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
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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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