Upload
others
View
4
Download
0
Embed Size (px)
Citation preview
Example Studies Using Hybrid Simulation
2017 IEEE PES General Meeting/ Analytics Methods for Power Systems Committee Panel Session
Panel Session Title: “Challenges and solutions of interfacing techniques for EMT/TSA hybrid simulation ‐ Industry perspectives”
July 20, 2017
Garth IrwinChaminda AmarasingheElectranix Corporation
1
Electranix Corporation
Background and ToolsSimulation Tools Used:• PSCAD (EMT)• PSS/E (TS)• E‐TRAN (Translation Tool)• “E‐TRAN Plus for PSS/E” (Hybrid Co‐Simulation)• “E‐TRAN Plus for PSCAD” EMT Parallel Processing
2
Electranix Corporation
3
Electranix Corporation
Hybrid Simulation• Simultaneous runs using both TSA and EMT
tools (EMT models embedded in transient stability simulations)
• Interface models on both sides, exchange information.
• EMT models (to represent offshore VSC multi‐terminal grid and wind turbine models etc…)
• TS models (to represent the full AC system, including all modes of oscillation from nearby machines)
• Same communication library (between cpus of computers on a LAN)
• Plotting and control by a central GUI/operator
G
Transient Stability Model
EMT ModelEMT Model
G
CPU #1 CPU #2
TCP/IP Communication
G
Transient Stability Model
G
CPU #3CPU #1
Large System Large System
Pure Transient Stability Model
Hybrid EMT/TS Model
Steps to Create a Hybrid Simulation1. Start with a working TS case (loadflow and
dynamic models)2. Identify the “kept network” (ie what is to be
modeled in EMT – right side of the example)• Perform harmonic impedance scans for successively
larger cases (adding shunt caps and long lines etc.. until frequency response is accurate)
• Can include machine busses (TS machine data is also translated into EMT)
• Add busses of complex models which are to be represented with detailed EMT models
• A general list of busses (that do not have to be interconnected).
3. Translation tool will generate:• EMT case (adds neteq of TS portion)• Python script for TS (adds neteq of EMT portion)
4. Run Python script in TS to generate hybrid case5. Run EMT Case (and auto‐start TS case) or
modify TS case to auto‐start EMT case)
Electranix Corporation
4
TS Hybrid Portion
Original TS Case
Multi-port equivalent
EMT Hybrid Portion
Multi-port equivalent
Hybrid EMT-TS Simulation
Kept Network
Simultaneous runs using both TS and EMT.• Interface models on both sides, exchange of
terminal information.• Every component is only modeled once (in
either EMT or TS).• Instantaneous response (faults etc.) in systems
separated through interfaces is correct due to multi‐port off‐diagonal LDU derived equivalents (unlike simple source equivalent interfaces)!
Also Includes:• Transfer of signals from EMT to/from TS• Plotting and control by a central GUI/operator
(and auto‐start of other cases)• Support for Snapshots• Support for any number of boundary busses,
any combination of multiple TS, multiple EMT, parallel TS or parallel EMT simulations.
Multi-port equivalent
Multi-port equivalent
EMT model
TS model
Electranix Corporation
5
Combined TS-EMT Hybrid Simulation
6
Electranix Corporation
EMT Parallel Processing• Traveling wave transmission line models have
natural time delays.• Simulations can be broken up at Bergeron
transmission line boundaries or at Scaling Transformers.
• Results on 1 CPU or multiple CPUs are identical.• Multiple cores on one computer, or multiple
computers across a LAN can be used.• Auto‐launch of one process from another used to
make parallel processing easy to use • Any number of processors, different time steps,
program versions or compilers.
TCP/IP Communication
CPU #1
Single CPUEMT Model
Complex System
Complex System
Complex System
Complex System
EMT Model
ParallelizedEMT Model
Complex System
Complex System
Complex System
Complex System
EMT Model
CPU #1
EMT Model
CPU #2
EMT Model
CPU #4
EMT Model
CPU #3
Atlantic Wind Studies7
Electranix Corporation
CPU 11
CPU 12
CPU 10
CPU 9
CPU 8
CPU 4
CPU 5
CPU 6
CPU 7
CPU 1
CPU 3
CPU 2
TS case with 3 interfacing points
HMI
CPU 13
CPU 14
Electrical signals
To all CPUsTo all CPUs
Communication signals
4 Terminal VSC/HVDC Link ‐ Hybrid and Parallel Computing Using 9 Processors
Hybrid Interface from EMT to Transient Stability Parallel Processing EMT Detailed Model
HMI/Control
Electranix Corporation
8
9
Electranix Corporation
HVDC/VSC StudiesCompare 2nd LCC Pole to VSC Pole
MainlandTransient
Stability V32
Island Transient
Stability V29
EMT Detailed HVDC Models
(Monopole and Bipole LCC)
EMT Detailed VSC Models
(Monopole)
MISO HVDC Concept (by Dale Osborn)
Electranix Corporation
10
Large System Study Example11
Electranix Corporation
12
Electranix Corporation
Multi‐Vendor Simulation Setup
Wind #1
LAN/Switch
Wind #2 VSC #1 VSC #2 VSC #3
Private VPN interfaces (allows manufacturers to remotely participate and update models)
Simulation Manager(Public Area)
Central Control Computer- Start cases (on all computers)- Stop, pause, take snapshots…- Plot quantities from all cases- Apply faults anywhere in EMT or TS- Only user who has share access to run manufacturer’s cases on its computer- TS case be on this or on another dedicated computer