Jingyun Liu

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Voltage balance issue of dc-link capacitors is very important for applications of a cascade multilevel converter or a modular multilevel converter. In this paper, a novel diode-clamped modular multilevel converter (DCM2C) topology is proposed and a power feedback control method is developed. With the developed control strategy, the proposed diode-clamped(More)
The purpose of this study is to develop and test a real-time monitoring and controlling system for grain storage. Because ZigBee/IEEE802.15.4 indicates a network system which is highly reliable, cost-effective, low power consumption, programmable and fast establishing, we use ZigBee technology into this system for industry and research applications. The(More)
With the popularization of air conditioning system (A/C) in reality, A/C system control problems are focused on. This article presents a survey of different automatic control techniques that have been applied in A/C systems. Characteristics of the A/C systems are described and variables that should be controlled are discussed. A classification of the(More)
This paper presents the problem of designing and testing advanced monitoring and modeling experimental system for stored grain. Firstly, system configuration is described and functions are discussed in detail. Then, accuracies of different sensors used in this system and pressure distribution uniformity are tested. In particular, a monitoring-ventilation(More)
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