11 kv distribution system pdf

The deadfront construction of vfi switchgear improves safety for utility personnel and the general public. Major generating stations via the transmission and distribution networks i. Electric power is given by from primary distribution line i. 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. The nominal design voltage magnitude between any two phase wires is 11 kv or 11,000 volts. Improvement of power distribution system a few aspects. However, it is not commonly used as a distribution voltage to directly supply the low voltage network.

Item 11 kv distribution 33 kv distribution transformers transformers 1 system voltage max. The subtransmission system connects the highvoltage substations to the distribution substations. Junctions looping or tapping or sectionalizing eaton. 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. For the 33kv distribution system, two feeders were taken and the 11kv for a period of seven years 20072012 as tabulated in tables 1. 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. Pin insulators are the earliest developed overhead insulator, but are still commonly used in power networks up to 33 kv system. Chapter iv system planning, design, construction, and protection nei electric power engineering page iv5 figure iv3 two 34. Standards of reference and statutory instruments voltage, quality of supply, shortcircuit power etc. 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. The aim of this research work is to carry out fault analysis of 11kv distribution power system. 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. 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. Unit substations up to 36 kv aluminum transformer, aluminum bus bars lvdp.

The existing 11 kv medium voltage distribution system in kathmandu valley is derived from these grid substations, with each substation having typically ten 11. Introduction the distribution system shown below illustrates many of the features of a distribution system making it unique. 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. However, for the sake of simplicity studies were carried out for efficiency improvement of distribution system in. Distribution transformers 11 kv230 v and 11 kv central. The first configuration of hvds system comprises of 11 kv ht bare. To overcome the under voltage at the 11kv, 33kv feeder buses and 2 kv buses capacitor bank of suitable ratings are added. 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. Photo by nei unitil system distribution system in this report, the distribution system will be defined as that portion of the electric system.

Guidelines for distribution utilities for development of distribution. The distribution system of a power supply system is the closest one to the customer. Transformer gets a vital role in transmission and distribution of electric power. Pdf stability analysis of power system in a 3311kv. It is that part of an ac distribution system which operates at somewhat higher voltages than general residential consumer utilization. System planning, design, construction, and protection. 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. The data pertaining to distribution system parameters, switches, fcl locations etc. Eatons vfi underground distribution switchgear provides a simple, economical approach to protective requirements for 5, 15, 25, and 35 kv underground systems. Distribution system a case study thank you entirely much for downloading a fault analysis of 11kv distribution system a case study. The function of station earthing system is to provide a low resistance path for flow of earth fault currents for proper operation of protection. This document is about electricity distribution network and its different assemblies. Embedded generators connected to the local network 3. For example, an insulator of voltage class 15 kv may utilized in a 12.

Vfi underground distribution switchgear cooper industries. 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. Distribution of electricity involves the transfer of electrical energy from one electric substation to another electrical substation like from 22033 kv ss to 33 11 kv ss and 33 11 kv ss to 11 0. A fault analysis of 11kv distribution system a case study. Complete 11 kv assemblies final 012016 free download as powerpoint presentation. The 11 kv works include the integration of the new 6611 kv primary substations being built under the latest 66 kv transmission development plan 20072011 into the distribution networks. Photo by nei unitil system distribution system in this report, the distribution system will. This figure shows a simple power system with typical voltage levels from generation to consumption. 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. To step down the 33kv primary voltage to 11kv suitable for distribution purpose. No description of technical parameter unit data 1 nominal system voltage kv rms 33kv 2 maximum system voltage kv rms 36. Rated lighting impulse withstands voltage for fuse. 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.

This paper presents the design and loss optimization of distribution system. Design study for 3311 kv substation, distribution and. Electrical distribution is the final stage in the delivery of electricity. Abstract the thesis deals with the analysis of construction of power lines and substation switchyard of 3311 kv. 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. The distribution systems network carries electricity from the transmission system and delivers it to consumers. Design study for 3311 kv substation, distribution and protection in. Distribution automation handbook prototype elements of power d istribution systems 1mrs757959 4 3 elements of power distribution systems 3. Distribution substation a distribution substation transfers power from the transmission system to the distribution system of an area. Design study for 33 11 kv substation, distribution and protection in the city of kenya.

This work aims to evaluate and improve the reliability of a power distribution network in. Overload, voltage fluctuations and heating up of transformers. The maximum rating of 11 kv sf6 or vaccum circuit breaker is assumed to be 4000 amps as allowable rated continuous current. Request pdf design and analysis of 11 kv distribution system using etap software this paper presents the design and loss optimization of distribution system. Pdf intelligent load monitoring system of 11kv440v multi. Optimum placement of fault current limiter in 11 kv. Electrical substations can also be divided into public and private substations. There are four major distribution level voltage classes. Special requirement sections if there are no special requirements, indicate none 2. Design and analysis of 11 kv distribution system using etap. Design and analysis of 11 kv distribution system using. The reliability study of 11kv distribution feeders. Reliability is a key aspect of power system design and planning. There are four major distributionlevel voltage classes.

In the event of voltage sag due to insufficient energy supply, equipments may malfunction or trip. The distribution fuse cutouts shall be outdoor, open, dropout expulsion type fuse cutouts suitable for installation in 50 hz, 11 kv distribution system. Since the transmission system is typically rated from kv up to 700kv. Inside, all terminations are covered with insulating rubber that is grounded.

Our dno mv specialist can also provide assistance for idnos and power grid installers and contractors. Types of electrical protection relays or protective relays. Conversion of the mechanical inertia of rotating plant equipment connected to the. Calculation of esdd02006 system fault levels issue no. Primary distribution handles large consumers such as factories and industries. The results of this study find an application in the system improvement schemes. That would typically be a power line with three phases meaning that three wires are used to transmit power.

Reducing the failures ensures an increased chance of uninterrupted power to be supplied to consumers. Feeder bifurcation and re conductoring techniques are adopted for loss optimization of distribution network. Design study for 33 11 kv substation, distribution and. 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. The maximum rating of 11kv circuit breaker is assumed as per available data sheet from manufacturer. Distribution substations michigan technological university. Guidelines for substation and power distribution systems. Apr 23, 2015 design and analysis of 11 kv distribution system using etap software abstract.

In high load density areas, the subtransmission system uses a network configuration that is similar to the high voltage network. Scholar, electrical and electronics engineering department, aisect university bhopal, mp, india. The typical voltage of the subtransmission system is between 8 and 69 kv. 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. A study here was made of the accuracy of utility power system stability simulations, as affected by the complexity of the synchronous generator models and data used with the models. It connects the transmission system with secondary distribution network, at 33 kv or 11 kv voltage levels and form. Abstract the thesis deals with the analysis of construction of power lines and substation switchyard of 33 11 kv. Distribution voltages are typically medium voltage, between 2. Generation 13 kv transmission 8765 kv subtransmission 238 kv distribution 4. Commonly used primary distribution voltages in most countries are 11 kv, 6. Transmission 101 legislative news, studies and analysis.

Primary distribution lines carry this medium voltage power to. 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 input for a distribution substation is typically at least two transmission or subtransmission lines. Pdf load flow analysis of 2 11 kv distribution sub. 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. Here urban power network is considered and 11kv feeder is designed and i 2 r losses are calculated. Technical specification construction of 3311 kv primary sub. Repair and maintenance of power distribution lines ncert. Electric power distribution is the final stage in the delivery of electric power. A fault analysis of 11kv distribution system american journal of. This project is a major distribution project undertaken by esb international in bahrain and adds to the already impressive portfolio of esb internationals. 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.

Fig 37 represents the pow er factor profile of the top 5 distribution circles by number of consumers accounting for 86 nos. Technical guide the mvlv transformer substations abb group. Group 1 group 2 group 3 group 4 group 5 arrester rating arrester mcov. Design and analysis of 11 kv distribution system using etap software abstract. Nominal system voltage kv highest system voltage kv phase and earth mm between phases mm safety clearance mm ground clearance mm 11 12.