並列バンクに関する制約を考慮した最適潮流計算

抄録

This paper proposes parallel connected transformers operation constrained optimal power flow. Usually, taps of parallel connected transformers are adjusted to be the same ratio to reduce transformers' load losses. Moreover, shunt capacitors and shunt reactors connected with parallel connected transformers are not used at the same time. It's supposed that increase of constraint on optimal power flow causes computing probrem, for example increasing time for computing, so the constraint about parallel connected transformers are not considered in the conventional optimal power flow. When an objective function much related to reactive power compensation is applied to the conventional optimal power flow, we can get a suitable solution for power system operation. However when an objective function not related to reactive power compensation is applied to the conventional optimal power flow, we cannot get suitable solution. The proposed method adjusts tap ratio of transformers and phase shifting equipment (power capacitor and shunt reactor) to be suitable for power system operation whatever objective function is applied. In addition, the proposed method can reduce the calcurate time.