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