CN102721887A - Three-phase electrical parameter gathering device and method for analyzing and processing three-phase electrical signals - Google Patents
Three-phase electrical parameter gathering device and method for analyzing and processing three-phase electrical signals Download PDFInfo
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- CN102721887A CN102721887A CN2012102222591A CN201210222259A CN102721887A CN 102721887 A CN102721887 A CN 102721887A CN 2012102222591 A CN2012102222591 A CN 2012102222591A CN 201210222259 A CN201210222259 A CN 201210222259A CN 102721887 A CN102721887 A CN 102721887A
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Abstract
The invention discloses a three-phase electrical parameter gathering device which comprises a signal gathering unit, a signal conditioning circuit, an analog-to-digital conversion module, a main control unit, a storage unit and a communication unit, wherein the signal gathering unit, the signal conditioning circuit and the analog-to-digital conversion module are sequentially connected, and the main control unit is respectively connected with the analog-to-digital module, the storage unit and the communication unit. The invention further discloses a method for analyzing and processing three-phase electrical signals. The method includes the following steps: initializing a system; processing sampling data, and calculating three-phase electrical parameters; uploading three-phase electrical parameter data; and storing data. The three-phase electrical parameter gathering device adopts an analog-to-digital (A/D) conversion chip and a microprocessor, can perform complex data processing, completes more electrical parameter measuring, is high in measuring accuracy, small in size and easy and convenient to set.
Description
Technical field
The present invention relates to a kind of data collector and data processing method, specifically a kind of three phase electrical parameters harvester reaches the three-phase electricity signal analysis and processing method.
Background technology
Three-phase multifunctional electrical energy meter designs to the power monitoring demand of electric system, industrial and mining enterprises, communal facility, intelligent building, the parameters of electric power commonly used that its energy measurement is all, and like three-phase current, voltage, meritorious, reactive power, electric degree, harmonic wave etc.
Along with the develop rapidly of electronic technology, the integrated level of electric energy meter is increasingly high.Present three-phase multifunctional ammeter mainly is to adopt electric energy computation chip to add microcontroller architecture, and all electrical quantitys of this scheme all are to be analyzed voluntarily by electric energy computation chip, though reduced the requirement to the microcontroller deal with data; But the electrical quantity kind of calculating depends on the function of electric energy computation chip fully, often can not comprehensively analyze electrical quantity; More do not possess the frequency analysis function; Receive A/D figure place and A/D sampling and the restriction of switching time simultaneously, measuring accuracy is not high, uses dumb.
Summary of the invention
To above-mentioned deficiency; The invention provides a kind of three phase electrical parameters harvester reaches the three-phase electricity signal analysis and processing method; It can directly calculate various electrical quantitys according to the signal of gathering, and the electrical quantity kind of not only calculating is abundant, and possesses the frequency analysis function.
In order to solve the technical matters of above-mentioned existence; The present invention adopts following technical proposals: a kind of three phase electrical parameters harvester; It is characterized in that; Comprise signal gathering unit, signal conditioning circuit, analog-to-digital conversion module, main control unit, storage unit and communication unit, said signal gathering unit, signal conditioning circuit and analog-to-digital conversion module are connected successively, and said main control unit is connected with analog-to-digital conversion module, storage unit and communication unit respectively; Wherein, Signal gathering unit is in order to the signal of gathering three-phase electricity and send to signal conditioning circuit; Said signal conditioning circuit is tentatively nursed one's health processing to the three-phase electricity signal of gathering, and the three-phase electricity signal that will tentatively nurse one's health after the processing sends to D/A converter module, and said D/A converter module is digital signal with the analog signal conversion of the three-phase electricity that collects and the digital signal of three-phase electricity sent to main control unit; Said main control unit carries out analyzing and processing to the three-phase electricity signal that receives; Calculate various electrical quantitys, and the three phase electrical parameters after the analyzing and processing is sent to host computer through communication unit, simultaneously data storage is arrived storage unit.
In the above-mentioned three phase electrical parameters harvester, said signal gathering unit comprises the voltage transformer (VT) summation current transformer.
In the above-mentioned three phase electrical parameters harvester, said main control unit comprises microcontroller and is attached thereto SPI interface, RS485 interface and IIC interface respectively.
In the above-mentioned three phase electrical parameters harvester, said storage unit comprises eeprom memory.
In the above-mentioned three phase electrical parameters harvester, said analog-to-digital conversion module comprises 16 6 passage synchronized sampling modulus conversion chips.
A kind of the three-phase electricity signal is carried out the method for analyzing and processing, it is characterized in that, comprise following process:
System initialization;
Sampled data is handled, calculated three phase electrical parameters;
Upload the three phase electrical parameters data;
Data storage.
In the above-mentioned method of three-phase electricity being carried out analyzing and processing, also comprise the sampling interrupt procedure, said sampling interrupt procedure comprises following process: judge whether to arrive a sampling period, if, then calculate three phase electrical parameters, finish the sampling interrupt procedure then; If not, then directly finish the sampling interrupt procedure.
In the above-mentioned method of three-phase electricity being carried out analyzing and processing, also comprise the communication disruption process, said communication disruption process comprises following process: interrupt instruction whether, if do not have, then finish the communication disruption process; If interrupt instruction is arranged, then carry out associative operation according to instruction, if parameter instruction is set, then module parameter is provided with, if reading of data is instructed, then return the three phase electrical parameters of collection.
In the above-mentioned method of three-phase electricity being carried out analyzing and processing; Also comprise regularly interrupt procedure; Said timing interrupt procedure comprises following process: whether carry out timing and interrupt, if then cumulative data is added up; And store up-to-date cumulative data into storage unit, stop timing interrupt procedure then; If deny, then direct stop timing interrupt procedure.
In the above-mentioned method of three-phase electricity being carried out analyzing and processing, said data handling procedure comprises following process:
Gather three-phase voltage, the current instantaneous value in a plurality of cycles;
Calculate three-phase phase voltage, line voltage, three-phase phase voltage mean value, three-phase line voltage mean value through the digital integration formula; Three-phase imbalance voltage, imbalance of three-phase voltage degree, three-phase electricity flow valuve; The three-phase imbalance electric current, three current imbalance degree, cycle; Power factor (PF), three phases active power, electrical quantitys such as three phase reactive power and three-phase applied power;
Time Calculation through performance number and accumulation goes out the meritorious total electric energy of forward, oppositely meritorious total electric energy, forward is idle total electric energy, reverse idle total electric energy;
Voltage, current instantaneous value are done Fourier transform, time-domain signal is transformed into frequency-domain analysis three-phase voltage each harmonic and resultant distortion rate, three-phase current each harmonic and resultant distortion rate etc.
The invention has the beneficial effects as follows that the present invention has adopted the A/D conversion chip to add microprocessor, microprocessor can directly calculate various electrical quantitys according to the signal of gathering, and the electrical quantity kind of not only calculating is abundant, and possesses the frequency analysis function.The present invention can carry out complicated data processing, not only accomplishes more electric parameter measurement, and measuring accuracy is high, and device volume little, be provided with easy.
Description of drawings
Fig. 1 is a theory diagram of the present invention;
Fig. 2 is the electrical schematic diagram of microcontroller according to the invention;
Fig. 3 is the electrical schematic diagram of signal gathering unit according to the invention, signal conditioning circuit and D/A converter module;
Fig. 4 is the electrical schematic diagram of storage unit according to the invention;
Fig. 5 is first electrical schematic diagram of communication unit according to the invention;
Fig. 6 is a method flow diagram of the present invention;
Fig. 7 is the process flow diagram of sampling interrupt procedure according to the invention;
Fig. 8 is the process flow diagram of communication disruption process according to the invention;
Fig. 9 is the process flow diagram of timing interrupt procedure according to the invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
To shown in Figure 5, a kind of three phase electrical parameters harvester of the present invention comprises signal gathering unit, signal conditioning circuit, analog-to-digital conversion module, main control unit, storage unit and communication unit like Fig. 1.Said main control unit comprises microcontroller and is attached thereto SPI interface, RS485 interface and IIC interface respectively; Said signal gathering unit, signal conditioning circuit and analog-to-digital conversion module are connected successively; Said microcontroller is connected with analog-to-digital conversion module, is connected with storage unit, is connected with communication unit through the RS485 interface through the IIC interface through the SPI interface respectively, and said storage unit comprises eeprom memory; Wherein, Signal gathering unit is in order to the signal of gathering three-phase electricity and send to signal conditioning circuit; Said signal conditioning circuit is tentatively nursed one's health processing to the three-phase electricity signal of gathering; And the three-phase electricity signal that will tentatively nurse one's health after the processing sends to D/A converter module, and said D/A converter module is digital signal with the analog signal conversion of the three-phase electricity that collects and the digital signal of three-phase electricity sent to microcontroller that said microcontroller carries out analyzing and processing to the three-phase electricity signal that receives; And the three phase electrical parameters after the analyzing and processing sent to host computer through communication unit, simultaneously with data storage to eeprom memory.
Fig. 2 is the electrical schematic diagram of microcontroller according to the invention.32 ARM chip STM32F103 as shown in Figure 2, that said microcontroller U3 adopts, fast operation, cost performance is high, and abundant Peripheral Interface commonly used is provided.
Fig. 3 is the electrical schematic diagram of signal gathering unit according to the invention, signal conditioning circuit and D/A converter module.As shown in Figure 3; Said signal gathering unit comprises the voltage transformer (VT) summation current transformer; The signal that T1, T3, T5 current transformer and T2, T4, T6 voltage transformer (VT) produce sends to D/A converter module after nursing one's health through signal conditioning circuit, and D/A converter module is digital signal and sends to microcontroller the analog signal conversion of the three-phase electricity that collects.Wherein D/A converter module U4 is a slice high speed analog-to-digital conversion chip CS5451, this chip is integrated 6 delta-sigma A/D converters, wave filter and one and the joining serial line interfaces of microcontroller, and resolution is 16, for high precision computation provides guarantee.
Fig. 4 is the electrical schematic diagram of storage unit according to the invention.As shown in Figure 4, said storage unit is outside power down data storage cell, mainly is made up of a slice EEPROM, and the protected data of system's operation is preserved in real time, accomplishes the accumulation function of some accumulation parameters.
Fig. 5 is the electrical schematic diagram of communication unit that the present invention tells.As shown in Figure 5, communication unit is 485 telecommunication circuit parts, and this part mainly is made up of a slice SP485 chip, and R22, R23, D4, D5 form 485 interface anti-surge protection circuits jointly, improves the reliability of circuit.
Fig. 6 is a method flow diagram of the present invention.As shown in Figure 6, a kind of the three-phase electricity signal is carried out the method for analyzing and processing, may further comprise the steps:
The work beginning.
System initialization: microcontroller initialization peripheral circuit, read the protected data among the EEPROM, recover the power down data, initialization cumulative data etc.
Data processing: sampled data is handled, and calculated three phase electrical parameters.
Upload data: regularly, upload the three phase electrical parameters data perhaps according to the instruction of host computer.
Data storage: the Data Update that regularly will accumulate is in outside power down data storage cell.
Sampling is interrupted: the interrupt event of sampling is handled.
Communication disruption: carry out the break-make interrupt event and handle.
Regularly interrupt: the interrupt event of sampling is handled.
Return the output treatment step, carry out cycling.
Fig. 7 is the process flow diagram of sampling interrupt procedure according to the invention.As shown in Figure 7, said sampling interrupt procedure comprises following process: judge whether to arrive a sampling period, if, then calculate three phase electrical parameters, finish the sampling interrupt procedure then; If not, then directly finish the sampling interrupt procedure.
Fig. 8 is the process flow diagram of communication disruption process according to the invention.As shown in Figure 8, said communication disruption process comprises following process: interrupt instruction whether, if do not have, then finish the communication disruption process; If interrupt instruction is arranged, then carry out associative operation according to instruction, if parameter instruction is set, then module parameter is provided with, if reading of data is instructed, then return the three phase electrical parameters of collection.
Fig. 9 is the process flow diagram of timing interrupt procedure according to the invention.As shown in Figure 9, said timing interrupt procedure comprises following process: whether carry out timing and interrupt, if then cumulative data is added up, and store up-to-date cumulative data into storage unit, then the stop timing interrupt procedure; If deny, then direct stop timing interrupt procedure.
Data handling procedure according to the invention comprises following process: three-phase voltage, the current instantaneous value of gathering a plurality of cycles;
Calculate three-phase phase voltage, line voltage, three-phase phase voltage mean value, three-phase line voltage mean value through the digital integration formula; Three-phase imbalance voltage, imbalance of three-phase voltage degree, three-phase electricity flow valuve; The three-phase imbalance electric current, three current imbalance degree, cycle; Power factor (PF), three phases active power, electrical quantitys such as three phase reactive power and three-phase applied power; Time Calculation through performance number and accumulation goes out the meritorious total electric energy of forward, oppositely meritorious total electric energy, forward is idle total electric energy, reverse idle total electric energy; Voltage, current instantaneous value are done Fourier transform, time-domain signal is transformed into frequency-domain analysis three-phase voltage each harmonic and resultant distortion rate, three-phase current each harmonic and resultant distortion rate.
The present invention measures parameters calculated and has related to three-phase phase voltage, line voltage, three-phase phase voltage mean value, three-phase line voltage mean value, three-phase imbalance voltage; The imbalance of three-phase voltage degree, three-phase electricity flow valuve, three-phase imbalance electric current, three current imbalance degree; Cycle, power factor (PF), three phases active power, three phase reactive power; Three-phase applied power, forward total electric energy of gaining merit, oppositely meritorious total electric energy, forward is idle total electric energy; Reverse idle total electric energy, three-phase voltage each harmonic and resultant distortion rate, three-phase current each harmonic and resultant distortion rate etc.Therefore, it is abundant that the present invention measures calculating parameter, can reach high-acruracy survey and calculate, and not only is provided with easyly, with low cost, and satisfied various application occasions.
Claims (10)
1. three phase electrical parameters harvester; It is characterized in that; Comprise signal gathering unit, signal conditioning circuit, analog-to-digital conversion module, main control unit, storage unit and communication unit; Said signal gathering unit, signal conditioning circuit and analog-to-digital conversion module are connected successively, and said main control unit is connected with analog-to-digital conversion module, storage unit and communication unit respectively; Wherein, Signal gathering unit is in order to the signal of gathering three-phase electricity and send to signal conditioning circuit; Said signal conditioning circuit is tentatively nursed one's health processing to the three-phase electricity signal of gathering, and the three-phase electricity signal that will tentatively nurse one's health after the processing sends to D/A converter module, and said D/A converter module is digital signal with the analog signal conversion of the three-phase electricity that collects and the digital signal of three-phase electricity sent to main control unit; Said main control unit carries out analyzing and processing to the three-phase electricity signal that receives; Calculate various electrical quantitys, and the three phase electrical parameters after the analyzing and processing is sent to host computer through communication unit, simultaneously data storage is arrived storage unit.
2. a kind of three phase electrical parameters harvester according to claim 1 is characterized in that said signal gathering unit comprises the voltage transformer (VT) summation current transformer.
3. a kind of three phase electrical parameters harvester according to claim 1 is characterized in that, said main control unit comprises microcontroller and is attached thereto SPI interface, RS485 interface and IIC interface respectively.
4. a kind of three phase electrical parameters harvester according to claim 1 is characterized in that said storage unit comprises eeprom memory.
5. a kind of three phase electrical parameters harvester according to claim 1 is characterized in that, said analog-to-digital conversion module comprises 16 6 passage synchronized sampling modulus conversion chips.
6. according to claim 1ly a kind of the three-phase electricity signal is carried out the method for analyzing and processing, it is characterized in that, comprise following process:
System initialization;
Sampled data is handled, calculated three phase electrical parameters;
Upload the three phase electrical parameters data;
Data storage.
7. a kind of method of the three-phase electricity signal being carried out analyzing and processing according to claim 6; It is characterized in that; Also comprise the sampling interrupt procedure, said sampling interrupt procedure comprises following process: judge whether to arrive a sampling period, if; Then calculate three phase electrical parameters, finish the sampling interrupt procedure then; If not, then directly finish the sampling interrupt procedure.
8. according to claim 6ly a kind of the three-phase electricity signal is carried out the method for analyzing and processing, it is characterized in that also comprise the communication disruption process, said communication disruption process comprises following process: interrupt instruction whether, if do not have, then finish the communication disruption process; If interrupt instruction is arranged, then carry out associative operation according to instruction, if parameter instruction is set, then module parameter is provided with, if reading of data is instructed, then return the three phase electrical parameters of collection.
9. a kind of method of the three-phase electricity signal being carried out analyzing and processing according to claim 6; It is characterized in that also comprise regularly interrupt procedure, said timing interrupt procedure comprises following process: whether carry out timing and interrupt; If; Then cumulative data is added up, and store up-to-date cumulative data into storage unit, then the stop timing interrupt procedure; If deny, then direct stop timing interrupt procedure.
10. according to claim 6ly a kind of the three-phase electricity signal is carried out the method for analyzing and processing, it is characterized in that said data handling procedure comprises following process:
Gather three-phase voltage, the current instantaneous value in a plurality of cycles;
Calculate three-phase phase voltage, line voltage, three-phase phase voltage mean value, three-phase line voltage mean value through the digital integration formula; Three-phase imbalance voltage, imbalance of three-phase voltage degree, three-phase electricity flow valuve; The three-phase imbalance electric current, three current imbalance degree, cycle; Power factor (PF), three phases active power, electrical quantitys such as three phase reactive power and three-phase applied power;
Time Calculation through performance number and accumulation goes out the meritorious total electric energy of forward, oppositely meritorious total electric energy, forward is idle total electric energy, reverse idle total electric energy;
Voltage, current instantaneous value are done Fourier transform, time-domain signal is transformed into frequency-domain analysis three-phase voltage each harmonic and resultant distortion rate, three-phase current each harmonic and resultant distortion rate.
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Cited By (5)
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| CN104076197A (en) * | 2014-07-14 | 2014-10-01 | 国家电网公司 | Unbalanced current testing device and method for capacitor bank |
| CN104833846A (en) * | 2015-05-21 | 2015-08-12 | 江阴众和电力仪表有限公司 | Optical fiber current sensor intelligent electric meter |
| CN106018942A (en) * | 2016-06-28 | 2016-10-12 | 清华大学 | Current sensor array used for measuring three-phase current and measuring method thereof |
| CN109507629A (en) * | 2018-11-15 | 2019-03-22 | 青岛艾诺智能仪器有限公司 | A kind of three phase electrical parameters test device |
| CN109669420A (en) * | 2018-12-25 | 2019-04-23 | 永橡胶有限公司 | A kind of tyre capsule vulcanizer energy consumption statistic system based on configuration platform |
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Application publication date: 20121010 |