计及经济-可靠性的主动配电网移相变压器协同规划OA

With the in-depth construction of the new power system,user demand for supply reliability is continuously increasing.The single-core asymmetric phase-shifting transformer(SAPST)provides a key technology for the uninterrupted power transfer of loads.However,the planning with phase-shifting transformers often ignores the threat posed by the inrush current of the loop-closing operation to system reliability.To address this issue,a collaborative planning method for SAPST in active distribution networks considering economy and reliability is proposed.Firstly,an equivalent model of SAPST is established,and a partitioned fault restoration strategy is introduced to improve power supply continuity.Secondly,loop-closing current constraints are incorporated into the reliability evaluation framework,and improved indices considering loop-closing current penalty are put forward,enabling the evaluation results to better reflect actual operation risks.On this basis,a bi-level optimization model is constructed,in which the upper layer aims to minimize the investment cost and the lower layer targets the minimization of operation cost and reliability cost.The second-order cone programming algorithm is adopted to solve the model.Case analysis based on the modified IEEE 33-bus system shows that the proposed method can significantly suppress loop-closing current and enhance power supply reliability while ensuring economy,which verifies the feasibility and effectiveness of the method in realizing the collaborative optimization of active distribution networks.