I have listed the publication here. I will update as i can find time to update. I categorized them as Journal paper, conference paper and technical notes.
Abstract: In recent years, automotive manufactures have introduced plug-in electric vehicles (PEV) into the automotive market. This market is expected to expand rapidly in the near future. Depending on the charging rates and charging times of PEVs, distribution networks can face significant stress. In this paper, distributed energy storage (DES) systems are proposed to improve the flexibility of residential distribution networks to support PEV adoption. Operating these DES systems optimally not only facilities PEV adoption but also reduces operating costs by taking advantage of the real-time energy market to profit from charging and discharging the DES units. This paper presents a Discrete Ascent Optimal Programming algorithm for optimizing energy market participation.
Abstract: Smart realization involves a steady increase in inverter-based components like Distributed Energy Resources (DER), energy storage systems, and plug-in electric vehicles. The harmonics related to DER inverters and the spread of power electronic devices raises concerns for utilities and customers. Harmonics can create component failures, thermal losses and control system malfunctions. In this paper the authors analyze the impact of multi-source harmonics from DERs inside distribution networks. The harmonics impacts are evaluated by harmonic measurement indices. Harmonic emission in a real distribution circuit is simulated with the help of power flow analysis. The results are presented with visualization techniques to give a better picture of harmonic propagation vs. different levels of harmonic source magnitude and angle. Due to effect of harmonic on network efficiency, a sensitivity analysis considering power factors is conducted.
Abstract: A coordinating, model-centric control strategy for mitigating voltage rise problems due to photovoltaic (PV) penetration into power distribution circuits is presented. The coordinating control objective is to maintain an optimum circuit voltage distribution and voltage schedule, where the optimum circuit operation is determined without PV generation on the circuit. In determining the optimum circuit voltage distribution and voltage schedule, the control strategy schedules utility controls, such as switched capacitor banks and voltage regulators, separate from PV inverter controls. Optimization addresses minimizing circuit losses and motion of utility controls. The coordinating control action provides control set-points to the PV inverters that are a function of the circuit loading or time-of-day and also the location of the PV inverter. Three PV penetration scenarios are considered, 10%, 20%, and 30%. Baselines with and without coordinating controls for circuit performance without PV generation are established, and these baselines are compared against the three PV penetration scenarios with and without coordinating control. Simulation results are compared and differences in voltage variations and circuit losses are considered along with differences in utility control motion. Results show that the coordinating control can solve the voltage rise problem while minimizing circuit losses and reducing utility control motion. The coordinating control will work with existing PV inverter controls that accept control setpoints without having to modify the inverter controls.
Abstract: There can be significant benefits to utilities for implementing automated and controllable devices. However, due to both the cost of smart devices and the cost of implementing the required monitoring, communication, and control, it is often not cost effective to update all devices on the system at once. This article presents an economic evaluation of a model-based distribution control scheme that is independent of circuit topology and integrates legacy and modern control equipment. Distributed engineering workstation simulation results show cost saving to both the customers and utility due to reduction of demand and losses. These cost savings provide the basis for assessing which feeders should be upgraded with smart devices.
This paper considers system effects due to the addition of Plug-in Hybrid Vehicles (PHEV) and Distributed
Energy Resource (DER) generation. The DER and PHEV are considered with energy storage technology
applied to the residential distribution system load. Two future year scenarios are considered, 2020 and
2030. The models used are of real distribution circuits located near Detroit, Michigan, and every customer
load on the circuit and type of customer are modeled. Monte Carlo simulations are used to randomly
select customers that receive PHEV, DER, and/or storage systems. The Monte Carlo simulations provide
not only the expected average result, but also its uncertainty. The adoption scenarios are investigated
for both summer and winter loading conditions.
The harmonics generated by DER devices can cause distortion in power system voltages and currents.In addition to the power quality issues, loss, and component failures harmonics can have an economicimpact on distribution networks. In this paper the authors analyze harmonics produced from multiplesources such as solar, wind and energy storage systems. The aim is simulating harmonic interactions thatcan lead to concern in distribution networks. Accordingly, a new index for harmonic analysis is proposedto simultaneously consider magnitude and angle of waveform. The effect of generated harmonics fromDER is evaluated quantitatively on distribution circuits with the help of data visualization approaches.Harmonic propagation is simulated in a detailed distribution network model to analyze how circuit topol-ogy varies harmonics effects. Due to the interaction of different harmonic sources, the sensitivity analysisis conducted to show the impact of each harmonic source magnitude and angle on the overall distribu-tion network total harmonic distortion. Phase balancing impact on harmonic distortion in distribution networks is also considered.