Innovative 10–110 kV Compact Controlled Overhead Lines

Innovative 10–110 kV Compact Controlled Overhead Lines

Vitali Mihail Postolati (Institute of Power Engineering of Academy of Sciences of Moldova, Moldova) and Elena Vitalii Bicova (Institute of Power Engineering of Academy of Sciences of Moldova, Moldova)
DOI: 10.4018/978-1-5225-3867-7.ch013

Abstract

This chapter describes how the implementation of compact overhead lines equipped with FACTS devices, including phase angle regulator settings (compact controlled OHL), appears to be one of the most effective ways of power grid development. Compact-design OHL equipped with FACTS have many improvements over previous devices. The devices provide a 1.2-1.6-fold increase in OHL capacity without raising their voltage class. A 1.5–2-fold reduction in the area of land allocated for OHL with equal capacity. An electromagnetic field reduction in the external space, decreasing environmental effects and the impact on people. A 15–30% decrease of total costs per power transfer unit. The total energy loss reduces the power system, increasing OHL mechanical strength under severe weather conditions. Results of the comprehensive research and development in relation to 10–110 kV compact controlled power transmission lines together with theoretical bases, substantiation, and methodological approaches to their practical application and design experience are given in the chapter.
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Introduction

The problems of increasing the transmission capacity of electric transmission lines, power systems modes control, providing the static and dynamic stability, reducing power and energy losses, reducing environmental impact are the main technical problems of the development of modern electric power systems

The problems of reducing capital investments for the construction of power lines, networks and substations and other energy facilities, reducing energy losses and operating costs, are the main economic problems.

Performed analysis and investigations shows that there are really significant opportunities for improving the technical and economic performance of AC power lines.

It is proposed to implement this idea by creating Controllable multi-circuit (and in particular - double-circuit) Self-Compensating high-voltage Transmission Lines (CSCTL).

Objective

The present work is aimed to show the investigation results of new type of power transmission - controlled self-compensating high-voltage transmission lines (CSCTL).

CSCTL make it possible to significantly increase the capacity, create fundamentally new opportunities for the power systems control and improve their technical and economic indicators.

The CSCTL topic is especially relevant at the present time in connection with the intensive research and development of the so-called flexible AC power transmission FACTS (Shakaryan, 2012). Formation of the main conceptual ideas for the creation of the CSCTL was preceded by works in the field of disconnected-line studies (Solovieff, 1933; Rakushev, 1957), as well as the results of theoretical and experimental studies of disconnected and semi-closed transmission lines (Postolaty, 1968; Venikov, Chaly, & Postolaty, 1968; Venikov, Astakhov, & Postolaty, 1970; Postolatiy, Venikov, Astakhov, Chaly, & Kalinin, 1977; Postolatiy, Venikov, Astakhov, Chaly, & Kalinin.1976,1978, 1979, 1982), of further works in the field of controlled self- compensating transmission lines (Postolatiy, Venikov, Astakhov, Chaly, &Kalinin, 1976, 1978, 1979, 1982; Astakhov, Venikov, & Postolatiy 1977; Postolatiy, & Bykova, 2007), and Phase-regulating devices (Boshnyaga, Kalinin, & Postolatiy, 1974, 1974, 1976, 1977, 1978; Postolatiy, Kalinin, Zaitsev, & Bykova, 2005).

The results of research and development of modern devices of compensation and regulation (Ryzhov Yu.P.,2007, Alexandrov, 2007) are of great importance for the development of variants of CSCTL and proposals for their practical use.

So, it is possible to provide an effective control of the modes of CSCTL and adjacent nodes of power systems for any given range of magnitude and direction of transmitted power.

This work describes a number of aspects related to the research and development of the CSCTL

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