Grid-connected control method and grid-connected control device
A technology of a control device and a control method, applied in the field of control, can solve the problems of inrush current of the DC public power grid, damage to the components of the ship's power supply system, and affect the reliable operation of the ship's power supply system, so as to reduce the inrush current and ensure reliable operation. Effect
Pending Publication Date: 2021-09-03
SHANGHAI SIGRINER STEP ELECTRIC
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Problems solved by technology
[0003] At present, when the power supply equipment is integrated into the DC public grid, due to the difference in the output voltage of different power supply equipment, there will be a surge current in the DC public grid, which will affect the parallel process of the power supply equipment, and even damage the ship. Devices in the power supply system affect the reliable operation of the ship's power supply system
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[0021]In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art can understand that in each embodiment of the present invention, many technical details are provided for readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in this application can also be realized. The division of the following embodiments is for the convenience of description, and should not constitute any limitation to the specific implementation of the present invention, and the various embodiments can be combined and referred to each other on the premise of no contradiction.
[0022] An embodiment of the present invention relates to a grid-connecte...
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The embodiment of the invention relates to the field of control, and discloses a grid-connected control method and a grid-connected control device. The grid-connected control method is applied to the grid-connected control device in an electric power system, the electric power system comprises first power supply equipment which is already connected into a direct current public power grid and second power supply equipment which needs to be connected into the direct current public power grid, the second power supply equipment is connected to the input end of a second voltage conversion unit, and the output end of the second voltage conversion unit is used for connecting a DC public power grid. When the method detects that the output voltage of the second voltage conversion unit is not equal to the voltage of the direct-current public power grid, the output voltage of the second voltage conversion unit is adjusted by dynamically adjusting the power droop curve of the second voltage conversion unit, and after the output voltage of the second voltage conversion unit is equal to the voltage of the direct-current public power grid, the second power supply equipment is connected into the direct-current public power grid, so that surge current generated by the direct-current public power grid due to grid-connected operation can be effectively reduced, and reliable operation of the ship power supply system is further ensured.
Description
technical field [0001] The embodiments of the present invention relate to the field of control, in particular to a grid-connected control method and a grid-connected control device. Background technique [0002] With the rapid development of the new energy ship industry in recent years, the concept of DC power grid has appeared in the ship power grid, which has many advantages compared with the traditional AC power grid. In the DC power grid, the power generation side is composed of generators, batteries and other power supply equipment. The energy on the power generation side can be converted to the DC public power grid through the power electronic conversion device. The load side is composed of other electrical equipment such as propeller motors. The power electronic conversion device obtains electric energy from the DC public grid. The power generation side usually includes multiple power supply devices. During the ship's shipping process, these power supply devices do n...
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IPC IPC(8): H02J1/10H02J1/02
CPCH02J1/102H02J1/02
Inventor 张盛王亮平
Owner SHANGHAI SIGRINER STEP ELECTRIC