Now showing 1 - 2 of 2
  • Publication
    Information Gap Decision Theory Based Congestion and Voltage Management in the Presence of Uncertain Wind Power
    The supply of electrical energy is being increasinglysourced from renewable generation. The variability anduncertainty of renewable generation, compared to a dispatchableplant, is a significant dissimilarity of concern to the traditionallyreliable and robust power system. This change is driving thepower system towards a more flexible entity that carries greateramounts of reserve. For congestion management purposes itis of benefit to know the probable and possible renewablegeneration dispatch, but to what extent will these variations effectthe management of congestion on the system? Reactive powergeneration from wind generators and demand response flexibilityare the decision variables here in a risk averse multi-periodAC optimal power flow (OPF) seeking to manage congestionon distribution systems. Information Gap Decision Theory isused to address the variability and uncertainty of renewablegeneration. In addition, this work considers the natural benefitsto the congestion on a system from the over estimation of windforecast; providing an opportunistic schedule for both demandresponse nodes and reactive power provision from distributedgeneration.
      665Scopus© Citations 62
  • Publication
    Local and Remote Estimations Using Fitted Polynomials on Distribution Systems
    (IEEE, 2016-11-18) ;
    This work describes a technique to define a single parametric equation that estimates remote conditions within a distribution network, in an online setting, without dedicated telemetry. In this novel approach, a departure from conventional state estimation is explored to facilitate a fully decentralized operation. Derived based on fundamental treatment of ac power flow, the electrical behavior of a section of network is defined to a tractable constraint space using regression analysis. In this non-iterative technique, a measurement set consisting of the local voltage magnitude, active and reactive power injections at a single node are the input to pre-computed polynomials. Remote current flow, active power and reactive power flow as well as remote and local voltages and sensitivities are estimated in a direct calculation from period to period. Accurate estimations are also found in the presence of transducer errors. To assess the applicability of this technique at differing voltage levels a range of reactance to resistance ratios are considered.
      500Scopus© Citations 14