Green port distributed energy pre-grid-connection control method

Abstract

The invention discloses a green port distributed energy pre-grid-connection control method, and relates to the technical field of port energy control. Firstly, virtual reactive power on virtual reactance is calculated according to dq coordinate axis voltage components on the two sides of a distributed energy grid-connected point; then, virtual reactive power is controlled through an intelligent self-learning PID controller to obtain an inverter error compensation angular frequency and an inverter error compensation voltage amplitude; respectively introducing the inverter error compensation angular frequency and the inverter error compensation voltage amplitude into an active frequency modulation control loop and a reactive voltage regulation control loop in a virtual synchronous generator control algorithm; and finally, pre-grid-connected control is realized by controlling the amplitude and phase of the output voltage of the distributed energy inverter to be synchronous with the amplitude and phase of the voltage of the ship power grid. According to the invention, the generation problem of grid-connected impact current when the port distributed energy is connected to the port comprehensive power supply system is solved, and the rapidity and stability of the port distributed energy grid-connected process are improved.

Description

technical field [0001] The invention belongs to the technical field of port energy control, and in particular relates to a pre-grid control method for green port distributed energy. Background technique [0002] Green port is based on green environmental protection as the guiding concept, building a sustainable dynamic balance between the environment and economic development, realizing the rational use of resources, low pollution, and low energy consumption of new ports. During the ship's berthing operation, the four-stroke diesel generator mainly relies on the ship's four-stroke diesel generator to maintain various equipment on the ship and the power required for daily life. The large amount of carbon dioxide, sulfide and nitrogen emitted by it will cause serious pollution to the port area. Therefore, it is particularly important to build a smart green energy platform and realize the green, low-carbon and circular development of the port through the establishment of ship po...

AI Technical Summary

Problems solved by technology

[0007] The present invention considers the problem of the grid-connected impact current generated during the period when the wave energy and other distributed energy resources in the port participate in the energy dispatching and load distribution of the berthing ships when the large-scale merchant ship is in port, and the traditional pre-grid control method has poor control accuracy and transition For the problem of long process time, a green port distributed energy pre-grid control method is provided to improve the grid-connected impact current generated when the port distributed energy is connected to the comprehensive power supply system of the port, so as to realize the rapid, stable and parallel operation of the port distributed energy. network

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