Perancangan PSS dan POD-LQR Menggunakan PSO pada Sistem Tenaga Listrik Bermesin Tunggal dengan TCSC

Hatta Imaduddien Wiennetou, Sarjiya Sarjiya

Abstract


Abstract— Nowadays sudden change in load could lead to instability in power system. Power system needs to be protected to prevent loss synchronization. Power system stability could be increased by installing power system stabilizer (PSS) and thyristor controlled series capacitor (TCSC). A TCSC increases power system stability with helps from power oscillation damping (POD). The performances of PSS and POD are depended on its controller structure. In this research, lead-lag two stages was proposed as controller structure of PSS, and proposed controller structure for POD is linear quadratic regulator (LQR). The controller parameters of PSS and POD were designed by using particle swarm optimization (PSO). The dynamic and stability of power system with proposed controllers was investigated in single machine infinite bus (SMIB) with 0.2 pu increment in electrical power as disturbance. The main objective of this study is to investigate the effectiveness of damping function of proposed method in three different loads. The simulation results show that proposed controller could increase power system stability and reliable in different loads.

Intisari— Pada saat ini, ketidakstabilan sistem tenaga dapat disebabkan oleh perubahan beban secara mendadak ataupun gangguan seperti hubung singkat. Kestabilan sistem tenaga perlu dijaga untuk mencegah lepas sinkronisasi. Kestabilan sistem tenaga dapat ditingkatkan dengan memasang power system stabilizer (PSS) dan thyristor controlled series capacitor (TCSC). Sebuah TCSC mampu meningkatkan kestabilan sistem tenaga dengan bantuan kendali berupa power oscillation damping (POD). Kinerja dari PSS dan POD dipengaruhi oleh struktur kendali peralatan tersebut. Pada penelitian ini, struktur kendali lead-lag dua tingkat digunakan pada PSS, sedangkan struktur kendali bagi POD adalah linear quadratic regulator (LQR). Parameter kendali PSS dan POD dirancang menggunakan particle swarm optimization (PSO). Kendali yang sudah dirancang akan diuji pada model sistem tenaga single machine infinite bus (SMIB) dan menggunakan kenaikan daya elektris sebesar 0,2 pu sebagai gangguan. Tujuan penelitian ini adalah mengetahui kemampuan peredaman dari metode yang diusulkan pada tiga kondisi beban yang berbeda. Hasil penelitian menunjukkan bahwa metode yang diusulkan mampu meningkatkan kestabilan sistem tenaga dan andal pada tiga kondisi beban yang berbeda.

Kata Kunci— SMIB, TCSC, LQR, stabilitas, PSO, PSS.


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References


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DOI: http://dx.doi.org/10.22146/jnteti.v2i2.56

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