CN104135073A - Distributed solar grid-connected control box and control method - Google Patents

Distributed solar grid-connected control box and control method Download PDF

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Publication number
CN104135073A
CN104135073A CN201410339649.6A CN201410339649A CN104135073A CN 104135073 A CN104135073 A CN 104135073A CN 201410339649 A CN201410339649 A CN 201410339649A CN 104135073 A CN104135073 A CN 104135073A
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CN
China
Prior art keywords
computer processor
voltage value
operating mechanism
electrical network
state
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CN201410339649.6A
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Chinese (zh)
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CN104135073B (en
Inventor
谢翠斌
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TAIXING HUACHENG ELECTROMECHANICAL MANUFACTURING CO LTD
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TAIXING HUACHENG ELECTROMECHANICAL MANUFACTURING CO LTD
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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
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS 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
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
    • Y04S10/123—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving renewable energy sources
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS 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
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/40—Display of information, e.g. of data or controls

Abstract

The invention relates to a distributed solar grid-connected control box and a control method. The control box is connected between a solar inverter and a grid, and comprises a breaker, an electrically operated mechanism, an undervoltage tripper, an AC/DC (Alternating Current/Direct Current) switching power supply, a watt hour meter, a computer processor and a display screen; the solar inverter is connected with the breaker; the breaker is connected with the electrically operated mechanism, the undervoltage tripper, the AC/DC switching power supply, the watt hour meter and the computer processor respectively; the watt hour meter is connected with the grid; the undervoltage tripper is connected with an undervoltage coil in the breaker; and the watt hour meter, the display screen, the electrically operated mechanism and the AC/DC switching power supply are connected with the computer processor. According to the control box and the control method, voltage of power generation and voltage of the grid can be monitored in real time; on-off of power on the grid for a grid-connected power generation user can be controlled; and safe use of a power generation system can be ensured.

Description

The grid-connected control cabinet of a kind of distributed solar energy and control method
Technical field
The present invention relates to solar energy utilization of new energy resources field, is the grid-connected control cabinet of a kind of distributed solar energy and control method specifically.
Background technology
Solar energy power generating is to rely on solar module, utilizes the electronics property of semi-conducting material, and light energy conversion is become to electric energy.Grid-connected system becomes receive the solar radiation energy coming into high voltage direct current by photovoltaic array after high-frequency direct-current is changed, through the backward electrical network output of inverter inversion and the simple sinusoidal alternating current of line voltage with frequency, homophase.Grid-connected photovoltaic system is exactly that solar photovoltaic generation system is connected with conventional electrical network, shared power supply task.The DC inverter that inverter is sent out photovoltaic system becomes sinusoidal ac, and the alternating current of generation can directly be supplied with AC load, then by remaining electric energy input electrical network, or directly the whole electric energy that produce is connected to the grid.Because the generating source of difference network users is different, if access in a large number the uneven power supply of the quality of power supply in electrical network, may cause voltage ripple of power network, voltage deviation etc., produce thus line voltage fluctuation by a relatively large margin on load voltage value, easily cause the feedback to consumer networks, cause the damage of user's generating equipment.
Summary of the invention
For above-mentioned deficiency of the prior art, the invention provides and a kind ofly can monitor in real time generating voltage and line voltage, control the break-make that the user of generating electricity by way of merging two or more grid systems powers on to electrical network, guarantee the grid-connected control cabinet of distributed solar energy and the control method of electricity generation system safe handling.
The technical solution used in the present invention is: the grid-connected control cabinet of a kind of distributed solar energy, control cabinet is connected between solar inverter and electrical network, it is characterized in that: described control cabinet comprises circuit breaker, motor-operating mechanism, device for under-voltage releasing equipment, AC/DC Switching Power Supply, kilowatt-hour meter, computer processor and display screen, solar inverter connecting breaker, circuit breaker connects respectively motor-operating mechanism, device for under-voltage releasing equipment, AC/DC Switching Power Supply, kilowatt-hour meter and computer processor, kilowatt-hour meter is connected to electrical network, under-voltage coil in device for under-voltage releasing equipment connecting breaker, kilowatt-hour meter, display screen, motor-operating mechanism is connected computer processor with AC/DC Switching Power Supply.
Further, described display screen is long-range and/or short range touch operation display screen, and display screen connects motor-operating mechanism.
Further, described motor-operating mechanism is the adaptive switched motor-operating mechanism of hand.
A control method for the grid-connected control cabinet of distributed solar energy, control method is:
A. electrical network powers on first, breaker closing, computer processor by AC/DC Switching Power Supply obtain electric after, first detection display screen, kilowatt-hour meter and the communication state between it, after these two kinds of equipment and computer processor communication are normal, when computer processor reads watt-hour meter voltage value by communication and read the state of circuit breaker, computer processor judges that whether line voltage value is at electrical network load voltage value, in the time of in 80%-120% in line voltage value in electrical network load voltage value, circuit breaker will keep original state; In line voltage value, in below 80% or when 120% is above of electrical network load voltage value, computer processor trips control circuit breaker;
B. and network process in, in the time of in the 80%-85% of computer processor judgement line voltage value in electrical network load voltage value or 115%-120%, circuit breaker will keep original state, in the time of in the 85%-115% of computer processor judgement line voltage value in electrical network load voltage value, computer processor reads the state of motor-operating mechanism, if be in gate-dividing state at auto state and circuit breaker, computer processor is controlled electric operating mechanism of circuit-breaker by time delay 1s and is closed a floodgate and show; If motor-operating mechanism is when artificial state, computer processor reading displayed screen state, realizes nearly control and/or control far away is carried out long-range splitting or integrating lock show state to circuit breaker.
Adopt technique scheme, the invention has the beneficial effects as follows: electrical network powers on first, detect the electric situation that obtains of each parts, and when powering on, detect generating voltage and line voltage, at voltage ripple of power network or when under-voltage, select to control device for under-voltage releasing equipment by computer processor and via under-voltage coil and/or motor-operating mechanism, realize the sub-switching operation of circuit breaker, effectively avoid the damage to generating user, guarantee system safety use.
Accompanying drawing explanation
Fig. 1 is structure diagram of the present invention.
In figure: solar inverter 1, electrical network 2, circuit breaker 3, motor-operating mechanism 4, device for under-voltage releasing equipment 5, AC/DC Switching Power Supply 6, kilowatt-hour meter 7, computer processor 8, display screen 9.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Shown in Fig. 1, the grid-connected control cabinet of a kind of distributed solar energy is connected between solar inverter 1 and electrical network 2, and control cabinet comprises circuit breaker 3, motor-operating mechanism 4, device for under-voltage releasing equipment 5, AC/DC Switching Power Supply 6, kilowatt-hour meter 7, computer processor 8, display screen 9.Solar inverter 1 connecting breaker 3, circuit breaker 3 connects respectively motor-operating mechanism 4, device for under-voltage releasing equipment 5, AC/DC Switching Power Supply 6, kilowatt-hour meter 7 and computer processor 8, kilowatt-hour meter 7 is connected to electrical network 2, the interior under-voltage coil of device for under-voltage releasing equipment 5 connecting breaker 3, kilowatt-hour meter 7, display screen 9, motor-operating mechanism 4 and AC/DC Switching Power Supply 6 are connected computer processor 8, display screen is long-range and/or short range touch operation display screen, and display screen connects motor-operating mechanism.Motor-operating mechanism is the adaptive switched motor-operating mechanism of hand.
The control method of control cabinet is:
A. electrical network powers on first, breaker closing, computer processor by AC/DC Switching Power Supply obtain electric after, first detection display screen, kilowatt-hour meter and the communication state between it, after these two kinds of equipment and computer processor communication are normal, when computer processor reads watt-hour meter voltage value by communication and read the state of circuit breaker, computer processor judges that whether line voltage value is at electrical network load voltage value, in the time of in 80%-120% in line voltage value in electrical network load voltage value, circuit breaker will keep original state; In line voltage value, in below 80% or when 120% is above of electrical network load voltage value, computer processor trips control circuit breaker;
B. and network process in, in the time of in the 80%-85% of computer processor judgement line voltage value in electrical network load voltage value or 115%-120%, circuit breaker will keep original state, in the time of in the 85%-115% of computer processor judgement line voltage value in electrical network load voltage value, computer processor reads the state of motor-operating mechanism, if be in gate-dividing state at auto state and circuit breaker, computer processor is controlled electric operating mechanism of circuit-breaker by time delay 1s and is closed a floodgate and show; If motor-operating mechanism is when artificial state, computer processor reading displayed screen state, realizes nearly control and/or control far away is carried out long-range splitting or integrating lock show state to circuit breaker.

Claims (4)

1. the grid-connected control cabinet of distributed solar energy, control cabinet is connected between solar inverter and electrical network, it is characterized in that: described control cabinet comprises circuit breaker, motor-operating mechanism, device for under-voltage releasing equipment, AC/DC Switching Power Supply, kilowatt-hour meter, computer processor and display screen, solar inverter connecting breaker, circuit breaker connects respectively motor-operating mechanism, device for under-voltage releasing equipment, AC/DC Switching Power Supply, kilowatt-hour meter and computer processor, kilowatt-hour meter is connected to electrical network, under-voltage coil in device for under-voltage releasing equipment connecting breaker, kilowatt-hour meter, display screen, motor-operating mechanism is connected computer processor with AC/DC Switching Power Supply.
2. the grid-connected control cabinet of a kind of distributed solar energy according to claim 1, is characterized in that: described display screen is long-range and/or short range touch operation display screen, and display screen connects motor-operating mechanism.
3. the grid-connected control cabinet of a kind of distributed solar energy according to claim 1 and 2, is characterized in that: described motor-operating mechanism is the adaptive switched motor-operating mechanism of hand.
4. the control method of the grid-connected control cabinet of distributed solar energy, control method is: electrical network powers on first, after breaker closing, computer processor by AC/DC Switching Power Supply obtain electric after first detection display shield, kilowatt-hour meter and the communication state between it, after these two kinds of equipment and computer processor communication normally, when computer processor reads the magnitude of voltage of kilowatt-hour meter by communication and read the state of circuit breaker, computer processor judges that whether line voltage value is at electrical network load voltage value, in the time of in 80%-120% in line voltage value in electrical network load voltage value, circuit breaker will keep original state, in line voltage value, in below 80% or when 120% is above of electrical network load voltage value, computer processor trips control circuit breaker, and in network process, in the time of in the 80%-85% of computer processor judgement line voltage value in electrical network load voltage value or 115%-120%, circuit breaker will keep original state, in the time of in the 85%-115% of computer processor judgement line voltage value in electrical network load voltage value, computer processor reads the state of motor-operating mechanism, if be in gate-dividing state at auto state and circuit breaker, computer processor is controlled electric operating mechanism of circuit-breaker by time delay 1s and is closed a floodgate and show, if motor-operating mechanism is when artificial state, computer processor reading displayed screen state, realizes nearly control and/or control far away is carried out long-range splitting or integrating lock show state to circuit breaker.
CN201410339649.6A 2014-07-17 2014-07-17 A kind of distributed solar energy cutting-in control case and control method Active CN104135073B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104135029A (en) * 2014-07-17 2014-11-05 泰兴市华诚机电制造有限公司 Distributed solar grid-connected control box
CN104410100A (en) * 2014-11-11 2015-03-11 国家电网公司 Distributive photovoltaic generating grid-connected smart black box and application thereof

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08126206A (en) * 1994-10-28 1996-05-17 Kyocera Corp Power supply device
US20090189445A1 (en) * 2008-01-24 2009-07-30 Renewable Energy Holdings, Llc Renewable energy management and storage system
CN102545087A (en) * 2012-01-12 2012-07-04 天津市电力公司 Multifunctional power distribution cabinet special for microgrid system
CN102867712A (en) * 2011-05-20 2013-01-09 中环光伏系统有限公司 Breaker for solar cell component string and protecting method
CN103178542A (en) * 2013-03-12 2013-06-26 南京南瑞太阳能科技有限公司 Distributed power grid-connection interface system and control method thereof
CN103595348A (en) * 2013-11-19 2014-02-19 安泰科技股份有限公司 Household photovoltaic intelligent control system
CN203660549U (en) * 2013-09-17 2014-06-18 北京北变微电网技术有限公司 Distributed photovoltaic intelligent grid connection box
CN204118758U (en) * 2014-07-17 2015-01-21 泰兴市华诚机电制造有限公司 A kind of distributed solar energy cutting-in control case

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08126206A (en) * 1994-10-28 1996-05-17 Kyocera Corp Power supply device
US20090189445A1 (en) * 2008-01-24 2009-07-30 Renewable Energy Holdings, Llc Renewable energy management and storage system
CN102867712A (en) * 2011-05-20 2013-01-09 中环光伏系统有限公司 Breaker for solar cell component string and protecting method
CN102545087A (en) * 2012-01-12 2012-07-04 天津市电力公司 Multifunctional power distribution cabinet special for microgrid system
CN103178542A (en) * 2013-03-12 2013-06-26 南京南瑞太阳能科技有限公司 Distributed power grid-connection interface system and control method thereof
CN203660549U (en) * 2013-09-17 2014-06-18 北京北变微电网技术有限公司 Distributed photovoltaic intelligent grid connection box
CN103595348A (en) * 2013-11-19 2014-02-19 安泰科技股份有限公司 Household photovoltaic intelligent control system
CN204118758U (en) * 2014-07-17 2015-01-21 泰兴市华诚机电制造有限公司 A kind of distributed solar energy cutting-in control case

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104135029A (en) * 2014-07-17 2014-11-05 泰兴市华诚机电制造有限公司 Distributed solar grid-connected control box
CN104410100A (en) * 2014-11-11 2015-03-11 国家电网公司 Distributive photovoltaic generating grid-connected smart black box and application thereof

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