Wayside Energy Storage Assessment for Metra-Electric
Total Page:16
File Type:pdf, Size:1020Kb
Wayside Energy Storage Assessment for Metra-Electric A Study on How Implementing a Wayside Energy Storage System Would Impact Energy Usage on the Metra Electric District December 17, 2018 Mott MacDonald 10 South LaSalle Street Suite 2520 Chicago IL 60603 United States of America T (312) 894-5369 mottmac.com Wayside Energy Storage 392164 01 E C:\Users\gre75082\Desktop\SAMPLE.docx Assessment Mott MacDonald for Metra-Electric A Study on How Implementing a Wayside Energy Storage System Would Impact Energy Usage on the Metra Electric District December 17, 2018 Mott MacDonald | Confidential | Wayside Energy Storage Assessment for Metra-Electric A study on how implementing a Wayside Energy Storage System would impact Energy Usage on the Metra Electric District Issue and revision record Revision Date Originator Checker Approver Description A 18 Oct 2018 K Patel D Hetherington M Walbrun First Issue J Green B 30 Nov 2018 K Patel D Hetherington M Walbrun Updated for RTA and J Green Metra comments C 06 Dec 2018 K Patel D Hetherington M Walbrun Final update for RTA and J Green Metra comments D 13 Dec 2018 K Patel D Hetherington M Walbrun Final Report J Green E 13 Dec 2018 M Walbrun J Green D Hetherington Add non-financial benefits to WESS report data Document reference: 392164 | 01 | E Information class: Standard This document is issued for the party which commissioned it and for specific purposes connected with the above- captioned project only. It should not be relied upon by any other party or used for any other purpose. We accept no responsibility for the consequences of this document being relied upon by any other party, or being used for any other purpose, or containing any error or omission which is due to an error or omission in data supplied to us by other parties. This document contains confidential information and proprietary intellectual property. It should not be shown to other parties without consent from us and from the party which commissioned it. This report has been prepared solely for use by the party which commissioned it (the ‘Client’) in connection with the captioned project. It should not be used for any other purpose. No person other than the Client or any party who has expressly agreed terms of reliance with us(the‘Recipient(s)’) may rely on the content, information or any views expressed in the report. We accept no duty of care, responsibility or liability to any other recipient of this document. This report is confidential and contains proprietary intellectual property. Contents 392164 | 01 | E | December 17, 2018 C:\Users\gre75082\Desktop\Metra_LFA & Site Visit Report (public copy).docx Mott MacDonald | Confidential | Wayside Energy Storage Assessment for Metra-Electric A study on how implementing a Wayside Energy Storage System would impact Energy Usage on the Metra Electric District Executive Summary 1 1 Introduction 2 2 Abbreviations 3 3 Project Background 4 3.1 Project Description 4 3.2 Scope 4 4 Simulation Input Data 5 4.1 Simulation Software Background 5 4.2 Scope of Simulation 5 4.3 Simulation Parameters 5 4.4 Paths and Timetables 7 4.5 WESS Inputs 7 5 Simulation Results 9 5.1 Existing Metra Operating Conditions 9 5.2 Simulations with added Wayside Energy Storage Systems 12 5.3 WESS at 51st Street TPSS 13 5.4 WESS at Front Avenue TPSS 14 5.5 WESS at Riverdale TPSS 15 5.6 WESS at Harvey TPSS 16 5.7 WESS at Vollmer TPSS 17 5.8 WESS at Matteson TPSS 18 5.8.1 2000 A rated WESS 18 5.8.2 1000 A rated WESS 18 5.9 Energy Savings Summary 19 6 Equipment Required 21 6.1 General 21 6.2 WESS 21 6.2.1 Super Capacitor 22 6.2.2 Flywheel 23 6.2.3 Frequency Regulation Market 23 7 TPSS Site Survey Results 24 7.1 Site Visit 24 392164 | 01 | E | December 17, 2018 C:\Users\gre75082\Desktop\Metra_LFA & Site Visit Report (public copy).docx Mott MacDonald | Confidential | Wayside Energy Storage Assessment for Metra-Electric A study on how implementing a Wayside Energy Storage System would impact Energy Usage on the Metra Electric District 7.2 General 24 7.3 National Electrical Code 24 7.4 Matteson TPSS 24 7.5 Riverdale TPSS 25 7.6 51st Street TPSS 26 8 Conclusions and Recommendations 28 A. Electrical Resistance 29 B. Plots 31 C. Manufacturer’s Information 56 D. Marked up TPSS Layout Drawings 57 E. Photos for Matteson TPSS 58 F. Photos for 51st Street TPSS 59 G. Photos for Riverdale TPSS 60 392164 | 01 | E | December 17, 2018 C:\Users\gre75082\Desktop\Metra_LFA & Site Visit Report (public copy).docx Mott MacDonald | Confidential | Wayside Energy Storage Assessment for Metra-Electric 1 A study on how implementing a Wayside Energy Storage System would impact Energy Usage on the Metra Electric District Executive Summary The RTA and Metra have undertaken an assessment of opportunities for deployment of wayside energy storage systems (WESS) on the Metra-Electric District commuter rail line in an effort to improve operational efficiency and capture potential new revenue streams. Wayside energy storage systems are able to capture lost energy from braking and have been used by several other US transit agencies. A Load Flow Analysis was undertaken for Metra on Mott MacDonald’s simulator program, TRAIN. The Load Flow Analysis provided information about the “station to station” runs where the most energy is being wasted in the train’s onboard resistors (rheostatic braking). To help identify which substations in these areas can be equipped with a WESS, Mott MacDonald built a peak hour model (06:30 to 08:30) and an off-peak hour model (10:00 to 12:00) to assess the difference in recovered regenerative energy during the peak and off-peak periods. The simulations were re-run with a WESS at Riverdale, Harvey, Vollmer, Matteson, 51st Street and Front Avenue TPSS to assess the amount of regenerative braking energy being reclaimed. According to the current Metra operating schedule, the largest amount of energy wasted in rheostatic braking is on the Metra Electric District Main Line south of the Kensington station. Mott MacDonald then narrowed down to six TPSS sites which were suitable for the installation of the WESS. This report shows the approximate cost of energy savings of the modelled WESS at each site, and the approximate cost to install a WESS. The Load Flow Analysis undertaken by Mott MacDonald identified that Matteson TPSS, 51st Street TPSS and Riverdale Tie Station (being upgraded to a TPSS in near future) would be the electrically preferred sites to install a WESS along the Metra Electric District Main Line. The site surveys of these three TPSS show that Matteson TPSS would be the preferred option from an installation perspective though it would require some civil work in terms of external grading as the WESS would be best located outside in a container. The approximate total installation cost for a 1000 A, 8 kWh WESS is $850,000. With an approximate annual energy savings of 396.4 MWh, which at the $0.07 price per kWh Metra pays for electricity, equates to an annual energy savings of approximately $28,000. The economic payback period would be around 30 years. The approximate total installation cost for a 2000 A, 8 kWh WESS is $1,100,000. With an approximate annual energy savings of 415.4 MWh, which at the $0.07 per kWh price Metra pays for electricity, equates to an annual energy savings of approximately $29,000. This would provide a payback period of around 38 years. Based on this analysis, a WESS installation is not financially beneficial to Metra. However, there are other environmental and operational benefits that make it worthwhile, particularly if Metra is ever in a position to decrease the upfront capital cost through grants. Moreover, if Metra ever operates more service on the line, the potential benefits are also increased. Thus, it may be worthwhile to consider in the future. 392164 | 01 | E | December 17, 2018 C:\Users\gre75082\Desktop\Metra_LFA & Site Visit Report (public copy).docx Mott MacDonald | Confidential | Wayside Energy Storage Assessment for Metra-Electric 2 A study on how implementing a Wayside Energy Storage System would impact Energy Usage on the Metra Electric District 1 Introduction The amount of the regenerated energy which is being wasted in the trains onboard resistors when the overhead contact system is not in a receptive state, can be utilized by using a WESS. Therefore, the ability of a WESS to store regenerated energy and release this back to the line when needed was the primary effort of the study. Load Flow Analysis was undertaken for Metra on simulator program, TRAIN. Load Flow Analysis provides precise information about the station to station runs where the most energy is being wasted and the substations in these areas were equipped with a WESS and simulations were re-run to assess the amount of regenerative braking energy being reclaimed. Load Flow Analysis provides a reliable technical support to a proposed WESS position. Mott MacDonald built a peak model (06:30 to 08:30) and an off-peak model (10:00 to 12:00) to assess the difference in recovered regenerative energy during the peak and off-peak periods. These results helped Mott MacDonald to be ascertain about the locations where the most energy is being wasted in the train’s onboard resistors. The performance of the train was accurately simulated based upon the voltages, the train experience and the interaction between regenerated energy, substations, trains, and energy storage systems being correctly modelled.