some QOL improvements

csharp/Lib/Units/Composite/AcPower.cs

@@ -6,8 +6,6 @@ namespace InnovEnergy.Lib.Units.Composite;
 
 public sealed class AcPower
 {
-    private AcPower(){}
-
     public required ApparentPower Apparent { get; init; } 
     public required ActivePower   Active   { get; init; } 
     public required ReactivePower Reactive { get; init; } 
@@ -84,23 +82,36 @@ public sealed class AcPower
         };
     }
     
-    public static AcPower Null => FromVoltageCurrentPhi(0, 0, 0);
+    public static AcPower operator +(AcPower left, AcPower right)
+    {
+        return FromActiveReactive
+        (
+            left.Active + right.Active,
+            left.Reactive + right.Reactive
+        );
+    }
+
+    public static AcPower operator -(AcPower left, AcPower right)
+    {
+        return left + -right;
+    }
+
+    public static AcPower operator -(AcPower p)
+    {
+        var activePower   = -p.Active;
+        var reactivePower = -p.Reactive;
+        
+        return FromActiveReactive
+        (
+            activePower,   
+            reactivePower  
+        );
+    }
+
+
+    public static implicit operator AcPower(Double p) => FromActiveReactive(p, 0);
+    public static implicit operator AcPower(Int32  p) => FromActiveReactive(p, 0);
 
-    public static AcPower operator +(AcPower left, AcPower right) => FromActiveReactive
-    (
-        left.Active + right.Active,
-        left.Reactive + right.Reactive
-    );
 
-    public static AcPower operator -(AcPower left, AcPower right) => FromActiveReactive
-    (
-        left.Active - right.Active,
-        left.Reactive - right.Reactive   
-    );
-    
-    public static AcPower operator -(AcPower p) => FromActiveReactive(-p.Active, p.Reactive);
-    
-    
-    
     public override String ToString() => Active.ToString(); // TODO: show all
 }