Font Size: a A A

Design Of Distributed Energy Resources Integration For Active Demand Power Delivery As A Microgrid System

Posted on:2020-01-30Degree:DoctorType:Dissertation
Country:ChinaCandidate:EMMANUEL KOBINA PAYNEFull Text:PDF
Abstract/Summary:PDF Full Text Request
The challenges of Distributed Energy Resources(DERs)integration pose as constraints for distributed power delivery in the emerging renewable power generations.The constraints are generally classified as generation intermittency,network impediments and load variabilities.These cause deficiencies in operational dynamics when the distributed grid is deployed fully.The study resolves to address the challenges through adequacy and efficiency with renewable distributed generations(RDGs).The sustainability of DERs integration as a resilient distribution network depends on adequate renewable energy resources for power generation,thus requires scheme of techniques to guarantee consistent reliable operations for generated power devoid of environmental pollutions,and resilient integrated control characteristics to regulate the grid performance.In addressing the generation intermittent challenges,a hybrid distributed generations scheme is envisaged.Where,Organic Rankine Cycle(ORC)generation is proposed as a baseload power to guarantee grid power performance reliability and stability.The solar PV power is also earmarked for peaking load regime,whiles Flywheel energy storage is utilized for frequency and voltage regulation supports for the DERs integrated grid operations.For the ORC power generation,solar thermal provides heat source with the provision of thermal storage as heat source deficiencies support having biomass combustion scheme reserved for contingency purpose.For this reason,the study proposes an innovative inclusion of adiabatic cooling system as a secondary cooling contingent to warrant constant temperature for working fluid condensation process against temperature degradations in the ORC generation.The functions of adiabatic cooling system derive its communication coordination links and control solutions through proposed ZigBee/GSM wireless sensor network design model.The study also adapts hierarchical control scheme strategy to resolve the network impediments.This incorporates distributed control schemes and techniques with power electronics inverters.The design development applies direct coupling and voltage sourced inverters(VSI)as the interface for point of common coupling to the six(6)bus configuration scheme of the DER grid.The six(6)-bus configuration power distribution network is designed with three-generation buses and three load bus assignments having power delivery profile arrangement clearly defined.Again,the control strategy involves the grid-side converter control scheme with flywheel energy storage functions.The configuration scheme offers improvement to the power integration and control process,hence enhancing prompt response in frequency and voltage regulations for efficiency.For prompt performance response of the hierarchical control scheme,a proposal for control strategy modification of voltage control voltage sourced inverter(VSI)for feedforward control techniques is made in the distributed grid point of common coupling interconnections as a restoration function.Remedial solution for load variabilities is thus,proposed through the Demand-side management(DSM)strategy,where energy efficiency strategy program is opted to enhance power supply and demand load profiles.This seeks to strengthen the efficiency of distributed grid operations with intelligence communication link support and flywheel energy storage system.Thus it improves the power delivery services to the customer without impacting negatively on the load consumption profiles and also sustaining the distributed grid performance.The control and functional scheme of this proposed solution relies on the design model of ZigBee/GSM WSNs communication link.This interconnects and coordinate signal of multi-objective scheme functions application of tele-protection monitoring and controlling of the DSM load bus feeders.It functional scheme includes the Intelligent Electronics Device(IED)functions for regulations of frequency and voltage to improve on the power delivery service to customers in order not to impact on the load consumption profiles.The ZigBee/GSM WSNs application uses algorithm functions to execute it operations.The innovative design model of ZigBee/GSM wireless sensor network(WSNs)communication link offers real-time monitoring indications and control solutions to improve on the grid data acquisition and regulation performance.In all of the proposed solutions development,the study applies model designs and simulations for replication and verification of analytical results of configurations,thus lending to the major tenets of scientific research.These feed the heuristic components of the research in the technological field of applications in general.Given these concerns,all necessary basics of scientific research have been applied in the study as well providing relatively novel design concepts which will lead to future research directions from other researchers where necessary.
Keywords/Search Tags:Distributed energy resources, Control strategies, Integration, Microgrid, Power system, Renewable energy
PDF Full Text Request
Related items