DECENTRALIZED COMMUNICATION AND CONTROL SYSTEMS FOR POWER SYSTEM OPERATION
MetadataShow full item record
Due to the rapid increase of phasor measurement units (PMUs) installed in largely interconnected power systems, great opportunities have been opened for new applications to improve system stability and to enhance the operation of the grid. To take advantage of high sampling rate of these measurement data (30-120 samples per second) which data can illustrate great details about system dynamic performance, a high band-width, networked communication system is required. The specification for the next generation communication system that overlay the continental power grids are under intense discussion. Although PMU based monitoring systems have been widely used, work on PMU based fast acting closed loop wide-area control systems which has stringent latency requirements is relatively rare. Since traditional communication links with centralized topology will not be able to meet the stringent latency requirements, a new communication topology that provides reasonable delay and makes both communication network and power infrastructures to collaborate strongly needs to be provided. In this dissertation, a combined process for design and simulation of both communication network and power network has been presented with the objective of damping inter-area oscillations. This process is used to validate the adequacy of a communication system for a particular transmission grid. A method to determine the optimal location of data routing hubs so as to minimize the volume of communications is also proposed. The two-area benchmark system and IEEE 118 bus system is used to study the performance of communication system and the wide area power damping control system on both centralized and decentralized topologies, and the results are discussed. At the end of this dissertation, we show that the decentralized communication topology, involving data routing hubs, is better suited for control applications requiring fast control actions.