Method for calculating nodal impedance matrix of power system based on sparse symmetric matrix technology by virtue of improved CU triangular decomposition

Method for calculating nodal impedance matrix of power system based on sparse symmetric matrix technology by virtue of improved CU triangular decomposition

  • CN 104,572,586 A
  • Filed: 12/17/2014
  • Published: 04/29/2015
  • Est. Priority Date: 12/17/2014
  • Status: Active Application
First Claim
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1. ask for a method for electric system nodal impedance matrix based on the improvement CU triangle decomposition of symmetrical and sparse technology, its feature comprises the following steps:

  • Step 1;

    read in n node system each circuit branch data file;

    Step 2;

    form bus admittance matrix Y;

    Step 3;

    according to openness and symmetry, CU triangle decomposition is carried out to Y battle array, and record U battle array nonzero element position;

    Step 4;

    according to CW k=E konly ask for w kkelement;

    Step 5;

    according to UZ k=W kz is asked in the openness back substitution of application U array element element kbattle array diagonal element Z kkand above off-diagonal element;

    Step 6;

    ask diagonal element Z according to symmetry kkwith the off-diagonal element on a left side;

    Step 7;

    by Z battle array write data file.

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