The Role of PHEV/BEV in Outage/Asset and Demand Side Management

Transcription

1 The Role of PHEV/BEV in Outage/Asset and Demand Side Management Dr. Mladen Kezunovic Student: Qin Yan, Bei Zhang Texas A&M University EPCC, June 3-5, 2013 Bedford, PA Texas A&M University The University of Texas at Austin EV-TEC: Electric Vehicles: Transportation and Electricity Convergence

2 Goals Understanding impacts of PHEVs/BEVs on utility distribution system under variety of circumstances; Helping utility companies improve power grid reliability, security and safety. Framing the problem in temporal and spatial (dynamic) terms 2

3 TASKS Investigate the potential impacts of PHEVs/BEVs on utility distribution system in different areas: Assets management; Demand side management; Outage management, etc. Investigate various implementation options and study feasibility scenarios that impact power grid depending on: Adoption rates of electric vehicles; Charging methods and time-of-charge; Driver s charging inclination, etc. Studying impacts of charging vehicles from renewable energy source: Wind power; Solar power, etc. 3

4 Technical Details Asset Management G2V V2B Demand Side Management G2V V2B Outage Management G2V V2B Development of various implementation options and feasible EV scenarios depending on adoption rates of electric vehicles, timeof-charge, driver s inclination, etc. Actual Driving Cycles SoC Simulation EV Charging Scenarios Effect of possible EV penetration on the existing distribution transformer lifespan is demonstrated. The modeling and simulation under different scenarios are developed. Utilization of the energy stored in the battery of EVs to support the local load during severe system loading and managing the charging of the connected EVs during the low load valley of the day is demonstrated. The impact of PHEVs/BEVs charging/ discharging on outage management in distribution systems is investigated. 4

5 Results: Asset Management The impact of EVs in V2B operation mode on the distribution transformer in the residential level is investigated by simulating the effected transformer thermal factors. Charging at midnight will help considerably alleviate the impact. Load with EV charging at 1 am - Scenario 1 Winter (Jan.1st) Spring (Mar.1st) Summer (Aug.18th) Fall (Nov.1st) Figure 1. Example of Load profile with EV discharging in V2B mode Charging at 1:00 am Month Original Scenario 1 Scenario 2 Scenario3 Scenario 4 Base 7 EVs 14 EVs 7 EVs 14 EVs Load Optimal V2B Optimal V2B 20% SoC 20% SoC Jan FEQ_ Feb FEQ_ Mar FEQ_3 1.87E e Apr FEQ_4 5.62E May FEQ_ Jun FEQ_ Jul FEQ_ Aug FEQ_ Sep FEQ_ Oct FEQ_ E e Nov FEQ_ E e Dec FEQ_ E Year FEQA Year LOL

6 Results: Demand Side Management Demonstration of utilizing PHEV/BEV batteries as energy storage in G2V and V2B operation mode; Peak-load shaving & Peak-load shifting Optimized method to avoid elevating the daily peak load while realizing peak load shifting function of DSM Average daily building load profile Average daily building load profile Average daily building load profile Building Daily Electrical Power (kw) With DSM Peak-Load Shaving Base Load Building Daily Electrical Power (kw) With DSM Peak-Load Shifting Base Load Building Daily Electrical Power (kw) With DSM Peak-Load Shifting Base Load

7 Results: Outage Management The restoration strategy by optimally scheduling PHEV/BEVs under outage condition where the normal utility generations are disconnected is investigated. In our case studies, the entire load in the blackout area can be covered by the stored energy in the PHEV/BEV battery, thus guarantees the minimal interruption of the power service to the customers. Table 2. Simulation results for case study 1 Date & Time Ph-1 (kw) Node 729 Node 731 Node 741 Ph-2 Ph-3 Ph-1 Ph-2 Ph-3 (kw) (kw) (kw) (kw) (kw) Ph-1 Ph-2 (kw) (kw) Ph-3 (kw) Cost of scheduling Power Loss (Before) (MW) Power Loss (After) (MW) Spring Summer Fall Winter

8 NSF CORBI Project Mladen Kezunovic Texas A&M University Sakis Meliopoulos Georgia Institute of Technology Ross Baldick University of Texas at Austin EPCC, June 3-5, 2013 Bedford, PA Texas A&M University The University of Texas at Austin EV-TEC: Electric Vehicles: Transportation and Electricity Convergence

9 Tasks A survey on intra-network communications and communication with consumers of various EVSE from different vendors; Functional specification of a communication center that Integrates EVSE provided by different vendors; Study the EVSE s communication configuration options and applications realized in practice 9

10 Initial results Many vendors of Electrical Vehicle Supply Equipment (EVSE) are offering products that are compatible only with their own communication infrastructure. Table 1. Summary of Some EVSE Equipment and Communication Options Vendor Product Communication option Blink WE-30C/K,WE-48C/K Wireless IEEE g, cellular, LAN/Ethernet, and LAN capable, Internet PEP Station PS2000,PS1500, PM2000, TCP/IP, IPv4/IPv6, DHCP Addressing, WM2000 HTTPS/SSL, Ethernet cable (Coulomb Technologies) ChargePoint Networked Charging Stations Aerovironment EV-Charge America Shorepower Technologies Delta Eaton CT500, CT2000, CT2020 EVSE-RS, EVSE-RS Plugin, EVSE-RS +, EV50, MODEL 1 EVSE, EV 30, EV2001,EV2002, EV2003, EV2101,EV2102, EV2103, EV2104,EV2201, EV2202, EV2203 SC2-120, WU or xx, 36xx, 48xx, 72xx Pow-R-Station- 30A Style, Pow-R-Station - 70A Style 2.4 GHz dynamic network, Commercial GPRS or CDMA cellular data network Wireless IEEE g, 3G/4G cellular, Ethernet, WiFi, Zigbee, cellular communication Wireless, Ethernet connectivity Wireless, cellular, Ethernet communication Ethernet, wireless (option) Standard Ethernet, Serial (RS-232), ModBus (RS485/4-wire), Wi-Fi, Cellular (optional) 10

11 Completed Tasks Define a communication center that works to realize the communication among charging stations provided by different vendors; 11

12 Expected Deliverables 2014 A report describing the testbed for communication and information management system for fleet owners Design specification of the communication center (CC) that integrates charging stations from different vendors Development of a few apps that will take advantage of the integrated information 12

13 Questions 16