A system for determining parameter settings for a power generation system , the system comprising: at least one processor ; and at least one memory storing computer executable instructions , wherein the at least one memory and the computer executable instructions configured to, with the at least one processor , cause the system to: divide (S101) historical power related data of the power generation system into a plurality of power load segments based on typical power load values and the number of the historical power related data; identify (S102) feasible parameter ranges for each of the plurality of power load segments, wherein each of the feasible parameter ranges is determined as between a value corresponding to a predetermined lower percentile rank in power related data of respective power load segments and a value corresponding to a predetermined higher percentile rank in power related data of respective power load segments; and determine (S103) optimal parameter settings for each of the plurality of power load segments, based on the identified feasible parameters ranges and correlations between system energy efficiency and relative parameters of each of the plurality of power load segments. at least one processor ; and at least one memory storing computer executable instructions , wherein the at least one memory and the computer executable instructions configured to, with the at least one processor , cause the system to: divide (S101) historical power related data of the power generation system into a plurality of power load segments based on typical power load values and the number of the historical power related data; identify (S102) feasible parameter ranges for each of the plurality of power load segments, wherein each of the feasible parameter ranges is determined as between a value corresponding to a predetermined lower percentile rank in power related data of respective power load segments and a value corresponding to a predetermined higher percentile rank in power related data of respective power load segments; and determine (S103) optimal parameter settings for each of the plurality of power load segments, based on the identified feasible parameters ranges and correlations between system energy efficiency and relative parameters of each of the plurality of power load segments. divide (S101) historical power related data of the power generation system into a plurality of power load segments based on typical power load values and the number of the historical power related data; identify (S102) feasible parameter ranges for each of the plurality of power load segments, wherein each of the feasible parameter ranges is determined as between a value corresponding to a predetermined lower percentile rank in power related data of respective power load segments and a value corresponding to a predetermined higher percentile rank in power related data of respective power load segments; and determine (S103) optimal parameter settings for each of the plurality of power load segments, based on the identified feasible parameters ranges and correlations between system energy efficiency and relative parameters of each of the plurality of power load segments. <EOS>