CN105634138A - Multifunctional three-phase electric power monitoring apparatus - Google Patents
Multifunctional three-phase electric power monitoring apparatus Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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Abstract
The invention discloses a multifunctional three-phase electric power monitoring apparatus, and belongs to the technical field of power utilization safety and energy conservation. The multifunctional three-phase electric power monitoring apparatus comprises a micro-control unit, and a power supply unit, a Lonworks intelligent transceiver, a relay control module, a power utilization measurement chip, a cable temperature detection circuit, a data storage circuit and a high-precision real-time clock circuit that are connected with the micro-control unit separately. The multifunctional three-phase electric power monitoring apparatus has the functions of monitoring the voltage, current, power, power factors, leakage current, cable temperature, harmonic components and electric energy measurement, high-precision calendar clock, and the like; alarm threshold values can be set for all monitored parameters; an alarm can be sent out when parameter overrun occurs, and the system power supply can be configured to be switched off in case of alarms; various electric energy related parameter data is provided for performing evaluation and analysis for building electric energy quality; and in addition, automatic power supply or power off control can be carried out according to set time frames or remote instructions; and the energy conservation control for buildings satisfies the philosophy of green buildings.
Description
Technical field
The invention belongs to Electrical Safety and field of energy-saving technology, especially a kind of Multifunctional three-phase electric power monitoring device.
Background technology
Along with the develop rapidly of China's economy, living standards of the people improve year by year, and the consumption of various electric installation and housed device increases suddenly, and electrical fire accident is also in ascendant trend year by year. According to statistics, National Electrical fire failure, close to the 30% of fire failure total amount, occupies the first place of all kinds of fire, causes massive losses to the country and people's lives and properties.
Electrical fire is mainly owing to electric circuit or electrical equipment overload, short circuit, electric leakage, contact resistance be excessive or puncture of insulation causes high temperature, electrical spark and electric arc etc. caused. Electrical fire case site inspection being analyzed according to fire-fighting department, the fire causing ground fault to cause owing to leaking electricity in electrical fire has accounted for more than half of electrical fire case. Electric leakage is the important hidden danger causing electrical fire, leaks electricity simultaneously and also can cause the electric shock injury to the person and waste of energy. Even if building is newly-built, its distributing cable electric insulation also can make performance reduce and leak electricity along with the increase of duration of service.
For preventing trouble before it happens, the electric leakage situation of in-service monitoring and detection architectural electricity system, just becomes precognition and reduces the effective technology means of electrical fire. Electrical fire electric leakage detecting alarm and existing residual current circuit breaker (protection of electric leakage switch) with the use of, it is possible to form the complete preservation system to leak electricity " whole monitoring, partial trip ". The system not allowed to cut off the electricity supply for some or terminator, owing to can not adopt residual current circuit breaker, then install the selection that electrical fire electric leakage detecting alarm becomes ideal.
There is the producer headed by Shi Naidewangao current domestic market, defines the fire hazard monitoring warning series product from end detector, end independence monitoring equipment, networking monitoring equipment, center monitoring cell-in-series. Meanwhile domestic also occur product pattern that fire hazard monitoring equipment and intelligent instrument combine.
The correlation function that analogous products realize:
1. realize original three-phase multifunctional power monitoring terminal meter, monitoring, controlling functions.
2. the multiple protection functions such as short circuit, electric leakage, overvoltage, under-voltage, phase shortage.
3. electric leakage action protection 20mA-1000mA continuously adjustabe.
4. temperature alarming: 50 DEG C��120 DEG C
5. action failure record can be looked into, the machine action real time record.
6. can be used alone or networking use.
Product similar at present transfinites and protects the function of warning aspect comprehensive not enough; following these may do not caused all considering of safety factors: 1) cable temperature is too high; 2) three-phase imbalance, phase shortage; 3) zero sequence electric current is too high; 4) electric current, power are excessive; 5) power factor is too low, 6) harmonic wave is excessively high. And this series products only focuses on electricity consumption online monitoring alarm, ignore the important demand of building energy conservation control, power quality analysis.
China is the rare country of the energy, and energy-saving and emission-reduction are a fundamental state policy and the strategic decisions of China, and construction industry is that the mankind are so far to one of maximum industry of natural resources, energy consumption. Along with the quickening of urbanization process, urban environment is threatened, and how to meet sustainable development view in foundation, while save energy, the human settlement adapting to ecology and climate state, can the energy-conservation energy, it is achieved Sustainable development, it should be the focus that current construction industry is paid close attention to. Therefore, building energy conservation has become the important directions of construction industry development, how to resolve power saving in building field, has very important meaning for China's sustained economic development.
The quality of power supply generally refers to the amplitude of voltage or electric current, frequency, the deviation of the parameters such as waveform and standard value. In the past, in power system, many electromechanical equipments normally can work in the variation range that above-mentioned parameter is relatively large. But at nearly 50 to ten years, along with the development of modern science and technology, various commercial affairs electrical equipment novel, efficient, multi-functional is constantly updated, make application based on the nonlinear-load of power electronics device in such as commercial affairs this quasi-representative public building of office building more and more extensive, cause the factor of power quality problem also to increase gradually, to same various complexity universal fast, accurate, the safe and reliable operation of the electrical equipment of quality of power supply sensitivity is brought serious threat.
Summary of the invention
The present invention proposes a kind of Multifunctional three-phase electric power monitoring device, there is monitoring voltage, electric current, power, power factor, leakage current, cable temperature, harmonic component and electric energy metrical, high precision day the function such as calendar clock, can be all monitoring parameters and alarm valve value is set, occur when parameter transfinites to cut off system power supply when reporting to the police configurable warning, various electric energy associated parameter data is provided to can be used for the building quality of power supply is carried out analysis and assessment, and automatic power transmission or power-off control is carried out according to setting period or remote command, energy for building is carried out the thought that Energy Saving Control meets green building.
The technical scheme of the present invention is achieved in that
A kind of Multifunctional three-phase electric power monitoring device, comprise micro-control unit, and the power subsystem being connected with described micro-control unit respectively, Lonworks smart transceiver, relay control module, Electro-metering chip, cable temperature sensing circuit, data storage circuitry, real-time clock circuit, it is characterised in that:
Described micro-control unit selects the STM32F103RCT6 micro-chip based on ARMCortex-M kernel, and LQFP64 encapsulates, and it supports 51 general purpose I/O, 4 16 general purpose timers, 3 SPI, 2 I2C, 5 UART, operating voltage 2.0��3.6V;
Described Electro-metering chip connects voltage, current sampling circuit and leakage current sample circuit respectively, described Electro-metering chip selects electricity special chip ATT7022E, voltage, electric current, meritorious, idle, power factor, electric voltage frequency and electric energy metrical can be gathered, and by described SPI interface and described micro-control unit communication;
Described cable temperature sensing circuit temperature survey adopts the DSl8B20 digital temperature sensor of unibus, high precision, described digital thermometer provides the temperature of 9 binary temperature reading indicating devices, and information is sent into through single line interface or sent described digital thermometer.
As preferably, described power subsystem adopts LH05-10D0524-1 switch power supply, exchange and direct supply can be provided, described switch power supply provides two-way electrical isolation power supply, it is respectively an a road DC5V and road DC24V, described DC5V becomes DC3.3V through linear voltage regulator ASM1117-3.3 voltage stabilizing, and described DC5V is Lonworks smart transceiver offer power supply, and described DC3.3V is mainly micro-control unit, Electro-metering chip provides power supply; Described DC24V provides power supply for relay output control circuit.
As preferably, described power subsystem also comprises battery, described battery is used for electricity afterwards for real-time clock circuit is powered.
As preferably, described Lonworks smart transceiver comprises FT5000 twisted-pair feeder smart transceiver, described FT5000 twisted-pair feeder smart transceiver is communicated with described micro-control unit by described UART communication interface.
As preferably, an integrated high performance Neuron core and a free topology twisted-pair feeder transceiver in described FT5000 twisted-pair feeder smart transceiver, FT5000 twisted-pair feeder smart transceiver is made up of independence 8 logic processors of three managing physical media access control layer, network layer and user application layers respectively.
As preferably, described relay control module comprises dry contact state detection circuit, relay output control circuit and photoelectric isolating circuit, described dry contact state detection circuit is for the dry contact feedback states of the state and external control device that detect rly. dry contact, the output of dry contact state detection circuit is connected with the general purpose I/O of micro-control unit by photoelectric isolating circuit, the control signal output terminal of micro-control unit connects relay output control circuit by photoelectric isolating circuit, and relay output control circuit is for controlling external control device.
As preferably, described voltage, current sampling circuit comprise voltage sampling circuit, current sampling circuit and frequency overlapped-resistable filter; Described voltage sampling circuit adopts electric resistance partial pressure mode, by measurement voltage through resistance pressure-dividing network dividing potential drop, obtains meeting electricity computation chip voltage input passage, and voltage input passage selects 200mV effective voltage value; Current sampling circuit adopts current transformer Isolation input mode, the electric current signal induced converts corresponding voltage signal to through accurate resistance, copper-manganese resistance sampling input mode, load current signal converts to through resistor MR 1 and meets electricity computation chip electric current input passage; Described frequency overlapped-resistable filter is made up of 1.2K resistance and 0.01uF electric capacity, and its input terminus is connected with described voltage sampling circuit and described current sampling circuit output terminal respectively, and output terminal is connected to the Measurement channel pin of described Electro-metering chip.
As preferably, this monitoring device also comprises LCD display screen, button and LED pilot lamp, described LCD display screen is connected with described micro-control unit by I2C mouth, and described button and LED pilot lamp are connected with described micro-control unit by general purpose I/O.
As preferably, described data storage circuitry adopts non-volatile ferroelectric memory.
The useful effect of the embodiment of the present invention is: solve existing electricity consumption on-line monitoring equipment, and collection analysis data are problem not comprehensively. Also solve in this kind of energy management devices technology the deficiency existed simultaneously, provide numerous correlation parameter and before there is fault, namely can get rid of potential safety hazard by effectively analyzing to assessing by energy quality, or the emphasis monitoring of emphasis hidden danger department, a kind of control mode that can carry out cutting off according to the period and connect electrical equipment is proposed in addition, and electricity consumption is added up, timesharing, monthly carries out quantitative statistics; It is applicable to office building, public building, school, hospital's occasion, electrical equipment is carried out unified management and control, reaches the object of energy-saving and emission-reduction.
The present invention can be widely used in the buildingss such as office building, public building, school, hospital with monitoring, and can networking management and Energy Saving Control, it is possible to for place uses such as families. The present invention is used not only to realize Electrical Safety monitoring, also have energy-conservation service value-adding service. Effect of the present invention is as follows:
1, on-line monitoring energy safety, reports to the police, and necessity is protection personal safety as well as the property safety of cutting off the electricity supply;
2, remote networking informs relevant departments when generation is reported to the police by the long-range system platform very first time so that relevant fault can be processed timely, avoids generation and the expansion of accident.
3, overload alarm writing function is provided, it is provided that the foundation that alert event is reviewed.
4, the present invention is by the shutdown mode of direct cut-out system power supply, it is possible to prevent the energy dissipation that non-working hour causes, meanwhile, and the also safety of proterctive equipment;
5, power quality monitoring, prevents overtension damage equipment, brownout efficiency very low;
6, load measurement, with measure, used time statistics, help to realize using energy planning management equipment safety management;
7, for adjusting working hour temporarily, it is possible to arrange control time by network remote; For individual residence, before the person goes home, it is possible to Long-distance Control split-type air conditioner runs, people to a comfortable environment existing during family, thus both realized energy-conservation, the life needs of people can have been met again;
The intelligent interface networking establishment system 8, with Lonworks distributed control network technology, can meet management and the systematize of split-type air conditioner automatization, again cost-saving, facilitate design and the site operation of engineering.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, it is briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural principle block diagram of electric force monitoring apparatus of the present invention;
Fig. 2 is be the structural principle block diagram that Lonworks intelligence receives device;
Fig. 3 is power unit circuit schematic diagram;
Fig. 4 is voltage, current sampling circuit schematic diagram;
Fig. 5 is Electro-metering chip circuit schematic diagram;
Fig. 6 is leakage current sample circuit schematic diagram;
Fig. 7 is cable temperature sensing circuit schematic diagram;
Fig. 8 is relay control module schematic circuit diagram;
Fig. 9 is data storage circuitry schematic diagram;
Figure 10 is real-time clock schematic circuit diagram.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only the present invention's part embodiment, instead of whole embodiments. Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, a kind of Multifunctional three-phase electric power monitoring device, comprise micro-control unit, and the power subsystem being connected with described micro-control unit respectively, Lonworks smart transceiver, relay control module, Electro-metering chip, cable temperature sensing circuit, data storage circuitry, real-time clock circuit.
In the application, micro-control unit selects the STM32F103RCT6 micro-chip based on ARMCortex-M kernel, and LQFP64 encapsulates, and it supports 51 general purpose I/O, 4 16 general purpose timers, 3 SPI, 2 I2C, 5 UART, operating voltage 2.0��3.6V. Electro-metering chip selects electricity special chip ATT7022E, it is possible to gather voltage, electric current, meritorious, idle, power factor, electric voltage frequency and electric energy metrical; Communicated with STM32F103RCT6 by SPI interface. The micro-chip section of being connected with code LCD screen and LED pilot lamp, display measurement parameter, alarm message, state, be designed with four buttons and conveniently arrange device parameter on LCD.
As shown in Figure 2, Lonworks smart transceiver comprises FT5000 twisted-pair feeder smart transceiver, FT5000 twisted-pair feeder smart transceiver is communicated with described micro-control unit by described UART communication interface, an integrated high performance Neuron core and a free topology twisted-pair feeder transceiver in FT5000 twisted-pair feeder smart transceiver, FT5000 twisted-pair feeder smart transceiver is made up of independence 8 logic processors of three managing physical media access control layer, network layer and user application layers respectively. These are called as medium access control (MAC) treater, network (NET) treater and application (APP) treater. Adopt Lonworks communications protocol, possess opening, interoperability, high reliability.
As shown in Figure 3, power subsystem adopts LH05-10D0524-1 switch power module, stability is higher, exchange and direct supply can be provided, switch power module provides two-way electrical isolation power supply, is respectively an a road DC5V and road DC24V, and DC5V becomes DC3.3V through linear voltage regulator ASM1117-3.3 voltage stabilizing, DC5V is Lonworks smart transceiver offer power supply, and DC3.3V is mainly micro-control unit, Electro-metering chip, ferroelectric memory and related peripheral chip circuit and provides power supply; DC24V provides power supply for relay output control circuit, also has battery to be used for electricity afterwards for real-time clock circuit is powered in addition.
As shown in Figure 4, voltage, current sampling circuit comprise voltage sampling circuit, current sampling circuit and frequency overlapped-resistable filter. Voltage sampling circuit adopts electric resistance partial pressure mode, by measurement voltage through resistance pressure-dividing network dividing potential drop, obtains meeting electricity computation chip voltage input passage, and voltage input passage selects 200mV effective voltage value, and voltage signal is too big, can cause crosstalk, and range overflows. Current sampling circuit adopts current transformer Isolation input mode, the electric current signal induced converts corresponding voltage signal to through accurate resistance, copper-manganese resistance sampling input mode, load current signal converts to through resistor MR 1 and meets electricity computation chip electric current input passage; Described frequency overlapped-resistable filter is made up of 1.2K resistance and 0.01uF electric capacity, its input terminus is connected with voltage sampling circuit and current sampling circuit output terminal respectively, output terminal is connected to the Measurement channel pin of described Electro-metering chip, its structure and parameter to be particular about symmetry, and adopt the good components and parts of temperature performance, thus the temperature profile obtained when ensureing measurement.
As shown in Figure 5, Electro-metering chip selects electricity special chip ATT7022E, is applicable to phase three-wire three and three-phase and four-line application. ATT7022E is integrated with the circuit such as the digital signal processing of multichannel two rank sigma-deltaADC, reference voltage circuit and all power, energy, virtual value, power factor and frequency measurement, each phase can be measured and close the wattful power of phase, wattless power, applied power, meritorious energy and idle energy, the parameters such as each phase current, voltage effective value, power factor, phase angle, frequency can also be measured simultaneously, fully meet the demand of three-phase compound tariff multifunctional electric energy meter. High precision, in the dynamic working range of input (5000:1), nonlinear measurement error is less than 0.1%, active power measurement meets 0.2S, 0.5S, supports IEC62053-22:2003, GB/T17215.322-2008, reactive power measurement meets 1 grade, 2 grades, support IEC62053-23:2003, GB/T17215.323-2008, can be accurately measured containing the meritorious, idle of 41 subharmonic and applied power, electric energy.
As shown in Figure 6, the residual current that leakage current sample circuit is external transformer induced go out electric current signal convert the electric current Measurement channel pin of corresponding voltage signal to computation chip to through accurate resistance. In current input circuit, resistance 1.2K and electric capacity 0.01uF constitutes frequency overlapped-resistable filter, and its structure and parameter to be particular about symmetry, and adopts the good components and parts of temperature performance, thus the temperature profile obtained when ensureing measurement.
As shown in Figure 7, the temperature sensor of cable temperature sensing circuit adopts the DSl8B20 of a bus, DSl8B20 digital thermometer provides the temperature of 9 (scale-of-two) temperature reading indicating devices, information is sent into DSl8B20 through single line interface or is sent from DSl8B20, therefore only needs a line (and ground wire) from host CPU to DSl8B20. The power supply of DSl8B20 can be provided by data line itself and not need outside power supply. Useful range from-55 to+125 increment size of DSl8B20 is 0.5 can digital for temperature inversion one-tenth in ls (typical case value). Increase avoiding device when TVS pipe has high pressure to disturb in outside to damage.
As shown in Figure 8, the input of relay control module state is connected to contactor secondary contact, the on off state of feedback contactor. Adopt DC24V to drive power supply as rly., drive rly. by Phototube Coupling, lifting system reliability.
As shown in Figure 9, data storage circuitry adopts non-volatile ferroelectric memory, for depositing energy information, and alarm logging, parameters, and other important data.
As shown in Figure 10, keeping when the external button cell of real-time clock circuit is used for electricity, for paying, rate timesharing calculates, the important informational function of timing control and alarm message record etc. and time correlation.
The technology used in the present invention principle and energy-saving control method:
1. what gather building uses the take off data such as energy, load, leakage current, power supply line wires temperature, the quality of power supply, stores by MCU, processes these data, and by the communication interface that the present invention has, for systems connection.
2. collect parameter valve value, loading capacity that correlation parameters such as using energy, load, leakage current, power supply line wires temperature, the quality of power supply combines setting, send and report to the police and the power-off Control protection person and equipment property safety.
3. when there is affair alarm, relative alarm parameter can be glimmered on liquid crystal display, warning staff.
4. there is alert event writing function (parameter alarming value can be arranged, alert event record alarm parameters value, time of fire alarming)
5. the load operation parameter of record and the actual loading capacity contrast connected, judge that whether loading capacity is reasonable in design, whether there is the hidden danger that transfinites.
6., according to the power factor gathering circuit, avoid invalid electric energy loss.
7. provide harmonic component to measure, for the quality of power supply provides an important evaluation index, harmonic component is excessive often to be caused: cable is overheated, transformer is overheated, reactive-load compensation device damages, unexpected tripping operation, the detrimentally affect to electronics, extra power loss.
8. multi tariff function is provided, supports Jian Feng Pinggu timesharing energy calculate, for unit rational utilization of electricity provides according to reference.
9. carrying high precision day calendar clock, MCU connects the power supply of electrical equipment according to the start working hour of setting, and operationally beyond section, the time period cuts off power supply, eliminates unnecessary waste of energy and potential safety hazard.
10. month power consumption freezing function, shows the use energy service condition of every month in 1 year, is that energy analysis provides convenient.
11. by the supervisory system of the many split-type air conditioners of Lonworks network construction, and can carry out integrated with energy management system, the man-machine interaction interface of system platform is utilized to monitor, it is possible to be issued with energy information, disbursement and settlement by this platform, thus controlled by ladder of management.
The technology feature of the present invention:
1. measure three-phase voltage, electric current, wattful power, wattless power, power factor, frequency, requirement.
2. measure phase-splitting active energy, just to total active energy, oppositely total active energy, total active energy.
3. measure the idle electric energy of phase-splitting, just to total idle electric energy, reverse total idle electric energy, total idle electric energy.
4. measure this month just to active energy, this month reverse active energy, this month total active energy.
5. measure this month just to idle electric energy, this month reverse idle electric energy, this month total idle electric energy.
6. measure this day just to active energy, this day reverse active energy.
7.1��December monthly just freezes to active energy.
8. measure the current year just to active energy, the current year reverse active energy.
9. multi tariff function, metering point, peak, paddy, straight and even to active energy, the period can be arranged.
10. pre paid functionality, supports that electricity price is arranged, moves back power purchase, overdraw and arrearage power-off.
11. electric safety detection functions;
A.1 road leakage current measurement, can detect the leakage current of three-phase branch road;
B. can arranging leakage current alarm threshold value, super threshold value can carry out power-off control (configurable) automatically;
C.3 road temperature survey, can the cable temperature of detection branch three-phase line;
D. can arranging cable temperature alarming threshold value, super threshold value can carry out power-off control (configurable) automatically;
12. power quality analysis: 2��31 subharmonic containing ratios that three-phase voltage, electric current can be measured, and total harmonic distortion factor, odd harmonic distortion rate, even-order harmonic aberration rate.
13. three-phase voltages, electric current, power maximum value and the record of date and time in moment occurs and store;
14. maximum requirements and the record of date and time in moment occurs and store.
15.LCD display screen, can show the parameters such as three-phase voltage, electric current, power, electric energy, requirement, clock.
16. pilot lamp indicate the instruction that communicates with temperature over-range state and LonWorks of leaking electricity.
17. support three-phase four-wire system and three-phase three wiring modes processed.
18. have overload alarm: cable thermo-field thoery is limit, three-phase current unbalance rate superelevation limit, voltage superelevation lower bound, phase shortage, leakage current superelevation is limit, electric current, wattful power superelevation are limit, power factor ultra-low limit, the overload alarms such as total harmonic wave superelevation limit, parameter alarm threshold value can be arranged, and load rated current can field panel be arranged; Above-mentioned transfiniting can be configured to power-off of transfiniting (rly. output action).
19. event recorders: 20 alert event records, band parameter data values and time interocclusal record.
20. by panel button operation, can scene arrange CT, PT become than parameter, rated current, output control, clock school time, timing control parameter etc.
The 21. normal open relays of road Phototube Coupling export, and can be configured to level or pulsed mode, and pulse width is configurable, supports that independent plesichronous controls.
22.4 road photoelectric switch amount inputs.
23. real-time clock functions, when supporting long-range school.
24. data fall electricity preservation.
25. terminal inner integrated switch power, direct 220 supplied by AC/DC electricity.
The foregoing is only the better embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment of doing, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a Multifunctional three-phase electric power monitoring device, comprise micro-control unit, and the power subsystem being connected with described micro-control unit respectively, Lonworks smart transceiver, relay control module, Electro-metering chip, cable temperature sensing circuit, data storage circuitry, real-time clock circuit, it is characterised in that:
Described micro-control unit selects the STM32F103RCT6 micro-chip based on ARMCortex-M kernel, and LQFP64 encapsulates, and it supports 51 general purpose I/O, 4 16 general purpose timers, 3 SPI, 2 I2C, 5 UART, operating voltage 2.0��3.6V;
Described Electro-metering chip connects voltage, current sampling circuit and leakage current sample circuit respectively, described Electro-metering chip selects electricity special chip ATT7022E, voltage, electric current, meritorious, idle, power factor, electric voltage frequency and electric energy metrical can be gathered, and by described SPI interface and described micro-control unit communication;
Described cable temperature sensing circuit temperature survey adopts the DSl8B20 digital temperature sensor of unibus, high precision, described digital thermometer provides the temperature of 9 binary temperature reading indicating devices, and information is sent into through single line interface or sent described digital thermometer.
2. a kind of Multifunctional three-phase electric power monitoring device according to claim 1, it is characterized in that: described power subsystem adopts LH05-10D0524-1 switch power supply, exchange and direct supply can be provided, described switch power supply provides two-way electrical isolation power supply, it is respectively an a road DC5V and road DC24V, described DC5V becomes DC3.3V through linear voltage regulator ASM1117-3.3 voltage stabilizing, described DC5V is Lonworks smart transceiver offer power supply, and described DC3.3V is mainly micro-control unit, Electro-metering chip provides power supply; Described DC24V provides power supply for relay output control circuit.
3. a kind of Multifunctional three-phase electric power monitoring device according to claim 2, it is characterised in that: described power subsystem also comprises battery, and described battery is used for electricity afterwards for real-time clock circuit is powered.
4. a kind of Multifunctional three-phase electric power monitoring device according to claim 1, it is characterized in that: described Lonworks smart transceiver comprises FT5000 twisted-pair feeder smart transceiver, described FT5000 twisted-pair feeder smart transceiver is communicated with described micro-control unit by described UART communication interface.
5. a kind of Multifunctional three-phase electric power monitoring device according to claim 4, it is characterized in that: an integrated high performance Neuron core and a free topology twisted-pair feeder transceiver in described FT5000 twisted-pair feeder smart transceiver, FT5000 twisted-pair feeder smart transceiver is made up of independence 8 logic processors of three managing physical media access control layer, network layer and user application layers respectively.
6. a kind of Multifunctional three-phase electric power monitoring device according to claim 2, it is characterized in that: described relay control module comprises dry contact state detection circuit, relay output control circuit and photoelectric isolating circuit, described dry contact state detection circuit is for the dry contact feedback states of the state and external control device that detect rly. dry contact, the output of dry contact state detection circuit is connected with the general purpose I/O of micro-control unit by photoelectric isolating circuit, the control signal output terminal of micro-control unit connects relay output control circuit by photoelectric isolating circuit, relay output control circuit is for controlling external control device.
7. a kind of Multifunctional three-phase electric power monitoring device according to claim 1, it is characterised in that: described voltage, current sampling circuit comprise voltage sampling circuit, current sampling circuit and frequency overlapped-resistable filter; Described voltage sampling circuit adopts electric resistance partial pressure mode, by measurement voltage through resistance pressure-dividing network dividing potential drop, obtains meeting electricity computation chip voltage input passage, and voltage input passage selects 200mV effective voltage value; Current sampling circuit adopts current transformer Isolation input mode, the electric current signal induced converts corresponding voltage signal to through accurate resistance, copper-manganese resistance sampling input mode, load current signal converts to through resistor MR 1 and meets electricity computation chip electric current input passage; Described frequency overlapped-resistable filter is made up of 1.2K resistance and 0.01uF electric capacity, and its input terminus is connected with described voltage sampling circuit and described current sampling circuit output terminal respectively, and output terminal is connected to the Measurement channel pin of described Electro-metering chip.
8. a kind of Multifunctional three-phase electric power monitoring device according to claim 1, it is characterized in that: this monitoring device also comprises LCD display screen, button and LED pilot lamp, described LCD display screen is connected with described micro-control unit by I2C mouth, and described button and LED pilot lamp are connected with described micro-control unit by general purpose I/O.
9. a kind of Multifunctional three-phase electric power monitoring device according to claim 1, it is characterised in that: described data storage circuitry adopts non-volatile ferroelectric memory.
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| CN106018925A (en) * | 2016-07-15 | 2016-10-12 | 广州开能电气实业有限公司 | DC system intelligent sensor |
| CN106128058A (en) * | 2016-08-18 | 2016-11-16 | 无锡蓝天电子股份有限公司 | A kind of fire alarm control unit of band detection earth fault function |
| CN106159892B (en) * | 2016-09-27 | 2019-01-22 | 吴文炤 | A kind of circuit structure of intelligent leakage circuit breaker |
| CN106159892A (en) * | 2016-09-27 | 2016-11-23 | 吴文炤 | A kind of circuit structure of intelligent leakage circuit breaker |
| CN106908731A (en) * | 2017-02-06 | 2017-06-30 | 深圳市九航消防科技有限公司 | The emergent calling device of fireman that a kind of electric quantity display device and carried charge show |
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| CN107677911A (en) * | 2017-11-06 | 2018-02-09 | 长春工程学院 | A kind of electric energy quality detection device with electric fire disaster warning function |
| CN107677321A (en) * | 2017-11-10 | 2018-02-09 | 江苏镇安欣润电力科技有限公司 | A kind of power information acquisition system based on CAN |
| CN107734817A (en) * | 2017-11-17 | 2018-02-23 | 广州市河东电子有限公司 | Multi-way intelligence current sensing relay and system |
| CN108490252A (en) * | 2018-04-08 | 2018-09-04 | 海南聚能科技创新研究院有限公司 | A kind of intelligent electric meter |
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| CN109560614A (en) * | 2019-01-08 | 2019-04-02 | 武汉光谷电气有限公司 | A kind of modularization monitoring device and method for data center's first cabinet of each row |
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| CN110849480A (en) * | 2019-10-28 | 2020-02-28 | 国网山东省电力公司莱阳市供电公司 | Temperature monitoring system for high-voltage electrical equipment |
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Application publication date: 20160601 |