As more grid-connected photovoltaic (PV) inverters become compliant with evolving interconnections requirements, there is increased interest from utilities in understanding how to best deploy advanced grid-support fun...
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ISBN:
(纸本)9781538628904
As more grid-connected photovoltaic (PV) inverters become compliant with evolving interconnections requirements, there is increased interest from utilities in understanding how to best deploy advanced grid-supportfunctions (GSF) in the field. One efficient and cost-effective method to examine such deployment options is to leverage power hardware-in-the-loop (PHIL) testing methods, which combine the fidelity of hardware tests with the flexibility of computer simulation. This paper summarizes a study wherein two Hawaiian Electric feeder models were converted to real-time models using an OPAL-RT real-time digital testing platform, and integrated with models of GSF capable PV inverters based on characterization test data. The integrated model was subsequently used in PHIL testing to evaluate the effects of different fixed power factor and volt-watt control settings on voltage regulation of the selected feeders using physical inverters. Selected results are presented in this paper, and complete results of this study were provided as inputs for field deployment and technical interconnection requirements for grid-connected PV inverters on the Hawaiian Islands.
The main objective of this dissertation is to develop a generalized simulation and modeling framework for extracting dynamics of power electronic converters (PECs) with grid support functions (GSFs) and validate model...
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The main objective of this dissertation is to develop a generalized simulation and modeling framework for extracting dynamics of power electronic converters (PECs) with grid support functions (GSFs) and validate model accuracy through experimental comparison with physical measurements. The dynamic models obtained from this modeling framework aim to facilitate accurate dynamic analysis of a highly integrated power system comprising inverter-based resources (IBRs), specifically for stability assessment. These dynamic models helped in reducing simulation time and computational complexity, thereby enhancing efficiency. Moreover, it provides valuable insights for utilities and grid operators involved in effective system planning, operation, and *** dynamics of the current power grid are poised to undergo substantial changes due to the replacement of traditional generators and the integration of distributed energy resources (DERs) based on PECs equipped with advanced GSFs. The utilization of these smart PECs is expected to increase in the future, primarily because they conform to the voltage and frequency support requirements outlined in the Institute of Electrical and Electronics Engineers (IEEE) 1547-2018 standard. However, the dynamic behavior of PECs, particularly when providing various ancillary services, is attributed to the adoption of modern control algorithms. Consequently, the system exhibits more stochastic and nonlinear dynamics, posing significant challenges to power system stability and control. Accurate modeling of these underlying nonlinear dynamics is required to ensure the stability and reliability of converter-dominated power system (CDPS). However, the proprietary nature and unknown parameters of the PECs control systems, coupled with the increasing system size, using a traditional modeling approach to obtain full dynamics becomes increasingly challenging and computationally expensive. Therefore, new modeling techniques are needed to accuratel
The combination of Photovoltaic (PV) with a hydrogen storage system as backup (HPVHS - Hybrid PV Hydrogen System) has been proposed in this paper. The Proposed system will cope up with the problems of grid connected P...
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ISBN:
(纸本)9781509041695
The combination of Photovoltaic (PV) with a hydrogen storage system as backup (HPVHS - Hybrid PV Hydrogen System) has been proposed in this paper. The Proposed system will cope up with the problems of grid connected PV System (GPVS) which is being stochastic in nature. The control strategy has been proposed for direct and indirect grid voltage regulation utilizing proposed HPVHS as static synchronous compensator (STATCOM). It has been shown that the HPVHS based on this control strategy would improve the dynamic behavior of the GPVS response to disturbance, voltage dips and in a day ahead market where decisions on the power supply should be taken at least 24 hours in advance. MATLAB/SIMULINK based simulation is done and results are provided to show the effectiveness of the proposed control strategy.
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