COMBINED ACTIVE REACTIVE DESPATCH .2. TEST-RESULTS

A series of tests have been conducted on the combined active and react ive despatch algorithm presented in a companion paper. The ability of the algorithm to optimise the performance of the system and to maintai n system variables and derived variables within their permissible limi ts is established. A further objective has been to assess the robustne ss and computational speed of the program. Five different objective fu nctions have been tested, with the aim of investigating the impact on both generation fuel cost and security when different security measure s are introduced alongside cost minimisation. These security measures are maximisation of reactive reserve margins, maximisation of load vol tages, avoidance of voltage collapse, and improving the ability of the system to maintain higher system load. The overall objective function is a weighted combination of these various objectives.