CN104158394A - Auto-starting control method for photovoltaic inverter - Google Patents

Auto-starting control method for photovoltaic inverter Download PDF

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Publication number
CN104158394A
CN104158394A CN201410320614.8A CN201410320614A CN104158394A CN 104158394 A CN104158394 A CN 104158394A CN 201410320614 A CN201410320614 A CN 201410320614A CN 104158394 A CN104158394 A CN 104158394A
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CN
China
Prior art keywords
inverter
photovoltaic
ac converter
sending
photovoltaic dc
Prior art date
Application number
CN201410320614.8A
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Chinese (zh)
Inventor
程刚
徐遥
査宏胜
聂群
Original Assignee
安徽金峰新能源股份有限公司
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Application filed by 安徽金峰新能源股份有限公司 filed Critical 安徽金峰新能源股份有限公司
Priority to CN201410320614.8A priority Critical patent/CN104158394A/en
Publication of CN104158394A publication Critical patent/CN104158394A/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 electric or electronic aspects
    • Y02E10/563Power conversion electric or electronic aspects for grid-connected applications

Abstract

The invention discloses an auto-starting control method for a photovoltaic inverter. The method comprises the following steps: sampling voltage, current and temperature parameters of the photovoltaic inverter; continuously sampling if the voltage, current and temperature parameters of the photovoltaic inverter are normal, once the stopping of the inverter is found, and the stopping time is longer than T1, on one hand, sending a start signal to a power valve of the inverter to enable the inverter to be started automatically, and on the other hand, sending a connection signal to enable the photovoltaic inverter and a public supply network to be switched on; stopping sending the start signal and the connection signal if the restart time is greater than N. The method has the benefits that the a control system tries to detect parameters which cannot be detected while the inverter is turned off under a starting up state so as to realize the auto-starting of the inverter, and auto-starting of the inverter cannot be realized after the inverter is restarted by a certain time, so that unnecessary stopping of the inverter which is caused by interference on the inverter can be reduced.

Description

The self-starting control method of photovoltaic DC-to-AC converter

Technical field

The present invention relates to power grid control field, relate in particular to the self-starting control method of photovoltaic DC-to-AC converter.

Background technology

In recent years, the regenerative resource such as wind energy, the solar energy technology of generating electricity by way of merging two or more grid systems becomes study hotspot.Combining inverter, as the interface equipment of renewable energy system and electrical network, plays an important role.Photovoltaic DC-to-AC converter is the key equipment of solar photovoltaic generation system, and it the direct current too can photovoltaic battery array producing is provided to meet alternating current that power grid quality requires and provide when to ground user and electrical network.

In high-power photovoltaic inverter running, owing to there is the problem of the extraneous unstable and sample circuit accuracy of some disturbing factors, electrical network own, it is wrong can causing the parameter sampling, and with this, may cause unnecessary shutdown.At photovoltaic DC-to-AC converter, do not exist under the damaged condition on hardware, above sample error is small probability event, if restart again machine, machine may will normally move down always.If shut down, will reduce generating efficiency always.

Summary of the invention

The technical problem to be solved in the present invention is can not autoboot after existing photovoltaic DC-to-AC converter mistake is shut down, and reduces generating efficiency, and a kind of self-starting control method of photovoltaic DC-to-AC converter is provided for this reason.

Technical scheme of the present invention is the self-starting control method of photovoltaic DC-to-AC converter; it comprises voltage, electric current and temperature parameter sampling to photovoltaic DC-to-AC converter; if find, voltage, electric current and temperature parameter normally continue sampling; when inverter is shut down and downtime surpasses T1 if find, send on the one hand enabling signal and to the power tube of inverter, it is restarted, send on the other hand and connect signal photovoltaic DC-to-AC converter and public electric wire net are connected.When the number of times restarting surpasses N, stop sending enabling signal and be connected signal.

T1 described in such scheme is 3-5min, and N is 2-4 time.

The invention has the beneficial effects as follows that control system started shooting and detected the electric current can not detect and the self-starting that drives the parameters such as overcurrent to realize machine started shooting under cut-off condition by trial; and restart no longer self-starting start after certain number of times, the unnecessary shutdown causing because being interfered to reduce machine.

Accompanying drawing explanation

Fig. 1 is that the present invention forms schematic diagram;

Fig. 2 is schematic flow sheet of the present invention.

Embodiment

Below in conjunction with accompanying drawing, the present invention will be further described.

As shown in Figure 2, the present invention utilizes photovoltaic inverter control system to realize the monitoring to photovoltaic DC-to-AC converter, first photovoltaic inverter control system is connect to electric initialization, comprise the stable of its internal system time clock, the initialization of peripheral interface, then the running status of photovoltaic DC-to-AC converter is monitored, and voltage, electric current and temperature parameter are sampled, through DSP, carried out internal conversion and processing.If data exception, inverter has occurred that in the process of operation fault needs to shut down, and when inverter surpasses the time T 1 of setting downtime, photovoltaic inverter control system is given an order and made photovoltaic DC-to-AC converter restart start; When inverter is restarted the times N that number of times surpass to set, no longer booting wait maintenance of inverter;

Embodiment 1: after photovoltaic inverter control system power-up initializing, the voltage of photovoltaic DC-to-AC converter, electric current and temperature parameter are carried out to sampling analysis, when inverter causes control system to be identified as fault due to glitch or extraneous bursty interference, photovoltaic DC-to-AC converter quits work, and is connected disconnection with the switch of public electric wire net.Photovoltaic inverter control system detects the voltage of photovoltaic DC-to-AC converter, electric current and temperature parameter are abnormal, trigger the monitoring timing of photovoltaic inverter control system to downtime, when finding to surpass downtime after 3min, photovoltaic inverter control system judgement is restarted number of times and whether is surpassed 2 times (comprising 2 times), if not over 2 times, sending on the one hand signal starts the power tube of inverter, sending on the other hand signal makes the switch of photovoltaic DC-to-AC converter and public electric wire net closed, if super: 2 times, do not process, make photovoltaic DC-to-AC converter keep stopped status, wait for maintenance overhaul.

Embodiment 2: after photovoltaic inverter control system power-up initializing, the voltage of photovoltaic DC-to-AC converter, electric current and temperature parameter are carried out to sampling analysis, when inverter causes control system to be identified as fault due to glitch or extraneous bursty interference, photovoltaic DC-to-AC converter quits work, and is connected disconnection with the switch of public electric wire net.Photovoltaic inverter control system detects the voltage of photovoltaic DC-to-AC converter, electric current and temperature parameter are abnormal, trigger the monitoring timing of photovoltaic inverter control system to downtime, when finding to surpass downtime after 5min, photovoltaic inverter control system judgement is restarted number of times and whether is surpassed 4 times (comprising 4 times), if not over 4 times, sending on the one hand signal starts the power tube of inverter, sending on the other hand signal makes the switch of photovoltaic DC-to-AC converter and public electric wire net closed, if super: 4 times, do not process, make photovoltaic DC-to-AC converter keep stopped status, wait for maintenance overhaul, complete once circulation.

As shown in Figure 1, control system comprises photovoltaic generating system data sampling module, photovoltaic inverter control system and photovoltaic generating system contactor action module, photovoltaic generating system comprises PV, DC/AC inverter bridge, Three-phase electric-wave filter, contactor and public electric wire net, photovoltaic generating system data sampling module is responsible for the parameter of photovoltaic generating system as voltage by 3 tunnel sample line, electric current and temperature sampling are also collected and are gathered to photovoltaic inverter control system, the multi-channel sampling line that more sampling parameter is corresponding can certainly be set, photovoltaic inverter control system is to the data analysis gathering, judgement, if finding photovoltaic generating system shuts down, judge and whether surpass 3-5min downtime, the words photovoltaic inverter control system that is sends signal by I/O interface on the one hand makes it restart and count restarting number of times to the photovoltaic DC-to-AC converter of photovoltaic generating system, sending on the other hand signal makes contactor closed, if restart number of times, surpass 2-4 time, do not carry out reboot operation.

By reference to the accompanying drawings the present invention is exemplarily described above; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving, design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention.

Claims (2)

1. the self-starting control method of photovoltaic DC-to-AC converter; it is characterized in that it comprises voltage, electric current and the temperature parameter sampling to photovoltaic DC-to-AC converter; if find, voltage, electric current and temperature parameter normally continue sampling; when inverter is shut down and downtime surpasses T1 if find, sending on the one hand enabling signal restarts it to the power tube of inverter; sending on the other hand connection signal connects photovoltaic DC-to-AC converter and public electric wire net; when the number of times restarting surpasses N, stop sending enabling signal and be connected signal.
2. the self-starting control method of photovoltaic DC-to-AC converter as claimed in claim 1, is characterized in that described T1 is 3-5min, and N is 2-4 time.
CN201410320614.8A 2014-07-08 2014-07-08 Auto-starting control method for photovoltaic inverter CN104158394A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410320614.8A CN104158394A (en) 2014-07-08 2014-07-08 Auto-starting control method for photovoltaic inverter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410320614.8A CN104158394A (en) 2014-07-08 2014-07-08 Auto-starting control method for photovoltaic inverter

Publications (1)

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CN104158394A true CN104158394A (en) 2014-11-19

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016126636A1 (en) * 2015-02-02 2016-08-11 Technology Research, Llc Interface for renewable energy system
US9564756B2 (en) 2013-03-15 2017-02-07 Technology Research, Llc Interface for renewable energy system
CN106711953A (en) * 2016-12-14 2017-05-24 北京天诚同创电气有限公司 Protection device and protection method for short-circuiting at direct current side of photovoltaic inverter
CN107294367A (en) * 2016-04-13 2017-10-24 新巨企业股份有限公司 Avoid the method that power supply unit repeatedly restarts
CN107290604A (en) * 2016-04-13 2017-10-24 新巨企业股份有限公司 The damage confirmation method of redundance type power system
US10523117B2 (en) 2017-11-07 2019-12-31 Southwire Company, Llc Dead band direct current converter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120147637A1 (en) * 2010-12-13 2012-06-14 Northern Power Systems, Inc. Methods, Systems, and Software for Controlling a Power Converter During Low (Zero)-Voltage Ride-Through Conditions
CN103375874A (en) * 2012-04-23 2013-10-30 珠海格力电器股份有限公司 Air conditioner and refrigerant circulation abnormality protection control method for same
CN103516240A (en) * 2012-06-20 2014-01-15 控制技术有限公司 Method and system for managing recovery of control in electrical circuit event of electrical equipment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120147637A1 (en) * 2010-12-13 2012-06-14 Northern Power Systems, Inc. Methods, Systems, and Software for Controlling a Power Converter During Low (Zero)-Voltage Ride-Through Conditions
CN103375874A (en) * 2012-04-23 2013-10-30 珠海格力电器股份有限公司 Air conditioner and refrigerant circulation abnormality protection control method for same
CN103516240A (en) * 2012-06-20 2014-01-15 控制技术有限公司 Method and system for managing recovery of control in electrical circuit event of electrical equipment

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
周建: "MMC-HVDC故障分析和保护策略研究", 《中国优秀硕士学位论文全文数据库工程科技II辑》 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9564756B2 (en) 2013-03-15 2017-02-07 Technology Research, Llc Interface for renewable energy system
US10193346B2 (en) 2013-03-15 2019-01-29 Technology Research, Llc Interface for renewable energy system
WO2016126636A1 (en) * 2015-02-02 2016-08-11 Technology Research, Llc Interface for renewable energy system
GB2550818A (en) * 2015-02-02 2017-11-29 Tech Research Llc Interface for renewable energy system
US9876360B2 (en) 2015-02-02 2018-01-23 Technology Research, Llc Interface for renewable energy system
CN107294367A (en) * 2016-04-13 2017-10-24 新巨企业股份有限公司 Avoid the method that power supply unit repeatedly restarts
CN107290604A (en) * 2016-04-13 2017-10-24 新巨企业股份有限公司 The damage confirmation method of redundance type power system
CN106711953A (en) * 2016-12-14 2017-05-24 北京天诚同创电气有限公司 Protection device and protection method for short-circuiting at direct current side of photovoltaic inverter
US10523117B2 (en) 2017-11-07 2019-12-31 Southwire Company, Llc Dead band direct current converter

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Application publication date: 20141119