Wide Area Monitoring with SynchrophasorMeasurements has become of great interest in supervision of stability for transmission systems. With the acquisition of the phasor measurements using Phasor Measurement Units (PMU), a new quality of insight into the dynamic behavior of the electric power network has become possible. The value of this method is increasing because of more dynamic requirements for the system caused by renewable power infeed such as wind and solar and energy trade. The renewable power infeed goes to a quite high amount into the distribution networks so that at that level, also the dynamic processes are increasing. The distribution networks are taking over more tasks that have been reserved for transmission networks in the past, so the supervision is also important for the distribution level. This paper discusses applications for that. An example for the use of synchrophasors for energy accounting is given. Finally, the status of standardization is presented.

-The increasing amount of renewable power from wind and solar generation causes higher fluctuation in power generation and in general increased distances between generation and load. Both aspects influence the system stability of electricity transmission in a negative way. Therefore, additional measures to ensure stable and secure operation of the system are necessary. Time stamped synchrophasor measurements lay the foundation for development of new realtime applications for security and stability assessment. The paper provides overview of existing solutions for synchrophasor based security assessment and sheds light on ongoing research activities that focus on exploiting wide-area synchrophasor measurements for real-time security assessment of sustainable power systems. At last, an mathematical mapping enabling informative visualization of the system state in respect to aperiodic rotor angle stability is described and analyzed in detailed.

No abstract

There is a simple rule to design a robust linear Power-System Stabilizer (PSS) which is optimal independent of the network structure and operation point. Only the setting of voltage regulator determines the adjustingparameters. The paper shows the behaviourof such a PSS iftwo different modes ofpower swings occu): Both are damped as quickly as possible ifthe load angle of the generator does not become negative or larger than 90".

No abstract