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Volume 12
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Article

A Mixed Uncertainty Power Flow Algorithm-Based Centralized Photovoltaic (PV) Cluster

by
Hao Wu
1,
Lin Zhou
1,2,*,
Yihao Wan
1,
Qiang Liu
1 and
Siyu Zhou
1
1
School of Electrical Engineering, Chongqing University, Chongqing 400044, China
2
State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China
*
Author to whom correspondence should be addressed.
Energies 2019, 12(20), 4008; https://doi.org/10.3390/en12204008
Submission received: 18 September 2019 / Revised: 17 October 2019 / Accepted: 17 October 2019 / Published: 22 October 2019
(This article belongs to the Section F: Electrical Engineering)
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Abstract

With the large-scale centralized PV clusters connected to grid, the grid power flow has certain randomness. Considering the fluctuation of PV output, an improved Krawczyk-Moore algorithm in a mixed coordinate system is proposed to solve the uncertain power flow problem. Firstly, aiming at the special structure of a centralized PV cluster with only load node and no generator node, this paper proposes a power flow calculation in the mixed power flow coordinate, and then the Krawczyk-Moore operator is used to combine interval and affine arithmetic to overcome the shortcoming of over-conservative interval algorithm. Finally, the voltage operating condition under different volatility and different partial shading conditions is studied through the simulation of a practical example, and the out-of-limit voltage problem inside the centralized PV cluster is analyzed. Meanwhile, the effectiveness of the proposed algorithm is verified.
Keywords: centralized PV cluster; power flow analysis; interval and affine arithmetic; Krawczyk-Moore operator; mixed power flow calculation; out-of-limit voltage; partial shading centralized PV cluster; power flow analysis; interval and affine arithmetic; Krawczyk-Moore operator; mixed power flow calculation; out-of-limit voltage; partial shading

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MDPI and ACS Style

Wu, H.; Zhou, L.; Wan, Y.; Liu, Q.; Zhou, S. A Mixed Uncertainty Power Flow Algorithm-Based Centralized Photovoltaic (PV) Cluster. Energies 2019, 12, 4008. https://doi.org/10.3390/en12204008

AMA Style

Wu H, Zhou L, Wan Y, Liu Q, Zhou S. A Mixed Uncertainty Power Flow Algorithm-Based Centralized Photovoltaic (PV) Cluster. Energies. 2019; 12(20):4008. https://doi.org/10.3390/en12204008

Chicago/Turabian Style

Wu, Hao, Lin Zhou, Yihao Wan, Qiang Liu, and Siyu Zhou. 2019. "A Mixed Uncertainty Power Flow Algorithm-Based Centralized Photovoltaic (PV) Cluster" Energies 12, no. 20: 4008. https://doi.org/10.3390/en12204008

APA Style

Wu, H., Zhou, L., Wan, Y., Liu, Q., & Zhou, S. (2019). A Mixed Uncertainty Power Flow Algorithm-Based Centralized Photovoltaic (PV) Cluster. Energies, 12(20), 4008. https://doi.org/10.3390/en12204008

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