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Bidirectional DC-DC control method for hybrid power ship

A DC-DC, hybrid technology, applied in the direction of the engine using the combination of propulsion devices, etc.

Active Publication Date: 2013-09-25
SHANGHAI MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no control method for bidirectional DC-DC converters in hybrid ship electric propulsion systems in China

Method used

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  • Bidirectional DC-DC control method for hybrid power ship
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  • Bidirectional DC-DC control method for hybrid power ship

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Embodiment 1

[0018] The object of the present invention is to provide a kind of DC-DC (direct current-direct current) conversion method of hybrid ship, comprising the following steps:

[0019] The online state of the diesel generator set means that the AC-DC rectifier unit is put into operation, while the online state of the lithium battery means that the DC-DC converter is put into operation.

[0020] 1 Online working conditions: AC-DC online; DC-DC online; both AC-DC and DC-DC online; AC-DC and DC-DC offline.

[0021] 2 Put into working conditions:

[0022] (1) When the AC-DC is online, put the DC-DC into operation. At this point, the DC-DC is in power mode, with zero output power input, and then gradually increases to the desired output power. Among them, the command of expected power is given by PLC and sent to DC-DC through RS485 interface;

[0023] (2) When the DC-DC is online, put the AC-DC into operation. At this time, the DC-DC is converted from the direct mode to the power mo...

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PUM

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Abstract

The invention provides a bidirectional DC-DC control method for a hybrid power ship. According to the method, charge and discharge states of a marine lithium battery and charge and discharge current can be controlled by a bidirectional DC-DC converter, and energy distribution of the hybrid power ship can be more reasonable. The control method includes four mods and one state and includes automatic control, manual control and state transition. A control strategy includes that: when the operating modes are switched, a controller transmits a power request command to the bidirectional DC-DC converter so that the bidirectional DC-DC converter adjusts the output power in real time; when a hybrid power system operates, the output voltage of the bidirectional DC-DC converter is limited by direct-current bus voltage. The bidirectional DC-DC converter is provided with an RS485 interface and an analog and switching output interface, and the bidirectional DC-DC converter switches the operating modes under control of a PLC (programmable logic controller).

Description

technical field [0001] The invention relates to a multi-energy conversion and control method for a hybrid ship, in particular to a DC-DC (direct current-direct current) conversion control method for a hybrid ship. Background technique [0002] With the continuous development of the global economy, marine pollution has become one of the problems that threaten the living environment of human beings in the world today. Ship pollution accounts for a considerable proportion of marine environmental pollution. For the pollution caused by ships, the International Maritime Organization (IMO) and more and more countries and regions are actively taking various effective measures to reduce the pollution of the atmosphere caused by ship exhaust. Hybrid ship electric propulsion technology provides a feasible solution for ships to transition from traditional diesel engine propulsion to pure green propulsion. It has both the advantages of diesel-electric propulsion system and pure electric ...

Claims

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Application Information

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IPC IPC(8): B63H21/20
Inventor 高迪驹沈爱弟褚建新黄细霞孙彦琰
Owner SHANGHAI MARITIME UNIVERSITY
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