Method for inquiring heavy load of ship power station power management

Abstract

The invention discloses a method for inquiring heavy load of ship power station power management. The method presets an abrupt change quantity of power station load power and makes a reasonable judgment so as to avoid whole ship power off accidents caused by electric network breakdown due to abrupt changes of the load power and ensure the navigational safety of a ship. The method mainly comprises the following steps: calculating the gross capacity nPe of a generating set; calculating the actually output total power sigmaPi; calculating the potential change quantity Pa (Pa=Pmax-Po) of an input high-power load, wherein the Pmax is the rated power of the high-power load, and the Po is the initial power of the high-power load in running; calculating the value of P (P=nPe-sigmaPi-Pa-Ps), wherein the Ps is the power of a high-power load to be input; and judging whether the value of the P is larger than an allowed power margin D1, if so, allowing the high-power load to be started, otherwise, inputting a standby generator, and judging whether the high-power load is allowed to be started again.

Description

technical field [0001] The invention relates to a heavy-duty inquiry method for power management of a power station, in particular to a heavy-duty inquiry method for power management of a ship power station, and belongs to the technical field of ship power stations. Background technique [0002] The power management of the marine power station automatically starts and stops the diesel generator set according to the load condition of the power grid, so that the power station operates in the best state and achieves better economy. When the power margin of the grid is sufficient, the high-power load can be directly put into operation. When the power margin of the grid is not rich, the high-power load is allowed to start only after the backup generator is started and put into the grid operation. The existing power management method is reliable for the management of constant power loads (the load power is constant after starting operation), but there are disadvantages for the man...

AI Technical Summary

Problems solved by technology

The existing power management method is reliable for the management of constant power loads (the load power is constant after starting operation), but there are disadvantages for the management of heavy loads with large power changes. When asked, the existing power management method does not reserve enough power for the high-power loads that are already in the initial operating state (the power consumption in the initial operating state is often very small) and the power will change suddenly when calculating the power margin of the grid. That is, the potential power variation Pa of the high-power load is not considered. In this way, when the grid power margin is satisfied after calculation by the power management system, a start permission signal is sent to other high-power loads to start; if several units are in the initial operating power state When the next high-power load increases power at the same time, or when the next high-power load is allowed to start, or when the high-power load in the initial operating state suddenly increases power, the power station often has no time to put in the standby generator set, so that the running power generation The power grid collapsed due to the sudden increase of the load power of the unit, resulting in a power failure accident on the whole ship, resulting in serious consequences

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