CN202285332U - Reactive power compensation controller and low voltage dynamic reactive power compensation control device - Google Patents
Reactive power compensation controller and low voltage dynamic reactive power compensation control device Download PDFInfo
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- CN202285332U CN202285332U CN2011200956888U CN201120095688U CN202285332U CN 202285332 U CN202285332 U CN 202285332U CN 2011200956888 U CN2011200956888 U CN 2011200956888U CN 201120095688 U CN201120095688 U CN 201120095688U CN 202285332 U CN202285332 U CN 202285332U
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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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- 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
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model discloses a reactive power compensation controller used for performing reactive power compensation on a power grid and filtering harmonic waves and a low voltage dynamic reactive power compensation control device applied to the reactive power compensation controller. The reactive power compensation controller comprises a signal collector, a main-control central processing unit (CPU) and an auxiliary-control CPU, wherein the signal collector collects voltage signals and current signals of the external power grid and performs analog to digital (A/D) conversion to collected analog signals. The main-control CPU receives data collected by the signal collector, performs finite impulse response filter processing, and outputs reactor control angle signals and filter switching signals according to processing results. The auxiliary-control CPU is in communication connection with the main-control CUP, receives data transmitted by the main-control CPU, performs discrete fourier transformation analysis, and outputs resulting value to a peripheral device. The reactive power compensation controller substantially improves response speed and control accuracy of the low voltage dynamic reactive power compensation control device to external signals, and can effectively restrain voltage flicker of the power grid.
Description
Technical field
The utility model relates to a kind of idle compensating control, especially a kind of idle compensating control that is used for electrical network is carried out the filtering of reactive power compensation harmonic, and the low pressure dynamic passive compensation control device of using this idle compensating control.
Background technology
At present, along with enlarging day by day and the extensive use of power electronic equipment of scale of power, making has increased a large amount of nonlinear-loads in the electric power system, and electric power system has been produced very big influence.Impact, fluctuating loads such as arc furnace, heavy (merchant) mill, electric locomotive, large-scale semiconductor variable flow device are in operation and not only can produce a large amount of high order harmonic components, and make that fluctuation, flickering, the three-phase imbalance phenomenon of voltage are more serious.These adverse effects to electrical network have all caused the fail safe of power consumption equipment itself to reduce, and have seriously undermined and disturbed the economical operation of electrical network.In order to overcome these adverse effects of electrical network, need carry out the filtering of reactive power compensation harmonic to electrical network.
Idle compensating control commonly used at present is static passive compensation device (SVC), and its typical case's representative is the FC+TCR type.FC (filter) is made up of a plurality of single tuned filters usually, but the multiple harmonic on the filtering electrical network, and fixing capacitive reactive power can be provided.TCR (thyristor-controlled reactor) sends continuous lagging reactive power through the trigger angle of regulating its three-phase thyristor, realizes the dynamic compensation of reactive power.The SVC device can well improve the quality of power supply of electrical network, but it is to higher specification requirement is arranged from body controller, and it requires response speed fast, can carry out dynamic passive compensation accurately and rapidly, control system reliability service, complete safeguard protection etc.At present domestic SVC controller like the steel rolling type load, can carry out effective reactive power compensation control to the inviolent three-phase load of voltage flicker.But owing to exist response speed fast inadequately, and the high inadequately shortcoming of accuracy, the dynamic passive compensation weak effect of the load that domestic existing SVC controller is seriously uneven to this type of arc furnace three-phase load, voltage flicker is violent can not effectively suppress voltage flicker.Therefore develop a kind of variation of load-responsive rapidly and accurately, and the dynamic passive compensation controller that compensates fast is necessary.
The utility model content
To the problems referred to above, the utility model provides a kind of idle compensating control, especially a kind of idle compensating control that is used for electrical network is carried out the filtering of reactive power compensation harmonic, and the low pressure dynamic passive compensation control device of using this idle compensating control.Said idle compensating control has significantly improved response speed and the control precision of low pressure dynamic passive compensation control device to external signal on the basis of existing technology, can effectively suppress the voltage flicker of electrical network.
For achieving the above object, the utility model adopts following technical scheme:
A kind of idle compensating control; Comprise signal picker and monitoring element; Also comprise master cpu and auxilliary control CPU; Wherein: said signal picker is gathered line voltage, power network current, load current and the TCR reactor current of the external electrical network of analog signal form, and the above-mentioned analog signal that collects is carried out the A/D conversion; Said master cpu; Control the data acquisition of said signal picker; Receive the data that said signal picker collects, and the data that receive are carried out finite impulse response (FIR) (FIR) Filtering Processing, according to result out put reactor pilot angle signal and filter switching signal; Receive the accident analysis consequential signal of said auxilliary control CPU output, and according to this signal output control instruction corresponding; Said auxilliary control CPU is connected with said master cpu communication, receives the data of said master cpu transmission, and these data is carried out discrete Fourier transform (DFT) analyze, and exports the analysis result value to ancillary equipment; Receive the monitor signal that external monitoring element produces in real time, carry out accident analysis according to the monitor signal that receives, and to said master controller output accident analysis consequential signal.
Further, said master cpu is connected with said auxilliary control CPU communication through the field programmable gate array circuit; Said field programmable gate array circuit is set up said master cpu and is connected with communication between the said auxilliary control CPU, and the sample frequency of said signal picker is carried out 128 times frequency division.
Further, said signal picker is connected with said field programmable gate array circuit through a phase-locked loop circuit, said phase-locked loop circuit, the frequency of the outer welding system of monitoring and the sample frequency that the output frequency control command is controlled said signal picker.
Further, said idle compensating control also comprises: buffer and memory, all be connected with said auxilliary control CPU, and expand the memory capacity of said auxilliary control CPU.
Further, said idle compensating control also comprises the digital temperature sensor circuit, and said digital temperature sensor circuit is connected with said auxilliary control CPU, to the said auxilliary temperature information that CPU input digit scale shows of controlling.
A kind of low pressure dynamic passive compensation control device comprises filter, thyristor-controlled reactor and idle compensating control, and wherein, said idle compensating control is aforementioned any idle compensating control.Preferably, the circuit board of said idle compensating control adopts four layers of pcb board design.
Further, the switching executive component of said filter is a thyristor.
Further, the pulse-triggered plate in the said low pressure dynamic passive compensation control device all is connected through the communication of the self-corresponding power trigger plate of optical fiber and each with filter zero cross fired plate.
Compared with prior art, the advantage of the utility model is:
Said idle compensating control has adopted the two system control cpus of master cpu with auxilliary control CPU; Giving master cpu with the calculation function of controller handles; Give auxilliary control CPU processing with the communication function and the warning function of controller; Have high arithmetic speed and high-precision chip can improve response speed and the control precision of said idle compensating control to external signal greatly as master cpu through selecting for use, can effectively suppress the voltage flicker of electrical network;
Signal picker can be sampled and the A/D conversion to the external electrical network data of analog signal form; And realize the frequency change of sample frequency from the motion tracking system under test (SUT) with phase-locked loop circuit; Make that not only the response speed of said idle compensating control is faster; Also improved the antijamming capability of controller, made the performance of said idle compensating control more reliable and more stable;
Temperature sensor circuit is the temperature of monitoring of environmental temperature and three TCR reactors simultaneously, and in time sends temperature value to auxilliary control CPU and handle, thereby realizes the temperature overheating of said low pressure dynamic passive compensation control device is reported to the police and protection;
Said monobus digital temperature sensor chip can realize that multi-plate chip is connected on the communication bus, thereby auxilliary control CPU only needs a root port line just can carry out communication with the multi-disc temperature sensor chip, can save a large amount of lead-in wires and logical circuit;
Make realization photoelectricity isolation between control signal and the thyristor through optical fiber, help to improve the antijamming capability of circuit;
The design of four layers of pcb board further improves the antijamming capability of said idle compensating control.
Description of drawings
Below in conjunction with accompanying drawing the embodiment of the utility model is done further detailed explanation.
Fig. 1 is the schematic diagram of the utility model mesolow dynamic passive compensation control device;
Fig. 2 is the schematic block circuit diagram of idle compensating control among Fig. 1;
Fig. 3 is ten two tunnel analog signal synchronized sampling theory diagrams;
Fig. 4 is a digital temperature sensor monobus communicating circuit schematic diagram among Fig. 2.
Embodiment
Below in conjunction with Figure of description the utility model is done further description.
A kind of idle compensating control comprises signal picker and monitoring element, also comprises master cpu and auxilliary control CPU, wherein:
Said master cpu; Control the data acquisition of said signal picker; Receive the data that said signal picker collects, and the data that receive are carried out finite impulse response (FIR) (FIR) Filtering Processing, according to result out put reactor pilot angle signal and filter switching signal; Receive the accident analysis consequential signal of said auxilliary control CPU output, and according to this signal output control instruction corresponding;
Said auxilliary control CPU is connected with said master cpu communication, receives the data of said master cpu transmission, and these data is carried out discrete Fourier transform (DFT) analyze, and exports the analysis result value to ancillary equipment; Receive the monitor signal of external monitoring element output in real time, carry out accident analysis according to the monitor signal that receives, and to said master controller output accident analysis consequential signal.
Said master cpu is connected with said auxilliary control CPU communication through the field programmable gate array circuit; Said field programmable gate array circuit is set up said master cpu and is connected with communication between the said auxilliary control CPU, and the sample frequency of said signal picker is carried out 128 times frequency division.
Said signal picker is connected with said field programmable gate array circuit through a phase-locked loop circuit; Said phase-locked loop circuit, the frequency of the outer welding system of monitoring and the sample frequency that the output frequency control command is controlled said signal picker, also comprise: buffer and memory all are connected with the communication of said auxilliary control cpu data.
Said monitoring element is made up of at least one temperature measuring circuit, and said temperature measuring circuit is connected with said auxilliary control CPU through monobus, to said auxilliary control CPU input temp information.
A kind of low pressure dynamic passive compensation control device comprises filter and idle compensating control at least, and said idle compensating control is above-mentioned idle compensating control.
The circuit board of said idle compensating control is made up of four layer printed circuit boards.The switching executive component of said filter is a thyristor.Pulse-triggered plate in the described low pressure dynamic passive compensation control device all is connected through the communication of the self-corresponding power trigger plate of optical fiber and each with filter zero cross fired plate.
Embodiment one
Referring to Fig. 1, said low pressure dynamic passive compensation control device comprises idle compensating control, a TCR (thyristor-controlled reactor) and three TSF (thyristor switched filter).6 TCR among the figure for the triangle connection, 1 is five filtering TSF of Y-connection, and 2 is seven filtering TSF of Y-connection, and 3 is ten filtering TSF of Y-connection.Current transformer CT1 gathers load current, and current transformer CT2 gathers power network current, and current transformer CT3 gathers the line current of TCR; Voltage transformer pt 1 is gathered line voltage; Above-mentioned four groups of current and voltage signals that collect are analog signal, and totally ten two the tunnel, this analog signal of ten two tunnel is passed to idle compensating control and is carried out uniformly-spaced synchronized sampling of A/D; Idle compensating control is handled and is calculated sampled value, implements the reactive power compensation control of three-phase imbalance load.TCR pilot angle signal that idle compensating control is exported and TSF filter switching signal are passed to TCR pulse-triggered plate and filter zero cross fired plate respectively accordingly.TCR pulse-triggered plate and filter zero cross fired plate output electric pulse are given optical transmitter, become light signal, and light signal is given optical receiver through optical fiber then.Optical receiver converts light signal into the signal of telecommunication, gives output pulses trigger board 4.Output pulses trigger board 4 changes the low power electric pulse of input into the large power, electrically pulse, triggers thyristor.Synchrotrans PT2 is the synchronous voltage signal that TCR pulse-triggered plate provides line voltage.Idle compensating control when the switching filter, according to five times earlier, seven times again, last ten once order inputs; According to elder generation ten once, seven times again, last five times order is turn-offed during the surgical filtering device.The low pressure dynamic passive compensation control device of present embodiment can rapidly, accurately be implemented the reactive power compensation control of three-phase imbalance load, thereby effectively suppresses the voltage flicker of electrical network.
Referring to Fig. 2, said idle compensating control comprises: auxilliary control CPU18, control the communication of said idle compensating control and external equipment; FLASH memory 17 and SDRAM memory 16 are used to expand the memory capacity of assisting control CPU18; Display 19 is that LCD and keyboard input 12 realize the man-machine communication with auxilliary control CPU18 together; Auxilliary control CPU18 is through serial communication interface 15 and upper machine communication; Digital temperature sensor 20 is measured the temperature of low pressure dynamic passive compensation control device; Auxilliary control CPU18 and master cpu 9 are realized mutual communication through FPGA7 (field programmable gate array); FPGA7 carries out 128 times frequency division to phase-locked loop 8, and phase-locked loop 8 provides synchronous sampling signal for A/D conversion 10; Input 11 of master cpu 9 control figure amounts and digital quantity output 13; 10 pairs ten two tunnel analog signals of master cpu 9 control A/D conversions are carried out synchronized sampling; And sampled value carried out the FIR digital filtering; Calculate the pilot angle signal of each phase of TCR and the switching signal of filter; Carry out the reactive power compensation control of three-phase imbalance load, the switching signal of output TCR pilot angle signal and filter, TCR pilot angle signal becomes voltage signal through D/A conversion 14.Above-mentioned master cpu is selected the DSP28335 chip for use; Auxilliary control CPU18 selects the DSP2812 chip for use; FPGA adopts cheaply, and the model of Cyclone series is the chip of EP1C4; The A/D sample circuit comprises the ADS8364 chip that two American TI Company are produced, and the analog phase-locked look circuit of phase-locked loop for adopting CD4046 to constitute, temperature measuring circuit adopt four monobus digital temperature sensor DS18B20 chips to constitute.
Referring to Fig. 3; Master cpu carries out synchronized sampling to ten two tunnel analog signals; Need carry out through the A/D conversion 10 that comprises two ADS8364 chips;
on
on ADS8364 (1) chip and
three ports and ADS8364 (2) chip and
three ports are linked together; Be connected with the output of phase-locked loop again; With the output frequency of the phase-locked loop synchronous sampling signal as ten two tunnel analog signals, thereby master cpu is controlled the uniformly-spaced synchronized sampling of ten two tunnel analog signals and is read sampled value.
Referring to Fig. 4, the monobus of auxilliary control CPU connects the pull-up resistor of a 4.7K, the other end of resistance receives+the 5V power supply on, data wire is drawn on can be automatically under idle condition is high level.Monobus links to each other with the DQ port of 4 digital temperature sensor DS18B20 respectively; The whole ground connection of GND port of 4 DS18B20; Power port VDD all receives+the 5V power supply on, auxilliary control CPU obtains the temperature value measured of wanting through a root port line and the communication of 4 DS18B20 realization monobus.
More than; Be merely the preferred embodiment of the utility model; But the protection range of the utility model is not limited thereto; Any technical staff who is familiar with the present technique field is in the technical scope that the utility model discloses, and the variation that can expect easily or replacement all should be encompassed within the protection range of the utility model.Therefore, the protection range of the utility model should be as the criterion with the protection range that claim was defined.
Claims (9)
1. an idle compensating control comprises signal picker and monitoring element, it is characterized in that, also comprises master cpu and auxilliary control CPU, wherein:
Said master cpu; Control the data acquisition of said signal picker; Receive the data that said signal picker collects, and the data that receive are carried out finite impulse response (FIR) (FIR) Filtering Processing, according to result out put reactor pilot angle signal and filter switching signal; Receive the accident analysis consequential signal of said auxilliary control CPU output, and according to this signal output control instruction corresponding;
Said auxilliary control CPU is connected with said master cpu communication, receives the data of said master cpu transmission, and these data is carried out discrete Fourier transform (DFT) analyze, and exports the analysis result value to ancillary equipment; Receive the monitor signal of external monitoring element output in real time, carry out accident analysis according to the monitor signal that receives, and to said master controller output accident analysis consequential signal.
2. idle compensating control as claimed in claim 1 is characterized in that, said master cpu is connected with said auxilliary control CPU communication through the field programmable gate array circuit;
Said field programmable gate array circuit is set up said master cpu and is connected with communication between the said auxilliary control CPU, and the sample frequency of said signal picker is carried out 128 times frequency division.
3. idle compensating control as claimed in claim 2 is characterized in that, said signal picker is connected with said field programmable gate array circuit through a phase-locked loop circuit; Said phase-locked loop circuit, the frequency of the outer welding system of monitoring and the sample frequency that the output frequency control command is controlled said signal picker.
4. idle compensating control as claimed in claim 1 is characterized in that, also comprises: buffer and memory all are connected with the communication of said auxilliary control cpu data.
5. idle compensating control as claimed in claim 1 is characterized in that said monitoring element is made up of at least one temperature measuring circuit, and said temperature measuring circuit is connected with said auxilliary control CPU through monobus, to said auxilliary control CPU input temp information.
6. a low pressure dynamic passive compensation control device comprises filter and idle compensating control at least, it is characterized in that, said idle compensating control is each described idle compensating control in the claim 1 to 5.
7. low pressure dynamic passive compensation control device as claimed in claim 6 is characterized in that the circuit board of said idle compensating control is made up of four layer printed circuit boards.
8. low pressure dynamic passive compensation control device as claimed in claim 6 is characterized in that the switching executive component of said filter is a thyristor.
9. low pressure dynamic passive compensation control device as claimed in claim 6 is characterized in that, the pulse-triggered plate in the described low pressure dynamic passive compensation control device all is connected through the communication of the self-corresponding power trigger plate of optical fiber and each with filter zero cross fired plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200956888U CN202285332U (en) | 2011-04-02 | 2011-04-02 | Reactive power compensation controller and low voltage dynamic reactive power compensation control device |
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| CN2011200956888U CN202285332U (en) | 2011-04-02 | 2011-04-02 | Reactive power compensation controller and low voltage dynamic reactive power compensation control device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698635A (en) * | 2013-12-23 | 2014-04-02 | 国电南京自动化股份有限公司 | Saturation A/D (Analog/Digital) sampling method based on high-voltage static reactive compensation device |
| CN104393605A (en) * | 2014-10-23 | 2015-03-04 | 哈尔滨工业大学 | Reactive continuous compensation control method for thyristor switched filter |
| CN106208107A (en) * | 2016-08-30 | 2016-12-07 | 泉州维盾电气有限公司 | A kind of novel low-voltage reactive compensation control device |
| CN113193566A (en) * | 2021-06-02 | 2021-07-30 | 台州安耐杰电力设备有限公司 | Intelligent integrated hybrid dynamic reactive compensation control system |
-
2011
- 2011-04-02 CN CN2011200956888U patent/CN202285332U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698635A (en) * | 2013-12-23 | 2014-04-02 | 国电南京自动化股份有限公司 | Saturation A/D (Analog/Digital) sampling method based on high-voltage static reactive compensation device |
| CN103698635B (en) * | 2013-12-23 | 2016-06-08 | 国电南京自动化股份有限公司 | The saturated A/D method of sampling based on high pressure static reactive power compensator |
| CN104393605A (en) * | 2014-10-23 | 2015-03-04 | 哈尔滨工业大学 | Reactive continuous compensation control method for thyristor switched filter |
| CN106208107A (en) * | 2016-08-30 | 2016-12-07 | 泉州维盾电气有限公司 | A kind of novel low-voltage reactive compensation control device |
| CN113193566A (en) * | 2021-06-02 | 2021-07-30 | 台州安耐杰电力设备有限公司 | Intelligent integrated hybrid dynamic reactive compensation control system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120627 Termination date: 20190402 |