Feasible operation region of an electricity distribution network

In the course of net zero carbon transition, electricity distribution networks are faced with great challenges brought by increasing total and peak demand due to electrification transport heat, as well significant uncertainties from renewable power generation customer behaviors (such electric vehicle travelling behaviors). Therefore, network operators (DNOs) need effective tools assess capability in integrating conduct active management efficient expansion networks. However, conventional scenario-based assessment methods only provide conservative limited information on capability, also exponentially increased computational burden. By contrast, another stream different philosophy, named operation region-based methods, describe overall picture analytically little needed. existing linearized analytical regions, which mainly applied transmission networks, cannot accurately enough. To solve these problems, a novel feasible region (FOR) method quadratic expressions was proposed characterize range operating states where thermal voltage constraints will not be violated. The FOR is geometry high-dimensional space, thus error analysis approach further developed for validating method. boundary errors described multiple distance functions operational indices, conservativeness boundaries quantified. An 11 kV radial United Kingdom Generic Distribution System (UKGDS) used case study. simulation results show that approximated real FOR. maximum would maximally cause an overcurrent up 116 % undervoltage down 0.96p.u., able satisfy requirements engineering practice. Compared linear approximation (termed hyperplane expressions) boundaries, were proved have higher accuracy.