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.

Grid-interactive photovoltaic generation system with power quality control and energy saving

Abstract: Disclosed here is a grid-interactive photovoltaic generation system having power quality improvement and power saving functions. The grid-interactive photovoltaic generation system includes a solar cell array, a first inverter, and a second inverter. The solar cell array receives solar light and generates predetermined power. The first inverter converts the power, generated by the solar cell array, into power required by a grid line. The second inverter is connected to the first inverter, and steps down power, which will be supplied to a load, to an appropriate voltage.

Modelling and Analysing Impacts of Wind Power on Transient Stability of Power Systems

Abstract: This paper considers the impact of increasingly large numbers of wind turbine generators on the stability of power grid networks. Most modern wind turbines do not have conventional grid coupled synchronous generators, as is the case with most other technologies for electrical power generation. Instead, squirrel cage induction generators are used, or generators that are grid coupled with power electronic converters. Consequently, wind turbines interact with the power system in a way that differs from conventional generators. In the paper, the interaction between wind turbines and the power system is investigated using simulations of a widely used representative dynamics test system in which a high wind power penetration is assumed. It is concluded that the impact of wind power on power system transient stability varies much when either constant or variable speed wind turbines are used.

The plug-in electric vehicles for power system applications: The vehicle to grid (V2G) concept

Abstract: The emergence and implementation of advanced smart grid technologies will enable enhanced utilization of electric vehicles (EVs) as mobile energy storage devices which can provide system-wide services With significant penetration of EVs in the near future, the concept, introduced in literature as vehicle to grid (V2G), will be practically possible The V2G concept eases the integration of renewable energy into power system and gives new force to inevitable move toward power generation by clean energy resources Therefore utilizing energy storage in EVs is undeniable due to economic and environment benefits The V2G concept has been the field of many researches in different aspects so far This paper presents a study conducted to reveal the different aspects of V2G in power systems In this study, we analyzed V2G from the perspectives of power system services and electricity market applications Specifically, we have focused on smart parking lots importance in V2G concept, their opportunities and challenges, as well as the application of V2G to provide ancillary services The paper also discusses points which will make the V2G concept feasible as fast and simple as possible

One Step Ahead: Short-Term Wind Power Forecasting and Intelligent Predictive Control Based on Data Analytics

Abstract: The intelligent integration of wind power into the existing electricity supply system will be an important factor in the future energy supply in many countries. Wind power generation has characteristics that differ from those of conventional power generation. It is weather dependent in that it relies on wind availability. With the increasing amount of intermittent wind power generation, power systems encounter more and more short-term, unpredicted power variations. In the power system, supply and demand must be equal at all times. Thus, as levels of wind penetration into the electricity system increase, new methods of balancing supply and demand are necessary.

Is There Still Merit in the Merit Order Stack? The Impact of Dynamic Constraints on Optimal Plant Mix

Abstract: The merit order stack is used to tackle a wide variety of problems involving electricity dispatch. The simplification it relies on is to neglect dynamic issues such as the cost of starting stations. This leads the merit order stack to give a poor representation of the hourly pattern of prices and under-estimate the optimal level of investment in both peaking and inflexible baseload generators, and thus their run-times by up to 30%. We describe a simple method for incorporating start-up costs using a single equation derived from the load curve and station costs. The technique is demonstrated on the British electricity system in 2010 to test its performance against actual outturn, and in a 2020 scenario with increased wind capacity where it is compared to a dynamic unit-commitment scheduler. Our modification yields a better representation of electricity prices and reduces the errors in capacity investment by a factor of two.