Dynamic system monitoring and control of sumatera power system using PMU based on DFR

Abstract

Indonesia is a big country which has many isolated power system networks. Sumatera power system is one of the main power system networks in Indonesia that supplies electricity for more than 45 million inhabitants in Sumatera Island. For the transmission topology and load characteristic, there are some dynamic stability problems in Sumatera power system such as voltage and small signal stability. To support the system operators, since the mid of 2014 all transmission lines in the system have been monitored by Digital Fault Recorder (DFR). Furthermore, all DFRs are equipped with synchrophasors facility based on IEEE Std. C37.118 protocol. This paper will tell the assignment of a special team regarding utilization of DFR devices located in the remote substations not only for disturbance data recording but also for dynamic system monitoring and control of Sumatera power system from the control centers. It will explain chronological steps of the team in remotely monitoring DFR devices, solving bottleneck in data traffic, and tuning data parameter in the Master PMU in order to implement dynamic monitoring of Sumatera power system. Furthermore, since the limitation of basic synchrophasors software, the team try to use enhance PMU Data acquisition that support Wide Area Monitoring System (WAMS) based on DFR Data. This paper will describe the experience of the system operators in using the application to control power transfer from southern to the Central Sumatera by monitoring voltage stability phenomena in certain transmission lines. It will also include future plan of the team to synchronize northern and central-southern subsystems while monitoring the small signal stability phenomena between both subsystems. Finally, this paper will tell lesson learned by the team in implementing the action plans.