Impact of Voltage Conditions on Distributed Generation Connectivity in Medium Voltage Grids
Journal Title: Acta Energetica - Year 2015, Vol 25, Issue 4
Abstract
A significant increase in the distributed generating sources connected and planned for connection to medium voltage (MV) grids makes voltage criteria very important in assessing the sources’ connectivity. Many requests have been submitted for connection of distributed generation sources at a considerable distance (even a dozen or so kilometres) from a main supply substation’s MV buses. As a rule, these are requests for the interconnection deep in an existing MV bus, but also directly to MV switching substation bays. Then maintaining appropriate voltage levels becomes a basic technical problem. Another technical problem relates to meeting the power quality criteria. THD index, and the level of individual harmonics, significantly increases, in many cases reaching or even exceeding the boundary values. With their extensive experience, the authors present examples and results of some analyses herewith. They indicate the impact of voltage conditions on the connection possibilities of distributed generation to MV grids.
Authors and Affiliations
Ireneusz Grządzielski, Krzysztof Marszałkiewicz, Andrzej Trzeciak
Keywords
Related Articles
- EP ID EP200127
- DOI 10.12736/issn.2300-3022.2015403
- Views 62
- Downloads 0
Laboratory Power System Model Designed for Testing Dynamic Processes
Identification tests of dynamic and transient processes which occur in a power system are usually based on simulation. Structures of systems used for simulation testing are built from simplified models of power system co...
Calculations of Short-Circuit Current Flows in Earth Wires of HV Lines
This paper presents a method which enables calculating flows of short-circuit currents in earth wires of high voltage transmission lines, and its implementation in the form of a computer programme. The algorithm enables...
Analysis of Technical Possibilities of Photovoltaic and Wind Sources Playing in an Ancillary Service of Frequency and Power Regulation
Together with a growing share of renewable energy sources (RES) in the generation sector of power systems, the interest of power grid operators in the possibilities of their use for regulation purposes is growing. The po...
The Impact of a Power Electronics Converter in Phase Failure Work on the Power System Network
The paper presents the impact of phase failure work on power converters. The study includes a three-level NPC inverter (Neutral Point Clamped), controlled by Voltage Oriented Control (VOC). The NPC converter integrates r...
Experimental Study of Higher Harmonics Content in Street Lighting System Current
Due to energy efficiency improvement requirements, street lighting system operators tend to reduce the electricity consumed by the lights themselves, and also minimize losses in the system. Smart lighting control systems...