CN202333813U - Multifunctional electric energy quality regulator based on voltage type inverter - Google Patents
Multifunctional electric energy quality regulator based on voltage type inverter Download PDFInfo
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- CN202333813U CN202333813U CN2011204407659U CN201120440765U CN202333813U CN 202333813 U CN202333813 U CN 202333813U CN 2011204407659 U CN2011204407659 U CN 2011204407659U CN 201120440765 U CN201120440765 U CN 201120440765U CN 202333813 U CN202333813 U CN 202333813U
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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
Abstract
The utility model discloses a multifunctional electric energy quality regulator based on a voltage type inverter. The regulator consists of a main circuit and a control circuit, wherein the main circuit consists of a three-phase rectifier bridge, an inverter power module, an output filter and an isolation transformer; and the control circuit consists of a sampling circuit, a digital signal processor (DSP) controller, a photoelectric isolation input/output circuit and an industrial control computer. The multifunctional electric energy quality regulator based on the voltage type inverter has the advantages that: the operating time of a reactive compensation device can be greatly prolonged, the operating efficiency of the reactive compensation device can be greatly improved, maintenance work load is reduced, dynamic and quick regulation effects of the device can be completely achieved, the reactive and voltage regulation capacity of a central point is improved, reactive balance and voltage stabilization of a regional power grid are quickly realized, and the levels of modernization and automation of the power grid are improved.
Description
Technical field
The utility model relates to a kind of electric energy regulator, particularly a kind of multifunctional electric energy quality adjustor based on voltage source inverter.
Background technology
Along with the development of power electronic technology, non-linear power electronic device has obtained extensive use with installing in the industry in modern times.The operation of these equipment makes in the electrical network voltage and current wave distortion more and more serious, and harmonic pollution is serious day by day.In addition; Impact, fluctuation load; For example arc furnace, heavy (merchant) mill, electric locomotives etc. in servicely not only can produce a large amount of high order harmonic components, but also can produce voltage fluctuation, fall, power quality problem such as three-phase imbalance, power failure; The alternating current of electrical network output is not stable sine wave, and power supply quality is constantly worsened.On the other hand, along with various complicacies, accurate, the responsive power consumption equipment of the quality of power supply is constantly popularized, people require increasingly highly to the quality of power supply, thereby the quality of power supply becomes the focus of present research.
Improve the main means of the quality of power supply at present; Like passive filter, contact switch or thyristor switchable capacitor, static passive compensation device; And uninterruption power source (UPS) etc., be not to be the most effectual way that solves power quality problem. can't satisfy people to requirements at the higher level that the quality of power supply proposed.People such as L.Gyugyi in 1976 utilize by pulse-width modulation (PWM) current transformer formation Active Power Filter-APF (APF) and static reacance generator (DSTATCOM) based on high power transistor and eliminate mains by harmonics, improve quality of voltage, compensating power, improve laod unbalance etc.After this, along with the develop rapidly of power electronic technology and PWM technology. and to the further investigation of reactive power theory under the nonsinusoidal condition. the instantaneous reactive power theory that people such as particularly Japanese scholar H.Akagi propose. make APF and DSTATCOM developed rapidly and perfect. and begin to turn to the commercial Application stage gradually by experimental stage.The described multifunctional electric energy quality adjustor of this claim can be realized power factor and functions such as load voltage adjusting and filtering mains by harmonics simultaneously.
The utility model content
The purpose of the utility model provides a kind of multifunctional electric energy quality adjustor based on voltage source inverter.This electric energy regulator is simple in structure, and can realize power factor and functions such as load voltage adjusting and filtering mains by harmonics simultaneously.
The technical scheme that the utility model solves the problems of the technologies described above is:
Based on the multifunctional electric energy quality adjustor of voltage source inverter, form by main circuit and control circuit.Main circuit is made up of three-phase commutation bridge, inverter power module, output filter, isolating transformer.Control circuit isolates imput output circuit by sample circuit, dsp controller, photoelectricity and industrial control computer is formed;
1) structure of each parts
Output filter is made up of inductance and electric capacity; Dsp controller is provided with I, II, three ports of III, and the I port of dsp controller is the I/O input/output port; The II port is a sampling module; The III port is a communication module;
2) annexation of each parts
One end of three-phase commutation bridge links to each other with electrical network; The other end connects the inverter power module that voltage supports capacitor C; The output of inverter power module is connected with an end of output filter, and the other end of output filter connects the former limit of isolating transformer, and the secondary of isolating transformer gets access to grid;
The II of the output termination dsp controller of sample circuit, the I of dsp controller isolates imput output circuit with photoelectricity and links to each other through optical fiber, and the output that photoelectricity is isolated imput output circuit is connected with inverter power module; The III of dsp controller is connected through the RS232 serial ports with industrial control computer;
Above-mentioned inverter power module adopts the FF450R17ME3 module of infineon (Infineon).
The turn ratio of the former secondary of above-mentioned isolating transformer is 1: 2.
The above-mentioned dsp controller module of stating adopts closes the DPS2812M controller that the crowd reaches company.
The above-mentioned sample circuit of stating adopts two AD7656 chips, 16 of precision.
The beneficial effect of the utility model is:
1) at aspects such as the transient stability that improves system, damping system vibrations, the performance of multifunctional electric energy quality adjustor is superior to traditional synchronous compensator greatly;
2) adopt digital control technology, system reliability is high, does not need basically to safeguard, can save a large amount of maintenance costs; Simultaneously, can realize reactive power flow and voltage optimal control through the EMS of control centre, be the part of the digital power system (DPS) in building;
3) control is flexibly, adjustable range is wide, equal quick adjustment continuously under perception and operation at leading power factor operating mode, and response speed can reach Millisecond.
4) static operation, safety and stability does not have the such large-scale rotating machinery of compensator, does not have wearing and tearing, does not have mechanical noise, will improve device lifetime greatly, improves environmental impact.
5) the PWM ripple of inverter power module output is after output filter filtering; Waveform can meet the demands; Be to export behind 1: 2 the isolating transformer through no-load voltage ratio, the dc voltage of inverter power module can be suitable for the reactive power compensation under the voltage levels condition in the higher position very much like this.
In sum; The utility model can improve the running time and the efficient of reactive power compensator greatly; Reduce maintenance workload, can give full play to device dynamically, regulating action fast, strengthen the idle and regulating and controlling voltage ability of backbone point; Impel area power grid to realize that rapidly reactive balance and voltage are stable, improve the modernization and the automatization level of electrical network.
Description of drawings
Fig. 1 is the structural representation based on the multifunctional electric energy quality adjustor of voltage source inverter of the utility model.
Among the figure: three-phase commutation bridge 1, inverter power module 2, output filter 3, isolating transformer 4, sample circuit 5, dsp controller 6, photoelectricity are isolated imput output circuit 7, industrial control computer 8, main circuit 9 and control circuit 10.
Fig. 2 is the dsp controller sketch map of the utility model.
Among the figure: zero passage is measured module 6-1, sampling module 6-2, filtration module 6-3, fault detection module 6-4, communication module 6-5.
Embodiment
The structure based on the multifunctional electric energy quality adjustor of voltage source inverter of the utility model is as shown in Figure 1, and the described multifunctional electric energy quality adjustor based on voltage source inverter of the utility model is made up of main circuit 9 and control circuit 10.Main circuit 9 is made up of three-phase commutation bridge 1, inverter power module 2, output filter 3, isolating transformer 4 etc.Three-phase commutation bridge, inverter power module, output filter, isolating transformer are connected in series successively.Control circuit 10 comprises sample circuit 5, dsp controller 6, photoelectricity isolation imput output circuit 7 and industrial control computer 8.
In the control circuit 10, the three-phase current of electrical network, voltage signal are input to dsp controller 6 after sample circuit 5 is gathered.The data of 6 pairs of collections of dsp controller are carried out computing, output PWM control impuls, and the PWM control impuls is isolated the control end that imput output circuit 7 is delivered to inverter power module 2 through photoelectricity.Industrial control computer 8 carries out communication through RS232 interface and dsp controller 6, is used for three-phase current, the voltage signal of electrical network are shown in real time, and has the inquiry of historical data and fault data query function.
The dsp controller structure of the utility model is as shown in Figure 2, and dsp controller 6 comprises zero passage mensuration module 6-1, sampling module 6-2, filtration module 6-3, fault detection module 6-4 and communication module 6-5.
The main effect that zero passage is measured module 6-1 is the sampling that realizes the synchronizing signal zero crossing.In order to guarantee output voltage and system synchronization, must measure the initial signal of the zero crossing of line voltage as sampling based on the multifunctional electric energy quality adjustor of voltage source inverter.The capturing unit of DSP task manager can be caught the skip signal (signal rising edge or trailing edge) on its input pin, thereby it is more much easier than single-chip microcomputer to make that catching of zero crossing implements.
The effect of sampling module 6-2 is the interchange real-time sampling of realizing electric network data.According to PWM ripple calculation requirement, the sampling period is decided to be 156us, and frequency is 128 times of power frequency, and carrier frequency can arrive 128 * 50=6400Hz like this, and carrier frequency height like this can reduce the harmonic components of output.
Filtration module 6-3 adopts the HF noise signal of onrecurrent type digital filter filtering sampling.Need the operand of completion bigger in this functional module.Onrecurrent type digital filter be with the response of the unit impulse of input signal and filter do convolution with and one type of filter realizing, it can filter out the various compositions that the signal intermediate frequency rate is the fundamental frequency integral multiple fully.
Fault detection module 6-4 realizes fault detect and the protection based on the multifunctional electric energy quality adjustor of voltage source inverter.When fault such as overcurrent, overvoltage, overheated, short circuit took place as the IGBT of inverter power module, the IGBT drive element of the grid will cut-off current and is exported a fault-signal (FO).After fault detection module detects this signal, produce interrupt signal PDPINT at once, forbid that DSP continues to send the PWM ripple.
Communication module 6-5 is used for accomplishing the communication between dsp controller and the industrial control computer.Swap data (sampled data, reactive power, fault-signal etc.), these functions pass through the programming of the port of DSP is realized.Industrial control computer carries out communication through RS232 interface and dsp controller, is used for three-phase current, the voltage signal of electrical network are shown in real time, and has the inquiry of historical data and fault data query function.
Claims (5)
1. based on the multifunctional electric energy quality adjustor of voltage source inverter, it is characterized in that this adjuster is made up of main circuit and control circuit; Main circuit is made up of three-phase commutation bridge, inverter power module, output filter, isolating transformer; Control circuit isolates imput output circuit by sample circuit, dsp controller, photoelectricity and industrial control computer is formed;
1) structure of each parts
Output filter is made up of inductance and electric capacity; Dsp controller (6) is provided with I, II, three ports of III, and the I port of dsp controller is the I/O input/output port; The II port is a sampling module; The III port is a communication module;
2) annexation of each parts
One end of three-phase commutation bridge links to each other with electrical network; The other end connects the inverter power module that voltage supports capacitor C; The output of inverter power module is connected with an end of output filter, and the other end of output filter connects the former limit of isolating transformer, and the secondary of isolating transformer gets access to grid;
The II port of the output termination dsp controller of sample circuit, the I port of dsp controller is isolated imput output circuit with photoelectricity and is linked to each other through optical fiber, and the output that photoelectricity is isolated imput output circuit is connected with inverter power module; The III port of dsp controller is connected through the RS232 serial ports with industrial control computer.
2. the multifunctional electric energy quality adjustor based on voltage source inverter according to claim 1 is characterized in that: described inverter power module adopts the FF450R17ME3 module of infineon.
3. the multifunctional electric energy quality adjustor based on voltage source inverter according to claim 1 is characterized in that: the turn ratio of the former secondary of said isolating transformer is 1: 2.
4. the multifunctional electric energy quality adjustor based on voltage source inverter according to claim 1 is characterized in that: described dsp controller module adopts closes the DPS2812M controller that the crowd reaches company.
5. the multifunctional electric energy quality adjustor based on voltage source inverter according to claim 1 is characterized in that: said sample circuit adopts two AD7656 chips, 16 of precision.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204407659U CN202333813U (en) | 2011-11-09 | 2011-11-09 | Multifunctional electric energy quality regulator based on voltage type inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204407659U CN202333813U (en) | 2011-11-09 | 2011-11-09 | Multifunctional electric energy quality regulator based on voltage type inverter |
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| CN202333813U true CN202333813U (en) | 2012-07-11 |
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| CN2011204407659U Expired - Fee Related CN202333813U (en) | 2011-11-09 | 2011-11-09 | Multifunctional electric energy quality regulator based on voltage type inverter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872925A (en) * | 2014-03-12 | 2014-06-18 | 西安交通大学 | Mining explosive-proof type single-phase voltage-stabilizing voltage transformation device and method |
| CN104052083A (en) * | 2014-06-27 | 2014-09-17 | 扬州大学 | Grid connection inverter hybrid modulating device and method |
| CN109193655A (en) * | 2018-08-08 | 2019-01-11 | 中冶京诚工程技术有限公司 | A kind of ac arc furnace flexible power supply equipment |
| CN109672172A (en) * | 2018-12-13 | 2019-04-23 | 中冶京诚工程技术有限公司 | Electric arc furnaces power supply unit and electric arc furnaces method of supplying power to |
| CN112072976A (en) * | 2020-07-23 | 2020-12-11 | 中国电力科学研究院有限公司 | Q-axis excitation control device of double-shaft excitation phase modulator |
-
2011
- 2011-11-09 CN CN2011204407659U patent/CN202333813U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872925A (en) * | 2014-03-12 | 2014-06-18 | 西安交通大学 | Mining explosive-proof type single-phase voltage-stabilizing voltage transformation device and method |
| CN104052083A (en) * | 2014-06-27 | 2014-09-17 | 扬州大学 | Grid connection inverter hybrid modulating device and method |
| CN109193655A (en) * | 2018-08-08 | 2019-01-11 | 中冶京诚工程技术有限公司 | A kind of ac arc furnace flexible power supply equipment |
| CN109193655B (en) * | 2018-08-08 | 2021-08-20 | 中冶京诚工程技术有限公司 | Flexible power supply equipment for alternating current electric arc furnace |
| CN109672172A (en) * | 2018-12-13 | 2019-04-23 | 中冶京诚工程技术有限公司 | Electric arc furnaces power supply unit and electric arc furnaces method of supplying power to |
| CN109672172B (en) * | 2018-12-13 | 2021-06-15 | 中冶京诚工程技术有限公司 | Method for supplying power to a power supply device of an arc furnace |
| CN112072976A (en) * | 2020-07-23 | 2020-12-11 | 中国电力科学研究院有限公司 | Q-axis excitation control device of double-shaft excitation phase modulator |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20121109 |