A Power Load Forecasting Model Based on FA-CSSA-ELM

Table 1

Four types of evaluation functions.

Metrics	Definition	Equation
RMSE	The square root of average of the error squares
MAPE	The average of absolute percentage error
MSE	The square root of the mean of the sum of squares of the errors
MAE	The average value of the absolute error between the observed value and the true value

: i-th sample of expected output; : i-th sample of predicted output; : sample size.