Understanding LV Network Voltage Distribution- UK Smart Grid Demonstration Experience

This paper analyses the real-time voltage data acquired at Low Voltage (LV) distribution network substations to understand their distributions. It is a part of a smart grid demonstration project 'Low Voltage Network Templates' conducted by the local distribution network operator (DNO) for South West and South Wales of UK. This work for the first time provides the visibility of voltage distributions at LV network which previously was impossible due to lack of metering equipment. The voltage distributions are divided into two scenarios: over and under statutory limits. The paper firstly identifies the voltage magnitude distributions, which are then linked with locations and load compositions. Both voltages at substations and at feeder ends are investigated to discuss voltage control strategy and understand the capability to accommodate low carbon technologies. The work complements the current practice of understanding the conditions of LV networks that are not properly monitor from voltage aspect.