CAJ | 학술논문

电力系统稳定器（ PSS）能够很好地抑制电力系统低频振荡，其参数的整定尤为重要。一般处理方法是将系统状态矩阵特征值实部和阻尼比分别加权转换成单目标问题，进而用优化算法对PSS控制器参数进行优化，而权重的选取对参数影响极大。以特征值实部和阻尼比作为两个目标，用NSGA-Ⅱ多目标进化算法优化处理，最后与传统的遗传算法相比较。仿真结果表明，采用NSGA-Ⅱ算法设计的PSS控制器，可以有效地阻尼电力系统低频振荡。
전력계통은정기（ PSS）능구흔호지억제전력계통저빈진탕，기삼수적정정우위중요。일반처리방법시장계통상태구진특정치실부화조니비분별가권전환성단목표문제，진이용우화산법대PSS공제기삼수진행우화，이권중적선취대삼수영향겁대。이특정치실부화조니비작위량개목표，용NSGA-Ⅱ다목표진화산법우화처리，최후여전통적유전산법상비교。방진결과표명，채용NSGA-Ⅱ산법설계적PSS공제기，가이유효지조니전력계통저빈진탕。
Power system stabilizer ( PSS) can inhibit the low-frequency oscillation well and the selection of its parameters is particularly important.Generally, both the real part and damping ratio of the eigenvalue of the system state matrix are weighted and then it is transformed into a single objective problem to design the controller parameters of PSS using optimization algo -rithm, but the parameters are influenced greatly by the selection of the weight .The real part and damping ratio of the eigenval-ue are considered as two objectives to optimize the parameters using NSGA -II multi-objective evolutionary algorithm .Com-paring with the traditional methods , the simulation results show that the PSS controller designed by NSGA -II algorithm can damp the low-frequency oscillation of power system effectively .