PENGGUNAAN RELAY SIPROTEC V UNTUK PROTEKSI TRANSFORMATOR 150 KV / 20 KV DI GARDU INDUK
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Institusion
Institut Teknologi Perusahaan Listrik Negara
Author
Purba, Andreas Calvin Natanael
Tambunan, Juara Mangapul
Tambunan, Juara Mangapul
Subject
Teknik Elektro
Datestamp
2019-12-11 04:44:54
Abstract :
Protection sytem is a protection or isolation in parts enable to occur the diturbance or danger. The main purpose of protection is to prevent and extinguish the disturbance that have happened and localize them, and control their effects. This paper focus on the protection system needed by transformer. There are two types of disturbance in transformer, i.e. internal and external disturbances. The transformer shows mechanical and electrical protection while in external disturbances, the transformer only shows the electrical protection while in internal disturbances. The transformer protection relay discussed in this occasion is Siprotec V Siemens manufacturer. Siprotec V is the latest generation of Siemens protection systems. Siemens also uses their own softrware for its relay settings, called as DIGSI. Before the relay energized at the switchgear, siemens as the manufacturer must ensure thar all the functions of the relay working properly. Tests are carried out using an Omicron CMC device that can simulate current and voltage in the relay as in the substation. Result of the differential relay calculation on the protection panel are as follows. Idiff shows a value of 0,09625 A, Irestrain shows a value of 0,8179 A, Ipickup side of 150 kV is 0,15936 A and Ipickup side 20 kV is 0,173205 A. Calculation of the overcurrent relay when fault current of 2 times, 3 times, and 4 times Isetting were given shows trip times of 10,03 seconds, 6,30 seconds, 4,980 seconds. Moreover overcurrent side 20 kV contains SBEF function, with the calculation of trip time showing respective value of 3,0087 seconds, 1,9805 seconds, and 1,4939 seconds when 2 times, 3 times, and 4 times Isetting fault current were given.
Protection sytem is a protection or isolation in parts enable to occur the diturbance or danger. The main purpose of protection is to prevent and extinguish the disturbance that have happened and localize them, and control their effects. This paper focus on the protection system needed by transformer. There are two types of disturbance in transformer, i.e. internal and external disturbances. The transformer shows mechanical and electrical protection while in external disturbances, the transformer only shows the electrical protection while in internal disturbances. The transformer protection relay discussed in this occasion is Siprotec V Siemens manufacturer. Siprotec V is the latest generation of Siemens protection systems. Siemens also uses their own softrware for its relay settings, called as DIGSI. Before the relay energized at the switchgear, siemens as the manufacturer must ensure thar all the functions of the relay working properly. Tests are carried out using an Omicron CMC device that can simulate current and voltage in the relay as in the substation. Result of the differential relay calculation on the protection panel are as follows. Idiff shows a value of 0,09625 A, Irestrain shows a value of 0,8179 A, Ipickup side of 150 kV is 0,15936 A and Ipickup side 20 kV is 0,173205 A. Calculation of the overcurrent relay when fault current of 2 times, 3 times, and 4 times Isetting were given shows trip times of 10,03 seconds, 6,30 seconds, 4,980 seconds. Moreover overcurrent side 20 kV contains SBEF function, with the calculation of trip time showing respective value of 3,0087 seconds, 1,9805 seconds, and 1,4939 seconds when 2 times, 3 times, and 4 times Isetting fault current were given.
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