An unbalanced distribution network power flow calculation considering distributed power supply access

Abstract

The invention discloses an unbalanced distribution network power flow calculation considering distributed power supply access, which includes the steps: step 1, obtaining the a-phase injection current(img file = 'DDA0001844054350000012. TIF' wi= '83' he= '63'/) in a three-phase system, 2, obtainingthe b-phase injection current (img file= 'DDA000184405435000011. TIF' wi= '83' he= '63'/) in a three-phase system, 3, obtaining a c-phase injection current (img file = 'DDA000184405435000013. TIF' wi= '83' he= '63'/) in a three-phase system, 4, obtaining a node current equation according to a node voltage equation of a circuit, and calculating a node injection current; 5, substituting that node current equation into the power equation; Step 6, expanding the equation obtained in step 5, and finally obtaining the power flow calculation composed of the active and reactive power equations of the node injection power equation; the method can help to determine the distribution of voltage and powerflow in three-phase unbalanced power system, and provide the basis for the steady-state analysis of the system.

Description

technical field [0001] The invention belongs to the distributed power access technology, in particular to a power flow calculation of an unbalanced distribution network considering the distributed power access. Background technique [0002] Nowadays, distributed power sources are increasing and connected to the distribution network to participate in operation. Under the general trend of future technology development, the capacity of distributed power sources in the grid system will also increase year by year. Therefore, research on distributed power sources The power flow distribution of distribution network has important realistic and urgent significance. [0003] In the prior art, the dual-decoupling three-phase fast power flow algorithm of the distribution network based on the phase-to-phase decoupling compensation model, the algorithm reduces the dimensionality of the Jacobian matrix through phase-to-phase decoupling, which simplifies the complexity of calculation and is...

AI Technical Summary

Problems solved by technology

[0006] In the existing technology, the structural characteristics of the distribution network are used to establish the relationship matrix between the node voltage and the injected current to realize the direct calculation of the power flow of the distribution network. The process is simple, but the scope of application of the direct algorithm is relatively limited.

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