Corrected sign error for "power(n)".
Corrected sign error for "power(n)".

PowerSystemsHIL/EPHCC,PowerSystemsHIL/EPHCC,PowerSystemsHIL/EPHCC,PowerSystemsHIL/EPHCC,PowerSystemsHIL/EPHCC,PowerSystemsHIL/EPHCC,PowerSystemsHIL/EPHCC,PowerSystemsHIL/EPHCC