Introduction to High Voltage Engineering and Electrostatic Field(USe this one!)

These flashcards cover key concepts and definitions related to high voltage engineering, electrical safety standards, power systems, and fundamental electrical principles as discussed in the lecture.

What does Power Engineering encompass?

Generation, transmission, distribution, and utilization of electrical energy.

What are some components of power systems?

Synchronous generators, power transformers, overhead transmission lines, underground cables, and switchgear.

What is the definition of High Voltage (HV)?

Electrical energy at voltages high enough to inflict harm on living organisms.

What safety requirements are associated with HV equipment?

Safety procedures and protective measures to prevent electrical hazards.

How is High Voltage categorized in Australia?

Defined by AS/NZS 3000:2018 and AS 2067 standards.

What is the range of High Voltage according to Australian standards?

Greater than 1000 V AC or greater than 1500 V DC.

What are common HV levels for distribution networks in Australia?

11 kV and 22 kV.

Which voltages are used for sub-transmission in Australia?

33 kV and 66 kV.

What maximum capacity does the Yallourn Power Station have?

1,480 MW.

What is the primary fuel for Yallourn Power Station?

Brown coal.

What is High Voltage Direct Current (HVDC)?

A form of electricity transmission that uses direct current for the bulk transmission of electrical power.

What are the main applications of high direct voltages?

Testing fields, research laboratories, and HVDC transmission.

What characteristics define an impulse voltage?

Unidirectional voltage that rises rapidly to a maximum and falls rapidly to zero.

What phenomenon can cause external over-voltages?

Lightning surges.

What are the primary transmission voltages used in Australia?

110 kV, 132 kV, 220 kV, 400 kV, 500 kV, and 765 kV.

What is the crucial rule for determining working voltage for transmission?

T V (kV) must be greater than or equal to length (KM).

What does Coulomb's law describe?

The force between two point charges at a distance apart.

What represents electric field intensity (E)?

The force exerted per unit positive test charge.

What relationship does Gauss's Law express?

Total electric flux through a closed surface equals the charge enclosed.

What is the formula for capacitance of a coaxial cable?

C = 2πε₀εᵣ ln(r₂/r₁) F/m (per phase).

How is insulation thickness calculated for a coaxial cable?

Insulation thickness = r₂ - r₁.

What software is mentioned for electric field simulation?

ANSYS Maxwell.

What is the formula for calculating charge in a capacitor?

Q = CV, where C is capacitance and V is voltage.

What happens to the electric field as the dielectric material changes?

The electric field intensity will be influenced by the relative permittivity of the material.

Which principles are involved in the operation of transformers?

Magnetic field concepts and electromagnetic induction.

What impact does increasing working voltage have on generator design?

It raises the need for more insulation, thereby increasing size and cost.

What factor affects the efficiency and choice of transmission voltage?

The distance over which power is to be delivered.

What is one advantage of HVDC transmission over AC systems?

D.C. cables are less expensive and can cover greater lengths without additional substations.

In electric fields, what does a negative gradient of voltage indicate?

That the electric field is pointing in the direction of decreasing voltage.

How do you calculate the electric flux density (D)?

D = εE, where ε is the permittivity of the material.

What was the maximum electric field intensity recorded in the cable example?

43.2 kV/mm.

What is the capacitance of the cable in the example provided?

159.50 pF.