CN2870304Y - Data collection and processing apparatus based on DSP - Google Patents
Data collection and processing apparatus based on DSP Download PDFInfo
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- CN2870304Y CN2870304Y CN 200520123926 CN200520123926U CN2870304Y CN 2870304 Y CN2870304 Y CN 2870304Y CN 200520123926 CN200520123926 CN 200520123926 CN 200520123926 U CN200520123926 U CN 200520123926U CN 2870304 Y CN2870304 Y CN 2870304Y
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Abstract
The utility model relates to a data collecting and processing device of a digital exciting controller based on DSP. The apparatus comprises a frequency measuring circuit, a preprocessing circuit, interface circuits of ADC and DSP, an AC data collecting circuit, a switching value collecting circuit, phase-shifting pulse formation and power output circuits. The utility model has the following superiorities: DSP chip designed for electromechanical and kinetic control is applied and hardware design for excitation controller is simplified; AD sampling unit is applied in data collection, combination of DSP chip and its peripheral hardware circuits leaves out power parameter transducer required in excitation controller, and as a result, expenses on hardware are cut short and the workload of system maintenance is reduced; the speed and accuracy of data collection device and as well as real-time performance of the exciting controller are improved thanks to high-speed data processing capacity of DSP.
Description
(1) technical field:
The utility model belongs to electric power system synchronous generator exciting controller data acquisition technique field, in particular for the data acquisition and the processing unit based on the digital excitation controller of DSP of precision that improves data acquisition and processing and speed.
(2) background technology:
Field regulator is the important component part of synchronous generator system, is playing an important role aspect normal operation of maintenance generator and the power system stability operation.The present the following aspects of its main acting body: (1) control generator terminal voltage is at given level; (2) distribution of control reactive power; (3) improve the stability of synchronous generator parallel running, improve the service conditions of electric power system; (4) restriction, defencive function are provided and improve the sensitivity of relaying protection to generator.Along with the increase day by day of generator single-machine capacity and scale of power, generating set has proposed more and more higher requirement to excitation regulation device at aspects such as rapidity, reliability, pliabilities.
At present domestic also have a large amount of analog excitation controllers using, the digital excitation controller of releasing, the overwhelming majority is to be primary processor with 8,16 or 32 single-chip microcomputers, constitute the excitation controller of single channel, binary channels or multi-channel structure, the selection of its hardware configuration form has single-chip microcomputer, single board computer, industrial computer and programmable controller structure.For improving the performance and the operational factor index of exciter control system; to satisfy the needs of power system stability operation; in excitation controlling device, add protection and limitation function on the one hand; on the other hand; many new excitation control theories and algorithm thereof along with the development and application of control theory in excitation controller, as Non-Linear Control Theory, artificial neural net, fuzzy control etc.This trend has proposed to compare higher requirement to the data acquisition system of excitation controller and the central processing unit that is adopted thereof.In excitation controller, the task that central processing unit is finished comprises information gathering, data passes, data processing, system's control, online detection, failure wave-recording and communication etc., under the situation that the operational data amount rolls up, the conventional one-piece machine is in the requirement of not satisfying system aspect arithmetic speed, real-time and the precision.At present, no matter be analog field regulator or be the digital excitation controller of core that its data acquisition and disposal ability do not satisfy the needs of excitation controller development with the single-chip microcomputer.Research is the data acquisition of core and the important research content that processing unit is synchronous generator excited system with the New DSP processor.
(3) summary of the invention:
The purpose of this utility model is to provide a kind of data acquisition and processing unit of the digital excitation controller based on DSP, it is applied in high performance DSP in the excitation controller, researched and developed is the data acquisition and processing (DAP) system of core processor with DSP, the optimization of Digital Signal Processing being made of DSP realizes the degree of depth digitlization of excitation controller, improve the precision and the speed of excitation controller image data, thereby improved the performance and the control index of whole excitation controller.
The technical solution of the utility model: a kind of data acquisition and processing unit of the digital excitation controller based on DSP, it is characterized in that it is by frequency measurement circuit, pre-process circuit, the interface circuit of ADC and DSP, exchange data acquisition circuit, the switch acquisition circuit, phase-shift pulse forms and power output circuit is formed, being loaded with switching value is connected with the input of pre-process circuit with the output of the front-end circuit of the data-signal of analog quantity, the output of pre-process circuit with exchange the input of data acquisition circuit and be connected with the switch acquisition circuit, exchanging data acquisition circuit is connected with the input of the interface circuit of DSP with the output of switch acquisition circuit, the data of data processing circuit form circuit by phase-shift pulse and output to pulse transformer, and the output signal of pulse transformer is input to the thyristor in the power output circuit.
Above-mentioned said frequency measurement circuit is made of the task manager of voltage transformer, voltage comparator, optical coupling isolator, DC power supply, digital signal processor and relevant matches components and parts, frequency measurement circuit becomes square wave with the set end voltage signal through the voltage comparator shaping, the task manager of incoming digital signal processor after the light-coupled isolation is finished the measurement of frequency by task manager.
Above-mentioned said pre-process circuit comprises the pre-process circuit of switching value and analog quantity, the switching value pre-process circuit adopts conventional photoelectric isolating circuit, the analog quantity input signal comprises two kinds of baseband signals of voltage and current of synchronous generator exciting controller, is formed in input A/D module and need carries out pretreated signal conditioning circuit before; Its first order amplifier is for improving the voltage follower of input impedance with the reinforcing band load capacity, and the second level is for carrying out the second-order low-pass filter circuit of Filtering Processing to input signal; Resistor network in the third level is adjusted voltage to 0-5V, constitutes the difference input mode that requires with the input of satisfying analog to digital converter.
The interface circuit of above-mentioned said analog to digital converter and DSP, exchange data acquisition circuit, the switch acquisition circuit is made of analog to digital converter, operational amplifier, digital signal processor and relevant interface device, pretreated analog signal input analog-to-digital converter, switching value and the digital quantity input dsp chip after the analog to digital converter conversion, handle by the AC sampling algorithm that software is designed, draw relevant Control Parameter, realize the control law of excitation controller.
Above-mentioned said phase-shift pulse forms and power output circuit is to form circuit, pulse transformer and power output circuit by control impuls to be constituted, phase-shift pulse formation circuit is delayed time by counter among the DSP and is realized, obtain the phase shift trigger angle, pulse transformer carries out power amplification with the pulse signal that obtains, signal after the pulse transformer amplifies outputs to the thyristor in the power output circuit, with the break-make of control respective thyristor and the switching of switch, thus the size of control exciting current.
Operation principle of the present utility model is: the voltage of synchronous generator exciting controller, current signal are taken from generator machine end PT, CT respectively, PT is output as 0-100V, CT is output as the AC signal of 0-5A, with high-accuracy voltage instrument transformer summation current transformer the voltage and current of excitation system is carried out transformation of scale, it is being fit within the scope of handling.By pre-process circuit signal to be collected is carried out preliminary treatment again, acquired signal is transformed within the ADC input range, interference signal is carried out Filtering Processing.This part circuit has material impact for the precision that guarantees data acquisition.Analog quantity can be imported the ADC chip through after the preliminary treatment.Switching value is directly imported dsp chip after photoelectricity is isolated.Realize excitation controller voltage and current real-time signal acquisition and processing by external hardware device and software programming.In the AC sampling process, make full use of resource in the sheet of DSP, weekly phase 40 points of sampling.When converting at every turn, will produce ADC and convert interruption, the data to the A/D sampling in interrupt service routine read, handle.Voltage, the electric current that collects calculated, draw effective value, active power and the reactive power of set end voltage, machine end electric current, exciting voltage, exciting current and line voltage.Phase-shift pulse formation is delayed time by counter and is realized.Excitation controller obtains the phase shift trigger angle according to the resulting set end voltage of AC sampling and reactive power and various protection limit calculation, utilizes resource on the sheet of DSP, realizes phase-shift pulse.The task of phase shift trigger module is to produce the adjustable pulse of phase place, amplifies through the pulse transformer, is used for triggering the thyristor in the rectifier bridge, and its pilot angle is changed with the size of control voltage, thereby reaches the purpose of automatic regulator generator exciting current.
Superiority of the present utility model is with technique effect: 1. this device combines with relevant DSP peripheral hardware circuit, has simplified the excitation controlling device hardware designs; 2. used the dsp chip at motor and motion control field, integrated multiple advanced person's peripheral hardware is simplified the design of hardware circuit on the chip, has improved the real-time of system reliability and response; 3. in data acquisition, adopt the AC sampling unit, save the electric parameters transducer in the excitation controller,, simplified hardware spending, reduced the workload of system maintenance the responding ability of excitation system is improved; 4. utilize DSP data computation and data-handling capacity at a high speed, improved the speed and the precision of this data acquisition system, improved the real-time of excitation controller.
(4) description of drawings:
Accompanying drawing 1 is the data acquisition of the related digital excitation controller based on DSP of the utility model and the general structure schematic diagram of processing unit.
Accompanying drawing 2 is the circuit structure diagram of the data preprocessing part of the data acquisition of the related digital excitation controller based on DSP of the utility model and processing unit.
Accompanying drawing 3 is the data acquisition of the related digital excitation controller based on DSP of the utility model and the frequency measurement circuit structural representation in the processing unit.
Accompanying drawing 4 be ADC and DSP in data acquisition and the processing unit of the related digital excitation controller based on DSP of the utility model interface circuit, exchange data acquisition circuit, switch acquisition electrical block diagram.
The data acquisition and the phase-shift pulse in the processing unit of the related digital excitation controller based on DSP of accompanying drawing 5 the utility model form and the power output circuit structural representation.
(5) embodiment:
Embodiment: a kind of data acquisition and processing unit of the digital excitation controller based on DSP, it is characterized in that it is by frequency measurement circuit, pre-process circuit, the interface circuit of analog to digital converter ADS8364 and DSP TMS320F2812, exchange data acquisition circuit, the switch acquisition circuit, phase-shift pulse forms and power output circuit is formed, being loaded with switching value is connected with the input of pre-process circuit with the output of the front-end circuit of the data-signal of analog quantity, the output of pre-process circuit with exchange the input of data acquisition circuit and be connected with the switch acquisition circuit, exchange data acquisition circuit and be connected with the input of the interface circuit of DSPTMS320F2812 with the output of switch acquisition circuit, the data of data processing circuit form by phase-shift pulse and power output circuit output.
Above-mentioned said frequency measurement circuit is made of the task manager of voltage transformer, voltage comparator, optical coupling isolator, DC power supply, digital signal processor TMS320F2812 and relevant matches components and parts, frequency measurement circuit becomes square wave with the set end voltage signal through the voltage comparator shaping, the task manager of incoming digital signal processor TMS320F2812 is finished the measurement of frequency after the light-coupled isolation by task manager.
Above-mentioned said pre-process circuit comprises the pre-process circuit of switching value and analog quantity, the switching value pre-process circuit adopts conventional photoelectric isolating circuit, the analog quantity input signal comprises two kinds of baseband signals of voltage and current of synchronous generator exciting controller, before input A/D modules A DS8364, need carry out preliminary treatment, constitute the modulate circuit of signal.Its first order amplifier is a voltage follower, improves input impedance, with the reinforcing band load capacity; The second level is that the second-order low-pass filter circuit carries out Filtering Processing to input signal; Resistor network R16, R17 in the third level, R18, R19 adjust to 0-5V with voltage, constitute the difference input mode, to satisfy the input requirement of analog to digital converter ADS8364.
The interface circuit of above-mentioned said analog to digital converter ADS8364 and DSPF2812, exchange data acquisition circuit, the switch acquisition circuit is by analog to digital converter ADS8364, digital signal processor TMS320F2812, operational amplifier and relevant peripheral interface device constitute, pretreated analog signal input analog-to-digital converter ADS8364, switching value and the digital quantity input DSP TMS320F2812 chip after the analog to digital converter conversion, handle by the AC sampling algorithm that software is designed, draw relevant Control Parameter, realize the control law of excitation controller.
Above-mentioned said phase-shift pulse forms and power output circuit is to form circuit, pulse transformer and power output circuit by control impuls to be constituted, phase-shift pulse formation circuit is delayed time by counter among the DSPTMS320F2812 and is realized, obtain the phase shift trigger angle, pulse transformer carries out power amplification with the pulse signal that obtains, signal after the pulse transformer amplifies outputs to the thyristor in the power output circuit, with the break-make of control respective thyristor and the switching of switch, thus the size of control exciting current.
Claims (5)
1, a kind of data acquisition and processing unit of the digital excitation controller based on DSP, it is characterized in that it is by frequency measurement circuit, pre-process circuit, the interface circuit of ADC and DSP, exchange data acquisition circuit, the switch acquisition circuit, phase-shift pulse forms and power output circuit is formed, being loaded with switching value is connected with the input of pre-process circuit with the output of the front-end circuit of the data-signal of analog quantity, the output of pre-process circuit with exchange the input of data acquisition circuit and be connected with the switch acquisition circuit, exchanging data acquisition circuit is connected with the input of the interface circuit of DSP with the output of switch acquisition circuit, the data of data processing circuit form circuit by phase-shift pulse and output to pulse transformer, and the output signal of pulse transformer is input to the thyristor in the power output circuit.
2, according to the data acquisition and the processing unit of the said a kind of digital excitation controller based on DSP of claim 1, it is characterized in that said frequency measurement circuit is that task manager and relevant matches components and parts by voltage transformer, voltage comparator, optical coupling isolator, DC power supply, digital signal processor are constituted, frequency measurement circuit becomes square wave with the set end voltage signal through the voltage comparator shaping, the task manager of incoming digital signal processor after the light-coupled isolation is finished the measurement of frequency by task manager.
3, according to the data acquisition and the processing unit of the said a kind of digital excitation controller based on DSP of claim 1, it is characterized in that said pre-process circuit comprises the pre-process circuit of switching value and analog quantity, the switching value pre-process circuit adopts conventional photoelectric isolating circuit, the analog quantity input signal comprises two kinds of baseband signals of voltage and current of synchronous generator exciting controller, is formed in input A/D module and need carries out pretreated signal conditioning circuit before; Its first order amplifier is for improving the voltage follower of input impedance with the reinforcing band load capacity, and the second level is for carrying out the second-order low-pass filter circuit of Filtering Processing to input signal; Resistor network in the third level is adjusted voltage to 0-5V, constitutes the difference input mode that requires with the input of satisfying analog to digital converter.
4, data acquisition and processing unit according to the said a kind of digital excitation controller based on DSP of claim 1, the interface circuit that it is characterized in that said analog to digital converter and DSP, exchange data acquisition circuit, the switch acquisition circuit is by analog to digital converter, operational amplifier, digital signal processor and relevant interface device constitute, pretreated analog signal input analog-to-digital converter, switching value and the digital quantity input dsp chip after the analog to digital converter conversion, handle by the AC sampling algorithm that software is designed, draw relevant Control Parameter, realize the control law of excitation controller.
5, data acquisition and processing unit according to the said a kind of digital excitation controller based on DSP of claim 1, it is characterized in that said phase-shift pulse forms and power output circuit is to form circuit by control impuls, pulse transformer and power output circuit constitute, phase-shift pulse formation circuit is delayed time by counter among the DSP and is realized, obtain the phase shift trigger angle, pulse transformer carries out power amplification with the pulse signal that obtains, signal after the pulse transformer amplifies outputs to the thyristor in the power output circuit, with the break-make of control respective thyristor and the switching of switch, thus the size of control exciting current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520123926 CN2870304Y (en) | 2005-12-12 | 2005-12-12 | Data collection and processing apparatus based on DSP |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200520123926 CN2870304Y (en) | 2005-12-12 | 2005-12-12 | Data collection and processing apparatus based on DSP |
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| CN2870304Y true CN2870304Y (en) | 2007-02-14 |
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| CN 200520123926 Expired - Lifetime CN2870304Y (en) | 2005-12-12 | 2005-12-12 | Data collection and processing apparatus based on DSP |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100384081C (en) * | 2005-12-12 | 2008-04-23 | 天津理工大学 | DSP-based digital excitation controller data acquisition and processing system |
| CN104460412A (en) * | 2014-10-27 | 2015-03-25 | 四川蓝讯宝迩电子科技有限公司 | Data collecting template used for power monitoring system |
-
2005
- 2005-12-12 CN CN 200520123926 patent/CN2870304Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100384081C (en) * | 2005-12-12 | 2008-04-23 | 天津理工大学 | DSP-based digital excitation controller data acquisition and processing system |
| CN104460412A (en) * | 2014-10-27 | 2015-03-25 | 四川蓝讯宝迩电子科技有限公司 | Data collecting template used for power monitoring system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080423 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |