Control method for marine hybrid power unit, power unit and power system

A technology of hybrid power and control method, applied in the field of clean energy, which can solve problems such as the inability to meet the real-time demand of power

Inactive Publication Date: 2019-09-20
CSSC POWER INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a control method, a power unit and a power system of a marine hybrid power unit, and through coordinated control of the output power of a fuel cell and a lithium battery, it overcomes the defect that the fuel cell cannot meet the real-time demand for power under different working conditions of the ship

Method used

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  • Control method for marine hybrid power unit, power unit and power system
  • Control method for marine hybrid power unit, power unit and power system
  • Control method for marine hybrid power unit, power unit and power system

Examples

Experimental program
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Embodiment 1

[0021] figure 1 It is a flow chart of a method for controlling a marine hybrid power unit provided in Embodiment 1 of the present invention. The method can be executed by a hybrid power unit configured on a ship, for example, by a voltage converter configured in a hybrid power unit. Such as figure 1 As shown, the method specifically includes:

[0022] S110. The voltage converter of the fuel cell receives a required power command.

[0023] Wherein, the voltage converter of the fuel cell detects the output power of the fuel cell in real time, and receives the required power instruction Pref. The required power command Pref can be output by the ship's power station management system. Specifically, the power management system of the ship sends the required power at the load end of the ship to the voltage converter of the fuel cell, and the voltage converter of the fuel cell dynamically controls the output power of the fuel cell according to the required power at the load end. ...

Embodiment 2

[0037] figure 2 It is a flow chart of a control method of a marine hybrid power unit provided by Embodiment 2 of the present invention. This embodiment optimizes the control method of a lithium battery on the basis of the above embodiment. This method can be configured by a hybrid power unit on board unit to execute, such as figure 2 As shown, the method specifically includes:

[0038] S210. The voltage converter of the fuel cell receives a required power command.

[0039] S220. If the required power does not exceed the rated power of the fuel cell, control the fuel cell to output power meeting the load requirement.

[0040] S230. If the bus voltage is less than the low-voltage threshold, control the lithium battery to output the fluctuating power, so as to adjust the bus voltage through discharge;

[0041] Correspondingly, if the bus voltage is greater than the high voltage threshold, the lithium battery is controlled to absorb the fluctuating power, so as to adjust the ...

Embodiment 3

[0056] image 3 It is a flow chart of a control method for a marine hybrid power unit provided by Embodiment 3 of the present invention. On the basis of the above embodiments, this embodiment optimizes the situation that the output of the fuel cell cannot meet the load power demand. This method can be obtained by Hybrid units configured on board to perform, as image 3 As shown, the method specifically includes:

[0057] S310. The voltage converter of the fuel cell receives a required power instruction.

[0058] S320. If the required power does not exceed the rated power of the fuel cell, control the fuel cell to output power meeting the load requirement.

[0059] S330. The voltage converter of the lithium battery determines fluctuating power according to the change value of the bus voltage, and controls the lithium battery to output or absorb the fluctuating power.

[0060] S340. If the required power exceeds the rated power of the fuel cell, the voltage converter of the f...

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Abstract

The embodiment of the invention discloses a control method for a marine hybrid power unit, a power unit and a power system. The hybrid power unit comprises a lithium battery and a fuel cell. The control method comprises the steps that a voltage converter of the fuel cell receives a demand power command; if the demand power does not exceed the rated power of the fuel cell, the fuel cell is controlled to output power satisfying the load demand; and a voltage converter of the lithium battery determines the fluctuation power according to the change value of the bus voltage and controls the lithium battery to output or absorb the fluctuation power. According to the control method for the marine hybrid power unit, the power unit and the power system, the fuel cell and the lithium battery are combined to form the hybrid power unit, and the fuel cell and the lithium battery are controlled through the voltage converters, so that the fuel cell outputs the power meeting the load demand, and the lithium battery is controlled to switch the working mode according to the change of the bus voltage so as to output the difference power or absorb the surplus power, the bus voltage is kept within the rated voltage range, and therefore the power meeting the requirements of a ship is output in real time.

Description

technical field [0001] Embodiments of the present invention relate to clean energy technologies, and in particular to a control method, a power unit and a power system for a marine hybrid power unit. Background technique [0002] The application of new clean energy on ships has broad prospects. For example, the hydrogen fuel cell product is water, which can basically achieve zero emissions, and its application is not limited by environmental conditions. The high energy density has a high cruising range, which can meet the power requirements of long-distance navigation of ships. However, at present, the power of ships is still dominated by traditional diesel engines. There is no application of fuel cells on ships in China, and the use of fuel cells alone cannot meet the real-time demand for power of ships under different working conditions. Contents of the invention [0003] The invention provides a control method, a power unit and a power system of a marine hybrid power u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L58/40
CPCB60L2200/32B60L58/40Y02T10/70
Inventor 罗鹏王希炜
Owner CSSC POWER INST CO LTD
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