In certain situations, it is necessary to consider the use of an alternate control means to enhance and insure power system stability such as an emergency state control. A class of switchable supplementary controls, such as dynamic brakes, shunt reactor or series capacitors could be utilized. The effectiveness of network switching on a one machine system has been well established. However the interaction between closely coupled machines and groups of machines as a result of a control action has not been fully considered. The contribution of the paper is in the area of multimachine control, and, in particular, a power system emergency state control. Topics concerning control models, optimization criteria and characteristics of supplementary controls have been addressed. Dynamic programming is used to derive a switching strategy which takes the form of a closed-loop control. The control strategy is evaluated through the digital simulation of a two machine test system.
ASJC Scopus subject areas
- Electrical and Electronic Engineering