In hierarchical distributed control systems for hydro power groups located over a large area, there are requirements for independent (autonomous) operation of control systems for each power group (or parts of the group), to solve local problems or in case of real-time faults over communication paths with upper levels. In this case, the control equipment for power groups may be defined as holons...

Abstract: In this paper, a decentralized control problem is considered for multimachine power systems with nonlinear interconnections and disturbances. A direct feedback linearization compensator is employed to cancel most of the nonlinearities, and then a backstepping procedure is applied to deal with the interconnections and to reduce the effects of a disturbance that does not satisfy the mat...

This paper focuses on secondary frequency controlof large-scale power systems. First a centralized and a consen-sus control based distributed control law are presented, thena multi-level control law, named Multi-Level Power-ImbalanceAllocation Control (MLPIAC), for the large-scale power systemspartitioned into more than one region. The centralized anddistributed control ...

Power systems are increasingly built from distributed generation units and smart consumers that are able to react to grid conditions. Managing this large number of decentralized electricity sources and flexible loads represent a very huge optimization problem. Both from the regulatory and the computational perspective, no one central coordinator can optimize this overall system. Decentralized c...

With an aim of ultra-low power operation, membranetype distributed-feedback (DFB) lasers consisting of wirelike active regions are realized with an InP-based high index-contrast waveguide by using benzocyclobutene (BCB) as well as direct boding on a silicon-on-insulator (SOI) substrate. Lateral current injection (LCI) type lasers on a semi-insulating (SI) InP substrate are also presented. Keywo...

This paper addresses the problem of frequency control for non-synchronous AC areas connected by a multi-terminal HVDC grid. It proposes a decentralized control scheme for the DC voltages of the HVDC converters aimed to make the AC areas collectively react to power imbalances. A theoretical study shows that, by using local information only, the control scheme allows to significantly reduce the i...

A distributed feedback channel waveguide laser in erbium-doped aluminum oxide on a silicon substrate is reported. The optically pumped laser has a threshold pump power of 15 mW and emits 3 mW in single-frequency operation at 1545.2 nm wavelength with a slope efficiency of 6.2% and linewidth of 15 kHz. Keywords—Distributed feedback (DFB) laser; waveguide laser; erbium-doped laser; Bragg gratings...

A Radial Distribution network is important in power system area because of its simple design and reduced cost. Impact of Distributed generation in radial distribution feeder is increased because of its application of green technology and it also meet out some of the power system issues. Allocation of Distributed Generation at non-optimal places leads to increased power loss and reduced bus volt...

With the rise of distributed generation, such as wind power and photovoltaic (PV), it is necessary to consider the effect of distributed generation’s output randomness. Using the method of Latin hypercube sampling (LHS) can effectively fit output scenario. Considering the sampling number of conventional LHS (CLHS) must be fixed in advance, LHS(ELHS) can be Extended to predict wind power. The sa...

In this paper, penalized power-divergence test statistics have been defined and their exact size properties to test a nested sequence of log-linear models have been compared with ordinary power-divergence test statistics for various penalization, λ and main effect values. Since the ordinary and penalized powerdivergence test statistics have the same asymptotic distribution, comparisons have bee...