CN105676041A - Double CPU electric energy quality monitoring device based on DSP and ARM - Google Patents
Double CPU electric energy quality monitoring device based on DSP and ARM Download PDFInfo
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- CN105676041A CN105676041A CN201610175018.4A CN201610175018A CN105676041A CN 105676041 A CN105676041 A CN 105676041A CN 201610175018 A CN201610175018 A CN 201610175018A CN 105676041 A CN105676041 A CN 105676041A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
Abstract
The invention provides a double CPU electric energy quality monitoring device based on a DSP and an ARM, comprising a parameter collection module and a data processing module. The parameter collection module comprises a voltage current transformation circuit, a zero-cross detection circuit, a phase-locked loop circuit, a low-pass filtering circuit and an A/D converting circuit. The data processing module comprises a DSP engineering module and an ARM engineering module. The parameter collection module is mainly responsible for collecting the voltage current signal of a power grid in real time, and sending the collected signal to a DSP through the A/D converting circuit. The DSP engineering module is responsible for calculating a plurality of electric energy quality parameters after receiving the data, and then transmitting the calculated electric energy quality data to the ARM engineering module through a double port ARM. The double CPU electric energy quality monitoring device guarantees real-time monitoring, and meanwhile possesses a higher sampling rate and an accurate and high-speed data transmission function; in addition, the double CPU electric energy quality monitoring device possesses greater functional modules, and can realize external data storage, wireless communication, touch screen control and alarm.
Description
Technical field
The present invention relates to the Monitoring techniques of the quality of power supply in power system, particularly relate to the equipment for monitoring power quality of a kind of dual processors being made up of DSP and ARM.
Background technology
Along with the high speed development of power industry, stationary power quality index as: voltage fluctuation, frequency jitter, harmonic wave etc., caused the attention that relevant departments are enough. What meanwhile transient power quality problem also became is more and more outstanding, such as the frequent generation of the phenomenons such as the rapid liter of the falling of voltage, voltage, short supply interruption, all brings no small loss to user. Traditional monitoring method is the Monitoring techniques based on virtual value theory, but due to time window too long, the virtual value only measuring electrical network voltage cannot accurately describe power quality problem, therefore must develop the Monitoring techniques meeting following requirements as early as possible:
(1) for the randomness of signal disturbance, it is necessary to can ensure to be carried out by power network signal the real-time monitoring of whole process;
(2) upper strata processing unit should have powerful hardware resource, it is possible to while carrying out data processing, completes the functions such as real-time clock, external data storage, liquid-crystal display, data communication. With regard to requiring, selected arm processor has abundant peripheral hardware interface for this;
(3) data sampling section six passages can be carried out synchronously, high-speed sampling, and need relatively high sampling rate, the information of higher harmonic can be measured;
(4) synchronism of different monitoring points image data can be realized, it is convenient to random perturbation and failure message be carried out the analysis of off-line;
Between (5) two treaters the transmission mode of data not only will high speed on the guarantee time, more to be ensured the accuracy of transfer;
(6) ensure real-time communication and the information sharing of data between two treaters, and the wireless network communication of surveyed data can be realized.
Summary of the invention
It is an object of the invention to for deficiency of the prior art, it is proposed that based on the equipment for monitoring power quality of the dual-cpu structure of DSP and ARM. This device, while ensureing whole process Real-Time Monitoring, has higher sampling rate and accurate data-transformation facility at a high speed, and has powerful function module, it is possible to realize external data storage, cableless communication, touch-screen control and warning function.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: based on the dual processors equipment for monitoring power quality of DSP and ARM, it is characterised in that, comprise parameter sampling module and data processing module; Described parameter sampling module comprises: the data set module of voltage and current signal and the A/D of acquired signal change module, it is characterized in that, voltage and electric current signal are gathered by the collection module of data, then by the ADS8365 modulus conversion chip that extends out, the six road signals that voltage and current parameters acquisition module export are sampled, then with and the mode of port communications by data bus by sample to data be sent in DSP processing module and process accordingly; Described data processing module comprises: DSP engineering module and ARM engineering module, it is characterized in that, data after A/D analog to digital conversion are carried out storing and carry out the calculating of multiple power quality parameter by DSP engineering module in charge, then by the every power quality parameter after calculating, the mode communicated by dual port RAM is sent to ARM engineering module and carries out the storage of data, display and communication.
Further, the data acquisition module of described voltage and current signal, it is by the voltage of alternating current obtained through PT, CT (rated value 100V) or alternating current (rated value is 5A), access in the conversion circuit being made up of precision current type voltage transformer SPT204A and precision current mutual inductor SCT254FK respectively, to obtain applicable A/D chip voltage value.
Further, the A/D of described sampled signal changes module, have employed the analog to digital converter ADS8365 of 16, it is achieved that to the parallel transmission of three-phase voltage, tri-phase current 6 tunnel sampled signal.
Further, that described ARM process chip adopts is the microcontroller STM32F103RBT6 taking Cortex-M3 type ARM as core.
Further, the communication between described DSP and ARM, employing be the transmission that the IDT7026 dual port RAM chip of 16Kxl6bit carries out data.
Further, described ARM engineering module comprises cableless communication module, touch screen module, USB module and alarm module, wherein when the generation quality of power supply exceeds standard situation, alarm module can sound the alarm and remind staff to process in time, the frequency of alarm sound and the quality of power supply amplitude that exceeds standard is closely related, and alarm sound is more rapid more at most for the value that is above standard.
Compared with prior art, the invention has the beneficial effects as follows:
(1) by zero passage detection and phaselocked loop circuit realiration to the whole process Real-Time Monitoring of the quality of power supply;
(2) have employed the analog to digital converter ADS8365 of 16, it is achieved that to the parallel transmission of three-phase voltage, tri-phase current 6 tunnel sampled signal;
(3) communication between DSP and ARM, employing be the transmission that the IDT7026 dual port RAM chip of 16Kxl6bit carries out data, this chip can realize the high-speed transfer of data;
(4) peripheral functionality enriched by ARM, it is achieved that external data storage, cableless communication, touch-screen control and warning function.
Accompanying drawing explanation
Fig. 1 is the structure block diagram of the present invention based on the dual processors equipment for monitoring power quality of DSP and ARM.
Fig. 2 is the interface circuit of ADS8365 and TMS320F28335 of the present invention.
Fig. 3 is the dual port RAM junction circuit between DSP and ARM of the present invention.
Fig. 4 is 1.9V power supply circuit of the present invention.
Fig. 5 is 3.3V power supply circuit of the present invention.
Fig. 6 is the main program flow chart of DSP subsystem software of the present invention.
Fig. 7 is Data Analysis Services schema of the present invention.
Fig. 8 is ARM system master routine design flow diagram of the present invention.
Specific embodiments
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described in further detail.
As shown in Figure 1, the present invention is based on the dual processors equipment for monitoring power quality of DSP and ARM, comprise parameter collection module (1) and data processing module (2), first this monitoring device carries out parameter acquisition by voltage current transformating circuit (3), then utilize low-pass filtering circuit (8) that the signal gathered is carried out filtering, simultaneously by the synchronized sampling of phaselocked loop circuit (5) control signal, then change circuit (9) by the A/D that extends out to be sampled by filtered signal, and with parallel port mode by data bus by sample to data be sent in data processing module (2) and process accordingly. described data processing module (2) comprising: DSP engineering module (6) and ARM engineering module (7), DSP processing module (6) is responsible for being undertaken storing by the data after analog to digital conversion and is carried out the calculating of multiple power quality parameter, then by the every power quality data after calculating, it is transferred to ARM man-machine interaction management module (7) by dual port RAM (10) and realizes cableless communication (11), touch-screen control (12), warning (13) and external data storage (14) function.
1. hardware components.
The main effect of parameter collection module (1) is the weak electric signal that the forceful electric power signal of grid side is transformed to applicable A/D modulus conversion chip by conversion circuit, and realizes the real-time synchronized sampling to power network signal simultaneously. This module changes circuit composition (9) primarily of electric current and voltage collector (3), zero passage detection circuit (4), phaselocked loop circuit (5), low-pass filtering circuit (8) and A/D.
The effect of electric current and voltage collector (3) is by the voltage of alternating current obtained through PT, CT (rated value 100V) or alternating current (rated value is 5A), access respectively in the conversion circuit being made up of precision current type voltage transformer (SPT204A) and precision current mutual inductor (SCT254FK), obtained less output voltage.
The effect of low-pass filtering circuit (8) carries out filtering process to adopting it before sampled signal enters A/D conversion chip, owing to this electric energy quality monitor can realize the measurement of harmonic wave within 50 times, so this device adopts the harmonic wave of two rank Butterworth LPF filtering more than 50 times, to prevent the frequency spectrum of sampled signal is mixed folded.
Zero passage detection circuit (4) is the circuit taking voltage comparator MAX474 as core. When input signal is from, when just turning into negative and zero passage, the output of circuit is high level; And when the input signal in circuit be from negative turn into positive zero passage time, circuit then exports as lower level, by this circuit to realize the square wave signal that the positive string signal of electrical network is converted into same-phase. The eCAP module that square wave signal is introduced DSP can measure the frequency of electrical network, this square wave signal is quoted from phase-locking frequency multiplication circuit simultaneously, in order to realize the triggering to phase-locking frequency multiplication circuit.
Input signal can be carried out frequency multiplication control by phaselocked loop circuit (5), owing to the frequency of input signal is exactly the base wave frequency of system itself, so in order to realize 256 points of sampling in one-period, input signal will be carried out 256 frequencys multiplication. Phaselocked loop can make the phase differential that output signal and input signal keep constant within the specific limits, so that the output signal of system can follow the tracks of frequency input signal. What this device adopted is the phase-locking frequency multiplication circuit that integrated digital phaselocked loop CD4046 and counter CD4040 is formed jointly.The time cmos circuit technique that single-chip integration digital phase-locked loop CD4046 adopts, is characterized in the voltage range width of power supply, and input resistance height, and dynamically power consumption is little. When the voltage of power supply is 15V, its most high frequency can reach 1.2MHz, thus in being usually used in, low-frequency range.
In the high speed acquisition and treatment system of data, owing to image data amount is big and the increase of Processing tasks amount, thus for the requirement of data transmission also become very high. If the interface not having high-speed transferring data between system and system, easily result in blockage when so transmitting larger data amount between system phenomenon, finally can have influence on whole system data processing and communication ability. When dsp processor responds the interrupt request of A/D chip within the cycle in this equipment for monitoring power quality, it is necessary to process a large amount of data, thus calculate each quality of power supply parameter simultaneously. The final arm processor that also these calculation result is sent to upper strata. Therefore, in order to ensure the speed that data transmit and tolerance range, the communication modes between two treaters, have employed the communication that IDT7026 dual port RAM chip (10) of 16Kxl6bit carries out data. When the treater connecting chip I DT7026 left port needs to use dual port RAM, it first writes 0 to tag latch, then reads the state of tag latch, if the value read is 1, then shows that right output port is using same address unit. Now, left port can carry out cycle check tag latch state, until right output port tag latch position turns into 0, then dual port RAM is carried out access operation; Request can also be cancelled, namely write l to tag latch, then go the operation performing other. In the design of this paper equipment for monitoring power quality, the left port of IDT7026 chip connects TMS320F28335 treater, and right output port then connects STM32F103RBT6 treater. Communicating with dual port RAM between two subsystems, concrete junction circuit is as shown in Figure 2.
Direct supply in this device mainly contains: need in signal conditioning with AD conversion module (9) ± 12V, ± 5V, and 3.3V, 1.9V that data processing module (2) is used. With the use of the main electricity module of HFl0W-TL.B model switch voltage as system, HFl0W-TL-B power supply can provide 220V alternating-current to input, the direct current of ± 12V, ± 5V exports, and has had the direct current of+5V to export the volts DS of TPS75801 and TPS75833 chip acquisition 1.9V and 3.3V that we can utilize TI company to produce respectively. Concrete power source circuit is as shown in Figure 4 and Figure 5.
2. software part.
DSP engineering module (6) groundwork is that the data of sampling are carried out A/D conversion and utilize fft algorithm the numerary signal after conversion to be processed by control A/D conversion chip. DSP receives the signal from phaselocked loop, the startup controlling the conversion of A/D chip is gone as external interrupt, complete to ensure the A/D conversion of the sampling data when DSP reads register data, it is necessary to allow A/D conversion chip produce an interruption at the end of a sampling period and go startup DSP to read the data in result register simultaneously. Adopting six road voltages and electric current signal synchronously to carry out A/D conversion herein, so DSP to be circulated, the A/D read in No. six registers changes result. After data sink completes, by entering, data processor unit utilizes fft algorithm the data received to be processed to DSP, obtain the parameter of the various quality of power supply, last as requested by the two mouth ARM of result write that calculates so that the reading of ARM chip and subsequent disposal, as shown in Figure 6, this part mainly comprises three modules to DSP subsystem software main program flow chart: dsp system initialize module, the read module of sampling data and the processing module of data.
First data processor checks whether correctly collect enough data points, due to DSP and do not know that the data collected are the data belonging to which cycle, and also cannot judge which is voltage signal, which is electric current signal. Therefore, for the ease of the analyzing and processing of data, we just set A0, B0, C0 before sampling is voltage channel, and A1, B1, C1 are current channel, one group of data of often sampling, and setting counter adds 1, judges with this which group is data gathered belong to. And then put into corresponding address according to sequence, so that follow-up analyzing and processing. The idiographic flow of Data Analysis Services is as shown in Figure 7.
The main task of ARM engineering module (7) is the data processed by dual port RAM (10) communications reception DSP engineering module (6), then by the corresponding module of ARM, the work such as touch-screen control (12), the usb communication (14) of data, the response of button is carried out. And when start these operations and should be controlled by touch-screen and button. After system electrification, first carrying out the initial configuration of each peripheral functionality module of system, such as clock configuration, I/O mouth configures, baud rate configuration etc.; Then system enters While (1) cycling program, start wait-receiving mode man-machine interface sending controling instruction, starting after receiving instruction to complete corresponding function according to the classes of instructions set in advance, function here has following several: the program online updating etc. of the display of data, data and the storage of picture, the transmission over radio of data and main control unit. Program circuit designs as shown in Figure 8. Receive the data frame sent from touch interface when host interface after, from data frame, parse the instruction numbering of button, then jump to subprograms corresponding according to corresponding instruction and start to execute the task. If in the control key command of the key command received not included in design, system resets again, then continue wait-receiving mode control data frame.
Claims (6)
1. based on the dual processors equipment for monitoring power quality of DSP and ARM, it is characterised in that, comprise parameter sampling module and data processing module; Described parameter sampling module comprises: the data set module of voltage and current signal and the A/D of acquired signal change module, it is characterized in that, voltage and electric current signal are gathered by the collection module of data, then by the ADS8365 modulus conversion chip that extends out, the six road signals that voltage and current parameters acquisition module export are sampled, then with and the mode of port communications by data bus by sample to data be sent in DSP processing module and process accordingly; Described data processing module comprises: DSP engineering module and ARM engineering module, it is characterized in that, data after A/D analog to digital conversion are carried out storing and carry out the calculating of multiple power quality parameter by DSP engineering module in charge, then by the every power quality parameter after calculating, the mode communicated by dual port RAM is sent to ARM engineering module and carries out the storage of data, display and communication.
2. according to the dual processors equipment for monitoring power quality based on DSP and ARM described in claim 1, it is characterized in that, the data acquisition module of described voltage and current signal, it is by the voltage of alternating current obtained through PT, CT (rated value 100V) or alternating current (rated value is 5A), access in the conversion circuit being made up of precision current type voltage transformer SPT204A and precision current mutual inductor SCT254FK respectively, to obtain applicable A/D chip voltage value.
3. according to the dual processors equipment for monitoring power quality based on DSP and ARM described in claim 1, it is characterized in that, the A/D of described sampled signal changes module, have employed the analog to digital converter ADS8365 of 16, it is achieved that to the parallel transmission of three-phase voltage, tri-phase current 6 tunnel sampled signal.
4. according to the dual processors equipment for monitoring power quality based on DSP and ARM described in claim 1, it is characterised in that, that described ARM process chip adopts is the microcontroller STM32F103RBT6 taking Cortex-M3 type ARM as core.
5. according to the dual processors equipment for monitoring power quality based on DSP and ARM described in claim 1, it is characterised in that, the communication between described DSP and ARM, employing be the transmission that the IDT7026 dual port RAM chip of 16Kxl6bit carries out data.
6. according to the dual processors equipment for monitoring power quality based on DSP and ARM described in claim 1, it is characterized in that, described ARM engineering module comprises cableless communication module, touch screen module, USB module and alarm module, wherein when the generation quality of power supply exceeds standard situation, alarm module can sound the alarm and remind staff to process in time, the frequency of alarm sound and the quality of power supply amplitude that exceeds standard is closely related, and alarm sound is more rapid more at most for the value that is above standard.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219432A (en) * | 2017-07-26 | 2017-09-29 | 武汉理工大学 | Watercraft electric propulsion system power quality detection method and detection means |
| CN107247199A (en) * | 2017-05-27 | 2017-10-13 | 上海电机学院 | A kind of remote power quality detecting system based on ARM |
| CN107942168A (en) * | 2017-11-24 | 2018-04-20 | 南京易司拓电力科技股份有限公司 | A kind of replaceable digital and analog equipment for monitoring power quality and method |
| CN108051664A (en) * | 2017-11-15 | 2018-05-18 | 全球能源互联网研究院有限公司 | A kind of equipment for monitoring power quality |
| CN108072807A (en) * | 2017-11-20 | 2018-05-25 | 安徽晓星能源科技有限公司 | A kind of power quality wireless monitoring device |
| CN108152636A (en) * | 2018-01-09 | 2018-06-12 | 华侨大学 | A kind of Electric Power Quality On-line Monitor System |
| CN108958098A (en) * | 2018-05-11 | 2018-12-07 | 云南电网有限责任公司昆明供电局 | Take into account the controller of the UPQC device of telecommunication |
| CN112506114A (en) * | 2020-12-29 | 2021-03-16 | 河南辉煌科技股份有限公司 | Railway signal external power network monitoring device based on DSP chip |
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| CN201035054Y (en) * | 2007-05-30 | 2008-03-12 | 华南理工大学 | Portable electric energy quality monitoring analyzer based on double CPU mode |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201035054Y (en) * | 2007-05-30 | 2008-03-12 | 华南理工大学 | Portable electric energy quality monitoring analyzer based on double CPU mode |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247199A (en) * | 2017-05-27 | 2017-10-13 | 上海电机学院 | A kind of remote power quality detecting system based on ARM |
| CN107219432A (en) * | 2017-07-26 | 2017-09-29 | 武汉理工大学 | Watercraft electric propulsion system power quality detection method and detection means |
| CN108051664A (en) * | 2017-11-15 | 2018-05-18 | 全球能源互联网研究院有限公司 | A kind of equipment for monitoring power quality |
| CN108072807A (en) * | 2017-11-20 | 2018-05-25 | 安徽晓星能源科技有限公司 | A kind of power quality wireless monitoring device |
| CN107942168A (en) * | 2017-11-24 | 2018-04-20 | 南京易司拓电力科技股份有限公司 | A kind of replaceable digital and analog equipment for monitoring power quality and method |
| CN108152636A (en) * | 2018-01-09 | 2018-06-12 | 华侨大学 | A kind of Electric Power Quality On-line Monitor System |
| CN108958098A (en) * | 2018-05-11 | 2018-12-07 | 云南电网有限责任公司昆明供电局 | Take into account the controller of the UPQC device of telecommunication |
| CN112506114A (en) * | 2020-12-29 | 2021-03-16 | 河南辉煌科技股份有限公司 | Railway signal external power network monitoring device based on DSP chip |
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