The energy transition towards increased electric power production from renewable (RE) resources creates new challenges to ensure the stability of grids. In conventional grids voltage fluctuations can be controlled locally. Here, it is explored whether this may changed by transition. It well established that increase RE in increases amplitude frequency deviations and velocity with which these sp...

This paper investigates voltage fluctuations caused by the operation of battery energy storage (BES) units which provide frequency response (FR) and fast (FFR) services using a test network based on typical part United Kingdom (UK) mainland system. provides an overview current FR/FFR currently used in UK, summary their modes operation. Using DIgSILENT Powerfactory, introduces simple disturbance...

In the last few years, renewable energies became more socially and economically relevant, among them, photovoltaic systems stand out. Residential self-consumption of electricity is a field with great potential, implementation grid-connected (GCPS) in full rise. The installation distributed generation residential environments could alter performance low-voltage distribution networks, since these...

The variable background harmonic data and incomplete phasor information make multi-harmonic source responsibility division in three-phase symmetrical power system a significant challenge. In this paper, selection method based on canonical correlation analysis is proposed to deal with without information. Firstly, the coefficient between voltage current used characterize fluctuations of voltage....

We report a systematic experimental study of mesoscopic conductance fluctuations in superconductor/normal/superconductor (SNS) devices Nb/InAs-nanowire/Nb. These fluctuations far exceed their value in the normal state and strongly depend on temperature even in the low-temperature regime. This dependence is attributed to high sensitivity of perfectly conducting channels to dephasing and the SNS ...

Electrical properties of gap-junction connected cells (input voltage and length constant) are shown to depend strongly on fluctuations in membrane and contact conductances. This opens new possibilities and incorporates a further difficulty to the analysis of electrophysiological data, since four, instead of two, parameters (the average values and the magnitude of fluctuations of the two conduct...

We study a voltage-controlled version of the superconducting flux qubit [Chiorescu et al., Science 299, 1869 (2003)] and show that full control of qubit rotations on the entire Bloch sphere can be achieved. Circuit graph theory is used to study a setup where voltage sources are attached to the two superconducting islands formed between the three Josephson junctions in the flux qubit. Applying a...

The fast and coordinated voltage control of distributed nodes inside a large scale wind farm is a stringent issue. To achieve the reactive power compensation without a dedicated upper communication system, this paper proposes a relative control strategy based on the local reactive power regulation. This method can realize the voltage coordination of the key equipment and feeder line nodes, on t...

Parameter variations have become a dominant challenge in microprocessor design. Voltage variation is especially daunting because it happens rapidly. We measure and characterize voltage variation in a running Intel R © CoreTM2 Duo processor. By sensing on-die voltage as the processor runs single-threaded, multithreaded, and multi-program workloads, we determine the average supply voltage swing o...