RT15 Berkeley | OPAL-RT Solutions for Microgrid Applications

OPAL-RT Solution For Micro-grid

Applications Real Time Simulation

OPAL-RT Technologies

OPAL-RT Solution For Micro-grid Applications

• Applications Description

• Challenges Overcome the Real time simulators limitation toward large power systems simulation

Ensure the accuracy of the power electronics circuits simulation

• OPAL-RT Solution for Large scale power systems simulation State Space Nodal method (SSN)

• OPAL-RT Solution for power electronics Medium and low speed controllers applications (F< 10 kHz) : RT-Event/RT-Drive

High speed controllers applications (F> 10 kHz until 100kHz) : EFPGASim (eHS)

• Live Demo

MicroGrid

615 nodes distribution system with 124 R-Loads

Challenges

• Power distribution system with very shorts lines:

No intrinsic elements (DPL) to decouple the model for multi-processors simulation.

Large Time step over 300us to simulate the system in one core (if possible): Low accuracy Risks of numerical instability Memory problem when increasing the quantity of elements such as breakers

Traditional method for model decoupling existing in the market:

using some artificial components: delays and artificial capacitors:

System behavior affected & possible instability due to the delays

Limitation toward large power systems simulation

Challenges

Traditional power electronics simulation tools: No interpolation

Results are accurate when the time step is very small (less than 1 us) or using a variable time step solver

for offline simulation only

Large simulation sampling time for Microgrid applications:

Large time step Results inaccuracy and signals distortion due to misfiring

Accuracy of the power electronics circuits simulation

OPAL-RT Solution OPAL-RT SSN solution for power distribution system decoupling :

Transparency toward system behavior : no delay, no artificial capacitors

Flexibility in terms of processors assignation: a group or set of groups can be assigned to specific available core easily using RT-LAB.

Possibility to add three to four 3-phase breakers per group without affecting the real time simulation.

OPAL-RT Solution

Medium and low speed controllers applications (F< 10 kHz) eMEGASIM: RT-Event/RT-Drive

High speed controllers applications (F> 10 kHz) EFPGASim (eHS)

OPAL-RT solution for power electronics circuit simulation:

• Power electronics circuit simulated with time steps below 1 μs

• Allow very high switching frequencies (10kHz to 100kHz) for semiconductor technology

Live Demo

Smart Grid

Application 2

This model simulates a smart-grid that combines three benchmark models of IEEE and SimPowerSystems in the same application:

Model 1: Sub-synchronous resonance (SSR) using a Steam Turbine on series-compensated network.

Model 2: Solar Panel connected to grid

Model 3: 9 MW Wind farm DFIG based connected to grid

Application 2:model1 Steady State

Application 2: model1 3-ph fault

Application 2: model2 open loop

Application 2: model2 closed loop1

Application 2: model2 closed loop2

Application 2: model3 Steady state

Application 2: model3 3-ph fault1

Application 2: model3 3-ph fault2

Application 2: model3 3-ph fault3

Application 2: model3 3-ph fault

Application 2: Real Time Performance

CPUs

Descriptions

Components Content Model Calculation

Time

Minimum

time step

CPU 1: (20 µs)PV system + Steam

turbine system 8 us 12 us

CPU 2: (20us) DFIG System 9 us 12 us

Processor Allocation and Real-Time Performance

Live Demo