CN111525889A - Solar photovoltaic power generation supply system - Google Patents

Solar photovoltaic power generation supply system Download PDF

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Publication number
CN111525889A
CN111525889A CN202010384903.XA CN202010384903A CN111525889A CN 111525889 A CN111525889 A CN 111525889A CN 202010384903 A CN202010384903 A CN 202010384903A CN 111525889 A CN111525889 A CN 111525889A
Authority
CN
China
Prior art keywords
current transformer
computer
power generation
supply system
data collector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010384903.XA
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Chinese (zh)
Inventor
常春
徐金涛
赵龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Lianwei New Energy Technology Co ltd
Original Assignee
Anhui Lianwei New Energy Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anhui Lianwei New Energy Technology Co ltd filed Critical Anhui Lianwei New Energy Technology Co ltd
Priority to CN202010384903.XA priority Critical patent/CN111525889A/en
Publication of CN111525889A publication Critical patent/CN111525889A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • H02H3/042—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned combined with means for locating the fault
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/34—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/30—Electrical components
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings 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
    • 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
    • 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
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
    • 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
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/128—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment involving the use of Internet protocol

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention relates to a solar photovoltaic power generation supply system which comprises a solar cell panel, an inverter, a combiner box, a data collector and a computer, wherein the solar cell panel is respectively connected with the combiner box and the data collector through the inverter, the output end of the data collector is connected with the computer, the computer is connected with a remote computer through the internet, the output end of the data collector is respectively connected with a temperature instrument and a radiation instrument, one end of the combiner box is connected with a low-voltage power grid through a power distribution cabinet, a leakage protection system is arranged between the power distribution cabinet and the low-voltage power grid, the leakage protection system comprises a transformer connected with a power supply, A, B, C phase lines are connected onto the transformer and are subjected to ground protection, A, B, C phase lines are connected with a current transformer through a first switch, and. Has the advantages that: the invention can carry out single phase line detection and integral three phase line detection and leakage protection in time, has strong safety performance and is convenient for popularization and application.

Description

Solar photovoltaic power generation supply system
Technical Field
The invention relates to the technical field of photovoltaic power generation systems, in particular to a solar photovoltaic power generation supply system.
Background
Photovoltaic power generation is a technology of directly converting light energy into electric energy by using the photovoltaic effect of a semiconductor interface. The solar energy power generation system mainly comprises a solar panel (assembly), a controller and an inverter, and the main components are electronic components. The solar cells are connected in series and then are packaged and protected to form a large-area solar cell module, and then the photovoltaic power generation device is formed by matching with components such as a power controller and the like.
The solar photovoltaic power supply process is mainly characterized in that light energy is converted into electric energy, the electric energy is conveyed to electrical equipment of residents through a circuit device, the existing device system does not record good data of the operation of the electrical equipment, such as current, voltage, the radioactivity of the surrounding environment, coefficients of the conversion rate of heat energy and the like, so that the regulation and the maintenance in the later period can be carried out, the circuit in the solar photovoltaic assembly is complex, when the electric leakage phenomenon occurs in the circuit, the warning or the maintenance operation can not be carried out timely, a large potential safety hazard exists, when the circuit fault occurs in a single line of a three-phase line, the circuit fault can not be automatically carried out, the safety of the system can be reduced, and the system maintenance is not facilitated.
Disclosure of Invention
The invention aims to provide a solar photovoltaic power generation supply system which is high in safety performance, can perform single-phase line detection and timely detection and leakage protection on an integral three-phase line, and is realized through the following scheme.
In order to achieve the above purpose, the invention adopts the technical scheme that: a solar photovoltaic power generation supply system comprises a solar panel, an inverter, a combiner box, a data collector and a computer, wherein the solar panel is respectively connected with the combiner box and the data collector through the inverter, and the output end of the data collector is connected with the computer;
the leakage protection system comprises a transformer connected with a power supply, wherein A, B, C three phase lines are connected on the transformer for ground protection, A, B, C three phase lines are connected with a current transformer through a first switch, the current transformer is connected with a fuse in series through a winding wire, one side of the current transformer is connected with corresponding A, B, C three phase lines through penetrating through the internal wire of the current transformer, one end of A, B, C three phase lines is connected with the current transformer through a second switch, the current transformer is connected with a bulb in series through an electromagnetic winding wire, one end of A phase line and one end of neutral line are connected with the current transformer through the second switch, the current transformer is connected with a bulb in series through an electromagnetic winding wire, one end of B phase line and one end of neutral line are connected with the current transformer through the second switch, and the current transformer is connected with a bulb in series, one end of the C-phase line and one end of the neutral line are connected with a current transformer through a second switch, and the current transformer is connected with a bulb in series through an electromagnetic winding wire.
Furthermore, the A, B, C phase lines jointly penetrate through the current transformer and are connected with a voltage source, and one end of the voltage source is protected by grounding.
Furthermore, a circuit breaker connected with the inverter is arranged at one output end of the solar cell panel.
Furthermore, an electric meter connected with a computer is arranged on the power distribution cabinet.
Furthermore, the collection flow box is provided with a current condenser connected with the inverter and the power distribution cabinet.
The invention has the technical effects that: the inverter converts the direct current electric energy absorbed by the solar panel into constant frequency and constant voltage alternating current, the data acquisition unit can transmit the temperature, the radioactivity, the electric quantity use condition and various parameter information of the surrounding environment to the computer, and then the information is transmitted to the remote computer through the internet, so as to be convenient for regulation and control, and the junction box connected with the power distribution cabinet can ensure the orderly connection and junction functions of the photovoltaic modules, then, the electric energy is effectively transmitted through the power distribution cabinet, and the electric leakage protection system connected with the power distribution cabinet detects circuit fault points in time mainly through the principle of 'residual current action', can detect a single phase line, and when a fault occurs, the bulb connected with the solar photovoltaic power generation supply system is high in safety performance due to the fact that the relay acts and sends signals due to residual current, single-phase lines can be conducted, and timely detection and electric leakage protection can be conducted on the whole three-phase lines.
Drawings
FIG. 1 is a schematic structural diagram of a solar photovoltaic power generation supply system according to the present invention;
FIG. 2 is a schematic diagram of an earth leakage protection system according to the present invention;
fig. 3 is a schematic diagram of the current transformer connection of the present invention.
Reference numerals: 1-a solar panel; 2-an inverter; 3-a combiner box; 4-a data collector; 5-a computer; 6-a remote computer; 7-a temperature instrument; 8-a radiometer; 9-a power distribution cabinet; 10-low voltage network; 11-earth leakage protection system.
Detailed Description
Referring to the attached drawings 1-3, a solar photovoltaic power generation supply system comprises a solar cell panel 1, an inverter 2, a combiner box 3, a data collector 4 and a computer 5, wherein the solar cell panel 1 is respectively connected with the combiner box 3 and the data collector 4 through the inverter 2, the output end of the data collector 4 is connected with the computer 5, the computer 5 is connected with a remote computer 6 through the internet, the output end of the data collector 4 is respectively connected with a temperature instrument 7 and a radiation instrument 8, one end of the combiner box 3 is connected with a low-voltage power grid 10 through a power distribution cabinet 9, and a leakage protection system is arranged between the power distribution cabinet 9 and the low-voltage power grid 10;
the leakage protection system comprises a transformer connected with a power supply, wherein A, B, C three phase lines are connected on the transformer for ground protection, A, B, C three phase lines are connected with a current transformer through a first switch, the current transformer is connected with a fuse in series through a winding wire, one side of the current transformer is connected with corresponding A, B, C three phase lines through penetrating through the internal wire of the current transformer, one end of A, B, C three phase lines is connected with the current transformer through a second switch, the current transformer is connected with a bulb in series through an electromagnetic winding wire, one end of A phase line and one end of neutral line are connected with the current transformer through the second switch, the current transformer is connected with a bulb in series through an electromagnetic winding wire, one end of B phase line and one end of neutral line are connected with the current transformer through the second switch, and the current transformer is connected with a bulb in series, c phase line and neutral wire one end are connected with current transformer through the second switch, current transformer has the bulb through electromagnetic winding wire series connection, A, B, C three phase lines pass current transformer jointly and are connected with the voltage source, ground protection is carried out to voltage source one end.
The specific embodiment of this scheme is, when two wires pass current transformer, normally, the current algebraic sum of two wires is zero, the magnetic flux offsets each other, current transformer secondary side current is zero, therefore, winding connection's ampere meter can not show, when the inside circuit fault that produces of equipment or to ground dielectric breakdown, the shell is electrified, power one end is through the shell, ground return circuit, the current algebraic sum of two wires is not zero, when "surplus" current phenomenon appears in the current transformer, the magnetic flux is connected to the secondary side for the relay takes place the action, produce the signal, thereby carry out automatically regulated, safety protection's effect.
The specific embodiment of this scheme is, through "residual current action" principle, will A, B, C wherein single phase line or a plurality of phase lines cooperate current transformer to detect, can carry out circuit protection through fuse or relay when overvoltage condition or circuit fault appear.
The specific embodiment of this scheme does, 1 output end of solar cell panel is equipped with the circuit breaker that is connected with dc-to-ac converter 2, be equipped with the ammeter that is connected with computer 5 on the switch board 9, be equipped with the accumulator that is connected with dc-to-ac converter 2 and switch board 9 on the collection flow box 3, the user's power consumption condition can be timely reacted to the ammeter that sets up in the system, and the electric energy of solar cell panel conversion can be stored unnecessary electric quantity through the accumulator when not using completely.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (5)

1. A solar photovoltaic power generation supply system comprises a solar cell panel (1), an inverter (2), a combiner box (3), a data collector (4) and a computer (5), wherein the solar cell panel (1) is respectively connected with the combiner box (3) and the data collector (4) through the inverter (2), the output end of the data collector (4) is connected with the computer (5), the solar photovoltaic power generation supply system is characterized in that the computer (5) is connected with a remote computer (6) through the Internet, the output end of the data collector (4) is respectively connected with a temperature instrument (7) and a radiometer (8), one end of the combiner box (3) is connected with a low-voltage power grid (10) through a power distribution cabinet (9), and a leakage protection system (11) is arranged between the power distribution cabinet (9) and the low-voltage power grid (10);
the leakage protection system (11) comprises a transformer connected with a power supply, wherein A, B, C three phase lines are connected on the transformer for ground protection, A, B, C three phase lines are connected with a current transformer through a first switch, a fuse is connected in series with the current transformer through a winding wire, one side of the current transformer is connected with corresponding A, B, C three phase lines through penetrating through the internal wire of the current transformer, one end of A, B, C three phase lines is connected with the current transformer through a second switch, the current transformer is connected with a bulb through an electromagnetic winding wire in series, one end of A phase line and one end of neutral line are connected with the current transformer through the second switch, the current transformer is connected with a bulb through an electromagnetic winding wire in series, one end of B phase line and one end of neutral line are connected with the current transformer through the second switch, and the current transformer is connected with a bulb through an, one end of the C-phase line and one end of the neutral line are connected with a current transformer through a second switch, and the current transformer is connected with a bulb in series through an electromagnetic winding wire.
2. The solar photovoltaic power generation and supply system of claim 1, wherein the A, B, C phase lines commonly pass through a current transformer and are connected with a voltage source, and one end of the voltage source is protected by grounding.
3. The solar photovoltaic power generation and supply system according to the claim, wherein a circuit breaker connected with the inverter (2) is arranged at one output end of the solar panel (1).
4. The solar photovoltaic power generation supply system according to claim 1, wherein an electric meter connected with the computer (5) is arranged on the power distribution cabinet (9).
5. The solar photovoltaic power generation and supply system according to claim 1, wherein the combiner box (3) is provided with an electric accumulator connected with the inverter (2) and the power distribution cabinet (9).
CN202010384903.XA 2020-05-09 2020-05-09 Solar photovoltaic power generation supply system Pending CN111525889A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010384903.XA CN111525889A (en) 2020-05-09 2020-05-09 Solar photovoltaic power generation supply system

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Application Number Priority Date Filing Date Title
CN202010384903.XA CN111525889A (en) 2020-05-09 2020-05-09 Solar photovoltaic power generation supply system

Publications (1)

Publication Number Publication Date
CN111525889A true CN111525889A (en) 2020-08-11

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Country Status (1)

Country Link
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201666928U (en) * 2010-04-23 2010-12-08 王照晨 Matched test table of three-stage residual current operated protective device
CN202121212U (en) * 2011-07-05 2012-01-18 河口区供电公司 Circuit control device of low voltage power distribution cabinet
CN203759823U (en) * 2013-12-11 2014-08-06 厦门大恒科技有限公司 Intelligent residual current detection alarm device
CN108233414A (en) * 2018-01-12 2018-06-29 江苏华源新能源科技有限公司 The grid-connected system of solar photo-voltaic power generation station

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201666928U (en) * 2010-04-23 2010-12-08 王照晨 Matched test table of three-stage residual current operated protective device
CN202121212U (en) * 2011-07-05 2012-01-18 河口区供电公司 Circuit control device of low voltage power distribution cabinet
CN203759823U (en) * 2013-12-11 2014-08-06 厦门大恒科技有限公司 Intelligent residual current detection alarm device
CN108233414A (en) * 2018-01-12 2018-06-29 江苏华源新能源科技有限公司 The grid-connected system of solar photo-voltaic power generation station

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Application publication date: 20200811