IMPORTANCE OF ACCURATE MEASUREMENTS DURING THE LIFE CYCLE OF UTILITIES

Transcription

1 IMPORTANCE OF ACCURATE MEASUREMENTS DURING THE LIFE CYCLE OF UTILITIES Thomas Steiner HIGHVOLT Prüftechnik Dresden GmbH

2 Lifecycle of utilities time schedule utilities Tests during life cycle of utilities after repair jobs diagnose, on site on site during installation in factory during production research and developing electrical apparatus transformators cable switchgear motors / generators facts bushings / isolators arrestors 2

3 Lifecycle precise measuring WHY WE NEED TEST? For testing the utilities during research & developing (R&D). research & developing => develop tests design => type test IEC ,2 repair => on site tests IEC ,2 protection => online monitoring life cycle measuring & recording maintenance => service tests production => routine tests IEC ,2 putting into operation => on site tests IEC

4 R&D LONG TRANSMISSION LINES HIGHER VOLTAGE P=U*I with I=U/R P= U²/R test voltage[kv] IEC Standards available UHV discussion impulse test system voltage LIC LI SI AC(peak ) AC(rms) rated voltage of equipment [k V] increase life time magic reduce material reduce losses 4

5 Lifecycle precise measuring and recording WHICH CHALLENGE ARE FOR R&D NECESSARY? Task test and measurement system with a high reliability AC,DC, impulse, high current test and measuring equipment measuring devices which are not influenced by environment conditions as (EMC, grounding system, interferences) precise measuring of high voltage, high current and high power recording of test data's common data basis analytic and evaluation tools Solution high quality available test and measuring systems robust shielded or isolated measuring solutions precise attenuator and digital measuring devices life cycle measuring & recording 5

6 Precise measuring devices ISOLATED OR WELL SHIELDED PRECISE MEASURING DEVICES transient recorders (HiRES) power/loss measurement systems (LiMOS HS and LiMOS MS) isolated synchronized channels EMC protected flexible verified integrated evaluation software no grounding circuits 6

7 Technical parameters HiRES TRANSIENT RECORDERS HiRES max. sampling rate: amplitude resolution: sampling memory: measurement ranges: overvoltage protection: user selectable filters: DC accuracy ±100 mv - ±10 V: DC accuracy ±50 mv: fiber length: 250 MS/s 14 bit 120 MS per channel ±50 mv ±10 V up to ± 2000 V ±300 V 1 MHz, 200kHz ±0.2% (full scale) ±0.5% (full scale) up to 2 km fiber degradation / attenuation detection automatic optical fiber length compensation for channel synchronization 7

8 Calibration HiRES SWITCHING IMPULSE VOLTAGE 250/2500 S Up deviation ± 0,15% Tp deviation ± 0,25% T2 deviation ± 0,20% 8

9 Technical parameters LiMOS HS POWER/LOSS MEASUREMENT SYSTEMS LiMOS HS measurement range voltage: 100 V kv (sensor dependent) measurement range current: 1 A A (sensor dependent) accuracy voltage/current: 0.08 % (at 40 % to 110 % range utilization) accuracy power: 0.11 % to 0.90 % (at 100 V and 1 A, depending on the power factor) measuring frequency: 50 and 60 Hz operating frequency: 40 to 200 Hz low uncertainty magic clearances big loops 9

10 Calibration LiMOS HS CALIBRATION, FREQUENCY 50 HZ (UP TO 100KV AND 4KA) Voltage deviation ± 0,025% Current deviation ± 0,005% 10

11 Software DIFFERENT DATA FORMATS FOR EACH SOFTWARE life cycle measuring & recording 11

12 Lifecycle precise measuring WHY WE NEED TEST? For testing the utilities in the factory and on site. research and developing => develop tests design => type test IEC ,2 repair => on site tests IEC ,2 protection => online monitoring life cycle measuring & recording maintenance => service tests production => routine tests IEC ,2 putting into operation => on site tests IEC

13 Testing utilities in the factory and on site CHALLENGES FOR THE MEASURING DEVICES impulse V, I, t acoustic V,I induced voltage PD P, S applied voltage V C tan ratio R device under test (e.g. transformators) data base central test report analyses of trends compare of wave shapes transfer function live cycle measuring & recording 13

14 On site measuring and test WHICH CHALLENGES ARE ON SITE? Task test and measurement system with a high reliability according to the relevant standards (IEC, IEEE etc..) measuring devices which are not influenced by environment conditions as (EMC, grounding system, interferences) precise measuring of high voltage, high current and high power recording of test data common data basis analytic and evaluation tools Solution high quality measuring accordence the standards robust shielded or isolated measuring solutions precise attenuator and digital measuring devices life cycle measuring & recording 14

15 Diversity of precise measuring devices MEASURING DEVICES 16

16 Different control & measuring system must be integrated in one solution test systems AC test systems based on: transformators reactor with variable inductivity reactor and frequency converter static frequency converter Impulse test system High current test system DC test systems Combined test systems, AC, DC, Impulse measuring devices Measurement category HV Other Voltage (AC, DC, Impulse) Current (AC, DC, Impulse) Partial discharge (IEC 60270, UHF, accustic, etc. ) Capacity, tan delta Power Acoustics Temperature x x Resistance (Winding, Isolation etc.) Ratio Disruptive discharge in oil others x x x x x x x x x x x 17

17 HiCOS SQL- data base datamanagement measurement control data pool life cycle measuring & recording reports reports condition assessment Indications for the tested utilities 18

18 Conclusion life cycle measuring & recording It is necessary to measure with a low measuring uncertainty to save money during the R&D process and to fulfill the request of the market. Actual: compare with the footprint at factory and on site compare same types Target: precise measuring during the hole life cycle of utilities is necessary to get assessment criteria's for the future! 19

19 Lifecycle precise measuring saves costs It is necessary to measure prices and to record the data during the hole life time in a way, that it is possible, to work with the results during the complete life cycle! Thanks for your attention. research and developing => develop tests design => type test IEC ,2 repair => on site tests IEC ,2 protection => online monitoring HiCOS maintenance => service tests production => routine tests IEC ,2 putting into operation => on site tests IEC