Here you can download the free lecture Notes of Extra High Voltage AC Transmission Pdf Notes – EHV AC Pdf Notes materials with multiple file links to download. The Extra High Voltage AC Transmission Notes Pdf – EHV AC Notes Pdf book starts with the topics covering Preliminaries: Necessity of EHV AC transmission, Line inductance and capacitances, Voltage gradients of conductors:Electrostatics, Power loss and audible noise (AN), Radio interference (RI), Electrostatic field: calculation of electrostatic field of EHV/AC lines, Traveling wave expression and solution, Power circle diagram and its use, Etc.

## Extra High Voltage AC Transmission Pdf Notes – EHV AC Pdf Notes

**Complete Notes**

**Link:Complete Notes**

**Note :-** These notes are according to the R09 Syllabus book of JNTU.In R13 and R15,8-units of R09 syllabus are combined into 5-units in R13 and R15 syllabus. If you have any doubts please refer to the JNTU Syllabus Book.

**Unit – I**

Preliminaries: Necessity of EHV AC transmission – advantages and problems–power handling capacity and line losses- mechanical considerations – resistance of conductors – properties of bundled conductors – bundle spacing and bundle radius- Examples.

**Unit – II**

Line and ground reactive parameters:Line inductance and capacitances – sequence inductances and capacitances – modes of propagation – ground return – Examples

**Unit – III**

Voltage gradients of conductors:Electrostatics – field of sphere gap – field of line changes and properties – charge – potential relations for multi-conductors – surface voltage gradient on conductors – distribution of voltage gradient on sub-conductors of bundle – Examples.

### Extra High Voltage AC Transmission Notes Pdf – EHV AC Notes Pdf

**Unit – IV**

Corona effects – I:Power loss and audible noise (AN) – corona loss formulae – charge voltage diagram – generation, characteristics – limits and measurements of AN – relation between 1-phase and 3-phase AN levels – Examples.

**Unit – V**

Corona effects – II:Radio interference (RI) – corona pulses generation, properties, limits – frequency spectrum – modes of propagation – excitation function – measurement of RI, RIV and excitation functions – Examples.

**Unit – VI**

Electro static field:Electrostatic field: calculation of electrostatic field of EHV/AC lines – effect on humans, animals and plants – electrostatic induction in unenergised circuit of double-circuit line – electromagnetic interference-Examples.

**Unit- VII**

Traveling wave theory:Traveling wave expression and solution- source of excitation. Terminal conditions- open circuited and short-circuited end- reflection and refraction coefficients-Lumped parameters of distributed lines-generalized constants-No load voltage conditions and charging current.

**Unit –VIII**

Voltage control:Power circle diagram and its use – voltage control using synchronous condensers. Cascade connection of shunt and series compensation – sub synchronous resonance in series capacitor – compensated lines – static VAR compensating system.

**Text books –** Extra High Voltage AC Transmission Notes – EHV AC pdf notes – EHV AC Pdf – EHV AC lecture notes

1. EHVAC Transmission Engineering by R. D. Begamudre, New Age International (p) Ltd.

2. HVAC and DC Transmission by S. Rao

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