SECTION 16910 · Web viewFor example, are the input and output transformers specially designed to reduce harmonics or sound? Are filters required to reduce harmonics? 3.t Are there

SECTION 16262 - APPENDIX C

SFC CONTRACTOR QUESTIONNAIRE

PART 1 - GENERAL

1.01 RELATED SECTIONS

A. Section 16262 – Static Frequency Converter

B. Section 16262A – SFC Technical Fill-In Data Sheets

C. Section 16262B – SFC Document Submittal Schedule

PART 2 - PRODUCTS

2.01 TECHNICAL FILL-IN DATA SHEETS

The SFC Contractor shall complete the following questionnaire and submit to SEPTA with the Request for Proposal Bid Documents.

Note that the numbering of the questions follows those presented in the 15% Scope Definition Report. Some questions have been deleted, some revised, and a few new questions have been added.

Wayne Junction SFC 16262C-1 60% Design SubmittalRehabilitation Project November 29, 2016

No. Question Response1. Converter system - existing equipment1.a Are you able to rehabilitate the existing cycloconverter

power block equipment? This would involve refurbishing all thyristor-controlled power equipment to restore the system to like-new performance, with an expected lifetime of no less than forty years. Please describe how equipment would be refurbished.

1.b Are you able to rehabilitate the existing control room equipment? This would involve refurbishing all control room equipment, including converter computers, load sharing equipment, and converter protection relays, to restore the system to like-new performance, with an expected lifetime of no less than forty years. Please describe how equipment would be refurbished.

1.c If proposing new SFC power-block equipment (the latest technology), are you able to use the existing SFC input and output power transformers? If technically compatible, would you be able to refurbish in order to achieve an expected lifetime of no less than forty years?

2. Converter system - new equipment2.a Are you able to provide a new SFC system that will be

technically and functionally compatible with SEPTA's existing 60 Hz-to-25 Hz power supply system? In other words, can you provide a replacement converter system that will meet SEPTA's requirements?

2.b What type of converter system do you propose, e.g., dc-link, cycloconverter?

Wayne Junction SFC 16262C-2 90% Design SubmittalRehabilitation Project April 29, 2017

No. Question Response2.c What type of power electronics is used in your converter

system, e.g., IGBT, IGCT?

2.d Is there inherent redundancy with your design? For example, if one module fails, will the converter keep functioning and supply real and reactive power to the 25 Hz system?

3. Converter system operation3.a.1 The existing cycloconverters are rated as follows:

Each can supply 15 MVA continuously, then supply an overload of 18 MVA for 1 hour, 24 MVA for 6 minutes, 30 MVA for 30 seconds, and 4000 A for 2 seconds at 12 kV, followed by 15 MVA for 1 hour before next overload cycle.

Please confirm your equipment will meet these ratings:15 MVA continuous power18 MVA for 1 hour24 MVA for 6 minutes30 MVA for 30 seconds4000 A for 2 seconds at 12 kVfollowed by 15 MVA for 1 hour before next overload cycleInput power factor: ≥0.95 laggingOutput power factor: ≥0.7 lagging

3.d Are your proposed converters a standard design or do you propose to modify your standard design (either increase ratings or decrease ratings) in order to meet the SFC continuous and overload power requirements?

3.e What are the benefits of your proposed technology over the other available vendor equipment on the market today?


No. Question Response3.f Please provide electrical single-line and schematic drawings

for the proposed system to assist with bid evaluation.

3.g Please provide an estimated value and duration of short-circuit current that each converter will supply during a fault on the 60 Hz system or a fault on the 25 Hz system. Assume that the short-circuit is on the supply side of the 60 Hz circuit breaker or the load side of the 25 Hz circuit breaker. As a minimum, the 12 kV, 25 Hz side shall supply 4000 A for 2 seconds.

3.h With the converter step-down transformers supplied from a 13.2 kV, 60 Hz, three-phase system, what is the minimum and maximum required short-circuit current, voltage regulation, voltage transients, and voltage harmonics permissible from the utility or railway system in order for your SFC system to operate correctly?

3.i The present Wayne Junction SFC station transmits power from 60 Hz to 25 Hz only. Can your converter system operate with power flowing in either direction? Can the converter supply power from SEPTA's 25 Hz system to PECO's 60 Hz system?

3.j Are there any special requirements for your proposed converters to operate in parallel with SEPTA's existing three 15 MVA cycloconverters on the same 24/12 kV, 25 Hz, single-phase bus?


No. Question Response3.k Describe how the new SFC units will share real and reactive

power load with the existing cycloconverters. In order to share real and reactive power equally, will the new converter equipment need to interface with the existing loading sharing equipment at Wayne Junction? Note that the existing load sharing equipment was designed for the addition of a fourth unit. Please address whether you will need to perform a field test to determine the existing SFCs' droop curves (real power vs. load angle, reactive power vs. bus voltage).

3.l Are there any issues with operating new SFC technology in parallel with existing cycloconverters? For example, the existing cycloconverters have filters on both 60 Hz and 25 Hz sides. Will this impact the design or operation of new SFCs, considering that the existing filters will most likely be removed if four new SFCs are provided?

3.m Describe the startup and shutdown operating sequence and instructions for your equipment. For example, are there any special synchronizing requirements or procedures required for your equipment? How are the 60 Hz and 25 Hz circuit breakers controlled?

3.n What are the operating modes of the converters, e.g., startup (black start), power operation, reactive power operation?

3.o Can the converters operate during a momentary loss of 60 Hz utility power? What is the time of the longest allowable momentary loss of 230 kV, 60 Hz supply voltage that the converters can withstand before they need to be automatically separated from the 60 Hz system?


No. Question Response3.p Can the converters operate during a continuous loss of 13.2

kV, 60 Hz, 3-phase utility power to function as a source of reactive power to SEPTA's 25 Hz system, given that 480 V auxiliary power is still available?

3.q What are the no-load losses and full-load losses of each (15 MVA) converter unit operating separately? What are the no-load losses and full-load losses of all four converter units operating together? Please provide a graph of losses as a function of loading from 0% load to 100% load. The losses shall be for a single converter unit between the 13.2 kV terminals of the input transformer to the 24/12 kV terminals of the output transformer or reactor. Losses shall include all auxiliary power system components.

3.r What are the harmonic currents expected from the converter system during normal operation? During full-load operation, what are the typical values of the fundamental and harmonic currents? Provide the values for current in amperes for the fundamental and each harmonic.

3.s How is harmonic current control designed into your system? For example, are the input and output transformers specially designed to reduce harmonics or sound? Are filters required to reduce harmonics?

3.t Are there any special electromagnetic interference mitigation requirements? For example, do the converters require a Faraday cage or special screens around the converter buildings?

3.u What are the noise levels associated with the converter in full power production?


No. Question Response3.v What is the highest normal operating voltage of the SFC

power block? If you are using open-rack equipment with exposed energized parts, this will determine clearance space around equipment per NFPA 70, The National Electrical Code. Please note that this project plans on requiring that the room housing the SFC power block is automatically de-energized as soon as a door is opened to the room - no person will be allowed to work on or near energized SFC equipment.

4. Layout, Dimensions, and Weights4.a Based on the site dimensions provided on RFP drawings,

will your proposed converter system equipment fit within the available areas, e.g., filter yards, input and output transformer areas, SFC rooms, control room, roof? What are the major components that will be placed in these areas?

4.b What are the minimum clearances required to bring your SFC equipment into the SFC rooms? Are the doorways and corridors wide enough to bring your new equipment into the building? Are doorway heights sufficient? Are SFC room heights sufficient?

4.c What are the minimum clearances required around the completed SFC equipment after installation?

4.d Describe the typical building requirements for your complete converter system, e.g., control room, converter room, pump and water conditioning, air cooling and ventilation, fire protection.

4.e Can any of the equipment be designed for multi-story construction so that physical layout space can be reduced? For example, can the heat exchangers be placed on the SFC building roof?


No. Question Response4.f Please provide typical layout drawings with dimensions and

labeled components. Provide the overall converter system dimensions, i.e., area required for input transformers, filters, converters, cooling system, output transformers, and reactors. Note that equipment must fit within the designated areas on RFP drawings.

4.g Provide the 60 Hz input transformers dimensions and weights, including tank, radiators, and conservator.

4.h Provide the 60 Hz filter and/or reactor dimensions and weights.

4.i Provide the SFC power block dimensions and weights.

4.j Provide the dc filter dimensions and weights.

4.k Provide the cooling equipment dimensions and weights.

4.l Provide the 25 Hz output transformers dimensions and weights, including tank, radiators, and conservator.

4.m Provide the 25 Hz filter and/or reactor dimensions and weights.

4.m What are the foundation requirements of your equipment?

4.o The existing SFC thyristor equipment is enclosed in metal panels within the SFC rooms. Personnel are able to walk into the SFC rooms while the equipment is in operation. To access SFC #1 room, personnel walk from the control building corridor, through SFC #2 room, and into SFC #1 room without shutting down equipment. Will your proposed SFC equipment be enclosed in metal cubicles? Note that access to SFC power block equipment rooms will be prohibited when equipment is energized.

5. 60 Hz input transformers5.a What type of input transformers are required, i.e., number

transformer tanks per converter, number of windings per tank, connection type, grounding?


No. Question Response5.b What type of transformer cooling is provided, i.e., fans, oil,

water?5.c How many gallons of oil per tank, radiators, and

conservator?5.d Does your design use "charging transformers"? These are

typically energized prior to energizing the main transformers in order to charge the converter capacitors or power transformer magnetizing circuits, reducing the inrush current when starting the system.

5.e What type of transformer insulating oil is being offered?6. 60 Hz filters6.a Are 60 Hz harmonic filters required?

6.b How is filtering accomplished? Are there separate filters? Are they always in operation?

7. DC filters7.a Are DC harmonic filters required?


8. 25 Hz filters8.a Are 25 Hz harmonic filters required?


9. 25 Hz output transformer and/or reactors9.a What type of output transformer is required, i.e., number

tanks per converter, number of windings per tank, connection type, grounding?

9.b What type of transformer cooling is provided, i.e., fans, oil, water?

9.c How many gallons of oil per tank, radiator, and conservator?


No. Question Response9.d The converters are required to supply power to a 24/12 kV,

25 Hz, single-phase traction power substation. If no step-up transformers are required, will the new converters require any type of reactors?

9.e What type of transformer insulating oil is being offered?

10. Circuit Breakers10.a Are there any special circuit breaker requirements for the

13.2 kV, 60 Hz, 3-phase side of the converters? The existing circuit breakers used for each SFC are Siemens type GM1-1000-3000-77 vacuum interrupters rated 15 kV, 3000 A. There is a spare circuit breaker of the same model that could be used for SFC #4.

10.b Are there any special circuit breaker requirements for the 24/12 kV, 25 Hz, 1-phase side of the converters?

11. Auxiliary Power System11.a The station has 480 V, 60 Hz, 3-phase power available for

supporting the SFC auxiliary systems. What type of auxiliary power system is required to supply the converter system during shutdown, startup, and normal power operation?

11.b What is the required capacity of the ac auxiliary power system for each converter unit, including all auxiliary supporting equipment?


No. Question Response11.c What is the required capacity of the dc auxiliary power

system, including charger size and battery amp-hour capacity?

11.d What is the longest allowable momentary loss of the 480 V, 60 Hz auxiliary power distribution system that the converter system can withstand before it stops supplying power to the 25 Hz railway system?

11.e The Project plans on supplying two independent 480 V, 60 Hz, 3-phase power feeders directly to the SFC power distribution equipment for each SFC unit (a total of eight power feeders for all four SFCs). It is assumed that each SFC power distribution panel will have a transfer switch between the two supplied 480 V power feeders. It is also assumed that each SFC power distribution system has a dry-type transformer to step voltage down to 208Y/120 V ac, or any other voltage required to operate the SFC system. Please confirm the assumptions and describe your local SFC power distribution system.

11.f The Project plans on supplying the roof mounted air-conditioning system for each SFC room from the SFC power distribution system located in the SFC room, which is fed from the two independent 480 V power feeders. This allows each SFC room to operate independently, including local power distribution to auxiliary equipment. Please confirm this method is acceptable.

12. Protection12.a What type of converter protection systems are required?

12.b For internal faults, how does the converter trip the 60 Hz system input circuit?

12.c For internal faults, how does the converter trip the 25 Hz system output circuit?


No. Question Response12.d* Where will the 60 Hz and 25 Hz transformer protection

relays be located, e.g., within your proposed converter control building?

13. Environmental Cooling, Heating, and Air Handling13.a What type of cooling system is required for converter

operation?

13.b What type of heating and cooling systems are required for the buildings?

13.c How many pumps are required to operate the converter cooling system?

13.d Are there pollution limitations or filtration requirements?

13.e What are the environmental conditions required for the converter system components?

13.f Is there redundancy in the cooling, heating, and air handling equipment for the converters?

13.g Does the cooling system have a remote tank for cooling liquid level monitoring and filling?

13.h Are there any check valves or monitoring on the cooling system to stop the flow of coolant should there be a coolant rupture?

13.i How are the cooling tubes connected to the system, e.g., quick-connect, bolted?

13.j How much heat is given off of a SFC unit during full-load operation?

13.k At what temperature and humidity must the SFC room be maintained during full-load operation and when the SFC is shut down?


No. Question Response13.l Is a moisture or humidity control system required?

14. Communications and Controls14.a What type of computer operating system do the converters

use?14.b What type of computer communication protocols are used?

14.c Are the communication system languages proprietary?

14.d How is the converter system operated? Can it be operated locally and/or remotely?

15. Manufacturing15.a Describe how you can comply with "Buy America"

requirements per United States Code Title 49 (49 U.S.C.), Section 24405(a)(1), i.e., how you will use steel, iron, and manufactured goods for this project that are produced in the United States.

15.b Provide the manufacturer names and locations where the major components will be made.

16. Testing and Commissioning16.a How will the system be tested and commissioned? The

Wayne Junction station must be kept operational at all times with a minimum of two SFCs in-service.

16.b If components of the system need to be separated or specially built to accommodate the limited space requirements at the Wayne Junction site, how will this affect the commissioning of the system?

17. Shipping


No. Question Response17.a What is the largest item to be shipped to the site? What are

the dimensions and weight of this item?

17.b How are components shipped? Describe the contents of typical shipping sections, e.g., transformer tanks, radiators, conservator, converter power block, cooling system components, filters, etc.

17.c Will the converter power blocks be pre-assembled, tested, and installed in a final containment prior to shipping to the site, or will the power blocks be assembled, installed, and tested inside the SFC rooms after arriving at site?

18. Assembly18.a Who will be required to assemble the equipment at the

Wayne Junction site? Will the assembly of equipment require special supervision by the SFC manufacturer?

18.b Is special training required to assemble the equipment?

18.c What is the estimated division of labor while assembling the converter system at the Wayne Junction site, e.g., 20% by the SFC vendor and 80% by others?

19. Maintenance and Support19.a What is the normal maintenance schedule for your provided

equipment?19.b Where are the converter maintenance facilities located?

19.c Where is "customer support" located?

19.d Where are replacement parts built?

19.e Are the maintenance and support personnel part of the same company that designed and installed the equipment?

20. Training20.a Is special training required to maintain your equipment?


No. Question Response20.b What type of training program is recommended?21. Parts21.a Are any proprietary parts requiring SEPTA to buy

replacement parts from only one vendor?21.b Are the parts for proposed converter system used by your

company in any other industry? For example, are any parts of the converter power block used in the wind generation industry or motor drive industry? Can any parts of the converter system be directly replaced by parts used in these other industries? Please provide specific examples where your converter parts are currently being used, such as the name of the product line and number of these products being used.

21.b.1* SEPTA is concerned that converter system parts may become obsolete within 20 years. Specific parts of concern are the control cards or power electronic devices. In your proposal, you confirmed that the parts used by your proposed converter system are also used by your company in any other industries. Please provide specific examples where your converter parts are currently being used, such as the name of the product line and number of these products being used.

21.c Can the parts supplied by your converter system be supplied by several vendors or are they exclusive?

21.d What are the life spans of the components?

21.e What is the designed life span of the power delivery system?

21.f What is the designed life span of the cooling system?

21.g What is the design life of the converter control system?

21.h How many major parts are in the system? Describe how they are grouped or preassembled.


No. Question Response21.i What parts of the converters are considered modular?

21.j Are there any hazardous materials associated with your proposed system? If so, please provide references to material safety data sheet (MSDS) information.

22. Reliability22.a What are the mean-time-between-failure (MTBF) indices

for the major components of the converter system? Please provide a system availability calculation to evaluate the statistical performance of the system over a long period of observation in terms of the mean time between failure (MTBF) for components and the system.

22.b What are the failure rates?

22.c What are the repair times for various failure modes of your equipment?

22.d What is the availability of parts?

22.e How many years have the parts supplied with your system been in service in the industry?

23. Experience and References23.a How many similar sized facilities does your company have

in operation?

23.b What is the commissioning date of the last supplied similar facility? Where is it located?

23.c Please provide references for your equipment installed in similar conditions. References shall include client name, installation date, installation location, type of system, system ratings, contact information, and cost.


No. Question Response23.d Please provide a summary of any known failures of

operating converter systems supplied by your company. Provide a brief summary of the failure and how your company responded to the failure. For example, if your converter technology was known to recently experience high-voltage transients when an output fault was cleared, how was this deficiency corrected?

23.e Have you installed and tested a similar type of facility to Wayne Junction? For example, has your company installed new SFC units in parallel to existing older SFC units at the same substation? If so, how were the units made to share real and reactive power load?

24. Cost Proposal24.a Provide your cost based on supply of: 60 Hz filters and/or

reactors as required; 60 Hz input transformers; the SFC power block equipment; associated cooling and control equipment; 25 Hz output transformers; 25 Hz filters and/or reactors as required; protective relays and instrument transformers; all interconnection wiring and bus work; design engineering associated with the supply of the SFCs and related equipment; factory testing; delivery; installation support; and commissioning.

25. Schedule25.a Please provide the schedule for the design, production,

factory testing, shipping to the Wayne Junction site, assembly at the site, site testing and commissioning, training, and turnover for SEPTA operation.


No. Question Response26. Construction Phasing26.a There are three existing SFC units with one new unit to be

added at Wayne Junction. Two SFC units are to remain in-service, with on in stand-by, at all times during the replacement of the three existing units and addition of the new unit. The Project is planning on building the new SFC #4 building first, then replacing SFC #3, SFC #1, and SFC #2, in that order. The sequence is based on a planned method of removing equipment from each room. Each unit must be commissioned at the completion of each unit's installation. Please provide your suggested construction phasing sequence, including demolition, installation, and commissioning requirements.

26.a.1 Based on your site walkdown, do you have any suggestions for construction phasing, demolition,installation, or commissioning?

26.c The Project is planning that SFC rooms will be accessed by constructing a wall between the existing outside doorways and the SFC power block equipment. The SFCs will be accessed through double-doors from the new corridor. This will keep the SFC power block equipment free of debris. SFC power distribution equipment, controls, and pump skids would be located in this corridor area, outside of the SFC power block room. Please provide your assessment of this proposed installation arrangement.

END OF SECTION
