Deepakkumar Yadav
Numerical Methods of Calculation of Electric field There are numerous to solve partial differential equation having Laplace and Poisson equation but there are many difficulties in solving these equations for 2D and 3D fields with complex boundary conditions or for insulating material with different permittivities and conductivities. There are 3 types of numerical methods commonly … Read more
Power Frequency Over Voltages in Power Systems Following are some of the reasons for power frequency over voltages : Disconnection of inductive loads or connection of capacitive loads Ferranti effect Sudden loss of loads Saturation in transformers Unsymmetrical faults etc.
Estimation of Electric Field in Some Geometric Boundaries In a uniform field gap, the average field E is the same throughout the field region whereas in non-uniform field gap, E is different at different points of field region. Uniform field distribution is present between 2 spheres of equal diameter when the gap distance is less … Read more
Charge Simulation Method of calculation of Electric Field Q. Describe in brief the charge simulation method for estimation of Electric Field Intensity. It describes the surface charge present at the boundary of an electrode by fictitious , discrete charges in the interior of the electrode. Point, line or ring type charges are possible depending upon … Read more
Electric Field Stress Estimation and Control ∇2 Φ = p/∈0 … (Eqn 1) Where, Φ = Potential at a given point p = Space charge density in the region and ∈0 = Electric permittivity of free space (vacuum) Equation 1 was given by Poisson and is therefore known as Poisson’s equation for electric field distribution. If in Equation ∇2 Φ = … Read more
Static VAR Compensation System The general arrangement of static VAR compensator is shown in Figure. VAR (Volt Ampere Reactive) is the unit for measuring the reactive power. VAR compensator is used to reduce the reactive power drawn from a transmission line. It shows that the static VAR compensator consists of TCRs (Thyristor Controlled Reactor) in … Read more
Advantages, Disadvantages and Applications of Solid State Regulator Advantages of Solid State Regulator : Due to the incorporation of firing angle control, the output voltage regulation is better than that of the tap changing regulator. Its dynamic response is faster than that of the tap changing regulator. Disadvantages of Solid State Regulator : Poor input power factor due to … Read more
Static Electrification in Power Transformer Transformer represent a significant asset in any power system network. The power transformer are crucial elements of the network. There are two critical phenomenon which affect reliability of power transformers -Static electrification and geometrically induced currents. There are number of transformer failures associated with these phenomenon. The force cooled power … Read more
Methods of Calculation of Electric Field There are different graphical, experimental and numerical field calculation methods. Special methods like method of images, conformal mapping, co-ordinate transformation are applied to simple geometrical configuration. The experimental measurement of field strength in small air gaps stressed by high voltages is a very difficult process and not quite accurate. … Read more
Fields in Multidielectric, Isotropic Materials Many insulating materials used in high voltage insulation system are formed with different layers of various insulating materials. Different materials have different permittivities. e.g. Bakelite sheets or mica sheets or materials used in transformers. The necessity of using such a material is Different layers are used to control electric stresses. … Read more