enabling the next generation grid by means of … the next generation grid by means of advanced...

Enabling the Next Generation Grid by means of

Advanced Hardware in the Loop Technology

E.ON Energy Research Center

RWTH Aachen University

ISGT 2012

17.10.2012

| ACS Automation of Complex Power Systems |

The Real-Time Simulation Lab at ACS

ISGT 2012

217.10.2012

Presented at 2012 3rd IEEE PES ISGT Europe, Berlin, Germany, October 14 -17, 2012


Real Time Digital Simulator (RTDS)

3

Description: (one rack)

4 Giga Processor Cards

1 Workstation Interface Card

1 Network Communication Card

Analog and digital I/O

State of the Art for power system real-time

simulation

Test of communication standard

HIL test: through dedicated connections for

relays and many analog and digital I/O

PHIL test: through Grid Emulator

Stochastic analysis

Applications:

ISGT 2012

17.10.2012


Sample projects – Power System Monitoring and Control

4

Definition of new stability criteria for the grid

From Phasor to Dynamic Phasors

New algorithms for Phasor Calculation

Application in Distributed State Estimation

Application in Distributed Control

ISGT 2012

17.10.2012



Sample project - RT for Wind Tower testing

5

Design of a test-bench for Wind Towers in a 1:1 Scale

Two steps project: first 1 MW and then 4 MW

RT simulation of the Interface to the main grid

Collaboration of many Institutes of RWTH

ISGT 2012

17.10.2012


PC cluster

6

Description:

Applications:

4 Processors, 32 cores

128 GB RAM

5 PCI connections

Each node:

Five Nodes for a total of 160 cores and 640 Gb of RAM

InfiniBand and Ethernet connection

Real time and non real time simulation of multi-physic system

Modelica support

Stochastic analysis.

Support for standard scientific tools like Matlab.

Easy to replicate, expand and upgrade

ISGT 2012

17.10.2012



Sample project - Home Energy Systems

7

Home Energy System analysis and

grid integration:

Energy Service Interface development

Renewables and storage integration

Grid stability

Congestion

ISGT 2012

17.10.2012


Interacting grids

8

Goal:

Develop a simulation platform to investigate issues and possibility related to

the interaction of different energy carriers.

= Electrical grid

= Gas grid

= Heat grid

ISGT 2012

17.10.2012



DSP Cluster

9

Description

Multi DSP modular real time simulator

Each board:

1DSP, 1FPGA

Various I/O board

Applications:

Simulation of distribuited system

Wind Farms

PV systems

Hardware In the Loop, Power Hardware In the

LoopCOLLECTOR

OTHER SYSTEM

10 x DSP

CO

M

10 x DSP

CO

M

10 x DSP

CO

M

10 x DSP

CO

M

10 x DSP

CO

M

ISGT 2012

17.10.2012


DSP Cluster

Processor card

DSP: TigerSHARC

FPGA: Spartan6 LTX

32 MByte SDRAM

8 MByte FLASH

10

Interface Card

8 AI, 50 MSPS per channel,14 bit

8 AO, 2.5 MSPS, 14 bit

16 high-speed DIO

First Prototype

Two processor boards

Two interface cards

Preliminary backplane

ISGT 2012

17.10.2012



Simulation Software

Virtual Test Bed

New parallel solver based on use of Linear Multistep Compound (LMC)

method.

11

Software features:

Allow parallelization

Avoid matrix inversion

Eliminate multiple solutions during the same time step

(minor steps)

Application and hardware features:

Small time step required by simulation

High speed and low latency communication

Real hardware broadcast

ISGT 2012

17.10.2012


Sample project - RT for Large Wind Farm

12

Wind Farm Simulator Grid RT Simulator

Real Industrial Controller

Analysis of wind farm integration:

Intermittency and spinning

reserve

Grid stability

Congestion

Grid code testing

ISGT 2012

17.10.2012



Power Hardware In the Loop Interface: Flexible Power Simulator (FlePS)

13

Power rating: 25kVA

Four phase output: 1 three phase system with

control of the neutral point

2 independent single phase

AC systems

2 independent DC systems

Switching frequency: 40kHz

LCL/LC

FILTER

DEVICE UNDER

TEST (DUT)

ACTIVE FRONT

END (AFE)

DC LINK

FOUR-LEG

INVERTER

ISOLATING

TRANSFORMER

POWER

INTERFACE

DISTRIBUTION GRID

REAL TIME

SIMULATOR

CONTROL

ALGORITHM

PWM

SIGNALS

VOLTAGE/CURRE

NT REFERENCES

CURRENT

&VOLTAGE

MEASUREMENTS

CURRENT/VOLTAGE

MEASUREMENTS

ISGT 2012

17.10.2012


Hybrid Micro Grid

14

Topology Power Ratio fsw Quantity

Back to Back, threephase

45 kVA 10 1

DC/AC, three phase 5 kVA 10 4

Investigate issue related to the implementation of hybrid low voltage micro

grids. Analysis of Hybrid structures

Main features:

Five converters

Interface to RT via FLEPS

ISGT 2012

17.10.2012



Laboratory Communication Infrastructure

15

ISGT 2012

17.10.2012


Communication Emulation

16

Goal: supporting the analysis of power systems with a reliable and accurate

representation of communication networks

Communication network simulated

off-line using OPNET

Network emulated in Real Time

using WANem (parameter can be

defined in a stochastic way):

Time delay,

Packet loss,

Packet corruption,

Disconnections,

Packet re-ordering

Parameter extraction

ISGT 2012

17.10.2012



Communication Emulation

17

496 498 500 502 5040

100

200

300

400

500

Delay [ms]

Num

ber

of O

bserv

ations

Test1

0 200 400 600 800 10000

10

20

30

40

50

60

70

Delay [ms]

Num

ber

of O

bserv

ations

Test2

300 400 500 600 7000

10

20

30

40

Delay [ms]

Num

ber

of O

bserv

ations

Test2b

90 100 110 120 130 140 1500

20

40

60

80

100

120

140

Delay [ms]

Num

ber

of O

bserv

ations

Test3

ISGT 2012

17.10.2012


RTDS Communication Interfaces

18

Giga Transceiver Network Communication Card (GTNET)

IEC 61850 GSE binary messaging.

IEC 61850-9-2 sampled values

DNP

Xilinx ML507

Direct connection with fiber-optic to GPC card.

Data exchange at every time step (50us)

ISGT 2012

17.10.2012



Monitoring Systems

Goals:

Investigating the application of synchrophasor measurements

Definition of a new measuring infrastructure for future active distribution grids

Planned installation of:

3-5 PMUs

SCADA System

~10 Smart Meters

19

ISGT 2012

17.10.2012


Distributed Intelligence and MAS

20

Multi Agent System to control the

voltage over a radial feeder.

Tested in real-time

Communication over an OPC server

Two options for agent development:

Labview real-time as OS

Alternative version directly in JADE

ISGT 2012

17.10.2012



Conclusions

The presentation gave an overview of the capabilities of the Real Time

laboratory at the E.ON ERC/ACS – RWTH Aachen

Main strenght is the availability of a variety of platforms to tackle a

variety of problems

Fundamental step in the development of advanced feature is the need

to go beyond simple electrical engineering questions

Multi-physics for Home Energy Systems

Multi-physics for Neighborhood Energy Systems

Procedures for embedding communication emulation

21

ISGT 2012

17.10.2012


enabling the next generation grid by means of … the next generation grid by means of advanced...

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