Prague, 8-11 June 2009 - CIRED · 2018-09-10 · Prague, 8-11 June 2009 Energie AG - Grid Andreas...

Prague, 8-11 June 2009

SMART METERING FEATURESFOR MANAGING LOW VOLTAGE

DISTRIBUTION GRIDS

Andreas Abart - Austria Session 5 Paper 0198

Andreas ABART Andreas LUGMAIR Alexander SCHENKEnergie AG OÖ Netz GmbH – Austria Siemens AG – Austria Siemens AG - Austria [email protected] [email protected] [email protected]


Energie AG - Grid


SMART METERING FEATURES FOR MANAGING LOW VOLTAGE DISTRIBUTION GRIDS

• 439.600 Customers 6,8 TWh/a

• 42 Stations 110/220 kV / 10…30 kV

• 4 110 kV-switching stations

• 8500 30/0.4 kV Substations

• Almost 9000 km lines (110 kV & 30 kV) about 20% cables

• Almost 21.000 km lines (LV) about 60% cables


SIEMENS Smart Meters AMISAutomated Metering & Information System

Fully automated customer serviceincluding lock- and unlock-functionRegistration of load profiles14 different remote programmable registersControl of load switches e.g. for boilers following a programmable time scheduleOpen interface to meters for gas, water, heating etc.Power Quality: Voltage level statistic & DipsFuture proof: Firmware Upgrade, New functions and communication methods can be implemented by central software download




Introduction• Rural distribution grids are planed in respect to

voltage levels• Actual methods for managing voltage levels:

simple estimations and measurements in case of customer’s complaints

• Required: Long term and wide area observations using low cost systems (investment & operation)

• Solution: Using smart meters for doing weekly statistics of voltage levels




Technical & functional aspects

• A fully automated organization and presentation of data

• A compression of data for transmission and storage.

• It is presupposed that a standard meter can be programmed for these functions without any additional costs for extensions of hardware




Simple solution for long term and wide area voltage band observations

• Weekly histograms 15-min-AVG, -MIN, -MAXbalance - unbalance

• No transmission of profiles – just histograms

• Maximum distance of points of observation 70 m




Fluctuation of Voltages



207

212

217

222

227

232

237

242

247

252

20.1 21.1 22.1 23.1 24.1 25.1 26.1 27.1

U1 AVG

U2 AVG

U3 AVG

U1 min

U2 min

U3 min

U1 max

U2 max

U3 max


Classification of Voltage levels



Class Voltage RangeClass 11 U > 111%UNClass 10 111%UN >= U > 109%UNClass 9 109%UN >= U > 107%UNClass 8 107%UN >= U > 105%UNClass 7 105%UN >= U > 103%UN

Class 6 103%UN >= U > 97%UN

Class 5 97%UN >= U > 95%UNClass 4 95%UN >= U > 93%UNClass 3 93%UN >= U > 91%UNClass 2 91%UN >= U > 89%UNClass 1 89%UN >= U





207

212

217

222

227

232

237

242

247

252

00:00:00 00:00:00 00:00:00 00:00:00 00:00:00 00:00:00 00:00:00 00:00:00

U1 AVG

U2 AVG

U3 AVG

U1 min

U2 min

U3 min

U1 max

U2 max

U3 max





207

212

217

222

227

232

237

242

247

252

00:00:00 00:00:00 00:00:00 00:00:00 00:00:00 00:00:00 00:00:00 00:00:00

U1 AVG

U2 AVG

U3 AVG

U1 min

U2 min

U3 min

U1 max

U2 max

U3 max

max

min

AVG

3 in 1 Bar Diagram


Graphical presentation of results • 3 in 1 Bar Diagrams:

15-min average - white border15-min-Maximum (1sec RMS)- red border15-min-Minimum(1sec RMS)- blue border

• Each week one Diagram

• Min/Max hold function in Bar Diagrams




Voltage increase by unbalanced load



Reference impedance according to 61000-XZL=0,24+j0,15 OHM ZPEN=0,16+j0,1 OHM

Load delta U L1 delta U L2 delta U L31 kW -0,9% 0,5% 0,0%2 kW -1,8% 0,9% 0,0%3 kW -2,7% 1,4% 0,0%4 kW -3,5% 1,8% 0,0%5 kW -4,4% 2,3% 0,0%7 kW -6,1% 3,1% 0,1%


Animated presentation of results of long term observatios



Abart-austria-Session5-Paper0198.mpg


Long term analysis of results




Long term analysis of results

• A slide has to be easy to read• It must not be too crowded• It should contain no more than 6 lines• No more than 8 words per line• Diagrams must not be too detailed• Use Arial font



LV GRID MV GRID


Conclusions & Outlook I• Using a smart meter system an analyzing feature

for voltage levels could be developed• Results demonstrate the increase of voltage level

caused by unbalanced load• Further investigations in respect to voltage

unbalance measurements and phases separated 15-min-average value seem to be necessary




Conclusions & Outlook II• For put into practise: standardized procedures for

determining voltage band are needed• The presented functionality can be very important

for increased integration of decentralized generation

• Nevertheless setting up and operating such systems is some effort and therefore a cost benefit analysis has to be performed




Thank you for attention



Prague, 8-11 June 2009 - CIRED · 2018-09-10 · Prague, 8-11 June 2009 Energie AG - Grid Andreas...

Documents

Transcript of Prague, 8-11 June 2009 - CIRED · 2018-09-10 · Prague, 8-11 June 2009 Energie AG - Grid Andreas...