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Modular Multilevel Converters(MMCs) are considered to be state-of-the-art power converters for high voltage applications. MMCs typically consist of a stack of capacitor-switch assemblies (known as sub-modules), and requires voltage balancing control of multiple floating capacitors. To make these control decisions accurate, it is necessary to have precise knowledge about voltages across each of these...
The control of modular multilevel converter (MMC) is quite challenging and demands a flexible approach to achieve multiple control objectives. The model predictive control (MPC) is highly effective and suitable to control the MMC. The control objectives are included in a single cost function and evaluated for all possible switching states. The switching state which minimizes cost function is selected...
Smart grid technologies are expected to increase system efficiency and reliability using advancement in automation, communication, computation and optimization. Several control algorithms have been developed or enhanced for operation and control of smart distribution grid including Fault Detection, Isolation and service Restoration (FDIR), Optimal Feeder Reconfiguration (OFR), and Volt/Var Control...
This paper proposes a model predictive control (MPC) strategy for a nested neutral point clamped (NNPC) converter. The NNPC converter is a four-level topology that is very attractive for medium-voltage (MV) applications. This is because it has less number of components in compare to other classic four-level topologies. In this paper, the MPC strategy is developed for the NNPC converter to control...
We examine the feasibility of an attack on the measurements that will be used by integrated volt-var control (VVC) in future smart power distribution systems. The analysis is performed under a variety of assumptions of adversary capability regarding knowledge of details of the VVC algorithm used, system topology, access to actual measurements, and ability to corrupt measurements. The adversary also...
A novel converter, named as negative-output KY boost converter, is presented herein, which needs one additional capacitor and one additional diode as compared to the boost converter. In the following, the basic operating principle of the proposed converter is illustrated in detail, together with some simulated and experimental results to verify its effectiveness.
This paper is concerned with the design and simulation of a pulse width modulation (PWM) rectifier for three-phase Permanent Magnetic motor drive. Based on the mathematical model of PWM rectifier, the dual-close-loop engineering design with decoupled feed-forward control is applied in the 3-phase voltage source rectifier. The objective to be reached is to realize unity power factor at the input ac...
The next generation of wireless communication is a ubiquitous radio system concept, providing wireless access from short-range to wide-area, with one single reconfigurable and adaptive system for all envisaged radio environments. This paper presents the design approach of RCO (reconfigurable concurrent oscillator) that simultaneously generates two or more signals of different frequencies that eliminate...
With advancement of recent high-speed switching devices, PWM inverters are operated in high frequencies and often generate EMI noises due to common-mode leakage currents. There are mainly two types of leakage currents. One is inverter leakage currents due to parasitic capacitances between switching devices and heat sinks. The other is load leakage currents due to parasitic capacitances between the...
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