To improve the primary frequency response in future low-inertia hybrid power system a fuzzylogic based frequency controller (FFC) for wind farms augmented with energy storage systems(wind-storage system) and intelligent PV farms for the frequency stabilization is proposed inthis paper. Using system frequency deviations the proposed controller provides bidirectionalreal p...

Abstract The need for storage in electricity systems is increasing because large amounts of variable solar and wind generation capacity are being deployed. About two thirds net global annual power additions wind. Pumped hydro energy (PHES) comprises about 96% 99% volume. Batteries occupy most the balance market including utility, home electric vehicle batteries. rapidly falling price can compet...

This paper describes a first version of a simulation model of the electrical energy system for the German federal state Bavaria in order to analyse its energy balance during the nuclear phaseout and the increase of renewable energy sources as well as energy storage capacities. According to current plans, in ten years 50 percent of the Bavarian electric power consumption should be covered by ren...

We report direct and absolute temperature measurements in a diode-end-pumped Yb:YAG crystal, using a calibrated infrared camera, with a 60-μm spatial resolution. The heat transfer coefficient has been measured, for the first time to our knowledge, with four different types of thermal contact (H = 0.25, 0.28, 0.9 and 2.0 for bare contact, graphite layer, indium foil and heat sink grease respecti...

The rapid rise of renewable energy production necessitates the development largescale electricity storage systems. Pumped thermal (PTES), where is stored in hot and cold units, has recently garnered a lot interest. Previously proposed PTES systems rely on pure fluids as working Brayton- or Rankine-based power cycles. Herein, ZeoPTES, system using zeotropic mixture ammonia water fluid, introduce...

The development of the wind energy industry is seriously restricted by grid connection issues and wind energy generation rejections introduced by the intermittent nature of wind energy sources. As a solution of these problems, a wind power system integrating with a thermal energy storage (TES) system for district heating (DH) is designed to make best use of the wind power in the present work. T...

In this paper, a neural Pseudoderivative control (PDF) is applied to a nonlinear mathematical model of the Dinorwig pumped storage hydroelectric power station. The response of the system with this auto-tuning controller is compared with that of a classic controller, currently implemented on the system. The results show how the application of PDF control to a hydroelectric pumped-storage station...

This paper deals with the pumping storage system analysis. The water reservoir serves for daily and seasonal energy storage, thus basically solving the problem of energy storage, which is the biggest problem of wider use of renewable energy sources. The electrical energy produced in excess by the renewable energy system is converted in potential energy by pumping water to a higher elevation whe...