Analiza regulacije napetosti v distribucijskem omrežju s pomočjo stohastičnega modeliranja

Zupančič, Jernej (avtor), Blažič, Boštjan (mentor)

V pričujočem delu je preučen vpliv implementacije razpršenih virov električne energije v nizkonapetostnih omrežjih. Obnovljivi viri električne energije prestavljajo problem zaradi vpliva na nivo in simetrijo napetosti omrežja, ki ni bilo zasnovano za decentralizirano proizvodnjo ampak za tradicionalen pretok električne energije iz konvencionalnih elektrarn preko prenosnega omrežja do končnih uporabnikov. Za potrebe dela je bil uporabljen realen model evropskega nizkonapetostnega omrežja predmestnega območja. Podatki o proizvodnji virov in porabi bremen so prirejeni za potrebe podanega omrežja na podlagi realnih podatkov. Prvi del magistrskega dela predstavlja pristop k problemu in uporabljena programska orodja. Z simulacijami različnih stopenj implementacije razpršenih virov se določi verjetnost nastopa napetosti, ki niso v skladu z obratovalnimi navodili. Verjetnost se določi s pomočjo Monte Carlo metode, ki nam z večkratnimi izračuni stanj v sistemu določi stopnjo prisotnosti napetostnih kršitev. Metoda je bila izbrana zaradi večjega števila simulacij za posamezno stopnjo, s pomočjo katerih se preveri vpliv virov za različna mesta priključitve. Programsko orodje, ki je bilo izbrano za analizo, je bilo sestavljeno iz programov MATLAB in OpenDSS. Opis dela z omenjenima programoma prikazuje način definiranja poljubnega omrežja v programih in nadaljnjo iteracijo z njim. Podani so tudi uporabljeni diagrami porabe in proizvodnje, ki so bili uporabljeni v simulacijah. V poglavju z rezultati so predstavljeni dobljeni rezultati simulacij, pripadajoči grafični poteki opazovanih veličin, primerjave med posameznimi parametri simulacij in primerjave rezultatov.

• Jezik: Slovenski jezik
• Ključne besede: Razpršeni viri, napetostne razmere NN omrežja, Monte Carlo metoda, Matlab, OpenDSS.
• Vrsta gradiva: Magistrsko delo/naloga
• Organizacija: FE - Fakulteta za elektrotehniko
• Leto izida: 2015
• PID: 20.500.12556/RUL-72392
• Datum objave v RUL: 15.09.2015

Sekundarni jezik

• Jezik: Angleški jezik
• Naslov: Analysis of distribution-network voltage control with stochastic modelling

Izvleček

Increase of renewable energy sources in distribution networks brings forward their impact on voltage levels and symmetry. They are being implemented in network, which was not designed for decentralized energy production, instead it was used for classic network scheme where energy is delivered through transmission network from supply to demand in distribution networks. For this study actual model of european urban low voltage network topology was used. Measured data for production and consumption was scaled to reach given information about maximal and minimal consumption of the network. First part presents methods which were used to solve the problem and programs that were used. In simulations installed power of energy sources was increased, and with calculation of power flows voltage levels were acquired. With statistical approach of Monte Carlo method the probability curve of voltage violations in network was defined. This method was chosen because it allows multiple simulations which were necessary to research the impact of energy i placed in different locations in network. MATLAB and OpenDSS, which were used to perform analysis are also described. Definitions of network elements are given and interaction between them. Load profiles and production data is also shown. Second part, analysis, consists of simulation results with visual presentation of parameters and comparison of impact on results for different simulation parameters.

• Ključne besede: Distributed energy sources, voltage levels in distribution network, Monte Carlo method, MATLAB, OpenDSS.