Ship shore power control system based on virtual synchronous generator technology

A shore power supply and virtual synchronization technology, which is applied in the direction of reducing/preventing power oscillations, can solve problems such as slow response and poor dynamic response performance, and achieve the effects of smoothing shocks, reducing oscillation amplitude, and stabilizing output

Active Publication Date: 2020-11-27
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method solves the problems of slow response and poor dynamic response performance caused by fixed and high inertia constants, and coordinates the contradiction between balance stability and dynamic characteristics according to the frequency deviation

Method used

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  • Ship shore power control system based on virtual synchronous generator technology
  • Ship shore power control system based on virtual synchronous generator technology
  • Ship shore power control system based on virtual synchronous generator technology

Examples

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Embodiment Construction

[0020] Such as figure 1 As shown, it is a schematic diagram of the shore power frequency conversion system model, including the frequency converter and the output side isolation transformer. The system can adapt to the power demand of ships in port and provide the normal access service of the shore power supply. Each berth is provided with shore power by a set of variable voltage and frequency conversion devices.

[0021] In this embodiment, the shore power frequency converter adopts a plurality of independent H-bridge power units in series to realize high-voltage output, including a phase-shifting transformer and a power unit, wherein: the power unit includes a rectification unit and an inverter unit.

[0022] Such as figure 2 As shown, taking the 24-pulse frequency converter as an example, the phase-shifting transformer adopts multiple designs to transform the high voltage on the grid side into multiple sets of low voltage on the secondary side. A fixed phase difference i...

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Abstract

The invention discloses a ship shore power control system based on the virtual synchronous generator technology. The control system comprises an energy management layer, a VSG control layer and a voltage current control layer, which are connected in sequence. The energy management layer receives a power command of a central manager to adjust the whole system, and the VSG control layer receives theactive power and reactive power sent by a central controller to set reference values Pref and Qref, performs the calculation to form a machine terminal reference voltage amplitude E and phase angle delta and finally obtains a three-phase voltage amplitude reference value U* command through a three-phase sine generator. The voltage current control layer tracks the VSG control layer and samples theshore power supply output feedback to improve control performance. The system can suppress the impact of the power source switching and the ship load fluctuation on a shore power source, and has goodscheduling property, so that the shore power source becomes a grid-friendly power source with strong adaptability, and has good application prospects.

Description

technical field [0001] The invention relates to a technology in the field of power grid intelligent control, in particular to a ship shore power control system based on virtual synchronous generator technology. Background technique [0002] Nowadays, the frequency of foreign ship power grids is mostly 60Hz, while the frequency of my country's port power grid is 50Hz. Therefore, it is necessary to study the shore power conversion technology suitable for my country's power system, and convert the AC power of my country's port power grids into 60Hz AC power suitable for foreign ships, and realize 50Hz / 60Hz dual frequency at the same time. powered by. The frequency conversion shore power supply using the traditional inverter control method will bring impact when it is integrated into the ship power grid because of the difference in output characteristics and adjustment operation with the traditional diesel generator set. Therefore, in order to make the power electronic inverter ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24
CPCH02J3/24
Inventor 赖单宏黎洪光陈文炜郑欣彭灵利王劲锋张新民梁立峰唐成林亚培李英锋刘晓阳于博文黄文焘吴攀
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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