The new power processor and its application for AC

The new power processor and its application for AC power and energy measurement Jerzy Kolanko, Institute of Biomedical Engineering and Measurement ,Wroclaw University of Technology Piotr Modzel, Institute of Computer Systems for Automation and Measurements Wroclaw Zbigniew Wierzbicki, Institute of Computer Systems for Automation and Measurements Wroclaw Janusz Dudzik, Institute of Computer Systems for Automation and Measurements Wroclaw Przemysław Musz, Institute of Biomedical Engineering and Measurement ,Wroclaw University of Technology

20th IMEKO TC4 International Symposium – Benevento (Italy)

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Presentation outline 1) Problem of powering resistive and capacitive/inductive loads 2) Reactive power compensation 3) Integral definition of electric power 4) Splitting of power signal in time domain 5) Experiment by the heat 6) Power processor errors 7) Summary 20th IMEKO TC4 International Symposium – Benevento (Italy)

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Problem of powering resistive and capacitive/inductive loads

SECTION 1 20th IMEKO TC4 International Symposium – Benevento (Italy)

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Resistive loads • No phase shift • Less common in pratice in field of large loads (mainly heaters, conventional light bulbs, etc.)

20th IMEKO TC4 International Symposium – Benevento (Italy)

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Capacitive/inductive loads • Phase shift dependent on C, L and R values • Common for large industrial loads (motors, solenoids, transformers)

20th IMEKO TC4 International Symposium – Benevento (Italy)

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Reactive power compensation

SECTION 2 20th IMEKO TC4 International Symposium – Benevento (Italy)

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Reactive power compensation Two methods: static compensation

• passive • Active Coils

Switching capacitance regulator

Capacitors

Large industrial capacitors

20th IMEKO TC4 International Symposium – Benevento (Italy)

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Integral power definition

SECTION 3 20th IMEKO TC4 International Symposium – Benevento (Italy)

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Integral power definition Basic standard definitions

P = U I cos φ, Q=U I sin φ, S=U I

P = 1/T ∫ u(t) i(t) dt 20th IMEKO TC4 International Symposium – Benevento (Italy)

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Splitting of power signal in time domain

SECTION 4 20th IMEKO TC4 International Symposium – Benevento (Italy)

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Power in time domain • Splitting p(t)

• Integral equations DIN 40110 Pv = 1/T ∫ 0,5 (u(t)i(t) + Iu(t)i(t)I)dt Pr = 1/T ∫ 0,5 (u(t)i(t) - Iu(t)i(t)I)dt negative sign Pr – direction of energy where: Pv – input power, green line Pr – return power, yellow line than: Pd = 1/T ∫ Iu(t)i(t)I dt Pd = Pv+Pr - patent IKSAiP, WRUT ,PL P = Pv – Pr , Pd = P+2 Pr (power of mutual exchange) 20th IMEKO TC4 International Symposium – Benevento (Italy)

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Power processors New power processor ->

• New power processorP

Landis Gyr

Pd on screen

20th IMEKO TC4 International Symposium – Benevento (Italy)

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Experiment by the heat

SECTION 5 20th IMEKO TC4 International Symposium – Benevento (Italy)

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Laboratory system multiplier

Measurement system

Supply circuit

Measurement situation

20th IMEKO TC4 International Symposium – Benevento (Italy)

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Power measurements for R,RL 23 ° C I=0,78A

Pw [W]

Pwc [W] Pv [W]

Pr [W]

S [VA]

T [°C]

Pd [W]

Pd/S[%]

Φ = 50° 0,76 A

23,1

25,2

28,1

2,8

38,0

50

30,0

78

Φ = 0° 0,76A

34,5

38,4

39,2

0

40,0

66

38,4

96

67

65

73

95

76

78

77 z(6)

U=44,69V

%

1 π −2∣ϕ∣ P D (ϕ)=2UI sin∣ϕ∣+UI cosϕ π π 20th IMEKO TC4 International Symposium – Benevento (Italy)

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Power processor errors

SECTION 6 20th IMEKO TC4 International Symposium – Benevento (Italy)

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Power processor errors Dynamic errors ( 10 kHz) (Pr)

Phase shift error (P, Pv) 20th IMEKO TC4 International Symposium – Benevento (Italy)

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Summary

SECTION 6 20th IMEKO TC4 International Symposium – Benevento (Italy)

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Summary • Splitting p(t) – integral definitions • Relations - P, Pd, Pv, Pr • Physical presence of Pd – proof by the heat • Applications - Power metters, dynamic correctors

20th IMEKO TC4 International Symposium – Benevento (Italy)

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Thanks for attention

20th IMEKO TC4 International Symposium – Benevento (Italy)

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References and sources of images • • • • • • • • • • • • •

http://www.expertsmind.com/topic/inductive-reactance/pure-resistance-9725.aspxfamily.net/wpcontent/uploads/2011/09/light-bulb.jpg http://www.expertsmind.com/topic/inductive-reactance/pure-resistance-9725.aspx http://www.inverterdrive.com/prodimage/600_Marelli-MAA-80-B3-1.jpg http://sub.allaboutcircuits.com/images/02057.png http://www.ni.com/cms/images/devzone/tut/power_triangle_20081203163232.JPG http://static.tme.eu/katalog_pics/4/e/a/4ea004c8fb792c6790e29d25c81c0816/315.99.1015.jpg http://upload.wikimedia.org/wikipedia/commons/e/ed/Condensor_bank_150kV_-_75MVAR.jpg http://gershpost.com/wordpress/wp-content/uploads/2011/12/powerLines.jpg http://www.tme.eu/pl/details/315.99.1015/dlawiki/ducati/# http://www.tme.eu/pl/details/415.04.7225/kondensatory/ducati/# http://www.tme.eu/pl/details/rego5/regulatory-mocy/ducati/415985040/# J. Dudzik, J. Kolanko, P. Modzel, Z. Wierzbicki, „Praktyczne aspekty synchronicznego pomiaru mocy i energii elektrycznej z procesorem mocy” - prezentacja w ramach XXXIX WDNIT 2013 „Power Factor Correction (PFC) Handbook”, rev. 4 – ON Semiconductor, dostępne w sieci: www.onsemi.com/pub/Collateral/HBD853-D.PDF

20th IMEKO TC4 International Symposium – Benevento (Italy)

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WL 1 synchro under development

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WL1 synchro under development

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