Download Database for Electrical Distribution Network

Database for Electrical Distribution
Network
Guide: Dr. N.D.R. Sharma
Group Number: 10
Project Number: 13
Project Members
Abhishek Dixit
Anubhav Agarwal
E Girish
Sandeep Chandna
(200101004)
(200101014)
(200101032)
(200101101)
Overview:
The goal of the project is to design a database management system for Electrical
Distribution Network. The system will store all the required information related to the
Distribution system and provide a user friendly GUI for retrieval of information. The
system stores information for various level of electricity distribution. The user should be
able to query the system and get information related to the distribution network. A user
can be any person in the control center or a consumer of electricity. Through this system,
we can track the distribution of electricity till the consumer level.
Some of the frequently asked queries:
 List of all feeders in a given substation
 List of all poles connected to a given distribution transformer
 List of all customers connected to a given pole
Overview of a Distribution System: The schematic diagram of a distribution network is
given below
Database Entities:
We have identified the following database entities which would help us to model
an electrical distribution network.
 Sub station
 Transformer
 Circuit breaker
 Feeder
 Section
 Sectionalizing switch
 Pole
 Customer
Electricity Flow:
Sub station (33/11 KV substation)
 Starting point of the distribution of power
 Has a step down transformer which steps down the incoming high voltage
to a lower voltage level
 Provides power on several feeders
 Consists of two circuit breakers, one on the high voltage side and the other
on the low voltage side.
Feeders and sections
 They are the carriers in a power distribution system and hence play a very
vital part in electrical distribution.
 Feeders are connected with a circuit breaker which controls the power
supply to a feeder.



The circuit breaker opens up the circuit, whenever a fault is detected on
the distribution network, and hence the feeders are disconnected from the
sub station.
Each feeder is divided into several sections. Each section is separated from
the other through a sectionalizing-switch. So, incase there is a fault with a
given section, the sectionalizing-switches on either sides of this section
open up preventing the fault of a given section to propagate to other
sections
Each section drives several transformers. These are the common 11
KV/440 V transformers which we see on roads. A transformer at this level
feeds power typically to about 4 – 5 lanes through several poles which are
the ones we see in front of our houses. A customer taps the power from
these poles
Database design:
1. Substation
Substation id
Location
Head
# of people
2. Transformer
Transformer Manufacture Cost Date Date of
Voltage Current # of Type Substation
id
of
maintenance rating
rating
taps
id
install
3. Distribution feeder
Feeder id
Current rating
Parent substation id
4. Neighboring feeder
Feeder id
Sub station id
5. Circuit Breaker
Circuit breaker
id
manufacture
6. Sectionalizing switch
Switch id
Voltage rating
Current rating
Type
7. Consumer
Connection
id
User name
Address
Contact #
Units
consumed
Pole #
8. Pole
Pole #
Address
Sub station id
9. Feeder voltage regulator
Feeder id
Rating
Date of
install
Date of
maintenance
Manufacture
Project Architecture
Controller
Input Processor
Query builder
Client
Interface
Database
connectivity
Query Processor
User Output
Client Interface Module:
Database
Substation id
This module takes care of mainly displaying the various options available to the
user, taking the query input and displaying the result to the user.
The interface will be done in Qt (Windows).
Administrator interface
The administrator will have the following facilities:
 view the information,
o give the list of all transformers
 modify existing information,
o change the rating of a particular device
 add new information, and
o add a new customer,
 delete any unnecessary information from the database
o remove a pole from a locality.
General User interface
The normal user will be provided with following feature:
 view the information by filling the query form, like
o give the list of all substations,
o give the list of customers connected to a given pole,
o give the rating of all distribution transformers
connected to a particular sub station.
Controller Module:
This module does the back-end processing of the data entered by the user and
executes user queries by connecting to the database.
This module consists mainly of
• Input Processor - It validates the user input (checking that there are no NULL
fields, illegal input like numbers in the name of a customer etc),
• Query Builder – It builds the exact query as required by the database depending
on the user input,
• Database connectivity – It handles all the login, password and all the other
connection overhead required to keep connected to the database,
• User output – It prepares the final output to be presented to the user.
Database:
This is a RDBMS (Relational Database Management System) MySQL
(Windows), which we use to store the data