In electrical networks of almost all voltage classes, the main link in work on transmission energy is a power transformer. At moment, about 60% them are operated our country with significant excess service life, which increases requirements for their technical control and diagnostics units. Switching devices an integral part transformers. They necessary to regulate substation busbars depending ...

This paper presents a new technique for the voltage regulation of a radial medium voltage (MV) distribution grid in presence of distributed generation (DG) units. The proposed technique consists of the coordinated action of on-load tap changer (OLTC) of transformer and reactive power compensation by D-STATCOM. Managing the system voltage using the action of OLTC is one of the most common ways f...

This paper discusses the implementation of a fuzzy logic based coordinated voltage control for a distribution system connected with distributed generations (DGs). The connection of DGs has created a challenge for the distribution network operators to keep the voltage in the system within its acceptable limits. Intelligent centralized or coordinated voltage control schemes have proven to be more...

DUKE ENERGY-CAROLINAS HAS EMBARKED ON A MAJOR INITIATIVE TO IMPROVE THE VISIBILITY AND CONTROL OF ITS DISTRIBUTION SYSTEM. Known as the Remote Operation and Access to the Distribution System (ROADS) project, this initiative will provide Duke’s power-delivery organization with remote access to intelligent electronic devices (IEDs) within distribution substations and out on the feeders they serve...

Distribution smart grid is very important part of the smart grid. Utilities use Distribution Management System (DMS) as supervisory control layer at the power system control centers. State Estimation (SE) and Volt-Var Control (VVC) are the prime applications of the DMS. In the modern DMS, SE is required for extensive monitoring and control of the entire distribution network. In the presence of ...

The Modular multilevel converters (MMCs) have excellent performance when operated with high modulation index such as the case of gird-connected in voltage direct current (HVDC) system. Reliable and fault tolerant operation (FTO) system is very important HVDC. A novel FTO algorithm under sub module failure without using any additional redundant SMs proposed. In proposed method, bus control on-lo...

Abstract With the massive distributed photovoltaic resources and multi-load connected to distribution network, network loss energy consumption have become two of most important issues. To solve this problem, an conservation reduction optimization strategy for active (ADN) considering voltage (CVR) is proposed. First, probability density output prediction error fitted by Gaussian mixture model (...

Abstract Aiming at a fault on service duty test of vacuum on-load tap changer (OLTC), the principle resonance method is analyzed. Combined with voltage and current waveform measured standard switching sequence, cause process are qualitatively deduced. Based theoretical analysis, simulation model circuit built based PSCAD. The waveforms obtained by highly consistent waveforms. error peak between...

Optimal Power Flow (OPF) problem in electrical power system is considered as a constrained nonlinear, single objective or multiobjective optimization problem with multiple variables and multiple constraints. As the Power Transmission companies have been moving into much more competitive markets , this necessitates the implementation of Optimal Power Flow Programs for both, the planning and oper...

Transformator merupakan salah satu peralatan yang sangat penting dalam sistem tenaga listrik. Fungsi utama transformator adalah sebagai penyalur daya atau tegangan, serta mengubah level tegangan dari ke lain. dilakukan penelitian BAT GT 2.1 PLTGU Priok digunakan untuk step up keluaran generator menuju jaringan transmisi. Penelitian kondisi kesehatan dan predikasi umur supaya diketahui bagaimana...