Electricity Distribution Effectiveness
Journal Title: Acta Energetica - Year 2015, Vol 25, Issue 4
Abstract
This paper discusses the basic concepts of cost accounting in the power industry and selected ways of assessing the effectiveness of electricity distribution. The results of effectiveness analysis of MV/LV distribution transformer re-placement are presented, and unit costs of energy transmission through various medium-voltage line types are compared. The calculation results confirm the viability of replacing transformers manufactured before 1975. Re-placing transformers manufactured after 1975 – only to reduce energy losses – is not economically justified. Increas-ing use of a PAS type line for energy transmission in local distribution networks is reasonable. Cabling these networks under the current calculation rules of discounts for excessive power outages is not viable, even in areas particularly exposed to catastrophic wire icing.
Authors and Affiliations
Waldemar Szpyra, Wiesław Nowak, Rafał Tarko
Issues of Estimating the Maximum Distributed Generation at High Wind Power Participation
This paper presents the methods of estimating the maximum power that can be connected to the power system in distributed generation sources. Wind turbine generator systems (WTGS) were selected as the subject for analysis...
Evaluation of Transmission Grid Voltage Impact on the Operation of Power Units’ Auxiliary Systems
This paper presents the low voltage impact on the operation of critical auxiliaries of selected generation units in the national power system. Time limits are determined for the operation of these auxiliaries at low volt...
Simplified Distribution Grid Modelling for Connection Analyses
This paper considers the modelling of medium and low voltage grids for the purpose of connection studies by distribution grid operators. Possible simplifications in grid modelling are discussed, which are acceptable from...
Increasing Generation Capacity by Power Unit Upgrades
To ensure Poland’s energy security in the coming years will require increasing the power system’s generation capacity while at the same time improving both the efficiency of electricity generation and its use [1, 2]. One...
Problems of Connecting Wind Farms to the Power System with HV Cables
This paper presents problems caused by connecting wind farms to a power system with high voltage cables. The author highlights possible problems with reactive power compensation, depending on the arrangement of the shunt...