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Full-Text Articles in Engineering
Extended Operation Of Flying Capacitor Multilevel Inverters, Jing Huang, Keith Corzine
Extended Operation Of Flying Capacitor Multilevel Inverters, Jing Huang, Keith Corzine
Electrical and Computer Engineering Faculty Research & Creative Works
Recent research in flying capacitor multilevel inverters (FCMIs) has shown that the number of voltage levels can be extended by changing the ratio of the capacitor voltages. For the three-cell FCMI, four levels of operation are expected if the traditional ratio of the capacitor voltages is 1:2:3. However, by altering the ratio, the inverter can operate as a five-, six-, seven-, or eight-level inverter. According to previous research, the eight-level case is referred to as maximally distended (or full binary combination schema) since it utilizes all possible transistor switching states. However, this case does not have enough per-phase redundancy to …
Multilevel Inverters With Equal Or Unequal Sources For Dual-Frequency Induction Heating, B. Diong, S. Basireddy, Keith Corzine, Yakov L. Familiant
Multilevel Inverters With Equal Or Unequal Sources For Dual-Frequency Induction Heating, B. Diong, S. Basireddy, Keith Corzine, Yakov L. Familiant
Electrical and Computer Engineering Faculty Research & Creative Works
Most existing power supplies for induction heating equipment produce voltage at a single (adjustable) frequency. Recently, however, induction heating power supplies that produce voltage at two (adjustable) frequencies have been researched and even commercialized. Dual-frequency power supplies are a significant development for heat-treating workpieces with uneven geometries, such as gears, since different portions of such workpieces are heated dissimilarly at a single frequency and so require a two step process using a single-frequency power supply. On the other hand, a dual-frequency power supply can achieve the desired result for such workpieces in a one step process. This paper proposes the …
Control Of Cascaded Multilevel Inverters, Keith Corzine, M. W. Wielebski, Fang Zheng Peng, Jin Wang
Control Of Cascaded Multilevel Inverters, Keith Corzine, M. W. Wielebski, Fang Zheng Peng, Jin Wang
Electrical and Computer Engineering Faculty Research & Creative Works
A new type of multilevel inverter is introduced which is created by cascading two three-phase three-level inverters using the load connection, but requires only one dc voltage source. This new inverter can operate as a seven-level inverter and naturally splits the power conversion into a higher-voltage lower-frequency inverter and a lower-voltage higher-frequency inverter. This type of system presents particular advantages to Naval ship propulsion systems which rely on high power quality, survivable drives. New control methods are described involving both joint and separate control of the individual three-level inverters. Simulation results demonstrate the effectiveness of both controls. A laboratory set-up …
A Multi-Processor Control System Architecture For A Cascaded Statcom With Energy Storage, Chang Qian, Stan Atcitty, Mariesa Crow
A Multi-Processor Control System Architecture For A Cascaded Statcom With Energy Storage, Chang Qian, Stan Atcitty, Mariesa Crow
Electrical and Computer Engineering Faculty Research & Creative Works
This paper presents a multi-processor control system for a general purpose five-level cascaded inverter for real time power system applications. Practical design considerations for the digital controller architecture as well as the power converter are discussed and a 3 kVA laboratory prototype is presented. As a case study, a StatCom with battery energy storage was implemented on this multi-processor controlled inverter system. To eliminate the troublesome PI parameter tuning and the limitation of small signal models, which exist in conventional control for StatComs, a new and simple control method based on large signal model was designed to realize four-quadrant power …
A Unique Fault-Tolerant Design For Flying Capacitor Multilevel Inverter, Xiaomin Kou, Keith Corzine, Yakov L. Familiant
A Unique Fault-Tolerant Design For Flying Capacitor Multilevel Inverter, Xiaomin Kou, Keith Corzine, Yakov L. Familiant
Electrical and Computer Engineering Faculty Research & Creative Works
This paper presents a unique design for flying capacitor type multilevel inverters with fault-tolerant features. When a single-switch fault per phase occurs, the new design can still provide the same number of converting levels by shorting the fault power semiconductors and reconfiguring the gate controls. The most attractive point of the proposed design is that it can undertake the single-switch fault per phase without sacrificing power converting quality. Future more, if multiple faults occur in different phases and each phase have only one fault switch, the proposed design can still conditionally provide consistent voltage converting levels. This paper will also …
Neuroidentification Of System Parameters Of The Upfc In A Multimachine Power System, Radha P. Kalyani, Ganesh K. Venayagamoorthy
Neuroidentification Of System Parameters Of The Upfc In A Multimachine Power System, Radha P. Kalyani, Ganesh K. Venayagamoorthy
Electrical and Computer Engineering Faculty Research & Creative Works
The crucial factor affecting the modern power systems today is load flow control. The Unified Power Flow Controller is an effective means for controlling the power flow. The UPFC is controlled conventionally using PI controllers. This paper presents the designs of neuroidentifiers that models the system dynamics one-time step ahead making the pathway for the design of adaptive neurocontrollers. Two neuroidentifiers are used for identifying the nonlinear dynamics of a multimachine power system and UPFC, one neuroidentifier for the shunt inverter and another for the series inverter. Simulation results carried out in the PSCAD/EMTDC environments on multimachine power system are …