CN2854893Y - Capacitor switching monitoring device based on single-chip processor and configuration - Google Patents
Capacitor switching monitoring device based on single-chip processor and configuration Download PDFInfo
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- CN2854893Y CN2854893Y CNU2005201239247U CN200520123924U CN2854893Y CN 2854893 Y CN2854893 Y CN 2854893Y CN U2005201239247 U CNU2005201239247 U CN U2005201239247U CN 200520123924 U CN200520123924 U CN 200520123924U CN 2854893 Y CN2854893 Y CN 2854893Y
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
A capacitor input and elimination control device based on monolithic processor and configuration is composed of industrial control computer (host computer) and monolithic processor (slave computer). The slave computer adopts high-performance monolithic processor as control kernel and high-resolution A/D converter to improve data conversion precision and processing speed, realize rapid automatic classified input and elimination of multiple capacitor groups, satisfy rapid and real-time fundamental harmonic reactive compensation of low-voltage power distribution network, improve power factor, increase output of transformer, reduce power loss, and improve electricity quality. The host computer can provide visual menu, realize online alteration of system parameter according to suggestion of configuration interface, display real-time operation condition of system, and provide exact and reliable reference for analysis and decision.
Description
(1) technical field:
The utility model belongs to power system reactive power compensation control technology field, particularly a kind of capacitor switching supervising device based on single-chip microcomputer and configuration.
(2) background technology:
Reactive power compensation device for capacitor can be according to the reactive power and the line voltage of distribution system internal loading, control thyristor switchable capacitor group, the required reactive power of compensation load, reach and improve power factor, increase transformer and exert oneself, reduce network loss, improve the purpose of the quality of power supply; This kind device generally is made of single-chip microcomputer at present, the certainty of measurement height, and function ratio is more complete, has improved automaticity, but still not ideal enough to online demonstration, monitoring, historical query and the printing function of data; In recent years, along with the function of computer is gradually become strong, various human interface software continued to bring out, and this provides the visual control picture for the operation of capacitor.
(3) summary of the invention:
The purpose of this utility model is to provide a kind of capacitor switching supervising device based on single-chip microcomputer and configuration, monitored picture in conjunction with high performance singlechip chip, close friend, can overcome the deficiency of present control system preferably, be a kind of practicality, close friend's supervisory control system.
The technical solution of the utility model: a kind of capacitor switching supervising device based on single-chip microcomputer and configuration, it is characterized in that it is by being constituted as the configuration system of host computer with as the Single Chip Microcomputer (SCM) system of slave computer, and be connected by serial port with Single Chip Microcomputer (SCM) system as slave computer as the configuration system of host computer; Said configuration system as host computer is to be made of real-time data base and configuration software core; Said Single Chip Microcomputer (SCM) system as slave computer is partly to be made of analog quantity importation, amplification filtering circuit, A/D change-over circuit, microprocessor and storage area, power driving circuit, communication interface; The secondary terminal of said analog quantity importation external impressed current and voltage transformer, the analog quantity output connects the input of amplification filtering circuit, the output of amplification filtering circuit connects the input of A/D change-over circuit, the output of A/D change-over circuit connects the input of microprocessor and storage area, the output of microprocessor and storage area connects power driving circuit, and the output of microprocessor and storage area is connected with host computer by serial communication interface.
Above-mentioned said analog quantity importation is the sampling system of electric current, voltage, the input of this part connects external voltage instrument transformer summation current transformer, its output connects the input of amplification filtering circuit, and sampling system is delivered to control system by voltage, current transformer after with the voltage of system, current signal digitlization; The 220V phase voltage is directly taken in the voltage input of voltage importation, adopt precision resistance dividing potential drop form to obtain the receptible output voltage of A/D, the electric current importation be three-phase current and neutral current behind external current transformer secondary side as the input variable of this part, adopt current transformer to carry out current transformation, secondary adds precision resistance, current information is converted to the receptible voltage of A/D, all installs electromagnetic compatibility and surge absorbing device during circuit design additional to improve antijamming capability.
Above-mentioned said amplification filtering circuit is used for the current and voltage signals of adopting is amplified, be beneficial to and carry out A/D conversion to reach certain amplitude, can constitute differential amplifier by resistance R 1, R2 capacitor C 1, C2, C3, C4, can also adopt the meter specially amplifier.
Above-mentioned said A/D change-over circuit is used for electric current after the amplification filtering and voltage signal are converted to the manageable digital signal of single-chip microcomputer; The transducer input is the signal after amplifier amplifies, and wherein the low noise precision voltage source is used for A/D conversion reference voltage, and its output voltage is an adjustable voltage.
Above-mentioned said microprocessor and storage area are made of CPU, clock chip, Flash memory, RAM, switching value input channel, switching value output channel etc.; Voltage, electric current insert the single-chip microcomputer hsi port after the A/D conversion, CPU by single-chip microcomputer carries out the data computation processing, send trigger impulse by the single-chip microcomputer high speed output, this trigger impulse carries out photoelectricity isolation and triode amplification through power drive pipe circuit, offer the IGBT gate pole input of gate level turn-off thyristor circuit, the conducting of control thyristor is used for switched capacitor; Clock adopts hardware clock, and the data tape of record has markers, and the Flash memory is used for the data of storage of collected, calculating and statistics; The switching value input then is used for monitoring the input state of capacitor, and the switching value output variable is sent into host computer, is handled by the host computer configuration system.
Above-mentioned said communication interface is provided with serial interface chip and communicates by letter with host computer, system adopts serial ports that signal is transferred to host computer, after serial signal is made level conversion by chip, become serial port, this mouth and host computer communicate, accept the instruction of host computer, and the A/D transformation result is transferred to host computer.
Operation principle of the present utility model: this programme is based on the capacitor switching supervising device of single-chip microcomputer and configuration, by single-chip microcomputer as central control unit, load voltage, the sampled signal of electric current is through capacitance-resistance filter, amplifying element is sent into the A/D change-over circuit, the input channel of single-chip microcomputer is sent in the output of A/D change-over circuit, by the quick calculation process of software, obtain the required reactive power switching capacity of load, fast again zoom table decision should drop into the progression of capacitor, the control flow of deactivation capacitor switch, and according to the regular branch road of determining switched capacitor of binary coding, send the relative trigger useful signal then, dynamically do not have the ground of impact by thyristor and drop into capacitor; Host computer is followed the tracks of on-site parameters by real-time data base and is changed by serial line interface and single chip communication, and shows the various running statuses of current capacitor in real time.
Superiority of the present utility model and technique effect are: 1, adopted high-precision a/d converter, adopted ∑ Δ technology to finish the A/D conversion, reduced the bandwidth of analog signal effectively, satisfied the requirement of sampling thheorem; 2, the design of the high-grade single-chip microcomputer of Cai Yonging also can effectively improve the data processing precision of system; 3, adopt IGBT as switching device, break-make can realize dynamically following the tracks of fast compensation fast, can follow the tracks of the sudden change of impact load fast, keep best feed power factor at any time, realize quick dynamic passive compensation, thereby reduce mains fluctuations, improve power supply quality; 4, the communication interface of the host computer of this system and slave computer adopts serial communication interface, and host computer shows the major parameter of electrical network in real time, is convenient to enquiry of historical data and statistics demonstration; 5, this system can be widely used in the automatic adjusting of high pressure and low-voltage distribution system power capacitor reactive compensation installation, improves power factor of electric network.
(4) description of drawings:
Accompanying drawing 1 is the operation principle structural representation in the utility model related " based on the capacitor switching supervising device of single-chip microcomputer and configuration ".
Accompanying drawing 2 is the current/voltage input channel principle schematic in the utility model related " based on the capacitor switching supervising device of single-chip microcomputer and configuration ".
Accompanying drawing 3 is the amplification filtering electrical block diagram in the utility model related " based on the capacitor switching supervising device of single-chip microcomputer and configuration ".
Accompanying drawing 4 is the special-purpose amplifier architecture schematic diagram in the utility model related " based on the capacitor switching supervising device of single-chip microcomputer and configuration ".
Accompanying drawing 5 is the A/D converting circuit structure schematic diagram in the utility model related " based on the capacitor switching supervising device of single-chip microcomputer and configuration ".
Accompanying drawing 6 is the single chip machine controlling circuit structural representation in the utility model related " based on the capacitor switching supervising device of single-chip microcomputer and configuration ".
Accompanying drawing 7 is the power drive pipe electrical block diagram in the utility model related " based on the capacitor switching supervising device of single-chip microcomputer and configuration ".
Accompanying drawing 8 is the gate level turn-off thyristor electrical block diagram in the utility model related " based on the capacitor switching supervising device of single-chip microcomputer and configuration ".
Accompanying drawing 9 is the gate level turn-off thyristor electrical block diagram in the utility model related " based on the capacitor switching supervising device of single-chip microcomputer and configuration ".
(5) embodiment:
Embodiment: a kind of capacitor switching supervising device (see figure 1) based on single-chip microcomputer and configuration, it is characterized in that it is by being constituted as the configuration system of host computer with as the Single Chip Microcomputer (SCM) system of slave computer, and be connected by serial port with single-chip microcomputer as slave computer as the configuration system of host computer; Said configuration system as host computer is to constitute (see figure 9) by real-time data base and configuration software core; Said Single Chip Microcomputer (SCM) system as slave computer is partly to be made of analog quantity importation, amplification filtering circuit, A/D change-over circuit, microprocessor and storage area, power driving circuit, communication interface; The secondary terminal of said analog quantity importation external impressed current and voltage transformer, the analog quantity output connects the input of amplification filtering circuit, the output of amplification filtering circuit connects the input of A/D change-over circuit, the output of A/D change-over circuit connects the input of microprocessor and storage area, the output of microprocessor and storage area connects power driving circuit, and the output of microprocessor and storage area is connected with host computer by serial communication interface.
Above-mentioned said analog quantity importation (see figure 2) is the sampling system of electric current, voltage, the input of this part connects external voltage instrument transformer summation current transformer, its output connects the input of amplification filtering circuit, and sampling system is delivered to control system by voltage, current transformer after with the voltage of system, current signal digitlization; The 220V phase voltage is directly taken in the voltage input of voltage importation, adopt precision resistance dividing potential drop form to obtain the receptible output voltage of A/D, the electric current importation be three-phase current and neutral current behind external current transformer secondary side as the input variable of this part, adopt current transformer to carry out current transformation, secondary adds precision resistance, current information is converted to the receptible voltage of A/D, all installs electromagnetic compatibility and surge absorbing device during circuit design additional to improve antijamming capability.
Above-mentioned said amplification filtering circuit is used for the current and voltage signals of adopting is amplified, be beneficial to and carry out A/D conversion to reach certain amplitude, can constitute the differential amplifier (see figure 3) by resistance R 1, R2 capacitor C 1, C2, C3, C4, can also adopt meter specially amplifier INA126 (see figure 4).
Above-mentioned said A/D change-over circuit (see figure 5) is used for electric current after the amplification filtering and voltage signal are converted to the manageable digital signal of single-chip microcomputer; The AD7716A/D transducer is the high precision converter of 22 A/D, and its input is the signal after amplifier amplifies, and wherein A/D780 is the low noise precision voltage source, and the A/D that is used for AD7716 transforms reference voltage, and the output voltage of AD780 is an adjustable voltage.
Above-mentioned said microprocessor AT89S8252 and storage area (see figure 6) are made of CPU, clock chip, Flash memory, RAM, switching value input channel, switching value output channel etc.; Voltage, electric current insert the single-chip microcomputer hsi port after the A/D conversion, CPU by single-chip microcomputer carries out the data computation processing, send trigger impulse by the single-chip microcomputer high speed output, this trigger impulse carries out photoelectricity isolation and triode amplification (see figure 7) through power drive pipe circuit, offer the IGBT gate pole input (see figure 8) of gate level turn-off thyristor circuit, the conducting of control thyristor is used for switched capacitor; Clock adopts hardware clock, and the data tape of record has markers, and the Flash memory is used for the data of storage of collected, calculating and statistics; The switching value input then is used for monitoring the input state of capacitor, and the switching value output variable is sent into host computer, is handled by the host computer configuration software.
Above-mentioned said communication interface is provided with the RS232 interface chip MAX232 (see figure 6) of communicating by letter with host computer, system adopts serial ports that signal is transferred to host computer, after serial signal is made level conversion by the MAX232 chip, become the RS232 mouth, this mouth and host computer communicate, accept the instruction of host computer, and the A/D transformation result is transferred to host computer.
Claims (6)
1, a kind of capacitor switching supervising device based on single-chip microcomputer and configuration, it is characterized in that it is by being constituted as the configuration system of host computer with as the Single Chip Microcomputer (SCM) system of slave computer, and be connected by serial port with Single Chip Microcomputer (SCM) system as slave computer as the configuration system of host computer; Said configuration system as host computer is to be made of real-time data base and configuration software core; Said Single Chip Microcomputer (SCM) system as slave computer is partly to be made of analog quantity importation, amplification filtering circuit, A/D change-over circuit, microprocessor and storage area, power driving circuit, communication interface; The secondary terminal of said analog quantity importation external impressed current and voltage transformer, the analog quantity output connects the input of amplification filtering circuit, the output of amplification filtering circuit connects the input of A/D change-over circuit, the output of A/D change-over circuit connects the input of microprocessor and storage area, the output of microprocessor and storage area connects power driving circuit, and the output of microprocessor and storage area is connected with host computer by serial communication interface.
2, according to the said a kind of capacitor switching supervising device of claim 1 based on single-chip microcomputer and configuration, it is characterized in that said analog quantity importation is the sampling system of electric current, voltage, the input of this part connects external voltage instrument transformer summation current transformer, its output connects the input of amplification filtering circuit, and sampling system is delivered to control system by voltage, current transformer after with the voltage of system, current signal digitlization; The 220V phase voltage is directly taken in the voltage input of voltage importation, adopt precision resistance dividing potential drop form to obtain the receptible output voltage of A/D, the electric current importation be three-phase current and neutral current behind external current transformer secondary side as the input variable of this part, adopt current transformer to carry out current transformation, secondary adds precision resistance, current information is converted to the receptible voltage of A/D, all installs electromagnetic compatibility and surge absorbing device during circuit design additional to improve antijamming capability.
3, according to the said a kind of capacitor switching supervising device of claim 1 based on single-chip microcomputer and configuration, it is characterized in that said amplification filtering circuit is used for the current and voltage signals of adopting is amplified, be beneficial to and carry out A/D conversion to reach certain amplitude, can constitute differential amplifier by resistance R 1, R2 capacitor C 1, C2, C3, C4, can also adopt the meter specially amplifier.
4,, it is characterized in that said A/D change-over circuit is used for electric current after the amplification filtering and voltage signal are converted to the manageable digital signal of single-chip microcomputer according to the said a kind of capacitor switching supervising device of claim 1 based on single-chip microcomputer and configuration; The transducer input is the signal after amplifier amplifies, and wherein the low noise precision voltage source is used for A/D conversion reference voltage, and its output voltage is an adjustable voltage.
5, according to the said a kind of capacitor switching supervising device of claim 1, it is characterized in that said microprocessor and storage area are made of CPU, clock chip, Flash memory, RAM, switching value input channel, switching value output channel etc. based on single-chip microcomputer and configuration; Voltage, electric current insert the single-chip microcomputer hsi port after the A/D conversion, CPU by single-chip microcomputer carries out the data computation processing, send trigger impulse by the single-chip microcomputer high speed output, this trigger impulse carries out photoelectricity isolation and triode amplification through power drive pipe circuit, offer the IGBT gate pole input of gate level turn-off thyristor circuit, the conducting of control thyristor is used for switched capacitor; Clock adopts hardware clock, and the data tape of record has markers, and the Flash memory is used for the data of storage of collected, calculating and statistics; The switching value input then is used for monitoring the input state of capacitor, and the switching value output variable is sent into host computer, is handled by the host computer configuration system.
6, according to the said a kind of capacitor switching supervising device of claim 1 based on single-chip microcomputer and configuration, it is characterized in that said communication interface is provided with serial interface chip and communicates by letter with host computer, system adopts serial ports that signal is transferred to host computer, after serial signal is made level conversion by chip, become serial port, this mouth and host computer communicate, and accept the instruction of host computer, and the A/D transformation result is transferred to host computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201239247U CN2854893Y (en) | 2005-12-12 | 2005-12-12 | Capacitor switching monitoring device based on single-chip processor and configuration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201239247U CN2854893Y (en) | 2005-12-12 | 2005-12-12 | Capacitor switching monitoring device based on single-chip processor and configuration |
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| Publication Number | Publication Date |
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| CN2854893Y true CN2854893Y (en) | 2007-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2005201239247U Expired - Lifetime CN2854893Y (en) | 2005-12-12 | 2005-12-12 | Capacitor switching monitoring device based on single-chip processor and configuration |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100416968C (en) * | 2005-12-12 | 2008-09-03 | 天津理工大学 | Capacitor switching and monitoring system based on single chip microcomputer and configuration |
| CN105652691A (en) * | 2016-02-24 | 2016-06-08 | 中国地质大学（武汉） | Power electronic control simulation system |
| CN105703488A (en) * | 2016-05-03 | 2016-06-22 | 云南电网有限责任公司红河供电局 | Capacitor bank switching misoperation prevention system based on DF8003C |
| CN107300897A (en) * | 2017-07-14 | 2017-10-27 | 宁波三星医疗电气股份有限公司 | A kind of electrical equipment power consumption detecting system and management method |
-
2005
- 2005-12-12 CN CNU2005201239247U patent/CN2854893Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100416968C (en) * | 2005-12-12 | 2008-09-03 | 天津理工大学 | Capacitor switching and monitoring system based on single chip microcomputer and configuration |
| CN105652691A (en) * | 2016-02-24 | 2016-06-08 | 中国地质大学（武汉） | Power electronic control simulation system |
| CN105703488A (en) * | 2016-05-03 | 2016-06-22 | 云南电网有限责任公司红河供电局 | Capacitor bank switching misoperation prevention system based on DF8003C |
| CN107300897A (en) * | 2017-07-14 | 2017-10-27 | 宁波三星医疗电气股份有限公司 | A kind of electrical equipment power consumption detecting system and management method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080903 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |