Topic
Stand-alone power system
About: Stand-alone power system is a research topic. Over the lifetime, 8650 publications have been published within this topic receiving 192397 citations. The topic is also known as: Stand-alone photovoltaic power system.
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TL;DR: It was decided to investigate the implementation of a hydrogen subsystem into the SAPS that can work in parallel with the Distributed Intelligent Load Controller (DILC) and can then function as energy storage on long-term basis and an active load controller on short- term basis.
52 citations
08 Jun 2009
TL;DR: This paper is aimed at assessing the maximum wind power capacity a distribution network is able to integrate based on a multi-period AC Optimal Power Flow technique tailored to cater for Active Network Management schemes such as coordinated voltage control, adaptive power factor control and energy curtailment.
Abstract: In order for governments worldwide to achieve their renewable targets, large amounts of new capacity, mainly wind power, need to be connected to power systems. A significant share is expected to be deployed at distribution levels. This paper is aimed at assessing the maximum wind power capacity a distribution network is able to integrate based on a multi-period AC Optimal Power Flow technique tailored to cater for Active Network Management schemes such as coordinated voltage control, adaptive power factor control and energy curtailment. The methodology is applied to an Irish 38kV circuit, considering the time-varying characteristics of demand and multiple wind generation profiles based on the coincident hours of different loading levels and wind power outputs over a year.
52 citations
TL;DR: In this article, the status, perspectives and technical challenges for wind power in the power system from the point of view of Energinet.dk are presented from the perspective of the transmission system operator.
Abstract: The power system of Denmark is characterized by significant incorporation of wind power. Presently, more than 20% of the annual electricity consumption is covered by electricity-producing wind turbines. The largest increase in grid-incorporated wind power is expected to come from large (offshore) wind farms operating as large wind power plants with ride-through solutions, connected to the high-voltage transmission system and providing ancillary services to the system. In Denmark there are presently two offshore wind farms connected to the transmission system: Horns Rev A (160MW rated power in the western part of the country) and Nysted (165MW rated power at Rodsand in Eastern Denmark). The construction of two more offshore wind farms, totalling 400MW by the years 2008–2010, has been announced. This article presents the status, perspectives and technical challenges for wind power in the power system from the point of view of Energinet.dk, Transmission System Operator of Denmark. Copyright © 2006 John Wiley &Sons, Ltd
52 citations
15 Jun 2008
TL;DR: In this paper, a three-phase grid-connected photovoltaic generation system with unity power factor for any situation of solar radiation is presented, where the system operates as an active filter capable of compensate harmonic components and reactive power generated by the other loads connected to the system.
Abstract: This paper presents a three-phase grid-connected photovoltaic generation system with unity power factor for any situation of solar radiation. The model of the PWM inverter and a control strategy using dq0 transformation are proposed the system operates as an active filter capable of compensate harmonic components and reactive power, generated by the other loads connected to the system. A input voltage clamping technique is proposed to control the power between the grid and photovoltaic system, where it is intended to achieve the maximum power point operation. Simulation results and analyses are presented to validate the proposed methodology for grid connected photovoltaic generation system.
52 citations
TL;DR: In this article, the behavior of a single-stage photovoltaics system under unbalanced voltage conditions is studied, and a fault ride-through control scheme is proposed which is able to support the grid through the injection of reactive power.
Abstract: Integration of distributed generation (DG) such as photovoltaics (PV) represents a challenge for the traditional operation of distribution power systems. As the installed power of DGs grows, grid codes are being modified to involve DGs in the provision of ancillary services. This includes the ability to ride-through large disturbances. In this paper, the behavior of a single-stage PV system under unbalanced voltage conditions is studied, and a fault ride-through control scheme is proposed which is able to support the grid through the injection of reactive power. Furthermore, adjustable power quality is enabled as a tradeoff between power ripple and current harmonics. The control scheme makes use of a current controller based on the space vector Fourier transform concept. No rotational transformation is required, and zero steady-state error is ensured when tracking distorted current references. The controller was tested in detailed PSCAD/EMTDC computer simulations, and implemented in a real grid-connected PV system to demonstrate its performance under unbalanced voltage conditions.
51 citations