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ENGRO POLYMER & CHEMICALS LTD


UNINTERRUPTIBLE POWER
     SUPPLY (UPS)
WHAT IS UPS ?


   UPS maintains a continuous supply of electric power to connected
equipment by supplying power from a se...
WHY UPS?


  DEG powers the emergency loads of the plant & UPS in case of power
failure.UPS powers control system during D...
UPS CHARACTERISTICS
UPS @

             Battery location : Battery room in CCR



             UPS location :   Cabinet room in CCR


        ...
CHARACTERISTICS

                             Redundant


     125% overload for 10 min, 150% for 1 min and 250% for 20ms....
CHARACTERISTICS

 Redundant equipment in separate cubicles to allow maintenance without
                            interr...
OPERATING MODES
NORMAL MODE

                    bypass

   Bypass
   supply
                        Static
                        switch...
BACKUP MODE

                    bypass

   Bypass
   supply
                        Static
                        switch...
BYPASS MODE

                    bypass

   Bypass
   supply
                        Static
                        switch...
MAINTENANCE MODE

                    bypass

   Bypass
   supply
                        Static
                        s...
TESTS
•Full load heat soak run            •Measurement of maximum input
•Overload tests                     current
•Step ...
UPS LOADS
POWER TO UPS


                               PVC-II
               PVC-II S/S     Mastery IP
  General                   ...
MAIN DISTRIBUTON

         UPS consumers



           AC (DCS )



            DC (24V to field
             instruments)
UPS AC LOAD


              • Operator workstation
              • Marshalling cabinet
              • Emergency panel
   ...
UPS FIELD DISTRIBUTION


               • Mass flow meters
               • magnetic flow meters
     UPS       •
        ...
FIELD DISTRIBUTION

               Field instrument area
                        wise



                                 ...
UNINTERRUPTIBLE DC POWER @
DC POWER CHARACTERISTICS

  A UPS designed for powering DC equipment is very similar to an online
          UPS, except th...
DCP LOAD


                                       DCP installed in GSS




                                               ...
TYPES & COMPONENTS
Voltage
                     sag
     Harmonic                   Voltage
     distortion                  spike




      ...
OFFLINE OR STANDBY UPS
LINE INTERACTIVE UPS
ONLINE UPS
BATTERY
•Storage batteries are the energy source for UPS systems during
a power outage. UPS systems demand a high discharg...
STATIC TRANSFER SWTICH

•UPS can maintain supply to load either from the UPS Inverter
output or from the mains (bypass) su...
STATIC TRANSFER SWTICH
STATIC TRANSFER SWTICH

During normal operation, with the inverter supplying the load,
SCRs 3 and 4 are triggered and SCRs...
THANKYOU!
UPS and DC power training Presentation
UPS and DC power training Presentation
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UPS and DC power training Presentation

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This is the presentation i gave to engro polymer employees as a part of my internship work. It includes types of UPS, how they are distributed and located physically, there redundancy working and main power problems a ups caters.

UPS and DC power training Presentation

  1. 1. ENGRO POLYMER & CHEMICALS LTD UNINTERRUPTIBLE POWER SUPPLY (UPS)
  2. 2. WHAT IS UPS ? UPS maintains a continuous supply of electric power to connected equipment by supplying power from a separate source when utility power is not available. It differs from an auxiliary power supply or standby generator, which does not provide instant protection from a momentary power interruption
  3. 3. WHY UPS? DEG powers the emergency loads of the plant & UPS in case of power failure.UPS powers control system during DEG starting so that there is no interruption during power failure. Incase of DEG failure, UPS is used to bring the plant process to safe shut down. It mainly turns off the critical valves.
  4. 4. UPS CHARACTERISTICS
  5. 5. UPS @ Battery location : Battery room in CCR UPS location : Cabinet room in CCR Backup time: 30 min Charging time : 8 hours Quantity: Two ( 48 KW for UL-II, 15KW for PVC-II)
  6. 6. CHARACTERISTICS Redundant 125% overload for 10 min, 150% for 1 min and 250% for 20ms. Two battery units. 48KW UPS has 320 battery units(200AH each) while 16KW has 400 units each(50AH). Voltage inspection range : -15% to +30% Local and remote indication/alarm of any failure
  7. 7. CHARACTERISTICS Redundant equipment in separate cubicles to allow maintenance without interruption. Battery connection to UPS is through an isolating switch in UPS cabinet. Cooling : low velocity forced air (redundant fans) Maintenance bypass s/w is in separate enclosure from ups cabinet, so ups can be completely removed. Power : EMCC/MCC buses
  8. 8. OPERATING MODES
  9. 9. NORMAL MODE bypass Bypass supply Static switch Supply Rectifier Inverter load U P S Battery
  10. 10. BACKUP MODE bypass Bypass supply Static switch Supply Rectifier Inverter load U P S Battery
  11. 11. BYPASS MODE bypass Bypass supply Static switch Supply Rectifier Inverter load U P S Battery
  12. 12. MAINTENANCE MODE bypass Bypass supply Static switch Supply Rectifier Inverter load U P S Battery
  13. 13. TESTS •Full load heat soak run •Measurement of maximum input •Overload tests current •Step Load application •Harmonic distortion •Steady state regulation •Non linear load simulation •Charger and inverter current •Protection co-ordination limiting •functional, alarm and tripping •Input inrush current measurement check •Load changeover •Operation of all equipment.
  14. 14. UPS LOADS
  15. 15. POWER TO UPS PVC-II PVC-II S/S Mastery IP General 16KW substation UT-II Delphys MP Elite 48KW CCR
  16. 16. MAIN DISTRIBUTON UPS consumers AC (DCS ) DC (24V to field instruments)
  17. 17. UPS AC LOAD • Operator workstation • Marshalling cabinet • Emergency panel Power • • Server Color and B/W to DCS printers • Local control box • Instrument dc power DB
  18. 18. UPS FIELD DISTRIBUTION • Mass flow meters • magnetic flow meters UPS • • Ultra sonic meters Cod analyzers field • • PH analyzers HCL concentration supply • Weighing instruments • Solenoid valve
  19. 19. FIELD DISTRIBUTION Field instrument area wise Dematerialized Feedstock water unit (6100) (4600) Polymerizer Cooling water (6200) unit (4400) Drying unit(6300)
  20. 20. UNINTERRUPTIBLE DC POWER @
  21. 21. DC POWER CHARACTERISTICS A UPS designed for powering DC equipment is very similar to an online UPS, except that it does not need an output inverter. DC power is from a separate UPS without an inverter. It powers the MV switch gear control of General substation, PVC-II substation and EDCVCM substation. One DCP is at General Substation (30 KW) and other smaller DCP is at PVC- II Substation (4KW) next to DEG room.
  22. 22. DCP LOAD DCP installed in GSS STG lube Power for Control protection Power for switch on oil pump DEG GSS Bus- GSS Bus- EDC/VCM EDC/VCM A, Bus-B, CCR DC- A, Bus-B, Bus-I, Bus- Bus-I, Bus- Bus-C, DB Bus-C, II II EMEC Bus EMEC Bus
  23. 23. TYPES & COMPONENTS
  24. 24. Voltage sag Harmonic Voltage distortion spike POWER Under- Switching voltage transient PROBLEMS (brownout) Frequency Over- variation voltage Line noise
  25. 25. OFFLINE OR STANDBY UPS
  26. 26. LINE INTERACTIVE UPS
  27. 27. ONLINE UPS
  28. 28. BATTERY •Storage batteries are the energy source for UPS systems during a power outage. UPS systems demand a high discharge rate for a relatively short time at a constant power and require relatively good regulation of output voltage.UPS storage batteries are made up of a string of series-connected cells to achieve the voltage in the range between 48-400V. •The two major categories of storage batteries used in UPS are nickel-cadmium (NiCd) and lead acid. The lead-acid battery is one of the most inexpensive, most reliable and most widely used storage batteries. The NiCd batteries have a much greater cycle life than the lead-acid type, but they cost about 4-6 times more than lead-acid batteries. •For a given battery capacity, a NiCd battery is smaller and lighter than a comparable lead-acid battery
  29. 29. STATIC TRANSFER SWTICH •UPS can maintain supply to load either from the UPS Inverter output or from the mains (bypass) supply. •The static switch of an on-line UPS has two operational states, ‘on UPS’ (the normal condition) and ‘on bypass’. In both cases it provides a very fast transfer between the inverter output and the bypass. The decision is made by the static switch’s own and/or the UPS control logic which continually monitors the bypass (mains) and inverter voltages. The control logic typically controls the phase and frequency of the UPS inverter(s) to ensure that the bypass and inverter voltages are in phase (synchronised) with each other. Bi-directional, break-free transfer between the two supply sources is only possible when the bypass and the inverter are ‘synchronised’.
  30. 30. STATIC TRANSFER SWTICH
  31. 31. STATIC TRANSFER SWTICH During normal operation, with the inverter supplying the load, SCRs 3 and 4 are triggered and SCRs 1 and 2 are not triggered. In the event of an inverter supply problem the static switch monitoring circuitry would identify it and decide to transfer load. It stops triggering SCRs 3 & 4 and starts triggering SCR 1 and 2. Once an SCR is triggered it continues to conduct until the voltage across it is zero. By triggering SCRs 1 and 2 while SCRs 3 and 4 are still conducting, the bypass and inverter are paralleled for a short time. Such short term paralleling ensures a break-free transfer between the two supplies and it is for this reason that the two supplies must be synchronized before the transfer can take place. If the transfer was allowed regardless of the synchronization status of the two supplies then the load would almost certainly be subjected to a power disturbance.
  32. 32. THANKYOU!

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