相座標同期機モデルによる電力系統過渡解析の数値安定性の向上

抄録

The present paper proposes the use of phase-domain (abc frame) generator model in the electro-magnetic transient analysis instead of conventional dqO-domain generator model in order to improve numerical stability.
The drawback of the conventional dqo-domain machine model is that the prediction of a number of eletrical variables as well as machine speed is needed in order to interface the circuit of a machine model with the rest of the power system network and the prediction of these variables leads to numerical instability. In contrast, the prediction of electrical variables is not needed in the proposed phase-domain model.
In the paper, the phase-domain machine model is developed. The proposed model is validated by comparisons with an existing EMTP type-59 machine model. The paper makes it clear that the numerically stable solutions are obtained by using the proposed model even in the cases where numerical instabilities occur when the existing type-59 model is used.