CN201230282Y - Auxiliary electric source actuating apparatus for solar photovoltaic combining inverter - Google Patents

Auxiliary electric source actuating apparatus for solar photovoltaic combining inverter Download PDF

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Publication number
CN201230282Y
CN201230282Y CNU2008200382970U CN200820038297U CN201230282Y CN 201230282 Y CN201230282 Y CN 201230282Y CN U2008200382970 U CNU2008200382970 U CN U2008200382970U CN 200820038297 U CN200820038297 U CN 200820038297U CN 201230282 Y CN201230282 Y CN 201230282Y
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CN
China
Prior art keywords
diode
triode
circuit
resistance
capacitor
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CNU2008200382970U
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Chinese (zh)
Inventor
贡力
韩雅炜
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江苏津恒能源科技有限公司
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Priority to CNU2008200382970U priority Critical patent/CN201230282Y/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers

Abstract

The utility model discloses an auxiliary power supply starter of a solar photovoltaic grid-connected inverter, which comprises a surge filter circuit, a converting circuit and a rectification unit which are sequentially and electrically connected. The surge filter circuit is electrically connected with a starting circuit; the starting circuit and the converting circuit are controlled by a control unit; the collector electrode of a triode Q1 in the starting circuit is connected with the output terminal of the surge filter circuit through a resistor R4; the base electrode of the triode Q1 is connected with one terminal of a resistor R5; the other terminal of the resistor R5 is connected with the negative terminal of a diode D2; the positive terminal of the diode D2 is connected with the rectification unit; the emitter of the triode Q1 is grounded; the base electrode of a triode Q2 is connected with the collector electrode of the triode Q1; the collector electrode of the triode Q2 is connected with the output terminal of the surge filter circuit after passing through a resistor R2; and the emitter of the triode Q2 is connected with the control unit. The utility model has the advantages of less power consumption of the starting circuit and high efficiency of the auxiliary power supply.

Description

Solar photovoltaic interconnected inverter auxiliary power start device

Technical field

The utility model belongs to the solar energy power generating power technique fields, specifically, relates to a kind of solar photovoltaic interconnected inverter auxiliary power start device.

Background technology

At present because the characteristic of solar cell, require the solar inverter input voltage range to want wide, and the inverter accessory power supply is the important component part of solar inverter, need to give each control circuit power supply, thereby make the solar inverter operate as normal, so just require the operating voltage in the solar inverter accessory power supply wideer.But in the application of reality, tend to run into when the low-voltage of operating voltage range, accessory power supply can not start, though or accessory power supply can start, do not reach the requirement of accessory power supply operate as normal in the wide input voltage range of design.Because accessory power supply need be operated in the voltage range of broad, the past start-up circuit of design is made up of a power resistor usually simultaneously, and ubiquity start-up circuit power consumption is serious, causes accessory power supply efficient low.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of start-up circuit power consumption less, the solar photovoltaic interconnected inverter auxiliary power start device that accessory power supply efficient is high.

The technical scheme that realizes above-mentioned purpose is: a kind of solar photovoltaic interconnected inverter auxiliary power start device, comprise the surge filter circuit that is electrically connected successively, translation circuit and rectification unit, described surge filter circuit is electrically connected with start-up circuit, the all controlled unit controls of described start-up circuit and translation circuit, its improvement is: described start-up circuit comprises resistance R 2, R4, R5 and diode D2 and triode Q1 and Q2, the collector electrode of described triode Q1 is connected with the output of surge filter circuit by resistance R 4, the base stage of triode Q1 is electrically connected with an end of resistance R 5, the other end of resistance R 5 is electrically connected with the negative terminal of diode D2, the anode of diode D2 is connected with rectification unit, the grounded emitter of triode Q1, the base stage of triode Q2 is connected with the collector electrode of triode Q1, and the collector electrode of triode Q2 is connected to the output of surge filter circuit after by resistance R 2, and the emitter of triode Q2 is connected to control unit.

For triode Q1 is played cushioning effect, protect triode Q1, described start-up circuit also comprises resistance R 6 and capacitor C 3, and resistance R 6 is in parallel with capacitor C 3, and an end of this parallel circuits is connected to negative terminal and the other end ground connection of diode D2.

Reverse recovery current is to the impact of triode Q2 when preventing that triode Q2 from turn-offing suddenly, and described start-up circuit also comprises diode D3, and the anode of diode D3 is connected with the emitter of triode Q2, and the negative terminal of diode D3 is connected to control unit.

The utility model has the advantages that accessory power supply just can start normally when lower solar energy input voltage, and can the design wide solar cell input voltage global extent in operate as normal, the start-up circuit power consumption is less, the efficient height of accessory power supply.

Description of drawings

Fig. 1 is a use block diagram of the present utility model;

Fig. 2 is a kind of use circuit diagram of the present utility model;

Fig. 3 uses circuit diagram for second kind of the present utility model;

Of the present utility model the third of Fig. 4 uses circuit diagram;

Fig. 5 uses circuit diagram for the 4th kind of the present utility model.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further described.

With reference to Fig. 1,2, a kind of solar photovoltaic interconnected inverter auxiliary power start device, comprise the surge filter circuit 2 that is electrically connected successively, translation circuit 3 and rectification unit 4, described surge filter circuit 2 is electrically connected with start-up circuit 6, all controlled unit 5 controls of described start-up circuit 6 and translation circuit 3, described start-up circuit 6 comprises resistance R 2, R4, R5 and diode D2 and triode Q1 and Q2, the collector electrode of described triode Q1 is connected with the output of surge filter circuit 2 by resistance R 4, the base stage of triode Q1 is electrically connected with an end of resistance R 5, the other end of resistance R 5 is electrically connected with the negative terminal of diode D2, the anode of diode D2 is connected with rectification unit 4, the grounded emitter of triode Q1, the base stage of triode Q2 is connected with the collector electrode of triode Q1, and the collector electrode of triode Q2 is connected to the output of surge filter circuit 2 after by resistance R 2, and the emitter of triode Q2 is connected to control unit 5.The input of described surge filter circuit 2 is connected to solar panel 1.

Described surge filter circuit 2 is the parallel circuits of thermistor R1, capacitor C 1 and C2.

Described translation circuit 3 comprises resistance R 7, capacitor C 6, diode D1, transformer V1 and switching tube Q3, be connected with the negative terminal of diode D1 again after described resistance R 7 and capacitor C 6 parallel connections, and be connected to the input of transformer V1, the input of transformer V1 also is electrically connected with switching tube Q3, and switching tube Q3 is by control unit 5 its work of control, and the output of transformer V1 connects rectification unit 4.

Described rectification unit 4 comprises diode D5.

Described control unit 5 comprises pulse width modulating chip, chip periphery circuit and peripheral power supply circuits, described peripheral power supply circuits comprise diode D4, capacitor C 4 and capacitor C 5, one end ground connection of capacitor C 4, the negative terminal of another terminating diode D4, one end ground connection of capacitor C 5, the anode of another terminating diode D4.Having that pulse width modulating chip can buy on the market is a variety of, and the pulse width modulating chip of Shi Yonging is the UC3842 that can buy on the market in the present embodiment, the custom circuit of its chip periphery circuit for being provided by pulse width modulating chip manufacturer.

With reference to Fig. 3, a kind of solar photovoltaic interconnected inverter auxiliary power start device, comprise the surge filter circuit 2 that is electrically connected successively, translation circuit 3 and rectification unit 4, described surge filter circuit 2 is electrically connected with start-up circuit 6, all controlled unit 5 controls of described start-up circuit 6 and translation circuit 3, described start-up circuit 6 comprises resistance R 2, R4, R5 and R6, capacitor C 3, diode D2 and D3 and triode Q1 and Q2, the collector electrode of described triode Q1 is connected with the output of surge filter circuit 2 by resistance R 4, the base stage of triode Q1 is electrically connected with an end of resistance R 5, the other end of resistance R 5 is electrically connected with the negative terminal of diode D2, the anode of diode D2 is connected with rectification unit 4, described resistance R 6 is in parallel with capacitor C 3, one end of this parallel circuits is connected to negative terminal and the other end ground connection of diode D2, the grounded emitter of triode Q1, triode Q2 base stage be connected with the collector electrode of triode Q1, and the collector electrode of triode Q2 is connected to the output of surge filter circuit 2 by resistance R 2, the emitter of triode Q2 is connected with the anode of diode D3, and the negative terminal of diode D3 is connected to control unit 5.The input of described surge filter circuit 2 is connected to solar panel 1.

Described surge filter circuit 2 is the parallel circuits of thermistor R1, capacitor C 1 and C2.

Described translation circuit 3 comprises resistance R 7, capacitor C 6, diode D1, transformer V1 and switching tube Q3, be connected with the negative terminal of diode D1 again after described resistance R 7 and capacitor C 6 parallel connections, and be connected to the input of transformer V1, the input of transformer V1 also is electrically connected with switching tube Q3, and switching tube Q3 is by control unit 5 its work of control, and the output of transformer V1 connects rectification unit 4.

Described rectification unit 4 comprises diode D5.

Described control unit 5 comprises pulse width modulating chip, chip periphery circuit and peripheral power supply circuits, described peripheral power supply circuits comprise diode D4, capacitor C 4 and capacitor C 5, one end ground connection of capacitor C 4, the negative terminal of another terminating diode D4, one end ground connection of capacitor C 5, the anode of another terminating diode D4.Having that pulse width modulating chip can buy on the market is a variety of, and the pulse width modulating chip that uses in the present embodiment is UC3842, the custom circuit of its chip periphery circuit for being provided by pulse width modulating chip manufacturer for what can buy on the market.

With reference to Fig. 4, a kind of solar photovoltaic interconnected inverter auxiliary power start device, comprise the surge filter circuit 2 that is electrically connected successively, translation circuit 3 and rectification unit 4, described surge filter circuit 2 is electrically connected with start-up circuit 6, all controlled unit 5 controls of described start-up circuit 6 and translation circuit 3, described start-up circuit 6 comprises resistance R 2, R4, R5, diode D2 and D3 and triode Q1 and Q2, the collector electrode of described triode Q1 is connected with the output of surge filter circuit 2 by resistance R 4, the base stage of triode Q1 is electrically connected with an end of resistance R 5, the other end of resistance R 5 is electrically connected with the negative terminal of diode D2, the anode of diode D2 is connected with rectification unit 4, the grounded emitter of triode Q1, triode Q2 base stage be connected with the collector electrode of triode Q1, and the collector electrode of triode Q2 is connected to the output of surge filter circuit 2 after by resistance R 2, and the emitter of triode Q2 is connected with the anode of diode D3, and the negative terminal of diode D3 is connected to control unit 5.The input of described surge filter circuit 2 is connected to solar panel 1.

Described surge filter circuit 2 is the parallel circuits of thermistor R1, capacitor C 1 and C2.

Described translation circuit 3 comprises resistance R 7, capacitor C 6, diode D1, transformer V1 and switching tube Q3, be connected with the negative terminal of diode D1 again after described resistance R 7 and capacitor C 6 parallel connections, and be connected to the input of transformer V1, the input of transformer V1 also is electrically connected with switching tube Q3, and switching tube Q3 is by control unit 5 its work of control, and the output of transformer V1 connects rectification unit 4.

Described rectification unit 4 comprises diode D5.

Described control unit 5 comprises pulse width modulating chip, chip periphery circuit and peripheral power supply circuits, described peripheral power supply circuits comprise diode D4, capacitor C 4 and capacitor C 5, one end ground connection of capacitor C 4, the negative terminal of another terminating diode D4, one end ground connection of capacitor C 5, the anode of another terminating diode D4.Having that pulse width modulating chip can buy on the market is a variety of, and the pulse width modulating chip that uses in the present embodiment is UC3842, the custom circuit of its chip periphery circuit for being provided by pulse width modulating chip manufacturer for what can buy on the market.

With reference to Fig. 5, a kind of solar photovoltaic interconnected inverter auxiliary power start device, comprise the surge filter circuit 2 that is electrically connected successively, translation circuit 3 and rectification unit 4, described surge filter circuit 2 is electrically connected with start-up circuit 6, all controlled unit 5 controls of described start-up circuit 6 and translation circuit 3, described start-up circuit 6 comprises resistance R 2, R4, R5 and R6, capacitor C 3, diode D2 and triode Q1 and Q2, the collector electrode of described triode Q1 is connected with the output of surge filter circuit 2 by resistance R 4, the base stage of triode Q1 is electrically connected with an end of resistance R 5, the other end of resistance R 5 is electrically connected with the negative terminal of diode D2, the anode of diode D2 is connected with rectification unit 4, described resistance R 6 is in parallel with capacitor C 3, one end of this parallel circuits is connected to negative terminal and the other end ground connection of diode D2, the grounded emitter of triode Q1, triode Q2 base stage be connected with the collector electrode of triode Q1, and the collector electrode of triode Q2 is connected to the output of surge filter circuit 2 after by resistance R 2, and the emitter of triode Q2 is connected to control unit 5.The input of described surge filter circuit 2 is connected to solar panel 1.

Described surge filter circuit 2 is the parallel circuits of thermistor R1, capacitor C 1 and C2.

Described translation circuit 3 comprises resistance R 7, capacitor C 6, diode D1, transformer V1 and switching tube Q3, be connected with the negative terminal of diode D1 again after described resistance R 7 and capacitor C 6 parallel connections, and be connected to the input of transformer V1, the input of transformer V1 also is electrically connected with switching tube Q3, and switching tube Q3 is by control unit 5 its work of control, and the output of transformer V1 connects rectification unit 4.

Described rectification unit 4 comprises diode D5.

Described control unit 5 comprises pulse width modulating chip, chip periphery circuit and peripheral power supply circuits, described peripheral power supply circuits comprise diode D4, capacitor C 4 and capacitor C 5, one end ground connection of capacitor C 4, the negative terminal of another terminating diode D4, one end ground connection of capacitor C 5, the anode of another terminating diode D4.Having that pulse width modulating chip can buy on the market is a variety of, and the pulse width modulating chip that uses in the present embodiment is UC3842, the custom circuit of its chip periphery circuit for being provided by pulse width modulating chip manufacturer for what can buy on the market.

The accessory power supply operating voltage range of solar inverter is 200V~550V; when input voltage during at 200V; accessory power supply begins to start; bus current makes triode Q2 conducting by resistance R 4; current flowing resistance R2 and diode D3 make the pulse width modulating chip in the control unit 5 begin to start; after operate as normal; the electric current of secondary induction makes triode Q1 conducting through diode D2 and resistance R 5; triode Q2 is cut off; start-up circuit 6 quits work; this circuit has solved because starting resistor is low; power supply is when the high voltage 550V of wide input range; the progressively increasing of electric current of leakage current and secondary induction causes power protection not work, thus can not be in wide solar cell input voltage global extent operate as normal.The starting resistance power consumption is seriously controlled, and the efficient of power supply gets a promotion.

Claims (9)

1, a kind of solar photovoltaic interconnected inverter auxiliary power start device, comprise the surge filter circuit (2) that is electrically connected successively, translation circuit (3) and rectification unit (4), described surge filter circuit (2) is electrically connected with start-up circuit (6), described start-up circuit (6) and all controlled unit of translation circuit (3) (5) control, it is characterized in that: described start-up circuit (6) comprises resistance R 2, R4, R5 and diode D2 and triode Q1 and Q2, the collector electrode of described triode Q1 is connected with the output of surge filter circuit (2) by resistance R 4, the base stage of triode Q1 is electrically connected with an end of resistance R 5, the other end of resistance R 5 is electrically connected with the negative terminal of diode D2, the anode of diode D2 is connected with rectification unit (4), the grounded emitter of triode Q1, the base stage of triode Q2 is connected with the collector electrode of triode Q1, and the collector electrode of triode Q2 is connected to the output of surge filter circuit (2) after by resistance R 2, and the emitter of triode Q2 is connected to control unit (5).
2, solar photovoltaic interconnected inverter auxiliary power start device according to claim 1, it is characterized in that: described start-up circuit (6) also comprises resistance R 6 and capacitor C 3, resistance R 6 is in parallel with capacitor C 3, and an end of this parallel circuits is connected to negative terminal and the other end ground connection of diode D2.
3, solar photovoltaic interconnected inverter auxiliary power start device according to claim 1, it is characterized in that: described start-up circuit (6) also comprises diode D3, the anode of diode D3 is connected with the emitter of triode Q2, and the negative terminal of diode D3 is connected to control unit (5).
4, solar photovoltaic interconnected inverter auxiliary power start device according to claim 2, it is characterized in that: described start-up circuit (6) also comprises diode D3, the anode of diode D3 is connected with the emitter of triode Q2, and the negative terminal of diode D3 is connected to control unit (5).
5, solar photovoltaic interconnected inverter auxiliary power start device according to claim 1, it is characterized in that: described surge filter circuit (2) is the parallel circuits of thermistor R1, capacitor C 1 and C2.
6, solar photovoltaic interconnected inverter auxiliary power start device according to claim 1, it is characterized in that: described translation circuit (3) comprises resistance R 7, capacitor C 6, diode D1, transformer V1 and switching tube Q3, be connected with the negative terminal of diode D1 again after described resistance R 7 and capacitor C 6 parallel connections, and be connected to the input of transformer V1, the input of transformer V1 also is electrically connected with switching tube Q3, and switching tube Q3 controls its work by control unit, and the output of transformer V1 connects rectification unit (4).
7, according to claim 1 or 2 or 3 or 4 or 5 or 6 described solar photovoltaic interconnected inverter auxiliary power start devices, it is characterized in that: described rectification unit (4) comprises diode D5.
8, solar photovoltaic interconnected inverter auxiliary power start device according to claim 7, it is characterized in that: described control unit (5) comprises pulse width modulating chip, chip periphery circuit and peripheral power supply circuits, described peripheral power supply circuits comprise diode D4, capacitor C 4 and capacitor C 5, one end ground connection of capacitor C 4, the negative terminal of another terminating diode D4, one end ground connection of capacitor C 5, the anode of another terminating diode D4.
9, solar photovoltaic interconnected inverter auxiliary power start device according to claim 8, it is characterized in that: described pulse width modulating chip is UC3842.
CNU2008200382970U 2008-07-14 2008-07-14 Auxiliary electric source actuating apparatus for solar photovoltaic combining inverter CN201230282Y (en)

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CNU2008200382970U CN201230282Y (en) 2008-07-14 2008-07-14 Auxiliary electric source actuating apparatus for solar photovoltaic combining inverter

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102904452A (en) * 2012-09-27 2013-01-30 温州大学 Auxiliary power supply based on off-network photovoltaic power generation system
CN103051164A (en) * 2011-10-14 2013-04-17 成都锐奕信息技术有限公司 Filter circuit for filtering output voltage of battery
CN103140931A (en) * 2010-11-09 2013-06-05 Sma太阳能技术股份公司 Circuit arrangement for setting a potential of a photovoltaic generator
CN104143904A (en) * 2014-07-31 2014-11-12 阳光电源股份有限公司 Protection circuit of auxiliary power source of photovoltaic inverter and related devices
CN104170234A (en) * 2012-06-06 2014-11-26 富士电机株式会社 Power conversion system and voltage detection device therefor
CN104348347A (en) * 2013-08-09 2015-02-11 华为技术有限公司 Starting circuit for auxiliary power supply of photovoltaic inverter
CN104467394A (en) * 2014-11-28 2015-03-25 广州三晶电气有限公司 Circuit assisting power starting and voltage detecting and controlling method
US9484734B2 (en) 2012-02-20 2016-11-01 Sma Solar Technology Ag Protection of photovoltaic modules of a photovoltaic generator against surge voltages relative to ground

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103140931B (en) * 2010-11-09 2016-05-18 Sma太阳能技术股份公司 Be used for the circuit arrangement of the electromotive force of setting photovoltaic generator
CN103140931A (en) * 2010-11-09 2013-06-05 Sma太阳能技术股份公司 Circuit arrangement for setting a potential of a photovoltaic generator
CN103051164A (en) * 2011-10-14 2013-04-17 成都锐奕信息技术有限公司 Filter circuit for filtering output voltage of battery
US9484734B2 (en) 2012-02-20 2016-11-01 Sma Solar Technology Ag Protection of photovoltaic modules of a photovoltaic generator against surge voltages relative to ground
CN104170234A (en) * 2012-06-06 2014-11-26 富士电机株式会社 Power conversion system and voltage detection device therefor
CN104170234B (en) * 2012-06-06 2017-05-17 富士电机株式会社 Power conversion system and voltage detection device therefor
CN102904452A (en) * 2012-09-27 2013-01-30 温州大学 Auxiliary power supply based on off-network photovoltaic power generation system
CN104348347B (en) * 2013-08-09 2017-02-15 华为技术有限公司 Starting circuit for auxiliary power supply of photovoltaic inverter
CN104348347A (en) * 2013-08-09 2015-02-11 华为技术有限公司 Starting circuit for auxiliary power supply of photovoltaic inverter
CN104143904A (en) * 2014-07-31 2014-11-12 阳光电源股份有限公司 Protection circuit of auxiliary power source of photovoltaic inverter and related devices
CN104467394A (en) * 2014-11-28 2015-03-25 广州三晶电气有限公司 Circuit assisting power starting and voltage detecting and controlling method

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