It gives me great pleasure to submit my report prepared during my internship at Dhaka Power Distribution Company Limited (DPDC). The internship gave me a great opportunity to experience a real-life development environment, modern technology and techniques. In this report I have tried to summarize what I did and experienced during my internship at Dhaka Power Distribution Company Limited. I express my sincere gratitude and thanks to my co-supervisor K.B.M. Rakib Hasan for constantly guiding me in the successful completion of the internship report.
This is to confirm that this internship titled "Study on Tariff and Energy Revision of DPDC" has been carried out by the following students under my direct supervision and this work has been carried out by the laboratories of the Department of Electrical and Electrical Engineering under the Faculty of Engineering by Daffodil International University in partial fulfillment of the requirements for the degree of Bachelor of Science in Electrical and Electronics Engineering. Yasin Arafat Id No Session: Fall 2019 has been accepted as satisfactory in partial fulfillment of the requirements for the degree of Bachelor of Science in Electrical and Electronic Engineering in 2019.
LIST OF TABLES
IEEE Institute of Electrical and Electronics Engineer BERC Bangladesh Energy Regulatory Commission LTV low voltage voltage. MTV Medium Voltage Voltage EHV Extra High Voltage AIS Air Insulated Switchgear GIS Gas Insulated Switchgear.
ACKNOWLEDGEMENTS
ABSTRACT
INTRODUCTION
- Structure of power sector
- Apex institution
- Regulator
- Generation
- Transmission
- Distribution
- Broad Objective
- Dhaka Power Distribution Company Limited (DPDC)
- VISION of DPDC
- MISSION of DPDC
- COMMITMENT
- CORE OBJECTIVES
- Methodology
- Future plans of DPDC
The broader objective of this research is mainly to understand each distribution substation equipment and tariff and energy review of DPDC. Dhaka Power Distribution Company Limited (DPDC) was incorporated on 25 October 2005 under the Companies Act, 1994. The company was licensed on 25 October 2005 and commenced operations on 14 May 2007.
Company started its commercial operations on 1 July 2008 by taking over all assets and liabilities from the then DESA. Provide quality and reliable electricity to the people of Dhaka city and Narayangonj area for the desired economy, social and human development of the country. The work of this article was carried out with the help of different sources.
In the planning, the paper was whistled by the approved men of SCADA Bhaban, DPDC. Upgrading the power factor with 850 MVR reactive power compensation at 132 KV and 33 KV voltage levels.
TARIFF
- Introduction
- Objective of Tariff
- Considerations for the proposed tariff
- The rationale for the tariff adjustment proposal
- Desirable Characteristics of a Tariff
- Proper return
- Fairness
- Simplicity
- Reasonable profit
- Attractive
- Types of Tariff
- Simple tariff
- Block rate tariff
- Two part tariff
- Power factor tariff
- Tariff Rate
- Low Voltage (LT) 230/400 Volt
- Tariff Retail Rate for 2019-2020 Consumer Category Existing Tariff
The rate should be with the end goal of guaranteeing the best possible return from each customer. The rate must be reasonable so that various types of customers are satisfied with the charging rate of electrical energy. The rate should be basic with the goal that a conventional customer can simply get it.
The tariff should be attractive in order to encourage a large number of consumers to use electricity. Efforts should be made to adjust the fee in such a way that customers can pay effectively. When there is a fixed rate per unit of energy consumed, it is known as flat rate.
When different types of customers are charged at different uniform per unit rates, it is known as a flat rate. At the time the rate of electric energy is charged based on the most extreme demand of the customer and the units consumed, it is known as two-part tariff.
Distribution Cost with System Loss Curve
Distribution Cost with system Loss(TK/KWH)
ENERGY AUDIT
Introduction
Importance of energy audit
Benefits of energy audit
Energy audit process
Substations list of DPDC
- Jigatola 33/11KV, 3 x 10/14 MVA Substation (north)
- Kamrangirchar 33/11KV, 4 x 10/14 MVA Substation
- Japan Garden 33/11 KV, 2X10/14 MVA SUBSTATION (NORTH)
- LALBAGH 132/33 KV S/S
- FATULLAH 33/11KV, 4 X 10/14 MVA SUBSTATION
- BIDDUT BHABON 33/11 KV S/S NORTH -1
- BSMMU 33/11 KV, 2*28/35 MVA GIS SUBSTATION (NORTH 1)
Calculation
SUPERVISORY CONTROL AND DATA ACQUISITION)
- SCADA
- Purposes of SCADA
- Scope of SCADA
- Demand Side Management
- Distribution Planning (Integration with GIS)
- Overview of SCADA System
- Summary of Control Room Equipment
- Remote Workstations Equipment
- SCADA Pilot Project in 5 Sub-Stations
- Reactive Power and Voltage Management
- Distribution Operation Management
- Summary of Revised Price Proposal of SCADA
- Azimpur (33/11 kV)
- SCADA for DPDC (Implementation)
- Upgraded SCADA system in 2 steps 1. SCADA project delivery
- Separate project
- Benefits from Pilot and beyond (MV/LV control and visualization)
- Intranet Connection
- Benefit of SCADA
Controlling the capacitor banks and voltage regulators to provide good voltage in real time.
DIGITALIZATION AND AUTOMATION OF SUB STATION METERING SYSTEM
DASMS)
- Digitalization and Automation of Sub Station Metering System (DASMS)
- Intention of Digitalization and Automation of Sub Station Metering System
- DPDC controls every substations from one point
- Control Diagram of Digitalization and Automation of Sub Station Metering System
- OPERATION OF DASMS
- SCOPE OF (DASMS)
- Comparison of DASMS, GIS & SCADA
Cloud VPN is a kind of VPN that uses a cloud-based system base to transfer VPN administrations. All the substations connected to a central server (web based). Now central server connected to VPN cloud and internet cloud connected to central server.
Sub-Station Energy Balancing
Cumulative Load Profile
Supervisory Control
Benefit of Digitalization and Automation of Sub Station Metering System (DASMS)
The power factor of DPDC network can be improved by establishing customer and feeder based capacitor bank. For the sake of accurate energy accounting, information about CT-PT shutdown of a feeder, change of source, change of phase sequence, etc. It will be possible to calculate the magnitude of losses in different sections of the line and the substation.
METERING SYSTEM
- Introduction of Metering System
- Energy Meter
- Importance of Energy Meter
- Visibility
- Savings
- Accuracy
- Types of Energy Meter
- Substation Meter or Grid Meter .1 Four Quadrant Meter
- Application
- Active Energy
- Reactive Energy
- Working Principle
- Communication interfaces
- Metering information
- Consumer Meter
- Analog Energy Meter
- Digital Energy Meter
- Prepaid Energy Meter
Smart meters send accurate data to the electricity supply organization, eliminating the need for estimation. At the point where the edge between the voltage and the active current segment is 0 degrees, the power flow is considered "active import". All energy recorded by the energy meter for this type of intensity current is recorded as
The quadrants characterized in IEC for active energy import are 1 and 4. At the point where the angle between the voltage and the active current component is 180 degrees, the current flow is considered “active export”. All energy recorded by the energy meter for this type of intensity current is recorded as “active export energy”. When the angle between the voltage and the reactive current component is π/2 degrees, the current flow is considered “reactive import”.
All power recorded by the vitality meter for this type of power flow is recorded as "reactive energy import". At the point where the angle between the voltage and the reactive component of the current is 270 degrees, the power flow is said to be "reactive export". All energy recorded by the meter for this type of electricity is recorded as "active export energy".
In Quadrant 1: Active energy is considered input, reactive energy is considered input. In Quadrant 2: Active energy is considered input, but reactive energy is considered output. In Quadrant 3: Active energy is considered output, reactive energy is additionally considered emitted.
In Quadrant 4: Active energy is considered emitted or exported, but receiving energy is considered import. All information recorded by the meter is displayed in a customer-friendly manner on the LCD screen according to the OBIS standard. An electricity meter is a device that calculates the electrical energy consumed by consumer-powered appliances.
Types of Prepaid meter
Customer stops paying for electricity, the electricity supply is turned off by a relay mounted in the meter. The advantage of these types of meters is that you can estimate how much electricity you use by paying for it before you use it.
CONCLUSION
Discussion
Problems
