ABB November 16, 2016 Slide 1

Transcription

1 Xuemei Wang, Power Quality Center, Xi an ABB Capacitor Company Ltd, November, 2016 ABB Power World 2016 Power Quality Solution in Distribution Net Work ABB November 16, 2016 Slide 1

2 Power Quality Basic Concept Power energy special product Power energy is produced, transmitted and consumed almost at the same time. Power energy is irreplaceable. Destroyers of power quality may also be victims of the power energy with poor-quality. High-quality power energy should be guaranteed by 3 parties, the supplier, the distributor and the consumer. Power quality Voltage, current or frequency deviation in AC system. Change of power system network and structures Non-linear devices Industrial automation degree increased. contradiction between high-tech and poor quality power ABB November 16, 2016 Slide 2

3 Power Quality Problem Sources Typical Disturbance Lightning impulse Switch on capacitor bank or transformers Switch on large-load equipment Definition of power quality Voltage quality Current quality Frequency quality Non-linear and unbalanced load Equipment and power grid failure Misoperation Safety Stable High-quality Economic ABB November 16, 2016 Slide 3

4 Power Quality Classify Voltage Quality Voltage changes: Continuous interruption Under voltage Current Quality Current harmonics, interharmonics, and subharmonics Noise Overvoltage Voltage waveform distortion, harmonics, interharmonics and notches Voltage fluctuation, transient, flicker, sag, discontinuity Voltage frequency deviation ABB November 16, 2016 Slide 4

5 Power Quality Power Grid Power is commodity Main concerns: System losses System voltage stability Transmission ability Target Emphasis on: Cost saving Increase earnings Environment protection ABB November 16, 2016 Slide 5 power quality optimization increases load capacity and saves the cost of power grid

6 Power Quality Utility Industry Power is cost Main concerns: Power factor Voltage stability, continuity and reliability Target Emphasis on: Cost saving Benefit increase Rapid recovery after an accident Less cost, more benefit ABB November 16, 2016 Slide 6

7 Power Quality ABB Overall Arrangement Sweden HV / PQC/ TLC Belgium LV / PQC / TLC Canada PQC Dubai PQC Xi an China HV / LV / PQC/ TLC Spain Brazil PQC PQC India LV / HV Tailand LV HV capacitor:3 LV capacitor:2 Australia PQC: 8 PQC TLC:3 ABB November 16, 2016 Slide 7

8 ABB Xi an Capacitor Company Ltd Power Quality Solution and Product System analysis / Power quality monitoring Failure analysis / solution Site commissioning test/ training Power quality solution for distribution network Power quality solutions for industrial MV and HV fixed compensation / filter MV dynamic reactive power compensation Series capacitor bank LV Statcon/PQF/Dynacomp Capacitor unit HV: BAM/AAM LV: CLMD ABB November 16, 2016 Slide 8

9 Power Quality Portfolio ABB November 16, 2016 Slide 9

10 ABB Xi an Products Unit Fuse Technology Internal fuse External fuse Fuseless Conventional fuseless Internal fuse External fuse ABB design Conventional ABB Group November 16, 2016 Slide Fuse Discharge resistor

11 ABB Xi an Products Shunt Compensation Installation Customer value Open rack Open rack Improve system power factor Provide transmission capacity Reduce transmission loss Fully use the economic benefits of equipment Cubicle Pole mounted ABB November 16, 2016 Slide 11

12 Shunt Compensation Improve System Power Factor Active power Active power can be added on the line Reactive power Transmission line Transmission line P+jQ L P+j(Q-Qc) L jqc Transformer cosφ = P S = P P 2 + Q 2 Load Transformer Capacitor cosφ = P Load P 2 + (Q Qc) 2 ABB Group November 16, 2016 Slide 12 12

13 Shunt Compensation Increase Equipment Utilization Rate 1000+j j482 cosφ=0.7 Load cosφ=0.9 Load 527kvar Shunt capacitors 1428 kva 1000 kw Cos = kvar 1000kW Cos = kva AC Supply 1111 kva 1009 kvar 482 kvar 22% available Low power factor, transformer fully load Power factor improved and 22.2% transformer capacity available ABB Group November 16, 2016 Slide 13 13

14 Shunt Compensation Reduce Transmission Losses 1000+j j482 cosφ=0.7 Load cosφ=0.9 Load Line impedance=r+jxl 527kvar Shunt capacitors Active power consumed by load: P = U I cosφ P I = U cosφ Line loss: P = I^2 R P P = ( )^2 R U cosφ ABB Group November 16, 2016 Slide 14 14

15 Shunt Compensation Improve Load Side Voltage U1 U2 U1 U j j482 cosφ=0.7 负荷 cosφ=0.9 Load 527kvar Shunt capacitors U PR QX U 1 L U 2 = U 1 U ABB Group November 16, 2016 Slide 15 15

16 Shunt Capacitor Installation Open Rack ABB Group November 16, 2016 Slide 16 16

17 Shunt Capacitor Installation Cubicle Capacitor Bank Technical specification System voltage:6kv/12kv Dimension: 1.6m/1.2m/1m*1.6m*2.25m(L*W*H) Enclosure level:ip4x Contamination level:ii Switching type:step by step automatic switching or fix switching Capacity per step: max 2000kvar Product standard: DLT GB50227 GB11024 MMECB:Modular Metal Enclosed Capacitor Bank ABB Group November 16, 2016 Slide 17 17

18 Shunt Capacitor Installation Pole Mounted Capacitor Bank Technical specification Voltage rank:6~24kv Capacity range:<= 2.4Mvar ABB Slide 18

19 Pole Mounted Capacitor Bank Reduce Transmission Losses, Increase Energy Efficiency Feature & application Close to loads to compensation Postpone retrofit of current line and equipment, save investment Reduce transmission loss Improve voltage of user side Application Long distance transmission of rural power grid Load Dispersed Oil Zone System ABB Slide 19

20 Shunt Filter Capacitor Banks Filtering Principle Providing a low impedance path to the harmonics Clean power grid Clean water Water purify station Polluted water Clean current Polluted current (harmonics) Filter Water flow without pollution (System) Load (Harmonic source) ABB Group November 16, 2016 Slide 20 20

21 Shunt Filter Capacitor Banks Succeed Case Japan AGC Group Malaysia 275kV Samalaju project ABB Group November 16, 2016 Slide 21 21

22 Dynamic Reactive Power Compensation SVC_Light / STATCOM / SVG Xi an ABB SVG ABB Group ABB Group November 16, 2016 Slide 22 22

23 ABB Xi an Power Quality Center Service Cope Distribution net power quality problem checking Distribution net power quality problem analysis and simulation Distribution net power quality solution Industrial project power quality research report & overall solution making, product proving, on site installation & commission, maintenance & training On site problem analysis and solving Power quality product & solution promotion ABB Group November 16, 2016 Slide 23 23

24 Power Quality On-site Problem Solving Case On-sit problem: Big Noise With 7th filter Operating PQC solutions: ABB Engineer check and exclude the product quality reason Simulation & calculation Find reason to the problem, and provide solution Installed the protection equipment, Noise disappear ABB PQC provide the PQ test and simulation again and operating suggestion ABB Group November 16, 2016 Slide 24 24

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