J.2.3 Synchronizing and Paralleling Specification 26 32 13.pdf

03-10-2024

26 23 13 - 1

SBU - CONTRACTING AND ACQUISITIONS

SECTION 26 23 13

GENERATOR SYNCHRONIZING AND PARALLELING CONTROLS

BAGHDAD, IRAQ, BDSC 50HZ GENERATOR EQUIPMENT REPLACEMENTS

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section specifies the furnishing, installation, connection, and testing of indoor control components for medium voltage synchronizing, paralleling and Essential Electrical System generators.

B. The generator synchronizing and paralleling controls shall be compatible and functional with the engine generators, protective relaying systems, annunciators, and all related components.

1.2 RELATED WORK

A. Statement of work

B. Section 26 32 13, ENGINE GENERATORS: Engine generators.

1.3 QUALITY ASSURANCE

A. Quality Assurance shall be in accordance with the statement of work and all other contract documents, including submittals and specifications.

1.4 FACTORY TESTS

A. Factory Tests shall be required.

B. Factory Tests shall be in accordance with statement of work and contract requirements and all manufacturers written instructions.

1. Generator synchronizing and paralleling controls shall be tested to assure that there are no electrical or mechanical defects. Tests shall be conducted in accordance with UL and ANSI standards and manufacturer written instructions, performance metrics and requirements.

1.5 SUBMITTALS

A. Submit in accordance with statement of work and the following requirements:

1. Shop Drawings:

a. Per the requirements of the statement of work.

b. Include sequences of operation and interconnecting controls diagrams, showing connections to switchgear, generators, and remote annunciators.

c. Certification from the manufacturer that representative generator synchronizing and paralleling controls have been seismically tested to International Building Code requirements.

26 23 13 - 2

Certification shall be based upon simulated seismic forces on a shake table or by analytical methods, but not by experience data or other methods.

2. Manuals:

a. When submitting the shop drawings, submit companion copies of complete maintenance and operating manuals, including technical data sheets, wiring diagrams, and information for ordering replacement parts.

1) The terminals of wiring diagrams shall be identified to facilitate installation, maintenance, and operation.

2) Wiring diagrams shall indicate internal wiring for each piece of equipment and the interconnection between the pieces of equipment, including related equipment specified in other sections.

3) Provide a clear and concise description of operation, including detailed information required to properly operate the equipment.

4) Approvals shall be based on complete submissions of manuals together with shop drawings.

b. If changes have been made to the maintenance and operating manuals originally submitted, submit updated maintenance and operating manuals two weeks prior to the final inspection.

3. Test Reports:

a. Two weeks prior to the final inspection, submit certified fabrication and assembly test reports and data sheets.

4. Certifications: Two weeks prior to the final inspection, submit the following.

a. Certification by the manufacturer that the generator synchronization and paralleling controls conform to the requirements of the drawings and specifications.

b. Certification by the Contractor that the generator synchronizing and paralleling controls have been properly installed, connected, and tested.

1.6 APPLICABLE PUBLICATIONS

A. Publications listed below (including amendments, addenda, revisions, supplements, and errata) form a part of this specification to the extent referenced. Publications are referenced in the text by the basic designation only.

26 23 13 - 3

B. International Code Council (ICC):

IBC-21..................International Building Code

C. National Fire Protection Association (NFPA):

70-23...................National Electrical Code (NEC)

110-22..................Emergency and Standby Power Systems

D. National Electrical Manufacturers Association (NEMA):

ICS 6-16................Enclosures

E. Underwriters Laboratories Inc. (UL):

50-15...................Enclosures for Electrical Equipment

508A-18.................Standard for Safety Industrial Control Panels

PART 2 – PRODUCTS

2.1 GENERATOR SYNCHRONIZING AND PARALLELING CONTROLS

A. Generator synchronizing and paralleling controls shall be integral to the on-board medium voltage switchgear, or housed in a separate cubicle, or be integrated into the controls on each paralleled engine generator. The functional requirements are identical for all system topologies.

B. The generator synchronizing and paralleling controls shall perform automatic and manual operation, synchronization, load management, monitoring, and alarm annunciation functions of the paralleled engine generator system. The synchronizing and paralleling system shall also include the ability to be isolated or removed from service or delete functional operation/capability.

C. The control logic shall be distributed between the generator synchronizing and paralleling controls and each engine generator such that each engine generator is capable of starting and paralleling to the existing medium voltage switchgear bus, in the event of failure of the generator synchronizing and paralleling controls and receipt of a start signal or other generator system.

D. The master control and display panel shall be a HMI touchscreen panel, or a combination of digital and analog control, monitoring, and alarm devices. The generator synchronizing and paralleling control logic and master control and display panel shall be such that the master controls will continue to function in the event of a master control and display panel failure.

1. The master control and display panel shall indicate the following status information:

26 23 13 - 4

a. Status of utility-source (future capability) and generator-sources.

b. Status of each utility (future) and generator-source circuit breaker, including protective relays if applicable.

c. Status of each engine generator, including start, run, stop, off, automatic operation, manual operation, speed in rotations per minute (RPM), oil pressure, coolant temperature, hours of operation.

2. The master control and display panel shall indicate and trend the following metering information on a per-phase, line-to-line, line-to-neutral, and summary basis as applicable.

a. Instantaneous and average volts, amperes, kilowatts, kilovars, kilovolt-amperes, frequency, and power factor for each utility and generator bus, and for each utility and generator source.

b. Demand amperes, kilowatts, and kilovolt-amperes for each utility and generator bus, and for each utility and generator source.

3. The master control and display panel shall provide the following control functions for each generator.

a. Automatic, manual, start, stop.

4. The master control and display panel shall provide the following system control functions.

a. Automatic, manual, exercise, test with load, and test without load operation.

b. Load management functions that monitor bus loads and automatically or manually control generators to meet system requirements, including prioritization of Essential and Normal

Electrical System loads and groups of loads as shown on the drawings, and operation under failure conditions of one or more engine generators.

c. Password-protected means to alter the system programming.

5. The master control and display panel shall provide the following alarm functions.

a. All alarms annunciated by each engine generator including engine safety operations and indicated alarms.

b. All system alarms.

E. The master control and display panel shall be powered by at least two sources, which may be from engine generator start batteries and/or switchgear station batteries (future).

26 23 13 - 5

F. Interconnecting Communications Protocol and Media: Future Connections -

The generator synchronizing and paralleling controls shall be furnished with customer terminals and points for interconnection to the existing switchgear, engine generators, future automatic transfer switches and the remote annunciator(s by a dedicated CAT5E network. Provide all necessary copper media, raceways, hardware, software, and programming necessary to establish future interconnection between all components//.

All equipment shall share a non-proprietary and open topology and communications protocol.

2.2 REMOTE ANNUNCIATOR PANEL

A. A separate remote annunciator panel is not included in contract.

2.3 PARALLELING OPERATION

A. Emergency Mode:

1. Upon initiation of the automatic start sequence, engine generators shall start. The first engine generator to achieve 90% of nominal voltage and frequency shall be connected to the bus. All loads shall be transferred to the bus upon sensing availability of power on the bus. As the remaining engine generators start, their respective synchronizers shall initiate control of voltage and frequency of the oncoming set with the bus. Upon synchronizing with the bus, the oncoming engine generator shall be paralleled on the bus. Each time an additional engine generator is added to the bus, the remaining loads shall be transferred until all loads are connected to the bus.

The generator synchronizing and paralleling controls shall prevent the automatic transfer of loads to the bus until there is sufficient capacity to carry these loads. Provision shall be made to manually override the load addition circuits for supervised operation.

2. Load management sensing shall be furnished to ensure that sufficient generating capacity is connected to the bus to carry the load. The load management sensing shall also ensure that not more than the required capacity plus a limited reserve is connected to the bus at any time. The system in conjunction with the load management shall ensure maximum efficiency in the utilization of engine generators to ensure maximum fuel economy.

3. Load management sensing shall ensure that the on-line reserve capacity does not fall to less than 10% or exceed more than 110% of a single engine generator. Upon sensing if the connected load exceeds the present limit for an established period of time, the

26 23 13 - 6 next engine generator will be started, synchronized and paralleled.

If upon sensing, the connected load is determined to be less than the preset limit for an established period of time, the last engine generator to be paralleled will be disconnected and shut down. Its controls will be automatically reset so that the engine generator will be ready for next operation.

4. While one engine generator is connected to the bus, and if the connected load exceeds the capacity of the bus, resulting in a decrease in system frequency to 48 Hz or less, load dumping will be initiated to reduce the connected load within the capacity of the bus. Similarly, with increased loading, the remaining engine generator will be signaled to start and be paralleled to the engine generator already connected to the bus, and the load dump signal will be automatically cancelled. Upon restoration of the normal source of power supply, as defined in the generator paralleling controls for an adjustable period of 0 to 30 minutes, the loads shall be transferred back to the normal power source. Subsequently, the engine generator shall be disconnected from the bus, run for an adjustable period of time up to 15 minutes maximum for cool down, and then shut down. All controls associated with operation of the engine generator shall automatically reset for the next automatic operation.

B. Manual Mode: For future operational needs, the engine generators and automatic transfer switch(es) can be operated manually.

C. Exercising Mode: Incorporate controls so as to allow automatic and manual testing of each engine generator and remotely located transfer switch.

D. Utility Peak Demand Reduction Mode:

The system shall include provisions for future addition of control equipment which will operate the standby power system to reduce utility peak demand in the following way: The system shall also include a manual override for local supervisory operations.

1. Upon initiation of an automatic sequence for utility peak demand reduction operation, engine generators shall be started. The first engine generator to achieve 90% of nominal voltage and frequency shall be connected to the bus. The first peak reduction transfer switch shall then be signaled to transfer its load to the bus. As the remaining engine generators start and achieve 90% of nominal

26 23 13 - 7 voltage and frequency, their individual automatic synchronizers shall initiate control of voltage and frequency to bring the oncoming engine generators into synchronism with the bus. Upon achieving synchronism, the oncoming engine generators shall be synchronized and paralleled. As these oncoming engine generators are synchronized and paralleled, the system shall signal additional peak reduction transfer switches to connect their loads to the bus.

2. The system shall prevent load transfer to the bus until there is sufficient capacity to carry the additional loads. Provisions shall be included to manually override the load addition circuits for supervised operation.

3. Upon termination of the utility peak demand reduction operation, the loads shall be retransferred to the normal power source. The engine generators shall be disconnected from the bus, run for a cool down period, and shut down.

4. If while operating in the utility peak demand reduction mode, a normal source of failure occurs at any Essential Electrical System automatic transfer switch, then the peak demand reduction operation shall be terminated. Upon receipt of signal that the normal source has failed, all peak loads shall be shed and the system shall return to Emergency Mode.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Mount generator synchronizing and paralleling controls on steel framing and pnels within the generator control room/area. Provide all wiring and raceways for system installation meeting requirements of this specification and all code requirements. Seal voids around conduit openings with water- and oil-resistant caulking or sealant.

3.2 ACCEPTANCE CHECKS AND TESTS

A. An authorized representative of the generator synchronizing and paralleling controls manufacturer shall technically supervise and participate during all of the factory adjustments and tests. Major adjustments and field tests shall be witnessed by the COR. The manufacturer’s representative shall certify in writing that the equipment has been installed, adjusted, and tested in accordance with the manufacturer’s instructions and recommendations.

B. Perform in accordance with the manufacturer's instructions and recommendations. In addition, include the following:

26 23 13 - 8

1. Visual Inspection and Tests:

a. Compare equipment nameplate data with specifications and approved shop drawings.

b. Inspect physical, electrical, and mechanical condition.

c. Vacuum-clean enclosure interior. Clean enclosure exterior.

d. Verify appropriate equipment grounding.

e. Verify appropriate anchorage and required area clearances.

2. Systems Tests:

a. Verify proper operation of all control, monitoring, trending, and alarm functions.

b. Verify undisrupted operation of the system under conditions of loss of the generator paralleling controls.

c. Test and verify continuity of all interconnecting copper and fiber optic control media.

C. Perform all acceptance checks and tests specified coordinated with medium voltage circuit breaker and engine generator system tests, including functional and protective relaying and alarm tests

3.3 FOLLOW-UP VERIFICATION

A. Upon completion of acceptance checks, settings, and tests, the

Contractor shall demonstrate that the generator synchronizing and paralleling controls are in good operating condition and properly performing the intended function.

3.4 INSTRUCTION

A. Factory training services are not included in contract.

---END SPECIFICATION---