CN101237150A - Integrated device of efficient light voltage parallel network and mixed active power filter - Google Patents
Integrated device of efficient light voltage parallel network and mixed active power filter Download PDFInfo
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- CN101237150A CN101237150A CNA200810026544XA CN200810026544A CN101237150A CN 101237150 A CN101237150 A CN 101237150A CN A200810026544X A CNA200810026544X A CN A200810026544XA CN 200810026544 A CN200810026544 A CN 200810026544A CN 101237150 A CN101237150 A CN 101237150A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses an integrated device of high efficiency photovoltaic grid-connection and hybrid active power filter, belonging to the technical fields of the electrical engineering and the solar photovoltaic utilization. The integrated device is basically characterized in that: through utilizing solar battery array, the device absorbs sunshine energy and converts the sunshine energy into electric energy, then changes the electric energy into alternating current through a power converter, and the alternating current is transferred to a power network through a passive power filter formed by inductance and capacitance after filtered by a low pass filter. The passive power filter and a photovoltaic grid-connection inverter are connected in series, the passive power filter bears primary fundamental voltage, the voltage of the direct current side of the photovoltaic grid-connection inverter is very low, thus a photovoltaic array can be directly connected with the photovoltaic grid-connection inverter without a boosted circuit, the generating efficiency of the photovoltaic grid-connection is improved. In addition, the integrated device of high efficiency photovoltaic grid-connection and hybrid active power filter also has the functions of an active power filter at the same time, makes the power network carry out reactive power compensation and controls the harmonic of the power network, reduces the power network loss and improves the quality of power supply. The integrated device of high efficiency photovoltaic grid-connection and hybrid active power filter has the advantages of simple structure, high efficiency and multi-function.
Description
Technical field
The present invention is combined as a whole efficient light voltage parallel network and hybrid active electric filter, belongs to the field of electrical engineering and solar energy photovoltaic utilization.
Background technology
The energy is development national economy and the important substance basis of uplifting the people's living standard.Because world energy sources, traditional fossil energy more and more closes on exhaustion, ensures the energy and environment sustainable development, and the supply that particularly guarantees primary energy is the great strategic issue that China faces.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, be not subjected to 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/m2, and intermediate value is 58520MJ/m2.The 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.
Photovoltaic parallel in system is the important form of solar energy photovoltaic utilization, accounts for more than 70% of photovoltaic system application.Owing to the cost height of solar-energy photo-voltaic cell, cost an arm and a leg, the efficient of photovoltaic parallel in system becomes influences the key factor that it is applied.When photovoltaic parallel in system is applied to the high voltage AC network, because the output voltage of solar-energy photo-voltaic cell is lower, need usually to adopt booster circuit, the power loss of bringing has thus reduced the efficient of whole photovoltaic parallel in system.In addition, because solar energy has very strong time response, intensity is very weak sunshine when evening and rainy weather, and photovoltaic parallel in system can not get good utilization usually in these times.
On the other hand, along with the develop rapidly of electronic technology and improving constantly of people's living standard, adopt the household electrical appliance and the office equipment of various power electronic equipments to be able to extensive use, cause a series of power quality problems such as mains by harmonics, flickering, three-phase are unbalanced, instant electricity loss, the safe and stable operation of electrical network is constituted a serious threat.The great electric power accident that the global range internal cause quality of power supply causes over nearly 20 years reaches more than 20, annual pollutes the national economy loss that causes up to 30,000,000,000 dollars because of electrical energy power quality disturbance and electric circumstance.Power quality problem becomes the significant problem that influences national economy.In order to suppress mains by harmonics, improve grid supply quality, traditional method is to adopt passive power filter, utilize the resonance characteristic of inductance and electric capacity to form trapper to particular harmonic, but there are some intrinsic defectives in passive power filter, big as volume, as can only to suppress fixed frequency harmonic current, easily and electric network impedance generation series parallel resonance etc.Active Power Filter-APF can well overcome the shortcoming of passive power filter, and capacity is big, shortcoming such as cost an arm and a leg and the Active Power Filter-APF that uses separately exists.Mixed active electric power filter combines passive power filter and Active Power Filter-APF, adopt passive power filter to bear main reactive power compensation and harmonic wave suppresses task, make Active Power Filter-APF only bear low-voltage, its capacity is also little a lot.It has the advantage of the with low cost and Active Power Filter-APF superior performance of passive power filter concurrently, becomes the main flow direction of Active Power Filter-APF development.
Because the time-varying characteristics of electrical network nonlinear load, sometimes idle and harmonic load weighs, the load current distortion is very serious, at this time hybrid active electric filter is exported powerful idle and harmonic current it is compensated, its capacity has obtained utilizing preferably, but the idle and harmonic wave duty ratio at electrical network in some cases is lighter, and the power output of hybrid active electric filter is very little, and its utilance is very low even idle.
Efficient light voltage parallel network and hybrid active electric filter integrated apparatus combine photovoltaic grid-connected device and hybrid active electric filter, utilize the low characteristics of inverter output voltage of hybrid active electric filter, make photovoltaic parallel in system need not booster circuit and can be applied to high-voltage electric power system, improve the efficient of photovoltaic parallel in system.Utilize photovoltaic parallel in system and hybrid active electric filter complementary characteristic in time simultaneously, improve the utilance of device.
Summary of the invention
Efficient and utilance in order to improve photovoltaic parallel in system combine photovoltaic parallel in system with hybrid active electric filter.Hybrid active electric filter adopts passive power filter and Active Power Filter-APF series connection back and links the version of electrical network.The solar energy photovoltaic array links to each other with the DC side of hybrid active filter by the counnter attack diode, the solar energy photovoltaic array absorbs the energy at sunshine, be converted to electric energy and be transformed into alternating current by inverter, by low pass filter filtering after the passive power filter that inductance and electric capacity constitute is given electrical network with power delivery.Because passive power filter adopts the form of connecting with photovoltaic combining inverter, passive power filter is born main fundamental voltage, the voltage of photovoltaic combining inverter DC side is very low, therefore photovoltaic array can directly be connected with combining inverter and not need boost conversion circuit, has improved the efficient of parallel network power generation.In addition, efficient light voltage parallel network and hybrid active electric filter integrated apparatus can play the effect of hybrid active electric filter simultaneously, export idle and harmonic current, electric network reactive-load is compensated and suppresses mains by harmonics, reduce grid loss and also improve the quality of power supply.
The technical solution adopted in the present invention is as follows:
A kind of efficient light voltage parallel network and hybrid active electric filter integrated apparatus mainly comprise solar energy photovoltaic array, counnter attack diode, capacitor, inverter, filter reactor, filtering capacitor, passive power filter etc.It is characterized in that: utilize solar battery array to absorb the energy at sunshine, be converted to electric energy and be transformed into alternating current by power converter, by low pass filter filtering after the passive power filter that inductance and electric capacity constitute is given electrical network with power delivery.Because passive power filter adopts the form of connecting with photovoltaic combining inverter, passive power filter is born main fundamental voltage, the voltage of photovoltaic combining inverter DC side is very low, therefore photovoltaic array can directly be connected with combining inverter and not need boost conversion circuit, has improved the efficient of parallel network power generation.This device can also play the effect of hybrid active electric filter, at intensity of sunshine more weak or all the time according to situation under, the required idle and harmonic compensation current of inverter output electrical network, after the low pass filter filtering of filter inductance and filter capacitor formation, by passive power filter electric network reactive-load and harmonic wave are compensated, improve the quality of power supply and reduce grid loss.
Efficient light voltage parallel network and hybrid active electric filter integrated apparatus inverter when realizing the efficient light voltage parallel network function is exported the alternating current with the electrical network same frequency, referring to Fig. 3, the amplitude by regulating alternating current and come the photovoltaic generation power and the electric network reactive compensation power of control device with the phase difference of electrical network.When efficient light voltage parallel network and hybrid active electric filter integrated apparatus were operated in the harmonic wave holddown, its inverter was output as the alternating current component stack summation with the each harmonic same frequency, referring to Fig. 4.When efficient light voltage parallel network and hybrid active electric filter integrated apparatus not only be operated in the efficient light voltage parallel network state but also compensation network is idle and when suppressing harmonic wave, its inverter is exported the alternating current with electrical network same frequency and each harmonic component same frequency simultaneously.
As one embodiment of the present invention, shunt transformer carries out electrical isolation and voltage and current parameter coupling on described filtering capacitor.
As one embodiment of the present invention, save described filtering capacitor, only adopt reactor to carry out filtering.
Technique effect of the present invention is:
1. the inverter that utilizes hybrid active electric filter with the solar energy converting of photovoltaic array output for and the alternating current of electrical network same frequency, give load and electrical network by passive power filter with energy delivery after the filtering.Because inverter output voltage is lower, so need not step-up transformer between photovoltaic array and the inverter, therefore can improve the efficient of photovoltaic parallel in system.
2. efficient light voltage parallel network and hybrid active electric filter integrated apparatus also have the effect of hybrid active electric filter concurrently, and it is idle to suppress mains by harmonics and compensation network, thereby improves the quality of power supply, reduce grid loss.
3. the hybrid active electric filter of efficient light voltage parallel network and hybrid active electric filter integrated apparatus and grid-connected having complementary functions, when intensity of sunshine is more weak based on the hybrid active filter function, at sunshine when strong based on grid-connected function, two kinds of functions complement each other, and have improved the utilance of device.
Description of drawings
Fig. 1 is the structure diagram of efficient light voltage parallel network and hybrid active electric filter integrated apparatus.
Fig. 2 is an embodiment of efficient light voltage parallel network and hybrid active electric filter integrated apparatus.
Fig. 3 is the efficient light voltage parallel network of band shunt transformer and the structure diagram of hybrid active electric filter integrated apparatus.
Fig. 4 is the parallel network power generation schematic diagram of efficient light voltage parallel network and hybrid active electric filter integrated apparatus.
Fig. 5 is the harmonic compensation schematic diagram of efficient light voltage parallel network and hybrid active electric filter integrated apparatus.
Fig. 6 is load current waveform figure
Fig. 7 is the mains supply current waveform figure
Embodiment
Efficient light voltage parallel network and hybrid active electric filter integrated apparatus mainly are made of solar energy photovoltaic array, counnter attack diode, capacitor, inverter, filter reactor, filtering capacitor, passive power filter etc.Demand according to different has numerous embodiments, below in conjunction with drawings and Examples system of the present invention is described further.
Embodiment 1:
Fig. 2 is one embodiment of the present of invention sketches, 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, capacitor [3] adopts electrolytic capacitor, inverter [4] adopts the full-bridge inverter structure, power electronic device adopts Mitsubishi's Intelligent Power Module (IPM), adopt noninductive resistance, noninductive electric capacity and fast recovery diode to constitute the buffer circuit of inverter, the output of inverter connects the low pass filter of inductance [5] and electric capacity [6] formation.Passive power filter [7] adopts 5 single tuned filters and 7 single tuned filters to be formed in parallel.System controller is core with DSP, photovoltaic array output voltage uP and output current iP, inverter output are monitored in real time through filtered voltage uO and current i O, load voltage uL and current i L, output pulse width modulation (PWM) signal after the analytical calculation, pwm signal the opening and turn-offing of the power electronic device in the control inverter after the photoelectricity isolation drive, thereby the output voltage of control inverter and electric current reach that parallel network power generation, harmonic wave suppress and the purpose of reactive power compensation.Fig. 6 and Fig. 7 are respectively the load current in this embodiment and the oscillogram of mains supply electric current.
Embodiment 2:
Compare with embodiment 1, difference is that going up shunt transformer at described filtering capacitor [6] carries out electrical isolation and voltage and current parameter coupling.
Embodiment 3:
Compare with embodiment 1, difference is to save described filtering capacitor [6], only adopts reactor to carry out filtering.
Embodiment 4:
Compare with embodiment 2, difference is to save described filtering capacitor [6], only adopts reactor to carry out filtering.
Claims (3)
1, efficient light voltage parallel network and hybrid active electric filter integrated apparatus, it is characterized in that: it comprises:
One solar energy photovoltaic array [1] provides direct current to capacitor [3] and inverter [4] by counnter attack diode [2];
One capacitor [3] in order to store electrical energy, is stablized inverter [4] dc voltage;
One inverter [4] is converted to alternating current with direct current, and wherein a part converts the sinusoidal ac with the electrical network same frequency to, and the energy feeding that photovoltaic array is provided is to electrical network [8], and another part changes required fundamental wave reactive power of electrical network and harmonic wave into;
One filter reactor [5] constitutes low pass filter jointly with filtering capacitor [6], the high-frequency harmonic that the action of power electronic device high frequency causes in the filtering inverter.
One passive power filter [7] adopts inductance, electric capacity or resistance to constitute, and bears most fundamental voltage.
2, efficient light voltage parallel network according to claim 1 and hybrid active electric filter integrated apparatus are at filtering capacitor [6] shunt transformer.
3, according to claim 1 and described efficient light voltage parallel network of claim 2 and hybrid active electric filter integrated apparatus, save filtering capacitor [6].
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| CNA200810026544XA CN101237150A (en) | 2008-02-29 | 2008-02-29 | Integrated device of efficient light voltage parallel network and mixed active power filter |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101877548A (en) * | 2009-04-28 | 2010-11-03 | 新疆新能源股份有限公司 | Three-phase four-leg inverter used for photovoltaic grid-connected power generation and photovoltaic grid-connected power generation system |
| CN101986501A (en) * | 2010-10-14 | 2011-03-16 | 国网电力科学研究院 | Supercapacitor-based photovoltaic grid-connected inverter |
| CN101697418B (en) * | 2009-10-23 | 2011-11-30 | 湖南大学 | Photovoltaic inversion grid-connection and harmonic suppression hybrid system for micro grid and composite control method thereof |
| CN102379080A (en) * | 2009-04-08 | 2012-03-14 | 施耐德东芝换流器欧洲公司 | System for controlling an electric charge powered by DC sources |
| CN102638045A (en) * | 2011-02-12 | 2012-08-15 | 中国人民解放军总后勤部建筑工程研究所 | Modular parallel inverting system with loading self-adapting function and control method thereof |
| CN103117553A (en) * | 2012-09-17 | 2013-05-22 | 湖南工业大学 | Novel power quality regulator on background of micro-grid |
| CN103532412A (en) * | 2012-07-05 | 2014-01-22 | 台达电子工业股份有限公司 | Feedback control circuit of power converter, and power converter system |
| CN103560577A (en) * | 2013-11-18 | 2014-02-05 | 国家电网公司 | Optimizing configuration system of novel photovoltaic VRB energy storage hybrid system |
| CN103746380A (en) * | 2013-12-27 | 2014-04-23 | 华中科技大学 | Passive power filter |
| CN104124859A (en) * | 2014-07-01 | 2014-10-29 | 特变电工新疆新能源股份有限公司 | Grid-connected current harmonic suppression circuit and method for photovoltaic grid-connected inverter |
| CN104617912A (en) * | 2015-01-07 | 2015-05-13 | 胡文杰 | Filtering system on direct-current or alternating-current signal transmission circuit |
| CN105119317A (en) * | 2015-10-24 | 2015-12-02 | 河南行知专利服务有限公司 | Method utilizing PV power generation device for compensation |
| CN106058931A (en) * | 2016-07-11 | 2016-10-26 | 太原理工大学 | Photovoltaic grid-connected inverter comprising electric energy quality processing, and control method thereof |
| CN106208134A (en) * | 2016-07-29 | 2016-12-07 | 常熟理工学院 | Grid-connected topology based on three-phase CLC immittance converter and Poewr control method |
| CN106532761A (en) * | 2015-09-11 | 2017-03-22 | 沈阳兴东控制技术有限公司 | Multimodal photovoltaic grid-connected inverter |
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2008
- 2008-02-29 CN CNA200810026544XA patent/CN101237150A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102379080A (en) * | 2009-04-08 | 2012-03-14 | 施耐德东芝换流器欧洲公司 | System for controlling an electric charge powered by DC sources |
| CN101877548A (en) * | 2009-04-28 | 2010-11-03 | 新疆新能源股份有限公司 | Three-phase four-leg inverter used for photovoltaic grid-connected power generation and photovoltaic grid-connected power generation system |
| CN101877548B (en) * | 2009-04-28 | 2015-07-29 | 新疆新能源股份有限公司 | For three-phase four-leg inverter and the grid-connected photovoltaic system of parallel network power generation |
| CN101697418B (en) * | 2009-10-23 | 2011-11-30 | 湖南大学 | Photovoltaic inversion grid-connection and harmonic suppression hybrid system for micro grid and composite control method thereof |
| CN101986501A (en) * | 2010-10-14 | 2011-03-16 | 国网电力科学研究院 | Supercapacitor-based photovoltaic grid-connected inverter |
| CN102638045B (en) * | 2011-02-12 | 2014-11-19 | 中国人民解放军总后勤部建筑工程研究所 | Modular parallel inverting system with loading self-adapting function and control method thereof |
| CN102638045A (en) * | 2011-02-12 | 2012-08-15 | 中国人民解放军总后勤部建筑工程研究所 | Modular parallel inverting system with loading self-adapting function and control method thereof |
| CN103532412A (en) * | 2012-07-05 | 2014-01-22 | 台达电子工业股份有限公司 | Feedback control circuit of power converter, and power converter system |
| CN103117553A (en) * | 2012-09-17 | 2013-05-22 | 湖南工业大学 | Novel power quality regulator on background of micro-grid |
| CN103560577A (en) * | 2013-11-18 | 2014-02-05 | 国家电网公司 | Optimizing configuration system of novel photovoltaic VRB energy storage hybrid system |
| CN103560577B (en) * | 2013-11-18 | 2016-02-10 | 国家电网公司 | A kind of Optimizing Configuration System of novel photovoltaic VRB energy storage hybrid system |
| CN103746380A (en) * | 2013-12-27 | 2014-04-23 | 华中科技大学 | Passive power filter |
| CN104124859A (en) * | 2014-07-01 | 2014-10-29 | 特变电工新疆新能源股份有限公司 | Grid-connected current harmonic suppression circuit and method for photovoltaic grid-connected inverter |
| CN104124859B (en) * | 2014-07-01 | 2016-08-17 | 特变电工新疆新能源股份有限公司 | A kind of photovoltaic combining inverter grid-connected current harmonic suppression circuit and method |
| CN104617912A (en) * | 2015-01-07 | 2015-05-13 | 胡文杰 | Filtering system on direct-current or alternating-current signal transmission circuit |
| CN106532761A (en) * | 2015-09-11 | 2017-03-22 | 沈阳兴东控制技术有限公司 | Multimodal photovoltaic grid-connected inverter |
| CN105119317A (en) * | 2015-10-24 | 2015-12-02 | 河南行知专利服务有限公司 | Method utilizing PV power generation device for compensation |
| CN106058931A (en) * | 2016-07-11 | 2016-10-26 | 太原理工大学 | Photovoltaic grid-connected inverter comprising electric energy quality processing, and control method thereof |
| CN106208134A (en) * | 2016-07-29 | 2016-12-07 | 常熟理工学院 | Grid-connected topology based on three-phase CLC immittance converter and Poewr control method |
| CN106208134B (en) * | 2016-07-29 | 2018-11-23 | 常熟理工学院 | Grid-connected topology and Poewr control method based on three-phase CLC immittance converter |
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