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Photovoltaic power station power supply dispatching system and method

A technology of photovoltaic power station and scheduling method, applied in photovoltaic power generation, electrical components, circuit devices, etc., can solve problems such as multiple energy loss, loss of power generation revenue, etc., and achieve the effect of improving utilization rate, reducing loss, and strong scalability

Active Publication Date: 2019-05-10
ANHUI POLYTECHNIC UNIV
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  • Claims
  • Application Information

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Problems solved by technology

This mode has two disadvantages: on the one hand, the electric energy produced by the photovoltaic power station can only reach the user after multiple transformations and long-distance line transmission, resulting in more energy loss
On the other hand, there is a certain price difference between the on-grid electricity price and the retail electricity price of the grid. The photovoltaic power station sells all the electricity produced at a lower on-grid electricity price, and loses a certain amount of power generation revenue.

Method used

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  • Photovoltaic power station power supply dispatching system and method
  • Photovoltaic power station power supply dispatching system and method
  • Photovoltaic power station power supply dispatching system and method

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Embodiment Construction

[0047] Photovoltaic power supply system structure:

[0048] The structure of the power supply system of the photovoltaic power station adopted in the present invention is as follows: figure 1 Shown:

[0049] The photovoltaic module 2 in the photovoltaic power station 1 converts solar energy into direct current, and the direct current is converted into low-voltage alternating current by an inverter 3 . The low-voltage alternating current is divided into two routes, one route passes through the second knife switch 4 and the second electricity meter 5 to connect the local low-voltage user line 6, and supplies power to local users (such as 7 and 8); the other route passes through the first knife switch 9 and the second electricity meter 5. The first electricity meter 10 is connected to a step-up transformer 11 , and connected to the high-voltage bus 12 of the public power grid after being boosted. The high-voltage busbar of the public grid is connected to the local low-voltage use...

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Abstract

The invention discloses a power supply dispatching system for a photovoltaic power station and a method and mainly aims to solve the two main problems of a unified purchase and sale grid-connected mode of the photovoltaic power station as follows: 1) higher electric energy loss is produced due to repeated voltage transformation and remote transmission; 2) certain revenue loss is produced for the photovoltaic power station due to lower on-grid price for electricity selling. With adoption of the power supply dispatching system for the photovoltaic power station and the method, the photovoltaic power station can give priority to power supply to a local third-party terminal user (short for local user), and electric energy loss caused by input into a public supply network is reduced. Meanwhile, the invention further discloses a pricing method used when the photovoltaic power station supplies power directly to the local user. Therefore, the photovoltaic power station can sell part of electricity at a price higher than on-grid price and the local user can buy part of electricity at a price lower than retail electricity price of a grid. The power supply dispatching system for the photovoltaic power station and the method have the advantages that grid-connected loss of the photovoltaic power station can be reduced, power generating benefit of the photovoltaic power station is increased, and power consumption cost of the local user is reduced.

Description

technical field [0001] The invention relates to the field of photovoltaic power generation, in particular to the field of photovoltaic power generation dispatching. Background technique [0002] The new energy power supply mode represented by solar photovoltaic power generation has a good application prospect. At present, photovoltaic power plants generally adopt the grid-connected mode of unified purchase and unified sales to obtain power generation revenue. In this mode, the photovoltaic power station needs to connect the electric energy generated by the photovoltaic system to the high-voltage line of the public grid after direct / ac conversion and boosting by the inverter. This mode has two disadvantages: on the one hand, the electric energy produced by the photovoltaic power station can only reach the user after multiple transformations and long-distance line transmission, resulting in more energy loss. On the other hand, there is a certain price difference between the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/38
CPCH02J3/00H02J3/383H02J3/388Y02E10/56
Inventor 余诺
Owner ANHUI POLYTECHNIC UNIV
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