CN103644942A - Electrical power efficiency monitoring terminal and system - Google Patents
Electrical power efficiency monitoring terminal and system Download PDFInfo
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- CN103644942A CN103644942A CN201310715024.0A CN201310715024A CN103644942A CN 103644942 A CN103644942 A CN 103644942A CN 201310715024 A CN201310715024 A CN 201310715024A CN 103644942 A CN103644942 A CN 103644942A
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Abstract
An embodiment of the invention provides an electrical power efficiency monitoring terminal and system. The electrical power efficiency monitoring terminal comprises a direct-current data acquisition circuit connected with an electrical power inlet wire and used for acquiring non-electrical-quantity type efficiency data of the electrical power inlet wire simultaneously, an alternating-current data acquisition circuit connected with the electrical power inlet wire and used for acquiring electrical-quantity type efficiency data of the electrical power inlet wire. The problem that the data acquired by a data acquisition device in the prior art are single in type is solved, accordingly the efficiency data acquisition types of the electrical power efficiency monitoring terminal are enriched, the improvement of the efficiency data acquisition efficiency of the electrical power efficiency monitoring terminal is facilitated, and the improvement of the real-time performance of the electrical power efficiency monitoring system is facilitated.
Description
Technical field
The present invention relates to energy efficiency monitoring technical field, particularly a kind of electric power energy efficiency monitoring terminal and system.
Background technology
At present, for efficiency data acquisition, monitoring and the management of the high energy-consuming enterprises such as metallurgy, chemical industry, heating power, power plant, commercial center, mainly rely on the dissimilar harvesters such as flow (gas, steam, liquid flowmeter), pressure, temperature, electric power, power to realize separately.Therefore there is the defect that data acquisition type is single in these harvesters.
Summary of the invention
The embodiment of the present invention provides a kind of electric power energy efficiency monitoring terminal and system, has solved the single technical matters of data acquisition type of efficiency data collector in prior art.
The embodiment of the present invention provides a kind of electric power energy efficiency monitoring terminal, and it comprises: DC quantity data acquisition circuit, is connected with in-wiring, for gathering the efficiency data of the non electrical quantity type of in-wiring; Of ac data acquisition circuit, is connected with described in-wiring, for gathering the efficiency data of the electric weight type of in-wiring.
In one embodiment, described DC quantity data acquisition circuit comprises: sensor circuit, for changing the efficiency signal of the non electrical quantity type of in-wiring into analog quantity DC signal; Isolation transmit circuit, the input end of described isolation transmit circuit is connected with the output terminal of described sensor circuit, for the magnitude of voltage of analog quantity DC signal is adjusted; Modulus conversion chip, the analog quantity channel of described modulus conversion chip is connected with the output terminal of described isolation transmit circuit, for the analog quantity DC signal after voltage adjustment is converted to digital DC electric signal, and according to the corresponding relation of the efficiency data of default described digital DC electric signal and non electrical quantity type, obtain the efficiency data of non electrical quantity type.
In one embodiment, DC quantity data acquisition circuit comprises: front-end driven circuit, the output terminal of described front-end driven circuit is connected with the analog quantity channel of described modulus conversion chip, for controlling the sampling rate of the analog quantity channel of described modulus conversion chip.
In one embodiment, described of ac data acquisition circuit is also for carrying out power quality analysis according to the efficiency data of the electric weight type gathering.
In one embodiment, described of ac data acquisition circuit comprises: three-phase multifunctional computation chip RN8302.
In one embodiment, electric power energy efficiency monitoring terminal also comprises: control chip, be connected with described of ac data acquisition circuit with described DC quantity data acquisition circuit, for obtaining and analyze the efficiency data of described non electrical quantity type and the efficiency data of described electric weight type.
In one embodiment, described modulus conversion chip comprises transition enabled logic input pin, the corresponding one group of analog quantity channel of each transition enabled logic input pin, described control chip comprises universal input/output interface, the universal input/output interface of described control chip is connected with the transition enabled logic input pin of described modulus conversion chip, and described control chip also carries out data-switching or stops data-switching for controlling the analog quantity channel corresponding with transition enabled logic input pin.
In one embodiment, described control chip is F28M35H52C1RFPT double-core chip, wherein, described F28M35H52C1RFPT comprises ARM(Advanced RISC Machine, senior reduced instruction set computer machine) kernel and DSP(Digital Signal Processor, data signal processor) kernel, described ARM kernel is for the communication management of control chip, and DSP kernel is for the control operation of control chip.
In one embodiment, electric power energy efficiency monitoring terminal also comprises: memory circuit, the input end of described memory circuit is connected with data bus interface with the outer address bus of described control chip, the efficiency data of the non electrical quantity type of obtaining for storage control chip and the efficiency data of electric weight type.
In one embodiment, described memory circuit comprises: NAND512W3A2S chip and/or MT48LC8M8A2 chip.
In one embodiment, electric power energy efficiency monitoring terminal also comprises: communication interface, is connected with the asynchronous serial UART interface of control chip, for supporting described electric power energy efficiency monitoring terminal to carry out external data relaying and forwarding.
In one embodiment, described communication interface comprises: RS232 interface and or RS485 interface.
In one embodiment, electric power energy efficiency monitoring terminal also comprises: with the TFT(Thin Film Transistor of control chip, Thin Film Transistor (TFT)) interface connection, for the parts that carry out man-machine interaction for described electric power energy efficiency monitoring terminal.
In one embodiment, electric power energy efficiency monitoring terminal also comprises: L010-26D0512-04 power module, is used to described electric power energy efficiency monitoring terminal that power supply is provided.
In one embodiment, described L010-26D0512-04 power module, provides power supply for adopting from the three-phase electricity of described in-wiring up-sampling or civil power for described electric power energy efficiency monitoring terminal.
The embodiment of the present invention also provides a kind of electric power energy efficiency monitoring system, and it comprises: as above-mentioned electric power energy efficiency monitoring terminal as described in any; Monitoring main website, the efficiency data of electric weight type and the efficiency data of non electrical quantity type that for receiving and analyze electric power energy efficiency monitoring terminal, send.
In embodiments of the present invention, electric power energy efficiency monitoring terminal gathers the efficiency data of the non electrical quantity type of in-wiring by DC quantity data acquisition circuit, for example, flow (gas, steam, liquid flowmeter), pressure, humiture, the efficiency data such as power, and adopt of ac data acquisition circuit to gather the efficiency data of the ac electric type of in-wiring simultaneously, for example, electric current, the efficiency data such as voltage, the efficiency data of non electrical quantity type and the efficiency data of electric weight type that can gather in-wiring have been realized simultaneously, overcome the single problem of data collector image data type in prior art, thereby enriched the efficiency data acquisition type of electric power energy efficiency monitoring terminal, contribute to improve the efficiency that electric power energy efficiency monitoring terminal gathers efficiency data, contribute to improve the real-time of electric power energy efficiency monitoring system.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, does not form limitation of the invention.In the accompanying drawings:
Fig. 1 is the structured flowchart of a kind of electric power energy efficiency monitoring terminal of providing of the embodiment of the present invention;
Fig. 2 is the structured flowchart of a kind of DC quantity data acquisition circuit of providing of the embodiment of the present invention;
Fig. 3 is the circuit theory diagrams of a kind of modulus conversion chip ADS8528 chip of providing of the embodiment of the present invention;
Fig. 4 is the circuit theory diagrams of a kind of front-end driven circuit of providing of the embodiment of the present invention;
Fig. 5 is the circuit theory diagrams of a kind of computation chip RN8032 of providing of the embodiment of the present invention;
Fig. 6 is the circuit theory diagrams of a kind of FLASH chip NAND512W3A2S of providing of the embodiment of the present invention;
Fig. 7 is the circuit theory diagrams of a kind of SDRAM chip MT48LC8M8A2 of providing of the embodiment of the present invention;
Fig. 8 is the circuit theory diagrams of a kind of LO10-26D0512-04 power module of providing of the embodiment of the present invention;
Fig. 9 is the functional schematic of a kind of electric power energy efficiency monitoring terminal of providing of the embodiment of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in further details.At this, exemplary embodiment of the present invention and explanation thereof are used for explaining the present invention, but not as a limitation of the invention.
In embodiments of the present invention, provide a kind of electric power energy efficiency monitoring terminal, as shown in Figure 1, this electric power energy efficiency monitoring terminal comprises: DC quantity data acquisition circuit 101, is connected with in-wiring 103, for gathering the efficiency data of the non electrical quantity type of in-wiring; Of ac data acquisition circuit 102, is connected with described in-wiring 103, for gathering the efficiency data of the electric weight type of in-wiring.
In embodiments of the present invention, electric power energy efficiency monitoring terminal gathers the efficiency data of the non electrical quantity type of in-wiring by DC quantity data acquisition circuit, for example, flow (gas, steam, liquid flowmeter), pressure, humiture, the efficiency data such as power, and adopt of ac data acquisition circuit to gather the efficiency data of the electric weight type of in-wiring simultaneously, for example, electric current, the efficiency data such as voltage, the efficiency data of non electrical quantity type and the efficiency data of electric weight type that can gather in-wiring have been realized simultaneously, overcome the single problem of data collector image data type in prior art, thereby enriched the efficiency data acquisition type of electric power energy efficiency monitoring terminal, contribute to improve the efficiency that electric power energy efficiency monitoring terminal gathers efficiency data, contribute to improve the real-time of electric power energy efficiency monitoring system.
In specific implementation process, in order to gather the efficiency data of the non electrical quantity type of custom power inlet wire, as shown in Figure 2, above-mentioned DC quantity data acquisition circuit 101 can specifically be realized by sensor circuit 1011, isolation transmit circuit 1012 and analog to digital conversion core 1013.
During concrete enforcement, by sensor circuit, gather the efficiency signal of the non electrical quantity type of in-wiring, and change analog quantity DC signal into, by sensor, by non electrical quantity analog-signal transitions, be the analog quantity DC signal of 0-5V or 4-20mA, for example, the efficiency signal of this non electrical quantity type can be the signals such as flow (gas, steam, liquid flowmeter), pressure, humiture.
The analog quantity DC signal of exporting by sensor can not directly enter modulus conversion chip, need isolation transmit circuit to carry out current/voltage conversion and voltage range adjustment to analog quantity DC signal, general by the voltage limit value of analog quantity DC signal at 0-Vref(reference voltage Vref=3V) in scope, by isolating chip HCNR200, isolate again, then, then by analog electric signal voltage adjustment, after isolation input to the analog quantity channel of modulus conversion chip.
In the specific implementation, the analog quantity channel of modulus conversion chip is connected with the output terminal of isolation transmit circuit, for the analog quantity DC signal after voltage adjustment is converted to digital DC electric signal, and according to the corresponding relation of the efficiency data of default described digital DC electric signal and non electrical quantity type (for example, it is below the instantiation of corresponding relation of the efficiency data of digital direct flow signal and non electrical quantity type, the temperature sensor of take is example: 0-120 ° of corresponding 0-5V with the corresponding relation of d. c. voltage signal, 1 ° of corresponding voltage amount is 5/120V, the modulus conversion chip of the voltage signal of 0-5V by 12 is corresponding to 12 powers of 0-2, what 2 12 powers divided five is a voltage that digital quantity signal is corresponding, therefore, can find the corresponding relation of the efficiency data of digital quantity DC signal and non electrical quantity type), obtain the efficiency data of non electrical quantity type, the efficiency data of this non electrical quantity type are the efficiency data except the efficiency data of electric weight type.For example, this modulus conversion chip can adopt ADS8528 chip as shown in Figure 3, and chip supports automatic sleep mode to realize minimum power dissipation, and has the optional parallel or serial line interface output of daisy chain function; Chip nominal operation temperature range is-40 ℃ to+125 ℃.Possess internal reference voltage able to programme: 0.5V to 2.5V or 0.5V to 3.0V, support input voltage range up to ± 12V, C in Fig. 3
2be 10 μ F electric capacity; C
3be 0.1 μ F electric capacity; C
4be 0.47 μ F electric capacity; C
5be 0.1 μ F electric capacity; C
6be 1 μ F electric capacity.Electric power energy efficiency monitoring terminal mainly gathers alternating current-direct current semaphore by this part circuit.
At modulus conversion chip, carry out in the process of data-switching, in order to realize the sampling rate of controlling modulus conversion chip, can also on the analog quantity channel of modulus conversion chip, connect the sampling rate that front-end driven circuit carrys out control simulation amount passage, for example, front-end driven circuit as shown in Figure 4, this front-end driven circuit can be realized with amplifier OPA2211 chip, as ADS8528 simulating signal enter drive, makes ADS8528 keep maximum sampling rate.According to R
3, C
1the different choice different sampling rates of mating, for example, when sampling rate is 10KSPS, R
3select the resistance of 10K, C
1for 1nF electric capacity.R
1, R
2carry out the enlargement factor of control signal.
In the specific implementation, of ac data acquisition circuit 102 can be realized by computation chip the process of the efficiency data of the electric weight type that gathers in-wiring, this computation chip comprises three-phase voltage, three-phase current, zero-sequence current seven road sampling channels, INTN interrupt pin and SPI pin, the sampling channel of computation chip is connected with described in-wiring mutual inductor secondary side, gather the efficiency data of the electric weight type of in-wiring, by the SPI(Serial Peripheral Interface of the SPI pin of computation chip and control chip, Serial Peripheral Interface (SPI)) interface connects, by interrupt mode, the efficiency data of the electric weight type of collection are offered to control chip.
In specific implementation process, in order to reduce the software overhead of electric power energy efficiency monitoring terminal, computation chip in above-mentioned of ac data acquisition circuit 102 can adopt three-phase multifunctional computation chip RN8302 to realize, the circuit theory diagrams of computation chip as shown in Figure 5, RN8302 sampling channel comprises seven road ADC(current sample passages, voltage sample passage) and sampled-data processing circuit, IAP shown in Fig. 5, IAN, VAP and VAN pin are the sampling circuit of A phase current and voltage, wherein, the circuit of B phase and C phase is connected mutually identical with A.Wherein three tunnels are for the sampling of phase/line current for Ji Qi road ADC, and a road is for neutral line current sampling, and three tunnels are for phase/line voltage sample.Sampling channel adopts fully differential mode to input, and electric current, voltage channel peak signal input range are peak value 800mVpp.Computation chip is sampled the of ac collecting and calculate, and directly exists in inner buffer, by control chip, by SPI interface, is regularly read.Computation chip collection and calculating do not rely on the control of control chip, when control chip carries out program upgrade or renewal, do not affect sampled data and the power quality analysis of computation chip, computation chip still can work on, can not lose measurement data, therefore guaranteed that electric power energy efficiency monitoring terminal can, in the process of online upgrading, not lose or affect data sampling function.
In order to enrich the function of above-mentioned electric power energy efficiency monitoring terminal, above-mentioned of ac data acquisition circuit 102 can carry out power quality analysis according to the efficiency data of the electric weight type gathering by computation chip.RN8032 can measure meritorious, the reactive energy of all-wave, first-harmonic, and in 5000:1 dynamic range, nonlinearity erron < 0.1%, meets the accuracy requirement of national grid 0.5S and 0.2S level active electric energy meter; Can calculate all-wave, first-harmonic apparent electric energy are provided; Meritorious, reactive power direction is provided, supports idle four-quadrant judgement; There is shunt running start-up performance, start threshold value adjustable.RN8032 can measure meritorious, the idle and applied power of all-wave and first-harmonic; All-wave, first-harmonic and harmonic wave three-phase voltage, current effective value are provided; All-wave, phasor power factor are provided; Pressure-wire frequency is provided, and precision is 0.02 ° of <; Provide each phase fundamental voltage electric current phase angle, 0.02 ° of resolution precision <; Seven tunnel zero passage detection are provided, and zero passage threshold value can arrange; Provide voltage phase sequence false retrieval to survey; Decompression indication is provided, and decompression threshold value can arrange; Provide flexibly voltage, current waveform data cached; Provide voltage dip to detect; Overvoltage, over-current detection are provided.Computation chip also possesses calibration function, provides seven road ADC sensor gains calibrations, suitable power calibration; Provide seven road ADC channel phases to proofread and correct, wherein A, B, C tri-road current channels are supported segmentation phase correction; Power gain correction, phase correction are provided; Meritorious, idle, effective value offset correction is provided; Provide check and store device, to calibration data automatic Verification; Be applicable to phase three-wire three, three-phase four-wire system; 3.3V Power supply, has Power Supply Monitoring function.Built-in 1.25V ADC reference voltage, temperature coefficient representative value 20ppm/ ℃, also can external reference voltage.Have high speed SPI interface, transfer rate can reach 3.5Mbps, and writing protection function is provided; There is an interrupt output pin (INTN), can carry out data interaction by interrupt mode and control chip, improve the work efficiency of control chip.The operating voltage range of computation chip: 3.0V-3.6V; Operating temperature range :-40 ℃-85 ℃.
In specific implementation process, in order to meet the hardware requirement of electric power energy efficiency monitoring terminal, above-mentioned electric power energy efficiency monitoring terminal also comprises: control chip, be connected with described of ac data acquisition circuit with described DC quantity data acquisition circuit, for obtaining and analyze the efficiency data of described non electrical quantity type and the efficiency data of described electric weight type.This control chip can adopt F28M35H52C1RFPT double-core chip as shown in Figure 6 to realize, and F28M35H52C1RFPT chip has
cortex
tM-M3 and TMS320C28x
tMtwo cores of 32-Bit, wherein, ARM(Advanced RISC Machine, senior reduced instruction set computer machine) kernel can be used as communication management subsystem, its dominant frequency reaches 100MHz, and the FLASH of 512K and the RAM of 32K have been inherited in inside, and the RAM Shared of 64K; DSP(Digital Signal Processor, digital signal processor) kernel can be used as control subsystem, its dominant frequency reaches 150MHz, the FLASH of 512K and the RAM of 36K have been inherited in inside, and the RAM Shared of 64K, DSP core supports single-precision floating point type to calculate simultaneously, and the digital electric signal that can walk around after changing according to modulus conversion chip in Acquisition Circuit calculates with the corresponding relation of the efficiency data of non electrical quantity type, the efficiency data of the non electrical quantity type of acquisition in-wiring; The main Peripheral Interface of F28M35H52C1RFPT chip is as shown in table 1; Chip power supply power supply support 3.3V(IO), 1.8V(Analog), 1.2V(Digital).Integrated chip inner crystal oscillator, and support external clock input, there is dynamic PLL(Phasel Locked Loop, phase-locked loop) mechanism.Above feature makes this chip can meet the hardware requirement of electric power energy efficiency monitoring terminal.
Table 1
At modulus conversion chip, carry out in the process of data-switching, for example, modulus conversion chip is ADS8528 chip, ADS8528 chip is supported synchronized sampling, it is the high-precision modulus conversion chip of bipolarity, there is the sampling channel of eight 12, support the alternating voltage current sample of three-phase four-wire system and the collection of DC quantity, every channel sample maximum data rate is supported 480kSPS, these sampling channels can be divided into 4 pairs and control, every pair of sampling channel is corresponding with a transition enabled logic input pin, for example, control chip 104 be take F28M35 as example, the GPIO interface of F28M35 (General-Purpose IO ports, universal input/output interface) be connected with the transition enabled logic input pin CONVST_A/B/C/D of described modulus conversion chip, by the CONVST_A/B/C/D pin of control ADS8528, controlling corresponding sampling channel carries out data-switching or stops data-switching, data after conversion are by data bus DB[0:15] pin outputs in control chip F28M35 by parallel or serial mode, therefore can allow the sample rate of 650kSPS.Described modulus conversion chip comprises transition enabled logic input pin, the corresponding one group of analog quantity channel of each transition enabled logic input pin, described control chip comprises universal input/output interface, the universal input/output interface of described control chip is connected with the transition enabled logic input pin of described modulus conversion chip, and described control chip also carries out data-switching or stops data-switching for controlling the analog quantity channel corresponding with transition enabled logic input pin.
In realization, gather after the efficiency data of non electrical quantity type and the efficiency data of electric weight type simultaneously, in order to preserve the historical data of a large amount of multiple efficiency data for analyzing, above-mentioned electric power energy efficiency monitoring terminal can also comprise: memory circuit, the input end of memory circuit is connected with data bus interface with the outer address bus of described control chip, the efficiency data of non electrical quantity type and the efficiency data of electric weight type for storage control chip, obtained, to support above-mentioned electric power energy efficiency monitoring terminal can gather a large amount of data.
In specific implementation process, can realize in the following way memory circuit, by outer address bus and data bus interface expansion 512MFlash chip NAND512W3A2S chip and/or the 64MSDRAM chip MT48LC8M8A2 chip of control chip, as shown in Figure 6, NAND512W3A2S chip is supported byte (byte) addressing mode and writing protection function, data line and address wire are multiplexing, therefore, the data pin of the direct external bus interface EPI0 by F23M35 chip is directly linked on the data line of NAND512W3A2S, NAND512W3A2S controls read-write, address latch enables to be connected on the GPIO pin of F23M35 chip the work for control chip with the choosing of command latch enable and sheet and write-protected pin, FLASH chip one page (page) is supported 512+16 byte, and chip capacity reaches 512M byte, power supply is supported 3V or 1.8V, and under 3V condition of power supply, the time of random access only has 12us, and the time that page is wiped is 200us, chip operation temperature range is-40 to 85 ℃.This chip is supported Copy back program mode pattern, and chip, in a large amount of page data reproduction processes, does not need can directly complete through buffer memory; Improved the speed of data storages.Chip is by carrying out ECC(Error Correction Code, bug check and correction) code, can extend life-span of chip, the number of times of each piece programming/wipe is reached 100,000 times.
Once if the inner space of the operation of the MT48LC8M8A2 main circuit consideration program shown in Fig. 7 is inadequate, can utilize outside SDRAM(Synchronous Dynamic Random Access Memory, synchronous DRAM) working procedure.MT48LC8M8A2 chip hardware storage architecture is 2Meg * 8 * 4banks, altogether 64M storage space.The automatic refresh function of chip support; Its data pin is DQ0-DQ7, support byte mode, be connected on the data bus of EPI0 of F28M35, A0-A11 is on the address bus of the address wire pin of the chip EPI0 that is connected to F28M35, BA1 and BA0, for controlling BANK address pin, are mainly used to control and choose the BANK that is in a certain state.The defeated pin of order that the CAS of MT48LC8M8A2, RAS and WE pin are chip, CS is that chip slapper selects signal pins, CLK and CKE are that clock enables and clock input pin, and CLK needs a clock signal of F28M35 chip CLKOUT pin output, offers SDRAM chip.The power supply of MT48LC8M8A2 chip is 3.3V.Operating temperature range :-40 ℃ to+85 ℃.
In implementation process, in order to enrich the communication interface of electric power energy efficiency monitoring terminal, electric power energy efficiency monitoring terminal comprises: communication interface, asynchronous serial UART(Universal Asynchronous Receiver and Transmitter with control chip, UART Universal Asynchronous Receiver Transmitter) interface connects, for supporting electric power energy efficiency monitoring terminal to carry out external data relaying and forwarding.During concrete enforcement, can utilize 5 asynchronous serial UART interfaces of F28M35H52C1RFPT to expand respectively RS232 interface by level transferring chip MAX3232 and MAX3485, RS485 interface is supported external data relaying and is forwarded the integrated of required interface module, as infrared module, power carrier module, micro power radio module etc.Ethernet interface directly utilizes F28M35H52C1RFPT network interface Peripheral Interface to draw by network isolation transformer, can support Ethernet and Ethernet to turn the module integration of optical fiber.
In the specific implementation, above-mentioned electric power energy efficiency monitoring terminal can also comprise with the TFT interface of control chip and being connected, for the parts that carry out man-machine interaction for described electric power energy efficiency monitoring terminal, these parts can be button, indication LED (Light Emitting Diode, light emitting diode), LCD(Liquid Crystal Display, liquid crystal display) etc.
Electric power energy efficiency monitoring terminal can also be designed with digital-quantity input interface, is used for gathering some quantity of state situation of change; And controlled quentity controlled variable output loop, input and output loop isolates by light-coupled isolation chip.
In implementation process, for stable power supply being provided to electric power energy efficiency monitoring terminal, in the present embodiment, electric power energy efficiency monitoring terminal can also comprise L010-26D0512-04 power module, be used to all chips of electric power energy efficiency monitoring terminal that power supply is provided, this L010-26D0512-04 power module can adopt from the three-phase of described in-wiring up-sampling or civil power and provide power supply for described electric power energy efficiency monitoring terminal.380/220VAC(three-phase and four-line), appoint the power requirement that connects 2 linemans' works this modular power source can be worked exchanging under 65-460V or the super wide input voltage of direct current 90-650V, meets rated voltage:.When breaking down, electric power system produces in the superpotential situation of input, power supply automatic shutdown, and power supply and terminal all can be not damaged, improved the reliability of whole terminal operating.Power module input can reach and exchange 4000V output isolation voltage output, output, meets the requirements such as IEC/EN61000 standard " burst of pulses (4KV) ", " surge (2KV) ", " conduction, radiation EN55022Class B ".
As shown in Figure 8, L010-26D0512-04 power module front-end circuit mainly plays filtering, suppresses transient overvoltage and shove, be used for meeting the strict occasion of EMC Requirements, by diode, forming bridge circuit is used for meeting under three-phase three-wire system condition of power supply, a disconnected phase time electric power energy efficiency monitoring terminal can normally be worked, under three-phase four-wire system condition, the requirement that disconnected two-phase electric power energy efficiency monitoring terminal still can normally be worked.Power module has two-way output, and a road is direct current+5V, by LM1117 three-terminal voltage-stabilizing conversion chip output 3.3V power supply, provides the chip power of 3.3V supply voltage; Another road is direct current 12V, can, by power module URA2412YMD-6WR2 output ± 12 power supplys, provide the positive-negative power of amplifier for sampling and driving.In Fig. 8, concrete device parameters is as shown in table 2.
Table 2
| Element model | Recommendation |
| MOV | 20D911K |
| CX | 0.15μF |
| LDM | 56μH |
| LCM | 3mH |
| C 1、C 2 | 47μF/400VDC |
| R4、R5、R6、R7 | 560KΩ/1206 |
| D | 2A/1000V |
| R 1、R 2、R 3 | 5Ω/5W |
| FUSE | 3.15A/250V fusing, must connect slowly |
In the specific implementation, can realize electric power energy efficiency monitoring terminal as shown in Figure 9, the contour structures of electric power energy efficiency monitoring terminal can adopt general three-phase multifunctional electrical energy meter standard hanging type structure, and wide * height * thick size can be respectively: 174mm * 295mm * 82mm.Hardware circuit board is connected with electric power energy efficiency monitoring terminal enclosure with screw by draw-in groove.
The each several part structure of this electric power energy efficiency monitoring terminal is as shown in table 3.
Table 3
A kind of electric power energy efficiency monitoring system is provided in the present embodiment, and it comprises: above-mentioned arbitrary middle electric power energy efficiency monitoring terminal; Monitoring main website, the efficiency data of electric weight type and the efficiency data of non electrical quantity type that for receiving and analyze described electric power energy efficiency monitoring terminal, send.During concrete enforcement, electric power energy efficiency monitoring terminal can directly send to monitoring main website by the efficiency data of the efficiency data of electric weight type and non electrical quantity type by ethernet communication mode.When electric power energy efficiency monitoring terminal sends the efficiency data of electric weight type and the efficiency data of non electrical quantity type with communication modes such as RS485, need efficiency data acquisition unit to carry out relay forwarding, efficiency data acquisition unit can be controlled and regularly copies and accepts the data of electric power energy efficiency monitoring terminal collection or regularly in active, send function by setting electric power energy efficiency monitoring terminal, directly sends the data to efficiency data acquisition unit or forwards through trunk module.By adopting above-mentioned electric power energy efficiency monitoring terminal, avoid adopting distributing electric power energy monitoring device to form electric power energy efficiency monitoring system, thereby improved the real-time of electric power energy efficiency monitoring system, extensibility, reduce system building cost, be conducive to carrying out of the work such as national energy-saving reduction of discharging, DSM work and intelligent grid electric energy service management platform and power consumer energy efficiency monitoring system Construction.
In embodiments of the present invention, electric power energy efficiency monitoring terminal gathers the efficiency data of the non electrical quantity type of in-wiring by DC quantity data acquisition circuit, for example, flow (gas, steam, liquid flowmeter), pressure, humiture, the efficiency data such as power, and adopt of ac data acquisition circuit to gather the efficiency data of the electric weight type of in-wiring simultaneously, for example, electric current, the efficiency data such as voltage, the efficiency data of non electrical quantity type and the efficiency data of electric weight type that can gather in-wiring have been realized simultaneously, overcome the single problem of data collector image data type in prior art, thereby enriched the efficiency data acquisition type of electric power energy efficiency monitoring terminal, contribute to improve the efficiency that electric power energy efficiency monitoring terminal gathers efficiency data, contribute to improve the real-time of electric power energy efficiency monitoring system.
Obviously, those skilled in the art should be understood that, each module of the above-mentioned embodiment of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in memory storage and be carried out by calculation element, and in some cases, can carry out shown or described step with the order being different from herein, or they are made into respectively to each integrated circuit modules, or a plurality of modules in them or step are made into single integrated circuit module to be realized.Like this, the embodiment of the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the embodiment of the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (16)
1. an electric power energy efficiency monitoring terminal, is characterized in that, comprising:
DC quantity data acquisition circuit, is connected with in-wiring, for gathering the efficiency data of the non electrical quantity type of in-wiring;
Of ac data acquisition circuit, is connected with described in-wiring, for gathering the efficiency data of the electric weight type of in-wiring.
2. electric power energy efficiency monitoring terminal as claimed in claim 1, is characterized in that, described DC quantity data acquisition circuit comprises:
Sensor circuit, for changing the efficiency signal of the non electrical quantity type of in-wiring into analog quantity DC signal;
Isolation transmit circuit, the input end of described isolation transmit circuit is connected with the output terminal of described sensor circuit, for analog quantity DC signal is carried out to voltage adjustment;
Modulus conversion chip, the analog quantity channel of described modulus conversion chip is connected with the output terminal of described isolation transmit circuit, for the analog quantity DC signal after voltage adjustment is converted to digital DC electric signal, and according to the corresponding relation of the efficiency data of default digital DC electric signal and non electrical quantity type, obtain the efficiency data of non electrical quantity type.
3. electric power energy efficiency monitoring terminal as claimed in claim 2, is characterized in that, described DC quantity data acquisition circuit also comprises:
Front-end driven circuit, the output terminal of described front-end driven circuit is connected with the analog quantity channel of described modulus conversion chip, for controlling the sampling rate of the analog quantity channel of described modulus conversion chip.
4. electric power energy efficiency monitoring terminal as claimed in claim 1, is characterized in that, described of ac data acquisition circuit is also for carrying out power quality analysis according to the efficiency data of the electric weight type gathering.
5. electric power energy efficiency monitoring terminal as claimed in claim 1, is characterized in that, described of ac data acquisition circuit comprises: three-phase multifunctional computation chip RN8302.
6. electric power energy efficiency monitoring terminal as claimed in claim 2, is characterized in that, also comprises:
Control chip, is connected with described of ac data acquisition circuit with described DC quantity data acquisition circuit, for obtaining and analyze the efficiency data of described non electrical quantity type and the efficiency data of described electric weight type.
7. electric power energy efficiency monitoring terminal as claimed in claim 6, it is characterized in that, described modulus conversion chip comprises transition enabled logic input pin, the corresponding one group of analog quantity channel of each transition enabled logic input pin, described control chip comprises universal input/output interface, the universal input/output interface of described control chip is connected with the transition enabled logic input pin of described modulus conversion chip, and described control chip also carries out data-switching or stops data-switching for controlling the analog quantity channel corresponding with transition enabled logic input pin.
8. electric power energy efficiency monitoring terminal as claimed in claim 6, it is characterized in that, described control chip is F28M35H52C1RFPT double-core chip, wherein, described F28M35H52C1RFPT comprises senior reduced instruction set computer machine ARM kernel and data signal processor DSP kernel, described ARM kernel is for the communication management of control chip, and DSP kernel is for the control operation of control chip.
9. electric power energy efficiency monitoring terminal as claimed in claim 6, is characterized in that, also comprises:
Memory circuit, the input end of described memory circuit is connected with data bus interface with the outer address bus of described control chip, the efficiency data of the non electrical quantity type of obtaining for storage control chip and the efficiency data of electric weight type.
10. electric power energy efficiency monitoring terminal as claimed in claim 9, is characterized in that, described memory circuit comprises:
NAND512W3A2S chip and/or MT48LC8M8A2 chip.
11. electric power energy efficiency monitoring terminals as claimed in claim 6, is characterized in that, also comprise:
Communication interface, is connected with the asynchronous serial UART interface of control chip, for supporting described electric power energy efficiency monitoring terminal to carry out external data relaying and forwarding.
12. electric power energy efficiency monitoring terminals as claimed in claim 11, is characterized in that, described communication interface comprises:
RS232 interface and/or RS485 interface.
13. electric power energy efficiency monitoring terminals as claimed in claim 6, is characterized in that, also comprise:
Be connected with the Thin Film Transistor (TFT) TFT interface of control chip, for the parts that carry out man-machine interaction for described electric power energy efficiency monitoring terminal.
14. electric power energy efficiency monitoring terminals as described in any one in claim 1 to 13, is characterized in that, also comprise:
L010-26D0512-04 power module, is used to described electric power energy efficiency monitoring terminal that power supply is provided.
15. electric power energy efficiency monitoring terminal as claimed in claim 14, is characterized in that,
Described L010-26D0512-04 power module, provides power supply for adopting from the three-phase electricity of described in-wiring up-sampling or civil power for described electric power energy efficiency monitoring terminal.
16. an electric power energy efficiency monitoring system, is characterized in that, comprising:
Electric power energy efficiency monitoring terminal as described in any one in claim 1 to 15;
Monitoring main website, the efficiency data of electric weight type and the efficiency data of non electrical quantity type that for receiving and analyze described electric power energy efficiency monitoring terminal, send.
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| CN201310715024.0A CN103644942A (en) | 2013-12-23 | 2013-12-23 | Electrical power efficiency monitoring terminal and system |
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| CN201310715024.0A CN103644942A (en) | 2013-12-23 | 2013-12-23 | Electrical power efficiency monitoring terminal and system |
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Application publication date: 20140319 |