New Three-phase Emergency Power Supply Control Method

This paper proposed a novel three-phase emergency power supply(EPS) in order to overcome the limits of traditional emergency power supply. This EPS system is composed of bidirectional PWM converters. By using DSP digital control technique , this system can realize two functions: supplying the load with emergency power and compensating current harmonics and reactive power generated from the nonlinear load. This EPS system realized the requirements of "green", intelligent and low cost.This paper put emphasis on the control strategy of this novel three-phase emergency power supply and design a control system based on a TI's digital signal processor — TMS320LF2407A.Chapter one proposes the novel three-phase emergency power supply system on the basis of the characteristics and limits of the traditional emergency power supply systems. Then the pulse width modulation (PWM) technique is also introduced.Chapter two firstly introduces the foundation of which we present this novel emergency power supply system. Secondly, the circuit structure and the operating principles are illustrated. At last ,the applications of this novel three-phase emergency power supply are introduced in brief.Chapter three illuminates the control strategy of this EPS system in detail. This chapter introduces the control strategies of three circuit — inverter , shunt active power filter (APF),battery charger and discharger .Base on these analyses the parameters design of the proto type are proposed.Chapter four introduces the software and hardware design of the control systems.Chapter five introduces the 10KVA experiment system and analyzes the results of the experiment.