Real Solutions for Power Systems, Not Just Theories
smartgrids.ro
Share on
Bitdefender Total Security 2016

Steady state estimation for unbalanced and harmonic polluted distribution systems
  • Suitable for real power distribution systems
  • Supports distributed generators and microgrids
  • Tested on IEEE power distribution test systems
  • IEEE

    What is it about?

    The optimization in the operation of distribution electric systems has become an acute problem. In order to evaluate some essential criteria (e.g., active power losses) the computation of power flow is absolutely necessary. Currently, this computation considers that the system is balanced and the waveforms are sinusoidal. But it is well known that the modern distribution systems are unbalanced and, often, harmonic polluted. Thus, taking into account the real operating conditions (unbalance, harmonics) it is of great interest for accurate steady state estimation.

    Basically, power flow algorithms are iterative and are based on different procedures: Gauss-Seidel, Newton-Raphson, backward/forward sweep. For distribution systems which are operated in radial configurations, the most recommended approach are backward/forward sweep based algorithms because of the small iterations number required and robust convergence.

    Backward sweep

    Backward sweep


    How it works?

    Besides the data types existing in the numbers theory, the high level programming languages allow the definition of new artificial data types, i.e. abstract data types. Thereby, all kind of electrical quantities are modeled as abstract data types.

    Furthermore, by implementing these models, all quantities are considered as objects. As a result, electrical engineering laws, as Ohm or Kirchhoff, are reduced to simplified expressions corresponding to fundamental harmonic component single-phase case.

    Consequently, we have introduced these objects on the backward/forward sweep algorithm with some particular adaptations. In what follows, the result solutions are given (see the Table):

    Scenario
    Unbalanced
    Harmonic polluted
    Power flow algorithm
    1
    NO
    NO
    Classic Backward/Forward
    2
    YES
    NO
    Object Oriented Solution
    3
    NO
    YES
    Object Oriented Solution
    4
    YES
    YES
    Object Oriented Solution


    Interested about?

    Please contact smartgrids.ro.







    Electric Power Systems Research
    OBphasor - Calculator for electrical engineering
  • Useful tool for each electrical engineer
  • It doesn't require installation on computer
  • It works on all versions of Windows operating system
  • Click here for more details >>
    Download for free

    smartgrids.ro

    © 2016 by Bogdan Tomoiaga

    Follow me on ResearchGate Bogdan Tomoiaga's bibliography View Bogdan Tomoiaga's profile on LinkedIn
    Follow me on Academia.edu