In supervisory information system(SIS) of power plant

it is necessary to realize development of many applied functions

thereby

needing effective data processing methods and optimal algorithms.For this

a scheme has been put forward

in which a system developing platform was constructed by using high-level programming language

and the complex algorithm's functions were realized by using module MATLAB COM.Thus

the system can save development costs and enhance efficiency of the system development.The realization process of calling module MATLAB COM in developing SIS functions has been presented

and a comparison between the accuracy and efficiency of some calculated results with those obtained from self-developed algorithms being carried out

it shows that the result obtained from seeking solution for load distribution problem by using module COM formulated from the secondary plan function in MATLAB is somewhat worse than that obtained by using Langrangian relaxing method.Therefore

for development of an information system needing higher accuracy and efficiency of the algorithm

it is necessary to have designed algorithm with a clear aim

or to adopt scientific calculation software which is more suitable for concrete problems.