedded micro computer; This capacitance switch formula isolation, has highly reliable isolation characteristic, programmable amplifier, and good linearity, complies withThe automatically selected range of the number of it is believed that, especially can ensure that faint data-signal amplifies undistorted.

When D0 low level, KC11～KC22 is combined in the left side, and capacitor C 1 and C2 deposit signal in, when D0 high level,Signal is passed to operational amplifier U₂；U₂And U₃Form programmable amplifier, at the amplification selected control letter from embedded micro computerUnder number, regulate the resistance of digital regulation resistance SD1, SD2 and SD3, realize the variation of multiplication factor, change the amount of signalJourney, and then improve the precision of signal conversion; Isolation amplifying unit has been realized the reliable isolation of conditioning unit and amplifying circuit,Disturb with ride gain amplifying circuit and front end, simultaneously according to the size of letter, the gain of selected its amplifying circuit automatically, i.e. choosingSelect range, be referred to as programmable-gain.

See Fig. 6, embedded micro computer comprise A/D converter U4, reference voltage source, dsp controller U5 (as TMS320C54X),Temperature compensation sensor DS18B20, network interface U6 and memory U7, reference voltage source is connected with A/D converter, and A/D turnsParallel operation is connected with dsp controller with address bus AB1 by data/address bus DB1; Dsp controller one end is by data/address bus DB₂With address bus AB₂Be connected with the network interface of fieldbus function, one end is by data/address bus DB₃With address bus AB₃Be connected with memory; Temperature compensation sensor DS18B20 is connected with dsp controller, for measuring thermocouple cold junction environment temperatureWith cold junction auto-compensation or survey its elsewhere temperature; The output signal V of A/D converter reception amplifier_out. In order to eliminate environment temperatureThe impact that degree produces thermocouple certainty of measurement, dsp controller U5 connects a DS18B20 one-wire bus formula digital temperature and passesSensor; Network interface U6 can adopt Profibus-DP and Modbus fieldbus, and realization is communicated by letter with industrial computer; USB interfaceCan be used for the renewal of program.

In embodiment, A/D converter adopts ± 18 high resolution A/D converters, as Maxim product MAX132MRCChip, serial, low-power consumption, temperature range-55 DEG C～+ 125 DEG C; Dsp controller is the core of data acquisition processPart, the TMS320C2407 of employing moral thirty instrument (TI), 16 bit DSPs; Memory is read-only storage; Network interface is specialIn Profibus-DP and Modbus fieldbus; Reference voltage source, for A/D converter provides reference voltage, generally adoptsThe high precision of 5V or 2.5V, and galvanic current source; USB interface is unloading setting or exports necessary information.

Claims (3)

1. the distribution transformer NMS based on Zigbee and RFID technology, is characterized in that, comprises and being arranged atIn multiple transformer stations, gather transformer running parameter sensor, on-the-spot carry out controlling organization, Zigbee data acquisition module,Zigbee data processing module, Zigbee router node, Zigbee network telegon, ZigbeeModbus gateway,PLC, industrial computer, RFID electronic tag and rfid interrogator, the sensor of described collection transformer running parameter respectively withZigbee data acquisition module is connected, and Zigbee data acquisition module is connection data processing module, Zigbee road successivelyBy device node, Zigbee network telegon, ZigbeeModbus gateway, PLC and industrial computer, described RFID electronic tagCommunicate with rfid interrogator, rfid interrogator is connected with industrial computer; Industrial computer is provided with wireless communication interface or optical fiber is logicalCommunication interface, industrial computer communicates by wireless communication interface or optical communication interface and telemanagement center;

The sensor involving vibrations sensor of described collection transformer running parameter, oil temperature sensor, pressure sensor; DescribedVibrating sensor be fixed on transformer oil box top by magnet adsorption, directly over the centre position of every phase winding; DescribedOil temperature sensor is used for measuring the oil temperature of oil-filled transformer, is positioned at the top of oil tank of transformer, gos deep into 50mm-80mm in oil;Described pressure sensor is positioned at transformer oil box top, is used for the oil-air pressure of measuring transformer; Described RFID electronics markLabel are arranged at the sidepiece of transformer; In the transformer station of transformer place, be provided with the blower fan that regulates humiture, when ambient temperature and humidity surpassesWhile going out normal range (NR), carry out automatic adjusting ambient temperature and humidity by controlling blower fan running.

2. distributed intelligence according to claim 1 transformer station network monitoring system, is characterized in that described ZigbeeData processing module comprises signal access unit, signal conversion unit, isolation amplifying unit and embedded micro computer, and signal connectsEnter unit and be connected with signal conversion unit, isolation amplifying unit and embedded micro computer order successively, embedded micro computer is provided withField-bus interface is communicated by letter with industrial computer, and the gating signal of signal access unit, signal conversion unit and isolation amplifying unit is equalFrom embedded micro computer.

3. distributed intelligence according to claim 2 transformer station network monitoring system, is characterized in that described signalAccess unit is made up of UIN1, UIN2, tri-lists of UIN3,8 passage numeral control simulation electronic switches, the signal of accessAfter gating, exported respectively by A1, A2, tri-outputs of A3;

Described signal conversion unit is made up of resistance, impedance transformer and electronic switch, by B1, B2, tri-outputs of B3End is output respectively, is provided with latch SC in unit, and BX is the gating signal of latch SC, electronic switch S1～S7State determined by the state of latch SC output D0, D1, D2;

Described Isolation Amplifier Module is made up of Capacitor apart assembly, amplifier, resistor network, and wherein Capacitor apart assembly is by electricitySub-K switch c₁₁、Kc₁₂、Kc₂₁、Kc₂₂, capacitor C 6, C7 composition, electronic switch Kc₁₁、Kc₁₂、Kc₂₁、Kc₂₂With what fixFast frequency switches between input and output, realizes the isolation of sensor circuit and amplifying circuit;

Embedded micro computer comprises that A/D converter, reference voltage source, dsp controller, temperature compensation sensor, network connectMouth and memory, reference voltage source is connected with A/D converter, and A/D converter is by data/address bus DB1 and address bus AB1Be connected with dsp controller; Dsp controller one end is by data/address bus DB₂With address bus AB₂With with fieldbus functionNetwork interface connects, and one end is by data/address bus DB₃With address bus AB₃Be connected with memory; Temperature compensation sensor withDsp controller connects, for measuring thermocouple cold junction environment temperature and cold junction auto-compensation or surveying its elsewhere temperature; A/D turnsThe output signal V of parallel operation reception amplifier_out。