The megavolt-ampere reactive (MVAR) is a unit of measurement used in electrical systems to quantify reactive power, which is the non-working power component in an AC circuit. Unlike real power (measured in watts), which performs actual work, reactive power is essential for maintaining voltage levels necessary for active power to flow through the grid. Think of it like the foam on a latte—it doesn’t contribute to the coffee’s caffeination but is critical for its quality and structure.
Engineers use MVARs to optimize the efficiency of power delivery, ensuring systems don’t become overloaded. This balance is vital for the stability of power grids, especially as renewable energy sources like wind and solar, which are often variable and intermittent, become more prevalent in our energy mix.
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