ClosedBranchSide2DcFlowEquationTerm.java
/**
* Copyright (c) 2019, RTE (http://www.rte-france.com)
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
* SPDX-License-Identifier: MPL-2.0
*/
package com.powsybl.openloadflow.dc.equations;
import com.powsybl.openloadflow.equations.Variable;
import com.powsybl.openloadflow.equations.VariableSet;
import com.powsybl.openloadflow.network.LfBranch;
import com.powsybl.openloadflow.network.LfBus;
import java.util.Objects;
import static com.powsybl.openloadflow.network.PiModel.A2;
/**
* @author Geoffroy Jamgotchian {@literal <geoffroy.jamgotchian at rte-france.com>}
*/
public final class ClosedBranchSide2DcFlowEquationTerm extends AbstractClosedBranchDcFlowEquationTerm {
private ClosedBranchSide2DcFlowEquationTerm(LfBranch branch, LfBus bus1, LfBus bus2, VariableSet<DcVariableType> variableSet,
boolean deriveA1, boolean useTransformerRatio, DcApproximationType dcApproximationType) {
super(branch, bus1, bus2, variableSet, deriveA1, useTransformerRatio, dcApproximationType);
}
public static ClosedBranchSide2DcFlowEquationTerm create(LfBranch branch, LfBus bus1, LfBus bus2, VariableSet<DcVariableType> variableSet,
boolean deriveA1, boolean useTransformerRatio, DcApproximationType dcApproximationType) {
Objects.requireNonNull(branch);
Objects.requireNonNull(bus1);
Objects.requireNonNull(bus2);
Objects.requireNonNull(variableSet);
return new ClosedBranchSide2DcFlowEquationTerm(branch, bus1, bus2, variableSet, deriveA1, useTransformerRatio, dcApproximationType);
}
@Override
protected double eval(double ph1, double ph2, double a1) {
double deltaPhase = ph2 - ph1 + A2 - a1;
return getPower() * deltaPhase;
}
@Override
public double der(Variable<DcVariableType> variable) {
Objects.requireNonNull(variable);
if (variable.equals(ph1Var)) {
return -getPower();
} else if (variable.equals(ph2Var)) {
return getPower();
} else if (variable.equals(a1Var)) {
return -getPower();
} else {
throw new IllegalStateException("Unknown variable: " + variable);
}
}
@Override
public double rhs() {
if (a1Var != null) {
return getPower() * A2;
} else {
return getPower() * (A2 - a1());
}
}
@Override
protected String getName() {
return "dc_p_2";
}
}