CN101409516B - Simple network-connecting generation inverter - Google Patents
Simple network-connecting generation inverter Download PDFInfo
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- CN101409516B CN101409516B CN2008101200527A CN200810120052A CN101409516B CN 101409516 B CN101409516 B CN 101409516B CN 2008101200527 A CN2008101200527 A CN 2008101200527A CN 200810120052 A CN200810120052 A CN 200810120052A CN 101409516 B CN101409516 B CN 101409516B
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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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Abstract
The invention relates to a simple grid-connected power generation inverter. The technical problem to be solved is to provide a simple grid-connected power generation inverter which is applicable to inversion of photovoltaic and wind-energy interconnection system. The technical proposal used for solving the problem is that the inverter consists of a DC/AC high-frequency inverter conversion main circuit, a voltage current sampling circuit, a PFC control circuit and an isolation driving circuit; direct current converted by photovoltaic or wind energy is used as inverter input bus voltage; a sine wave current is output by the inverter conversion of the DC/AC high-frequency inverter conversion main circuit; the output terminal of the high-frequency converter conversion main circuit is connected with the voltage current sampling circuit; the current and voltage signals output by the circuit are provided to the PFC control circuit and controlled by the PFC high-power factor rectifier control chip of the circuit; the PWM waveform output by the PFC control circuit is connected with the DC/AC high-frequency inverter conversion main circuit by an isolation driving circuit. The simple grid-connected power generation inverter can be used for photovoltaic or wind energy grid-connected inversion.
Description
Technical field
The present invention relates to a kind of easy network-connecting generation inverter, be particularly useful for photovoltaic or wind energy parallel network reverse and use.
Background technology
The large-scale application of solar energy and wind energy will be the important symbol of 21 century progress of human society, and photovoltaic (wind energy) grid-connected system is the development trend of photovoltaic (wind energy) system.The great advantage of photovoltaic (wind energy) grid-connected system is without batteries to store energy, thereby has saved investment, system simplification and be easy to safeguard.
But at present, the structure of general photovoltaic (wind energy) combining inverter that generally adopts as shown in Figure 1, photovoltaic (wind energy) combining inverter mainly is made up of two parts: preceding stage DC-DC converter and back level DC-AC inverter, this 2 part is connected by DClink, the voltage of DClink is (when civil power is the 220V system) about 400V, in this system, the DC-AC inverter converts electric energy to the sinusoidal ac of 220V/50Hz.The sinusoidal current of system's assurance combining inverter output and the phase voltage of electrical network are with frequency and homophase.Simultaneously, traditional photovoltaic parallel in system needs to adopt anti-island effect control method for solving the island effect problem.Therefore the acp chip of control circuit generally adopts DSP, has the problem of control system and algorithm complexity, protective value difference.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of easy network-connecting generation inverter that is applicable to that photovoltaic, the inversion of wind energy grid-connected system are used is provided, and purpose is to make inverter simple and reliable.
The technical solution adopted in the present invention is: easy network-connecting generation inverter, and it is characterized in that: this inverter is made up of DC/AC high-frequency inversion conversion main circuit, electric current and voltage sample circuit, PFC control circuit and isolated drive circuit; The direct voltage DC that is transformed into by photovoltaic or wind energy is as inversion inlet highway voltage, through DC/AC high-frequency inversion conversion main circuit inversion conversion, the sine-wave current of output tracking line voltage; Output at DC/AC high-frequency inversion conversion main circuit is connected with the electric current and voltage sample circuit, the electric current and the mains voltage signal of this circuit output offer the PFC control circuit, control by the PFC High Power Factor rectification control chip that this circuit model is UC3854, make net side power factor λ=1; Pwm signal by PFC control circuit output is connected to DC/AC high-frequency inversion conversion main circuit through isolated drive circuit, as the drive signal of the driving tube of semi-bridge inversion;
Described electric current and voltage sample circuit comprises line voltage sample circuit and current sampling circuit, wherein:
The line voltage sample circuit a road through resistance R
13, R
14As PFC High Power Factor rectification control chip U
3The voltage-tracing benchmark, another road is through resistance R
11, R
12And comparator U
2BThe voltage zero-crossing detection circuit of forming is used to provide the polarity upset signal of semi-bridge inversion pwm signal;
Current sampling circuit a road through resistance R
23Be connected to PFC High Power Factor rectification control chip U
3Pin 5 as current sample feedback signal input, another road is through resistance R
24Input to control chip U
3Pin 2, as the automatic current limiting input signal, Third Road is through resistance R
25And capacitor C
4Filtering is as output average current feedback signal, by resistance R
3Be connected to by operational amplifier U
1B, resistance R
6, capacitor C
2, C
3The output current PI regulating circuit of forming, resistance R
1, R
2, voltage reference tube Q
6And adjustable resistance VR
1Form the current signal given circuit, through described PI regulating circuit, again via resistance R
7, R
8, R
9With operational amplifier U
1AThe negative circuit of forming exports resistance R to
10, be connected to PFC High Power Factor rectification control chip U
3Signal input pin 11, as chip U
3The multiplier input control signal with control internal reference signal amplitude.
Described DC/AC high-frequency inversion conversion main circuit is by semi-bridge inversion input filter capacitor C
20, C
21, driving tube Q
1, Q
2And inductance L
1Form, direct voltage+Vbus that the input termination of this circuit is transformed into by photovoltaic or wind energy ,-Vbus is as inversion inlet highway voltage, through driving tube Q
1, Q
2The inversion conversion is by inductance L
1Export simple sinusoidal alternating current after the filtering.
Described PFC control circuit is by PFC High Power Factor rectification control chip U
3And the peripheral circuit composition, under the effect of electric current and voltage sample circuit input signal, by control chip U
3The required pwm signal of pin 16 output isolated drive circuits.
Described isolated drive circuit comprises XOR gate U
5A, inverter U
6A, model is the optocoupler U of TLP250
1, U
2, be connected to XOR gate U from the pwm signal of PFC control circuit output
5APin 1, XOR gate U
5APin 2 meet comparator U
2BThe required polarity upset signal of inversion of output, two signals are through XOR gate U
5ABehind the XOR, the one tunnel through resistance R
32Be connected to optocoupler U
2Pin 3, as semi-bridge inversion driving tube Q
1Drive signal; Another road is through inverter U
6AAfter anti-phase, again through resistance R
31Be connected to optocoupler U
1 Pin 3, as semi-bridge inversion driving tube Q
2Drive signal.
The invention has the beneficial effects as follows: adopt simple PFC control chip, realized the parallel network reverse function, make inverter net side power factor λ=1, i.e. current on line side I
NUndistorted and with voltage on line side U
NThe phase place unanimity, and this circuit has simple and reliable characteristics.
Description of drawings
Fig. 1 is a circuit block diagram of the present invention.
Fig. 2 is an electrical schematic diagram of the present invention.
Fig. 3 is the circuit block diagram of prior art of the present invention.
Embodiment
As shown in Figure 1 and Figure 2, present embodiment is made up of DC/AC high-frequency inversion conversion main circuit 1, electric current and voltage sample circuit 2, PFC control circuit 3 and isolated drive circuit 4.The direct voltage DC that is transformed into by photovoltaic or wind energy is as inversion inlet highway voltage, through the 1 inversion conversion of DC/AC high-frequency inversion conversion main circuit, the sine-wave current of output tracking line voltage; Output at DC/AC high-frequency inversion conversion main circuit 1 is connected with electric current and voltage sample circuit 2, the electric current and the mains voltage signal of this circuit output offer PFC control circuit 3, PFC High Power Factor rectification control chip by this circuit is controlled, and makes net side power factor λ=1; PWM waveform by PFC control circuit 3 output is connected to DC/AC high-frequency inversion conversion main circuit 1 through isolated drive circuit 4, as the drive signal of the driving tube of semi-bridge inversion.
This routine DC/AC high-frequency inversion conversion main circuit 1 is by semi-bridge inversion input filter capacitor C
20, C
21, driving tube Q
1, Q
2And inductance L
1Form, the input termination of this circuit by photovoltaic or wind energy be transformed into+Vbus ,-Vbus is as inversion inlet highway voltage, through Q
1, Q
2The inversion conversion is by L
1The simple sinusoidal alternating current of output tracking line voltage after the filtering is finished luminous energy or the wind energy purpose to electrical network output energy.
This routine electric current and voltage sample circuit 2 comprises line voltage sample circuit T
2, BR
2With current sampling circuit T
1, BR
1, R
26, wherein:
The line voltage sample circuit a road through resistance R
13, R
14As PFC High Power Factor rectification control chip U
3The voltage-tracing benchmark, another road is through resistance R
11, R
12And comparator U
2BThe voltage zero-crossing detection circuit of forming is used to provide the polarity upset signal of semi-bridge inversion pwm control signal;
In the current sampling circuit a road is through R
23Be connected to PFC High Power Factor rectification control chip U
3Pin 5 as current sample feedback signal input, another road is through R
24Input to U
3Pin 2, as the automatic current limiting input signal, another road signal is through resistance R
25And capacitor C
4Filtering is as output average current feedback signal, by resistance R
3Be connected to by operational amplifier U
1B, resistance R
6, capacitor C
2, C
3The output current PI regulating circuit of forming, resistance R
1, R
2, voltage reference tube Q
6And adjustable resistance VR
1Form the current signal given circuit, through described PI regulating circuit, again via resistance R
7, R
8, R
9With operational amplifier U
1AThe negative circuit of forming exports resistance R to
10, be connected to PFC High Power Factor rectification control chip U
3Signal input pin 11, as chip U
3The multiplier input control signal with control internal reference signal amplitude.
This routine PFC control circuit 3 is by PFC High Power Factor rectification control chip U
3(model UC3854) and peripheral circuit thereof are formed, and under the effect of above-described electric current and voltage sample circuit 2 each input signal, pass through U
3The required pwm signal of pin 16 output isolated drive circuit 4.
This routine isolated drive circuit 4 comprises XOR gate U
5A, inverter U
6A, optocoupler U
1(model TLP250), U
2(model TLP250), the pwm signal of exporting from the pin 16 of PFC control circuit 3 is connected to XOR gate U
5APin 1, U
5APin 2 meet U
2BThe required polarity upset signal of inversion of output, two signals are through U
5ABehind the XOR, the one tunnel through resistance R
32Be connected to optocoupler U
2Pin 3, as semi-bridge inversion driving tube Q
1Drive signal; Another road is through inverter U
6AAfter anti-phase, again through resistance R
31Be connected to optocoupler U
1Pin 3, as semi-bridge inversion driving tube Q
2Drive signal.
The present invention adopts the inverter main circuit with energy two-way flow, be semibridge system or full-bridge type inverter circuit, by detecting output current and mains voltage signal, control by PFC High Power Factor rectification control chip, make net side power factor λ=1, be that current on line side is undistorted and consistent with the voltage on line side phase place, be fed back to the active power of having only of electrical network like this, and can realize the feedback electric current I
NQuick adjustment.
Claims (4)
1. easy network-connecting generation inverter, it is characterized in that: this inverter is made up of DC/AC high-frequency inversion conversion main circuit (1), electric current and voltage sample circuit (2), PFC control circuit (3) and isolated drive circuit (4); The direct voltage that is transformed into by photovoltaic or wind energy is as inversion inlet highway voltage, through DC/AC high-frequency inversion conversion main circuit (1) inversion conversion, the sine-wave current of output tracking line voltage; Output at DC/AC high-frequency inversion conversion main circuit (1) is connected with electric current and voltage sample circuit (2), the electric current and the mains voltage signal of this electric current and voltage sample circuit output offer PFC control circuit (3), control by the PFC High Power Factor rectification control chip in the PFC control circuit, make net side power factor λ=1, the model of this PFC High Power Factor rectification control chip is UC3854; Pwm signal by PFC control circuit (3) output is connected to DC/AC high-frequency inversion conversion main circuit (1) through isolated drive circuit (4), as the drive signal of the driving tube of semi-bridge inversion;
Described electric current and voltage sample circuit (2) comprises line voltage sample circuit and current sampling circuit, wherein:
The line voltage sample circuit a road through resistance R
13, R
14As PFC High Power Factor rectification control chip U
3The voltage-tracing benchmark, another road is through resistance R
11, R
12And comparator U
2BThe voltage zero-crossing detection circuit of forming is used to provide the polarity upset signal of semi-bridge inversion pwm signal;
Current sampling circuit a road through resistance R
23Be connected to PFC High Power Factor rectification control chip U
3Pin 5 as current sample feedback signal input, another road is through resistance R
24Input to control chip U
3Pin 2, as the automatic current limiting input signal, Third Road is through resistance R
25And capacitor C
4Filtering is as output average current feedback signal, by resistance R
3Be connected to by operational amplifier U
1B, resistance R
6, capacitor C
2, C
3The output current PI regulating circuit of forming, resistance R
1, R
2, voltage reference tube Q
6And adjustable resistance VR
1Form the current signal given circuit, through described PI regulating circuit, again via resistance R
7, R
8, R
9With operational amplifier U
1AThe negative circuit of forming exports resistance R to
10, be connected to PFC High Power Factor rectification control chip U
3Signal input pin 11, as chip U
3The multiplier input control signal with control internal reference signal amplitude.
2. easy network-connecting generation inverter according to claim 1 is characterized in that: described DC/AC high-frequency inversion conversion main circuit (1) is by semi-bridge inversion input filter capacitor C
20, C
21, driving tube Q
1, Q
2And inductance L
1Form, direct voltage+Vbus that the input termination of this circuit is transformed into by photovoltaic or wind energy ,-Vbus is as inversion inlet highway voltage, through driving tube Q
1, Q
2The inversion conversion is by inductance L
1Export simple sinusoidal alternating current after the filtering.
3. easy network-connecting generation inverter according to claim 1 is characterized in that: described PFC control circuit (3) is by PFC High Power Factor rectification control chip U
3And the peripheral circuit composition, under the effect of electric current and voltage sample circuit (2) input signal, by control chip U
3The required pwm signal of pin 16 output isolated drive circuits (4).
4. easy network-connecting generation inverter according to claim 1 is characterized in that: described isolated drive circuit (4) comprises XOR gate U
5A, inverter U
6A, model is the optocoupler U of TLP250
1, U
2, be connected to XOR gate U from the pwm signal of PFC control circuit (3) output
5APin 1, XOR gate U
5APin 2 meet comparator U
2BThe required polarity upset signal of inversion of output, two signals are through XOR gate U
5ABehind the XOR, the one tunnel through resistance R
32Be connected to optocoupler U
2Pin 3, as semi-bridge inversion driving tube Q
1Drive signal; Another road is through inverter U
6AAfter anti-phase, again through resistance R
31Be connected to optocoupler U
1Pin 3, as semi-bridge inversion driving tube Q
2Drive signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101200527A CN101409516B (en) | 2008-07-16 | 2008-07-16 | Simple network-connecting generation inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101200527A CN101409516B (en) | 2008-07-16 | 2008-07-16 | Simple network-connecting generation inverter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101409516A CN101409516A (en) | 2009-04-15 |
| CN101409516B true CN101409516B (en) | 2011-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101200527A Expired - Fee Related CN101409516B (en) | 2008-07-16 | 2008-07-16 | Simple network-connecting generation inverter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103997250A (en) * | 2014-05-29 | 2014-08-20 | 甘肃西柴动力机电制造有限公司 | Digital control voltage stabilizing inverter |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012155297A1 (en) * | 2011-05-18 | 2012-11-22 | General Electric Company | Power generation system, power converter system, and method of operating power converter system |
| CN103151907A (en) * | 2011-12-07 | 2013-06-12 | 哈尔滨智木科技有限公司 | High-power metal-oxide-semiconductor field effect transistor (MOSFET) driving method |
| CN108562779B (en) * | 2017-12-15 | 2020-07-31 | 爱士惟新能源技术(江苏)有限公司 | Method for analyzing and controlling signals of input pin of operational amplifier in photovoltaic inverter power grid sampling |
| CN109599843A (en) * | 2019-01-09 | 2019-04-09 | 深圳市德兰明海科技有限公司 | A kind of current foldback circuit and inverter of light-coupled isolation |
-
2008
- 2008-07-16 CN CN2008101200527A patent/CN101409516B/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 孔凡东,易传锐.UC3854在有源功率因数校正电路中的应用.《国外电子元器件》.1998,(第9期),第43页,第45页、图1. * |
| 杨军,金新民,童亦斌.1kw光伏并网逆变器的设计.《电源技术应用》.2008,第11卷(第3期),第10-13页、图1-2. * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103997250A (en) * | 2014-05-29 | 2014-08-20 | 甘肃西柴动力机电制造有限公司 | Digital control voltage stabilizing inverter |
| CN103997250B (en) * | 2014-05-29 | 2017-08-01 | 甘肃居立门业有限责任公司 | A kind of digital control regulated inverter |
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| Publication number | Publication date |
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| CN101409516A (en) | 2009-04-15 |
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Owner name: HANGZHOU SINOCOM TECHNOLOGY CO., LTD. Free format text: FORMER NAME: ZHONGXIN NETWORK AUTOMATION CO., LTD., HANGZHOU |
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Address after: 310012, room 5, building 18, building 1, Huaxing Industrial Village, No. 502 Tang Miao Road, Zhejiang, Xihu District, Hangzhou, China Patentee after: Hangzhou Sinocom High-Tech Co., Ltd. Address before: 310012 No. 502, building 1, Huaxing Industrial Village, 18 Tong Miao Road, Zhejiang, Hangzhou Patentee before: Zhongxin Network Automation Co., Ltd., Hangzhou |
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