Zero droop voltage control for smart inverters
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United States of America Patent
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Apr 17, 2018
Grant Date -
Feb 9, 2017
app pub date -
Oct 21, 2016
filing date -
Sep 16, 2011
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Abstract
Systems and methods for controlling grid voltage include a distribution power network and one or more smart inverters at or near the edge of the distribution power network, each smart inverter configured to absorb or insert VARs to control the voltage based on a reference Q value, wherein the reference Q value is calculated by a reference Q calculator. A reference Q calculator includes a processor and a non-transitory computer readable memory with software embedded thereon, the software configured to cause the processor to receive a voltage measurement taken at or near the edge of a power distribution grid, a voltage band value, and a voltage set point value, determine a difference, ev, between the voltage measurement and the voltage set point, generate a new reference Q value if an absolute value of ev is greater than the voltage band value, and cause the smart inverter to either absorb or insert VARs depending on the sign of ev.
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