A dynamic real-time simulation method for ship power system

Abstract

The present invention discloses a ship electric power system dynamic real-time simulation method. The method comprises the following processes: firstly, acquiring a state of each generator in a ship electric power system; secondly, calculating a rotating speed and a q-axis transient internal voltage of each generator, and separately transforming the q-axis transient internal voltages of all the generators from a dq0 coordinate to a same xy0 synchronous coordinate system; converting a voltage source of each generator into a current source; determining a network topology structure of the ship electric power system; according to the network topology structure of the ship electric power system, dividing the electric power system into a plurality of sub-networks, and calculating parameters of each generator, each bus-bar and each load in each sub-network according to current source parameters; and outputting and displaying calculation results. According to the ship electric power system dynamic real-time simulation method of the present invention, dynamic and steady-state process of the ship electric power system can be simulated in real time, and the needs of real-time simulation of multi-node, dense-structure independent complex electric power systems of large ships can be completely met.

Description

technical field [0001] The invention belongs to the technical field of ship power systems, and in particular relates to a dynamic real-time simulation method for ship power systems. Background technique [0002] The ship power system is an independent power system, which is different from the land infinite power grid. Its core is a synchronous generator set driven by prime movers such as diesel engines and steam turbines, and its capacity is relatively much smaller. The system has many types of electrical loads, a relatively large dynamic range, and the dynamic process of the system changes frequently and complexly. Therefore, its dynamic characteristics mainly depend on the joint action of the generator set and the load. Due to the characteristics of safety, efficiency, economy, and repeatable operation, simulation technology has gradually become more important and widely used. [0003] At present, two kinds of simulation methods are generally used to study ship power syst...

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Problems solved by technology

[0003] At present, two kinds of simulation methods are generally used to study ship power systems. One is to study ship power systems by physical or hybrid simulation methods, but this method is not only complicated and difficult to implement, but also has high cost and poor flexibility; It is an all-digital simulation method. This method has the advantage of not being restricted by the size and complexity of the simulation object. While ensuring the safety of the simulation test, it is also very economical and easy to operate, but the simulation accuracy meets the requirements of the real-time simulation method. Poor, can not simulate the dynamic process of large ship multi-node, dense structure independent complex power system in real time; and the simulation method that meets the real-time requirements cannot correctly simulate the dynamic process of large ship multi-node, dense structure independent complex power system in real time

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