Enhanced Power Grid Efficiency through Improved Phasor Measurement Cleaning
Phasor Measurement Cleaning Summary (265 KB)
Power suppliers must monitor the electricity levels within their power grids to ensure that the proper amount of electricity is being sent where it is needed. Power consumption levels are monitored using phasor measurement units (PMUs), which measure the electrical waves within both standard and smart grids. While PMUs are state-of-the-art technology, they report inaccurate measurements that can result in inaccurate grid state estimations and potentially lead to power outages. The standard method to account for faulty data, the largest residual removal algorithm, requires comparisons with a large body of pre-existing data, which is impractical when new components are added. The smart grid market is projected to reach $9.6 billion by 2015, and improved data cleaning measures will be needed to ensure quality service to these customers.Description
Researchers at Colorado State University have created two new algorithms designed to remove faulty data from PMU readings. The first algorithm seeks out faulty data by first accounting for the sparsity of the faulty data points, and then comparing all data points to a syndrome, or calculated faulty data point. The second algorithm then eliminates each faulty data point from the data set by determining the locations of faulty data and directly removing those points.
These new algorithms have the advantages of being less complex than other standard and experimental methods, as well as more reliable in eliminating faulty data. As a result, estimations of the grid state are more accurate and the grid is more efficient. They ensure accuracy through continuous and repeated checks of the data set. These new algorithms are able to increase the accuracy of the grid state estimation without the need for adding more PMUs or more sensitive PMUs.
This new method of faulty data removal is especially appealing to power companies that need to estimate their grid state accurately. It offers a more reliable estimation of the grid state, enabling power companies to conserve electricity and create the most efficient power grid possible. PMUs are already in place within existing power grids, but they are expected to play an even larger role in smart grids. The new algorithms will be useful in both forms of power grid.Benefits
- More effective and less complex than traditional bad data removal methods
- More accurate grid state estimation without additional PMU installation, thus reducing installation and monitoring costs.
- Saves money for power companies and consumers by increasing grid efficiency without performance loss
- Data cleaning within power grids to increase efficiency
|Technology ID||Development Stage||Availability||Published||Last Updated|
|12-040||Prototype - Verified in laboratory setting; ready for larger-scale validation||Available - Available for exclusive or non-exclusive licensing||07/12/2012||10/02/2012|