CN105021911A

CN105021911A - Intelligent energy-saving potential and electric energy quality diagnostic device for individual line user

Info

Publication number: CN105021911A
Application number: CN201410175079.1A
Authority: CN
Inventors: 李正佳; 余涛
Original assignee: Suzhou China Power Tech Corp Inc Of Section Of Paradise
Current assignee: Suzhou China Power Tech Corp Inc Of Section Of Paradise
Priority date: 2014-04-28
Filing date: 2014-04-28
Publication date: 2015-11-04

Abstract

The present invention provides an intelligent energy-saving potential and electric energy quality diagnostic device for an individual line user based on double TMS320F2812. The device continuously monitors and records energy consumption data of the individual line user online, and the recorded data is imported to a mobile memory via an external interface, and analyzed in detail by software of a host computer to obtain an energy-saving potential report of the individual line user. On the basis of the newest double-DSP configuration, high-precision A/D sampling technology, large-capacity storage technology and friendly man-machine interaction technology, the diagnostic device employs a scientific measuring means to ensure that electric energy data of the user to be detected is accurately automatically monitored and recorded online in real time; the diagnostic device is characterized by high sampling speed, calculation precision and intelligent level and easy operation; and the diagnostic device has a remote communication function, and thus, can be applied to enterprises information analysis and management systems of a higher level.

Description

A kind of individual line subscriber energy-saving potential and quality of power supply intelligent diagnosing instrument

Art

The present invention relates to the diagnosis of individual line subscriber energy-saving potential and power quality harnessed synthetically field, particularly relate to a kind of individual line subscriber energy-saving potential based on double T MS320F2812 and quality of power supply intelligent diagnosing instrument.

Background technology

Economizing on energy and electricity diagnosis as in energy auditing for the tentative diagnosis that business electrical situation and energy conservation potential are excavated, better can judge that enterprise produces power consumption, to enterprises building Potential model, scientific and reasonable electricity consumption, focus on the target such as power quality and Electrical Safety, be significant.

The data acquisition system (DAS) of large user's loaded termination of the marketing department of current grid company can obtain the overall electricity consumption situation of user, but large user's terminal cannot collect the detailed electricity consumption situation of user's interior distribution system and load.Find after visiting investigation early stage in a large number, the distribution system of most large user inside has only been joined a small amount of electric simulation instrument and without any memory function, has only been had the large enterprise of minority advanced person inside to have comparatively complete electric monitoring and data acquisition system (DAS).

Simultaneously, at the U.S. Fluke435 used on the market with put the electric energy quality monitors such as HOIKI3196 general price day all at about seven or eight ten thousand yuan, be unfavorable for that general small enterprise carries out energy-saving potential diagnosis and power quality harnessed synthetically, therefore can not commercially promote well.Invent a kind of individual line subscriber energy-saving potential based on two CSTR and quality of power supply intelligent diagnosing instrument, long-time Real-Time Monitoring and record are carried out to user's low-pressure side distribution system power consumption data, for upper computer software carries out the Data support that analyzing and diagnosing provides abundance.Utilize two CSTR interaction data treatment technology, modern power electronics technology, high-precision A/D Sampling techniques, man-machine interaction friendly interface technology, massive store technology etc. simultaneously, make this instrument have cost low, can easy to carry, sampling precision is high, calculating is accurate, strong operability, easily observe, can ultra-long time record continuously, the feature such as practical, effectively can solve the diagnosis of individual line subscriber energy-saving potential and the too high problem of power quality harnessed synthetically input cost.

Based on this, the invention provides a kind of individual line subscriber energy-saving potential based on double T MS320F2812 and quality of power supply intelligent diagnosing instrument.

Summary of the invention

The invention provides a kind of individual line subscriber energy-saving potential based on double T MS320F2812 and quality of power supply intelligent diagnosing instrument, greatly reduce the cost of the diagnosis of individual line subscriber energy-saving potential and power quality harnessed synthetically aspect, increase substantially the efficiency of electric energy-saving diagnostic work and power quality harnessed synthetically, the level of informatization and automaticity.

A kind of individual line subscriber energy-saving potential and quality of power supply intelligent diagnosing instrument, it comprises removable memory and the data acquisition unit be connected successively, data analysis unit, DSP peripheral functional modules; Removable memory is connected to described data analysis unit; Data acquisition unit is connected to individual line subscriber circuit to be measured;

Described data acquisition unit comprises sensing module, Signal-regulated kinase and A/D sampling module;

Described data analysis unit comprises 1#DSP data analysis chip and 2#DSP data analysis chip, and wherein, 1#DSP data analysis chip is connected to A/D sampling module; 2#DSP data analysis chip is connected to 1#DSP data analysis chip by SPI serial communication interface;

Described DSP peripheral functional modules comprises peripheral interface module, DSP peripheral expansion module, data read-write module and human-computer interaction module, and DSP peripheral functional modules is connected to the 2#DSP data analysis chip of described data analysis unit;

Described removable memory is connected to the peripheral interface module in DSP peripheral functional modules.

Further, described data acquisition unit comprises sensing module, Signal-regulated kinase and A/D sampling module;

Wherein, sensing module adopts Hall element CLSM-10mA, is used for high voltage transitions to become low voltage;

Signal-regulated kinase adopts frequency overlapped-resistable filter, OP4227 operational amplifier, comparer, phase-locked loop circuit, sampling holder and A/V change-over circuit, and this module carries out 256 frequencys multiplication to sample frequency;

A/D sampling module adopts MAX1324 chip, 14,8 passages, synchronized sampling ADC converter, has excellent dynamic perfromance and DC characteristic.

Further, the 1#DSP data analysis chip in described data analysis unit and 2#DSP data analysis chip adopt the TMS320F2812 chip produced with TI company;

Wherein, connected by SPI serial communication interface between 1#DSP data analysis chip and 2#DSP data analysis chip;

1#DSP data analysis chip is connected to A/D sampling module, and 2#DSP data analysis chip is connected to described DSP peripheral functional modules.

Further, described DSP peripheral functional modules comprises peripheral interface module, DSP peripheral expansion module, data read-write module and human-computer interaction module;

Wherein, peripheral interface module mainly adopts RS-232 interface, DC+5V interface, SD card interface and USB interface;

DSP peripheral expansion module mainly comprises RS232 telecommunication circuit, Peripheral clock circuit, extend out RAM circuit and extend out FLASH circuit, peripheral RS232 circuit adopts UART chip TL16C550 and SP3232 chip, Peripheral clock circuit adopts the serial clock chip DS1305 of Dallas company, extend out RAM circuit and adopt IS61LV25616AL chip, extend out FLASH circuit and adopt SST39VF800 chip;

Data read-write module mainly comprises reading and writing data circuit, SD card interface circuit and USB flash disk interface circuit, and reading and writing data circuit adopts CH376 file management chip, is connected with described 2#DSP;

Human-computer interaction module mainly comprises level shifting circuit, display module and input through keyboard circuit, and level shifting circuit adopts 74ALVC16245 chip, and display module adopts LCD12864 liquid crystal.

Further, between described 1#TMS320F2812 chip and 2#TMS320F2812 chip by the high-speed serial communication between high-speed serial communication Interface realization DSP and external unit or another DSP.

Further, utilize IS61LV25616AL chip and SST39VF800 chip to expand RAM and FLASH of described 1# and 2#DSP respectively, make DSP can perform Large Copacity program, store Large Volume Data.

Further, removable memory adopts Large Copacity SD card or USB flash disk, utilizes file management control chip CH376 read and write the monitoring record data volume at least one week and be stored in SD card or USB flash disk.

Individual line subscriber energy-saving potential based on double T MS320F2812 and the quality of power supply intelligent diagnosing instrument of this invention have following advantage:

1, this invention is based on two CSTR data chip TMS320F2812 framework, and one piece of DSP is specifically designed to control data collection, and one piece of DSP is specifically designed to and carries out analytical calculation, in real time display and store controlling to data.Two pieces of DSP share out the work and help one another, the communication between 1#DSP and 2#DSP is carried out by SPI high-speed serial communication interface, improve data acquisition, treatment and analysis speed, ensure high precision, quick detection and process every data, comprise three-phase and neutral voltage electric current, power factor (PF), active power, reactive power, applied power, voltage deviation, frequency departure, fundamental power factor, imbalance of three-phase voltage, three-phase current unbalance, each electric current and voltage harmonic content, the parameters of electric power such as each harmonic aberration rate, for the diagnosis of individual line subscriber energy-saving potential and power quality harnessed synthetically analysis software provide accurate, detailed supported data, have great importance to fully excavating individual line subscriber energy-saving potential and solving power quality problem.

2, the present invention adopts MAX1324 chip as AD sampled data chip, measuring accuracy is high, slewing rate is fast, switching time greatly reduces, and decrease the complexity of AD conversion chip hardware setting and Software for Design, by 1#DSP, synchronous ADC conversion and control is implemented to AD sampling A/D chip, ensure that sample-synchronous is carried out and 128 points of sampling in one-period.

3, utilize Zero-cross comparator and the phase locking frequency multiplying method of sampling, asynchronous sampling and period measurement error can be eliminated on the impact of measuring accuracy.

4, chip type selecting is considered from cost control and system optimization, utilize two CSTR framework, make full use of DSP Resources on Chip and peripheral hardware resource, make instrument efficiently brief, possess and measure the diagnosis of individual line subscriber energy-saving potential and the supported data needed for power quality harnessed synthetically, compare Fluke series on the market and put 3196 serial power quality analyzers day, cost reduces much.

5, this invention adopts Large Copacity SD card or USB flash disk, flexible and changeable, and it is removable, can the individual line subscriber low-pressure side distribution system online monitoring data of massive store more than one week, make the copy of Monitoring Data more convenient, for upper computer software provides the record data of the aspects such as enough user power utilization situation, the quality of power supply and energy consumption, and realize the diagnosis of individual line subscriber energy-saving potential and electric energy and comprehensive quality control local analysis, produce for individual line subscriber enterprise, tool has very important significance.

Accompanying drawing explanation

Fig. 1 be an embodiment based on the individual line subscriber energy-saving potential of double T MS320F2812 and the system principle diagram of quality of power supply intelligent diagnosing instrument.

Fig. 2 is that this practicality is new for the individual line subscriber energy-saving potential of double T MS320F2812 and each functional block diagram of system of quality of power supply intelligent diagnosing instrument.

Fig. 3 is that this practicality is new for the individual line subscriber energy-saving potential of double T MS320F2812 and master-slave controller (two CSTR) the serial communication schematic diagram of quality of power supply intelligent diagnosing instrument.

Fig. 4 is that this practicality is new for the individual line subscriber energy-saving potential of double T MS320F2812 and the data sampling schematic diagram of quality of power supply intelligent diagnosing instrument.

Fig. 5 is that this practicality is new for the individual line subscriber energy-saving potential of double T MS320F2812 and the data analysis schematic diagram of quality of power supply intelligent diagnosing instrument.

embodiment

Below in conjunction with accompanying drawing, this practicality is newly described in detail based on the individual line subscriber energy-saving potential of double T MS320F2812 and the embodiment of quality of power supply intelligent diagnosing instrument.

Fig. 1 be an embodiment based on the individual line subscriber energy-saving potential of double T MS320F2812 and the system principle diagram of quality of power supply intelligent diagnosing instrument, shown in Figure 1.

Invention is by data acquisition unit, and data analysis unit, DSP peripheral functional modules, removable memory four part forms.Wherein, data analysis unit comprises sensing module, Signal-regulated kinase and A/D sampling module; Data analysis unit comprises 1# and 2#DSP data analysis chip; DSP peripheral functional modules comprises peripheral interface module, DSP peripheral expansion module, data read-write module and human-computer interaction module.The present invention is by sensing module, gather individual line subscriber low-pressure side distribution system circuit three-phase voltage to be measured, electric current and neutral voltage electric current, and carry out a series of process such as anti-aliasing filter, operation amplifier, Zero-cross comparator, synchronizing and frequency doubling, sampling maintenance through Signal-regulated kinase, in the process of process, three-phase voltage after anti-aliasing filter process and a neutral voltage signal part are through OP4227 operational amplifier, a part is through comparer and phaselocked loop, and common sampling holder of sending into carries out sampling maintenance; Three-phase after anti-aliasing filter process and neutral voltage signal also deliver to sampling holder after the process of OP4227 operational amplifier, and send into CH4, CH5, CH6, CH7 tetra-voltage analog input channels of the MAX1324 sampling A/D chip of A/D sampling module with 4 road voltage signals (UA, UB, UC, UN) after sampling holder process; And three-phase after sampling holder process and neutral line current signal become four-way voltage mode signals (M_IA, M_IB, M_IC, M_IN) after carrying out A/V conversion process by A/V change-over circuit, and be sent to CH0, CH1, CH2, CH3 tetra-current-mode analog quantity input channels of the MAX1324 sampling A/D chip of A/D sampling module.This eight road analog input signal (UA, UB, UC, UN, M_IA, M_IB, M_IC, M_IN) is after high precision fast A/D conversion, the 1#DSP in data analysis unit is sent to 12 (DB0 ~ DB11) digital signals, the I/O mouth of 1#DSP sends control signal by stripping and slicing control circuit control voltage and current amplification factor simultaneously, carries out synchronous A/D conversion and control to A/D sampling module simultaneously.This 12 railway digital signal is delivered to 2#DSP by high speed SPI serial communication interface by 1#DSP, the 74ALVC16245 level shifting circuit that this 12 railway digital signal sends into human-computer interaction module is controlled by 2#DSP, these digital signals carry out latch buffered in the circuit, show these basic electric parameters parameters finally by Liquid Crystal Module, operate liquid crystal display and preservation by button inputting circuits, instrument parameter is set simultaneously.This 12 position digital signal is stored in through 2#DSP chip controls and extends out RAM(and realized by IS61LV25616 chip in addition) in, and by the CH376 file management chip in control data module for reading and writing by the reading and writing data that extends out in RAM to SD card or USB flash disk, extend out FLASH(simultaneously and realized by SST39VF800 chip) be used for storing Large Copacity computing program.Dsp chip improves outside accurate clock through DS1305 clock circuit, for apparatus measures record provides precise time; #DSP chip carries out RS232 data communication through SP3232 communication chip simultaneously, contacts upper machine data management system.Through SPI high-speed serial communication interface, 1#DSP passes to 12 position digital signals of 2#DSP, Fast Fourier Transform (FFT) (FFT) Treatment Analysis is carried out after digital filtering, processing signals is decomposed into each harmonic voltage and current, the LCD12864 Liquid Crystal Module of each electric parameters parameter on the one hand in human-computer interaction module that Treatment Analysis obtains shows, and reads and writes in outside SD card or USB flash disk removable memory on the other hand through CH376 file management chip from extending out RAM.So, RAM and FLASH of 2#DSP is expanded by IS61LV25616 chip and SST39VF800 chip, to store Large Volume Data and calculation procedure.The massive store function of SD card or USB flash disk ensures that instrument can record the data volume at least one week continuously, makes this instrument have the function of pluggable mobile storage simultaneously.

2#DSP carries out real-time computing to the data from 1#DSP, can realize three-phase voltage, current signal real-time follow-up, real-time calculating voltage effective value, current effective value, electric current and voltage tri-phase unbalance factor, active power, reactive power, applied power, frequency, power factor and analysis stable state harmonic wave.These electric parameters parameters through communication module GRPS radio communication or import in the analysis of host computer energy-saving potential and power quality harnessed synthetically simulation software through SD card, USB flash disk, this software is write based on Matlab emulation platform, user's energy-saving potential analysis report and comprehensive power quality analysis report can be derived, comprise voltage fluctuation and flicker, voltage deviation, 1 ~ 25 electric current and voltage harmonic wave, the power quality index control measures such as three-phase imbalance.

The present invention is based on two CSTR framework, and adopt modern power electronics technology, high-precision A/D Sampling techniques, man-machine interaction friendly interface technology, massive store technology etc., make this instrument have cost low, can easy to carry, sampling precision is high, calculating is accurate, strong operability, easily observe, can ultra-long time record continuously, the feature such as practical, effectively can solve the diagnosis of individual line subscriber energy-saving potential and the too high problem of power quality harnessed synthetically input cost

Fig. 2 is that this practicality is new for the individual line subscriber energy-saving potential of double T MS320F2812 and each functional block diagram of system of quality of power supply intelligent diagnosing instrument, shown in Figure 2.

4 parts are comprised: data acquisition unit, data analysis unit, DSP peripheral functional modules and removable memory based on the individual line subscriber energy-saving potential of double T MS320F2812 and quality of power supply intelligent diagnosing instrument.Wherein, data acquisition unit comprises sensing module, Signal-regulated kinase and A/D sampling module; Data analysis unit comprises 1#DSP and 2#DSP data analysis chip; DSP peripheral functional modules comprises peripheral interface module, DSP peripheral expansion module, data read-write module and human-computer interaction module; Removable memory comprises SD card or USB flash disk.Concrete each functions of modules describes in detail as follows.

Sensing module acquires circuit three-phase voltage to be measured, electric current and neutral voltage, electric current, and change high voltage, big current into low-voltage, small area analysis, and be incorporated into instrument sampling plate;

Signal-regulated kinase is to the 4 road low voltage signals from sensing module, small area analysis signal carries out anti-aliasing filter and operation amplifier, wherein 4 road voltage signals are delivered to sampling holder after anti-aliasing filter and operation amplifier, 4 road current signals are after anti-aliasing filter and operation amplifier, carry out sending into sampling holder after synchronizing and frequency doubling 256 process through comparer and phaselocked loop, the cycle control signal that the frequency-doubled signal obtained is sampled as A/D, achieve in a power frequency period and gather 256 points, i.e. 12.8kSPS, and are sync interval samplings between these 256 points, ensure that real-time and the reliability of measurement data.Enter A/D sampling A/D chip from sampling holder 4 road voltage signals out, 4 road current signals then convert 4 road voltage mode signals to through A/V change-over circuit, and enter A/D sampling A/D chip.Therefore, send into A/D sampling A/D chip with 8 road voltage mode signals after Signal-regulated kinase realizes carrying out a series of process such as anti-aliasing filter, operation amplifier, Zero-cross comparator, synchronizing and frequency doubling, sampling maintenance to 4 road voltages, current signal and carry out ADC conversion;

A/D sampling module is converted to 12 position digital signal DB0 ~ DB11 to 8 channel analog signals from Signal-regulated kinase.1#DSP synchro control A/D sampling A/D chip, ensures to sample 256 points in one-period inter-sync, thus makes measurement data have real-time effectiveness.

The sheet choosing of 1# DSP control A/D sampling A/D chip and read-write, synchronous conversion and control is implemented to A/D sampling A/D chip, one-period inter-sync is sampled 256 points, the order of magnitude of the current signal simultaneously detected according to 1#DSP, control instrument amplifier switches to corresponding enlargement factor is amplified, realizing range switching by changing gain enlargement factor, ensureing measure linear degree and the precision of the current signal of each order of magnitude.14 digital signals from A/D sampling A/D chip, while real-time control voltage current sample passage and A/D sampling A/D chip, are delivered to 2#DSP by SPI high-speed synchronous communications serial interface and carry out next step computing by 1#DSP.

2#DSP carries out digital filtering and fast Fourier (FFT) Treatment Analysis to 12 position digital signals from 1#DSP, can realize three-phase voltage, current signal real-time follow-up, real-time calculating voltage effective value, current effective value, electric current and voltage tri-phase unbalance factor, active power, reactive power, applied power, frequency, power factor and analysis stable state harmonic wave.These basic electric parameters parameters are shown by the Liquid Crystal Module in human-computer interaction module on the one hand, are stored on the other hand and extend out in RAM, and read and write in outside removable memory by CH376 file management chip.

Peripheral interface module will for the invention provides various interface function.Wherein, SD card interface, for inserting SD card, stores data; USB interface inserts the removable memories such as USB flash disk; RS232 Interface realization data communication function; DC+5V interface provides ﹢ 5V direct supply for instrument, ensures that instrument normally works.

DSP peripheral expansion module major function comprises, one is utilize UART chip TL16C550 and SP3232 chip to realize RS232, RS485 wire communication mode and GPRS wireless communication mode, for providing reliably between Digital Circuit-terminating Equipment (DCE) and data terminal equipment (DTE), interface service flexibly; Two is adopt the serial realtime clock chip DS1305 of Dallas company to provide outside accurate clock signal for instrument; Three is utilize IS61LV25616AL chip and SST39VF800 chip expansion RAM and FLASH respectively, makes 2#DSP can massive store Monitoring Data and calculation procedure;

Data read-write module adopts CH376 file management chip to be connected with 2#DSP, realization is selected the sheet of CH376 chip, Read-write Catrol, by the reading and writing data that extends out in RAM in removable memory, wherein, CH376 file management chip is connected with described USB flash disk interface circuit, and itself D-and D+ port controlling USB flash disk is read and write; CH376 file management chip is connected with described SD card interface circuit, and its SD_CS, SD_D0, SD_CK, SD_DI port controlling SD card is read and write, and 2#DSP monitoring record and calculating data is stored in USB flash disk and SD card respectively.

In human-computer interaction module, level shifting circuit input interface is connected to described 2#DSP chip, and its output interface is connected to Liquid Crystal Module.Button inputting circuits is connected to level shifting circuit input interface, controls display module.Liquid Crystal Module is connected to level shifting circuit.The digital signal that will show is exported by level shifting circuit, and shown by Liquid Crystal Module, these digital signals shown comprise various to analyzing the useful electric data of user's energy consumption condition, comprise three-phase voltage, three-phase current, three phase power, power factor etc.

Removable memory comprises SD card and USB flash disk, can massive store instrument monitoring record data, for upper computer software provides powerful basic data support.

Below be namely for Fig. 2, each functions of modules is introduced.Work in coordination between modules, ensure individual line subscriber low-pressure side distribution system power consumption data and power quality data real-time storage and be uploaded to host computer energy conservation potential to analyze and power quality harnessed synthetically simulation software, draw user's energy-saving potential analysis report and power quality harnessed synthetically analysis report fast.

Fig. 3 is that this practicality is new for the individual line subscriber energy-saving potential of double T MS320F2812 and master-slave controller (two CSTR) the serial communication schematic diagram of quality of power supply intelligent diagnosing instrument, shown in Figure 3.

In the present invention, between 1#DSP and 2#DSP, carry out data transmission with serial communication mode.Two DSP run under work in series mode, and this work in series mode can pass through DSP serial ports or DMA, also can pass through dual port RAM, FIFO, and even public internal memory realizes.Also can oneself extended serial port and DMA passage, and dual port RAM, FIFO and public internal memory are all generally expanded by user to form.Under serial communication mode, utilize dsp chip itself with serial port resource communicate.This kind of communication mode connects simple, and strong security, does not increase any fringe cost.Now for the communication connection shown in Fig. 3 between 2 controllers and the functional block diagram that uses.SPI and SCI two kinds of serial communication interfaces between 1#DSP and 2#DSP are described.

SPI is a high-speed serial communication interface, can realize the high-speed serial communication between DSP and external unit or another DSP.Often use the shift register of SPI interface and expanding peripherals in application, the peripheral communications such as LCD display and ADC, also can adopt the communication that master/slave pattern realizes between multiprocessor.

In figure 3, SPI interface has and advocates peace from 2 kinds of operator schemes.Main controller controls SPICLK signal, it can start data at any time and send.

Be operated under holotype, SPI at SPICLK pin for whole serial communication network provides clock.Data export from SPISIMO pin, and latch the data that SPISOMI pin inputs.The speed of the data transmission of SPIBRR register determination communication network, can configure 126 kinds of different data transmission rates by SPIBRR register.Write data to SPIDAT or SPITXBUF register, the data started on SPISIMO pin send, and that first send is highest significant position (MSB).Meanwhile, the data of reception move into the least significant bit (LSB) of SPIDAT by SPISOMI pin.After transferring specific figure place, the data received are sent to SPIRXBUF, read in order to CPU.

From in pattern, SPISOMI pin is data output pins, and SPISIMO pin is data-out pin.SPICLK is the input of serial-shift clock.When the appropriate clock edge of the SPICLK signal from SPI equipment Inspection arrival autonomous controller, the data having write SPIDAT or SPITXBUF register are sent on network.After all displacements sending character go out SPIDAT register, the data being written to SPITXBUF register will be sent to SPIDAT register.In order to can data be received, wait for that master controller sends SPICLK signal from SPI equipment, then the data on SPISIMO pin are moved in SPIDAT register.

Serial communication interface SCI adopts the asynchronous serial communication interface of dual-wire communications, the UART asynchronous communication model of support standard, and adopt NRZ (no-return-zero) data layout, can be communicated with DSP or other asynchronous peripheral by serial line interface.SCI receiver and transmitter have oneself independent enable and interrupt bit, independently can operate, also can operate in a full-duplex mode simultaneously.For ensureing data integrity, SCI module is interrupted the data received, polarity, transfinite and error-detecting.By programming to the baud rate control register of 16, configure different SCI traffic rates.SCI module supports multiprocessor communication, has 2 kinds of communication protocols: idle line multi-processor mode and address bit multi-processor mode, and these 2 kinds of agreements allow between multiprocessor, carry out effective data transmission.Meanwhile, SCI additionally provides Universal Asynchronous Receive/transmission (UART) communication pattern, can communicate with the multiple peripheral hardware with standard serial port.Here introduce no longer in detail.

Fig. 4 is that this practicality is new for the individual line subscriber energy-saving potential of double T MS320F2812 and the data sampling schematic diagram of quality of power supply intelligent diagnosing instrument, shown in Figure 4.

This schematic diagram detail display principle of instrument work first half and signal sampling, the sampling of this part signal comprises sensing module, Signal-regulated kinase, A/D sampling module and 1#DSP data analysis chip.The total principle of work of this part is described as: by described sensing module acquires individual line subscriber low-pressure side distribution system circuit three-phase voltage to be measured, electric current and neutral voltage, electric current, and carry out a series of sampling conditioning such as anti-aliasing filter, operation amplifier, Zero-cross comparator, synchronizing and frequency doubling, sampling maintenance process through Signal-regulated kinase, after process, three-phase voltage sends into CH4, CH5, CH6, CH7 tetra-voltage analog input channels of the MAX1324 sampling A/D chip of A/D sampling module after sampling holder process with 4 road voltage signals (UA, UB, UC, UN); And the three-phase current signal after sampling holder process becomes the voltage mode signals (M_IA, M_IB, M_IC, M_IN) of four-way and is sent to CH0, CH1, CH2, CH3 tetra-current-mode analog quantity input channels of the MAX1324 sampling A/D chip of A/D sampling module after carrying out A/V conversion by A/V change-over circuit.This eight road analog input signal (UA, UB, UC, UN, M_IA, M_IB, M_IC, M_IN) is changed Hou Yi 12 tunnel (D1-D12) digital signal through high-precision rapid A/D and is sent to 1#DSP core data process chip, carries out sending into 2#DSP by SPI high-speed serial communication interface after a series of processing controls to be for further processing analysis through 1#DSP chip.

Just Fig. 4 describes this schematic diagram inner structure and function in detail below.

Described sensing module comprises current clamp (containing AGND), voltage clamp (containing earth terminal UN), Hall element, magnifier and control switching circuit.Wherein, current clamp adopts KVL type current clamp, and ER effect is than being 4000:1, and pincers are on the three-phase bus of circuit to be measured, and on ground current pincers pincers to line neutral to be measured, line current flow direction and current clamp positive dirction meet the right-hand rule; 50A type spring clamp selected by voltage clamp, and for introducing circuit three-phase voltage to be measured to instrument, be connected on the bus bar of circuit to be measured, ground voltage clamping connection is to the earth terminal of equipment under test; Hall element adopts JLB-16 type, is used for high voltage to convert low-voltage to, and this linear sensor output, high precision, fast response time, antijamming capability by force, are connected to three-phase voltage folder and three-phase current clamp signal output terminal; Control switching circuit, be connected to magnifier, the order of magnitude of current signal can be detected according to 1#DSP core data analysis chip, control instrument amplifier switches to corresponding enlargement factor is amplified, realizing range switching by changing gain enlargement factor, ensureing measure linear degree and the precision of the current signal of each order of magnitude; Magnifier, be connected between voltage current transformer and frequency overlapped-resistable filter, there is the high and low power consumption of precision, common-mode rejection ratio is high, working band is wide feature, adopt the mode of multistage amplification, filtering, current signal is amplified step by step, filtering step by step, the impact of effective suppression undesired signal and noise, improves precision and the signal to noise ratio (S/N ratio) of sampling.

Described Signal-regulated kinase comprises: frequency overlapped-resistable filter, OP4227 operational amplifier, comparer, phaselocked loop, sampling holder, A/V change-over circuit etc.Wherein, frequency overlapped-resistable filter, operational amplifier, sampling holder form voltage signal conditioning circuit; Frequency overlapped-resistable filter, comparer, phaselocked loop, operational amplifier, A/V change-over circuit form current signal conditioning circuit.Voltage signal conditioning circuit, carries out anti-aliasing low-pass filtering, operation amplifier and sampling to three-phase voltage signal and keeps process.On voltage signal band after process, voltage ground signals UN forms 4 road voltage signals jointly, is input to A/D sampling A/D chip; Meanwhile, a road current signal conditioning circuit is formed by frequency overlapped-resistable filter, OP4227 operational amplifier, sampling holder.From frequency overlapped-resistable filter current signal out, be input in sampling holder again after comparer and phaselocked loop, thus form another road current signal conditioning circuit.Two-way current signal is input to A/V change-over circuit jointly after sampling holder keeps.Inner structure is described below.

Wherein, frequency overlapped-resistable filter adopts 4 rank Butterworth low-pass filters, and is connected to sampling holder by operational amplifier; Operational amplifier adopts OP4227 operation amplifier chip, carries out operation amplifier process to the three-phase voltage current signal processed after filtering, ensures accurately to sample; Comparer adopts Zero-cross comparator circuit, and frequency multiplication of phase locked loop circuit is made up of CD404, CD4040, and CD4046 is universal CMOS phase-locked loop intergrated circuit, is made up of linear voltage controlled oscillator, 2 phase comparators and low-pass filter circuit.By the frequency division effect of CD4040 chip, this frequency multiplication of phase locked loop circuit is made to carry out real-time follow-up to from Zero-cross comparator circuit pulse voltage signal out, when tested voltage signal frequency change, circuit from motion tracking and quick lock in signal, ensure all the time sample frequency by 256 times of survey line frequency; A/V change-over circuit comprises OP4227 operational amplifier and A/V switch, for converting the three-phase current signal keeping out of sampling to voltage-type channel signal; A/V switch adopts CD4052 chip, controls current mode signal and changes to voltage mode signals, carry out ADC conversion to be sent to A/D sampling module.

Described A/D sampling module mainly comprises: A/D sampling A/D chip.This A/D sampling A/D chip adopts MAX1324 chip, is 8 input channels, 14 high speeds, synchronized sampling ADC converters, is connected between Signal-regulated kinase and 1#DSP.Its feature is: can provide ± 5V or 0 to+5V simulates discrepancy scope, can provide ± the overvoltage protection of 16.5V, have fast, the excellent dynamic perfromance of switching rate and acquisition precision; There is (T/H) circuit of independently sampling/keep sample for each passage provides simultaneously; Sample rate is high, and the time of changing 8 passages can reach 3.8 us, and the handling capacity of every passage reaches 250kps; Bipolarity inputs, and without the need to negative supply, provides+16.5V overvoltage protection; Have that advanced person/first going out (FIFO) function can reduce interface overhead, and transformation result can be read between EOC or conversion; Without the need to calibration, 14 of 16.6MHz directly can be connected with high-speed CPU for two-way simultaneous interface; The configuration register etc. that inside is integrated with S/H ,+2.5V reference voltage that bandwidth is 10MHz, internal clocking, 8 × 14 is SRAM and gating sampling channel; Dynamic perfromance: SFDR=90dBc, SINAD=76.5dB, DC precision is ± 2LSB INL, ± ILSBDNL; Expansion level temperature range (-40 DEG C ~+85 DEG C) can be operated in.

8 channel analog signals, as the kernel processor chip of this A/D sampling module, can be converted to 12 position digital signals by MAX1324.The analog input signal of 8 passages is M_IA, M_IB, M_IC, M_IN and CH_UA, CH_UB, CH_UC, CH_UN, be input to CH0 to the CH7 passage of MAX1324 chip respectively, due to the quick sampling performance of MAX1324, ensure that the real-time effectiveness of measurement data, selected and read-write by the sheet of 1#DSP control MAX1324, ensure that one-period inter-sync is sampled 256 points by DSP data analysis chip.

The schematic diagram of data sampling shown in Fig. 4 also comprises: 1#DSP.1#DSP adopts TMS320F2812 data analysis chip, is connected with described A/D sampling A/D chip, is connected with 2#DSP simultaneously.1#DSP major function comprises: one is sheet choosing and the read-write of control A/D sampling A/D chip, implements synchronous conversion and control, one-period inter-sync is sampled 256 points to A/D sampling A/D chip; Two is the orders of magnitude according to the current signal detected, control instrument amplifier switches to corresponding enlargement factor is amplified, and realizing range switching, ensureing measure linear degree and the precision of the current signal of each order of magnitude by changing gain enlargement factor; Three is real-time control voltage current channel enlargement factor and A/D sampling A/D chip while, by SPI high-speed synchronous communications serial interface, digital signal transfers is carried out next step computing to 2#DSP.

Fig. 5 is that this practicality is new for the individual line subscriber energy-saving potential of double T MS320F2812 and the data analysis schematic diagram of quality of power supply intelligent diagnosing instrument, shown in Figure 5.

This schematic diagram detail display principle of instrument work latter half and data analysis, this partial data analysis comprises 2#DSP, DSP peripheral expansion module, data read-write module, human-computer interaction module, peripheral interface module and removable memory.The total principle of work of this part is described as: digital signal is delivered to 2#DSP by SPI high-speed serial communication interface by 1#DSP, 2#DSP carries out digital filtering and fast Fourier (FFT) Treatment Analysis to 12 position digital signals, can realize three-phase voltage, current signal real-time follow-up, real-time calculating voltage effective value, current effective value, electric current and voltage tri-phase unbalance factor, active power, reactive power, applied power, frequency, power factor and analysis stable state harmonic wave.These basic electric parameters parameters are shown by the LCD12864 in human-computer interaction module on the one hand, are stored on the other hand and extend out in RAM, and read and write in outside removable memory by CH376 file management chip.Be described in detail as follows with regard to each modular structure and function thereof in data analysis schematic diagram shown in Fig. 5 below.

Described 2#DSP also comprises the peripheral interface circuit be connected with DSP, 2#DSP is as core data process chip, be connected between 1#DSP and human-computer interaction module, data read-write module, DSP peripheral expansion module, be respectively these three modules and provide chip selection signal and FFT digital processing signal, control data module for reading and writing reads and writes data in SD card and USB flash disk; Control the level shifting circuit in human-computer interaction module, the data of DSP process are shown by Liquid Crystal Module; Realize the function of DSP peripheral expansion module.The TMS320F2812 chip that 2#DSP adopts TI company to produce, it is 32 fixed-point DSP chip of a high-performance for controlling, multi-functional, high performance-price ratio, the highlyest can work under 150MHz.This chip has a large amount of controlled GPIO mouths, the connection of convenient control and peripheral circuit; Chip integration is very high, fast operation, has remarkable digital signal processing capability, is the most frequently used chip platform in Digital Signals field.2#DSP utilizes FFT fast Fourier algorithm to calculate the frequency of first-harmonic and each harmonic, voltage, amplitude and phase place, and each phase active power, reactive power, applied power, power factor and each harmonic aberration rate, resultant distortion rate etc. parameters of electric power.

Fast Fourier Transform (FFT) (FFT) is a kind of variation time-domain signal being changed into frequency-region signal, is in digital signal processing be a kind of method often adopted to signal analysis.Utilize Fast Fourier Transform (FFT) (FFT) method the first-harmonic of the electric current and voltage of sampling can be separated with each harmonic, and calculate required fundametal compoment and each harmonic component respectively, and then calculate the electric power basic parameter such as active power, reactive power, applied power, fundamental power factor, three-phase imbalance of electric current and voltage.

Described DSP peripheral expansion module comprises: RS232 telecommunication circuit, Peripheral clock circuit, extend out RAM circuit and extend out FLASH circuit;

Described RS232 telecommunication circuit, extend out RAM circuit and extend out FLASH circuit and described dsp chip is interconnected, described RS232 telecommunication circuit adopts UART chip TL16C550 and SP3232 chip, its adopts RS232, RS485 wire communication mode and GPRS wireless communication mode, its major function be for providing reliably between Digital Circuit-terminating Equipment (DCE) and data terminal equipment (DTE), interface service flexibly.Communicated with monitoring equipment by RS232 or RS485 interface, the function of transmission measurement data and Real-Time Monitoring, on-line monitoring is provided.Meanwhile, this data communication function also can realize with bluetooth module, makes data can wireless transmission, improves detection efficiency, saves detection time; Described Peripheral clock circuit adopts the serial realtime clock chip DS1305 of Dallas company, for energy-saving diagnosis instrument provides outside accurate clock, facilitates instrument record Monitoring Data.DS1305 is the real-time clock of serial, band alarm clock, is also the decimal system (BCD) time-of-day clock of full binary coding, can by simple serial interface access.This clock/calendar can provide second, point, time, day, the moon, year information; The described RAM circuit that extends out adopts IS61LV25616AL chip, and is connected to CH376 chip, SD card interface and USB interface.This chip A0-A17 is totally 18 road signal inputs, I/O0-I/O15 totally 16 signals exports, its 18 road input signal is from 2#DSP chip, and by the choosing of its sheet of 2#DSP chip controls, read-write, for expanding the data-carrier store of described 2#DSP chip, by CH376 chip by the reading and writing data deposited to SD card or USB(as USB flash disk) in, realize mass data storage function, thus provide powerful essence data files for its supporting diagnosis of energy saving and energy auditing system software; The described FLASH circuit that extends out adopts SST39VF800 chip, this chip A0-A18 is totally 19 road signal inputs, DQ0-DQ15 totally 16 signals exports, its 19 road signal input is from 2#DSP chip, and by the choosing of its sheet of 2#DSP chip controls, read-write, for expanding the program storage of described 2#DSP chip, realize the massive store of 2#DSP calculation procedure and sampling routine.

Extending out FLASH is a kind of involatile internal memory, and under the condition not having electric current supply, also can keep data muchly, storage characteristics is equivalent to hard disk.Extending out FLASH utilizes SST39VF800 chip to realize expanded function, is mainly used in storing DSP application program.Extending out RAM utilizes IS61LV25616AL chip to realize expanded function, intactly can deposit the data of dsp chip process and monitoring record, read for host computer software section, make the data between 2#DSP and described DSP peripheral expansion module, data read-write module, human-computer interaction module transmit more simple and efficient.

Described data read-write module comprises: reading and writing data circuit, SD card interface circuit and USB flash disk interface circuit.Wherein, reading and writing data circuit is connected on described 2#DSP kernel processor chip, and SD card interface circuit and USB flash disk interface circuit are connected to reading and writing data circuit;

Described reading and writing data circuit adopts CH376 file management chip to be connected with described 2#DSP chip TMS 320 F 2812, realizes selecting the sheet of CH376 chip, Read-write Catrol, carries out control read and write in outside removable memory the data from 2#DSP chip; CH376 file management chip is connected with described USB flash disk interface circuit, and itself D-and D+ port controlling USB flash disk is read and write; CH376 file management chip is connected with described SD card interface circuit, and its SD_CS, SD_D0, SD_CK, SD_DI port controlling SD card is read and write; Described SD card interface circuit for accessing SD card, to store monitoring record data and DSP computing data; Described USB flash disk interface circuit is for accessing USB flash disk, and function is with SD card.

Reading and writing data circuit adopts CH376 file management chip, and this chip D0-D7 is totally eight road signal inputs, from 2#DSP.The choosing of this chip slapper and read-write control by 2#DSP, ensure to read and write data in real time in removable memory, facilitate backstage upper computer analyzing software to the use of data, save detection time, improve efficiency.

Described human-computer interaction module comprises: level shifting circuit, display module, input through keyboard circuit.Wherein, level shifting circuit input interface is connected to described 1#DSP and 2#DSP chip, and its output interface is connected to Liquid Crystal Module; Input through keyboard circuit is connected to level shifting circuit input interface, controls display module; Display module is connected to level shifting circuit.The digital signal that will show is exported by level shifting circuit, and shown by Liquid Crystal Module, these digital signals shown comprise various to analyzing the useful electric data of user's energy consumption condition, comprise three-phase voltage, three-phase current, three phase power, power factor etc.;

Described level shifting circuit adopts 74ALVC16245 chip, latches and buffered the digital signal from A/D sampling A/D chip and dsp chip, ensures that Liquid Crystal Module can show the electric parameters parameter situation of current user to be measured in real time; Described display module adopts LCD12864 display module, and this modular belt Chinese word library, display resolution is high, can form complete Chinese man-machine interaction graphical interfaces.The electric parameters parameter situation of the current subscriber's line to be measured of its display, facilitates tester to observe operation; Described input through keyboard circuit adopts button trigger circuit, the I/O message of DSP data analysis chip number is utilized to control the operation of display screen, this input through keyboard circuit is connected to the input port of level shifting circuit, for controlling liquid crystal display manually, preserving simultaneously and arranging detecting instrument parameter.

Described peripheral interface module comprises: DC+5V interface, SD card interface, USB interface and RS232 interface.Be mainly and the invention provides various interface function.Wherein, SD card interface, for inserting SD card, stores data; USB interface inserts the removable memories such as USB flash disk; RS232 Interface realization data communication function; DC+5V interface, for the invention provides ﹢ 5V direct supply, ensures that instrument normally works.

Described removable memory comprises: Large Copacity SD card or USB flash disk.Make the present invention at least can store the Monitoring Data amount of a week, these Real-time Monitoring Datas are that host computer energy conservation potential online automatic detection and power quality harnessed synthetically simulation software provide powerful basic data support.

Comprehensive diagnos and assessment should be made based on the individual line subscriber energy-saving potential of double T MS320F2812 and quality of power supply intelligent diagnosing instrument to special line energy-saving potential and the quality of power supply, provide decision information for user carries out maximization production energy-saving.The present invention is based on up-to-date two CSTR framework, high-precision A/D Sampling techniques, massive store technology and friendly human-computer interaction technology, and adopt the measurement means of science, ensure the automatic monitoring record of the accurate real-time online of user's energy data to be measured; This invention simultaneously has telecommunications functions, can serve more high-rise business information analysis and management system.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.

Claims

1. individual line subscriber energy-saving potential and a quality of power supply intelligent diagnosing instrument, is characterized in that, comprises removable memory and the data acquisition unit be connected successively, data analysis unit, DSP peripheral functional modules; Removable memory is connected to described data analysis unit; Data acquisition unit is connected to individual line subscriber circuit to be measured;

2. a kind of individual line subscriber energy-saving potential according to claim 1 and quality of power supply intelligent diagnosing instrument, is characterized in that described data acquisition unit comprises sensing module, Signal-regulated kinase and A/D sampling module;

3. a kind of individual line subscriber energy-saving potential according to claim 1 and quality of power supply intelligent diagnosing instrument, is characterized in that the 1#DSP data analysis chip in described data analysis unit and 2#DSP data analysis chip employing TMS320F2812 chip;

4. a kind of individual line subscriber energy-saving potential according to claim 1 and quality of power supply intelligent diagnosing instrument, is characterized in that described DSP peripheral functional modules comprises peripheral interface module, DSP peripheral expansion module, data read-write module and human-computer interaction module;

5. a kind of individual line subscriber energy-saving potential according to claim 1 and quality of power supply intelligent diagnosing instrument, is characterized in that between described 1#TMS320F2812 chip and 2#TMS320F2812 chip by the high-speed serial communication between high-speed serial communication Interface realization DSP and external unit or another DSP.

6. a kind of individual line subscriber energy-saving potential according to claim 1 and quality of power supply intelligent diagnosing instrument, it is characterized in that utilizing IS61LV25616AL chip and SST39VF800 chip to expand RAM and FLASH of described 1# and 2#DSP respectively, make DSP can perform Large Copacity program, store Large Volume Data.

7. a kind of individual line subscriber energy-saving potential according to claim 1 and quality of power supply intelligent diagnosing instrument, it is characterized in that removable memory adopts Large Copacity SD card or USB flash disk, utilize file management control chip CH376 read and write the monitoring record data volume at least one week and be stored in SD card or USB flash disk.