Network source converting and voltage-stabilizing device

Abstract

The invention relates to a network source converting and voltage-stabilizing device which is used for converting a domestic network source into other international different standards of power supplies and stabilizing the voltage when a load changes. An electric motor is powered by the network source; the electric motor is connected with a three-phase alternating current (AC) generator through a coupling so as to realize the conversion of the network source; and the size of an excitation current in an excitation coil of the generator is controlled by the device when the load changes, so that the change of the output voltage of the generator caused by the load is compensated. The network source converting and voltage-stabilizing device comprises a transformer, a voltage amplitude detection circuit, a voltage frequency detection circuit, a load current detection circuit, a manual control circuit, a main controller, an IGBT (Insulated Gate Bipolar Transistor) driving circuit, an IGBT driving module, an adder circuit, a display system and a remote monitoring system. According to the network source converting and voltage-stabilizing device, the conversion efficiency is high, the voltage of an output power supply is stable, and the network source converting and voltage-stabilizing device can be remotely monitored, so that the network source converting and voltage-stabilizing device has the advantages of high safety, strong practicability, and easiness for the promotion and application in port ultra-high-power grid power conversion plants.

Description

technical field [0001] The invention belongs to the electric power conversion technology in the field of electric engineering, and is a device for converting domestic power grid power into other different international standard power sources and maintaining voltage stability when the load changes. Background technique [0002] In large ports or docks, the hustle and bustle of ships not only brings economic benefits, but also brings huge pollution. Ships berthing at wharves can generally be powered by shore power. However, due to the different power grid systems at home and abroad, for example, the power supply in Japan is 100V, and the power supply in Europe is 127V, 230V, etc., so there is a matching problem. Its own generators generate electricity, so diesel emissions are particularly polluting to the port. With the increasing emphasis on environmental protection, using clean energy to power ships has become the only solution. Because all kinds of clean energy are finall...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a power grid power conversion and voltage stabilization device to solve the problems of power grid pollution, high cost, and low conversion efficiency in the existing method of using frequency converters for power grid power conversion.

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