Coordinated Voltage Control in Active Distribution Network with On-load Tap Changer and Solar PV System Systems
Translated title
Coordinated Voltage Control in Active Distr ibution Network with On-load Tap Changer and Solar PV System Systems
Author
Singh, Praveen Prakash
Term
4. term
Education
Publication year
2019
Submitted on
2019-10-31
Pages
40
Abstract
Declining PV costs and supportive policies are driving high solar penetration in active distribution networks, creating voltage management challenges such as overvoltage and interactions with legacy equipment. This thesis investigates how the reactive power capability of PV inverters, operated with Q-V droop characteristics, can be coordinated with on-load tap changers (OLTCs) to keep feeder voltages within allowable limits. The work reviews the state of the art and relevant grid codes, then builds a steady-state model of a medium-voltage network to study the impact of distributed energy resources. Sensitivity analysis and DER indices are used to identify voltage-critical locations, and representative generation and load profiles are applied. OLTC control and inverter droop control are formulated, and case studies compare uncoordinated operation with a coordinated, distributed control strategy. The study focuses on PV participation in voltage regulation and outlines coordination principles intended to mitigate overvoltage while avoiding adverse controller interactions. Quantitative results and detailed performance conclusions are not included in this excerpt but are presented in the full thesis.
Faldende PV-omkostninger og gunstige politikker øger solcelleandelen i aktive distributionsnet og skaber udfordringer for spændingsstyring, herunder overspændinger og samspil med eksisterende udstyr. Dette speciale undersøger, hvordan PV-inverteres reaktive effektkapacitet, styret med Q-V-droop, kan koordineres med on-load tap changere (OLTC) for at holde spændingen inden for tilladte grænser. Arbejdet gennemgår state-of-the-art og relevante netkoder og opbygger en steady-state model af et mellemspændingsnet for at vurdere påvirkningen fra decentrale energikilder. Følsomhedsanalyse og DER-indekser bruges til at udpege spændingskritiske punkter, og repræsentative produktions- og belastningsprofiler anvendes. OLTC-styring og inverter-droop formuleres, og cases sammenligner ukoordineret drift med en koordineret, distribueret strategi. Studiet fokuserer på PV’s deltagelse i spændingsregulering og skitserer koordineringsprincipper, der skal dæmpe overspændinger og undgå uhensigtsmæssige interaktioner mellem regulatorer. Kvantitative resultater og detaljerede præstationskonklusioner fremgår ikke af dette uddrag, men præsenteres i den fulde afhandling.
[This apstract has been generated with the help of AI directly from the project full text]