High-efficiency distributed photovoltaic power generation system

Abstract

The invention relates to the technical field of photovoltaic power generation, in particular to a high-efficiency distributed photovoltaic power generation system, and solves the problems that the existing distributed photovoltaic power generation is inconvenient to store due to the fact that the number of photovoltaic power generation base stations is large, and the electric energy of photovoltaic power generation is directly used for users. The system comprises a master control center and a plurality of photovoltaic power generation base stations, a transformer station is installed between the master control center and the plurality of photovoltaic power generation base stations, a power distribution network is installed at the power transmission ends of the plurality of photovoltaic power generation base stations, and the power distribution network is installed at the power transmission ends of the plurality of photovoltaic power generation base stations. The transformer station is connected with the main control center and the plurality of photovoltaic power generation base stations through communication lines; and the main control center comprises a data conversion module. Through the arrangement of the distributed photovoltaic power generation base station, electric energy storage can be carried out while the power utilization requirement of a user is met, and then remote efficient management of electric energy and electric energy allocation according to the power grid requirement are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power generation, and in particular to a high-efficiency distributed photovoltaic power generation system. Background Art

[0002] Distributed photovoltaic power generation is a power generation system that uses photovoltaic modules to directly convert solar energy into electrical energy. It is usually arranged near users and connected to a power grid with a voltage level of less than 35 kV or lower. Its core advantages are that it is adapted to local conditions, clean and efficient, decentralized, and uses solar energy resources nearby. It can effectively improve power generation efficiency and reduce power losses during voltage boosting and long-distance transportation. Distributed photovoltaic power generation systems are usually installed near user sites, such as on the roofs of urban buildings, and together with the public power grid, they provide power to nearby users. This power generation method not only reduces the consumption of fossil energy, but also has the advantages of economic energy saving, heat insulation and cooling, and green environmental protection.

[0003] The existing distributed photovoltaic power generation has a large number of photovoltaic power generation base stations, and the photovoltaic power generation electricity is directly used for users, which is not convenient for storing electricity, and thus cannot efficiently manage and allocate distributed photovoltaic power generation according to the needs of the power grid; therefore, it does not meet the existing needs. In this regard, we propose a high-efficiency distributed photovoltaic power generation system. Summary of the invention

[0004] The purpose of the present invention is to provide a high-efficiency distributed photovoltaic power generation system to solve the problem raised in the above background technology that due to the large number of photovoltaic power generation base stations, the photovoltaic power generation electricity is directly used for users, which is inconvenient to store the electricity, and thus it is impossible to efficiently manage and allocate the distributed photovoltaic power generation according to the needs of the power grid.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-efficiency distributed photovoltaic power generation system, comprising a main control center and a plurality of photovoltaic power generation base stations, a transformer station is installed between the main control center and the plurality of photovoltaic power generation base stations, a distribution network is installed at the transmission end of the plurality of photovoltaic power generation base stations, and the transformer station is connected to the main control center and the plurality of photovoltaic power generation base stations through communication lines;

[0006] The main control center includes a data conversion module, which is used to obtain data information generated by multiple photovoltaic power generation base stations in a distributed installation during operation, and use communication lines or wireless transmission modules to remotely transmit data. The data conversion module can parse, process and store the data through a built-in processor, data converter and memory;

[0007] The multi-line detection module is used to monitor the operating status of each module of the distributed photovoltaic power generation system, and test the data changes of each module after the instruction transmission to ensure the stability of data generation and processing;

[0008] The monitoring and early warning module is used to determine the weather and installation environment of the geographical locations of multiple photovoltaic power generation base stations, and monitor the weather parameters, ambient temperature and humidity, and images corresponding to the installation locations. It has a built-in weather database, and by comparing the monitored data with the weather database, it can achieve early warning and timely deployment of the expected photovoltaic power generation;

[0009] The power supply distribution module is used to manage the distributed electric energy of photovoltaic power generation. It has a built-in algorithm chip, which calculates the power demand of the power grid. It increases the storage capacity of electric energy during low electricity consumption and increases the storage power supply during peak electricity consumption, thereby reducing the operating pressure of photovoltaic power generation.

[0010] Preferably, the distribution network is unidirectionally connected to the main control center and multiple photovoltaic power generation base stations through a first power supply line, the distribution network is connected to multiple users through a second power supply line, and the electric energy inside the photovoltaic power generation base station is respectively transmitted to the main control center and multiple users through the distribution network.

[0011] Preferably, the photovoltaic power generation base station is composed of a distributed power storage mechanism and multiple photovoltaic power generation units, and the photovoltaic power generation unit includes a power generation support frame, a photovoltaic panel is fixedly installed on the upper end of the power generation support frame, and a cable installation tube is fixedly installed in the middle of the lower end surface of the photovoltaic panel.

[0012] Preferably, the distributed electricity storage mechanism includes an electricity storage box, both ends of the lower end surface of the electricity storage box are fixedly installed with concrete bases, a liquid level monitoring tube is installed between the two concrete bases, a cable conveying pipe is fixedly installed on one side of the electricity storage box, and a plurality of support frames arranged in a linear manner are installed on the outer side of the cable conveying pipe, a ventilation sleeve is fixedly installed on the front end surface of the electricity storage box, a radiator is fixedly installed in the middle part of the front end surface of the ventilation sleeve, a protective upper cover is fixedly installed on the upper end of the electricity storage box, and a light monitoring cover is fixedly installed on the upper end surface of the protective upper cover, an isolation sleeve is fixedly installed on the inner side of the electricity storage box, a plurality of electricity storage battery packs are installed on the rear end surface of the isolation sleeve, and a plurality of inverters and power connection boxes are installed on the inner side of the isolation sleeve.

[0013] Preferably, cables are provided inside the cable installation tube and the cable delivery tube, the cables pass through the power storage box and are electrically connected to a plurality of power connection boxes, and the power connection boxes are connected to the power storage battery pack via an inverter.

[0014] Preferably, a liquid level sensor is provided on the inner side of the liquid level monitoring tube, and a photosensor is fixedly provided on the inner side of the light monitoring cover. The main control center is connected to the liquid level sensor and the photosensor through a communication line. The main control center monitors the bottom liquid level of the power storage box and the power generation efficiency of the photovoltaic panel through the liquid level sensor and the photosensor.

[0015] Preferably, fans are provided on the inner sides of both ends of the ventilation sleeve, the interior of the radiator is filled with cooling medium, and the surface of the radiator is provided with a plurality of cooling fins.

[0016] Preferably, the power capacity requirement of the distribution network is:

[0017] Creq=Ereq / Vdc 2 ;

[0018] Where Ereq is the total energy demand in kilowatt-hours, and Vdc is the DC voltage of the photovoltaic panel;

[0019] The power demand of the distribution network:

[0020] Preq = (1 + L) × Ptotal;

[0021] Where L is the load loss rate of the distribution network, and Ptotal is the total output power of multiple photovoltaic panels.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention uses a communication line to monitor multiple photovoltaic power generation base stations in a distributed installation in real time through a main control center, generates photovoltaic power through photovoltaic panels, and stores electric energy in multiple storage battery packs through cables provided inside a cable installation tube. The transformer station is connected to multiple distributed power storage mechanisms through a power connection box and an inverter, and then the inverter can convert the direct current stored in the storage battery pack into alternating current and regulate the voltage through the transformer station, and then use the distribution network to transmit the electric energy to users, thereby meeting the efficient application of electric energy for photovoltaic power generation;

[0024] 2. The present invention monitors the light intensity at the location of the photovoltaic power generation base station by providing a photosensitive sensor on the inner side of the light monitoring cover, and then can measure the power generation of the photovoltaic panel, and then can accurately calculate the electric energy stored and generated by each photovoltaic power generation base station, so as to facilitate the accurate allocation of the electric energy in the storage battery pack through the built-in power supply distribution module of the main control center. When the power consumption is low, the photovoltaic power generation operating power of the photovoltaic panel is reduced and the output power of the storage battery pack is increased to realize the storage operation of the storage battery pack. When the power consumption is peak, the photovoltaic power generation operating power of the photovoltaic panel is increased and the energy storage operation of the storage battery pack is stopped, so as to increase the supply of photovoltaic power generation to the distribution network. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the main control center of the present invention;

[0026] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of a photovoltaic power generation base station of the present invention;

[0028] Figure 4 It is a schematic diagram of the installation structure of the distributed power storage mechanism of the present invention;

[0029] Figure 5 It is a side view of the photovoltaic power generation base station of the present invention;

[0030] Figure 6 It is a partial structural schematic diagram of the photovoltaic power generation base station of the present invention;

[0031] Figure 7 It is a partial cross-sectional structural schematic diagram of the distributed power storage mechanism of the present invention;

[0032] Figure 8 The present invention is an overall flow chart.

[0033] In the figure: 1. Main control center; 2. Transformer station; 3. Photovoltaic power generation base station; 4. Distribution network; 5. Communication line; 6. First power supply line; 7. Second power supply line; 31. Distributed power storage mechanism; 32. Photovoltaic power generation unit; 3101. Power storage box; 3102. Protective cover; 3103. Support stand; 3104. Cable conveying pipe; 3105. Light monitoring cover; 3106. Concrete base; 3107. Liquid level monitoring pipe; 3108. Radiator; 3109. Ventilation sleeve; 3110. Power storage battery pack; 3111. Isolation sleeve; 3112. Power connection box; 3113. Inverter; 3201. Power generation support frame; 3202. Photovoltaic panel; 3203. Cable installation pipe. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] See also Figure 1 and Figure 2The present invention provides an embodiment: a high-efficiency distributed photovoltaic power generation system, including a main control center 1 and multiple photovoltaic power generation base stations 3, a transformer station 2 is installed between the main control center 1 and the multiple photovoltaic power generation base stations 3, a distribution network 4 is installed at the transmission end of the multiple photovoltaic power generation base stations 3, the transformer station 2 is connected to the main control center 1 and the multiple photovoltaic power generation base stations 3 through a communication line 5, the distribution network 4 is unidirectionally connected to the main control center 1 and the multiple photovoltaic power generation base stations 3 through a first power supply line 6, the distribution network 4 is connected to multiple users through a second power supply line 7, the electric energy inside the photovoltaic power generation base station 3 is respectively transmitted to the main control center 1 and the multiple users through the distribution network 4, the main control center 1 performs real-time monitoring and control on the multiple photovoltaic power generation base stations 3 in a distributed installation through the communication line 5, so as to facilitate efficient management of the multiple photovoltaic power generation base stations 3.

[0036] See also Figure 1 The main control center 1 includes a data conversion module, which is used to obtain data information generated by multiple photovoltaic power generation base stations 3 in a distributed installation during operation, and use the communication line 5 or the wireless transmission module to remotely transmit the data. The data conversion module can parse, process and store the data through the built-in processor, data converter and memory;

[0037] The multi-line detection module is used to monitor the operating status of each module of the distributed photovoltaic power generation system, and test the data changes of each module after the instruction transmission to ensure the stability of data generation and processing;

[0038] The monitoring and early warning module is used to determine the weather and installation environment of the geographical locations of the multiple photovoltaic power generation base stations 3, and monitor the weather parameters, ambient temperature and humidity, and images corresponding to the installation locations. It has a built-in weather database, and compares the monitored data with the weather database to achieve early warning and timely deployment of the expected photovoltaic power generation;

[0039] The power supply distribution module is used to manage the distributed electric energy of photovoltaic power generation. It has a built-in algorithm chip, which calculates the power demand of the power grid. It increases the storage capacity of electric energy during low electricity consumption and increases the storage power supply during peak electricity consumption, thereby reducing the operating pressure of photovoltaic power generation.

[0040] See also Figures 3 to 7The photovoltaic power generation base station 3 is composed of a distributed power storage mechanism 31 and a plurality of photovoltaic power generation units 32. The photovoltaic power generation unit 32 includes a power generation support frame 3201. A photovoltaic panel 3202 is fixedly installed on the upper end of the power generation support frame 3201. A cable installation pipe 3203 is fixedly installed in the middle of the lower end surface of the photovoltaic panel 3202. The distributed power storage mechanism 31 includes a power storage box 3101. Concrete bases 3106 are fixedly installed at both ends of the lower end surface of the power storage box 3101. A liquid level monitoring device 3106 is installed between the two concrete bases 3106. The measuring tube 3107, a liquid level sensor is arranged on the inner side of the liquid level monitoring tube 3107, a photosensor is fixedly arranged on the inner side of the light monitoring cover 3105, the main control center 1 is connected with the liquid level sensor and the photosensor through the communication line 5, the main control center 1 monitors the bottom liquid level of the power storage box 3101 and the power generation efficiency of the photovoltaic panel 3202 through the liquid level sensor and the photosensor, and monitors the light intensity at the location of the photovoltaic power generation base station 3 through the photosensor, so as to calculate the power generation of the photovoltaic panel 3202;

[0041] A cable conveying pipe 3104 is fixedly installed on one side of the power storage box 3101, and a plurality of support frames 3103 arranged in a linear manner are installed on the outer side of the cable conveying pipe 3104. A ventilation sleeve 3109 is fixedly installed on the front end surface of the power storage box 3101, and a radiator 3108 is fixedly installed in the middle of the front end surface of the ventilation sleeve 3109. Fans are arranged on the inner sides of both ends of the ventilation sleeve 3109. The interior of the radiator 3108 is filled with a cooling medium, and a plurality of cooling fins are arranged on the surface of the radiator 3108. The power storage box 3101 can be stably cooled by the radiator 3108.

[0042] A protective upper cover 3102 is fixedly installed on the upper end of the power storage box 3101, and a light monitoring cover 3105 is fixedly installed on the upper end surface of the protective upper cover 3102. An isolation sleeve 3111 is fixedly installed on the inner side of the power storage box 3101, and a plurality of power storage battery packs 3110 are installed on the rear end surface of the isolation sleeve 3111. A plurality of inverters 3113 and a power connection box 3112 are installed on the inner side of the isolation sleeve 3111. Cables are provided on the inner sides of the cable installation tube 3203 and the cable conveying tube 3104. The cables pass through the power storage box 3101 and are electrically connected to the plurality of power connection boxes 3112. The power connection box 3112 is connected to the power storage battery pack 3110 through the inverter 3113. The inverter 3113 can convert the direct current stored in the power storage battery pack 3110 into alternating current and adjust the voltage through the transformer station 2, and then the electric energy is transmitted to the user through the distribution network 4.

[0043] Among them, the capacity requirement of distribution network 4 is:

[0044] Creq=Ereq / Vdc 2 ;

[0045] Where Ereq is the total energy demand in kilowatt-hours, and Vdc is the DC voltage of the photovoltaic panel 3202;

[0046] Power demand of distribution network 4:

[0047] Preq = (1 + L) × Ptotal;

[0048] Wherein L is the load loss rate of the distribution network 4 , and Ptotal is the total output power of the plurality of photovoltaic panels 3202 .

[0049] When using, according to the attached Figure 8 When distributing electric energy for distributed photovoltaic power generation, the main control center 1 monitors multiple photovoltaic power generation base stations 3 in distributed installation in real time through the communication line 5. Specifically, the photovoltaic power generation base station 3 is composed of a distributed power storage mechanism 31 and a photovoltaic power generation unit 32, and a plurality of photovoltaic power generation units 32 are installed on one side of each distributed power storage mechanism 31, so that photovoltaic power generation is carried out through the photovoltaic panel 3202 under the support of the power generation support frame 3201, and the electric energy is stored in the plurality of power storage battery packs 3110 through the cables provided on the inner side of the cable installation tube 3203;

[0050] The transformer station 2 is connected to multiple distributed power storage mechanisms 31 through the power connection box 3112 and the inverter 3113, and the inverter 3113 can convert the direct current stored in the storage battery pack 3110 into alternating current and regulate the voltage through the transformer station 2, and then use the distribution network 4 to transmit the electric energy to the user, and the light intensity at the location of the photovoltaic power generation base station 3 is monitored by a photosensitive sensor provided on the inner side of the light monitoring cover 3105, so that the power generation of the photovoltaic panel 3202 can be measured, and the electric energy stored and generated by each photovoltaic power generation base station 3 can be accurately calculated, so that the electric energy in the storage battery pack 3110 can be accurately allocated through the built-in power supply distribution module of the main control center 1;

[0051] When electricity consumption is low, the photovoltaic power generation operating power of the photovoltaic panel 3202 is reduced and the output power of the storage battery pack 3110 is increased to realize the storage operation of the storage battery pack 3110 on electricity. When electricity consumption is peak, the photovoltaic power generation operating power of the photovoltaic panel 3202 is increased and the energy storage operation of the storage battery pack 3110 is stopped to increase the supply of photovoltaic power generation to the distribution network 4.

[0052] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A high-efficiency distributed photovoltaic power generation system, comprising a main control center (1) and a plurality of photovoltaic power generation base stations (3), characterized in that: A transformer station (2) is installed between the main control center (1) and the plurality of photovoltaic power generation base stations (3); a distribution network (4) is installed at the transmission end of the plurality of photovoltaic power generation base stations (3); and the transformer station (2) is connected to the main control center (1) and the plurality of photovoltaic power generation base stations (3) via a communication line (5); The main control center (1) includes a data conversion module, which is used to obtain data information generated by multiple photovoltaic power generation base stations (3) in a distributed installation during operation, and to remotely transmit the data using a communication line (5) or a wireless transmission module. The data conversion module can be used to analyze, process and store the data through a processor, a data converter and a memory built into the data conversion module; The multi-line detection module is used to monitor the operating status of each module of the distributed photovoltaic power generation system, and test the data changes of each module after the instruction transmission to ensure the stability of data generation and processing; A monitoring and early warning module is used to determine the weather and installation environment of the geographical locations of the plurality of photovoltaic power generation base stations (3), and monitors the weather parameters, ambient temperature and humidity, and images corresponding to the installation locations. A weather database is built in, and by comparing the monitored data with the weather database, early warning and timely allocation of expected photovoltaic power generation can be achieved; The power supply distribution module is used to manage the distributed electric energy of photovoltaic power generation. It has a built-in algorithm chip, which calculates the power demand of the power grid. It increases the storage capacity of electric energy during low electricity consumption and increases the storage power supply during peak electricity consumption, thereby reducing the operating pressure of photovoltaic power generation.

2. A high-efficiency distributed photovoltaic power generation system according to claim 1, characterized in that: The distribution network (4) is unidirectionally connected to the main control center (1) and the plurality of photovoltaic power generation base stations (3) via a first power supply line (6); the distribution network (4) is connected to the plurality of users via a second power supply line (7); and the electric energy inside the photovoltaic power generation base station (3) is respectively transmitted to the main control center (1) and the plurality of users via the distribution network (4).

3. A high-efficiency distributed photovoltaic power generation system according to claim 2, characterized in that: The photovoltaic power generation base station (3) is composed of a distributed power storage mechanism (31) and a plurality of photovoltaic power generation units (32), wherein the photovoltaic power generation unit (32) comprises a power generation support frame (3201), a photovoltaic panel (3202) is fixedly mounted on the upper end of the power generation support frame (3201), and a cable installation tube (3203) is fixedly mounted in the middle of the lower end surface of the photovoltaic panel (3202).

4. A high-efficiency distributed photovoltaic power generation system according to claim 3, characterized in that: The distributed power storage mechanism (31) comprises a power storage box (3101), both ends of the lower end surface of the power storage box (3101) are fixedly mounted with concrete bases (3106), a liquid level monitoring tube (3107) is installed between the two concrete bases (3106), a cable conveying tube (3104) is fixedly mounted on one side of the power storage box (3101), a plurality of support frames (3103) arranged in a linear manner are installed on the outer side of the cable conveying tube (3104), a ventilation sleeve (3109) is fixedly mounted on the front end surface of the power storage box (3101), and the A radiator (3108) is fixedly mounted in the middle of the front end surface of the ventilation sleeve (3109); a protective upper cover (3102) is fixedly mounted on the upper end of the power storage box (3101); a light monitoring cover (3105) is fixedly mounted on the upper end surface of the protective upper cover (3102); an isolation sleeve (3111) is fixedly mounted on the inner side of the power storage box (3101); a plurality of power storage battery packs (3110) are mounted on the rear end surface of the isolation sleeve (3111); and a plurality of inverters (3113) and a power connection box (3112) are mounted on the inner side of the isolation sleeve (3111).

5. A high-efficiency distributed photovoltaic power generation system according to claim 4, characterized in that: Cables are provided inside the cable installation tube (3203) and the cable delivery tube (3104). The cables pass through the power storage box (3101) and are electrically connected to a plurality of power connection boxes (3112). The power connection boxes (3112) are connected to the power storage battery pack (3110) via an inverter (3113).

6. A high-efficiency distributed photovoltaic power generation system according to claim 5, characterized in that: A liquid level sensor is provided on the inner side of the liquid level monitoring tube (3107), a photosensor is fixedly provided on the inner side of the light monitoring cover (3105), the main control center (1) is connected to the liquid level sensor and the photosensor via a communication line (5), and the main control center (1) monitors the bottom liquid level of the power storage box (3101) and the power generation efficiency of the photovoltaic panel (3202) via the liquid level sensor and the photosensor.

7. A high-efficiency distributed photovoltaic power generation system according to claim 6, characterized in that: Fans are provided on the inner sides of both ends of the ventilation sleeve (3109), the interior of the radiator (3108) is filled with cooling medium, and a plurality of cooling fins are provided on the surface of the radiator (3108).

8. A high-efficiency distributed photovoltaic power generation system according to claim 7, characterized in that: The capacity requirement of the distribution network (4): Creq=Ereq / Vdc 2 ; Where Ereq is the total energy demand in kilowatt-hours, Vdc is the DC voltage of the photovoltaic panel (3202); The power demand of the distribution network (4): Preq = (1 + L) × Ptotal; Wherein L is the load loss rate of the distribution network (4), and Ptotal is the total output power of the plurality of photovoltaic panels (3202).

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