SIMULASI PEMODELAN KARAKTERISTIK SISTEM EKSITASI STATIS PADA PLTGU UNIT 3.1 PT. PJB UP GRESIK MENGGUNAKAN PERANGKAT LUNAK MATLAB
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Institusion
Institut Teknologi Perusahaan Listrik Negara
Author
Ryan Alkhafi, Achmad
Alvianingsih, Ginas
Alvianingsih, Ginas
Subject
Teknik Elektro
Datestamp
2022-10-31 04:15:11
Abstract :
The excitation system is a system used to supply rotor coils excitation current. When the rotor is turned by the prime mover, the stator coils will experience an induced emf. The size of the provided excitation current is controlled by the AVR. The AVR does not regulate the current directly, but rather the firing angle. When the firing angle value is too big, the resulting excitation current is smaller so that there is the possibility for underexcitation, whereas if the firing angle value is too low, the excitation current generated is greater so that there is the potential for overexcitation. In addition to influencing the excitation current, firing angle also impacts the excitation voltage and terminal voltage in an inversely proportional manner. In the excitation system of PLTGU unit 3.1 PT. PJB UP Gresik, it was discovered that the firing angle varies with the rise in load. With this knowledge, the researchers used Simulink to model a static excitation system for their investigation. There are two types of testing conducted: variable and constant loads. The results of the load simulation test vary based on the load data in March 2022, the firing angle an the generator operates between 57,3910? and 71,9608?, but the constant load test at peak load varies between 60? and 70?.
The excitation system is a system used to supply rotor coils excitation current. When the rotor is turned by the prime mover, the stator coils will experience an induced emf. The size of the provided excitation current is controlled by the AVR. The AVR does not regulate the current directly, but rather the firing angle. When the firing angle value is too big, the resulting excitation current is smaller so that there is the possibility for underexcitation, whereas if the firing angle value is too low, the excitation current generated is greater so that there is the potential for overexcitation. In addition to influencing the excitation current, firing angle also impacts the excitation voltage and terminal voltage in an inversely proportional manner. In the excitation system of PLTGU unit 3.1 PT. PJB UP Gresik, it was discovered that the firing angle varies with the rise in load. With this knowledge, the researchers used Simulink to model a static excitation system for their investigation. There are two types of testing conducted: variable and constant loads. The results of the load simulation test vary based on the load data in March 2022, the firing angle an the generator operates between 57,3910? and 71,9608?, but the constant load test at peak load varies between 60? and 70?.
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