Real-time communication platform for Smart Grid adaptive Volt-VAR Optimization of distribution networks

Manbachi, Moein; Shrivastava, Abhinav; Farhangi, Hassan; Monti, Antonello; Palizban, Ali; Ponci, Ferdinanda; Arzanpour, Siamak

doi:10.1109/sege.2015.7324592

Cited by 13 publications

(5 citation statements)

References 17 publications

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“…Commercially sold VRs are usually designed to make approximately 2 million total number of switching for a typical life span of 20 years. This constitutes a 273 allowable tap steps per day [37,38], which is expressed as a constraint in (2).…”

Section: Proposed Methodologymentioning

confidence: 99%

Smart Inverters Functionalities and their Impacts on Distribution Feeders at High Photovoltaic Penetration: An Overview

Olowu,

Sarwat

2020

Preprint

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The increase in grid-connected photovoltaic (PV) systems has been consistent over the years. Several studies have reported the impacts of this increase on the distribution networks such as reverse power flow, voltage fluctuations, possible increase in system losses amongst others. With this rise in PV penetration level, it becomes necessary for grid tied smart inverters (SI) to be allowed to participate in feeder voltage regulation. Till date, no comprehensive technical review and analysis has been done on the impact and interaction of existing and proposed SI settings on the existing legacy voltage control devices. This paper presents a novel technical review and analysis of some voltage regulation settings of SIs and their impacts on distribution feeders including their interaction with legacy devices such as capacitors, on/off Load Tap Changers, their impact on the feeder losses, harmonic effects and economic impacts (expressed as the device cost factor) and circuit impact index (CII). The analysis of these functionalities is done using the standard IEEE 8500 distribution feeder, integrated with six PVs (based on real PV parameters and data), and strategically located with actual irradiance and temperature profile from a 1.4MW PV plant located at FIU. These PV locations were carefully selected to allow for detailed impacts studies. The results show how the various SI functions impact the reactive power injection and switching of the capacitor banks, the voltage regulator switching, the losses in the feeder, the harmonic and the CII. The Volt-Watt with rise/fall rate-ofchange limiting setting showed the least impact in terms of the CII, voltage regulator tapping and capacitor switching but with high amount of losses compared to other SI functions.

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Section: Proposed Methodologymentioning

confidence: 99%

Smart Inverters Functionalities and their Impacts on Distribution Feeders at High Photovoltaic Penetration: An Overview

Olowu,

Sarwat

2020

Preprint

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“…The life span of VRs and OLTCs are directly impacted by the number of switching operations per day. According to [51, 52], a high‐quality VR is capable of making 2 million mechanical switchings (273 switching operations per day) without the need for maintenance over a 20 year life span.…”

Section: Model Formulationmentioning

confidence: 99%

“…According to [54,55], a high-quality VR is capable of making 2 million mechanical switching (273 switching operations per day) without the need for maintenance over a 20-year life span. Most commercially available OLTCs and VRs typically have a total of 32 steps with a 0.625% change in voltage with each tap step.…”

Section: Voltage Device Operation Analysis At the Feedersmentioning

confidence: 99%

Case study on the effects of partial solar eclipse on distributed PV systems and management areas

Sundararajan¹,

Olowu²,

Wei³

et al. 2019

IET Smart Grid

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Photovoltaic (PV) systems depend on irradiance, ambient temperature and module temperature. A solar eclipse causes significant changes in these parameters, thereby impacting PV generation profile, performance, and power quality of larger grid where they connect to. This paper presents a case study to evaluate the impacts of the solar eclipse of August 21, 2017 on two real-world grid-tied PV systems (1.4MW and 355kW) in Miami and Daytona, Florida, the feeders they are connected to, and the management areas they belong to. Four types of analyses are conducted to obtain a comprehensive picture of the impacts using 1-minute PV generation data, hourly weather data, real feeder parameters, and daily reliability data. These analyses include: individual PV system performance measurement using power performance index; power quality analysis at the point of interconnection; a study on the operation of voltage regulating devices on the feeders during eclipse peak using an IEEE 8500 test case distribution feeder; and reliability study involving a multilayer perceptron framework for forecasting system reliability of the management areas. Results from this study provide a unique insight into how solar eclipses impact the behavior of PV systems and the grid, which would be of concern to electric utilities in future high penetration scenarios.

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“…Each device sends several messages to exchange information including measurements and control signals (Boolean and Float datatype). In extreme cases, with assumption of each device sending an average of 100 messages per second, it can lead to 1000-5000 ms packet delay and up to 10 million messages per second [26]. Due to this issue in the network, centralized operation of MMG, which requires data from all nodes in MMG, could be affected.…”

Section: Network Emulation In the Platformmentioning

confidence: 99%

Internet of Things Platform for Energy Management in Multi-Microgrid System to Improve Neutral Current Compensation

et al. 2018

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In this paper, an Internet of Things (IoT) platform is proposed for Multi-Microgrid (MMG) system to improve unbalance compensation functionality employing three-phase four-leg (3P-4L) voltage source inverters (VSIs). The two level communication system connects the MMG system, implemented in Power System Computer Aided Design (PSCAD), to the cloud server. The local communication level utilizes Modbus Transmission Control Protocol/Internet Protocol (TCP/IP) and Message Queuing Telemetry Transport (MQTT) is used as the protocol for global communication level. A communication operation algorithm is developed to manage the communication operation under various communication failure scenarios. To test the communication system, it is implemented on an experimental testbed to investigate its functionality for MMG neutral current compensation (NCC).To compensate the neutral current in MMG, a dynamic NCC algorithm is proposed, which enables the MGs to further improve the NCC by sharing their data using the IoT platform. The performance of the control and communication system using dynamic NCC is compared with the fixed capacity NCC for unbalance compensation under different communication failure conditions. The impact of the communication system performance on the NCC sharing is the focus of this research. The results show that the proposed system provides better neutral current compensation and phase balancing in case of MMG operation by sharing the data effectively even if the communication system is failing partially.Energies 2018, 11, 3102 2 of 22 control the neutral current directly [3], where the 3P-4L voltage source inverter (VSI) provides better unbalance compensation than other active and passive methods [4]. Traditionally, a fixed portion of the 3P-4L converter capacity is specified to compensate the neutral current. However, the drawback of this method is in case of higher neutral current compensation (NCC) necessity, where it can lead to increased capacity of the 3P-4L compensator [5]. Authors in Reference [6] employed the 3P-4L VSI with PV installation to compensate for the neutral current but case scenarios for network interaction with different loads are not presented. A fixed capacity neutral current compensation method employing 3P-4L VSI under various load scenarios for network contingencies cases is proposed in Reference [7]. Furthermore, the 3P-4L VSI is used to eliminate the leakage current from PV installations [8]. However, none of these researches have considered higher capacity requirement. Authors in Reference [9] propose a dynamic capacity distribution method to compensate for the neutral current utilizing the maximum capacity of the VSI in a Microgrid (MG) but no communication system in presented. Authors in References [10,11] have employed conservative power theory to share the residual neutral current among the VSIs in an MG. Although a communication system have been employed, its operational details are not presented. Cloud-based Internet of Things (IoT) platforms to manage energy of building...

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Real-time communication platform for Smart Grid adaptive Volt-VAR Optimization of distribution networks

Cited by 13 publications

References 17 publications

Smart Inverters Functionalities and their Impacts on Distribution Feeders at High Photovoltaic Penetration: An Overview

Smart Inverters Functionalities and their Impacts on Distribution Feeders at High Photovoltaic Penetration: An Overview

Case study on the effects of partial solar eclipse on distributed PV systems and management areas

Internet of Things Platform for Energy Management in Multi-Microgrid System to Improve Neutral Current Compensation

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