The invention relates to the field of
electric energy quality evaluation, and particularly discloses an
electric energy quality evaluation method and
system. The method comprises the steps of obtaining a plurality of evaluation parameters based on collected
electric energy data, and constructing an evaluation parameter matrix based on the evaluation parameters; based on the plurality of evaluation parameters, obtaining a correlation parameter matrix through
correlation analysis; performing
orthogonal rotation operation on the related parameter matrix to obtain a final related parameter matrix; and obtaining a
coefficient matrix based on the final related parameter matrix, continuously multiplying the
coefficient matrix by the evaluation parameter matrix and the
expert evaluation matrix to obtain an
evaluation result matrix, and calculating a modulus of the
evaluation result matrix to obtain an evaluation value of the
power quality. According to the method, the evaluation parameters are obtained by
processing the electric energy initial data,
correlation analysis is carried out on the evaluation parameters, related data with large influence are reserved, and dispute caused by manual screening is avoided. Meanwhile, assessment experience of experts is introduced into
assessment data processing, so that assessment of the
system is more objective and has reference value.