&nbsp;Power Flow Algorithm of DC Distribution Network Based on Load Equivalent Conductance Iteration

DENG Shuairong; ZHAO Weifang; RAN Li; WEN An

doi:10.3969/j.issn.1000-7229.2017.04.009

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Electric Power Construction ›› 2017, Vol. 38 ›› Issue (4) : 64. DOI: 10.3969/j.issn.1000-7229.2017.04.009

Power Flow Algorithm of DC Distribution Network Based on Load Equivalent Conductance Iteration

DENG Shuairong1，ZHAO Weifang1，RAN Li1，WEN An2

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Abstract

ABSTRACT： The connection of distributed power generation promotes the development of DC power distribution networks. This paper proposes an iterative algorithm using equivalent load conductance for the power flow calculation of DC distribution network with low power and numerous sources by redefining the node type of DC distribution network . This method can quickly solve the DC distribution network power flow in combination with a node voltage iteration method. This method is used to calculate the common DC distribution network topology of ‘hand-in-hand’, which is proved to be operational and effective. The example calculation results show that the convergence rate of this method is faster in the early period and gradually converges to the true value in the later period. For the system with lower precision requirement of power flow calculation, the results of the first three steps can be used as the power flow value, which can get the ideal calculated value with a faster speed.

Key words

equivalent load conductance / power flow calculation / DC distribution network / node voltage method

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DENG Shuairong, ZHAO Weifang, RAN Li, WEN An. Power Flow Algorithm of DC Distribution Network Based on Load Equivalent Conductance Iteration[J]. Electric Power Construction. 2017, 38(4): 64 https://doi.org/10.3969/j.issn.1000-7229.2017.04.009

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Funding

Project supported by National Key Basic Research Program of China（973 Program）（2012CB215200）; National Key Research and Development Program of China（2016YFB0901801）; Guangdong Leading Talents Introduction Special Funds（SEPRI-K131003）