Harmonics in power system

Harmonics in power system Electrical and Computer Engineering Student Colorado State University Minh Anh Thi Nguyen E-mail: [email_address] [email_address]

Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

History of harmonics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Linear loads ,[object Object],[object Object],[object Object],[object Object]

Non-linear loads ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

How big is this problem? ,[object Object],[object Object],[object Object]

Single phase vs. three phase load harmonics ,[object Object],[object Object],[object Object],[object Object],[object Object]

General definition ,[object Object],[object Object],[object Object],[object Object]

General definition ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What are harmonics? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What are causes of harmonics? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Harmonic current flow ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

How do you check for harmonics currents? ,[object Object],[object Object],[object Object],[object Object]

Will harmonic currents affect your power costs? ,[object Object],[object Object],[object Object],[object Object],[object Object]

Harmonics components ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

How is such component divided obtain ,[object Object],[object Object],[object Object]

Three phase Balance and unbalance Systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What problem do harmonics create? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

How do you know if you have a harmonic problem? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Circuits ,[object Object],[object Object]

circuit1 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Circuit 2 ,[object Object], * U:E461chematic1.sch **** FOURIER ANALYSIS TEMPERATURE = 27.000 DEG C *********************************************************************** FOURIER COMPONENTS OF TRANSIENT RESPONSE V(Vout) DC COMPONENT = 3.388514E+01 HARMONIC FREQUENCY FOURIER NORMALIZED PHASE NORMALIZED NO (HZ) COMPONENT COMPONENT (DEG) PHASE (DEG) 1 6.000E+01 5.936E+02 1.000E+00 -2.692E+01 0.000E+00 2 1.200E+02 4.194E+01 7.066E-02 4.173E+01 9.558E+01 3 1.800E+02 3.153E+01 5.311E-02 3.283E+01 1.136E+02 4 2.400E+02 2.487E+01 4.190E-02 2.837E+01 1.361E+02 TOTAL HARMONIC DISTORTION = 9.782316E+00 PERCENT

Bipolar amplifier circuit ,[object Object]

Bipolar amplifier circuit ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

If you have a harmonics problem, what should you do? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Reducing harmonics ,[object Object],[object Object],[object Object],[object Object]

Reducing harmonics (const.) ,[object Object],[object Object]

Why harmonic unknown or untreated in electrical distribution system? ,[object Object],[object Object],[object Object],[object Object]

Design a hearing aid or heart pacemaker

Output results ,[object Object]

How can we treat harmonics system? ,[object Object],[object Object],[object Object],[object Object],[object Object]

Why are voltage and current harmonics a problem ,[object Object],[object Object],[object Object],[object Object],[object Object]

IEEE standard STD 519 ,[object Object],[object Object],[object Object],[object Object],[object Object]

IEEE standard 519 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What will happen if you do not follow the IEEE Std 519 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Unexpected harmonics creates ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Solution ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Reference ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Harmonics in power system

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Harmonics in power system