Method for calculating availability for line power systems

A method for calculating availability for a line power system, the line power system including at least one power circuit unit interconnecting a first location and a second location, the method comprising:

• determining a loop length required for the line power system;
• determining a number of first and second location circuits for the line power system;
• calculating a number of line power system circuits based on the loop length, the number of first location circuits, and the number of second location circuits;
• calculating a total power delivered over the line power system;
• calculating a first location circuit availability measure and a second circuit availability measure based on the loop length, the number of first location circuits, the number of second location circuits, the number of line power system circuits, the total power delivered, and at least one parameter representing at least one of a second location, an environmental variable, and a failure or repair statistic associated with the line power system;
• calculating a line power system availability measure based on the loop length, the number of first location circuits, the number of second location circuits, the required number of line power system circuits, the total power delivered, and at least one parameter representing second locations or repair time statistics associated with the line power system;
• and
• generating a calculated line power system availability plot.