calculation methods		The calculated value (MWh)	The reference value (MWh)	the relative error
The original method	dayA	132.25	189.24	30.13%
The original method	dayB	127.61	189.24	32.56%
The improved method	expected output	145.73	189.24	22.99%
The improved method	equivalent output	170.56	189.24	9.88%