HVDC Power Transmission Systems by K R Padiyar: A Book Review
HVDC power transmission systems are a technology that allows the transfer of large amounts of electricity over long distances with low losses and high controllability. HVDC stands for high-voltage direct current, which means that the current flows in one direction only, unlike the alternating current (AC) used in most power grids. HVDC systems use converters to change AC to DC and vice versa, and can be classified into two types: line commutated converters (LCC) and voltage source converters (VSC).
One of the most comprehensive and up-to-date books on HVDC power transmission systems is written by K R Padiyar, a professor of electrical engineering at the Indian Institute of Science, Bangalore. The book, titled HVDC Power Transmission Systems, covers both the theoretical and practical aspects of HVDC technology, with an emphasis on the emerging VSC-HVDC technology. The book is divided into 12 chapters and four appendices, covering topics such as:
DC power transmission technology
Line commutated and voltage source converters
Analysis of HVDC converters
Converter and HVDC system control
Converter faults and protection
Smoothing reactor and DC line
Reactive power control
Harmonics and filters
Multiterminal and multi-infeed DC systems
Power flow analysis in AC-DC systems
Modeling and simulation of AC-DC systems
Interactions among AC-DC systems
The book also contains several examples and case studies to illustrate the concepts, as well as details of thyristor and IGBT valves, transient simulation of converters and DC lines, synchronous generator modeling, SSR analysis, CIGRE benchmark models and design of DC and AC voltage controls in VSC-HVDC links. The book is suitable for students, researchers and engineers who wish to study and apply HVDC power transmission.
The book is available in PDF format for free download from various websites[^1^] [^2^] [^3^]. The book has received positive reviews from readers who have praised its clarity, depth and coverage of HVDC technology.Some of the advantages of HVDC power transmission systems are:
They can transmit more power over longer distances with lower losses and higher efficiency than AC systems.
They can interconnect asynchronous AC systems with different frequencies and voltages, and improve the stability and reliability of the power grid.
They can control the power flow and voltage in the AC systems, and provide fast and flexible response to disturbances and faults.
They can integrate renewable energy sources such as wind and solar power, which are often located far from the load centers.
They can reduce the environmental impact of power transmission, such as electromagnetic interference, corona noise and land use.
Some of the challenges of HVDC power transmission systems are:
They require high capital investment and maintenance costs for the converters and other components.
They are susceptible to DC faults, which are difficult to detect, locate and isolate.
They generate harmonics and reactive power, which need to be filtered and compensated.
They have complex interactions with the AC systems, which need to be modeled and analyzed.
They have limited operational experience and standards, which need to be developed and updated.
In conclusion, HVDC power transmission systems are a promising technology that can enhance the performance and efficiency of the power grid. However, they also pose some technical and economic challenges that need to be addressed. The book by K R Padiyar provides a comprehensive and up-to-date reference on HVDC technology, covering both the theoretical and practical aspects. The book is recommended for anyone who is interested in learning more about HVDC power transmission systems. 29c81ba772