CN101187811A - Generator excitation controller communication system based on DSP and its working method - Google Patents
Generator excitation controller communication system based on DSP and its working method Download PDFInfo
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- CN101187811A CN101187811A CNA200710150392XA CN200710150392A CN101187811A CN 101187811 A CN101187811 A CN 101187811A CN A200710150392X A CNA200710150392X A CN A200710150392XA CN 200710150392 A CN200710150392 A CN 200710150392A CN 101187811 A CN101187811 A CN 101187811A
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Abstract
A communication system and a work method of an excitation controller of a generator on the basis of DSP, which is characterized in that the system is constituted by a signal pickup circuit, a PC workbench which is used for an upper computer, a generator excitation controller which is used for a lower computer, an Ethernet control chip, a level shift and logic circuit, a spacing chip and a level shift chip. The work method of the invention comprises steps: first, gathering data, second, handling and storing the data, third, conversing a protocol, and fourth, analyzing and handling the data. The invention has the advantages that the invention can achieve the excitation control rules of various complex generators, the communication interface of the Ethernet of the lower computer and the high rate and flexible data communication of the upper computer, moreover, system vibration, system frequency abrupt change, the change of electric current and electric voltage, and real-time current-voltage curve of a system dynamic procedure, which are caused by various disconnection faults, can be continuously recorded without missing by an analyzing software of the upper computer.
Description
(1) technical field:
The invention belongs to the motor automatic field, particularly a kind of method that realizes based on generator excitation controller communication system and the Ethernet protocol thereof of DSP.
(2) technical background:
Motor robotization control is the key areas of Automation of Electric Systems, and well behaved excitation controlling device not only can guarantee the reliability and stability of generator operation, and the operation conditions of whole electric system is had material impact.Along with improving constantly of the GPA level of IT application, require that excitation controller is stable, reliability service the time, the multidimensional information space of abundanter man-machine interface He " man-machine harmony " can be provided; The trend of new network The Application of Technology and control integration requires excitation controller can be connected to new communication network---on the Ethernet.The application of network technology has brought completely new concept for the control field, make each controller of system no longer work in the isolated environment, but exchange message mutually, thereby the uniform dispatching and the arrangement of the system of realization, even can carry out remote remote control.This helps improving unit efficiency, reduces operations staff's workload, to adapt to not caller station realization few man on duty, unwatched development trend.
(3) summary of the invention:
The object of the present invention is to provide a kind of method that realizes based on generator excitation controller communication system and the Ethernet protocol thereof of DSP, it makes full use of the abundant characteristics of peripheral hardware on high performance DSP precision height, fast operation and the sheet, by ethernet communication flexibly, various data are required to be transferred to host computer according to difference, and host computer is by monitoring and the analytic function of application software realization to the generator operation situation.
Technical scheme of the present invention: a kind of generator excitation controller communication system based on DSP is characterized in that it is by signal acquisition circuit, constitutes as the PC workbench of host computer, generator excitation controller, ethernet control chip, level conversion and logical circuit, isolating chip and level transferring chip as slave computer; The output terminal of said signal acquisition circuit connects the signals of underlying computer input end, the DSP internal bus of slave computer is connected ethernet control chip by level transferring chip, level conversion with logical circuit, ethernet control chip is connected with the respective pins of isolating chip, and isolating chip links with the respective pins of host computer RJ-45 interface.
Above-mentioned said signal acquisition circuit is made up of voltage, current transformer and AC sampling front-end circuit; The generator secondary side connects voltage, current transformer, is the voltage signal of 0～3V with high voltage, big current conversion, and voltage, current transformer connect the AC sampling front-end circuit, and the AC sampling front-end circuit connects 16 A/D ALT-CH alternate channels of DSP.
Above-mentioned said host computer is to be equipped with the PC workbench that application software is supported Ethernet interface communication, and the host computer application program receives or send data to slave computer, and the data that slave computer is sended over show in the mode of text or figure.
Above-mentioned said slave computer is to be the excitation controller of core with DSP, and excitation controller is put into designated storage area by signal acquisition circuit and internal digital signal handler with the significant data of computing gained, is used for the exchanges data with host computer.
Above-mentioned said ethernet control chip links to each other with slave computer by parallel data line, and link to each other with host computer with telecommunication cable by Ethernet interface, realize the conversion chip of the ethernet format transmission of data between host computer and the slave computer, slave computer is by data line, and address strobe line and other boost lines link to each other with ethernet control chip.
A kind of method of work of the generator excitation controller communication system based on DSP is characterized in that it comprises following job step:
(1) data acquisition: analog to digital conversion circuit is realized the collection of data on front-end circuit and the sheet;
(2) data processing and storage: dsp chip realizes that operation of data is handled and storage;
(3) protocol conversion: the slave computer end is realized protocol conversion by ethernet control chip;
(4) data analysis is handled: host computer is realized the analyzing and processing of data that slave computer is sended over by application program.
Its front-end circuit utilizes mutual inductor with the high voltage of generator secondary side, big current conversion voltage signal among a small circle in the above-mentioned said step (1), and by further ratio discharge circuit, the small-signal of analog-to-digital conversion module on the suitable sheet that amplitude limiter circuit, filtering circuit will obtain obtains the digital quantity signal of various electric current and voltages then by analog to digital conversion circuit on the sheet.
Dsp chip obtains various data with the digital quantity that analog to digital conversion obtains by the AC sampling algorithm in the above-mentioned said step (2), when finishing control law and being used to control output, deposit data in specified memory, as used with the host computer data communication.
Utilize ethernet control chip as the intermediate protocol conversion equipment in the above-mentioned said step (3), cooperate slave computer to realize the Ethernet host-host protocol; Slave computer is by interrupt routine, and the data that slave computer is delivered to the control chip buffer zone are packaged as automatically that the Frame that meets Ethernet protocol is sent to host computer or the frame that the host computer transmission comes resolved and obtain the actual data of wanting and be sent to slave computer; The step that said Ethernet protocol is realized is as follows:
A. the data in the packet are read in buffer zone;
Whether whether whether, be IP bag, whether the IP address is correct if b. with initialization of variable, judging whether the bag into ARP then, be the ICMP bag, be the TCP bag, all is to negate more than the adding, dashes the parsing of finishing agreement most.
C. if the ARP bag judges that then whether the ARP group mode is correct, finishes protocol analysis;
D. if ICMP wraps, processing IC MP agreement is finished protocol analysis;
E. if the TCP bag is handled Transmission Control Protocol, finish protocol analysis.
The application program of above-mentioned said step (4) is to receive or send data to slave computer, and the data that slave computer is sended over show in the mode of text or figure.
Principle of work of the present invention: signal acquisition circuit is generator voltage mutual inductor secondary side voltage and Current Transformer Secondary survey current transformation than the low amplitude value alternating voltage, to become that digital quantity signal sends into DSP be in the central data processor of core to analog to digital conversion on multidiameter option switch and sheet, central processing unit calculates the silicon controlled trigger angle to input quantity by selected control law on the one hand, significant data to gained in the computation process deposits specific memory section on the one hand, make things convenient for the ethernet communication system to carry out access, ethernet control chip is by the access of interrupt request realization to specific memory section, realize protocol conversion simultaneously, finish and the communicating by letter of host computer, host computer is realized the storage of data by application software, show and analyzing and processing.
Superiority of the present invention is: 1, can utilize high performance control chip DSP to realize the generator excitation control law of various complexity; 2, can realize the ethernet interface of slave computer by novel ethernet control chip, and host computer combines with excitation controller by Ethernet interface, realizes data communication flexibly at a high speed; 3, can realize the system oscillation that causes because of various open circuit faults in the continuous recording generator exhaustively, the electric current and the change in voltage of system frequency sudden change and system dynamic course by upper computer analyzing software; 4, can directly draw the reliability report of existing duty by the real-time voltage-current curve of analysis software; 5, by various excitation tests and simulated failure test observation electrical power system transient operation conditions, the superiority of more various control theories compares, for parameters optimization provides reference.
(4) description of drawings:
Accompanying drawing 1 is the one-piece construction block diagram of the related a kind of generator excitation controller communication system based on DSP of the present invention.
Accompanying drawing 2 is the protocol processes process flow diagram of the related a kind of generator excitation controller communication system based on DSP of the present invention.
Accompanying drawing 3 enters the encapsulation process figure of protocol stack for the data of the related a kind of generator excitation controller communication system based on DSP of the present invention.
Accompanying drawing 4 is collected front end circuit structure figure for the voltage and current signal of the related a kind of generator excitation controller communication system based on DSP of the present invention.
(5) embodiment:
Embodiment: a kind of generator excitation controller communication system (see figure 1) based on DSP is characterized in that it is by signal acquisition circuit, constitutes as the PC workbench of host computer, generator excitation controller, level conversion and logical circuit, isolating chip, ethernet control chip and level transferring chip as slave computer; The output terminal of said signal acquisition circuit connects the signals of underlying computer input end, the internal bus of the DSP of slave computer is connected ethernet control chip RTL8019AS by level transferring chip 74LVTH16425, level conversion with logical circuit, the TPIN+ of ethernet control chip RTL8019AS, TPIN-, TPOUT+, TPOUT-connect TPIN+, TPIN-, TPOUT+, the TPOUT-of isolating chip 20F001N, and the TPTX+ of isolating chip 20F001N, TPTX-, TPRX+, TPRX-connect TPTX+, TPTX-, TPRX+, the TPRX-of host computer RJ-45 interface.
Native system is a central processing unit with the high-performance Electric Machine Control special DSP chip TMS320 F2812 of the up-to-date release of Texas Instruments, signals collecting leading portion circuit and A/D change-over circuit; The significant data that while DSP will calculate gained is placed on designated storage area, realizes Ethernet host-host protocol (seeing Fig. 2,3) by ethernet interface chip RTL8019AS, and upper computer end is by storage, demonstration and the analyzing and processing of application program realization to data.
The utilization of above-mentioned said signals collecting front-end circuit (see figure 4) is the voltage signal of 0～3V from the high voltage of the generator secondary side of mutual inductor conversion, big current conversion; as Fig. 5; and utilize D11, D12, D21, D22 to constitute the input saturation protection; R24, R252, R26, R34, R35, R36, C11, C12, C16, C17 constitute the mutual inductor rc filter circuit, and the signal of gained is directly sent into 16 A/D ALT-CH alternate channels of DSP after photoelectricity is isolated.
Above-mentioned said digital signal that goes up A/D conversion gained deposits appointed buffer in, CPU carries out calculation process by the effective value of fast fourier transform calculating voltage electric current and with reference value, realize complicated control algolithm, draw next step trigger angle at last, output control controllable silicon power circuit.
Writing of above-mentioned said host computer application program: application program utilizes VC++ that Microsoft provides and MFC frame clsss function to realize various demonstrations to data: comprise real-time curve display voltage current data, active power and reactive power cyclic curve; Realize the system oscillation that causes because of various open circuit faults in the continuous recording generator exhaustively, the electric current and the change in voltage of system frequency sudden change and system dynamic course; Can directly draw the reliability report of existing duty by the real-time voltage-current curve of analysis software.
Claims (10)
1. generator excitation controller communication system based on DSP is characterized in that it is by signal acquisition circuit, constitutes as the PC workbench of host computer, generator excitation controller, ethernet control chip, level conversion and logical circuit, isolating chip and level transferring chip as slave computer; The output terminal of said signal acquisition circuit connects the signals of underlying computer input end, the DSP internal bus of slave computer is connected ethernet control chip by level transferring chip, level conversion with logical circuit, ethernet control chip is connected with the respective pins of isolating chip, and isolating chip links with the respective pins of host computer RJ-45 interface.
2. according to the said a kind of generator excitation controller communication system of claim 1, it is characterized in that said signal acquisition circuit is made up of voltage, current transformer and AC sampling front-end circuit based on DSP; The generator secondary side connects voltage, current transformer, is the voltage signal of 0～3V with high voltage, big current conversion, and voltage, current transformer connect the AC sampling front-end circuit, and the AC sampling front-end circuit connects 16 A/D ALT-CH alternate channels of DSP.
3. according to the said a kind of generator excitation controller communication system of claim 1 based on DSP, it is characterized in that said host computer is to be equipped with the PC workbench that application software is supported Ethernet interface communication, the host computer application program receives or sends data to slave computer, and the data that slave computer is sended over show in the mode of text or figure.
4. according to the said a kind of generator excitation controller communication system of claim 1 based on DSP, it is characterized in that said slave computer is is the excitation controller of core with DSP, excitation controller is put into designated storage area by signal acquisition circuit and internal digital signal handler with the significant data of computing gained, is used for the exchanges data with host computer.
5. according to the said a kind of generator excitation controller communication system of claim 1 based on DSP, it is characterized in that said ethernet control chip links to each other with slave computer by parallel data line, and link to each other with host computer with telecommunication cable by Ethernet interface, realize the conversion chip of the ethernet format transmission of data between host computer and the slave computer, slave computer is by data line, and address strobe line and other boost lines link to each other with ethernet control chip.
6. method of work by the said generator excitation controller communication system based on DSP of claim 1 is characterized in that it comprises following job step:
(1) data acquisition: analog to digital conversion circuit is realized the collection of data on front-end circuit and the sheet;
(2) data processing and storage: dsp chip realizes that operation of data is handled and storage;
(3) protocol conversion: the slave computer end is realized protocol conversion by ethernet control chip;
(4) data analysis is handled: host computer is realized the analyzing and processing of data that slave computer is sended over by application program.
7. according to the method for work of the said a kind of generator excitation controller communication system based on DSP of claim 6, it is characterized in that its front-end circuit utilizes mutual inductor with the high voltage of generator secondary side, big current conversion voltage signal among a small circle in the said step (1), and by further ratio discharge circuit, the small-signal of analog-to-digital conversion module on the suitable sheet that amplitude limiter circuit, filtering circuit will obtain obtains the digital quantity signal of various electric current and voltages then by analog to digital conversion circuit on the sheet.
8. according to the method for work of the said a kind of generator excitation controller communication system based on DSP of claim 6, it is characterized in that dsp chip obtains various data with the digital quantity that analog to digital conversion obtains by the AC sampling algorithm in the said step (2), when finishing control law and being used to control output, deposit data in specified memory, as used with the host computer data communication.
9. according to the method for work of the said a kind of generator excitation controller communication system based on DSP of claim 6, it is characterized in that utilizing ethernet control chip as the intermediate protocol conversion equipment in the said step (3), cooperate slave computer to realize the Ethernet host-host protocol; Slave computer is by interrupt routine, and the data that slave computer is delivered to the control chip buffer zone are packaged as automatically that the Frame that meets Ethernet protocol is sent to host computer or the frame that the host computer transmission comes resolved and obtain the actual data of wanting and be sent to slave computer; The step that said Ethernet protocol is realized is as follows:
A. the data in the packet are read in buffer zone;
Whether whether whether, be IP bag, whether the IP address is correct if b. with initialization of variable, judging whether the bag into ARP then, be the ICMP bag, be the TCP bag, all is to negate more than the adding, dashes the parsing of finishing agreement most.
C. if the ARP bag judges that then whether the ARP group mode is correct, finishes protocol analysis;
D. if ICMP wraps, processing IC MP agreement is finished protocol analysis;
E. if the TCP bag is handled Transmission Control Protocol, finish protocol analysis.
10. according to the method for work of the said a kind of generator excitation controller communication system based on DSP of claim 6, it is characterized in that application program in the said step (4) is to receive or send data to slave computer, and the data that slave computer is sended over show in the mode of text or figure.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA200710150392XA CN101187811A (en) | 2007-11-26 | 2007-11-26 | Generator excitation controller communication system based on DSP and its working method |
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| CNA200710150392XA CN101187811A (en) | 2007-11-26 | 2007-11-26 | Generator excitation controller communication system based on DSP and its working method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101795108A (en) * | 2010-03-16 | 2010-08-04 | 东方电气集团东方电机有限公司 | Excitation control system for giant machine set |
| CN101866170A (en) * | 2010-04-27 | 2010-10-20 | 四川中鼎科技有限公司 | Optimized operation system of power plant |
| CN103604983A (en) * | 2013-11-23 | 2014-02-26 | 大连尚能科技发展有限公司 | System for controlling operation parameters of wind power current transformer based on DSP and ARM |
| CN104503330A (en) * | 2014-12-19 | 2015-04-08 | 上海发电设备成套设计研究院 | Power generator excitation system data collecting instrument based on ARM (advanced RISC machine) |
| CN106199427A (en) * | 2016-07-06 | 2016-12-07 | 中国东方电气集团有限公司 | A kind of record wave system system of excitation in real time |
| CN106707851A (en) * | 2016-12-06 | 2017-05-24 | 上海纳信实业有限公司 | Excitation control system data recorder based on dual-core DSP |
| CN108051744A (en) * | 2018-01-05 | 2018-05-18 | 贵州电网有限责任公司电力调度控制中心 | A kind of excitation harvester for generator on-line monitoring system |
| CN108169676A (en) * | 2018-01-05 | 2018-06-15 | 贵州电网有限责任公司电力调度控制中心 | A kind of generator on the spot online acquisition device and monitoring system |
-
2007
- 2007-11-26 CN CNA200710150392XA patent/CN101187811A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101795108A (en) * | 2010-03-16 | 2010-08-04 | 东方电气集团东方电机有限公司 | Excitation control system for giant machine set |
| CN101795108B (en) * | 2010-03-16 | 2012-05-02 | 东方电气集团东方电机有限公司 | Excitation control system for giant machine set |
| CN101866170A (en) * | 2010-04-27 | 2010-10-20 | 四川中鼎科技有限公司 | Optimized operation system of power plant |
| CN103604983A (en) * | 2013-11-23 | 2014-02-26 | 大连尚能科技发展有限公司 | System for controlling operation parameters of wind power current transformer based on DSP and ARM |
| CN104503330A (en) * | 2014-12-19 | 2015-04-08 | 上海发电设备成套设计研究院 | Power generator excitation system data collecting instrument based on ARM (advanced RISC machine) |
| CN106199427A (en) * | 2016-07-06 | 2016-12-07 | 中国东方电气集团有限公司 | A kind of record wave system system of excitation in real time |
| CN106199427B (en) * | 2016-07-06 | 2019-08-23 | 中国东方电气集团有限公司 | A kind of real-time excitation recording system |
| CN106707851A (en) * | 2016-12-06 | 2017-05-24 | 上海纳信实业有限公司 | Excitation control system data recorder based on dual-core DSP |
| CN108051744A (en) * | 2018-01-05 | 2018-05-18 | 贵州电网有限责任公司电力调度控制中心 | A kind of excitation harvester for generator on-line monitoring system |
| CN108169676A (en) * | 2018-01-05 | 2018-06-15 | 贵州电网有限责任公司电力调度控制中心 | A kind of generator on the spot online acquisition device and monitoring system |
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