CN202633962U - Photovoltaic grid connected and electric energy quality comprehensive control apparatus based on TMS320F2812 - Google Patents
Photovoltaic grid connected and electric energy quality comprehensive control apparatus based on TMS320F2812 Download PDFInfo
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- CN202633962U CN202633962U CN2012200072716U CN201220007271U CN202633962U CN 202633962 U CN202633962 U CN 202633962U CN 2012200072716 U CN2012200072716 U CN 2012200072716U CN 201220007271 U CN201220007271 U CN 201220007271U CN 202633962 U CN202633962 U CN 202633962U
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- 238000000034 method Methods 0.000 claims description 4
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- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000005266 casting Methods 0.000 abstract 1
- 238000011217 control strategy Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
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- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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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
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- 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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- 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
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Abstract
Disclosed is a photovoltaic grid connected and electric energy quality comprehensive control apparatus based on TMS320F2812, belonging to the electric energy quality treatment and photovoltaic generating technology field. The apparatus of the utility model, applicable to the three-phase four-wire system power distribution network, mainly comprises a solar energy photovoltaic array, a reverse-preventing diode, a DC/AC converter, and a filtering inductance, with the TMS320F2812DSP control chip as the core to realize the control strategy. When the sunlight is sufficient, the apparatus simultaneously realizes the photovoltaic grid-connected power generation and electric energy quality comprehensive control. When the sunlight is insufficient or at night, the photovoltaic array is separated from the apparatus and the apparatus independently realizes the function of electric energy quality comprehensive control. The photovoltaic grid connected and electric energy quality comprehensive control apparatus based on TMS320F2812 of the utility model combines the photovoltaic grid-connected power generation and the electric energy quality comprehensive control together, thereby avoiding the unfavorable influence upon the power distribution network resulting from the frequent casting cutting of the grid-connected devices and fully utilizing the capacity of the grid-connected device. Therefore, the apparatus of the utility model helps raise the utilization rate and cost performance of the electric energy quality comprehensive control apparatus and realizes multifunction with one machine.
Description
Technical field
Patent of the present invention belongs to grid-connected photovoltaic system control technology field, and power quality controlling control technology field.
Background technology
The energy is development national economy and the important substance basis of uplifting the people's living standard.Because traditional fossil energy more and more closes on exhaustion, regenerative resource will progressively substitute fossil energy, become the energy of human kind sustainable development.In regenerative resource, with the largest potentiality is solar energy.Solar energy power generating is the important way that solar energy utilizes, have pollution-free, renewable, do not receive advantage such as region limits, also be the green energy resource that China's emphasis is advocated development and use.China's solar energy resources is quite abundant, and year solar radiation total amount in all parts of the country is 3340～8400MJ/m
2, total value is 58520MJ/m
2The annual solar radiant energy of accepting of China's top is about 147 * 108GWh, is equivalent to 4.9 trillion tons of standard coals.Add the clean environmental protection characteristic of solar energy, solar energy resources becomes the tool of China and large-scale develops and utilizes one of regenerative resource of value.
Along with improving constantly and the continuous development of power electronic technology of industrial automation level; DC/AC converter, rectifier, RHVC, impact, uncompensated load etc. constantly increase in the power distribution network, and these are non-linear all can to produce in various degree influence to these equipment itself and other to demanding device of the quality of power supply and equipment with the time variation load.A large amount of harmonic waves and order harmonic components have been injected in the switch motion of power electronic equipment in electrical network, cause the serious distortion of voltage and current in the AC network.Every electric equipment with nonlinear impedance characteristic all is the pollutant sources of the quality of power supply; Comprise power load, electric furnace arrangement for producing steel load, electric locomotive load of various power electronic equipments etc.; The capital produces problems such as voltage fluctuation and flicker, higher harmonic voltage in electrical network, thereby causes the distortion of voltage sinusoidal waveform.Natural phenomena also can influence the quality of power supply like thunderbolt, storm etc.Power quality index worsens the normal operation that has not only influenced electric power system and association area, and normal safe and reliable electricity consumption has also been caused certain threat.Along with the continuous progress of power electronic technology, electric energy regulator (UPQC) arises at the historic moment.Electric energy regulator (UPQC) can compensate jumping or the short time voltage interruption the when imbalance of bust, fluctuation and flickering, harmonic current and voltage, each phase voltage and fault etc. in the supply power voltage fast, is a kind of electric energy regulator with comprehensive function.
But present parallel network power generation device and UPQC respectively have deficiency; Because sunlight day and night changes, the work of parallel network power generation device diurnally, will cut off electrical network evening; This not only influences usage ratio of equipment, and when frequent switching, can impact the stabilization of power grids.UPQC can compensate idle and harmonic current, but because of cost higher, function singleness, it is bigger to promote difficulty.Analyzing UPQC and parallel network power generation can know; UPQC provides reactive energy and various harmonic wave to electrical network; And the parallel network power generation device only provides active energy; Both are just different to the electric energy that electrical network provides, and with controlling many similarities are arranged in structure, so can implement unified control to both in theory.In recent years, develop rapidly along with microelectronic, single-chip microcomputer and DSP that various performances are better, power consumption is lower continue to bring out.TMS320F2812 is a DSP control chip that Texas Instruments (TI) produces, and its characteristics have: 1. up to the operating frequency of 150MHz, and 32 hardware adder and multipliers; 2. Harvard's bus structures, interrupt response is handled rapidly; 3. the task manager module of 2 enhancings (comprising general purpose timer, comparing unit, capturing unit and quadrature coding pulse circuit) provides a whole set of to be used for the function and the characteristic of motion control and Electric Machine Control application; 4. ancillary equipment comprises 3 32 bit CPU timers, 12 analog-to-digital conversion modules of 16 passages, and the fastest change-over period of its streamline is 60ns, the fastest change-over period of single channel is 200ns, etc.The appearance of TMS320F2812 is for the realization of the unified control of parallel network power generation and UPQC provides hardware foundation.
The utility model content
The adverse effect of bringing to power distribution network for fear of the grid-connection device frequent switching; The capacity of grid-connection device is fully used; Improve the interest rate of power quality harnessed synthetically device and use and cost performance, it is a kind of based on the grid-connected of TMS320F2812 and power quality harnessed synthetically device that the utility model provides.This device is a core with the TMS320F2812DSP chip, can to the time realize improving the electrical network load current waveform, eliminate the function that the three-phase imbalance electric current is realized parallel network power generation simultaneously.
The technical scheme of the novel employing of this usefulness is following: a kind of based on the grid-connected of TMS320F2812 and power quality harnessed synthetically device, it mainly comprises: solar energy photovoltaic array, counnter attack diode, DC side storage capacitor, DC/AC converter, filter inductance, TMS320F2812DSP control chip and peripheral signal processing circuit, photoelectricity are isolated and drive circuit.It is characterized in that: the solar energy photovoltaic array provides direct current to capacitor through the counnter attack diode, also stablizes DC/AC converter dc voltage in order to store electrical energy; When sunshine on daytime is sufficient; Device is realized the function of parallel network power generation and power quality harnessed synthetically simultaneously; The direct current energy conversion that the DC/AC converter produces photovoltaic module; Through after the filter inductance electric current is injected electrical network, realize parallel network power generation simultaneously in order to the current waveform, the elimination three-phase imbalance electric current that improve the electrical network load; Under the situation at low sunshine or night, device cuts off photovoltaic array, counnter attack diode, and device is realized the function of power quality harnessed synthetically separately.
Said based on the grid-connected of TMS320F2812 and power quality harnessed synthetically device, DC/AC converter topology structure adopts the three-phase four-wire system mode, and single-phase main circuit structure is the full-bridge form.
Said based on the grid-connected of TMS320F2812 and power quality harnessed synthetically device, the high-frequency current harmonic wave of filter reactor in order to cause by the action of power electronic device high frequency in the filtering DC/AC converter output current wave.
Said based on the grid-connected of TMS320F2812 and power quality harnessed synthetically device; Control circuit is core with TMS320F2812DSP; Engagement tabs external signal modulate circuit is sampled to the voltage and current of three-phase distribution net, and calculates power distribution network three phase harmonic, reactive-current compensation value; This offset combines with the MPPT maximum power point tracking algorithm of solar energy photovoltaic array, obtains actual grid-connected current instruction; According to the grid-connected current instruction that obtains; The task manager inner by TMS320F2812 forms 12 road pwm pulse signals; Opening and turn-offing through the power electronic device in photoelectricity isolation and the drive circuit control DC/AC converter; Thereby the output current of control DC/AC converter, and the process filter inductance injects electrical network with electric current, the function of realization power quality harnessed synthetically and parallel network power generation.
The technique effect of the utility model is:
1. adopt TMS320F2812 as core; Realized unified control grid-connected and power quality harnessed synthetically; Can realize improving the current waveform of electrical network load, the function that elimination three-phase imbalance electric current is realized parallel network power generation simultaneously simultaneously, realize one-machine-multi-function, improve the cost performance of device.
2. avoid grid-connected frequent switching to the adverse effect that power distribution network brings, the capacity of grid-connecting apparatus under the situation of hanging down sunshine or night is effectively utilized, improved the utilance of device.
Description of drawings
Fig. 1 is based on the theory diagram of the grid-connected of TMS320F2812 and power quality harnessed synthetically device.
Fig. 2 is based on the schematic diagram of the grid-connected of TMS320F2812 and power quality harnessed synthetically device power quality controlling and grid-connected part.
Fig. 3 is based on the composite diagram of the grid-connected of TMS320F2812 and the instruction of power quality harnessed synthetically device grid-connected current.
Embodiment
Mainly constitute based on the grid-connected of TMS320F2812 and power quality harnessed synthetically device by solar energy photovoltaic array, counnter attack diode, capacitor, DC/AC converter, filter reactor, filtering capacitor, Industrial Frequency Transformer and TMS320F2812 and peripheral signal processing circuit thereof etc.Below in conjunction with accompanying drawing the utility model system is described further.
Fig. 1 is an embodiment sketch of the utility model, and solar battery array [1] adopts the polylith high-performance HIT of Sanyo battery strings to be formed in parallel, and it is a direct current energy with solar energy converting; In order to prevent that electric current from flowing into photovoltaic array, at the outlet side of the photovoltaic array counnter attack diode [2] of having connected, DC side storage capacitor [3] adopts electrolytic capacitor, and DC/AC converter [4] adopts the three-phase topological structure, and single-phase main circuit structure is the full-bridge form; Power electronic device adopts Mitsubishi's SPM (IPM), adopts noninductive resistance, noninductive electric capacity and fast recovery diode to constitute the buffer circuit of DC/AC converter.System controller is a core with TMS320F2812DSP control chip [6], and engagement tabs peripheral signal processing circuit [7] is to photovoltaic array output voltage u
PWith output current i
PThe A phase voltage u of power distribution network three-phase voltage
aAnd power distribution network three-phase current i
a, i
b, i
cMonitor; Output pulse width was modulated (PWM) signal after analytical calculation obtained the three-phase voltage current-order; Pwm signal through photoelectricity isolate with drive circuit [8] after control opening and turn-offing of power electronic device in the DC/AC converter; Thereby the output current of control DC/AC converter, and process filter inductance [5] injects electrical network with electric current, the function of realization power quality harnessed synthetically and parallel network power generation.
Claims (4)
1. one kind based on the grid-connected of TMS320F2812 and power quality harnessed synthetically device, and it mainly comprises:
Solar battery array [1], counnter attack diode [2], DC side storage capacitor [3], DC/AC converter [4], filter inductance [5], TMS320F2812 DSP control chip [6] and peripheral signal processing circuit [7], photoelectricity are isolated and drive circuit [8]; It is characterized in that: solar battery array [1] provides DC side storage capacitor [3] through counnter attack diode [2], also stablizes DC/AC converter [4] dc voltage in order to store electrical energy; When sunshine on daytime was sufficient, DC/AC converter [4] injected electrical network with alternating current with the direct current energy conversion that photovoltaic module produces through filter inductance [5] afterwards, realizes the function of parallel network power generation and power quality harnessed synthetically simultaneously; Under the situation at low sunshine or night, device cuts off solar battery array [1], counnter attack diode [2], and device is realized the function of power quality harnessed synthetically separately.
2. said based on the grid-connected of TMS320F2812 and power quality harnessed synthetically device according to claim 1, it is characterized in that: DC/AC converter [4] topological structure adopts the three-phase four-wire system mode, and single-phase main circuit structure is the full-bridge form.
3. said based on the grid-connected of TMS320F2812 and power quality harnessed synthetically device with 2 according to claim 1, it is characterized in that: the high-frequency current harmonic wave of filter inductance [5] in order to cause by the action of power electronic device high frequency in filtering DC/AC converter [4] output current wave.
4. said based on the grid-connected of TMS320F2812 and power quality harnessed synthetically device according to claim 1; Control circuit is a core with TMS320F2812 DSP control chip [6]; Engagement tabs external signal modulate circuit [7] is sampled to the voltage and current of three-phase distribution net, and calculates power distribution network three phase harmonic, reactive-current compensation value; This offset combines with the MPPT maximum power point tracking algorithm of solar energy photovoltaic array, obtains actual grid-connected current instruction; According to the grid-connected current instruction that obtains; The task manager inner by TMS320F2812 forms 12 road pwm pulse signals; Opening and turn-offing through the power electronic device in photoelectricity isolation and drive circuit [8] the back control DC/AC converter; And process filter inductance [5] injects electrical network with electric current, the function of realization power quality harnessed synthetically and parallel network power generation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200072716U CN202633962U (en) | 2012-01-06 | 2012-01-06 | Photovoltaic grid connected and electric energy quality comprehensive control apparatus based on TMS320F2812 |
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| CN2012200072716U CN202633962U (en) | 2012-01-06 | 2012-01-06 | Photovoltaic grid connected and electric energy quality comprehensive control apparatus based on TMS320F2812 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281368A (en) * | 2015-11-12 | 2016-01-27 | 中国能源建设集团江苏省电力设计院有限公司 | Photovoltaic grid-connected and electric energy quality management unified control strategy |
| CN106340900A (en) * | 2016-09-26 | 2017-01-18 | 国网上海市电力公司 | Distributed energy grid-connected and reactive power compensation compound control system |
| CN106786585A (en) * | 2017-01-03 | 2017-05-31 | 国网安徽省电力公司电力科学研究院 | Based on the autonomous photovoltaic poverty alleviation rural power grids electric energy quality optimizing device and method of collaboration |
| US20220069734A1 (en) * | 2019-08-06 | 2022-03-03 | Toshiba Mitsubish-Electric Industrial Systems Corporation | Power conversion system |
-
2012
- 2012-01-06 CN CN2012200072716U patent/CN202633962U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281368A (en) * | 2015-11-12 | 2016-01-27 | 中国能源建设集团江苏省电力设计院有限公司 | Photovoltaic grid-connected and electric energy quality management unified control strategy |
| CN106340900A (en) * | 2016-09-26 | 2017-01-18 | 国网上海市电力公司 | Distributed energy grid-connected and reactive power compensation compound control system |
| CN106786585A (en) * | 2017-01-03 | 2017-05-31 | 国网安徽省电力公司电力科学研究院 | Based on the autonomous photovoltaic poverty alleviation rural power grids electric energy quality optimizing device and method of collaboration |
| US20220069734A1 (en) * | 2019-08-06 | 2022-03-03 | Toshiba Mitsubish-Electric Industrial Systems Corporation | Power conversion system |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20140106 |