- Phase Measuring Units (PMU) Program
Utilities around the world have been installing phase measuring units (PMU), or synchrophasors, systems to analyze power system behavior. Historically, PMUs have been used for visualization and post-event analysis, but new technologies allow PMUs to be processed in real time, meaning they can be used for real-time wide-area protection and control.
We provided design services for installation of either control PMU systems or data PMU systems at 20 of BPA’s substations. The PMUs are used to predict impending voltage instability, provide high-speed control for mitigation, and monitor and measure intermittent and steady generation sources to control stability impacts on BPA’s system.
Each of the 500-kV and 230-kV substations included double bus, ring bus, and breaker-and-a-half configurations. Each control system had reliability, availability and serviceability (RAS) redundancy and gathered up to 12 line-currents, four bus voltages, and RTS and 52b status. Each data system gathered up to six line-currents, two bus voltages, and relay test system (RTS) and 52b status. The designs also included replacing 48VDC substation battery systems, 125VDC panels, DC panels, installing cable trays, GPS antennas, network management system (NMS) routers, terminal servers, comm switches, PMU routers and fiber optic cable.
Our team coordinated construction among the client and other joint site owners, including Seattle City Light, Clark County Public Utility District and the U.S. Bureau of Reclamation.
- Detailed engineering design
- Material procurement
- Construction management
- Outage scheduling
- Dual and quad control PMU panel and data PMU panel designs gathering time-stamped line-currents, bus voltages, GPS, breaker status and relay trip status for substations
- PMU comm panel design featuring NMS Routers, NMS terminal servers, comm switches, and PMU routers
- Full construction and demolition plan, and outage plans between multiple entities
- 20 unique substation PMU system designs across four states in double bus, ring bus, and breaker-and-a-half substations