Off-grid island micro-grid controller power supply system and method

A technology of microgrid controller and microgrid controller, which is applied in the field of microgrid, can solve the problems of power failure of microgrid controller, corrosion of islands, high failure rate of uninterruptible power supply devices, etc., and achieve the effect of improving the reliability of power supply

Pending Publication Date: 2022-05-10
NR ELECTRIC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in actual operation, due to the severe corrosion of the island, the failure rate of the uninterruptible power supply device is particularly high, so that the microgrid controller loses power, resulting in the collapse of the entire microgrid

Method used

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  • Off-grid island micro-grid controller power supply system and method

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Embodiment 1

[0022] Embodiment 1: as figure 1 As shown, the present invention proposes an off-grid island microgrid controller power supply system, including an uninterruptible power supply device and a dual power supply automatic switching device. One end of the uninterruptible power supply device is respectively connected to a DC input bus and an AC bus. The AC busbar is externally connected to an input power supply, the uninterruptible power supply device is connected to the dual power supply automatic switching device, and the dual power supply automatic switching device is externally connected to a micro-grid controller; the uninterruptible power supply device is used to provide high-quality and reliable AC The power supply, the dual power supply automatic switching device is used to realize the automatic switching of two power supplies.

[0023] Optionally, the input power includes any one or more of the following: wind turbine; photovoltaic; diesel generator; energy storage system. ...

Embodiment 2

[0028]Embodiment 2: The present invention also proposes a power supply method for an off-grid sea-island microgrid controller, including the following steps:

[0029] Step SS1: The utility power input circuit breaker of the uninterruptible power supply device is closed, and the utility power of the input power supply is supplied by the first isolation transformer, rectifier, inverter, second isolation transformer and static switch module in turn, and then by the AC output circuit breaker Closed to supply power to the micro-grid controller through the dual power switching device;

[0030] Step SS2: When the circuit where the mains input circuit breaker is located fails, the bypass input circuit breaker is closed, the mains power of the input power supply is supplied by the static switch module in turn, and then the AC output circuit breaker is closed and passed through the dual power switching device to form a microgrid Controller power supply;

[0031] Step SS3: When the circ...

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Abstract

The invention discloses an off-grid island micro-grid controller power supply system and method.The system comprises an uninterruptible power supply device and a dual-power-supply automatic switching device, one end of the uninterruptible power supply device is connected with a direct-current input bus and an alternating-current bus, the alternating-current bus is externally connected with an input power supply, and the other end of the uninterruptible power supply device is connected with the dual-power-supply automatic switching device; the uninterruptible power supply device is connected with the dual-power-supply automatic switching device, and the dual-power-supply automatic switching device is externally connected with a micro-grid controller; the uninterruptible power supply device is used for providing a high-quality and reliable alternating current power supply, and the dual-power-supply automatic switching device is used for realizing automatic switching of two paths of power supplies. When the uninterruptible power supply device breaks down and the 400V alternating current bus of the micro-grid is electrified, the dual-power-supply switching device can be automatically switched to the standby power supply input loop, so that the micro-grid controller continuously obtains power supply input, and the power supply reliability of the whole micro-grid is improved.

Description

technical field [0001] The invention relates to an off-grid sea-island micro-grid controller power supply system and method, and belongs to the technical field of micro-grids. Background technique [0002] With the continuous promotion of new energy technologies, many islands that deviate from the inland and cannot assume AC mains power supply through new energy sources. These new energy power inputs and load outputs are coordinated and controlled by a micro-grid controller to form a micro-grid. In existing microgrids, microgrid controllers are powered by uninterruptible power supplies. However, in actual operation, due to the severe corrosion of the island, the failure rate of the uninterruptible power supply device is particularly high, which causes the microgrid controller to lose power, resulting in the collapse of the entire microgrid. Contents of the invention [0003] The purpose of the present invention is to overcome the technical defects in the prior art, solve...

Claims

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Application Information

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IPC IPC(8): H02J9/06
CPCH02J9/062
Inventor 马力
Owner NR ELECTRIC CO LTD
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