Hybrid Grid and Energy Storage: A Step towards Adaptation, Application and Development

Transcription

1 Hybrid Grid and Energy Storage: A Step towards Adaptation, Application and Development BY J.S. CHANDOK AGM(NETRA) NETRA, NTPC LTD.

2 About NTPC and NETRA India s MAHARATNA & Leading Power Generating Company with 48 GW of Installed capacity with decent fuel mix. ( Installed Renewable power (Solar and Wind) of 410 MW and more than 600 MW Solar and Wind projects are in pipeline. Major contributor to mission of 175 GW of Renewable power by GOI : 25 GW of Solar Power. Solar PV with Storage project for Green Andaman : a. 8 MW SPV, WITH 3.2 MW, 1.6 MWHR b. 17 MW SPV, 6MW, 24 MWHR. NETRA (NTPC Energy Technology Research Alliance), R&D Wing of NTPC : focus areas of Energy and Efficiency Improvement, Renewable Energy and Climate change.

3 Introduction With Large Renewable penetration, Maintaining stable supply of high-quality electricity : Urgent issue with large Renewable. Integration with thermal power : a great Responsibility for NTPC to bring flexibility in thermal plants and in the power system as well. Hybridization of Renewable Resources: Complement each other and also optimize size of battery storage. Hybridization of Renewable resources and Battery energy storage systems : Promising option to mitigate this issue and gaining popularity. Combination of Battery storage ( high power & High Energy) : Required to cater short cycle and long cycle fluctuations Requires Adaption, Suitable applications and development of low cost battery system, NETRA is positioned to take up this.

4 Hybrid Grid & Storage Activities: NTPC NETRA Adaptation Trial of existing Technology Field trial of NAS battery under the Indian Climate and under Indian grid Condition followed by Modification in battery system as per Indian Grid. Application Possible applications Solar wind Hybrid system Installation. In future Solar wind Hybrid with storage. Setup of pilot plant for 24X7 Solar PV with Energy Storage System at NTPC, KAWAS Development Cost Effective Innovations A new kind of redox flow battery development with IISc, Banglore Soluble Lead Redox Flow Battery(SLRFB) Development of Control and Protection for Hybrid Renewable Integration with IIT Kanpur NETRA NTPC Energy Technology Research Alliance, R&D wing of NTPC Limited

5 Technology Adaptation NAS BATTERY DEMO PROJECT AT NETRA FIELD TRAIL OF NAS BATTERY

6 1.2 MWHR test system 1. Under Research agreement M/s NGK Insulator Pvt Ltd Japan, NETRA is conducting field trials and testing of 1.08 MWhr NaS battery system 2. Intent : Evaluate the efficacy of system for various charging discharging pattern, including solar variation etc, In Indian environment and grid condition 3. The system is installed in Oct 2016 and shall tested and evaluated for six months upto April 17. Basic working Principle ITEMS Battery Size ACTIVE POWER CONNECTION VOLTAGE Cell Temp VOLTAGE RANGE CURRENT RANGE DC RIPPLE CURRENT STORAGE ENERGY AC/DC CON. EFFICIENCY AUX POWER Fast response SPECIFICATION 200 KW 180 KW 3 PHASE/3 WIRE/400V 300 Deg C DC138~DC228 V ~1050 A TO A <10% P-P 1080 kwh-ac 95% 3 PHASE/3 WIRE/400V 35 KW/UNIT Full power charge and discharge in 1 ms

7 BESS Power [kw] Power [kw-ac] Power [kw-ac] Operation Profiles for NAS TEST Basic Profiles [1-1 Rectangular] To learn the most basic performance Charge: 180kW x ~10H Discharge:(a)180kWx6.1H (b)170kwx7.0h (c)160kwx7.5h (d)150kwx8h Charge Discharge Pattern (a) Pattern (b) Pattern (c) Pattern (d) :00 3:00 6:00 9:00 12:00 15:00 18:00 21:00 0:00 [1-2 Trapezoidal] To learn the performance in typical Load Leveling 200 Charge: 180kW x ~10H 150 Discharge:(a)Peak: 180kW x3h (b)peak: 170kW x3h 100 (c)peak: 160kW x3h Charge Discharge Pattern (e) Pattern (f) Pattern (g) :00 3:00 6:00 9:00 12:00 15:00 18:00 21:00 0:00 Time

8 Power [kw] Operation Profiles for NAS TEST 2. Typical Profiles from the Solar PV simulation [2-1 Typical Sunny Day] Actual Energy Shift Capability PV NAS + PV Smoothing & Energy Shift NAS Charge Time C Energy Shift NAS Discharge D Time C D [2-2 Typical Cloudy] Actual Smoothing & Energy Shift capability

9 Technology Application : Storage & Hybrid Grid 1. 24X7 PV-BATTERY STAORAGE SYSTEM AT NTPS KAWAS 2. MULTITECHNOLOGY TEST BED FOR 5 MWp NTPC ANDAMAN PROJECT 3. SOLAR WIND HYBRID SYSTEM AT NTPC KUDGI

10 Solar with Battery Storage at NTPC, KAWAS Objective To achieve 24 X 7 power and power on demand Realizing Isolated grid Operation Reliable power with both islanded and grid control operation Smart grid features like load control, advanced protection for both operation Salient Details Location : NTPC Kawas Area available :5 Acres Power evacuation : Isolated colony load ( KW) by two feeder) Configuration: 1 MW Solar and min 500 kw battery storage power, 3.6 MWHR Flat load 24 X 7 :170 KW with 10 solar hrs and 14 battery hrs

11 Solar with Battery Storage at NTPC, KAWAS

12 Multi Technology Test Bed Objective: To Integrate battery storage with Floating PV & Forecasting and analyze technoeconomics for the utility of Floating PV and different battery storage system. Configuration: 5 MW is divided into three parts of 1.67 MW each, and separate storage system is proposed for the same. Part Part 1 (1.67 MWp Solar), 8 hr operation Part 2 (1.67 MWp Solar), 12 hrs operation Part 3 (1.67 MWp Solar) 24 hrs operation Calculated Base load and battery capacity 0.82 MW, 1 MWHR 0.53 MW, 2.6 MWHR 0.25 MW, 5.0 MWHR Proposed battery capacity* 1 MW, 1 MWhr (Li-ion battery / Advance Lead Acid) 0.6 MW, 2.4 MWhr (Li-ion/ NaS / Advance Lead) 0.8 MW, 4.8 MWhr (NaS / Flow Battery) *The proposed battery capacity has been selected based on available size in the market. The above sets of battery system will be procured separately as different battery suits to different application and suitability of a particular battery for a given option can be studied

13 MultiTechnology Test Bed Intent 1. Flat load operation of the 5 MWp PV Plant 2. Understanding different battery technologies for integration with solar PV and grid. 3. Applicability of various battery technologies for different applications. 4. Cost economic studies of different batteries in different applications. 5. Grid stabilization study 6. Understanding O&M requirements of different batteries in different applications. 7. Finalization of effective, cost economic application for battery storage for renewable integration for present and future scenarios. 8. Development of control algorithm for different DoDs of batteries.

14 Pilot Plant : Solar Wind Hybrid at Kudgi Configuration : 2 MW Wind + min 1 MW solar Objective To maximize the yield from an identified piece of land : High eff Panel Establish the benefits of solar wind hybrid plant over the individual solar or wind plant. : Hybrid system (at DC or AC) The effective land utilization by installing the solar PV panels in area around wind turbine avoiding shadow of the wind turbine is the objective of the project. : Land Optimization (shadow free zone 9-15 hrs) Development of control strategy for active power control when cumulative generation of the solar and wind is above the evacuation capacity is the integral part of the project. Control with lower Evac Advantage : Land Optimization, Reduced cost of Evacuation, Improved Power Generation profile, Reduction in O&M cost, Optimal sized battery storage.

15 Different Configurations Proposed by Different Wind DC Integration of Solar Wind (Type 4) and storage DC Integration of Solar & storage with Type 3 Wind AC integration DC Integration of Solar, Type3 Wind AC Integration of Solar, Wind (type 4) & storage

16 Technology Development : Storage & Hybrid Grid W X 5 hr SOLUBLE LEAD ACID FLOW BATTERY WITH With IISc Bangalore 2. DEVELPOMENT OF CONTROL AND PROTECTION FOR HYBRID RENWABLE INTEGRATION - WITH IIT Kanpur

17 Soluble Lead Redox Flow Batteries Advantages : No membrane is required Single electrolyte and hence single pump No expensive catalyst required Materials are available abundantly Electrolyte : Lead methanesulphonate salt in Methanesulphonic acid Electrodes: Graphite foam at anode, Inter-digital fluid-flow design at cathode At anode, Pb(CH 3 SO 3 ) 2 + 2e - Pb + 2CH 3 SO 3 - E o = V vs. RHE At cathode, Pb(CH 3 SO 3 ) 2 + 2H 2 O PbO 2 + 2CH 3 SO H + + 2e - E o = 1.49V vs. RHE Overall cell reaction, 2Pb(CH 3 SO 3 ) 2 + 2H 2 O Pb + PbO 2 + 4CH 3 SO 3 H E o = 1.62V

18 DEVELPOMENT OF CONTROL AND PROTECTION FOR HYBRID RENWABLE INTEGRATION 1. Development of master controller for power sharing among sources and storage elements Local controller for wind /solar/battery. Islanding/ grid connected operation, Proportional power sharing. Voltage / freq response 2. Protection scheme and load control Fault level or grid connected or islanded operation. Adaptive protection scheme. Optimal load shedding/curtailment 3. Communication Between various renewable sources, Battery power 4. Establishing software and management system Solar PV Battery Solar PV Renewable Integration Platform 440V DC- DC DC- DC AC- DC Wind (PM Gen) 440V DC Bus Switch Loads-3 Solar Inverter Solar Inverter PCC Battery Inverter Battery Loads-2 Battery Inverter Wind (DFIG) Control and Monitoring PC Control Control Control Control Control Control Control Ethernet RTDS

19 DEVELPOMENT OF CONTROL AND PROTECTION FOR HYBRID RENWABLE INTEGRATION ADVANTAGE TO POWER SECTOR Controllers for AC/DC Hybrid Renewable Integration (HRI) system Testing and validation of controller using real time digital simulator (RTDS) to minimize uncertainty of performance in high power installations. In future, the developed platform could be used to conduct viability study of integrating HRI systems to the grid. Integrated communication to support both control and monitoring Coordination between the developed protection schemes and the associated controller operation

20 Conclusion Hybrid Grid and Battery storage System With large Renewable penetration Technology Adaption, development and Pilots applications are important aspects to make path for future Hybrid Grid integration and sizing of optimal battery system around this is important for cost effective solution for dispatchable power Flexibility in the power system through Renewable resource forecasting and demand side management, smart grid aspects should be initiated. Understanding of Indian grid condition and modification in the control of battery PCS control is an important aspect Evaluation criteria for different battery system, combination of battery system with different life cycle, efficiency and application (power and Energy Intensive) is important

21 Thank You! 21