Power and DC Link Voltage Control Considerations for Indirect AC/AC Modular Multilevel Converters
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This paper proposes an expert system approach for voltage and VAr control. A decentralized control mode is used so that each area performs its proper control using only its local information. It is obvious that the proposed approach does not suffer from th ...
We report results on electric DC-field induced and self induced recovery of the switched remanent polarisation (P-r(s)) in fatigued ferroelectric thin films. The field induced recovery is characterised by a strong asymmetry and depends on the ratio between ...
The paper deals with the main problems to solve in order to simulate precisely the behavior of complex power systems with mixed elements (power components and digital regulation devices). The main features of an efficient simulation tool are described. The ...
The present paper describes a stator flux oriented control strategy using state space controllers. The optimal determination of different controllers'parameters (suitable placement of poles, continuous adapation of coefficients to the operating point of th ...
This paper examines the use of thyristor controlled series capacitors (TCSCs) for the redistribution of active power flows (PFs) in a transmission network and presents a simple model of a hierarchical coordinated control system for multiple devices. The TC ...
Multilevel inverters represent a high potential for realization of a high power controllable conversion system of different nature, rectifiers, inveters, high power amplifiers, etc. From the even more applied three-level inverter to the multiple AC stages ...
In this article the development and realization of a 8 kW battery charger with Power Factor Correction (PFC) is described. The converter consists of two parts: The first part is an AC/DC converter based on a “VIENNA” topology with a controlled output volta ...
The initial commissioning of the 127 sectors of the LEP vacuum system requires local control facilities. On the scale of the LEP, local control of one sector implies the supervision of vacuum equipment which may be spread over 480 metres, with pump power s ...
The paper deals with the main problems to solve in order to simulate precisely the behavior of complex power systems with mixed elements (power components and digital regulation devices). A simulation tool developed at the Swiss Federal Institute of Techno ...