Title :
Control options for a bi-directional multilevel traction chopper
Author :
Wilkinson, Richardt H. ; Horn, Abram ; Enslin, Johan H R
Author_Institution :
Dept. of Electr. & Electron. Eng., Stellenbosch Univ., South Africa
Abstract :
A high power bi-directional multilevel chopper is developed as a design prototype for an inverting DC traction substation with active power filtering incorporated. The “imbricated cells multilevel chopper” topology is put into practise, where capacitors are used as floating voltage sources. Control options for this chopper are discussed and simulation results are compared. Differences between analog and digital control are also highlighted as a DSP-implemented control strategy is considered for duty-cycle control in the final system
Keywords :
DC-DC power convertors; active filters; bipolar transistor switches; choppers (circuits); control system analysis; harmonic distortion; insulated gate bipolar transistors; power bipolar transistors; power filters; power semiconductor switches; power system harmonics; rail traffic; railways; substations; traction; traffic control; voltage control; DC traction substation; DC/DC power conversion; DSP control strategy; IGBT chopper circuit; active power filtering; analogue control; bidirectional multilevel traction chopper; design prototype; digital control; duty-cycle control; floating voltage sources; imbricated cells multilevel chopper; Active filters; Bidirectional control; Capacitors; Choppers; Control systems; Digital control; Prototypes; Substations; Topology; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 1996. PESC '96 Record., 27th Annual IEEE
Conference_Location :
Baveno
Print_ISBN :
0-7803-3500-7
DOI :
10.1109/PESC.1996.548764
