snl.ccss.jpowerflow.ac
Class DecoupledNewton

java.lang.Object
  snl.ccss.jpowerflow.AbstractPFSolver
      snl.ccss.jpowerflow.ac.FullNewton
          snl.ccss.jpowerflow.ac.DecoupledNewton

All Implemented Interfaces:

java.lang.Runnable, PFSolver

public class DecoupledNewton
extends FullNewton

This class extends FullNewton and performs a faster but less accurate steady-state power flow analysis. This class uses the Decoupled Newton-Raphson iterative technique for solving the unknowns in the power system.

Author:

Bryan T. Richardson - Sandia National Laboratories

Field Summary

Fields inherited from class snl.ccss.jpowerflow.AbstractPFSolver

DEBUG

Constructor Summary

DecoupledNewton()
Default constructor for DecoupledNewton class.

DecoupledNewton(int maxIterations, double adjustError, double convergeError, boolean enforceGenMvarLimits)
Argument-accepting constructor for DecoupledNewton class.

Method Summary

boolean

solve(PFPowerSystem powerSystem) Main method for performing an AC power flow analysis.

Methods inherited from class snl.ccss.jpowerflow.ac.FullNewton

getIterations, setAdjustError, setConvergeError, setEnforceGenMvarLimits, setMaxIterations

Methods inherited from class snl.ccss.jpowerflow.AbstractPFSolver

run, setPowerSystem

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DecoupledNewton

public DecoupledNewton()

Default constructor for DecoupledNewton class. Required parameters will need to be set using the get/set methods if this constructor is used.

DecoupledNewton

public DecoupledNewton(int maxIterations,
                       double adjustError,
                       double convergeError,
                       boolean enforceGenMvarLimits)

Argument-accepting constructor for DecoupledNewton class.

Parameters:

maxIterations - Maximum number of iterations to perform

adjustError - Value of power mismatch that determines when generator reactive power limits should be examined

convergeError - Value of power mismatch that determines the system has converged

enforceGenMvarLimits - Set to true if reactive power limits of generators should be enforced

Method Detail

solve

public boolean solve(PFPowerSystem powerSystem)

Main method for performing an AC power flow analysis. This method builds the yBus for the system and performs the Decoupled Newton-Raphson iterative technique to solve for the unknown values.

Specified by:

solve in interface PFSolver

Overrides:

solve in class FullNewton

Parameters:

powerSystem - PFPowerSystem that implements the required getBusList and getEnergizedBranchList methods

Returns:

true if simulation converged within maximum number of iterations