EHV AC undergrounding electrical power : performance and planning / Roberto Benato, Antonio Paolucci.

Includes bibliographical references and index.

1. HV Cable World Statistics and some Large Installations -- 1.1. Introduction -- 1.2. Statistics of Cable Installed Lengths -- 1.3. Large Installations of EHV Cable Systems -- 1.4. Land and Submarine 150kV AC Cable Link Sardinia-Corsica: SAR. CO -- 1.5. Madrid "Barajas" Airport Project (Spain) -- 1.5.1. Milestones of the Barajas Project -- 1.5.2. Technical Characteristics of the Link -- 1.5.3. Tunnel and Earthing System Characteristics -- 1.5.4. Power EHV Cables -- 1.5.5. Cable Laying in the Tunnel -- 1.5.6. Transition Compounds and Protection Schemes -- 1.6. 380kV Double-Circuit Cable of Mixed Line Turbigo-Rho (Italy) -- 1.6.1. Milestones of the Turbigo-Rho Project -- 1.6.2. Undergrounding Link of the Turbigo-Rho Mixed Line -- 1.6.3. Power EHV Cables -- 1.7. Cable Laying -- 1.7.1. Transition Compounds and Protection Schemes -- References -- 2. Positive Sequence Model of Symmetrical Lines -- 2.1. Introduction -- 2.2. Transmission Matrix of a Uniform Line -- 2.3. Computation of Single-Core Cable Kilometric Parameters -- 2.3.1. Computation of r (Cable) -- 2.3.2. Computation of l (Cable) -- 2.3.3. Computation of c (Cable) -- 2.3.4. Computation of g (Cable) -- 2.4. Computation of GIL Kilometric Parameters -- 2.4.1. Computation of GIL Apparent Kilometric Resistance r -- 2.4.2. Computation of GIL Kilometric Inductance l -- 2.4.3. Computation of GIL Kilometric Capacitance c -- 2.4.4. Computation of GIL Kilometric Shunt Conductance g -- 2.5. Some Other Matrix Relations Deriving from the Fundamental One -- 2.6. Cascade Connections of Two Port Networks (TPN) -- 2.7. Parallel Connection of Equal Two Port Circuits Thermally and Electrically Decoupled -- 2.8. Shunt Reactive Compensation -- 2.8.1. Uniformly Distributed Compensation -- 2.8.2. Lumped Compensation -- References -- 3. Operating Capability of Long AC EHV Power Cables -- 3.1. Introduction -- 3.2. Basic Constraints -- 3.3. First Analysis: Uos (& delta;), Ir Constrained -- 3.4. Second Analysis: Uos (v), Is Constrained -- 3.5. Voltages and Currents Along the Cable -- 3.6. Power Values Compatible with Basic Constraints and with Voltage Levels at the Receiving-End -- 3.7. No-Load Energization and De-Energization -- 3.8. Power Capability Charts -- 3.8.1. Theoretical Limits of the Length d -- 3.9. Steady State Regimes Within Power Areas -- 3.9.1. Enhanced Capability Charts -- 3.9.2. Application of Ossanna's Method -- 3.10. Cables with Gas Insulation (GILs) -- 3.11. Regimes with Uos & ne; 230 kV -- 3.12. "Receiving Area" and "Sending Area" as Set Intersection -- 3.12.1. Determination of the Receiving Area as Set Intersection -- 3.12.2. Determination of the Sending Area as Set Intersection -- 3.13. Analysis Along the Cable with Lumped Shunt Compensation -- 3.14. Conclusions -- References -- 4. Operating Capability of AC EHV Mixed Lines with Overhead and Cables Links -- 4.1. Introduction -- 4.2. Mixed Lines: OHL-UGC-OHL -- 4.3. Transmission Matrices for the System Study -- 4.4. First Analysis -- 4.5. Second Analysis -- 4.6. Capability Charts -- 4.6.1. Phase Voltage Levels at R -- 4.7. No-Load Energization and De-Energization -- 4.8. Use of Capability Charts as a Guide -- 4.9. "Receiving Area" and "Sending Area" as Intersections of Sets -- 4.10. Analysis Completion -- 4.10.1. Analysis Completion by Means of Ossanna's Method and Matrix Algorithms -- 4.11. Circuital Considerations -- 4.11.1. Three Matrices NH1, NS1, NR1 -- 4.11.2. Elements of NH1 -- 4.11.3. Matrix NS1 -- 4.11.4. Matrix NR1 -- 4.11.5. Matrices NK2, NS2, NR2 -- 4.12. Conclusions -- References -- 5. Multiconductor Analysis of UGC -- 5.1. Introduction -- 5.2. Multiconductor Cell of Three Single-Core Cables Lines -- 5.2.1. Admittance Matrix Y & Delta; to Model the Elementary Cell -- 5.2.2. Computation of ZL by Means of Simplified Carson-Clem Formulae -- 5.2.3. Computation of ZL by Means of Complete Carson Formulae -- 5.2.4. Computation of ZL After Wedepohl -- 5.2.5. Computation of YT & Delta; -- 5.3. Transposition Joints Modelling: YJ -- 5.4. Earthing of Sheaths and Insertion of Possible Shunt Reactors: YE; YE & xi; -- 5.5. Multiconductor Supply Model at the Sending-End -- 5.6. Equivalent Receiving-End Matrix for Load Modelling -- 5.7. Cascade Composition of Blocks Modelled by "Admittance Partitioned Matrices": A First, Simple Circuit -- 5.7.1. Introduction of Other Blocks in the First Simple Circuit and the Steady State Analysis -- 5.7.2. No-Load Subtransient Energization Analysis -- 5.8. Admittance Matrix Equivalent to k Blocks in Cascade Connections -- 5.9. Application of Multiconductor Analysis to the System "Cable #b, 60 km" Already Studied in Chapter 3 with Simplified Criteria (see Figures 3.21 and 3.36) -- 5.9.1. Comparisons with Other Methods -- 5.10. Conclusions -- References -- 6. Comparative Procedure for AC OHL and UGC Overall Cost -- 6.1. Introduction -- 6.2. OHL and UGC in the Comparative Procedure -- 6.3. Capital Costs of OHL and UGC -- 6.4. Energy Losses and Their Actual Cost -- 6.5. Burden on Territory -- 6.6. Visual Impact -- 6.7. Operation and Maintenance (O and M) Costs -- 6.8. Dismantling or Decommissioning Cost -- 6.9. Cost of UGC Shunt Reactive Compensation -- 6.10. Two Case Studies: #al vs. 2#c1 with d = 10km -- 6.10.1. First Case Study with Duration Curve of Figure 6.14a -- 6.10.2. Second Case Study with Duration Curve of Figure 6.14b -- 6.10.3. Sensitivity to the Principal Parameters -- 6.11. Case Study of Section 6.9 with Duration Curve of Figure 6.14a -- 6.12. Conclusion -- References.

"The selection and performance of insulated cables in electrical grids is a vital part of electric power transmission, but is often neglected in favour of a focus on technological construction. EHV AC Undergrounding Electrical Power discusses new methods of analysis for cable performance and for the network behaviour of cable, mixed and overhead lines. It uses capability charts throughout, to offer the reader a clear visual representation of transmission line performances." "The authors discuss the technically computed undergrounding of electrical power and develop original procedures based on the classical equations of transmission lines. They also provide technical and economical comparisons of a variety of cables and analysis methods, in order to examine the performance of AC power transmission systems." "EHV AC Undergrounding Electrical Power is an original guide on cable insertion planning and the operation of power networks. It will enable readers to make detailed performance comparisons between power transmission systems, which will be valuable for postgraduates, as well as engineers involved in power cable manufacturing or electrical transmission systems."--Jacket.