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.

Effect of residential solar and storage on centralized electricity supply systems

Abstract: The recent boom in residential solar power is disrupting centralized electricity systems and helping to reduce greenhouse-gas emissions. Residential solar photovoltaic systems combined with affordable battery storage are becoming increasingly likely to drive a consumer-led, low-emission evolution of modern electricity supply systems. In the past decade, a multi-billion-dollar boom in solar photovoltaic development across the globe has disrupted the way in which centralized electricity systems operate. At the same time, solar photovoltaic power has begun to make a material contribution to reduction targets for greenhouse gas emissions. Viable electricity storage solutions are now on the cusp of a rapidly declining price trajectory. When coupled with solar photovoltaic systems, battery storage could become one of the most disruptive influences to impact the electricity sector in decades, yet governments and the broader power sector are poorly prepared. In this Perspective, we examine emerging trends and proffer a systems framework to analyse the disruptive influence of residential solar photovoltaic and storage systems on existing centralized electricity supply systems.

A Circuit-based Photovoltaic Array Model for Power System Studies

Abstract: Recent interest in distributed generation (DG) due to the opening of the electricity market and the need for alternatives to conventional fossil fuel-based electricity generation has revived interest in grid-connected photovoltaic (PV) systems. Studies need to be performed at the power system level to examine the impacts of grid-connected PV systems and several models for PV arrays have been proposed in the literature for this purpose. However, the complexities of these models and the difficulties of implementing them in software programs can be deterrents to their use. This paper proposes a simple, robust and flexible piecewise linear PV device model for dynamic and transient power system studies. The circuit-based nature of the model is beneficial because it facilitates understanding of the PV device and its behavior in the connected circuit. Software implementation is straightforward and it can even be constructed using standard software library components, as demonstrated using PSCAD/EMTDC.

An LVDC distribution system concept

Abstract: An LVDC distribution system is a new innovation in a field of electricity distribution. This paper presents the basic principles to use power electronics devices in electricity distribution systems. Recent technological and economical developments in power electronic components enable to apply power electronics in LV network. This development makes an LVDC distribution system concept establishment possible. In this respect the occurring progression connects power electronics and distribution system development strongly together. The LVDC distribution system basic concept concentrates at DC/AC interface focusing on implementation of customer-end inverter. The previously made analyses have shown that presented LVDC distribution system has existing techno-economical potential in electricity distribution networks. HE demand for undisturbed electricity is growing while society relies more and more on electricity. The occurring outages have more effects to the customers and outage costs increases. At the same time the climate is changing and causing bigger storms than before. The network disturbances caused by storms have become larger and the number is increased. These challenges have raised demand for more reliable network solutions compared to traditional 20/0.4 kV 3-phase AC distribution systems. The LVDC distribution system concept responds to these challenges in field of electricity distribution. In the early days the first electricity distribution systems were based on DC technology but were rapidly replaced with AC systems due to its benefits compared to DC. Today's utilization of DC technology concentrates mainly to HVDC transmission systems, industrial distribution and electric drives. The technical and economical developments during last decades have established opportunity to create a new competitive distribution system based on modern power electronic technology. From technological point of view the DC distribution system is a new concept in electrical distribution and it generates a new area of business to power electronic device manufacturers.