Abstract :
To ensure comprehensive and multi-dimension safety of power grid, a hierarchical protection & control system is presented which is composed of traditional protections, substation and regional system based on wide area information. At first, the functions of hierarchical protection & control system are scientifically orientated and compared with traditional function items one by one. Then, the structure and functions of hierarchical protection & control system are studied. Three-layer structure is recommended, the construction scheme is also put forward. Finally, a number of key technologies and difficulties that exist in the process of system construction are proposed. Risks factors including data source, principle and algorithm, function cooperation, communication network, etc, should be identified and assessed. The corresponding contingency plans would be developed.
Keywords :
power system control; power system protection; safety; smart power grids; control system; hierarchical protection; multidimension safety; risks factors; smart power grid; system construction scheme; three-layer structure; wide area information; Communication networks; Power system stability; Protective relaying; Reliability; Smart grids; Substations; hierarchical protection & control system; smart grid; wide area;
