A comprehensive digital protection device for marine power system
A power system and protection device technology, which is applied in the field of integrated digital protection devices for marine power systems, can solve problems such as harsh marine environments, and achieve the effects of strong versatility, improved selectivity, and convenient debugging.
Active Publication Date: 2016-01-06
SHANGHAI CSIC SHIP PROPULSION EQUIP CO LTD
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[0004] The present invention is aimed at the special requirements of marine electrical equipment, and proposes a comprehensive digital protection device for marine power systems. It adopts modular design and develops a power system protection device suitable for medium and low voltages and universal for AC and DC, so as to meet the requirements of The installation space in the cabin meets the harsh marine environment, the use requirements of special loads and special working conditions, and the use requirements of different voltage levels and the coexistence of AC and DC systems
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[0017] Such as figure 1 The schematic diagram of the hardware connection in the integrated digital protection device of the marine power system is shown: the power supply and switch interface boards are responsible for providing high-quality power for each board, as well as the input and output of switching signals; the sampling function board is responsible for collecting analog signals, After conditioning and amplification, it can be analyzed and processed by the centralized control board; the centralized control board completes the control operation, calls the configuration and fault information in the SD storage board when starting up, and analyzes and processes the input key control signals, digital signals, switch signals, etc. in real time. Communication signal, when there is a fault in the system, quickly make a judgment, output breaking and alarm signals; the human-machine display and control board obtains the interface display information through the centralized contr...
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The invention relates to a comprehensive digital protection device for a ship power system. The comprehensive digital protection device comprises a shell, a modularized power supply-switch interface plate part, a sampling function plate part, a centralized control plate part, a man-machine display control plate part, a multifunctional communication plate part and an SD (security digital) storage plate part, wherein the shell comprises a front cover plate, a cover, a central baffle and a rear cover plate; the front and rear cover plates are fixed to the cover through screws; the interior of the shell is divided into front and rear cabins by the central baffle; the centralized control plate part and the multifunctional plate part in the device are mounted in the front cabin; the sampling function plate part, the power supply-switch interface plate part are mounted in the rear cabin; an SD card is conveniently inserted in and pulled out; an SD card metal shield outside the SD storage plate part is fixed on the rear cover plate. The device adopts a modularization design and is strong in universality and convenient in debugging, fault waveform analysis and equipment replacement and upgrade through combination use of the plate parts; the use requirements of system protection and main backup protection are met and the selectivity and the protection sensitivity are improved.
Description
technical field [0001] The invention relates to a marine protection device, in particular to a comprehensive digital protection device for a marine power system. Background technique [0002] At present, my country's ships mainly use low-voltage AC systems, but with the development of technology, medium-voltage AC and medium-voltage DC are inevitable development trends. In the future, ships will have medium and low voltage voltage levels, and AC and DC systems coexist. With the continuous improvement of installed capacity and the increasingly complex power network of ships, special comprehensive power protection devices are required to protect the system. The large land power grid system has widely used digital relay protection devices for the power supply network, and many well-known foreign manufacturers have developed related protection devices. [0003] There are big differences between marine and land comprehensive protective devices in terms of operating environment r...
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IPC IPC(8): H02H1/00H05K5/02H05K7/06H05K7/20H05K9/00
Inventor 钟毅滢赵跃平王卿宇曹虎跃曹爽赵勇
Owner SHANGHAI CSIC SHIP PROPULSION EQUIP CO LTD