CN115800033A - Control system of photovoltaic power station - Google Patents

Abstract

The invention discloses a control system of a photovoltaic power station in the technical field of photovoltaic power generation, which includes a control box, a distribution box and a solar battery group, and the distribution box is fixedly connected to the upper left corner of the rear side wall of the inner cavity of the control box by bolts , the upper right corner of the inner cavity rear side wall of the control box is fixedly connected with a confluence, and the upper side of the inner cavity rear side wall of the control box is fixedly connected with a DC load device on the left side of the confluence, the control The upper side of the rear side wall of the inner cavity of the box and the lower side of the DC loader are fixedly connected with an AC loader. The control system of the photovoltaic power station has a reasonable structural design and can complete power distribution without transfer. Transmission, reduce the energy consumption of power transmission, save more power resources, can improve the power distribution system of photovoltaic power stations, can clearly and detailed automatic control of power distribution, and has stronger functionality.

Description

A control system for a photovoltaic power station

technical field

The invention relates to the technical field of photovoltaic power generation, in particular to a control system of a photovoltaic power station.

Background technique

With the rapid development of photovoltaic power generation and the continuous increase of installed capacity, the penetration rate of photovoltaic power generation is getting higher and higher. The characteristics are different from conventional power generation methods. The intervention of a large number of photovoltaic power generation will inevitably affect the traditional power grid's power flow distribution, security and stability, power maintenance protection, reliable power supply, planning and design, dispatching operation, power quality and other aspects.

The control system of the existing photovoltaic power station can only supply power to the national grid alone. The national grid is used as a transfer station for power transmission, and the power is distributed to households or stored through the transfer station of the national grid. It cannot be directly distributed to Household electricity consumption or storage leads to energy consumption in the process of power transmission, resulting in waste of power resources, and the system structure of the existing photovoltaic power station is not perfect, there is no clear and detailed automatic system to control the distribution of power, functional Single, for this we propose a control system for photovoltaic power plants.

Contents of the invention

The purpose of the present invention is to provide a control system for a photovoltaic power station to solve the problem that the existing control system for a photovoltaic power station proposed in the above background technology can only supply power to the national grid alone, and the national grid is used as a relay for power transmission. Station, through the national grid transfer station, the power is distributed to household power consumption or storage, which cannot be directly distributed to household power consumption or storage, resulting in energy consumption in the process of power transmission, and the system structure of the existing photovoltaic power station is not enough Perfect question.

In order to achieve the above object, the present invention provides the following technical solution: a control system of a photovoltaic power station, including a control box, a distribution box and a solar cell group, and the distribution box is fixedly connected to the rear side of the inner cavity of the control box by bolts In the upper left corner of the wall, a confluence is fixedly connected to the upper right corner of the rear side wall of the inner cavity of the control box, and a DC load device is fixedly connected to the upper side of the inner cavity rear side wall of the control box and on the left side of the confluence. The upper side of the rear side wall of the inner cavity of the control box and the lower side of the DC loader are fixedly connected with an AC load device, and the lower side of the inner cavity rear side wall of the control box is fixedly connected with a mounting plate. The top of the board is fixedly connected with an inverter, and arranged in order from left to right, the left side of the bottom of the inner cavity of the control box is fixedly connected with a data collector, and the middle of the bottom of the inner cavity of the control box is fixedly connected with a wireless router , the bottom right side of the inner cavity of the control box is fixedly connected with a circuit detector.

Preferably, the busbar is electrically bidirectionally connected to the DC load and the AC load, the DC load is electrically bidirectionally connected to the right inverter, and the AC load is electrically bidirectionally connected to the left There are two inverters on the side, the inverters are electrically bidirectionally connected to the data collector, the data collector is electrically bidirectionally connected to the wireless router, and the wireless router is electrically bidirectionally connected to the circuit detector.

Preferably, a booster is fixedly connected to the upper side of the right side wall of the distribution box, two voltage reducers are fixedly connected to the lower side of the right side wall of the distribution box, and the electrical input of the booster is connected to the right side In the inverter, the electrical inputs of the two voltage reducers are connected to the two inverters on the left side.

Preferably, electric push rods are fixedly connected to the right side wall of the inner cavity of the distribution box, and arranged in sequence from top to bottom, and the left end of the electric push rods is fixedly connected to an electric terminal, and the electric terminal is electrically connected to Booster and Buck.

Preferably, the left side wall of the inner cavity of the distribution box is fixedly connected with wiring plugs, and arranged sequentially from top to bottom, and the left side wall of the distribution box is fixedly connected with a voltage stabilizer, and arranged sequentially from top to bottom, The voltage regulator is electrically connected to the terminal block.

Preferably, the solar cell group is electrically bidirectionally connected to a charging and discharging controller, and the charging and discharging controller is electrically bidirectionally connected to the confluence.

Preferably, the circuit detector is electrically bidirectionally connected to the DC load, the AC load, the wireless router, the inverter, the booster, the buck, and the charging and discharging controller.

Preferably, the photovoltaic power generation includes grid-connected power generation and off-grid power generation, and the off-grid power generation includes centralized power generation and distributed power generation. Charging and powering with home electricity.

Preferably, the grid-connected power generation is concentrated power generation and distributed power generation, and the off-grid power generation includes centralized power generation and distributed power generation. Battery charging, household electricity and national grid power supply, the grid-connected power generation can independently supply power to the national grid.

Compared with prior art, the beneficial effect of the present invention is:

1. The control system of the photovoltaic power station converts light energy into electrical energy through the solar cell group and transmits it to the confluence, and distributes it to the DC load and AC load through the confluence, and the DC load is transmitted to the elevator through the inverter. The voltage is sent to the upper electrical terminal through the booster, and the electric push rod on the upper side is controlled to drive the electrical terminal to be plugged into the terminal block, and then transmitted to the national grid through the voltage stabilizer, and the AC load passes through The inverter is sent to the voltage reducer, and then it is sent to the two power terminals on the lower side through the voltage reducer, and the two electric push rods on the lower side are controlled to drive the power terminals to be plugged into the wiring block, and then sent through the voltage stabilizer To household electricity, so that the decentralized transmission of electricity can be completed without transfer, the energy consumption of power transmission can be reduced, and power resources can be saved even more.

2. The control system of the photovoltaic power station, by adding a grid-connected power generation system and an off-grid power generation system to the system of the photovoltaic power station, when the grid-connected power generation is centralized for power generation, it simultaneously charges the battery, uses electricity for household use, and supplies power to the national grid. When the grid-connected power generation is distributed, it can charge the battery, household electricity and the national grid separately. When the off-grid power generation is centralized, it can charge the battery and power the household electricity at the same time. When it is decentralized, it can charge the battery and power separately. Household electricity is used for power supply, so that the power distribution system of photovoltaic power stations can be improved, and the power distribution can be clearly and detailedly controlled automatically, and the functionality is stronger.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention;

Fig. 2 is a schematic diagram of the front view of the sectional structure of the present invention;

Fig. 3 is a schematic cross-sectional structure diagram of the dispensing box of the present invention;

Fig. 4 is a schematic structural diagram of the system of the present invention;

Fig. 5 is a schematic structural diagram of the detection circuit system of the present invention;

6 is a schematic structural diagram of the off-grid power generation system of the present invention;

Fig. 7 is a schematic structural diagram of the grid-connected power generation system of the present invention.

In the figure: 100, control box; 110, confluence; 120, DC loader; 130, AC loader; 140, installation board; 141, inverter; 150, data collector; 160, wireless router; 170, circuit Detector; 200, distribution box; 210, booster; 220, voltage reducer; 230, electric push rod; 310. Charge and discharge controller.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment one:

Please refer to Figs. 1-5, the present invention provides a technical solution: a control system of a photovoltaic power station, including a control box 100, a distribution box 200 and a solar cell group 300, and the distribution box 200 is fixedly connected to the control box 100 by bolts In the upper left corner of the rear side wall of the inner cavity, the upper right corner of the inner cavity rear side wall of the control box 100 is fixedly connected with a confluence 110 , and the upper side of the inner cavity rear side wall of the control box 100 is fixedly connected with a DC load on the left side of the confluence 110 120, the upper side of the inner chamber rear side wall of the control box 100 and the lower side of the DC loader 120 are fixedly connected with the AC loader 130, and the lower side of the inner chamber rear side wall of the control box 100 is fixedly connected with the installation plate 140, and the installation The top of the board 140 is fixedly connected with an inverter 141, and arranged in sequence from left to right, the left side of the bottom of the inner cavity of the control box 100 is fixedly connected with a data collector 150, and the middle of the inner cavity bottom of the control box 100 is fixedly connected with a wireless Router 160, circuit detector 170 is fixedly connected to the right side of the inner cavity bottom of control box 100, busbar 110 is electrically bidirectionally connected to DC loader 120 and AC loader 130, and DC loader 120 is electrically bidirectionally connected to the right inverter 141, the AC load 130 is electrically bidirectionally connected to the left two inverters 141, the inverter 141 is electrically bidirectionally connected to the data collector 150, the data collector 150 is electrically bidirectionally connected to the wireless router 160, and the wireless router 160 is electrically bidirectionally connected Connect the circuit detector 170, the upper side of the right side wall of the distribution box 200 is fixedly connected with a booster 210, and the lower side of the right side wall of the distribution box 200 is fixedly connected with two voltage reducers 220, and the electrical input of the booster 210 is connected to The right side inverter 141, the two voltage reducers 220 are electrically connected to the two left side inverters 141, and the right side wall of the inner cavity of the distribution box 200 is fixedly connected with an electric push rod 230, which are arranged sequentially from top to bottom , the left end of the electric push rod 230 is fixedly connected with an electric terminal 231, and the electric terminal 231 is electrically connected with the booster 210 and the voltage reducer 220, and the left side wall of the distribution box 200 is fixedly connected with a terminal block 240, and from Arranged in order from top to bottom, the left side wall of the distribution box 200 is fixedly connected with a voltage stabilizer 250, and arranged in sequence from top to bottom, the voltage stabilizer 250 is electrically connected to the terminal block 240, and the solar battery pack 300 is electrically connected to the charging unit in two directions. The discharge controller 310, the charge and discharge controller 310 is electrically bidirectionally connected to the bus 110, and the circuit detector 170 is electrically bidirectionally connected to the DC load 120, the AC load 130, the wireless router 160, the inverter 141, the booster 210, The voltage reducer 220 and the charging and discharging controller 310 convert the light energy into electrical energy through the solar cell group 300 and deliver it to the confluence 110, and then distribute and transmit it to the DC load 120 and the AC load 130 through the confluence 110, and the DC load 120 It is sent to the booster 210 through the inverter 141, and then sent to the upper electrical terminal 231 through the booster 210, and the upper electric push rod 230 is controlled to drive the electrical terminal 231 to be plugged into the wiring plugged into the block 240, and then sent to the national grid through the voltage stabilizer 250, and the AC load 130 is sent to the step-down converter 220 through the inverter 141, and sent to the lower two power-connecting terminals 231 through the step-down device 220, and the control The two electric push rods 230 on the lower side drive the power terminals 231 to be plugged into the terminal block 240, and then transmit the electricity to the household through the voltage stabilizer 250, so that the decentralized transmission of electricity can be completed without transfer, Reduce the energy consumption of power transmission and save more power resources.

Embodiment two:

Please refer to Figs. 6-7, the present invention provides a technical solution: a control system of a photovoltaic power station, including a control box 100, a distribution box 200 and a solar cell group 300, and the distribution box 200 is fixedly connected to the control box 100 by bolts In the upper left corner of the rear side wall of the inner cavity, the upper right corner of the inner cavity rear side wall of the control box 100 is fixedly connected with a confluence 110 , and the upper side of the inner cavity rear side wall of the control box 100 is fixedly connected with a DC load on the left side of the confluence 110 120, the upper side of the inner chamber rear side wall of the control box 100 and the lower side of the DC loader 120 are fixedly connected with the AC loader 130, and the lower side of the inner chamber rear side wall of the control box 100 is fixedly connected with the installation plate 140, and the installation The top of the board 140 is fixedly connected with an inverter 141, and arranged in sequence from left to right, the left side of the bottom of the inner cavity of the control box 100 is fixedly connected with a data collector 150, and the middle of the inner cavity bottom of the control box 100 is fixedly connected with a wireless The router 160 is fixedly connected with a circuit detector 170 on the right side of the inner cavity bottom of the control box 100. Photovoltaic power generation includes grid-connected power generation and off-grid power generation. Off-grid power generation includes centralized power generation and decentralized power generation. Electric power supply, decentralized power generation can charge the storage battery and household power supply separately, grid-connected power generation centralized power generation and decentralized power generation, off-grid power generation includes centralized power generation and decentralized power generation, centralized power generation can charge the battery, household power and national grid power supply at the same time, Distributed power generation can charge batteries, household electricity and the national grid alone, and grid-connected power generation can supply power to the national grid alone. By adding grid-connected power generation systems and off-grid power generation systems to the photovoltaic power station system, grid-connected power When centralized power generation, it can charge the storage battery, household electricity and the national grid at the same time. When the grid-connected power generation is decentralized, it can independently charge the battery, household electricity and the national grid. Battery charging and household power supply. When decentralized power generation, battery charging and household power supply can be performed separately, so that the power distribution system of photovoltaic power stations can be improved, and the power distribution can be clearly and detailedly controlled automatically, with stronger functionality.

In specific use, by improving and upgrading the system of photovoltaic power stations, and adding grid-connected power generation systems and off-grid power generation systems to the system, those skilled in the art can automatically distribute power. At the same time, the battery is charged, the household electricity and the national grid are powered, and the light energy is converted into electrical energy through the solar cell group 300 and delivered to the confluence 110, and then distributed to the DC load 120 and the AC load 130 through the confluence 110. The load 120 is sent to the booster 210 through the inverter 141, and then sent to the upper electrical terminal 231 through the booster 210, and the upper electric push rod 230 is controlled to drive the electrical terminal 231 to be plugged into the terminal block 240 Then, it is sent to the national grid through the voltage stabilizer 250, and the AC load 130 is sent to the step-down converter 220 through the inverter 141, and then sent to the two power-connecting terminals 231 on the lower side through the step-down device 220 to control the lower side Two electric push rods 230 drive the electric terminal 231 to be plugged into the terminal block 240, and then the voltage stabilizer 250 is used to transmit the electricity to the household, and so on. Charging, household electricity and national grid power supply, when the off-grid power generation is concentrated, it can charge the battery and supply electricity for the household at the same time, and can charge the battery and supply electricity for the household separately when the power is distributed.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device.

While the invention has been described above with reference to the embodiments, various modifications may be made thereto and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention can be used in combination with each other in any way, and the description of these combinations is not exhaustive in this specification only to show In consideration of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (9)

1. A control system for a photovoltaic power station, characterized in that: it comprises a control box (100), a distribution box (200) and a solar battery pack (300), and the distribution box (200) is fixedly connected to the control box by bolts. The upper left corner of the inner cavity rear side wall of the box (100), the upper right corner of the inner cavity rear side wall of the control box (100) is fixedly connected with a confluence (110), and the inner cavity rear side wall of the control box (100) The upper side and the left side of the confluence (110) are fixedly connected with a DC load (120), and the inner chamber of the control box (100) is located on the upper side of the rear side wall of the DC load (120). The lower side is fixedly connected with an AC load device (130), the lower side of the inner cavity of the control box (100) is fixedly connected with a mounting plate (140), and the top of the mounting plate (140) is fixedly connected with an inverter device (141), and arranged in turn from left to right, the left side of the inner cavity bottom of the control box (100) is fixedly connected with a data collector (150), and the middle of the inner cavity bottom of the control box (100) is fixed A wireless router (160) is connected, and a circuit detector (170) is fixedly connected to the bottom right side of the inner cavity of the control box (100). 2. The control system of a photovoltaic power station according to claim 1, characterized in that: the confluence (110) electrically bidirectionally connects the DC load (120) and the AC load (130) , the DC load (120) is electrically bidirectionally connected to the right inverter (141), and the AC load (130) is electrically bidirectionally connected to the left two inverters (141), so The inverter (141) is electrically bidirectionally connected to the data collector (150), the data collector (150) is electrically bidirectionally connected to the wireless router (160), and the wireless router (160) is electrically bidirectionally connected to the circuit detector (170). 3. The control system of a photovoltaic power station according to claim 1, characterized in that: a booster (210) is fixedly connected to the upper side of the right side wall of the distribution box (200), and the distribution box ( 200), the lower side of the right side wall is fixedly connected with two voltage reducers (220), and the electrical input of the voltage booster (210) is connected to the inverter (141) on the right side, and the two voltage reducers (220) The electrical input is connected to the two inverters (141) on the left side. 4. The control system of a photovoltaic power station according to claim 1, characterized in that: the right side wall of the inner cavity of the distribution box (200) is fixedly connected with an electric push rod (230), and from top to bottom Arranged in sequence, the left end of the electric push rod (230) is fixedly connected with an electric terminal (231), and the electric terminal (231) is electrically connected to the voltage booster (210) and the voltage reducer (220). 5. The control system of a photovoltaic power station according to claim 1, characterized in that: the left side wall of the inner cavity of the distribution box (200) is fixedly connected with a terminal block (240), and the wiring plugs (240) are fixed in sequence from top to bottom. Arranged, the left side wall of the distribution box (200) is fixedly connected with a voltage stabilizer (250), and arranged in sequence from top to bottom, the voltage stabilizer (250) is electrically connected to the terminal block (240) . 6. The control system of a photovoltaic power station according to claim 1, characterized in that: the solar cell group (300) is electrically bidirectionally connected to a charging and discharging controller (310), and the charging and discharging controller (310 ) are electrically bidirectionally connected to the bus (110). 7. The control system of a photovoltaic power station according to claim 1, characterized in that: the circuit detector (170) is electrically bidirectionally connected to the DC load (120), the AC load (130) ), the wireless router (160), the inverter (141), the voltage booster (210), the voltage reducer (220) and the charging and discharging controller (310). 8. The control system of a photovoltaic power station according to claim 1, characterized in that: said photovoltaic power generation includes grid-connected power generation and off-grid power generation, said off-grid power generation includes centralized power generation and distributed power generation, and said centralized The power generation can charge the storage battery and supply electricity for household use at the same time, and the distributed generation can charge the storage battery and supply electricity for household use separately. 9. The control system of a photovoltaic power station according to claim 1, characterized in that: said grid-connected power generation is centralized power generation and decentralized power generation, said off-grid power generation includes centralized power generation and decentralized power generation, and said centralized power generation is simultaneously To charge the storage battery, household electricity and the national grid, the distributed power generation can independently charge the storage battery, household electricity and the national grid, and the grid-connected power generation can independently supply the national grid.

Images