CN104113133B - Intelligent photovoltaic off-network inverter system and power consumption control method thereof - Google Patents

Intelligent photovoltaic off-network inverter system and power consumption control method thereof Download PDF

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Publication number
CN104113133B
CN104113133B CN201410308017.3A CN201410308017A CN104113133B CN 104113133 B CN104113133 B CN 104113133B CN 201410308017 A CN201410308017 A CN 201410308017A CN 104113133 B CN104113133 B CN 104113133B
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commutator
inverter
solar
load
power
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CN104113133A (en
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贾芳
宋清华
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Guangdong East Power Co Ltd
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Guangdong East Power Co Ltd
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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
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00Integration of renewable energy sources in buildings
    • Y02B10/70Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • 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
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • 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
    • 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20End-user application control systems

Abstract

The present invention relates to photovoltaic DC-to-AC converter technical field, specifically disclose a kind of Intelligent photovoltaic off-network inverter system and power consumption control method thereof, Intelligent photovoltaic off-network inverter system includes inverter, commutator, controller for solar and accumulator, described rectifier input alternating current power supply connects, outfan is connected with the input of described inverter, described inverter output end is connected with described load, described controller for solar input is connected with solar panel, and outfan is connected with accumulator and inverter;Control method is in the pattern of using electricity in off-peak hours, conversion between AC charging pass pattern and normal mode by the demand of user, also ensures that user's not power-off when city's electrical anomaly.The present invention has and ensures not power-off, and electric energy high efficiency uses, and reduces user power utilization cost, advantage easy to use.

Description

Intelligent photovoltaic off-network inverter system and power consumption control method thereof
Technical field
The present invention relates to photovoltaic DC-to-AC converter technical field, particularly relate to a kind of Intelligent photovoltaic off-network inverter system and power consumption control method thereof.
Background technology
Existing most of photovoltaic off-grid inverters do not have the control of too many intelligence, are all that the mode as a kind of uninterrupted power source is done, do not stand in economy and the practicality considering user in the position of user.And a lot of countries are in the different time periods, and the standard of the charge of electricity is the most different, and peak times of power consumption, the electric lighting bill is heavy, and the cost that user undertakes increases.Current photovoltaic off-grid inverter is only as the uninterrupted power supply of guarantee power supply, but can not switch different use power modes according to user's request, reduces its electric cost.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of Intelligent photovoltaic off-network inverter system, its can in different time sections according to user's request with different mode operations, it is ensured that not power-off, electric energy high efficiency uses, and reduces user power utilization cost, easy to use.
The present invention also provides for a kind of power consumption control method.
For achieving the above object, the technical solution adopted in the present invention is:
A kind of Intelligent photovoltaic off-network inverter system, it includes inverter, commutator, controller for solar and accumulator, described rectifier input alternating current power supply connects, outfan is connected with the input of described inverter, described inverter output end is connected with described load, described controller for solar input is connected with solar panel, and outfan is connected with accumulator and inverter.
Being improved to further technique scheme, the outfan of described inverter connects a transformator, and one end of described transformator connects STS, and one end of described STS connects load, and the other end connects network intelligence switch.
Being improved to further technique scheme, the outfan of described controller for solar connects the first current transformer, and the first current transformer connects the input of inverter.
Being improved to further technique scheme, the outfan of described accumulator connects soft module of direct current, and the outfan of soft module of direct current connects the second current transformer, and the second current transformer connects the input of described inverter.
Being improved to further technique scheme, the outfan of a described commutator in parallel capacitor each with the input of described inverter.
A kind of power consumption control method of Intelligent photovoltaic off-network inverter system, the pattern comprising: use electricity in off-peak hours: gather controller for solar and the voltage of commutator output, when the output voltage of controller for solar is higher than the output voltage of commutator, Intelligent photovoltaic off-network inverter system controls by solar panel powering load together with accumulator;Gather the output voltage of accumulator simultaneously, when collecting accumulator and low pressure occurring, open commutator, by solar panel powering load together with commutator;AC charging pass pattern: when storage battery low-voltage, Intelligent photovoltaic off-network inverter system controls by solar panel powering load together with commutator, and commutator does not charges the battery;Normal mode: by solar panel powering load together with commutator, charge the battery simultaneously all together;Civil power abnormal patterns: solar panel is powering load together with accumulator;Civil power and solar energy all abnormal patterns: accumulator passes through inverter powering load.
Preferably, use electricity in off-peak hours under pattern, as far as possible without the energy of electrical network described in, i.e. when the output of controller for solar is more than load power demand, solar panel preferentially meets load to inverter power supply, and unnecessary power charges a battery, and commutator is in resting state;When the output of controller for solar is less than load power demand, solar panel preferentially meets load to inverter power supply, and inadequate is supplemented by accumulator, and commutator is in resting state.
Preferably, under the pattern of described AC charging pass, commutator does not charges a battery, i.e. when the output of controller for solar is more than load power demand, solar panel preferentially meets load to inverter power supply, and unnecessary power charges a battery, and commutator is in resting state;When the output of controller for solar is less than load power demand, solar panel preferentially meets load to inverter power supply, and inadequate is supplemented by commutator, is controlled the output electric current of commutator by the second current transformer, commutator only supplements inadequate energy, does not charges the battery.
Preferably, under described normal mode, preferentially ensure batteries to store energy, i.e. when the output of controller for solar is more than load power demand, solar panel preferentially meets load to inverter power supply, and unnecessary power charges a battery, and commutator is in resting state;When the output of controller for solar is less than load power demand, solar panel powering load charging a battery together with commutator.
Intelligent photovoltaic off-network inverter system of the present invention and power consumption control method thereof, it has the beneficial effect that
Devise the photovoltaic off-grid inverter system of a set of intelligence, be in different operational modes in the different electricity consumption time periods and automatically switch, do not use the energy of electrical network in the Peak power use period as far as possible, greatly reduce the electric cost of user;Use the energy of solar panel simultaneously efficiently, decrease the waste of the energy, reach to save the purpose of the energy.When city's electrical anomaly, it is ensured that user's not power-off, meet the need for electricity of user, it is ensured that produce and be carried out continuously.
Accompanying drawing explanation
Fig. 1 is the system topological figure of embodiment of the present invention Intelligent photovoltaic off-network inverter system;
Fig. 2 is the schematic block circuit diagram of embodiment of the present invention Intelligent photovoltaic off-network inverter system;
Fig. 3 is the flow chart of embodiment of the present invention Intelligent photovoltaic off-network inverter system power consumption control method;
Fig. 4 is that use electricity in off-peak hours in embodiment of the present invention Intelligent photovoltaic off-network inverter system power consumption control method pattern, AC charging pass pattern and the electricity of normal mode flows to one of schematic diagram;
Fig. 5 is that use electricity in off-peak hours in the embodiment of the present invention Intelligent photovoltaic off-network inverter system power consumption control method electricity of pattern flows to the two of schematic diagram;
Fig. 6 is that in embodiment of the present invention Intelligent photovoltaic off-network inverter system power consumption control method, the electricity of AC charging pass pattern flows to the two of schematic diagram;
Fig. 7 is that in embodiment of the present invention Intelligent photovoltaic off-network inverter system power consumption control method, the electricity of normal mode flows to the two of schematic diagram;
Fig. 8 is that in embodiment of the present invention Intelligent photovoltaic off-network inverter system power consumption control method, the electricity of civil power and solar energy all abnormal patterns flows to schematic diagram.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is described in further detail.
Embodiment:
Refer to Fig. 1,2, Intelligent photovoltaic off-network inverter system of the present invention, it includes inverter, commutator, controller for solar MPPT and accumulator BAT, also include STS STS, transformator TRANS and network intelligence switch BYPASS(BYP), wherein, STS STS includes STS1 and STS2 of changeable use.
Rectifier input is connected with alternating current power supply (electrical network), rectifier output end is connected with the input of inverter, the outfan shnt capacitor C1 of commutator, the input of an inverter capacitor C2 in parallel, the outfan connection transformer TRANS of inverter, being connected with STS STS2 after the outfan of a transformator TRANS capacitor C3 in parallel, STS STS2 is connected with load LOAD, and STS STS1 is connected with network intelligence switch BYP.
Controller for solar MPPT input is connected with solar panel, and controller for solar MPPT outfan connects the first Current Transmit 1, and the first Current Transmit 1 outfan connects input and the accumulator of inverter.The outfan of accumulator connects the input of soft module of direct current, and the outfan of soft module of direct current connects the input of the second Current Transmit 2, and the outfan of the second Current Transmit 2 connects in the input of inverter.Because the electricity symbol of commutator, inverter and transformator is known, show with electricity symbol table the most in the drawings.
With reference to Fig. 3, the power consumption control method using above-mentioned Intelligent photovoltaic off-network inverter system is:
User can be set to each pattern following in different time sections, and the operation time according to setting changes the most between the various modes.
Use electricity in off-peak hours pattern: gather controller for solar MPPT and the voltage of commutator output, when the output voltage of controller for solar MPPT is higher than the output voltage of commutator, Intelligent photovoltaic off-network inverter system controls to be powered to load LOAD together with accumulator BAT by solar panel PV;Gather the output voltage of accumulator BAT simultaneously, when collecting accumulator BAT and low pressure occurring, open commutator, solar panel PV power to together with commutator load LOAD.
AC charging pass pattern: when accumulator BAT low pressure, Intelligent photovoltaic off-network inverter system controls to be powered to load LOAD together with commutator by solar panel PV, and commutator charges to accumulator BAT.
Normal mode: powered to together with commutator load LOAD by solar panel PV, charge to simultaneously all together accumulator BAT.
Civil power abnormal patterns: solar panel PV powering load together with accumulator BAT.
Civil power and solar energy all abnormal patterns: accumulator BAT powers to load LOAD by inverter.
Specifically: under the pattern of using electricity in off-peak hours, the effect of energy without electrical network as far as possible is reached.With reference to Fig. 4, i.e. when the output of controller for solar MPPT is more than load LOAD power demand, solar panel PV preferentially meets load LOAD to inverter power supply, and unnecessary power charges to accumulator BAT, and commutator is in resting state.Now solar panel PV power=bearing power+accumulator charge power.With reference to Fig. 5, when the output of controller for solar MPPT is less than load LOAD power demand, solar panel PV preferentially meets load LOAD to inverter power supply, and inadequate is supplemented by accumulator BAT, and commutator is in resting state.Now solar panel PV power+battery discharging power=bearing power.
Under the pattern of AC charging pass, commutator charges to accumulator BAT.With reference to Fig. 4, i.e. when the output of controller for solar MPPT is more than load LOAD power demand, solar panel PV preferentially meets load LOAD to inverter power supply, and unnecessary power charges to accumulator BAT, and commutator is in resting state;Now solar panel PV power=bearing power+accumulator charge power.With reference to Fig. 6, when the output of controller for solar MPPT is less than load LOAD power demand, solar panel PV preferentially meets load LOAD to inverter power supply, inadequate is supplemented by commutator, the output electric current of commutator is controlled by the second Current Transmit 2, commutator only supplements inadequate energy, charges to accumulator BAT.Now solar panel PV power+commutator output=bearing power
Under normal mode, preferential guarantee accumulator BAT energy storage.With reference to Fig. 4, i.e. when the output of controller for solar MPPT is more than load LOAD power demand, solar panel PV preferentially meets load LOAD to inverter power supply, and unnecessary power charges to accumulator BAT, and commutator is in resting state;Now solar panel PV power=bearing power+accumulator charge power.With reference to Fig. 7, when the output of controller for solar MPPT is less than load LOAD power demand, solar panel PV together with commutator powering load and give accumulator BAT charge, now solar panel PV power+commutator output=bearing power+battery discharging power.
Civil power abnormal patterns: solar panel PV powers to together with accumulator BAT load LOAD.When the energy of reference Fig. 5, i.e. solar energy is less than load LOAD, solar panel PV powers to together with accumulator BAT load LOAD, now solar panel PV power+battery discharging power=bearing power.
Civil power and solar energy all abnormal patterns: with reference to Fig. 8, accumulator BAT powers to load LOAD by inverter, now battery discharging power=bearing power.
By with upper type, user arranges different patterns in different time sections, can reduce electric cost, improves power consumption efficiency.
When whole system is in photovoltaic UPS pattern, power consumption control method ibid, i.e. includes the pattern of using electricity in off-peak hours, AC charging pass pattern, normal mode, civil power abnormal patterns and civil power and solar energy all abnormal patterns.
The above is the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.

Claims (4)

1. the power consumption control method of an Intelligent photovoltaic off-network inverter system, described Intelligent photovoltaic off-network inverter system includes inverter, commutator, controller for solar and accumulator, described rectifier input is connected with alternating current power supply, outfan is connected with the input of described inverter, described inverter output end is connected with load, described controller for solar input is connected with solar panel, and outfan is connected with accumulator and inverter;The outfan of described controller for solar connects the first current transformer, first current transformer connects the input of inverter, it is characterized in that: pattern of using electricity in off-peak hours: gather controller for solar and the voltage of commutator output, when the output voltage of controller for solar is higher than the output voltage of commutator, Intelligent photovoltaic off-network inverter system controls by solar panel powering load together with accumulator;Gather the output voltage of accumulator simultaneously, when collecting accumulator and low pressure occurring, open commutator, by solar panel powering load together with commutator;
AC charging pass pattern: when storage battery low-voltage, Intelligent photovoltaic off-network inverter system controls by solar panel powering load together with commutator, and commutator does not charges the battery;
Normal mode: by solar panel powering load together with commutator, charge the battery simultaneously all together;
Civil power abnormal patterns: solar panel is powering load together with accumulator;
Civil power and solar energy all abnormal patterns: accumulator passes through inverter powering load;
The outfan of described accumulator connects soft module of direct current, and the outfan of soft module of direct current connects the second current transformer, and the second current transformer connects the input of described inverter.
2. according to Intelligent photovoltaic off-network inverter system power consumption control method described in claim 1, it is characterized in that: described in use electricity in off-peak hours under pattern, as far as possible without the energy of electrical network, i.e. when the output of controller for solar is more than load power demand, solar panel preferentially meets load to inverter power supply, unnecessary power charges a battery, and commutator is in resting state;When the output of controller for solar is less than load power demand, solar panel preferentially meets load to inverter power supply, and inadequate is supplemented by accumulator, and commutator is in resting state.
Intelligent photovoltaic off-network inverter system power consumption control method the most according to claim 1, it is characterized in that: under the pattern of described AC charging pass, commutator does not charges a battery, i.e. when the output of controller for solar is more than load power demand, solar panel preferentially meets load to inverter power supply, unnecessary power charges a battery, and commutator is in resting state;When the output of controller for solar is less than load power demand, solar panel preferentially meets load to inverter power supply, and inadequate is supplemented by commutator, is controlled the output electric current of commutator by the second current transformer, commutator only supplements inadequate energy, does not charges the battery.
Intelligent photovoltaic off-network inverter system power consumption control method the most according to claim 1, it is characterized in that: under described normal mode, preferentially ensure batteries to store energy, i.e. when the output of controller for solar is more than load power demand, solar panel preferentially meets load to inverter power supply, unnecessary power charges a battery, and commutator is in resting state;When the output of controller for solar is less than load power demand, solar panel powering load charging a battery together with commutator.
CN201410308017.3A 2014-07-01 2014-07-01 Intelligent photovoltaic off-network inverter system and power consumption control method thereof Active CN104113133B (en)

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CN106410933B (en) * 2015-07-28 2019-04-26 广东爱迪贝克软件科技有限公司 Photovoltaic off-grid inverter control method and control device
CN105976544A (en) * 2016-06-29 2016-09-28 厦门日华科技股份有限公司 Emergency alarm device
CN107579590A (en) * 2016-07-05 2018-01-12 伊顿飞瑞慕品股份有限公司 Off-grid type uninterrupted power source
CN109030968B (en) * 2017-06-09 2021-02-23 中国电力科学研究院有限公司 Energy storage system grid-connection and off-grid test system and method
CN109960307B (en) * 2019-03-01 2021-06-22 湖南诺诚光伏能源有限公司 MPPT active disturbance rejection control method for photovoltaic off-grid inverter
CN109901659B (en) * 2019-03-01 2021-09-07 湖南诺诚光伏能源有限公司 Photovoltaic off-grid inverter MPPT control system
CN113193645B (en) * 2021-04-22 2022-08-09 四川荣创新能动力系统有限公司 Control method of hydrogen fuel cell emergency power supply system
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