添加直接给出DG有功、无功的函数

Signed-off-by: dmy@lab <dmy@lab.lab>

testHasttable/element/dg.cpp

@@ -11,6 +11,15 @@ DG::~DG()
 
 }
 
+double DG::getPG(double pf)//有功出力,满发情况
+{
+    return pf*(this->capacity);
+}
+double DG::getQG(double pf)//无功出力,满发情况
+{
+    return std::sqrt(1-pf*pf)*this->capacity;
+}
+
 void DG::extract()
 {
     //单位阻抗

testHasttable/element/dg.h

@@ -3,12 +3,15 @@
 
 #include <QPair>
 #include <QString>
+#include <cmath>
 #include "branch.h"
 class DG:public Branch
 {
 public:
     DG(const QPair<QString, QString> &fromTo, double DGCapacity, const QString &id, QObject *parent=0);
     DG();
+    double getPG(double pf);//有功出力
+    double getQG(double pf);//无功出力
     ~DG();
     QString id;
     double capacity;