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Research on Design and Control of Microgrid SystemResearch on Design and Control of Microgrid SystemResearch on Design and Control of Microgrid System

100%

Che Y. , Chen J.

Przegląd Elektrotechniczny

2012

tom R. 88, nr 5b

83-86

Microgrid system has received more and more attention internationally in recent years. As the most effective form of distributed generations, microgrid system has also found wide applications in many areas. In this paper, the optimal configuration issue of microgrid system is described briefly first. And then the monitoring system of microgrid system is discussed in details. Different control methods of microgrid system and their advantages and shortcomings are analyzed later. The comparative analysis of different control methods is carried out. Finally, a laboratoryscale microgrid system is proposed as an example to verify the microgrid control strategy. The operation experimental results show that the laboratory-scale microgrid system can operate in grid-connected or islanded mode, with a seamless transfer from one mode to the other, and hence increase the reliability of energy supplies. The study can be used to guide the research of microgrid systems.

Zaprezentowano różne rozwiązania sieci typu microgrid. Zaproponowano metody sterowania i kontroli systemem, metody optymalizacji konfiguracji oraz systemy monitoringu.

The Design of MPPT Controller in Photovoltaic System

80%

Che Y. , Zhang W. , Li W.

2013

tom R. 89, nr 3b

71--73

In photovoltaic power system, the maximum power point changes under different circumstances, so it is meaningful to track the unique point to provide maximum power for the load. In this paper, we designed the main circuit and control circuit of the maximum power point tracking controller. This controller uses the observation and perturbation method to achieve the maximum power point tracking. At last we tested the efficiency of the controller, the experimental result demonstrates that the system tracks the maximum power point rapidly, works safely and reliably.

W artykule przedstawiono projekt elektronicznego sterownika do śledzenia punktu mocy maksymalnej. Budowę urządzenia oparto na teorii obserwacji i perturbacji. Zawarte wyniki eksperymentalne potwierdzają skuteczność śledzenia i szybkość reakcji na zmiany w systemie PV.

Modeling and analysis of 12-pulse inverter in shipboard or aircraft

70%

Che Y. , Zhou J. , Liu G. , Xu J. , Zhao Y.

2017

tom S 3

136--142

With the development of DC distribution system within the isolated power system of a ship or an aircraft, more constant frequency loads will be supplied by inverters connected to DC main bus. In the operating mode conversion process of an isolated power system, inverters will inevitably suffer from serious disturbance and affect the stability of the system. Therefore, it is important to establish a model of the inverter that reflects its dynamic characteristics and based on which to conduct the stability analysis. This paper proposes a 12-pulse inverter model based on the generalized state space averaging (GSSA) method. This model can overcome the limitations of 12-pulse inverter state space averaging (SSA) model in transient analysis with good accuracy and fast analysis ability effectively. Three kinds of models for a 12-pulse aircraft inverter are built in MATLAB, namely GSSA model, SSA model and detail device model. The simulation results show the high accuracy of GSSA model in stability analysis. This study provides an effective analytical tool for stability analysis of 12-pulse inverter and also provides a reference for inverter modeling research of isolated power system such as in aircraft or ship.