OPSC CIMExcel Software Inc. Slide 1
Optimal Power System Control (OPSC)
Hydroelectric
Fossil Biomass/Solid Waste/Cogeneration
NuclearWind
Combined Cycle Gas Turbine
for improved system stability, optimal AGC performance, and improved tie-line control,in interconnected or island operating mode (continental, area, sub-area).
CIMExcel Software Inc. Slide 2
Power System Dynamics Model
The ith area is connected to the jth area by the kth tie-line (m areas and n tie-lines).
Mi d/dt ∆ωi = Gi - D0i - Di ∆ωi - Ei
∆ωi = ωi - ωset
Ei = ∑k Tk ( kth tie-line connected to the ith area )
get Mi and Di from a major disturbance.
Tie-line Power Flows:
A* S = G - D0 where A* is the inter-area connection matrix (m x n).
S = A-1(G - D0) where A is a square matrix (decomposition - idle or non-scheduled tie-line flows).
τ d/dt T = S - T
OPSC CIMExcel Software Inc. Slide 3
OPSC – Discrete-time Model Reference Control for AGC
P1set(j)
ISO RealtimeEconomic
Load Allocation
ωG(j)
ωG set
OPSCAlgorithm
RealtimeDemand,Import, Export
~ 10 seconds Filter - Sampler
ωG(t)
Optimal AGC LoadAllocation Pmset(j)
Piset(j)PS(j)
ISORealtimePricing
Pm+1(k)
Pm+n(k)
Pl(k)
∑ Pl(k)
l = m+1
l = m+n
+
-
PAGC(j)
~ 5 minutes
pu powersetpoints for participating
units
Time-of-dayScheduling and
Spinning Reserve
pu power for non-participating
units
APPCpower mode
Pi(j)
Spinning Reserve
Optimization Modes• uniform• weighted• efficiency• weighted-efficiency
Filter - Sampler
Eset net export
(inter-area contracts)
Enet export(t)
Enet export(j)
Filter - Sampler
OPSC CIMExcel Software Inc. Slide 4
Optimal AGC Load Allocation – NERC Sub-Area
0123456789
101112131415161718192021222324252627282930313233343536373839404142434445
0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000
AGC (MW)
Par
tici
pan
t U
nit
OPSC CIMExcel Software Inc. Slide 5
OPSC Discrete-time Model Reference Control - AGC Off
OPSC CIMExcel Software Inc. Slide 6
OPSC Discrete-time Model Reference Control - AGC On(Hydroelectric on AGC – participating units in efficiency optimization mode)
OPSC CIMExcel Software Inc. Slide 7
Optimal AGC Load Allocation – Efficiency Mode
OPSC CIMExcel Software Inc. Slide 8
OPSC Discrete-time Model Reference Control - AGC On - Export Trip / Recovery
OPSC CIMExcel Software Inc. Slide 9
OPSC Discrete-time Model Reference Control - AGC On - Import Trip / Recovery
CIMExcel Software Inc. Slide 10
Optimal Power System Control – NERC Areas
Tie-lines
CIMExcel Software Inc. Slide 11
Optimal Power System Control Tie-line and Area Export Schedule
CIMExcel Software Inc. Slide 12
Optimal Power System Control – NERC Areas
CIMExcel Software Inc. Slide 13
Optimal Power System Control – NERC Tie-lines
CIMExcel Software Inc. Slide 14
Advanced Power Plant Control (APPC)
Hydroelectric
Fossil Biomass/Solid Waste/Cogeneration
Nuclear Wind
Combined Cycle Gas Turbine
for improved stability and improved AGC performance in interconnected or island operating modeusing continuous and discrete time non-linear model reference control technology.
• Hydraulic Turbine Governor• (Kaplan) Pitch Optimization • Multi-Turbine Optimization
• Steam Turbine Governor• Boiler Pressure and Mass• Reactor Power• PWR, BWR, Areva, CANDU, ACR
• Steam Turbine Governor• Boiler Pressure and Mass• Superheater Temperature• Combustion Control• Burner Management
• Steam Turbine Governor• Boiler Pressure and Mass• Multi-Fuel Combustion• Multi-Valve Turbine Flow• Multi-Steam Header• Cogeneration Optimization
• Steam Turbine Governor• Boiler Pressure and Mass• Combustor Control• Combined Power
• Blade Pitch • Multi-Turbine Optimization