CN104485674A - Dual-DSP high-speed static reactive generation module - Google Patents
Dual-DSP high-speed static reactive generation module Download PDFInfo
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- CN104485674A CN104485674A CN201410795094.6A CN201410795094A CN104485674A CN 104485674 A CN104485674 A CN 104485674A CN 201410795094 A CN201410795094 A CN 201410795094A CN 104485674 A CN104485674 A CN 104485674A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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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
The invention provides a dual-DSP (digital signal processor) high-speed static reactive generation module which comprises a current and voltage signal acquisition module, an FPGA (field programmable gate array) chip, a first DSP chip, a second DSP chip, a current transformation module and a grid access module, wherein the FPGA chip reads a current and voltage signal, which is acquired by the current and voltage signal acquisition module, of a power grid and outputs the current and voltage signal to the first DSP chip; the first DSP chip analyzes a power grid reactive current signal, a harmonic signal and an unbalanced current signal, generates an instruction current signal opposite to the current directions of these signals and outputs the instruction current signal to the second DSP chip; the second DSP chip calculates a duty ratio of a PWM (pulse width modulation) signal according to the instruction current signal and outputs the duty ratio to the FPGA chip; the FPGA chip modulates a PWM signal and outputs the PWM signal to the current transformation module; the current transformation module generates compensation current which is equal to harmonic current of the power grid in size and is opposite to the harmonic current in direction, and then the compensation current is injected into the power grid through the grid access module. The dual-DSP high-speed static reactive generation module has the advantages of high adjustment speed, wide running range, realization of bidirectional compensation of sensibility and capacitivity and continuous smooth compensation.
Description
Technical field
The present invention relates to power equipment reactive power compensation technology field, particularly relate to a kind of two CSTR high speed stillness wattless occurrence apparatus.
Background technology
Along with the fast development of national economy, power electronic product is in a large number for modern industry control field, also more and more higher to the requirement of the quality of power supply, and wherein the most outstanding is the problem of quality of voltage and harmonic quality.For quality of voltage, mainly voltage magnitude does not meet quality of power supply requirement, namely because the unfavorable of Reactive-power control causes.Because electric network reactive compensation is not enough, electrical network causes line voltage to raise up because of the impact of idle surplus under Smaller load runs, the circuit of the long approximate no-load running again of some transmission ranges need be disconnected or reactor is installed to carry out avoiding device voltage too higher, when load level rises, cause line voltage on the low side.In electrical network, the transmission of reactive power not only can produce very large active loss, and also can produce very large voltage-drop along delivering path, makes apparent power increase simultaneously, this will produce series of negative impact to device, as increased place capacity, line loss, power factor reduces etc.
At present, thyristor switchable capacitor TSC has that cost is low, reliability comparatively advantages of higher, is widely applied in electric device, but thyristor switchable capacitor TSC exist classification regulate, continuously poor controllability, the shortcomings such as continuously smooth compensation can not be realized.The high frequency carrier that reactive power compensator of the prior art self produces also can cause secondary pollution by feedback grid, and easily overcompensation, and therefore prior art is difficult to meet the new demand that modern power network proposes reactive power compensation technology.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, there is provided that a kind of governing speed is fast, range of operation is wide, can realize the bidirectional compensating of perception and capacitive, continuously smooth compensates, and limits the two CSTR high speed stillness wattless occurrence apparatus of offset current automatically and reasonably.
The present invention is achieved in that a kind of two CSTR high speed stillness wattless occurrence apparatus, be electrically connected with electrical network, it is characterized in that, comprise current and voltage signals acquisition module, fpga chip, the first dsp chip, the second dsp chip, unsteady flow module and grid integration module;
Described current and voltage signals acquisition module output is electrically connected described fpga chip input, the output of described fpga chip is electrically connected the input of described first dsp chip and the input of described second dsp chip respectively, the data switching port of described first dsp chip and the data switching port of described second dsp chip are electrically connected, described fpga chip is for the current signal in the electrical network that reads described current and voltage signals acquisition module and collect and voltage signal and described current signal and described voltage signal are exported to described first dsp chip, described first dsp chip is for analyzing the reactive current signal of described electrical network, harmonic signal, unsymmetrical current signal also forms instruction current signal and exports described second dsp chip, the sense of current of described instruction current signal and the reactive current signal of described electrical network, harmonic current, the sense of current of unsymmetrical current signal is contrary, described second dsp chip be used for according to described instruction current signal and in conjunction with PI regulate Voltage loop control algolithm and dead-beat current loop control algorithm calculate the duty ratio of pwm signal and the duty ratio of described pwm signal exported to described fpga chip, described fpga chip is used for going out pwm signal according to the duty ratio modulation of described pwm signal and outputting to described unsteady flow module, described unsteady flow module is equal with harmonic wave size of current for forming one according to pwm signal, the offset current that direction is contrary, described grid integration module is used for described offset current to be injected in described electrical network.
Further, grid-connected current acquisition module and plant running state acquisition module is also comprised;
The compensating current signal that described grid-connected current acquisition module exports for gathering described grid integration module, and described compensating current signal is outputted to described fpga chip, described compensating current signal and described instruction current signal are carried out phase compare by described fpga chip, and perform phase-locked loop calculating, described fpga chip regulates described pwm signal according to result of calculation, makes the offset current of output have correct phase place; Described operating state signal for gathering the operating state signal of described device, and is fed back to described fpga chip by described plant running state acquisition module, and described fpga chip makes corresponding control action according to described operating state signal.
Further, described current and voltage signals acquisition module comprises current transformer, voltage transformer, operational amplifier, AD acquisition module;
Described operational amplifier and described voltage transformer constitute Signal-regulated kinase jointly, described current transformer detects power network current signal, and the current signal of electrical network is transferred to small voltage signal and input described operational amplifier and carry out amplifying the voltage signal that converts to and match with described AD acquisition module and export to described AD acquisition module, simultaneously mains voltage signal is transferred to the voltage signal that matches with described AD acquisition module and exports to described AD acquisition module by described voltage transformer, described AD acquisition module sends to described fpga chip after the signal sampled is carried out analog-to-digital conversion in real time.
Further, described unsteady flow module comprises IGBT driver element, be electrically connected at the IGBT switch element of described IGBT driver element output, described IGBT driver element comprises NAND gate circuit, IGBT driving chip and isolating transformer, the input of described NAND gate circuit is connected with the output of described fpga chip, for receiving the pwm signal that described fpga chip modulates, described pwm signal enters the drive singal of described IGBT driving chip formation for driving described IGBT switch element after described NAND gate circuit shaping exports, described drive singal outputs to the drive end of described IGBT switch element through described isolating transformer.
Further, described IGBT driving chip comprises soft switching input, and described soft switching input is electrically connected by the control output end of the first control line and fpga chip.
Further, described grid integration module comprises low-pass filter unit and reactor, output and the described reactor input of described low-pass filter unit are electrically connected, the HF switch harmonic wave that described low-pass filter unit is formed for filtering described IGBT switch element.
Further, described grid integration module also comprises contactor, and between the output that described contactor is connected to described reactor and electrical network, the control end of described contactor is connected to the control signal output of described fpga chip by the second control line.
Further, described plant running state acquisition module comprises heatsink temperature sensor, the operating state transducer of IGBT switch element, the DC bus overcurrent-overvoltage transducer of IGBT switch element, contactor temperature sensor, the device radiation fan running status transducer of IGBT switch element, and the double operational filtering conditioning unit be electrically connected with each transducer one_to_one corresponding.
Further, also comprise man-machine interface, described man-machine interface is touch-screen, and it is communicated with the first dsp chip or fpga chip by 485 interfaces, and described man-machine interface is used for the parameter waveform of display unit operating state, each index.
Further, also comprise Background communication module, the interface of described Background communication module adopts standard communication interface, for providing the passage run with the connection of top level control device and parallel operation.
Beneficial effect of the present invention: the invention provides a kind of two CSTR high speed stillness wattless occurrence apparatus, this device governing speed is fast, range of operation is wide, can realize the bidirectional compensating of perception and capacitive, continuously smooth compensates, and can limit offset current automatically and reasonably.
Accompanying drawing explanation
In order to be illustrated more clearly in technical scheme of the present invention, be briefly described to the accompanying drawing used required in execution mode below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained from these accompanying drawings.
Fig. 1 is the structured flowchart of two CSTR high speed stillness wattless occurrence apparatus of the present invention preferred embodiment;
Fig. 2 is the current and voltage signals acquisition module structured flowchart of two CSTR high speed stillness wattless occurrence apparatus of the present invention preferred embodiment;
Fig. 3 is the unsteady flow modular structure block diagram of two CSTR high speed stillness wattless occurrence apparatus of the present invention preferred embodiment;
Fig. 4 is the grid integration modular structure block diagram of two CSTR high speed stillness wattless occurrence apparatus of the present invention preferred embodiment.
Fig. 5 is the plant running state acquisition modular structure block diagram of two CSTR high speed stillness wattless occurrence apparatus of the present invention preferred embodiment.
Embodiment
Below in conjunction with the accompanying drawing in embodiment of the present invention, the technical scheme in embodiment of the present invention is clearly and completely described.The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Fig. 1 is the structured flowchart of two CSTR high speed stillness wattless occurrence apparatus of the present invention preferred embodiment.This device and electrical network are electrically connected, and comprise current and voltage signals acquisition module 1, fpga chip 2, first dsp chip 3, second dsp chip 4, unsteady flow module 5 and grid integration module 6.
Described current and voltage signals acquisition module 1 output is electrically connected described fpga chip 2 input, the output of described fpga chip 2 is electrically connected the input of described first dsp chip 3 and the input of described second dsp chip 4 respectively, the data switching port of described first dsp chip 3 and the data switching port of described second dsp chip 4 are electrically connected, described fpga chip 2 is for the current signal in the electrical network that reads described current and voltage signals acquisition module 1 and collect and voltage signal and described current signal and described voltage signal are exported to described first dsp chip 3, described first dsp chip 3 is for analyzing the reactive current signal of described electrical network, harmonic signal, unsymmetrical current signal also forms instruction current signal and exports described second dsp chip 4.The sense of current of described instruction current signal is contrary with the sense of current of the reactive current signal of described electrical network, harmonic current, unsymmetrical current signal.Described second dsp chip 4 for according to described instruction current signal and in conjunction with PI regulate Voltage loop control algolithm and dead-beat current loop control algorithm calculate the duty ratio of pwm signal and the duty ratio of described pwm signal exported to described fpga chip 2, described fpga chip 2 is for going out pwm signal according to the duty ratio modulation of described pwm signal and outputting to described unsteady flow module 5.Described unsteady flow module 5 is equal with harmonic wave size of current for forming one according to described pwm signal, and the offset current that direction is contrary, described grid integration module 6 is for being injected into described offset current in described electrical network.Voltage loop adopts PI to regulate, and wherein proportional component reflects the deviation signal of control device in time, and signal is once produce, and controller produces control action immediately, to reduce deviation; Integral element be mainly used in eliminate static difference, improve device without margin; Electric current loop adopts track with zero error, and in each switch periods, calculate the duty ratio of unsteady flow module in once switch periods, make current tracking reference current, have current tracking quick, algorithm is easy to the advantages such as Digital Implementation.This technical scheme is with prior art part of emulating the advanced mutually: this plant running wide ranges, can realize the bidirectional compensating of perception and capacitive, and continuously smooth compensates, and adopts two CSTR analysis, controls to make governing speed fast.
This device comprises grid-connected current acquisition module 7 and plant running state acquisition module 8 further, described grid-connected current acquisition module 7 gathers the compensating current signal that grid integration module 6 exports, and output to described fpga chip 2, this compensating current signal and instruction current signal is carried out phase compare by described fpga chip 2, and perform phase-locked loop calculating and according to result of calculation, the pwm signal that described fpga chip 2 is formed regulated, the offset current of output is made to have correct phase place, the plant running status signal collected is fed back to described fpga chip 2 by described plant running state acquisition module 8, corresponding control action is made according to operating state signal by described fpga chip 2, such as find that the temperature which transducer collects is too high, the abnormal conditions such as radiator fan breaks down, described fpga chip 2 control device quits work and sends the alarm of different sound.This technical scheme is with prior art part of emulating the advanced mutually: the plant running status signal of the compensating current signal that this device feed back according to grid-connected current acquisition module 7 and plant running state acquisition module 8 feedback limits the offset current inputting electrical network automatically and reasonably, avoids overcompensation.
Fig. 2 is current and voltage signals acquisition module 1 structured flowchart of two CSTR high speed stillness wattless occurrence apparatus of the present invention preferred embodiment.Described current and voltage signals acquisition module 1 comprises current transformer 11, voltage transformer 12, operational amplifier 13, AD acquisition module 14.
Described operational amplifier 13 constitutes Signal-regulated kinase 123 jointly with described voltage transformer 12.Described current transformer 11 pairs of power network current signals detect, and the current signal of electrical network are transferred to small voltage signal and input described operational amplifier 13 and carry out amplifying the voltage signal that converts to and match with described AD acquisition module 14 and export to described AD acquisition module 14.Simultaneously, mains voltage signal is transferred to the voltage signal that matches with described AD acquisition module 14 and exports to described AD acquisition module 14 by described voltage transformer 12, and described AD acquisition module 14 sends to described fpga chip 2 after the signal sampled is carried out analog-to-digital conversion in real time.This technical scheme is with prior art part of emulating the advanced mutually: 1. can realize synchronously carrying out long-time sampling 2. sampling more accurately to voltage and current signal, minimizing error.
Fig. 3 is unsteady flow module 5 structured flowchart of two CSTR high speed stillness wattless occurrence apparatus of the present invention preferred embodiment.Described unsteady flow module 5 comprises IGBT driver element 51, be connected to the IGBT switch element 52 of described IGBT driver element 51 output, described IGBT driver element 51 comprises NAND gate circuit 511, IGBT driving chip 512 and isolating transformer 513, the input of described NAND gate circuit 511 is connected with the output of described fpga chip 2, receive the pwm signal that described fpga chip 2 modulates, described pwm signal enters described IGBT driving chip 512 through described NAND gate circuit 511 shaping output and forms described IGBT switch element 52 drive singal, described IGBT switch element 52 drive singal outputs to the drive end of described IGBT switch element 52 through described isolating transformer 513.Described IGBT driving chip 512 comprises soft switching input, and described soft switching input is electrically connected by the control output end of the first control line and fpga chip 2.The function of the integrated overvoltage of described IGBT driving chip 512, overcurrent, excess temperature, soft switching.This technical scheme is with prior art part of emulating the advanced mutually: this device has antioverloading, overvoltage, under-voltage, overcurrent function.
Fig. 4 is grid integration module 6 structured flowchart of two CSTR high speed stillness wattless occurrence apparatus of the present invention preferred embodiment.Described grid integration module 6 comprises low-pass filter unit 61 and reactor 62, the HF switch harmonic wave that described low-pass filter unit 61 is formed in order to filter IGBT switch element 52, output and described reactor 62 input of described low-pass filter unit 61 are electrically connected.Described grid integration module 6 also comprises contactor 63.Contactor can not only be connected and cut off circuit, but also has the effect of low-voltage release guard, is applicable to frequent operation and far distance controlled.The input of described contactor 63 and the output of described reactor 62 are electrically connected, and the output of described contactor 63 is electrically connected electrical network, and the control end of described contactor 63 is electrically connected to the control signal output of described fpga chip 2 by the second control line.
Fig. 5 is plant running state acquisition module 8 structured flowchart of two CSTR high speed stillness wattless occurrence apparatus of the present invention preferred embodiment.Described plant running state acquisition module 8 comprises heatsink temperature sensor 81, the operating state transducer 82 of IGBT switch element, the DC bus overcurrent-overvoltage transducer 83 of IGBT switch element, contactor temperature sensor 84, the device radiation fan running status transducer 85 of IGBT switch element, and the double operational filtering conditioning unit 86 be electrically connected with each transducer one_to_one corresponding.
This device also comprises man-machine interface 9, described man-machine interface 9 is touch-screen, it is communicated with the first dsp chip 3 by 485 interfaces, described man-machine interface 9 is in order to display unit operating state, each index (voltage, electric current etc.) parameter waveform, this device also comprises Background communication module 10, and described Background communication module 10 interface adopts standard communication interface, to provide the passage run with the connection of top level control device and parallel operation.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.All any amendments done within the spirit and principles in the present invention, equivalent to replace and improvement etc., within the protection range that all should be included in the claims in the present invention.
Claims (10)
1. a two CSTR high speed stillness wattless occurrence apparatus, is electrically connected with electrical network, it is characterized in that, comprises current and voltage signals acquisition module, fpga chip, the first dsp chip, the second dsp chip, unsteady flow module and grid integration module;
Described current and voltage signals acquisition module output is electrically connected described fpga chip input, the output of described fpga chip is electrically connected the input of described first dsp chip and the input of described second dsp chip respectively, the data switching port of described first dsp chip and the data switching port of described second dsp chip are electrically connected, described fpga chip is for the current signal of described electrical network that reads described current and voltage signals acquisition module and collect and voltage signal and described current signal and described voltage signal are exported to described first dsp chip, described first dsp chip is for analyzing the reactive current signal of described electrical network, harmonic signal, unsymmetrical current signal also forms instruction current signal and exports described second dsp chip, the sense of current of described instruction current signal and the reactive current signal of described electrical network, harmonic current, the sense of current of unsymmetrical current signal is contrary, described second dsp chip be used for according to described instruction current signal and in conjunction with PI regulate Voltage loop control algolithm and dead-beat current loop control algorithm calculate the duty ratio of pwm signal and the duty ratio of described pwm signal exported to described fpga chip, described fpga chip is used for going out described pwm signal according to the duty ratio modulation of described pwm signal and outputting to described unsteady flow module, described unsteady flow module is equal with harmonic wave size of current for forming one according to described pwm signal, the offset current that direction is contrary, described grid integration module is used for described offset current to be injected in described electrical network.
2. two CSTR high speed stillness wattless occurrence apparatus according to claim 1, is characterized in that, also comprises grid-connected current acquisition module and plant running state acquisition module;
The compensating current signal that described grid-connected current acquisition module exports for gathering described grid integration module, and described compensating current signal is outputted to described fpga chip, described compensating current signal and described instruction current signal are carried out phase compare by described fpga chip, and perform phase-locked loop calculating, described fpga chip regulates described pwm signal according to result of calculation, makes the offset current of output have correct phase place; Described plant running state acquisition module is for gathering the operating state signal of described two CSTR high speed stillness wattless occurrence apparatus, and described operating state signal is fed back to described fpga chip, described fpga chip makes corresponding control action according to described operating state signal.
3. two CSTR high speed stillness wattless occurrence apparatus according to claim 1, is characterized in that, described current and voltage signals acquisition module comprises current transformer, voltage transformer, operational amplifier, AD acquisition module;
Described operational amplifier and described voltage transformer form Signal-regulated kinase jointly, described current transformer detects power network current signal, and the current signal of electrical network is transferred to small voltage signal and input described operational amplifier and carry out amplifying the voltage signal that converts to and match with described AD acquisition module and export to described AD acquisition module, simultaneously the voltage signal of electrical network is converted to the small voltage signal that matches with described AD acquisition module and exports to described AD acquisition module by described voltage transformer, described AD acquisition module sends to described fpga chip after the signal sampled is carried out analog-to-digital conversion process in real time.
4. two CSTR high speed stillness wattless occurrence apparatus according to claim 1, it is characterized in that, described unsteady flow module comprises IGBT driver element, be electrically connected at the IGBT switch element of described IGBT driver element output, described IGBT driver element comprises NAND gate circuit, IGBT driving chip and isolating transformer, the input of described NAND gate circuit is connected with the output of described fpga chip, for receiving the pwm signal that described fpga chip modulates, described pwm signal enters the drive singal of described IGBT driving chip formation for driving described IGBT switch element after described NAND gate circuit shaping exports, described drive singal outputs to the drive end of described IGBT switch element through described isolating transformer.
5. two CSTR high speed stillness wattless occurrence apparatus according to claim 4, is characterized in that, described IGBT driving chip comprises soft switching input, and described soft switching input is electrically connected by the control output end of the first control line and fpga chip.
6. two CSTR high speed stillness wattless occurrence apparatus according to claim 1, it is characterized in that, described grid integration module comprises low-pass filter unit and reactor, output and the described reactor input of described low-pass filter unit are electrically connected, the HF switch harmonic wave that described low-pass filter unit is formed for filtering described IGBT switch element.
7. two CSTR high speed stillness wattless occurrence apparatus according to claim 6, it is characterized in that, described grid integration module also comprises contactor, between the output that described contactor is connected to described reactor and electrical network, the control end of described contactor is connected to the control signal output of described fpga chip by the second control line.
8. two CSTR high speed stillness wattless occurrence apparatus according to claim 2, it is characterized in that, described plant running state acquisition module comprises heatsink temperature sensor, the operating state transducer of IGBT switch element, the DC bus overcurrent-overvoltage transducer of IGBT switch element, contactor temperature sensor, the device radiation fan running status transducer of IGBT switch element, and the double operational filtering conditioning unit be electrically connected with each transducer one_to_one corresponding.
9. two CSTR high speed stillness wattless occurrence apparatus according to claim 1, it is characterized in that, also comprise man-machine interface, described man-machine interface is touch-screen, it is communicated with the first dsp chip or fpga chip by 485 interfaces, and described man-machine interface is for showing the parameter waveform of the static Reactive Power Device operating state of described two CSTR high speed, each index.
10. two CSTR high speed stillness wattless occurrence apparatus according to claim 1, it is characterized in that, also comprise Background communication module, the interface of described Background communication module adopts standard communication interface, for providing the passage run with the connection of top level control device and parallel operation.
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| CN104967131A (en) * | 2015-05-27 | 2015-10-07 | 海特尔机电工程技术（马鞍山）有限公司 | SVG control module |
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