11 kv distribution system pdf

Abstract the thesis deals with the analysis of construction of power lines and substation switchyard of 33 11 kv. Electrical substations can also be divided into public and private substations. Major generating stations via the transmission and distribution networks i. This figure shows a simple power system with typical voltage levels from generation to consumption.

No description of technical parameter unit data 1 nominal system voltage kv rms 33kv 2 maximum system voltage kv rms 36. Distribution system a case study thank you entirely much for downloading a fault analysis of 11kv distribution system a case study. Distribution automation handbook prototype elements of power d istribution systems 1mrs757959 4 3 elements of power distribution systems 3. Pdf load flow analysis of 2 11 kv distribution sub. Nominal system voltage kv highest system voltage kv phase and earth mm between phases mm safety clearance mm ground clearance mm 11 12. Design study for 3311 kv substation, distribution and protection in. Chapter iv system planning, design, construction, and protection nei electric power engineering page iv5 figure iv3 two 34. The nominal design voltage magnitude between any two phase wires is 11 kv or 11,000 volts. Reliability is a key aspect of power system design and planning. Guidelines for distribution utilities for development of distribution. Apr 23, 2015 design and analysis of 11 kv distribution system using etap software abstract.

Special requirement sections if there are no special requirements, indicate none 2. As medium voltage cable specialists, our experts in the cable lab can advise on the most appropriate cable for your application and the correlating accessories for the installation environment. Design study for 33 11 kv substation, distribution and protection in the city of kenya. Complete 11 kv assemblies final 012016 electricity. Fig 37 represents the pow er factor profile of the top 5 distribution circles by number of consumers accounting for 86 nos. Photo by nei unitil system distribution system in this report, the distribution system will. It is that part of an ac distribution system which operates at somewhat higher voltages than general residential consumer utilization.

Types of electrical protection relays or protective relays. Complete 11 kv assemblies final 012016 free download as powerpoint presentation. The voltage level of a distribution system can be anywhere from about 5 kv to as high as 35 kv with the most common voltages in the 15 kv class. Design and analysis of 11 kv distribution system using etap software abstract. Therefore, its failures affect customer service more directly than, for example, failures on the transmission and generating systems, which usually do not cause customer service. A fault analysis of 11kv distribution system american journal of. For the 33kv distribution system, two feeders were taken and the 11kv for a period of seven years 20072012 as tabulated in tables 1.

Optimum placement of fault current limiter in 11 kv. This catalog provides features and ordering information for eaton s cooper power series cleer loadbreak connector system which is a 600 a loadbreak device rated for operation on 25 kv class systems and is used to provide a visible break and visible ground on 600 a network and distribution systems without having to remove 600 a terminations and. Junctions looping or tapping or sectionalizing eaton. Distribution of electricity involves the transfer of electrical energy from one electric substation to another electrical substation like from 22033 kv ss to 3311 kv ss and 3311 kv ss to 110. Maybe you have knowledge that, people have see numerous time for their favorite books subsequently this a fault analysis of 11kv distribution system a case study, but end in the works in harmful downloads. Standard for distribution line design overhead i standard stnw3361 ver 2 ergon energy corporation limited abn 50 087 646 062 revision history revision date version number author description of changerevision 19052014 1.

Feeder bifurcation and re conductoring techniques are adopted for loss optimization of distribution network. Distribution substations connect to the transmission system and lower the transmission voltage to medium voltage ranging between 2 kv and 35 kv with the use of transformers. Rated lighting impulse withstands voltage for fuse. Calculation of esdd02006 system fault levels issue no. Guidelines for substation and power distribution systems. The typical voltage of the subtransmission system is between 8 and 69 kv. Item 11 kv distribution 33 kv distribution transformers transformers 1 system voltage max.

In high load density areas, the subtransmission system uses a network configuration that is similar to the high voltage network. Distribution transformers 11 kv230 v and 11 kv central. Pdf intelligent load monitoring system of 11kv440v multi. Inside, all terminations are covered with insulating rubber that is grounded. Embedded generators connected to the local network 3. To overcome the under voltage at the 11kv, 33kv feeder buses and 2 kv buses capacitor bank of suitable ratings are added. The subtransmission system connects the highvoltage substations to the distribution substations. The distribution system of a power supply system is the closest one to the customer. For example, an insulator of voltage class 15 kv may utilized in a 12. Pin type insulator can be one part, two parts or three parts type, depending upon application voltage in a 11 kv system we generally use one part type insulator where whole pin insulator is one piece of properly shaped porcelain or glass. The maximum rating of 11kv circuit breaker is assumed as per available data sheet from manufacturer. Eatons vfi underground distribution switchgear provides a simple, economical approach to protective requirements for 5, 15, 25, and 35 kv underground systems. Primary distribution lines carry this medium voltage power to.

The results of this study find an application in the system improvement schemes. Our dno mv specialist can also provide assistance for idnos and power grid installers and contractors. Electric power is given by from primary distribution line i. Request pdf design and analysis of 11 kv distribution system using etap software this paper presents the design and loss optimization of distribution system.

Design and analysis of 11 kv distribution system using. Distribution networks solar pv impacts in energex 302,000 residential pv systems 1,044 mw of generation transformers with penetration levels above 30% high voltage on the lv network outside regulations reverse power flow on 11 kv feeders high neutral currents 100 amps 100 voltage enquiries per month. Transformer gets a vital role in transmission and distribution of electric power. Abstract the thesis deals with the analysis of construction of power lines and substation switchyard of 3311 kv. Jun 08, 2011 the distribution fuse cutouts shall be outdoor, open, dropout expulsion type fuse cutouts suitable for installation in 50 hz, 11 kv distribution system. When a fault occurs on the transmission or distribution system, the current which flows into the fault will be derived from a combination of three sources. Introduction the distribution system shown below illustrates many of the features of a distribution system making it unique. Standards of reference and statutory instruments voltage, quality of supply, shortcircuit power etc. Group 1 group 2 group 3 group 4 group 5 arrester rating arrester mcov. Photo by nei unitil system distribution system in this report, the distribution system will be defined as that portion of the electric system. The maximum rating of 11 kv sf6 or vaccum circuit breaker is assumed to be 4000 amps as allowable rated continuous current. For the 33 kv distribution system, two feeders were taken and the 11 kv for a period of seven years 20072012 as tabulated in tables 1.

Scholar, electrical and electronics engineering department, aisect university bhopal, mp, india. The deadfront construction of vfi switchgear improves safety for utility personnel and the general public. Design and analysis of 11 kv distribution system using etap. The system is three phase, 50 hz and power is to be distributed to consumers under nesco at appropriate voltage level via distribution substations, which operate at 33 11kv, 33 0. That would typically be a power line with three phases meaning that three wires are used to transmit power. Commonly used primary distribution voltages in most countries are 11 kv, 6.

Introduction electric power distribution is a vital link between utility and the consumer, thus playing a very important role in the entire power system. The existing 11 kv medium voltage distribution system in kathmandu valley is derived from these grid substations, with each substation having typically ten 11. To step down the 33kv primary voltage to 11kv suitable for distribution purpose. A fault analysis of 11kv distribution system a case study. Technical specification construction of 3311 kv primary sub.

Distribution substations michigan technological university. Vfi underground distribution switchgear cooper industries. There are four major distribution level voltage classes. Pdf stability analysis of power system in a 3311kv. The input for a distribution substation is typically at least two transmission or subtransmission lines. However, it is not commonly used as a distribution voltage to directly supply the low voltage network. Foreword this manual on electric power distribution systems is one of a series developed to aid utility supervisory personnel at shore establishments in the performance of their duties. This work aims to evaluate and improve the reliability of a power distribution network in. There are four major distributionlevel voltage classes. The aim of this research work is to carry out fault analysis of 11kv distribution power system. Electrical distribution is the final stage in the delivery of electricity.

Generation 13 kv transmission 8765 kv subtransmission 238 kv distribution 4. Improvement of power distribution system a few aspects. This document is about electricity distribution network and its different assemblies. However, for the sake of simplicity studies were carried out for efficiency improvement of distribution system in. Repair and maintenance of power distribution lines ncert. Design study for 33 11 kv substation, distribution and. System planning, design, construction, and protection. Design study for 3311 kv substation, distribution and. Guide for the implementation of earthing systems in user energy. Overload, voltage fluctuations and heating up of transformers. Primary distribution handles large consumers such as factories and industries.

Here urban power network is considered and 11kv feeder is designed and i 2 r losses are calculated. This paper presents the design and loss optimization of distribution system. Reducing the failures ensures an increased chance of uninterrupted power to be supplied to consumers. The substation would be a combination of switching, controlling, and voltage stepdown equipment arranged to reduce subtransmission voltage to primary distribution voltage for residential, commercial, and industrial loads. Pin insulators are the earliest developed overhead insulator, but are still commonly used in power networks up to 33 kv system. Conversion of the mechanical inertia of rotating plant equipment connected to the. In the event of voltage sag due to insufficient energy supply, equipments may malfunction or trip. The function of station earthing system is to provide a low resistance path for flow of earth fault currents for proper operation of protection. Unit substations up to 36 kv aluminum transformer, aluminum bus bars lvdp. The distribution systems network carries electricity from the transmission system and delivers it to consumers. The reliability study of 11kv distribution feeders. It connects the transmission system with secondary distribution network, at 33 kv or 11 kv voltage levels and form.

Electric power distribution is the final stage in the delivery of electric power. The first configuration of hvds system comprises of 11 kv ht bare. The data pertaining to distribution system parameters, switches, fcl locations etc. Load flow analysis of 2 11 kv distribution sub station using static var compensator for voltage enhancement a case study article pdf available november 2009 with 1,817 reads how we.