MCAGCC 29 Palms Microgrid
MCAGCC 29 Palms Energy 2014/2015
· Base Power Basics · Power production
– 16.4 MW 2 Cogeneration plants– 8 MW PV systems on line by end FY16– 24.4 MW Total production capacity – Winter peak 15 MW – Summer 26 MW – Working to raise minimum import settings
· Energy Security– Contingency plans for loss of power and water– Electrical grid redundancy– Load reduction capabilities– Critical buildings and infrastructure backup
generators– Cogen plants , PV power production, Grid
upgrades with switches and substation communication
– Microgrid operations central control strategy– EMCS DDC building monitor and control– Leatherneck substation 115KV line upgrade
allows for multiple feeds and redundancy– 7 day backup fuel supply– **Cyber Security **
October
November
December
January
February
March
AprilMay June
July
August
Septem
ber -
2,000,000
4,000,000
6,000,000
8,000,000
10,000,000
12,000,000
14,000,000
KWH Used KWH Cogen
KWH PV
122,204,873
77,986,408
4,945,583
FY 15 Actuals/YrTotal Generation77,449,312 Kwh
Infrastructure
· Public Works Network (PWN)– Fiber communications system
– Designed, Installed and Maintained by Public Works Division
– PWD IT and security requirements– Monitor/Control/Metering
– GE Microgrid controller– 60 motorized switches– 11 Substations with breaker control– 2 Cogeneration plants– 3 Chilled water plants + small
chillers (8500 tons cooling)– Over 50 PV systems 8MW– 250+ building controls– Future Sewage Treatment plant– Future Well field operations
• Cogen plant 1 $16M7.2MW solar turbine Taurus 70Generates 55% of base load 55,000 + MWH/yearCollects 35 MBTU/Hr heat for heating and cooling of 60% of the base.
• Cogen/utility plant 2 - $48M9.2MW/ twin 4.6MW Mercury 50twin turbine for peak following2 - 20 MBTU/hr boilers3- 650 ton Chillers 1 – Electric Centrifugal 2 – AbsorptionExpected generation full year 55,000+ MWH
• PV systems8MW/ 54 locations tie to buildings Size of systems 20-1200 KW
• Battery Energy Storage System654 KW located on 1200 KW system
• Chiller plants (8 Central plants)8500 tons cooling capacity1900 tons absorption cooling
Smart Grid/Microgrid
• DOD OSD effort: ESTCP contract–GE systems identified as the contractor
for install–2 year $2M contract for installation and
testing–Limited scope using existing points
already installed to expand controls–Scope includes
– Controller/server,
– Capacitor bank,
– power factor control
– Battery Energy Storage
–Can be disabled for manual control• MCAGCC systems long range plan parallels
scope –Will combine all systems into a single
control network capable of monitoring, control, and load shedding
– Generation- Automatic function to switch from normal to renewable and island base
– Substation- monitoring, load shedding
• Way ahead–EMCS Fiber network must be upgraded to a
hybrid Fiber/RF configuration Completed–New smart switches for overlapping network
Completed –New network for substations/switches
Completed–Power factor controls on Cogen 1
Completed–Project P1232 - New infrastructure upgrades
for whole base island mode FY 16
• Microgrid Controller project- Tested for initial programming- Base had multiple changes - Updating program with P1232
project to incorporate all generation and electrical grid changes
• Base currently has one of the largest DOD type 2B Microgrid system using Cogeneration
- Current operation automatically picks up about 10MW of load in utility loss and sheds as necessary
Lessons Learning and Learned
• Keep it simple– Simple design– Simple operations– Redundancy
• Personnel– Training– Technical – Supervision
• Maintenance– Contracts support
• Communications• Support tools and equipment• Cyber security!!!!!
• Installation of equipment– MILCON– Local funding
• Keep it simple– Ongoing process to keep
• Maintenance– No M no work!
• Communications– Critical for functionality
• Personnel– Experience counts!– No training– IT required
• Support tools• Involve local utilities!• Cogeneration makes it larger and
easier
Microgrid Basic Design
Microgrid Features• Bulk Grid Connected or Islanded• Tri-Gen System• CHP, Diesel & PV• Building Loads as a Resource • Wireless local area network• Fiber to substations• Load as a Resource• Control loads substation/switch
level
Cogen Plant 1 – 7MW
Building Loads/PV
• Next phase combine Cogen plants into a basewide system capable of 24 MW. P1232
Building Loads/PV
Cogen plant 2 - 8MW
Co-Gen PLC Microgrid Controller
Ethernet Switch RF AntennaeBuilding Loads
2 MW PV
SCE Grid Tie
LTCOcotillo Switching Station Protection / Metering Relay
ExistingFiber Network
Fiber Network
MDS 3650Radio
13 Substations
Islanded Loads/PV 10 MW
Building Loads/PV
1.2 MW PV
Building Loads/PV Building Loads/PV
Islanded Loads/PV 4 MW
• Base has islanded 14 Hrs on one Cogen plant in winter Manual ops