Research Of High Frequency AC Distributed Power System Based On Series-parallel Resonant

On one hand, in the communication and computer systems, the requirements for the power supply become more and more stricter, on the other hand traditional DC power distribution system has the disadvantages of too many power converting stages and bad dynamic response, which, as a result, makes it difficult to meet the standards of the power supply of powerful processors. High frequency AC power distribution system, as a new method of distribution, has its advantages of high power intensity, quick transient response and easy realization of electric isolation, which makes a lot of fields such as aviation and Smart Electrical Energy Networks pay a lot of close attention.The paper firstly introduces the developments of high frequency AC power distribution technology both at home and abroad and highlights its advantages by comparing two distribution methods. On this basis, sophisticated analysis is made on the high frequency AC distribution system, including the operating principle, the construction of the system, the controlling method and reliability of operation. Also hardware circuits are established to realize the function and validate the theory analyzed above fatherly. At last, two methods are introduced to promote the loading capacity and power factor.The paper mainly does profound researches on the front stage DC/DC converter and back stage series-parallel resonant inverter in high frequency AC power distribution system. As for the front stage Buck, dynamic small signal mathematical model is established first. And then the combination of the theory and experiments helps to determine the main power parameters and analyze the open loop characteristics. What's more, the analog controlling method is also put into use to make the 3 order compensation for the topology. At last, experiment results are obtained to validate the design.As for the back stage high frequency inverter, half bridge resonance is firstly introduced to make DC into high qualified AC sinusoidal. And then sophisticated analysis on the pulse phase regulation of the AC bus is done. Besides, Saber simulation results validate that logic circuits can regulate the phase of sinusoidal. At last, on the basis of the high frequency inverter small signal model, Matlab simulation deliberates the methods to promote the system performance.The experiments can validate the topology and controlling method. What is more, to satisfy the system loading capacity, multiple inverters and increased the main bus frequency are introduced, which is also validated by the experiment results. At last, the resonance rectifier method is brought into improve the power factor of back stage AC voltage regulation module.