The Topology Of High-voltage Power Converter And Intelligent Control

At present, there are two puzzles or human beings, one is cavity of energy sources, the other is environment pollution. It is extremely important to economize energy sources before new ones are developed. In recent years variable speed drives in high voltage range are widely used in many industries such as water treatment, oil and natural gas industry, paper industry, etc. developed. High voltage multilevel inverters have the following advantages: high reliability high power factor high efficiency, low cost, low input and output harmonic, low common mode voltage and low dv/dt. Hence, it is significant to develop and popularize high voltage inverters to reduce industry energy waste.In several papers on high-voltage inverter topology on the basis of the highlights of the cascade multi-level inverters feature of the structure and working principle. Based on the converter topology control algorithms were compared with the analysis of the frequency converter for the cascade system to provide the theoretical basis and technological support. On this basis, in order to run the low-frequency high-voltage electric power factor of only 0.85 times or so, run the low-frequency harmonic point of comparison greatly, made intelligent use of advanced control technology for high-frequency electrical systems research and application of high-voltage motors Application of running adaptive control principle, so that the converter input current phase following the automatic voltage phase, so as to enhance the power factor close to 1, reaching energy-saving effect; low-frequency high-voltage electric light load operation, the application of genetic algorithm to optimize power factor, low-frequency solution to run-time power factor The lower the actual problem. The whole system easy to operate faster and achieve a stable production, reduce energy consumption, the main purpose of improving economic efficiency.