CN203617965U - Photovoltaic string/array output power optimization, combining, fire hazard monitoring device - Google Patents
Photovoltaic string/array output power optimization, combining, fire hazard monitoring device Download PDFInfo
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- CN203617965U CN203617965U CN201320806761.7U CN201320806761U CN203617965U CN 203617965 U CN203617965 U CN 203617965U CN 201320806761 U CN201320806761 U CN 201320806761U CN 203617965 U CN203617965 U CN 203617965U
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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
Abstract
Provided is a photovoltaic string/array output power optimization, combining, fire hazard monitoring device. Output ends of n groups of photovoltaic strings/arrays are connected with photovoltaic string combining units in a combining box through power cables. After combining, output is carried out into a switch cabinet, combining is carried out again through the switch cabinet, and input is carried out into an inverter. The device also comprises n power optimization function modules. The power optimization function modules are composed of a CPU of an original combining box, a PWM isolation driving module and n buck-boost power modules. The power optimization function modules are connected with the original CPU in the combining box through the PWM isolation driving module. The CPU controls turn-on and turn-off of electronic switches in the power optimization function modules. N groups of photovoltaic strings/arrays are connected with input ends of n groups of fuse wires, n current sensors, n buck-boost power modules through power cables in one-to-one correspondence. The output ends of the buck-boost power modules are connected with a combining busbar, output is carried out through a lightning arrester, a voltage sensor, a breaker or an isolation switch, and optimized photovoltaic power is provided for an inverter.
Description
Technical field
The utility model relates to a kind of intelligent junction box of solar photovoltaic generation system, particularly a kind ofly has the optimization of photovoltaic group string/array output power, confluxes and the device of fire hazard monitoring function.
Background technology
Photovoltaic plant develop rapidly under national Policy Encouraging at present, and Introduction of Photovoltaics allows of no optimist, the decrease in efficiency causing because shade, pollution, uneven illumination, performance are inconsistent etc. is perplexing each power station, bring huge loss to photovoltaic generation, directly affect the performance assessment criteria of energy output.According to external certain enterprise's experimental analysis, block if any the bulk below 18%, can make Guang volt generate electricity Xi System Lose and go out power and decline 82%, and 12.5% Transverse to be to blocking, Shi Xi System Lose goes out power and declines 39%.
Therefore address the above problem, improving generating efficiency is one of problem of paying close attention to both at home and abroad at present.Existing market has been released several method successively, as: 1) on assembly, install MPPT power optimization device additional, can greatly improve present situation, but be obstructed because cost is high, installation difficulty etc. released application; 2) counterflow-preventing header box, can prevent adverse current, but when group string/square formation is by partial occlusion, this group string/square formation dump power can not be utilized, and causes power loss.
Utility model content
The purpose of this utility model is to overcome existing photovoltaic group string/array due to the shortcoming that shade, pollution, uneven illumination, performance inconsistency etc. cause generated output to reduce, and proposes the optimization of a kind of photovoltaic group string/array output power, confluxes, fire-disaster monitoring device.The utility model can be inverter provides the power input of optimization, prevents that hot spot effect from causing assembly permanent damages simultaneously, carries out fire alarm, and can disconnect in time current supply circuit.
Have conflux, the intelligent junction box of fire alarm is one of building block of solar photo-voltaic power generation station.The output of the photovoltaic group string/array being made up of several photovoltaic cell component series and parallels is connected by output power cable and the photovoltaic group string in the header box unit that confluxes.Can have the output of many group photovoltaic group string/arrays to be connected in same intelligent junction box, after confluxing, output to switch cubicle, switch cubicle confluxes the output current of header box more again, input inverter.For the temperature sensing cable that prevents from that fire from occurring, adopt being parallel to photovoltaic group string/array, power cable by monitoring unit monitor in real time, analysis and early warning, and information is transmitted to monitoring power station administrative center and reports to the police.
The utility model is by the following technical solutions:
The present invention is confluxed, is increased power optimization functional module in the intelligent junction box of fire alarm having, and this power optimization functional module is made up of former header box CPU, PWM isolation drive module and n up-down voltage power module, n >=1.The input of power optimization functional module is connected with the fuse of header box, the output of power optimization functional module is connected with the busbar that confluxes of header box, power optimization functional module is connected with original CPU in header box by PWM isolation drive module, the switching of the electronic switch in described CPU power ratio control optimizational function module.
Increase in the header box of power optimization functional module, the corresponding connection of input with n group fuse, a n current sensor, a n up-down voltage power module through power cable of n group photovoltaic group string/array, the output of up-down voltage power module is connected with the busbar that confluxes, and through lightning arrester, voltage sensor, circuit breaker or isolating switch output, provide inverter to optimize photo-voltaic power supply, n >=1.
CPU is by electric current, the voltage data of its A/D interface Real-Time Monitoring transducer photovoltaic group string/array, and by the temperature sensing cable state of its I/O port monitoring power cable, the PWM interface output of CPU is connected with up-down voltage power module through the output of PWM isolation drive module.
Input in described each up-down voltage power module is connected with the D of electronic switch Jn_1, the S of electronic switch Jn_1 is connected with D, inductance L n one end of electronic switch Jn_2 respectively, the inductance L n other end is connected with diode Dn is anodal, the output of Dn negative pole is connected with up-down voltage power module output outn end, and the S of electronic switch Jn_2 is connected with busbar negative pole.And the G of electronic switch Jn_1, Jn_2 end is exported corresponding connection with PWM isolation drive module respectively.
By I/O interface, the temperature sensing cable binding post of CPU, n group photovoltaic group string/array, power cable, the unit that confluxes are carried out to fire monitoring with n group photovoltaic group string/array and the parallel n root temperature sensing cable of laying of n root power cable, and exported by the PWM interface in CPU, through PWM isolation drive module output drive signal, control the opening of electronic switch in n group buck module, disconnected, realize the control of n group photovoltaic group string/array power supply output loop.
Operation principle of the present utility model and the course of work are as follows:
In the time of photovoltaic group string/array normal power generation, CPU monitors electric current, the voltage data of photovoltaic group string/array by current sensor, when each photovoltaic group string/array current≤deviate, CPU according to assembly optimizing power strategy at PWM interface output pulse signal, the electronic switch of controlling respectively in buck module through PWM driving isolation module cuts out, electronic switch is by the conversion of pulse control inductance energy, and through diode output, n organizes photovoltaic group string/array optimization power and is connected and confluxes with busbar, electric capacity.
As being blocked when certain group photovoltaic group string/array, when output current minimizing, lower voltage, best power point is changed, CPU monitors reduce >=deviate of this channel current by current sensor, CPU according to group string/array be blocked control strategy at PWM interface through PWM isolation drive module stepping output pulse signal and Continuity signal, the conducting of Continuity signal control electronic switch, electric current is subject to carry out power conversion under pulse signal stepping output control at electronic switch by inductance, boosts to export with capacitor bus-bar conflux through diode.
Having while detecting that certain photovoltaic group string/array or a certain power cable have fire alarm signal in fire alarm function header box, CPU passes through PWM interface through PWM isolation drive module output signal, electronic switch in buck module is turn-offed, disconnect photovoltaic group string/array output loop, prevent that fire from occurring.
Header box is made up of n group photovoltaic group string/array, n individual conflux unit, PWM isolation drive module and cpu controller, every group of photovoltaic module/array output power principle of optimality is identical, each unit that confluxes is connected respectively to busbar and confluxes, and through lightning arrester, circuit breaker or the output of isolating switch direct current, provide inverter to optimize photo-voltaic power supply.Final data uploads to host computer by CPU communication interface RS-485.
The utlity model has following advantage:
1. utilize to have and conflux, increase power optimization unit in the intelligent junction box of fire alarm, the power loss causing as the factor such as shade, pollution is reduced;
2. after fire alarm, can disconnect photovoltaic group string/array power supply control, prevent that fire from occurring;
3. can make full use of " have conflux, the intelligent junction box of fire alarm " hardware, as current sensor, voltage sensor, CPU, communication, power supply, structure etc., it is low that relative component is installed MPPT power optimization device cost, has the advantages such as power station is easy for installation, practical.
4. owing to can each photovoltaic group string/array being carried out to MPPT power optimization, and outdoor installation can to realize power device naturally cooling, inverter concentrates MPPT power optimization, power device to force cooling effectiveness higher relatively.
Accompanying drawing explanation
Fig. 1 is the optimization of the utility model photovoltaic group string/array output power, conflux, fire-disaster monitoring device structured flowchart;
Embodiment
Further illustrate the present invention below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the utility model comprise n group photovoltaic group string/array, n root temperature sensing cable, n conflux unit, busbar+, busbar-, lightning arrester, circuit breaker or load separate pass, PWM isolation drive module, and singlechip CPU.N the unit that confluxes comprises n root fuse, n current sensor I, a n up-down voltage power module.
Described n group photovoltaic group string/array connects one to one in order by the input in1～inn of n root fuse, a n current sensor I and n the up-down voltage power module of n root power cable and n the unit that confluxes, and one group of photovoltaic group string/array is linked in sequence by the input of a fuse of a power cable and the unit that confluxes, a current sensor I and a up-down voltage power module.Input in1～inn of n up-down voltage power module J 1～Jn is connected with n inductance L 1～Ln, connect one to one through output out1～outn of n diode D1～Dn and up-down voltage power module J 1～Jn again, the input of a up-down voltage power module is connected with an inductance, the output of inductance is connected with the input of a diode, and the output of diode is connected with the output of up-down voltage power module.Output out1～outn of up-down voltage power module J 1～Jn is by the connection of confluxing of busbar, electric capacity, and through lightning arrester, circuit breaker or the output of isolating switch direct current+, direct current output-output, provide inverter to optimize photo-voltaic power supply.
The A/D interface of CPU respectively with electric current I 1～In, voltage V transducer connects, the electric current of monitoring photovoltaic group string/array, voltage data, by the state of its I/O interface monitor temperature sensing cable 1～n, exported at PWM port according to control strategy by CPU, through PWM isolation drive module drive output drive signal PWM1_1～PWMn_1, PWM1_2～PWMn_2, control respectively the electronic switch J1_1～Jn_1 in up-down voltage power module J 1～Jn, cut-offfing with pwm pulse of J1_2～Jn_2 modulated, photovoltaic group string/array is exported after boost power module J 1～Jn power optimization, output out1～outn and busbar by up-down voltage power module conflux, and through lightning arrester, circuit breaker by direct current output+, the output of-end.Equally, temperature sensing cable 1～n carries out fire monitoring by I/O interface, the temperature sensing cable binding post of CPU to photovoltaic group string/array 1～n, power cable 1～n, the unit 1～n that confluxes, and by the PWM output in CPU through PWM isolation drive module drive output drive signal PWM1_1～PWMn_1, PWM1_2～PWMn_2, electronic switch J1_1～the Jn_1, the J1_2～Jn_2 that control in buck module J 1～Jn cut-off, and realize photovoltaic group string/array 1～n power supply output loop is connected and the control of closing.
Claims (3)
1. photovoltaic group string/array output power optimization, conflux, fire-disaster monitoring device, the output of the n group photovoltaic group string/array being made up of several photovoltaic cell component series and parallels is connected by power cable and the photovoltaic group string in the header box unit that confluxes, after confluxing, output to switch cubicle, switch cubicle confluxes the output current of header box more again, input inverter, it is characterized in that, described device also comprises n power optimization functional module; Described power optimization functional module is made up of CPU, PWM isolation drive module and n the up-down voltage power module of former header box, power optimization functional module is connected by the interior original CPU of PWM isolation drive module and header box, the cut-offfing of the electronic switch in described CPU power ratio control optimizational function module; N group photovoltaic group string/array connects one to one through power cable and the input that n organizes fuse, a n current sensor, a n up-down voltage power module, the output of up-down voltage power module is connected with the busbar that confluxes, and through lightning arrester, voltage sensor, circuit breaker or isolating switch output, n >=1.
According to photovoltaic group string/array output power claimed in claim 1 optimization, conflux, fire-disaster monitoring device, it is characterized in that, described CPU is by electric current, the voltage data of its A/D interface Real-Time Monitoring transducer photovoltaic group string/array, and by the temperature sensing cable state of its I/O port monitoring power cable, the PWM interface output of CPU is connected with up-down voltage power module through the output of PWM isolation drive module.
According to photovoltaic group string/array output power claimed in claim 1 optimization, conflux, fire-disaster monitoring device, it is characterized in that, input in described each up-down voltage power module is connected with the D of electronic switch Jn_1 end, the S end of electronic switch Jn_1 is connected with D end, inductance L n one end of electronic switch Jn_2 respectively, the inductance L n other end is connected with diode Dn is anodal, the output of Dn negative pole is connected with up-down voltage power module output outn end, and the S of electronic switch Jn_2 is connected with busbar negative pole; The G end of electronic switch Jn_1, Jn_2 is exported corresponding connection with PWM isolation drive module respectively.
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| CN201320806761.7U CN203617965U (en) | 2013-12-09 | 2013-12-09 | Photovoltaic string/array output power optimization, combining, fire hazard monitoring device |
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| CN201320806761.7U CN203617965U (en) | 2013-12-09 | 2013-12-09 | Photovoltaic string/array output power optimization, combining, fire hazard monitoring device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377827A (en) * | 2014-11-21 | 2015-02-25 | 南车株洲电力机车研究所有限公司 | Photovoltaic direct-current power source |
| CN104393833A (en) * | 2014-11-21 | 2015-03-04 | 南车株洲电力机车研究所有限公司 | Photovoltaic intelligent power |
| CN104917202A (en) * | 2015-06-24 | 2015-09-16 | 北京科诺伟业科技股份有限公司 | Serial-type photovoltaic array high-voltage isolation high-power regulating device |
| CN105680794A (en) * | 2016-04-12 | 2016-06-15 | 常熟市福莱德连接器科技有限公司 | Enhanced photovoltaic combiner box in voltage compensation method |
| CN106575108A (en) * | 2014-08-04 | 2017-04-19 | Abb瑞士股份有限公司 | An industrial control system with communication bar and power bar |
| US10097108B2 (en) | 2014-12-16 | 2018-10-09 | Abb Schweiz Ag | Energy panel arrangement power dissipation |
| US10348094B2 (en) | 2015-01-28 | 2019-07-09 | Abb Schweiz Ag | Energy panel arrangement shutdown |
| US10404060B2 (en) | 2015-02-22 | 2019-09-03 | Abb Schweiz Ag | Photovoltaic string reverse polarity detection |
| JP2019193550A (en) * | 2018-04-28 | 2019-10-31 | ベイジン・ハナジー・ソーラー・パワー・インベストメント・カンパニー・リミテッド | Solar module junction box, solar system and control method for solar module |
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- 2013-12-09 CN CN201320806761.7U patent/CN203617965U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106575108A (en) * | 2014-08-04 | 2017-04-19 | Abb瑞士股份有限公司 | An industrial control system with communication bar and power bar |
| CN104377827A (en) * | 2014-11-21 | 2015-02-25 | 南车株洲电力机车研究所有限公司 | Photovoltaic direct-current power source |
| CN104393833A (en) * | 2014-11-21 | 2015-03-04 | 南车株洲电力机车研究所有限公司 | Photovoltaic intelligent power |
| CN104377827B (en) * | 2014-11-21 | 2017-03-01 | 南车株洲电力机车研究所有限公司 | A kind of photovoltaic DC power supply |
| US10122176B2 (en) | 2014-11-21 | 2018-11-06 | Crrc Zhuzhou Institute Co., Ltd. | Photovoltaic intelligent power supply |
| US10097108B2 (en) | 2014-12-16 | 2018-10-09 | Abb Schweiz Ag | Energy panel arrangement power dissipation |
| US10348094B2 (en) | 2015-01-28 | 2019-07-09 | Abb Schweiz Ag | Energy panel arrangement shutdown |
| US10404060B2 (en) | 2015-02-22 | 2019-09-03 | Abb Schweiz Ag | Photovoltaic string reverse polarity detection |
| CN104917202A (en) * | 2015-06-24 | 2015-09-16 | 北京科诺伟业科技股份有限公司 | Serial-type photovoltaic array high-voltage isolation high-power regulating device |
| CN105680794A (en) * | 2016-04-12 | 2016-06-15 | 常熟市福莱德连接器科技有限公司 | Enhanced photovoltaic combiner box in voltage compensation method |
| CN105680794B (en) * | 2016-04-12 | 2017-10-24 | 常熟市福莱德连接器科技有限公司 | Voltage compensation method Synergistic type photovoltaic combiner box and its method of work |
| JP2019193550A (en) * | 2018-04-28 | 2019-10-31 | ベイジン・ハナジー・ソーラー・パワー・インベストメント・カンパニー・リミテッド | Solar module junction box, solar system and control method for solar module |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140528 Termination date: 20211209 |