Grid power conversion and voltage stabilization 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 power conversion technology in the field of electrical engineering, and is a device that converts the domestic power grid power into other international power sources of different standards and keeps the voltage stable when the load changes. Background technique [0002] In large ports or wharves, the bustling ships bring economic benefits but also bring huge pollution. Ships docking at docks can generally use shore power to supply power, but due to different domestic and foreign power grid systems, such as Japan’s power supply is 100V, European power supply is 127V, 230V, etc., so there is a matching problem. At present, ships in various countries still use diesel as the main energy source. It has its own generator to generate electricity, so the pollution of the port from diesel emissions is particularly serious. With increasing emphasis on environmental protection, the use of clean energy to power ships has become the o...

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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