Intelligent compensation energy-saving system of metal electrolysis smelting power grid

Abstract

The invention discloses an intelligent compensation energy-saving system of a metal electrolysis smelting power grid. The intelligent compensation energy-saving system comprises a grid-connected inductance transformer, a power grid detection device, a smelting load detection device, an A / D converter, a harmonic / active power conversion device, a reactive power phase shift controller, a magnetic energy / active power conversion device, a harmonic reactive power compensation device, a system protection device, a system controller and a magnetic energy / electric energy conversion device. The system controller is used for controlling the harmonic / active power converter, the reactive power phase shift controller, the DC magnetic energy / electric energy conversion device and the harmonic reactive power compensation device to achieve the conversion to active power from harmonic power, the reactive power phase shift controller is used for shifting power grid reactive power to active power, huge DC electromagnetic field energy generated by a DC power transmission bus of a smelting rectification transformer is converted to AC active power to be sent back to a power grid, residual harmonic and reactive power of the power grid are compensated, and the power grid quality and the stability and the safety of the power grid and the metal smelting system are improved.

Description

technical field [0001] The invention relates to a compensation and energy-saving system in the technical field of power electronic control, in particular to an intelligent compensation and energy-saving system for a metal electrolysis and smelting power grid, a DC power supply network, and energy-saving and emission-reducing metal electrolysis and smelting power grids for high-energy-consuming enterprises. Background technique [0002] With the rapid development of China's metal smelting system and the development plan of China's Belt and Road Initiative, the output of metals such as steel and aluminum in China has grown to more than 50% of the world's output. The rapid development of the metal smelting industry has seriously affected the environmental pollution of the power grid. It is the scientific community important current research topics. Due to the special operating state of the metal smelting system, it has caused great impact and fluctuations on the power grid, and...

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Problems solved by technology

The filter includes a primary system part and a secondary system part. The primary system part includes active and passive filters connected in series, but cannot withstand the fundamental wave voltage of the grid AC power supply, and the device has a small capacity and cannot be used for high voltage and large capacity. Power Systems

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