in this article, a multi-objective function for placement of distributed generation (dg) and capacitors with thetap setting of under load tap changer (ultc) transformer is introduced. most of the recent articles have paidless attention to dg, capacitor placement and ultc effects in the distribution network simultaneously. insimulations, a comparison between different modes was carried out with,...

• A new OLTC transformer modeling technique is proposed. Taps are modelled as equivalent current sources. Power flow analysis significantly accelerated. Applicable to 3-wire medium voltage and 4-wire multigrounded low networks. This short communication presents a comprehensive model of on-load tap-changer (OLTC) transformers that connects (MV) with (LV) The proposed enables the inclusion MV net...

This paper describes the design of a load tap changer (LTC) control for up to four parallel transformers using a modified circulating current approach. The LTC control discussed in this paper was implemented using programmable logic, math functions, and IEC 61850 communications over fiber-optic Ethernet. One LTC control is associated with each transformer. The current angle from each LTC contro...

The on-load tap changing (OLTC) regulators have been widely used since the introduction of electrical energy. They ensure a good regulation of the output voltage in presence of large variations of the input voltage with typical response time from several mili-seconds to several seconds. Earlier mechanical type of on load tap changers were into practice. But they had considerable limitations and...

Abstract This article analyzes the cause of an abnormal defect in oil chromatogram a transformer, and puts forward control measures suggestions. It is analyzed that phase A B main transformer poor contact o f dynamic static contacts unloaded tap changer, high temperature overheatin g, development ablation, resulting chromatogram. The ablation no-load tap-changer may be due to installation trans...

This paper analyzes multiple active management (AM) techniques of active distribution network (ADN), and proposes an optimal coordination model of intermittent distributed generation (IDG) accommodation considering the timing characteristic of load and IDG. The objective of the model is to maximize the daily amount of IDG accommodation under the uncertainties of IDG and load. Various active man...