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METHOD FOR CALCULATING CONTINUATION POWER FLOW OF ELECTRIC POWER SYSTEM

  • US 20140222227A1
  • Filed: 02/06/2014
  • Published: 08/07/2014
  • Est. Priority Date: 02/06/2013
  • Status: Active Grant
First Claim
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1. A method for calculating a continuation power flow of an electric power system, comprising:

  • establishing a first power flow equation for each of a plurality of PQ buses to obtain a plurality of first power flow equations, and establishing a second power flow equation for each of a plurality of PV buses to obtain a plurality of second power flow equations, wherein the PV bus is a bus having an known injected active power and a known voltage magnitude, the PQ bus is a bus having a known injected active power and a known injected reactive power;

    establishing a group of power flow equations according to the plurality of first flow equations, the plurality of second power flow equations, and a voltage magnitude and a voltage phase of a balance bus;

    choosing a bus having a fastest voltage drop as a parameterization bus, and defining a parameterization variable according to a voltage magnitude of the parameterization bus and the load growth factor;

    defining an equality constraint equation according to the parameterization variable, and generating an extended power flow equation according to the equality constraint equation and the group of power flow equations;

    solving the extended power flow equation by a plurality of iterations to obtain a plurality of load summations; and

    generating a P-V curve according to the plurality of load summations.

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