Progress in dynamic simulation of thermal power plants

Improving the load flexibility of coal-fired power plants by the integration of a thermal energy storage

The possibilities of combined heat and power production balancing large amounts of wind power in Finland

Increasing operational flexibility of supercritical coal-fired power plants by regulating thermal system configuration during transient processes

Recent developments and trends in optimization of energy systems

Modelling and simulation of a coal-fired power plant for start-up optimisation

O ering services to stabilize the electrical grid is nowadays one of the major tasks of fossil power plants and also of signi cant economical relevance. However the e ects on the power plants regarding the additional wear of components is uncertain. Usually the e ects regarding control reserves, especially primary control occur with high frequencies and small amplitudes, which makes investigations based on measurement data impossible since the e ects are masked by the noise of normal operation. In order to investigate this issue, a detailed model of a lignite power plant has been used, which was developed in Modelica for simulating and comparing scenarios with and without o ering primary control reserves. The model comprises the entire water-steam cycle including turbines, preheaters and pumps, as well as a very detailed boiler model including the air supply, coal mills, a combustion chamber, heating surfaces and piping. Furthermore the power plants control system has been implemented in a very precise way. In addition the study involves an investigation on the input signals (grid frequency) and a calculation of lifetime consumption for speci c components to evaluate the e ects.

/pdf/modelling-a-lignite-power-plant-in-modelica-to-evaluate-the-y97gx0eky1.pdf

Modelling a Lignite Power Plant in Modelica to Evaluate the Effects of Dynamic Operation and Offering Grid Services

In order to meet future demands, existing and new plants need to be optimized to offer additional control reserves to stabilize an electrical grid, which is highly penetrated by fluctuating renewables. Since this requires a dynamic investigation, transient physical based models of different power plants have been developed to evaluate effects of increased flexibility as well as to develop optimization strategies. The approach has been tested for a specific 500 MW lignite-fired power plant. It includes detailed modeling of the incorporated sub-systems and their interactions as well as the implementation of the power plant’s control system. The dynamic simulation model is used for the identification of energy storage potentials within the process and for testing and developing control strategies in order to increase flexibility and marketable output of the process. The strategies are benchmarked and evaluated based on the consideration of exergetic efficiency and lifetime-consumption of critical components.Copyright © 2015 by ASME

Identification of Energy Storage Capacities Within Large-Scale Power Plants and Development of Control Strategies to Increase Marketable Grid Services

https://onlinelibrary.wiley.com/doi/pdf/10.1002/ese3.890

Evaluation of the effects of a load shedding at a lignite power plant

The first part of this chapter gives a short overview about the general problems of integration Therefore a control theory based description of the basic fundamentals of the power system control concepts is given The second part of the chapter concentrates on the technical framework conditions of conventional power plants to follow the intermittent power feed-in because as long as no large-scale storage systems are available these conventional power plants will be necessary to integrate the renewable energy at least for the next 20 years Therefore different methods and tools to analyze and simulate the power plant scheduling and to determine the additional life time consumption of highly stressed components of fossil fueled power plants will be presented and illustrated by different scenarios

/pdf/technical-framework-conditions-to-integrate-high-1sgop1tvma.pdf

Sebastian Meinke

Papers

Modelling and simulation of a coal-fired power plant for start-up optimisation

Modelling a Lignite Power Plant in Modelica to Evaluate the Effects of Dynamic Operation and Offering Grid Services

Identification of Energy Storage Capacities Within Large-Scale Power Plants and Development of Control Strategies to Increase Marketable Grid Services

Evaluation of the effects of a load shedding at a lignite power plant

Technical Framework Conditions to Integrate High Intermittent Renewable Energy Feed-in in Germany