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Energies 2017, 10(8), 1104; https://doi.org/10.3390/en10081104

Assessment of Credible Capacity for Intermittent Distributed Energy Resources in Active Distribution Network

1
,
1,* , 1
and
2
1
Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education, Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2
Electric Power Research Institute of Guangdong Power Grid Corporation, Guangzhou 510080, China
*
Author to whom correspondence should be addressed.
Academic Editor: Pierluigi Siano
Received: 26 April 2017 / Revised: 29 June 2017 / Accepted: 24 July 2017 / Published: 27 July 2017
(This article belongs to the Special Issue Innovative Methods for Smart Grids Planning and Management)
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Abstract

The irregularity and randomness of distributed energy sources’ (DERs) output power characteristic usually brings difficulties for grid analysis. In order to reliably and deterministically evaluate intermittent distributed generation’s active power output, a credible capacity index for active distribution network (ADN) is proposed. According to the definition, it is a certain interval that the stochastic active power output of DERs may fall in with larger probability in all kinds of possible dynamic and time varying operation scenarios. Based on the description and analysis on the time varying scenarios, multiple scenarios considered dynamic power flow method for and are proposed. The method to calculate and evaluate credible capacity based on dynamic power flow (DPF) result is illustrated. A study case of an active distribution network with DERs integrated and containing 32 nodes is selected; multiple operation scenarios with various fractal dimension are established and used. Results of calculated credible capacity based on several groups of scenarios have been analyzed, giving the variance analysis of groups of credible capacity values. A deterministic value with the maximum occurrence probability representing credible capacity is given. Based on the same network case, an application of credible capacity to grid extension planning is given, which contributes to expenditure and cost reduction. The effectiveness and significance of the proposed credible capacity and solution method have been demonstrated and verified. View Full-Text
Keywords: credible capacity; intermittent distributed energy resource; active distribution network; dynamic power flow; multiple scenarios credible capacity; intermittent distributed energy resource; active distribution network; dynamic power flow; multiple scenarios
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Sun, C.; Liu, D.; Wang, Y.; You, Y. Assessment of Credible Capacity for Intermittent Distributed Energy Resources in Active Distribution Network. Energies 2017, 10, 1104.

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