Reactive Power Management By Tagare Pdf Download
I've never heard of that before. Is it something new? It's not new to the power industry, but may be new to you. Reactive power is the type of electricity that cannot be used for much other than powering electric motors. The best way to manage reactive power is through a process called tagging, which lets you decide how much reactive power you need at any given time. This article will explore what reactive power is and how it works by describing one step in the tagging process. Why is reactive power useful? Reactive power is important for these reasons: The main purpose of reactive power is to transfer power between two AC systems that operate at different frequencies. Commercial electric grids operate at 60 Hz, while industrial systems may run at 400 Hz. These differences can cause current imbalances between the two systems, which can lead to voltage drop and even damage equipment. By controlling reactive load, it's possible to maintain an equal voltage across both systems without concern for line loss or equipment damage. The ability to transfer AC power through transformers is possible because transformers act as inductors with alternating current (AC). Transformers store energy in this inductor-like core whenever the current flowing through them changes direction. When the current changes direction the transformer's magnetic field is cut off, which induces an electric potential in its secondary circuit. The part of this induced voltage that opposes the flow of current is termed reactive power. As stated above, reactive power cannot be used to perform other types of work in most cases. This can be very wasteful when large amounts are necessary, like in industrial settings with motors and generators. The best way to manage reactive power is through tagging. To understand what tagging is and how it works, let's consider what happens when two systems are connected through a load that requires substantial reactive power to maintain voltage balance between them. What happens when connecting two systems First, let's take a look at what happens if we connect two systems without any reactive balancing. We'll assume that our load (the part of the system that requires reactive power) is a generator in an industrial setting: Without any control of reactive power, we'd end up with a voltage imbalance across the generator and the grid. There would be an overvoltage on the generator side and an undersvoltage on the grid side. This imbalance would cause current to flow from the generator to the grid in undesirable amounts, which could damage equipment and reduce voltage levels across equipment on both sides of the connection. What happens when we add reactive power With our load this time being a motor in an industrial setting: Now we can see that we have a voltage imbalance between the grid and the generator, and again current flows from the generator to the grid in undesirable amounts. What we'd like to avoid is either of these two things happening. If we had enough reactive power, we could maintain the situation above by finding a way to stop current flowing from the source to the load. In this case that means stopping current from flowing on one side of our converter, which would provide us with an overvoltage on that side and undervoltage on the other side.
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