Phase locked loop and synchronization techniques are one of the most important issues for operating grid-interfaced converters in practical applications, which involve Distributed Power Generation Systems, Flexible AC Transmission Systems (FACTS), and High Voltage Direct Current (HVDC) Transmission, and so on. This paper presents a comprehensive review of the recently developed phase locked loo...

Deregulation and privatization are posing new challenges to high voltage transmission and distributions systems. System components are loaded up to their thermal limits, and power trading with fast varying load patterns is leading to an increasing congestion. In addition to this, the dramatic global climate developments call for changes in the way electricity is supplied [1, 2]. Innovative solu...

Most of the HVDC power converters with thyristor valves are assembled in a converter Bridge of Six pulse configuration. Converter transformers with one DC side winding as an ungrounded star connection and the other a delta configuration. Comparative studies of the two systems of HVDC CIGRE model without STATCOM and with STATCOM were performed. In these case, the consideration was the converter ...

Conventional Voltage Source Converters (VSC) cannot interrupt DC fault currents and DC circuit breakers are not yet commercially available for HVDC power ratings. Thus, the protection of VSC-HVDC systems is still an obstacle for the development of this technology. The features of VSC-HVDC systems make them suitable for implementing HVDC grids. Nevertheless, HVDC grids are more complex than poin...

Computational Intelligence (CI) techniques are useful tools for modeling, dynamic reconfiguration, control and optimization. The nonlinear stochastic power network requires different mathematical models as system parameters and network topologies change. Intelligent system identification and control improves the dynamic and transient behavior of power networks, damps inter-area oscillations, an...

High-power thyristors with direct light -triggering and integrated protection functions can be utilized advantageously for applications in which several thyristors are connected in series. This applies in particular to High-Voltage DC (HVDC) transmission, Static Var Compensation (SVC), converters for medium voltage drives, and also to certain pulse power applications. Recent progress in both de...

Conventionally Grid Connected Solar PV plants initially generates DC power and then converted to AC via inverters and connected into AC grid for power transmission. Depending on the size of the plant, required environmental condition and land availability large PV plants are generally located far away from the load centre. Hence reduction of transmission loss and incised transmission capacity e...

This article provides an overview of high voltage direct current (HVDC) and alternating (HVAC) power transmission alternatives. The use HVDC systems currently represents efficient alternative under certain conditions, mainly due to reduced converter costs, improved system flexibility higher economic efficiency for long distances and, in particular, when it is relevant over submarine or subway c...