Non-technical electricity losses due to anomalies or frauds are accountable for important revenue in power utilities. Recent advances have been made this area, fostered by the roll-out of smart meters. In paper, we propose a methodology non-technical loss detection using supervised learning. The has developed and tested on real meter data all industrial commercial customers Endesa. This uses information meters record (energy consumption, alarms electrical magnitudes) obtain an in-depth...

Non-technical losses (NTL) in electricity utilities are responsible for major revenue losses. In this paper, we propose a novel end-to-end solution to self-learn the features detecting anomalies and frauds smart meters using hybrid deep neural network. The network is fed with simple raw data, removing need of handcrafted feature engineering. proposed architecture consists long short-term memory multi-layer perceptrons first analyses daily energy consumption history whilst second one...

With the continuous increase in number and relevance of electric transmission lines distribution networks, there is a higher exposure to magnetic fields generated by them, leading more cases human electrosensitivity, which greatly necessitates design development field mitigation procedures and, at same time, need minimize both performance degradation deterioration efficiency as well. During last four decades, fruitful results have been reported about extremely low frequency mitigation,...

This paper analyzes the thermal effects derived from use of different screen shapes when shielding magnetic field generated by underground power cables. A parametric analysis is developed to show influence geometrical and electrical parameters shield on maximum temperature achieved cables in order analyze impact this technique ampacity line. 2-D finite element approach employed study verify performance types screens (horizontal plate, reverse-U, H-layout) terms efficiency, overheating...

This paper presents a systematic semi-heuristic method to locate the most effective passive shield with aim of mitigating magnetic field generated from overhead power lines, at both sides line. As an example, is applied two different phase arrangements used frequently in EHV: flat and double-circuit vertical, shields single loop (two conductors), loops common conductor (three or separate (four conductors). Numerical results mitigation, obtained solutions further discussion, are also provided.

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> High-temperature low-sag (HTLS) conductors, which can double the ampacity of conventional are becoming a mature option to uprate thermally limited transmission lines. This paper addresses several issues related widespread use HTLS conductors in existing power systems. The first part analyzes influence higher line resistances on transfer capability as well accuracy network models, based constant...

This paper analyzes different ways to simulate electromagnetically three-core armored cables in 3D by means of the finite element method. Full periodic models, as lengthy 36 m, are developed evaluate accuracy when simulating only a small portion cable, commonly employed literature. The adequate length and boundary conditions for having same full models also studied. To this aim, five medium voltage high analyzed, obtaining minimum cable that may be simulated accurate results shorter time...

The Modified Winding Function Theory (MWFTh), regarded as a very powerful and general theory, has been extensively used for the last 15 years.This paper performs an in-depth review of mathematical physical framework on which MWFTh is based, showing that it indeed well suited to analyse machines with small air gaps arbitrary shape.However, contrary what usually stated in literature, also proved its formulae fail when applied large gaps.This major finding deduced from two different approaches,...

In this paper, an in-depth analysis of the possibilities mitigating magnetic field generated from typical overhead power lines by use compensated passive loops is presented. Typical conductor arrangements (flat, alternate, and super-bundle) for distribution, subtransmission, transmission levels are compared, regarding loops' characteristics (arrangement, dimensions, parametric sensibility analysis) mitigation effectiveness in two different situations interest area: at one side (unilateral)...

This paper analyzes the possibility of using compensated passive loops to obtain a high mitigation effectiveness magnetic field generated by underground single-core cables. With that aim, several arrangements are simulated in case study, including new ones called enchained loops, whose geometry reminds short-circuited conductors at both ends, but with advantage requiring smaller compensating capacitors. The results show drastic spot reduction configurations, drawback sensitivity parameters....

In this paper an in-depth parametric analysis of shielding effectiveness obtained when using ferromagnetic or conductive screens to mitigate the field generated by duct banks is presented.Due need a case-by-case approach, all simulations, performed finite element software (GetDp), are applied case study composed 9 (3 × 3) ducts, with six them including high voltage single-core cables and three left empty for eventual future expansion.Two geometries tested: horizontal U-reverse, changing in...

This work presents a framework allowing the huge amount of data currently available at substations to be locally processed and filtered before being transmitted energy management system. The proposed approach is based on application three-phase state estimator (SE) substation level. In order check topology, individual switching elements are modeled following ideas recently introduced by generalized SE paradigm. Such detailed model allows in turn use many more sets measurements, like those...

The great expansion in offshore power plants is raising the concern regarding cumulative effect of electromagnetic field emissions caused by submarine cables. In this sense, owners are required to predict these during permitting and consenting process new plants. This a challenging task, especially case HVAC three-core armored cables due their complex geometry. Customarily, 2D approaches based on finite element method (FEM) have been employed for evaluating magnetic However, inaccurate...

In this paper two typical arrangements of underground single-core high voltage three-phase power cables (flat and trefoil protected by PVC pipes) inside a closed shield three different materials (low-carbon steel, non-oriented grain steel aluminium) are analysed.The has components: U-shaped base flat plate (cover) located on top the base.Whereas most previous papers subject only dealt with degree mitigation obtained each material, paper, in addition to also addressing issue, mainly focusses...

Loss allocation through analytical expressions in three-core lead-sheathed armored cables is challenging due to the complex geometry of this type cable, commonly employed submarine energy transmission systems (involving twisted conductors, sheaths and armor). Most IEC standard 60287 have not been properly adapted for cables, leading inaccurate values different losses, so important efforts are currently devoted improving them. In work, an improved ultra-shortened 3D finite element model (FEM)...