Journal ArticleDOI
Coordination between the reactive power scheduling function and the hierarchical voltage control of the EHV ENEL system
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In this article, the control strategies adopted at ENEL (the Italian Electric Power Company) for the automatic voltage regulation and for the short and very short term reactive power scheduling are presented.Abstract:
The paper presents the control strategies adopted at ENEL (the Italian Electric Power Company) for the automatic voltage regulation and for the short and very short term reactive power scheduling. The advanced project is based upon a three level hierarchical control of voltage and reactive power (primary, secondary and tertiary regulation) and a reactive power dispatch procedure. The three levels are characterized by specific control actions which affect systems of different size and complexity, operating in three steps. In particular, the slowest third level executes the optimal voltage profile defined by the short or very short term reactive power scheduling. The need of an effective co-ordination between the off-line reactive scheduling procedures and the on-line voltage control is pointed out in the work. Besides, the paper presents a computation procedure realized in order to simulate the steady state behaviour of the electric power system submitted to the hierarchical voltage control system and its interaction with the VAr optimisation program. >read more
Citations
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A Survey of Frequency and Voltage Control Ancillary Services—Part I: Technical Features
TL;DR: In this paper, a survey of frequency and voltage control ancillary services in power systems from various parts of the world is presented, where the economic features that must be taken into account when designing markets for ancillaries are discussed.
Journal ArticleDOI
A Survey of Frequency and Voltage Control Ancillary Services—Part I: Technical Features
Journal ArticleDOI
Designing the Next Generation of Real-Time Control, Communication, and Computations for Large Power Systems
TL;DR: The thesis of this paper is that the changing environment requires a new look at the operation of the power grid and a complete redesign of the control, communication and computation infrastructure.
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A Two-Stage Robust Reactive Power Optimization Considering Uncertain Wind Power Integration in Active Distribution Networks
TL;DR: Wang et al. as discussed by the authors proposed a two-stage robust optimization model to coordinate the discrete and continuous reactive power compensators and find a robust optimal solution that can hedge against any possible realization within the uncertain wind power output.
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Closure of "The coordinated automatic voltage control of the Italian transmission grid - part I: reasons of the choice and overview of the consolidated hierarchical system"
TL;DR: In this article, a survey of the application of Secondary and Tertiary Voltage Regulations (SVR and TVR) already operating in the Italian transmission network is presented, in terms of system characteristics, main functions and design requirements.
References
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Optimal power flows
TL;DR: The state of the art of optimal flows at the end of 1978 is reviewed, methods for the solution of the static optimization are presented and filed, and dynamic aspects with applications to online dispatch are investigated.
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Survey of the Secondary Voltage Control in France : Present Realization and Investigations
TL;DR: In this article, the authors present a review of the present regional secondary voltage control, and the prospects for the evolution towards a co-ordinated system, based on a sensitivity matrix model, closed-loop pole assignment and adaptive techniques.
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Voltage stability conditions considering load characteristics
TL;DR: In this article, it is shown that when the characteristic of the composite load of a typical utility system is taken into account, large disturbance voltage stability is assured by the existence of the stable equilibrium state of the post-disturbance system.
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Application of Newton's optimal power flow in voltage/reactive power control
TL;DR: In this paper, the authors considered an application of Newton's optimal power flow to the solution of the secondary voltage/reactive power control in transmission networks and developed an efficient computer program based on the latest achievements in sparse matrix/vector techniques.
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Assessment of Real-Time Optimal Voltage Control
TL;DR: In this article, a detailed study of on-line voltage/var control performed on the Ontario Hydro system is presented. And the results of the study are shown that most of the savings could be achieved with voltage control cycle times of about one hour.