The tendencies and perspective directions of development modern digital devices relay protection automation (RPA) are considered. One the promising ways to develop control systems is fundamentally new algorithms for recognizing emergency modes. They work in accordance with triggering rule, which formed after processing results model experiments. These able simultaneously a large number features or mode parameters (current, voltage, resistance, phase, etc.). Thus, multidimensional. This...

The features of the dielectric rod defects and rod-electrod polymer insulators were investigated by using developed complex method contactless remote diagnostics high-voltage health, which includes initial detection local areas with elevated electric field gradients as well measurement a set partial discharges characteristics. radiation extra-large was detected investigated. According to results, diagram constructed for electro-physical processes that accompany emission discharges; reasons...

The complication of the structure, topology and composition future electrical networks is characterized by difficult-to-recognize circuit-mode situations requires modern methods for analyzing information parameters. growing trend digitizing signals in substations use IEC 61850 standard results a huge amount new data available at nodes network. development analysis detecting recognizing modes (normal emergency) are topical research issues. article explores approach to faulted section an...

For setting up automatic reclosing of combined cable and overhead power lines (COPL), the faulty line section must be determined with high accuracy. The pattern a surge process triggered by fault depends on location in line. By recording high-frequency transient components, it is possible to construct portrait, damaged can exactly recognizing corresponding portraits. article presents an algorithm for processing signals results its simulation portraits COPLs.

The trend towards the decentralization and decarbonization of energy sector stimulates adoption generation facilities based on renewable sources (RES) distributed (DG) that utilize secondary resources. Operation features DG facilities, such as a high speed electromechanical transient processes significant deviations power quality indicators from standard values, require improvement an increase in automation devices. Modern electroautomatic devices must determine operating regions (normal...

Development of Smart Grid and technology "Digital substation" makes increased requirements for automation relay protection devices. They become more complicated, expensive less reliable. New, inexpensive technologies fault location in intelligent networks are required. A new approach to the single-ended on transmission line is considered, based recognition electromagnetic traveling wave process occurring moment fault. The algorithm determining used. It uses mathematical apparatus correlation...

The issues of increasing the sensitivity and reliability multi-parameter relay protection by sharing more than one information feature (current module, voltage module phase, active reactive power) are considered. In this case, response parameters individual one-dimensional measuring fault detectors based on accumulation statistical data during simulation in Matlab / Similink software package determined. A method for combining signals to increase is proposed. organization logical part was...

The use of modern methods for determining the fault location (FL) on overhead power lines (OHРLs), which have high accuracy and speed, allows you to quickly find repair damage. Various physical principles algorithms calculating distance site damage are used in FL OHРLs devices from different manufacturers. Some emergency mode parameters (EMP), other measurement results based wave methods. Many random factors that determine magnitude error affect operation by EMP. Methods deterministic...

Current microprocessor-based relay protection and automation (RPA) devices supported by IEC 61850 provide access to a large amount of information on the protected or controlled electric power facility in real time. The issue using such (Big Data) order improve parameters technical modification intelligent electronic at digital substations remains unaddressed. Prerequisites arise for designing modern systems with new generation based algorithms. In particular, it is expedient develop...

The use of modern methods for determining the fault location (FL) on overhead power lines (OHPLs), which have high accuracy and speed, contributes to reliable operation systems. Various physical principles are used in FL devices OHPLs, as well various algorithms calculating distance FL. Some OHPLs emergency mode parameters (EMP); other measurement results based wave methods. Many random factors that determine magnitude error affect by EMP. Methods deterministic procedures well-known do not...

Abstract Often there are such modes of operation in the electric power systems where standard methods relay protection and automation become insufficiently effective. For example, typical for networks with distributed generation renewable energy sources. Today, task developing new digital methods, that have high technical excellence fully comply requirements IEC 61850, is relevant. A method organizing logical part multiparameter proposed, which improves its sensitivity. The based on...

The article proposes a new method for autoreclosing of combined overhead and cable power lines (OCPL) based on traveling wave methods, which allows to increase the reliability their protection. Determination faulted section is estimation level transient signals. This indicates simplicity reduced requirements corresponding digital processing algorithms. It shown that fault-induced during propagation line terminals attenuate in different way depending OCPL. ratio signal values at two ends OCPL...

Electric networks with distributed and renewable energy sources are characterized by a stochastic operating mode. In this regard, the existing traditional principles of operation relay protection automation not always effective. Methods combining travelling wave based (based on parameters emergency mode) protections considered, as well positive effect their combined application. The results analysis advantages presented. combination circuit solutions discussed. Simulation damages at various...

The application of combined overhead and cable power lines (OCPLs) 110 kV voltage rate higher call for new features system protection automation devices. One the most urgent is problem autoreclosing (AR) OCPL. or another solution to this significantly affects reliability efficiency OCPL operating. In many countries, both non-selective AR selective are used. A method based on traveling waves proposed, which increases automation. uses a special procedure wave pattern classification faulted...

The article addresses matters concerned with improving the sensitivity and reliability of multiparametric relay protection through combined use more than one information parameter (current modulus, voltage modulus phase, active reactive power). parameters at which individual measurement units produce a triggering output are determined based on accumulation statistical data in course simulation carried out using Matlab/Simulink software package. A method combining signals produced by...

Medium-voltage networks are characterized by a long length and high degree of wear. Isolation failed network section requires significant time expenditures, circumstance that makes accurate fast determination the fault location topical problem. In view specific features emergency modes in medium voltage networks, development precise algorithms for case single double ground faults involves certain difficulties. The arbitrary configuration electrical neutral grounding conditions, lack...

The paper describes a method for the model validation using signals of real oscillograms. accuracy is estimated by calculating correlation between and signals. simulation Parskaya-Sasovo 220 kV overhead transmission line was used. It found that should include not only simulated but also other elements. Another fact signal matching significantly influenced used processing method. shown in how different elements including affect result. Using described approach to validation, one can achieve...

In the coming years, a significant number of distributed generation (DG) facilities are expected to be commissioned in Russia. The massive introduction DG and microgeneration will lead emergence multitude previously absent circuit operating conditions, depending on consumption electricity at load nodes. For example, transient processes power districts with distinguished by an increased flow rate, as well deviations quality indicators. presence RG network can cause incorrect functioning...

The identification of fault locations (FL) on overhead power lines (OHPLs) in the shortest possible time allows for a reduction to shut down OHPLs case damage. This helps improve reliability systems. FL devices according emergency mode parameters (EMPs) are widely used, as they have lower cost. However, larger error than that record traveling wave processes. Most well-known algorithms OHPL by EMP assume uniform distribution resistivity along OHPL. In real conditions, this is not case....

Identification of fault locations (FL) on overhead power lines (OHPL) in the shortest possible time allows to reduce for shutting down OHPL case damage. This helps improve reliability systems. FL devices according emergency mode parameters (EMP) are widely used, as they have a lower cost. However, larger error than that record traveling wave processes. Most well-known algorithms by EMP assume uniform distribution resistivity along OHPL. In real conditions, this is not case. Application these...

It is difficult to develop precise algorithms for determining fault locations single-phase and double earth faults due the features of emergency modes in medium voltage networks 6-35 kV. The arbitrary configuration electrical complicates development universal and, as a rule, technical solutions are limited by need use one-way measurements mode parameters. article discusses new topology independent location that involve superposition method. application proposed justified results simulation...