High Voltage Engineering

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9781466513761: High Voltage Engineering

"High Voltage Engineering condenses many insights from the authors’ combined 100 years’ experience into only 773 pages. Calculation of electric fields describes some specific examples, such as Rogowski and Bruce profile electrodes, that can be used to ensure that practitioners understand their sophisticated software in a cylindrically symmetric problem before using it in 3-D. There is extensive treatment of statistics for high voltage testing as well. Inside this chapter, I found a nice discussion on the minimum number of tests (9) and also some new insight into the relationship between 1-minute and 30-minute withstand test results. The extensive work on electrical breakdown of gases is the best place to find the currents associated with various positive and negative corona modes. The treatment of long air gap breakdown is succinct and relies on the close agreement between Dr. Rizk’s continuous leader inception model and test data in the range of 2 to 20m. A comparison of the models for correcting for absolute humidity in the range of 5 to 15 g/m3 highlights another advantage of Rizk’s physical approach. This model is also highlighted in the treatment of lightning attachment, considering the 100m ‘final jump’ from leader to grounded structure as a class of flashover problem. In chapter 10, I found a new data point for the ratio of non-soluble deposit density (NSDD) to equivalent salt deposit density (ESDD) of about 5:1, 18% ESDD by weight. I also found a satisfactory explanation for a point that has always bothered me. Dimensional analysis suggests a linear relation of ESDD to wind speed and exposure time, but a velocity-cubed relationship was found near the sea. The answer is that the density of salt particles is proportional to the square of wind speed. The important role of ac re-ignition in the contamination flashover process is clearly identified. Dielectric recovery across dry bands was one of Rizk’s contributions from 43 years ago, but this aspect is still missed when researchers use dc models to fit ac test results. I also enjoyed a practical focus in the section on high voltage testing and measuring techniques related to the currents and voltages induced in signal cables as well as the effect of large HV divider surge impedance. Congratulations to Drs. Rizk and Trinh on their impressive book."
—Dr. William A. Chisholm, from INMR Magazine

Reseña del editor:

Inspired by a new revival of worldwide interest in extra-high-voltage (EHV) and ultra-high-voltage (UHV) transmission, High Voltage Engineering merges the latest research with the extensive experience of the best in the field to deliver a comprehensive treatment of electrical insulation systems for the next generation of utility engineers and electric power professionals. The book offers extensive coverage of the physical basis of high-voltage engineering, from insulation stress and strength to lightning attachment and protection and beyond.

Presenting information critical to the design, selection, testing, maintenance, and operation of a myriad of high-voltage power equipment, this must-have text:

  • Discusses power system overvoltages, electric field calculation, and statistical analysis of ionization and breakdown phenomena essential for proper planning and interpretation of high-voltage tests
  • Considers the breakdown of gases (SF6), liquids (insulating oil), solids, and composite materials, as well as the breakdown characteristics of long air gaps
  • Describes insulation systems currently used in high-voltage engineering, including air insulation and insulators in overhead power transmission lines, gas-insulated substation (GIS) and cables, oil-paper insulation in power transformers, paper-oil insulation in high-voltage cables, and polymer insulation in cables
  • Examines contemporary practices in insulation coordination in association with the International Electrotechnical Commission (IEC) definition and the latest standards
  • Explores high-voltage testing and measuring techniques, from generation of test voltages to digital measuring methods

With an emphasis on handling practical situations encountered in the operation of high-voltage power equipment, High Voltage Engineering provides readers with a detailed, real-world understanding of electrical insulation systems, including the various factors affecting—and the actual means of evaluating—insulation performance and their application in the establishment of technical specifications.

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