Toshiba s Smart Grid technologies and solutions for MV/LV grid

Transcription

1 Toshiba s Smart Grid technologies and solutions for MV/LV grid Copyright 2012, Toshiba Corporation Dr. Katsutoshi Toda, Technology Executive Social Infrastructure Systems Company, Toshiba Corporation

2 Threat and hope surrounding our society Environmental Reasons Political Pressure Global warming Aging Infrastructures Consumer Needs Technical Innovation

3 Issues surrounding Renewable Integration PV and WT have characteristics of highly fluctuation due to the high dependence on weather conditions. Large scale deployment of RES to Power Grid Surplus power Overload of lines / Transformers Voltage fluctuation Harmonics cause Reverse flow Overvoltage / Under voltage Frequency fluctuation Unintended islanding

4 Challenge in MV/LV Grid Solar power generation > Consumption by local load Reverse power flow to upstream electric power system Substation for distribution Bank Allowable voltage range LV/MV Bank flow Voltage rise in the grid Upper voltage Lower Loss of solar power generation Load Load Load Load ~ - Load ~ - Load ~ - Reverse flow Voltage rise

5 What is µems?(1/2 ) µems is the advanced energy management system for micro grid that incorporates distributed renewable energy resources Gas Turbine PV Tie-line Bulk Power System μems Micro grid Wind Turbine Load Battery System

6 What is µems? (2/2) µems utilizes advanced smart grid technologies for Renewable Integration µems Core Features (1) Demand and Output Forecast (2) Energy Supply Scheduling (3) Fluctuation smoothing of PV & WT output (4) Real-time Supply and Demand Control (5) Voltage Regulation (6) Demand Response 6

7 Real-time Supply and Demand Control Balance between the power demand (consumption) and supply (generation) for stable power supply Battery Energy Storage Renewable Energy (Variable) Gas turbine, Gas engine, Diesel Thermal Power, CHP, FC, etc Supply Control Control Control High Frequency μems Measure Control Supply-Demand Balancing Scale Control Low Frequency Battery Energy Storage Battery Energy Storage(Variable) Demand (Controllable) Demand (Variable) Demand New facilities Existing system

8 Voltage Regulation µems controls voltage of MV/LV grids with VR, Battery, STATCOM Substation for distribution Load Load Load Load ~ - Load ~ - Load ~ ~ - Bank LV/MV Bank flow VR Battery Voltage rise STATCOM Allowable voltage range Upper voltage Lower Voltage Rise Within Range

9 Comparison of Batteries for Grid Control Capacity High Input / Weight (Energy and Output Density) Lead-Acid Essential requirement for BESS Ni-MH Conventional Lithium-ion Long Life LTO Lithium-ion Life-Cycle Working low Temperature Capacity 500 Low Cycles Temperature Operation Cycle Capacity 1000~1500 Cycles Rapid Cycle Recharging Capacity 2000 Cycles Cycle Capacity 5 ~ 10 ~ 0 ~ -30 ~ 6000 Cycles Cycle Charge / Discharge Performance 0.1C/3C 0.5~1C / 1~2C 1C/1~2C 3C/3C

10 Power Stabilization System Voltage Regulator (SVR/TVR) [Main Function] Voltage control [Benefit] Voltage stability improvement <Characteristics> The response is several hundred milliseconds. Static Compensator (D-STATCOM) [Main Function] Reactive power and Voltage Control [Benefit] Voltage Stability Improvement <Characteristics> Turn-off Characteristics is better than SVC. High efficiency and Size of miniaturization by SiC devices (Internal power losses 1/4 and External dimensions 1/2)

11 The Okinawa Electric Power Company, Inc,. Miyako Island Mega Solar Demonstration Research Facility Construction of the Miyako Island Mega-Solar Demonstration Research Facility for Okinawa Electric Power Company, Inc., Toshiba was the overall EPC* contractor for this project. (*EPC: Engineering Procurement Construction) Objectives of the Project by Okinawa Electric Power Company, Inc. To utilize renewable energy sources such as PV power and Wind power To evaluate the influence on the electricity grid from renewable energy sources To demonstrate the stabilization methods of electricity grid with renewable energy sources by charge and discharge of battery

12 The Okinawa Electric Power Company, Inc,. Miyako Island Mega Solar Demonstration Research Facility To System Karimata area 900kW 2 WT 600kW Existing WT Fukuzato & Bora area To System WT 900kW 2 Existing WT Miyako No.2 Generator Station 40,000kW Miyako Gas Turbine Station 15,000kW Miyako Generator Station 19,000kW Brief Summary Date of Operation: 15 th October 2010 PV generation: 4,000 kw Total Demand : Approx.50MW, Population: Approx.55,000 Miyako Island Mega Solar Demonstration Research Facility PV 4.0MW Battery 4.1MW (total) SOURCE: Press Release by The Okinawa Electric Power Company (released October 15, 2010)

13 Smart Grid Pilot System in ACEA, Italy Efficient use of PV generation for EV charging and stable operation of distribution network by advanced voltage management The result of field test is expected to contribute to the full-scale deployment of RES and EV in Rome. Raffinerie Substation Functions of μems Charge and discharge management of energy storage for efficient use of PV generation TVR operation monitoring EV Charger Power line Information line 8.4kV Power line

14 Smart Grid Pilot system in ACEA, Italy FEATURES MV Voltage Fluctuation Suppression Output Voltage Control Auto Tap Control Voltage Fluctuation Suppression is achieved by selecting autotap control Manual tap Control Allows Operator To Freely Adjust The Output Voltage

15 Toshiba s Leadership in Smart Community Projects Globally over 33 projects, expanding Smart Community by meeting each regional challenge * Acceptance of order by Ansaldo Trasmissione & Distribuzione S.p.A10

16 Smart Community Era Smart Grid Era Conventional Grid Era Energy Service Provider Smart Community Smart Grid T&D Products Energy Management System Gridstream TM Smart meter

17 Committed to People Committed to Future