Power station

About: Power station is a research topic. Over the lifetime, 33087 publications have been published within this topic receiving 375900 citations. The topic is also known as: generating station & power plant.

Exergy analysis and performance evaluation of Kizildere Geothermal Power Plant, Turkey

Abstract: Conventional geothermal power plants (GPP) differ from fossil-fuel power plants (FFPP) in many ways. The most specific ones are that GPPs are not cyclic plants and the working fluid is not pure steam. Geothermal steam contains non-condensable gases (NCG) which degrade power plant efficiency. This discrepancy leads to two considerations in energy and exergy analysis of GPPs. One is that the amount of NCGs in the steam cannot be omitted during the calculations; the other is that the dead state composition varies throughout the process. In this work, energy and exergy analysis is conducted to assess the performance of Kizildere GPP under both considerations. The net second law efficiencies of the plant based on reservoir and wellhead exergy are 24.3 and 27.2% respectively. Both indicate that the plant performance is low comparing with the other single-flash GPPs and FFPPs. The losses are mainly associated with high NCG content and low steam fraction of the fluid.

Towards coding strategies for forecasting-based scheduling in smart grids and the energy lab 2.0

Abstract: Development of the power supply system towards a more decentralized system with a growing share of renewable energies constitutes an additional complexity for its reliable, secure, and economic operation. This has a strong impact on a variety of optimization tasks, such as power plant resource scheduling, reactive power management, or the expansion of the system by additional transmission lines, power generators or storage systems. In particular, scheduling and expansion planning depend strongly on a reliable forecast of expected demands and electricity production, the latter being a demanding task for volatile sources, such as wind power plants or photovoltaic power generators (PV). For testing new approaches and strategies, the Karlsruhe Institute of Technology (KIT) develops a test bed comprising different energy grids called Energy Lab 2.0. This test bed will allow studying the effects of new tools, forecasting and scheduling techniques, and other algorithms aimed at managing a smart grid. The lab and applied forecasting techniques will be briefly introduced in the present contribution. First ideas about metaheuristic scheduling of different energy sources based on production and demand forecasts with the aim of ensuring a reliable and economic energy supply are introduced. Appropriate representations for Evolutionary Algorithms (EAs) are discussed and some experience from earlier scheduling projects for fast scheduling of many jobs to heterogeneous resources are given.

Diagnostics and monitoring of railway automation and remote control power supply devices

Abstract: This article is devoted to the research of diagnostics and monitoring of power supply devices of railway automation and remote control. The analysis of failure statistics of power supply devices in recent years has been carried out and the most vulnerable elements of power supply systems have been identified on its basis. Objects are described, the state of which must be diagnosed in the input devices, in switchgears, as well as the diagnostic parameters of the battery and the backup power station; the principles of determining their technical condition are presented. The authors for the first time proposed technical solutions for increasing the survivability of power supply devices in case of poor-quality external power supply. The article also presents possible solutions for the implementation of diagnostics of monitored facilities, which save time spent by personnel on maintenance to reduce operational costs, improve the reliability of the power supply of automation and remote control, which will improve the safety, uninterrupted operation and efficiency of the transportation process.

Electric power plant and method for distributing its load

Abstract: PROBLEM TO BE SOLVED: To provide an electric power plant and a method for distributing its load in which a running cost is reduced while keeping a regulated value of an exhaust gas. SOLUTION: The electric power plant is composed of boilers B1-Bn, a steam header SH for storing steam from the boilers B1-Bn, steam turbines T1-Tm which are rotated and driven by the steam from the header SH, generators G1-Gm which are connected to the turbines T1-Tm, respectively, a plant control computer for controlling the entire plant and the individual processes, and the like. Efficiency characteristics of the boilers B1-Bn by fuels, their cost characteristics by fuels and their exhaust gas generation characteristics by fuels, as well as power generation characteristics of the turbines T1-Tm and the generators G1-Gm, and treating cost characteristics of exhaust gas treating devices D1-Dn, are set in advance. On the basis of these characteristics, the fuel flow rate and the airflow rate of the boilers B1-Bn and the steam flow rate of the turbines T1-Tm are controlled, so that the generation rate of the exhaust gas falls within a range of a given limitation and the running cost is minimized.