CAJ | 학술논문

对于低频振荡抑制问题，提出了一种新的电力系统稳定器（ PSS ）及直流附加控制的设计方法。通过改进的总体最小二乘－旋转不变（ TLS-ESPRIT）辨识技术分析系统振荡特性，再对各个振荡模态分别辨识出相应的被控传递函数，最后利用带观测器的线性最优控制（ LQR）方法设计出相应控制器，达到抑制低频振荡的目的。在设计过程中，利用基于LQR的PSS抑制区域内低频振荡，区域间低频振荡通过基于LQR的直流附加控制完成。
대우저빈진탕억제문제，제출료일충신적전력계통은정기（ PSS ）급직류부가공제적설계방법。통과개진적총체최소이승－선전불변（ TLS-ESPRIT）변식기술분석계통진탕특성，재대각개진탕모태분별변식출상응적피공전체함수，최후이용대관측기적선성최우공제（ LQR）방법설계출상응공제기，체도억제저빈진탕적목적。재설계과정중，이용기우LQR적PSS억제구역내저빈진탕，구역간저빈진탕통과기우LQR적직류부가공제완성。
A new design way for power system stabilizer ( PSS) and DC additional controller to solve low frequency os-cillation ( LFO ) problem is proposed .The oscillation characteristics of the system are analyzed through total least squares-estimation of signal parameters via improved rotational invariance techniques ( TLS-ESPRIT) firstly, and then the transfer functions of all oscillation modes are captured respectively .Finally, the controllers are designed out by linear quadratic regulator ( LQR) method with observer .In the designing procedure , the LQR PSS is used for intra-ar-ea LFO and DC additional LQR controller is used for inter-area LFO.