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Paralleling Switchgear (PSG) GE Zenith Capabilities - Overview.

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Presentation on theme: "Paralleling Switchgear (PSG) GE Zenith Capabilities - Overview."— Presentation transcript:

1 Paralleling Switchgear (PSG) GE Zenith Capabilities - Overview

2 2 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training GE Zenith Controls – Paralleling Switchgear (PSG) First system built in 1975 Currently ~ 150 systems/year Currently building project #1280

3 3 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training What is a Paralleling Switchgear System (PSG) ? Primary Source (Normally Energized) Controls and switchgear, acting as a system, to manage & distribute emergency power and/or reduce energy costs thru intelligent use of local generation Genset #1 Paralleling Breaker Distribution Breakers Service Entrance Breaker ATS Exit Critical Loads Emergency System (Normally De- energized) Normal System (Normally Energized) Genset #2 Genset #3 Utility Breaker Paralleling Bus

4 4 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Increased Backup Power Supply Capacity –When backup supply needs are > capacity 1 Gen Backup Supply Redundancy –Provides “N + 1,2,etc” redundancy. Critical loads not reliant on only 1 Genset Operational Flexibility –Ability to switch loads between multiple sources (including Gensets) for maintenance & test without interrupting power to the loads Reduced Energy Bills –Turn on-site generation capability into an money- saving Asset, with start/stop/loading intelligence for reduced energy & demand charges. Key Benefits of PSG?

5 5 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Single Genset – Single Utility Soft Load Transfer Switch For small facility standby & distributed generation Multiple-Genset Standby For Life Safety or Business Critical standby power to selected high-priority loads. Utility Paralleling, Peak Shaving Paralleling of Generator(s) and Utility supplies for backup of entire facility and reduced energy charges. Mission Critical Standby Turning on-site generation capability into an Asset, with start/stop/loading intelligence for reduced energy & demand charges. Typical Systems built by GE Zenith Controls

6 Examples of Typical GE Zenith Systems

7 Type 1 – Single Gen, Single Utility Soft Load Transfer Switch

8 8 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Engine Generator Speed Control Utility Supply Standby Generator Building Load GCBMCB Single Gen, Single Utility Architecture Building Dist. System Utility Supply Breaker Gen Supply Breaker (N/O) (N/C) Soft Load Transfer Switch

9 9 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training GCBMCB Utility/Primary Supply Genset/Backup Supply Critical Load Mode: Gen Status: Utility Status: Normal OFF Energized. kW Varies. kW = Facility Load GCBMCB Standby Running. kW Varies. kW = Facility Load Failed/Off. Soft Re-Transfer To Utility Running. Initial kW = Facility Load Final kW= ~10% Rated Running. Initial kW= 0kW Final kW= Facility Load kW Sequences of Operation – Softload Transfer Switch

10 10 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training GCBMCB Mode: Gen Status: Utility Status: Base Load Mode Energized. kW Varies. kW = Facility Load in excess Of Fixed Gen kW Running. kW Fixed. kW = Preset/ Fixed (typically % Genset Capacity) Import (Export) Mode kW Level Time kW Level Time kW Level Time kW Energized. kW Fixed. kW = Fixed Import or Export Level (kW) Running. kW Varies. kW = Facility Load in excess Of Import Setpoint GCBMCB kW Level Time kW Level Time kW Level Time kW Baseload Setpoint Import Setpoint Sequences of Operation – Softload Transfer Switch

11 11 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Generator & Utility Protection via: GE Multilin G30 ™ Peak Shaving Control via: Woodward GCP-32 ™ Peak Shaving Controller communications via: Woodward GW4 ™ (Modbus) Plus: Manual Control Switches Safety Lockout/86 Relay LED Status Annunciation Control Panel – Softload Transfer Switch LAN/ WAN Local Monitoring and Alarm transmission via: Enervista Viewpoint Monitoring ™

12 12 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training EngineGenerator 3 CT’s V ( PT’S ) 3 CT’S Utility Supply Critical Load Closed Transition ATS or 5-cycle CB’s GE Multilin G30 Relay GCBMCB Meter #1: Generator Source Metering (GM) Meter #2: Utility Source Metering (UM) Meter #1: Utility Meter (UM) : Utility Supply kW, Energy, etc. Peak Shaving Savings = (LM * Rate Structure) – (UM * Rate Structure) Site Level: Peak Shave System Metering Meter #2: Generator Meter (GM) : Generator Supply kW, Energy, etc. Virtual Meter #1: Load Meter (LM = GM + UM) {Developed in GE Aggregator ™} Genset Supply

13 13 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Peak Shave Savings Reports – GE Aggregator™ Setup Utility billing structure Setup custom site bills (showing usage or savings) Enter Begin & End dates & create/ view bills Export reports for printing, sending, or filing 4

14 14 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Local & Remote Access to Reports Site Level Site Peak Shaving Control Systems w/ local GE Enervista Viewpoint™ Unlimited # Sites LEVEL 2: Regional Energy Aggregator™ (REA) (1 Server/~100 Sites) LEVEL 3: Enterprise Energy Aggregator™ (EEA) (Qty. 1) LEVEL 4: Enterprise Energy Aggregator™ Viewers (Up to 5 concurrent users) GE Zenith ZTSSL LAN or VPN Up to ~ 100 Sites per Aggregator Est. (6) REA’s for full 630-site configuration … Web Serv er Local data-logging by Multilin G30’s Upload Data-Logs “Aggregates”, or combines date from from the (6) REA servers. View reports from EEA. GE Zenith ZTSSL

15 15 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training GE Zenith Design Recommendations True PQ Metering of Both Sources, including Waveform and Events Capture – for quick diagnosis of system events and outages Utility grade protective relaying for equipment and personnel safety - – due to extended nature of utility paralleling. Open protocol Modbus communications for easy facility integration Plug-and-Play PC Monitoring for low cost, but effective system monitoring and alarm management, including automatic generation of any/all alarm events Key-lockable Control Switches for safety Automatic report generation for: Utility and Generator Energy supply (kWH), Demand (kW), and Peak Shave savings (based on site-specific utility rate structure).

16 Type 2 – Multiple Genset Standby

17 17 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Genset #1 ATS Genset #2 Genset #3 Paralleling Bus Multiple Genset Standby Typical Architecture Primary Distribution Secondary Distribution Emergency Panelboard Exit Emergency Loads

18 18 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Genset #1 ATS Genset #2 Typical Sequence of Operation for PSG – On loss of Utility 1 Utility Supply Fails 2 ATS Send start signal to all Gens 3 All Gens start. PSG control system monitors. 1 st Gen at rated Volts & Freq is connected to the Paralleling Bus. Paralleling Bus 5 PSG Controls synchronize 2 nd and 3 rd Gensets to Bus (speed and volts bias to Gen Gov & AVR), and close CB’s at point of synchonism (see above). 6 PSG Controls remove xfer inhibits on lower priority ATS to permit connection to Gen system. PSG Controls shed low priority ATS if Gens are overloaded. PSG permits manual or auto re- connect. 7 X Synchronous Conditions 1 1) Volts within +/- 10% 1 2) Phase within +/- 20 Deg 2 PSG Controls shed low priority ATS if Gens are overloaded. PSG permits manual or auto re-connect. 8 Priority 1 ATS Xfer to Gens. PSG inhibits xfer of lower priority ATS to prevent Gen overload. 4

19 19 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Typical Sequence of Operation for PSG – On Return of Utility 1 Utility Supply Returns 2 ATS’s retransfer loads to Utility, after preset time delays, and remote start commands. 3 When last ATS removes start command, PSG Controls open all Gen CB’s 4 PSG controls hold start signal to all Gens to permit cooldown at no load. 5 After cooldown timer expires, PSG controls remove start signals to Gensets. 6 Gensets shut down and remain ready for next utility outage. Genset #1 ATS Genset #2 Paralleling Bus

20 20 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Typical GE Zenith Configuration Other key items (inside) 1.GE Fanuc PLC (Single or Redundant) 2.Flexible Woodward SPMA (sync) and LSM (load Sharing) modules 3.Hardwired backup switches for load add/shed 4.Backup 24 VDC power supply for system ride-thru on DC control power problems Highly visible, LED Annunciation for instant viewing and viewing from distance Full manual paralleling control switches (Auto/Manual, Sync Switch, CB Open/close, Synchroscope/V/Hz meters on swing panel) Generator Analog Metering for best viewing of Gen & Utility stability Generator Protective Relay (typically Utility grade for MV, Industrial grade for LV) Totalizing Power Quality Meter (PQM) with waveform & diagnostic capability Simple Operator Interface Panel (OIP) for setup of time delays, load add/shed, etc. Key Items – GE Recommendation

21 Type 3 – Utility Paralleling, Peak Shaving

22 22 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Genset Breakers Utility Supply Utility Paralleling, Peak Shaving Facility Loads Feeder Breakers Typical Architecture 1.Generators sized to high% of total facility loads 2.Utility CB and Gen CB’s act as a “Transfer Switch”, switching 2 sources of power to main bus in event of Utility outage. 3.Re-transfer to utility either Open or Closed Transition (typically closed) 4.Main bus is fed from 2 sources power – utility supply (primary) and generator supply (backup) 5.Bus AIC/Short circuit rating sized to capacity of utility + all Gensets. Main Bus

23 23 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Utility Paralleling - Base Loading GCB Utility Supply Load kW Level Time Gen kW Level Time Utility kW Level Time kW Baseload Setpoint GCB kW Genset Base Load: 1 Utility Supply Available 2 When pre-programmed conditions for Genset starting satisfied (Utility load >x, time of day, etc) PSG Controls start Gensets, synchonize to utility supply, and close Gen CB’s. 3 PSG system controls kW on Gensets to fixed, base load level. 4 As system load varies, Utility supply kW varies to supply the load. 5 When Gen supply no longer needed, PSG Controls slowly ramp load back to utility supply and open Gen CB;s at near no-load. 5 PSG controls cooldown and shutdown Gensets. kW

24 24 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Utility Paralleling - Import/Export GCB MCB Load kW Level Time Gen kW Level Time Utility kW Level Time kW Baseload Setpoint GCB kW Utility Import/Export: 1 Utility Supply Available 2 When pre-programmed conditions for Genset starting satisfied (Utility load >x, time of day, etc) PSG Controls start Gensets, synchonize to utility supply, and close Gen CB’s. 3 PSG system controls kW on Gensets to maintain fixed kW value on Utility supply (import or export). 4 As system load varies, Genset supply kW varies to supply the load. 5 When Gen supply no longer needed, PSG Controls slowly ramp load back to utility supply and open Gen CB;s at near no-load. 5 PSG controls cooldown and shutdown Gensets.

25 25 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Typical GE Zenith Configuration Other key items (inside) 1.GE Fanuc PLC (Single or Redundant) 2.Flexible Woodward SPMA (sync) and LSM (load Sharing) modules 3.Hardwired backup switches for load add/shed 4.Backup 24 VDC power supply for system ride-thru on DC control power problems Highly visible, LED Annunciation for instant viewing and viewing from distance Full manual paralleling control switches (Auto/Manual, Sync Switch, CB Open/close, Synchroscope/V/Hz meters on swing panel) Full, Open transition, manual control of Utility CB Generator Analog Metering for best viewing of Gen & Utility stability Generator Protective Relay (Utility grade) Totalizing Power Quality Meter (PQM) with waveform & diagnostic capability Industrial Computer with graphical 1-lines, load controls, trending, alarm management. Key Items – GE Recommendation

26 Type 4 – Mission Critical Standby

27 27 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Mission Critical Standby Typical Architecture – Tier 4 Data Center System ‘A’ Gen Bus System ‘B’ Gen Bus System ‘A’ Utility Bus Unit Subs Util A Gen A Unit Subs Gen B Util B Unit Subs Util A Gen B Unit Subs Gen A Util B System ‘B’ Utility Bus 1.Complete system redundancy – Tier 4 classification 2.100% Backup Generator N+1 capacity 3.2 x Independent Gen Paralleling systems, each capable of 100% backup & control of other system (GE Zenith-Fanuc unique design for Quadruple redundancy!

28 28 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Typical GE Zenith Configuration Full Manual backup, visible LEDs, Utility Grade relaying, PQ Metering Synchronized-backup PLC each Gen System (2 x PLC each Gen system) Gen System Graphical Display, + large monitor each system for display downstream load status Each System Master control capable backup of other system Key Items – GE Recommendation Gen ‘A’ Gen ‘B’ Util ‘B’ Util ‘A

29 29 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training ZDEC 2020

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