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SUB STATION An intermediate electricity-distributing location from which electrical energy is transformed and transmitted to users within a given geographical area. GRID STATION It is a station where multiple inputs/outputs comes and goes , where the voltage is transformed as it is required.
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What is a vacuum tube that contains a grid called?
one grid - triodetwo grids - tetrodethree grids - pentodefour grids - hexodefive grids - heptode, pentagrid convertersix grids - octodeseven grids - nonodeetc.
How does a vacuum tube work?
contains only a heated electron-emitting cathode and an anode. Electrons can only flow in one direction through the device—from the cathode to the anode. Adding one or more control grids within the tube allows the current between the cathode and anode to be controlled by the voltage on the grids.[5]
What are grid failure reasons in power system?
Grids collapse due to two basic reasons. One is the failure of the equipment, like it happened a decade ago in 2002 when the northern grid collapsed, due to fog/pollution. The second trigger is power suppliers drawing excessive power from the grid. Which results in the balance of power generation and supply goes haywire with a cascading effect. This is probably the reason why the grid failed
What would make the plate of a vacuum tube glow bright red?
That bright red color is heat: infrared energy and visible light. The electrons gain kinetic energy as they accelerate away from the Cathode. As each electron is absorbed into the metal Plate, its kinetic energy becomes acoustic motion in the Plate's atoms - heat. (The plate is being hammered.)It is not normal for vacuum tube circuits to operate at high Plate temperatures that are this conspicuous. This circuit has an excessive product of Plate voltage times Plate current, and/or the vacuum tube Grids are biased incorrectly.One common technique for reducing this heating effect is to use a second Grid near the Plate that is biased much more positive than the Plate. This causes the electrons to decelerate between Grid 2 and the Plate - loosing most of their kinetic energy before absorbtion.
What are the advantages of High Voltage DC transmission over High Voltage AC transmission system?
A few, at least. There are probably more. First, since the frequency is zero, reactive losses due to cable inductance are eliminated. Next, possible health risks due to alternating magnetic fields are reduced. Also, the non-trivial problem of syncronizing two power grids is eliminated. The DC is syncronously converted back to AC at the receiving end's phase and frequency, without regard to the generating end. Another possible benefit (from my point of view at least) is that HVDC systems are, to my knowledge, almost always run underground, eliminating unsightly transmission towers and lines.
