Implementation of Intersubstation IEC 61850 GOOSE Message for Distance Protection Scheme with Teleprotection

Transmission line protection system isolates transmission lines from both temporary and permanent faults. For many years, distance protection relays have been used to provide a simple yet reliable transmission line protection system. Distance protection has several protected zones based on transmission line impedance measurements, typically zone1 as main protection, zone2 and zone3 as remote backup protection. However, instantaneous zone 1 only covers 80%-90% of the protected transmission line. As a result, there is a section on the transmission line when faults occur cleared by time delay zone 2. Additionally, the auto reclose function also cannot be applied to the fault detected in this section. The distance protection relay is equipped with a teleprotection device to work selectively and instantly in the protected zone. But several substations are not equipped with teleprotection devices therefore they still use the basic distance scheme. As a result, if a transient fault occurs in zone 2, the CB will not reclose but trip with a time delay and increased outage frequency even from a transient fault. This paper proposed an intersubstation IEC 61850 GOOSE Message for distance protection scheme with teleprotection by transmitting GOOSE Messages through the intranet. The configuration, function testing, and performance are all discussed based on the implementation in the Rangkas-Bunar 70 kV Transmission Line. The results showed that the proposed scheme succeeded in improving distance protection by ensuring continuity of electricity transmission in the event of a transient fault.

I. Introduction

The outage of a transmission line can have a great impact on the reliability of the system. For simplicity, the combination of distance protection with autoreclose function has been widely employed to clear transient faults that occur on the protected transmission line [1]. Distance protection operates using voltage and current measurements to determine whether a fault is in the protection zone of the transmission line [2]. However, the basic distance protection scheme only provides instantaneous zone 1 tripping for 80%-90% of transmission line length to be sure that does not overreach the end of the line section [3]. The zone 2 time delay distance protection will cover the rest of the transmission line, as consequence, there is a fault on the transmission line that forced outage of the transmission line even from a transient fault.