praktikum-holons/src/blackstart/resistanceCalculator.java

package blackstart;

import classes.*;
import com.google.gson.annotations.Expose;
import ui.model.Model;

public class resistanceCalculator {

    @Expose
    private int voltage;

    @Expose
    private int diameter;

    @Expose
    private double specificMaterialResistance;

    public resistanceCalculator(int voltage, int diameter, double specificMaterialResistance){
        this.voltage = voltage;
        this.diameter = diameter;
        this.specificMaterialResistance = specificMaterialResistance;
    }

    void setDistancesToCalcResistance(HolonObject powerPlant) {
        if (powerPlant != null) {
            // travers
            if (powerPlant.getConnectedTo().size() > 0) {
                for (CpsEdge edge : powerPlant.getConnectedTo()) {
                    if (powerPlant.getId() == edge.getA().getId()) {
                        traversEdges(edge.getB(), powerPlant, calcEdgeLength(edge));
                    } else {
                        traversEdges(edge.getA(), powerPlant, calcEdgeLength(edge));
                    }
                }
            } else {
                System.out.println("Nothing connected to powerplant");
            }
        } else {
            System.out.println("No powerplant connected");
        }
    }

    private void traversEdges(AbstractCpsObject currentObject, AbstractCpsObject last, double distance) {
        if (currentObject.getConnectedTo().size() > 1) { // recursive call for all edges
            for (CpsEdge edge : currentObject.getConnectedTo()) {
                if (currentObject.getId() == edge.getA().getId()) { // look at which way the edge points
                    if (last.getId() != edge.getB().getId()) {
                        traversEdges(edge.getB(), currentObject, distance + calcEdgeLength(edge));
                    }
                } else {
                    if (last.getId() != edge.getA().getId()) {
                        traversEdges(edge.getA(), currentObject, distance + calcEdgeLength(edge));
                    }
                }
            }
        } else { // at leaf
            for (HolonElement ele : ((HolonObject) currentObject).getElements()) {
                ele.setDistance(distance);
            }
        }
    }

    private double calcEdgeLength(CpsEdge edge) {
        Position aPos = edge.getA().getPosition();
        Position bPos = edge.getB().getPosition();
        double xDiff = Math.abs(aPos.x - bPos.x);
        double yDiff = Math.abs(aPos.y - bPos.y);
        return Math.sqrt(Math.pow(xDiff, 2) + Math.pow(yDiff, 2));
    }

    public float calcEnergyAfterResistance(float currentEnergy, double distance, float energyRequiredForPowerplantBlackstart){
        double blackstartResistance = blackstartResistance(voltage, energyRequiredForPowerplantBlackstart);
        double cableResistance = cableResistance(specificMaterialResistance, distance, diameter);

        return (float) (1 - (cableResistance / (cableResistance + blackstartResistance))) * currentEnergy;
    }

    private double blackstartResistance(int voltage, float energyRequiredForPowerplantBlackstart){
        return Math.pow(voltage, 2) / energyRequiredForPowerplantBlackstart;
    }

    private double cableResistance(double specificMaterialResistance, double distance, int diameter){
        return specificMaterialResistance * (distance / (0.25 * Math.PI * Math.pow(diameter, 2)));
    }

    public float calcEnergyNeededForCertainEnergyAfterResistance(float energyWanted, double distance, float energyRequiredForPowerplantBlackstart){
        double blackstartResistance = blackstartResistance(voltage, energyRequiredForPowerplantBlackstart);
        double cableResistance = cableResistance(specificMaterialResistance, distance, diameter);

        return (float) (energyWanted / (1 - (cableResistance / (cableResistance + blackstartResistance))));
    }
}