Analyzing Impact of Distributed PV Generation on Integrated Transmission & Distribution System Voltage Stability—A Graph Trace Analysis Based Approach

Bilal Ahmad Bhatti, Robert Broadwater and Murat Dilek
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Bilal Ahmad Bhatti: Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA 24061, USA
Robert Broadwater: National Information Solutions Cooperative, Blacksburg, VA 24060, USA
Murat Dilek: National Information Solutions Cooperative, Blacksburg, VA 24060, USA

Energies, 2020, vol. 13, issue 17, 1-15

Abstract: The use of a Graph Trace Analysis (GTA)-based power flow for analyzing the voltage stability of integrated Transmission and Distribution (T&D) networks is discussed in the context of distributed Photovoltaic (PV) generation. The voltage stability of lines and the load carrying capability of buses is analyzed at various PV penetration levels. It is shown that as the PV generation levels increase, an increase in the steady state voltage stability of the system is observed. Moreover, within certain regions of stability margin changes, changes in voltage stability margins of transmission lines are shown to be linearly related to changes in the loading of the lines. Two case studies are presented, where one case study involves a model with eight voltage levels and 784,000 nodes. In one case study, a voltage-stability heat map is used to demonstrate the identification of weak lines and buses.

Keywords: graph trace analysis; power system stability; power system computing; integrated system model; power transmission and distribution (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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