Interconnected Energy Systems Research Articles

Kernenergie – Rohstoff im Energieverbund

AbstractNuclear energy – A primary resource in the interconnected energy system. Against the background of renewed discussion of the use and future role of nuclear energy, the terms of reference for nuclear energy will be redefined. By contrast with fossil fuels, nuclear fuels are energy resources which can be used practically only for the provision of energy, and thus directly affect the conservation of more valuable resources. On the basis of the boundary conditions with respect to worldwide energy supply, the contribution of nuclear energy to electrical energy supplies will be illustrated in terms of national and world figures. Prospects will be considered as to the future possibility of further development of proven systems for nuclear energy utilization, while appraising the development and significance of advanced systems which will also open up new markets in the interconnected energy system for the primary resource nuclear energy.

Decentralized Load-Frequency Control of Interconnected Energy Systems

The paper deals with the design of an optimal decentralized load-frequency controller for interconnected energy systems. It is assumed that the entire system state vector is not measurable and a decentralized observer based on a reduced order Luenberger observer is synthesized to estimate the unmeasurable states. For the system augmented by the observer, a decentralized output feedback control is applied using an algorithm for parameter optimization with constrained controller structure. The results obtained from a digital simulation of a two-area electric energy system are presented and briefly discussed.

META: An Algorithm for the Analysis of Multilevel Energy Transport Systems

A methodology for the study of deficiencies in large interconnected energy systems is presented. The solution to such problems involves the identification of strategies for the transfer of energy from available sources and over identified paths to the deficiency in the network. The two principal results presented are a procedure for the construction of a hierarchy of networks from a given network and an algorithm designated META (multilevel energy transport algorithm). META accepts this representation of the network as input, and by the application of backtrack programming techniques and an adaptation of the basic max flow algorithm from flow network theory develops a collection of alternative strategies for the resolution of the energy deficiency.

Design of decentralised load-frequency regulators

The problem of designing decentralised regulators for the load-frequency control of interconnected energy systems is studied. Starting with stochastic state and output models, a solution of the decentralised-control problem is presented by making use of modelling-error-compensation technique along with bias-estimation procedure. Some numerical results based on computer simulation of a 2-area power system are also presented.