抄録
A real-time power system simulator becomes an indispensable tool in the power system engineering for testing newly developed devices and controllers. The conventional digital simulator has the following disadvantages,
_??_The real-time simulator requires a special hardware for parallel processing. This makes the simulator very expensive.
_??_Many real-time simulators are based on the similar algorithm to EMTP (Electro-Magnetic Transients Program). The algorithm is not easy to implement on the parallel processors.
_??_The implementation and modification of the newly developed devices and controllers are not so easy for the end users.
These are the reasons why the conventional real-time digital simulators for power systems are not utilized widely in the universities and power industries.
The present paper proposes a new scheme of low cost and flexible power system real-time simulator. The proposed real-time simulator has the following features,
_??_The simulation model is constructed by the blockdiagram representation. The model is converted to executable code automatically by widely used CAD software.
_??_In order to speed up the computation and make it easy to model the power apparatus by the blockdiagram representation, Euler's method is utilized as well as some approximations. In addition, insertion of the interface delay is proposed for improving the efficiency of the parallel processing. This allows a low cost and flexible configuration of the power system simulator.
The present paper describes results of the feasibility study on the proposed low cost real-time simulator. It makes it clear through the eigenvalue analysis that the real-time simulation can be conducted with enough accuracy by the proposed scheme. In addition, the validity of the proposed real-time simulator is demonstrated through the comparison with EMTP. The obtained results indicate that the proposed scheme enables the development of a low cost and flexible real-time simulator.
