What is difference between AC and DC load line?

Electrical power first flows from the power plant to the electrical substation. There it is transformed from AC to DC. In the power plant, AC power is generated by revolving a lot of DC power. But in the substation, AC power is generated by spinning a few DC power and passing it through a transformer. Then power is distributed to different parts of the city via high voltage cables. Consumers receive the power via low voltage cables. But both AC and DC flow in a lot of the same wires, which probably confuses you. AC and DC flow in the same wires is popularly known as “distributed generation”.

What is ac?

Ac stands for across(across the country) or amplitude (amplitude modulation) It is one of the KPIs of a good advertiser. It is the amount of impact that the advertisement leaves on the people. If you advertise some product in a newspaper, and the advertisement is not seen by most people(like if you put the advertisement on a page where a lot of people read), then your advertisement is low in ac.

What is a DC load line?

DC load line is the characteristic of an ideal load or a resistor. It shows how the voltage and current vary as the load varied. The current and voltage characteristics of a DC circuit should be almost the same, and when a voltage source is connected to different resistors, the current and voltage are different for each resistor.

A DC load line shows the relationship between voltage, current and power in a circuit with resistors. Basically, it is the curve on graph paper that you draw using Ohm’s law. It is plotted in the complex plane, which means the two axes are not independent. The horizontal axis represents the voltage and the vertical axis represents the current. So the load line is actually a line in the complex plane. It is very useful in designing filters and amplifiers.

Difference between AC and DC load line

The current along with the line AB and CD are both DC loads. The voltage along the lines is constant and the power consumed by the load is constant. So AB should be a straight line and CD should be a straight line. But, AC circuits behave differently. The total power consumed by AC load circuits is not constant and the voltage between points A and B is not constant. So AC load lines are not straight lines. The load lines consist of many straight lines and these lines are located at constant voltage and constant current.

The load lines represent the load required by the load, and the operating point is the current and the voltage on the operating line. The rectifier converts the electrical current into a constant DC voltage to operate the load. The DC load line passes through the origin, so the load line must also pass around the origin. The operating point is the intersection of the operating curve and the operating line. The operating point coordinates are roughly represented by the forward and reverse power. AC load line and DC load line share the same load point, but they are independent of each other.

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