Operational Load Flow Studies Under Summer Peak Loading Conditions
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Creation and maintaining a Web based Protection Database and Desktop based Protection setting calculation tool for Eastern Regional Grid Eastern Regional Power Committee 14 Golf Club Road, Tollygunge, Kolkata, West Bengal 700033 OPERATIONAL LOAD FLOW STUDIES UNDER SUMMER PEAK LOADING CONDITIONS September 2017 Power Research and Development Consultants Private Limited # 5, 11th cross, 2nd stage, west of chord road, Bangalore - 560 086, Karnataka Tel: +91- 80-23192159 / 23192168 E-mail – [email protected] Web site: www.prdcinfotech.com Web based Protection Database and Desktop based Protection setting calculation tool – ERPC Document reference details: LOA No : ERPC/PR_DBASE/2016/3567 Document reference No : PRDC/2017-2018/ERPC-WB/937 Revision Index Revision Description Date Remarks Summer-Peak 1.0 19.09.2017 Initial version Load Flow Report Based on the comments given by 1.1 Modification 20.09.2017 Mrs. Debarati Basu 2.0 Approved 20.09.2017 Approved Internal Approval Ms. Suman Kumari Prepared by 19.09.2017 Mr. Anirban Banerjee Reviewed by Mrs. Debarati Basu 20.09.2017 Approved by Dr. Nagaraja Ramappa 20.09.2017 2 PRDC Bangalore September 2017 Web based Protection Database and Desktop based Protection setting calculation tool – ERPC TABLE OF CONTENTS 1 INTRODUCTION ...................................................................................................................... 12 2 PROJECT SCOPE ................................................................................................................... 13 2.1 Database Building Activities for Operational Studies ...................................................... 14 3 SYSTEM OPERATIONAL DATA ............................................................................................. 15 3.1 Methodology adopted for performing the load flow analysis ........................................... 17 3.1.1 Data Collection Procedure .......................................................................................... 17 3.2 May 04, 2017 Peak system demand condition ................................................................ 19 3.3 Salient points of CEA planning criteria referred for network modelling and analysis of study results .................................................................................................................................. 19 3.3.1 Transmission line parameters .................................................................................... 19 3.4 Transformer parameters .................................................................................................. 21 3.4.1 Voltage limits .............................................................................................................. 21 3.5 Network element statistics for ER Grid ............................................................................ 21 3.5.1 Substation details ....................................................................................................... 21 3.5.2 Transmission line details ............................................................................................ 22 3.5.3 Transformer details ..................................................................................................... 22 3.5.4 Generation details....................................................................................................... 23 3.5.5 HVDC details .............................................................................................................. 23 3.5.6 Reactor details ............................................................................................................ 24 3.5.7 Load details ................................................................................................................ 24 3.6 Generation schedule details for operational load flow ..................................................... 24 4 OPERATIONAL LOAD FLOW STUDY ................................................................................... 27 4.1 Introduction to Load flow analysis .................................................................................... 27 4.2 Load Generation Balance from the results of operational load flow analysis .................. 29 4.3 Line loading conditions .................................................................................................... 33 4.4 Transformer loading conditions........................................................................................ 35 4.5 Voltage profile .................................................................................................................. 38 4.6 Analysis of the load flow study results ............................................................................. 43 5 SHORT CIRCUIT STUDIES ..................................................................................................... 44 5.1 Short circuit study result analysis..................................................................................... 45 6 CONCLUSION .......................................................................................................................... 47 3 PRDC Bangalore September 2017 Web based Protection Database and Desktop based Protection setting calculation tool – ERPC LIST OF FIGURES Figure 3.1: Constituents of Eastern Regional grid ........................................................................... 16 Figure 3.2: Scheduled generation, Import and Export of Eastern Regional grid ............................. 26 Figure 4.1: Block diagram of load generation balance of ER ........................................................... 32 4 PRDC Bangalore September 2017 Web based Protection Database and Desktop based Protection setting calculation tool – ERPC LIST OF TABLES Table 3.1: Data availability status .................................................................................................... 17 Table 3.2: ER loading details ........................................................................................................... 19 Table 3.3: Source of the data considered for the study ................................................................... 19 Table 3.4: Details of transmission line parameters .......................................................................... 20 Table 3.5: Details of transformer parameters ................................................................................... 21 Table 3.6: Voltage limits at different voltage levels prescribed in CEA’s “Transmission ................. 21 Planning Criteria” .............................................................................................................................. 21 Table 3.7: Existing number of sub-station in the ER ........................................................................ 21 Table 3.8: Summary of transmission line data in the ER ................................................................. 22 Table 3.9: Summary of transformers capacity in the ER ................................................................. 22 Table 3.10: Summary of Generator installed capacity in the ER ..................................................... 23 Table 3.11: HVDC Back to Back in the ER ...................................................................................... 23 Table 3.12: HVDC Link in the ER ..................................................................................................... 23 Table 3.13: Load Details of ER ........................................................................................................ 24 Table 3.14: Generation schedule Details of ER ............................................................................... 24 Table 4.1: Load generation balance Details of ER........................................................................... 29 Table 4.2: Load generation balance details of Bihar ........................................................................ 29 Table 4.3: Load generation balance details of Jharkhand ............................................................... 29 Table 4.4: Load generation balance details of Odisha ..................................................................... 30 Table 4.5: Load generation balance details of Sikkim ..................................................................... 30 Table 4.6: Load generation balance details of West Bengal ............................................................ 30 Table 4.7: Load generation balance details of DVC ........................................................................ 31 Table 4.8: Load generation balance details of CESC ...................................................................... 31 Table 4.9: Load generation balance details of DPL ......................................................................... 31 Table 4.10: Percentage loading details of lines of Eastern Region ................................................. 33 Table 4.11: Percentage loading details of lines of Bihar .................................................................. 33 Table 4.12: Percentage loading details of lines of Jharkhand ......................................................... 33 Table 4.13: Percentage loading details of lines of Odisha ............................................................... 34 Table 4.14: Percentage loading details of lines of Sikkim ................................................................ 34 Table 4.15: Percentage loading details of lines of West Bengal .....................................................