Three-phase power flow calculation method for distributed generation and distribution network considering phase sequence hybrid method

Abstract

The invention discloses a distributed generation power distribution network three-phase load flow calculation method taking a phase sequence mixing method into consideration. The distributed generation power distribution network three-phase load flow calculation method comprises the following steps that firstly, a power distribution network three-phase load model, a network phase sequence parameter model and a distributed power supply access model are built based on the phase sequence mixing method, an effective three-phase unbalance power distribution power network improved load flow calculation method is disclosed in a power distribution sequence network, and a sequence component method is fully utilized to process the advantages that a three-phase unbalance system has access to symmetrical distributed generation (DG) and PV nodes; and then PQ, PQ(V), PV and PI node type DG calculation models are deduced in detail and are induced into the discloses load flow calculation method. The distributed generation power distribution network three-phase load flow calculation method taking the phase sequence mixing method into consideration has the advantages of being clear in calculation process, simple to program, quick in calculation speed and good in convergence. Finally, the effectiveness and generality of the distributed generation power distribution network three-phase load flow calculation method are tested and verified through diffset. The distributed generation power distribution network three-phase load flow calculation method has good convergence and strong capacity of processing DG nodes and generating reactive power boundary cross.

Description

technical field [0001] The invention relates to a three-phase power flow calculation method of a distributed power distribution network considering a phase sequence mixing method, and belongs to the technical field of power system analysis and calculation. Background technique [0002] With the continuous development of distributed generation technology, more and more new energy sources are connected to the distribution network as distributed generation (DG), which has brought huge impacts on the network structure, power loss, voltage distribution and power flow calculation of the distribution network. Impact. First of all, the distribution network has changed from a traditional single power supply system to a multi-power supply system, and the flow direction of the power flow has changed from unidirectional to non-directional. Secondly, the traditional distribution network generally only contains two types of nodes: Vθ nodes (balanced nodes) and PQ nodes; and as various di...

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Problems solved by technology

[0003] Purpose of the invention: The present invention proposes a three-phase power flow of distributed generation and distribution network considering the phase sequence mixing method in view of the fact that the existing three-phase power flow calculation method of distribution network cannot be applied to the three-phase power flow calculation of distributed generation and distribution network calculation method

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