Radioactive power distribution network reconstruction method and device with variable number of connected areas

Abstract

The invention discloses a radioactive power distribution network reconstruction method with a variable number of connected areas, and the method comprises the steps: constructing a phase angle minimization sub-optimization problem with a phase angle lower bound, and converting the phase angle minimization sub-optimization problem into a KKT condition; constructing a zero phase angle identificationconstraint, and solving a phase angle minimization sub-optimization problem from a KKT condition to obtain the number of zero phase angles; taking the number of the zero phase angles as the number ofdegrees of freedom of the voltage phase angles of the connected districts, and constructing a power distribution network radioactivity constraint; and embedding or merging the radioactive constraintsof the power distribution network into the optimization model of the power distribution network reconstruction problem to obtain a power distribution network reconstruction optimization model with the radioactive constraints of the power distribution network. According to the method, the defect that the network radioactivity condition cannot be listed before the number of the connected areas is obtained in the prior art can be effectively overcome, and the network radioactivity condition can be embedded into the variable-number distribution network reconstruction optimization problem of the connected areas in an explicit mode. The embodiment of the invention further discloses a radioactive power distribution network reconstruction device with the variable number of connected areas.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a method and device for reconfiguring a radioactive distribution network with a variable number of connected areas. Background technique [0002] The development and utilization of distributed clean energy and the active participation of users in power production and trading are important and clear directions for the development of power systems formed in the past ten years. For this reason, the concept of active distribution network (ADN) came into being, aiming to solve the problem of the distribution side being compatible with large-scale intermittent renewable energy access and the corresponding user side actively participating in the electric energy market. According to the definition of TaskForceC6.11 of the International Conference on Large Power Grids (CIGRE), the active distribution network is a public distribution network with a flexible topology that adopts the m...

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Problems solved by technology

[0009] Embodiments of the present invention provide a method and device for reconfiguring a radioactive distribution network with a variable number of connected areas, which can effectively solve the problem of inaccurate access to the number of connected areas of the radioactive distribution network in the prior art, resulting in poor stability of the radioactive distribution network

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