Example Studies Using Hybrid Simulation

Transcription

1 1 Example Studies Using Hybrid Simulation 2017 IEEE PES General Meeting/ Analytics Methods for Power s Committee Panel Session Panel Session Title: Challenges and solutions of interfacing techniques for EMT/TSA hybrid simulation Industry perspectives July 20, 2017 Garth Irwin Chaminda Amarasinghe

2 2 Background and Tools Simulation 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

3 3 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 Large Transient Stability Model CPU #1 Pure Transient Stability Model G CPU #1 CPU #2 G G TCP/IP Communication Large Transient Stability Model CPU #3 Hybrid EMT/TS Model

4 4 Steps to Create a Hybrid Simulation 1. 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 case 5. Run EMT Case (and auto start TS case) or modify TS case to auto start EMT case) Multi-port equivalent Original TS Case EMT Hybrid Portion TS Hybrid Portion Hybrid EMT-TS Simulation Kept Network Multi-port equivalent

5 5 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 TS model EMT model Multi-port equivalent Combined TS-EMT Hybrid Simulation

6 6 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. CPU #1 Single CPU CPU #1 CPU #3 TCP/IP Communication Parallelized CPU #2 CPU #4

7 7 Atlantic Wind Studies HMI CPU 14 To all CPUs To all CPUs CPU 4 CPU 1 CPU 8 TS case with 3 interfacing points CPU 2 CPU 5 CPU 9 CPU 6 CPU 10 CPU 13 CPU 3 CPU 11 Electrical signals Communication signals CPU 7 CPU 12

8 4 Terminal VSC/HVDC Link Hybrid and Parallel Computing Using 9 Processors HMI/Control 8 Hybrid Interface from EMT to Transient Stability Parallel Processing EMT Detailed Model

9 9 HVDC/VSC Studies Compare 2 nd LCC Pole to VSC Pole Mainland Transient Stability V32 EMT Detailed HVDC Models (Monopole and Bipole LCC) EMT Detailed VSC Models (Monopole) Island Transient Stability V29

10 10 MISO HVDC Concept (by Dale Osborn)

11 11 Large Study Example

12 12 Multi Vendor Simulation Setup Private VPN interfaces (allows manufacturers to remotely participate and update models) Wind #1 Wind #2 VSC #1 VSC #2 VSC #3 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 LAN/Switch

13 13 Thank You! Contact: Garth Irwin Chaminda Amarasinghe