Data-driven Op.misa.on for Energy Management in Smart Grid Using Distributed Energy Resources

Transcription

1 Data-driven Op.misa.on for Energy Management in Smart Grid Using Distributed Energy Resources Research group: Saman Halgamuge, Marnie Shaw, Chathurika Mediwaththe, Rajith Vidanaarachchi College of Engineering and Computer Science Australian National University

2 2 Overview ü Distributed Energy Resources? ü Examples of DERs ü Rapid Growth of DERs ü Electricity Demand-side Management? ü Our Work Project 1 Energy Trading Frameworks for Microgrid Electricity Demand-side Management using DERs Project 2 Data-driven Op.misa.on for Placement of Distributed Energy Resources on the Power Grid

3 3 Distributed Energy Resources (DERs)? Energy sources (power generation or storage units) that are directly connected to the distribution network or connected to the network on the customer side of the meter Can be aggregated to provide energy necessary to meet regular electricity demand Size can vary from around 1 kw up to tens of megawatts (MW)

4 Examples of DERs v RooNop/ commercial solar photovoltaic (PV) panels v Energy storage v Wind power v Electric vehicles v Combus.on engines v Cogenera.on units etc. 4

5 5 Rapid Growth of DERs ü DERs are increasingly becoming important in the power system ü As of July 2017, there are over 1.7 million PV installa.ons in Australia, with a combined capacity of over 6.2 gigaways (Australian PV Ins.tute, 2017) Es.mated Residen.al Solar PV Energy Genera.on Source: Australian Energy Council Analysis 2017

6 6 Electricity Demand-side Management? ü Reducing peak-electricity demand so that electricity u.lity companies can delay building addi.onal genera.on capacity Gas, hydro, combustion turbine (additional spinning reserves) Natural Gas Combined Cycle Coal or Nuclear

7 7 Our Work Data-driven Op.misa.on for Energy Management in Smart Grid Using DERs Project 1 : Energy Trading Frameworks for Microgrid Electricity Demand-side Management using DERs Project 2: Data-driven Op.misa.on for Placement of Distributed Energy Resources on the Power Grid

8 8 Project 1: Energy Trading Frameworks for Microgrid Electricity Demand-side Management using DERs ü Inves.gate effec.ve methods to achieve community electricity demand-side management (e.g. residen.al gated community) using community energy storage devices and household distributed PV power genera.on ü Exploit household distributed PV power genera.on to reduce peak electricity demand of residen.al electricity customers Distribution Transformer (Utility) Neighbouhood Area Network (NAN) AC/DC converter Data Acquisition and control Battery Storage

9 Project 2 : Data-driven Op.misa.on of Placement of Distributed Energy Resources on the Power Grid ü If unplanned, DERs can represent unreliable electricity supply that requires large investments to accommodate them in the larger grid ü Proper planning of placement of DERs has become a major concern for u.lity companies Distribution power network segment with areas having over-voltage problem at noon Source : IEEE Power and Energy Magazine,

10 10 Project 2 : Data-driven Op.misa.on of Placement of Distributed Energy Resources on the Power Grid ü Study and develop tools to iden.fy best choices for loca.ons and energy genera.on capacity for DERs to improve their added value to the power system opera.on ü Tools will be developed to consider, Technical and economical concerns - Voltage and frequency varia.ons - Power flow fluctua.ons - Energy loss - Energy forecasts - Peak demand reduc.on - Genera.on and maintenance costs etc. Valuable Informa.on about power network components and customers - Data ranging from geographic features to socioeconomic sta.s.cs

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12 12 Opportuni.es and Challenges of DERs Opportuni)es: If planned, help u.li.es to accommodate peak energy demand New source of revenue for both customers and energy companies Poten.al to reduce environmental pollu.on Increase the efficiency of the network by reducing energy losses Reduced the need for construc.ng new transmission lines Challenges : If unplanned, DERs can represent unreliable electricity supply (voltage and frequency disrup.ons) that requires large investments to accommodate them in the larger grid Large amounts of intermiyent genera.on can bring about uncertain.es in power genera.on and network behaviour

13 13 Microgrid? Small-scale power grid that can operate independently or in conjunction with the main electricity grid

14 Distribution Network Vs Transmission Network 14

15 15 Project 2 : Data-driven Op.misa.on of Placement of Distributed Energy Resources on the Power Grid ü Power grid is tradi.onally designed such that power flows from sending end (source substa.on) to the load ü Conductor sizes are gradually decreasing from the source substa.on to consumer point ü High genera.on capacity at consumer end leads excessive power flow back to the grid through small-sized conductors and this causes increased losses Grid Losses versus Distributed Genera.on Losses