Shore power supply system for ships and power supply method thereof
A technology of electrical systems and ships, applied in the field of electric power, can solve the problems of inability to realize power consumption on land and ships, and needs to be improved, and achieve the effects of suppressing neutral point drift, ensuring continuous power supply, and rapid conversion
Active Publication Date: 2010-12-15
中国人民解放军91053部队 +1
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Problems solved by technology
[0004] The problem to be solved by the present invention is: the current ship shore power technology cannot realize the simultaneous sharing of land power consumption and ship power consumption, the utilization rate of the shore power system is low, and the safety and stability of the shore power system need to be improved
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[0015] The present invention provides a ship shore power compatible system solution that can not only provide three-phase three-wire power supply for the ship when it is docked, but also provide three-phase four-wire plus protection line system for the land-use electrical equipment of the port wharf, such as figure 1 As shown, the ship shore power system of the present invention includes a transformer B, and a parallel grounding impedance Z and a grounding circuit breaker QF are provided between the low-voltage side of the transformer B and the grounding point 4 , total circuit breaker QF 1 , land load circuit breaker QF 2 , marine load circuit breaker QF 3 , neutral line N, protective earth line PE. The land power load and the ship power load are connected in parallel, through the main circuit breaker QF 1 Connect with the low-voltage side of the transformer, in which the land power load is connected with the main circuit breaker QF 1 There is a land load circuit breaker ...
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The invention discloses a shore power supply system for ships and a power supply method thereof. The shore power supply system comprises a transformer, power load for land, and power load for ships, wherein the low-voltage side of the transformer is grounded through a grounded circuit breaker and a grounded impedance which are connected in parallel; the power load for land and the power load for ships are connected in parallel and are connected with the low-voltage side of the transformer; a circuit breaker of the power load for land is arranged between the power load for land and the transformer; a circuit breaker of the power load for ships is arranged between the power load for ships and the transformer; and the grounded circuit breaker and the circuit breaker of the power load for land are interlocked. When no ship pulls in the shore to use the shore power supply system, the grounded circuit breaker is switched on, so that the grounded impedance is in short circuit, and the shore power supply system supplies power to the power load for land; and when a ship pulls in the shore to use the shore power supply system, the circuit breaker of the power load for ships is switched on, the grounded circuit breaker is switched off, the shore power supply system is grounded through the grounded impedance, and the power load for land and the power load for ships share the same shore power supply system. The shore power supply system has the advantages of rapid switch of power supply modes, reliable work, comprehensive protection means, and capacity of improving the utilization efficiency and working security and stability of the shore power supply system.
Description
technical field [0001] The invention belongs to the technical field of electric power, relates to ship shore power technology, and relates to a ship shore power system and a power supply method thereof. Background technique [0002] Ship shore power technology is a power supply technology used when ships are docked. At present, ship shore power technology generally adopts the method of separately setting up a neutral point ungrounded IT system for ship power consumption, or cutting off the land load when the ship is docked, and using the land use neutral point grounded TN system to supply power to the ship. Although the first method is reliable, when the ship is not docked, the shore power system is idle, causing great waste; although the second method is economical, when the ship is docked for power consumption, the power consumption of land loads The system will stop working, and because the shore power system adopts the neutral point directly grounded TN system, once the...
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IPC IPC(8): H02J3/00
Inventor 叶晓松王金全吴振飞邢鸣
Owner 中国人民解放军91053部队
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