CN210517806U

CN210517806U - Off-grid energy storage power station with grid-connected function and capable of being directly connected to grid

Info

Publication number: CN210517806U
Application number: CN201920913086.5U
Authority: CN
Inventors: 张文宝; 王莉
Original assignee: Jiangyin Xinchanghong Power Technology Co ltd
Current assignee: Jiangyin Xinchanghong Power Technology Co ltd
Priority date: 2019-06-17
Filing date: 2019-06-17
Publication date: 2020-05-12
Anticipated expiration: 2029-06-17

Abstract

The utility model relates to an energy storage power station from net with function of being incorporated into power networks and can directly be incorporated into power networks, it includes solar panel, solar panel links to each other with a plurality of inverters that connect in parallel and set up through front channel grid-connected switch, load, and the load that inverter rethread isolation transformer and back channel grid-connected switch and state net power is connected, still connect in parallel with multiunit user load between the load of inverter and state net power, be equipped with a double switch power switch and load on the parallel circuit that every group user load place; the off-grid energy storage power station with the grid-connected function and capable of being directly connected with the grid is further provided with an energy storage battery and a controller, the energy storage battery is respectively connected with the inverter and the AC/DC converter for supplying power, the AC/DC converter is connected with a load of a national grid power supply, and the controller is respectively connected with a load of a solar panel, a load of the national grid power supply, a user load, the inverter, the AC/DC converter and the energy storage battery for controlling the energy storage battery.

Description

Off-grid energy storage power station with grid-connected function and capable of being directly connected to grid

Technical Field

The utility model relates to an energy storage power station from net with function and can directly be incorporated into the power networks is incorporated into the power networks.

Background

The normal energy storage power stations are operated in a grid-connected mode, and can also be switched into an off-grid operation mode after the power grid loses power. However, the grid-connection and grid-disconnection switching needs a certain time. For part of important loads with higher requirements and without power failure, even 1MS of stopping power every time can scrap a lot of products on the production line, thereby causing great loss of users. Meanwhile, an off-grid energy storage power station is also arranged in the market, so that the load of a user can be automatically switched between a power grid power station and an energy storage power supply, but the time difference is more or less in the switching process, and the loss of the user can be brought to the important load which has higher requirement and can not be powered off. Therefore, an off-grid energy storage power station which can be switched between two paths of power supplies without power failure (without any time interval), can be freely switched without synchronization and waiting, has a grid-connected function and can be directly connected with a grid is urgently needed in the market. The power grid voltage fluctuation caused by natural disasters such as severe weather and the like can be prevented from bringing great harm to equipment or products.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model aims to provide an off-grid energy storage power station with function of being incorporated into the power networks and can directly be incorporated into the power networks can do not have the switching of not having the power failure of any time interval between two-way power, can freely switch and need not be synchronous, does not need to wait for, can prevent to bring great harm to equipment or product because the electric wire netting voltage fluctuation that natural disasters such as bad weather arouse.

The purpose of the utility model is realized like this:

an off-grid energy storage power station with a grid-connected function and capable of being directly connected with a grid comprises a solar panel, wherein the solar panel is connected with a plurality of inverters arranged in parallel through a front grid-connected switch and a load, the inverters are connected with the load of a national grid power supply through an isolation transformer and a rear grid-connected switch, the inverters are also connected with a plurality of groups of user loads in parallel, and a parallel circuit where each group of user loads is located is provided with a double-switch power switch and a load;

the off-grid energy storage power station with the grid-connected function and capable of being directly connected with the grid is further provided with an energy storage battery and a controller, the energy storage battery is respectively connected with the inverter and the AC/DC converter for supplying power, the AC/DC converter is connected with a load of a national grid power supply, and the controller is respectively connected with a load of a solar panel, a load of the national grid power supply, a user load, the inverter, the AC/DC converter and the energy storage battery for controlling the energy storage battery.

Compared with the prior art, the utility model has the advantages of:

the utility model relates to an off-grid energy storage power station with grid-connected function and capable of being directly connected to the grid can be switched without any time interval between two power supplies, when the state grid power grid is on again, the off-grid inverter can be automatically synchronous with the power grid in the shortest time; when the off-grid inverter fails and can not provide a voltage source, the isolation transformer replaces the off-grid inverter to provide the voltage source for the inverter of the off-grid system, so that the off-grid system is not powered off immediately, and normal operation of important equipment or a production line is ensured. Meanwhile, after the system gives an alarm, the system automatically or manually switches the load to the power grid, and then workers overhaul the off-grid inverter and recover the operation after removing the fault, so that the two power supplies can be switched without any time interval, the free switching does not need to be synchronous, the waiting is not needed, and the major damage to equipment or products caused by the voltage fluctuation of the power grid due to natural disasters such as severe weather can be prevented.

Drawings

Fig. 1 is the utility model relates to a structure schematic diagram of off-grid energy storage power station with function and can directly be incorporated into the power networks that are incorporated into the power networks.

Wherein: the solar energy system comprises a solar panel 1, a front-channel grid-connected switch 2, an inverter 3, an isolation transformer 4, a rear-channel grid-connected switch 5, a national grid power supply 6, a user load 7, a double-switching power supply switch 8, an energy storage battery 9, a controller 10 and an AC/DC converter 11.

Detailed Description

Referring to fig. 1, the utility model relates to an energy storage power station leaves net with function of being incorporated into the power networks directly can be incorporated into the power networks, it includes solar panel 1, solar panel 1 links to each other with a plurality of dc-to-ac converters 3 of parallelly connected setting through the 2 loads of front track switch that is incorporated into the power networks, and dc-to-ac converter 3 is for leaving the net dc-to-ac converter, and grid frequency phase angle voltage can be tracked to the dc-to-ac converter, and the output is with the electric wire netting with same frequency, with same phase, with the same pressure, and dc-to-ac converter 3 rethread isolation transformer 4 and back track switch 5 are connected with the load of state net power 6, still connect in parallel with multiunit user load 7 between the load of dc-to-ac converter 3 and state net power 6, be equipped with a two switching power.

The off-grid energy storage power station with the grid-connected function and capable of being directly connected with the grid is further provided with an energy storage battery 9 and a controller 10, the energy storage battery 9 is controlled by a BMS battery management system, the energy storage battery 9 is respectively connected with an inverter 3 and an AC/DC converter 11 for supplying power, the AC/DC converter 11 is connected with a load of a national grid power supply 6, and the controller 10 is respectively connected with the load of the solar panel 1, the load of the national grid power supply 6, a user load 7, the inverter 3, the AC/DC converter 11 and the energy storage battery 9 for controlling the same. The controller 10 can receive control instructions to transmit electric energy to a national grid and can also receive the control instructions to receive the input power of the grid, and even if the voltage of the grid disappears, the stable operation of an off-grid power supply and a load is not influenced.

Claims

1. The utility model provides an energy storage power station from net with function of being incorporated into the power networks and can directly be incorporated into the power networks which characterized in that: the solar panel is connected with a plurality of inverters arranged in parallel through a front grid-connected switch and a load, the inverters are connected with the load of a national grid power supply through an isolation transformer and a rear grid-connected switch, the inverters and the load of the national grid power supply are connected in parallel with a plurality of groups of user loads, and a parallel circuit where each group of user loads are located is provided with a double-switching power supply switch and the load;