Analysis and visualization method for understanding the voltage effect of distributed energy resources on the electric power system

Abstract

a b s t r a c tWhile adding distributed energy resources (DER) to a distribution circuit will affect numerous aspects of operation, bus voltage is a critical aspect that must be maintained within acceptable limits. It is therefore critical to: (1) quantify how DER installation will affect the voltage, (2) visualize the voltage change, and (3) predict the voltage change of the alternatives within the DER operational space. These three goals are achieved through the development of a simple voltage change potential (VCP) visualization method that can be determined using the basic characteristics of an inverter-based DER installation. The VCP results compare favorably with equivalent complete non-linear Matlab/Simulink TM models of DER implementation in distribution circuits at a fraction of the computational time. Calculation of VCP also enables a new control method that uses circuit information and simple equations to provide situationdependent and optimal voltage regulation.

A criticality criterion to decrease the computational burden in multistage distribution system optimal power flow

“…We base our reasoning on the concept of Voltage Change Potential introduced in [12] and aimed at evaluating the local voltage variations caused by the connection of a given distributed energy resource. It is based on a linearization of the network equations, under the assumption that the actual voltage change is small compared to the pre-existing voltage, and is defined as follows:…”

Distributed Energy Resources Electric Profile Identification in Low Voltage Networks Using Supervised Machine Learning Techniques

“…The electrification of transport and heating sectors have brought unprecedented changes modifying the dynamics of the electrical network. Particularly, electrical characteristics of low voltage (LV) distribution networks are increasingly varying due to a rapid integration of distributed energy resources (DER), forcing distribution network operators (DNO) to manage old electrical infrastructure near and beyond their operational limits [2].…”

Impact of Rooftop Photovoltaics on the Distribution System

“…Different aspects of PV impact on the distribution grid.Power fluctuations due to variability in solar irradiance[11, 19, 61, 64, 67, 71-74, 86, 89, 96, 122, 123, 129, 131, 145, 146, 149, 174, 176, 178, 188, 198, 200, 208, 214, 216, 224, 226, 229, 232, 233, 235, 240-243] Overvoltage caused by PVs[68,93,104,113,139,157,158,197,201,237,[244][245][246][247][248][249][250][251] Effect of rooftop PV on the transmission grid[12, 109, 128, 135, 145, 216-219, 221, 228] Comparing the performance of PV in voltage correction to voltage regulators (VRs) or capacitor banks…”