What is wrong with the conservative power theory (CPT)

The Conservative Power Theory (CPT) is one of the latest approaches to definitions of powers and compensation in systems with nonsinusoidal voltages and currents. It is shown in this paper that the CPT misinterprets power phenomena in electrical systems, however, and it does not create right fundamentals for the power factor improvement by reactive compensation. In particular, capacitive compensation of the “reactive energy” W, as defined in the CPT, can even degrade the power factor. It is also demonstrated in the paper that the unbalanced current in the CPT is wrongly defined.

[1]  Alessandro Costabeber,et al.  Application of Conservative Power Theory to cooperative control of distributed compensators in smart grids , 2010, 2010 International School on Nonsinusoidal Currents and Compensation.

[2]  P Mattavelli,et al.  Conservative Power Theory, a Framework to Approach Control and Accountability Issues in Smart Microgrids , 2011, IEEE Transactions on Power Electronics.

[3]  L. Czarnecki.  What is wrong with the Budeanu concept of reactive and distortion power and why it should be abandoned , 1987, IEEE Transactions on Instrumentation and Measurement.

[4]  Leszek S. Czarnecki,et al.  Budeanu and fryze: Two frameworks for interpreting power properties of circuits with nonsinusoidal voltages and currents , 1997 .

[5]  L.S. Czarnecki.  Currents’ Physical Components (CPC) concept: A fundamental of power theory , 2008, 2008 International School on Nonsinusoidal Currents and Compensation.

[6]  Paolo Mattavelli,et al.  A Time-Domain Approach to Power Terms Definition under non-sinusoidal conditions , 2005 .

[7]  Leszek S. Czarnecki,et al.  Critical comments on the Conservative Power Theory (CPT) , 2015, 2015 International School on Nonsinusoidal Currents and Compensation (ISNCC).

[8]  Paolo Mattavelli,et al.  Application of Conservative Power Theory to load and line characterization and revenue metering , 2012, 2012 IEEE International Workshop on Applied Measurements for Power Systems (AMPS) Proceedings.

[9]  P. Zakikhani,et al.  Suggested definition of reactive power in nonsinusoidal systems , 1973 .