MGVCL

Latest Technology

RMU : CONCEPT OF RING DISTRIBUTION

The concept of Ring distribution was introduced to get the uninterrupted power supply even in the event of faults in the Ring feeders. The Ring main unit shall comprise of 2 nos. Fault make load break isolators and 1 no. switch fuse unit/circuit breaker. The isolators are connected in the ring while the SFU/breaker is utilized to protect the HT side of the transformer. The first step was to go for OIL based RMUs since the initial cost of the RMU could be fitted well within the budgets. The RMUs were installed and commissioned for important HT consumers and the concept of RING distribution was validated. This proved to be a major success in the city and consumers were very satisfied on the overall power situation. This was how the concept of RING MAIN DISTRIBUTION was first time established in the city. The power demand was growing and the no. of consumers were also growing with the time. This growth became exponential within last one year and the electrical network also became complex due to increased connections, size of the load transformers, fault level etc. Within the fixed geographical size MGVCL needed to cater to the increased demand with better efficiency. The right solution was to go with the time and bring in the latest technology in the system. The conventional overhead D.P. Structure System & Oil/VCB Brothers are load by new oil/SF6 RMUs. The performance is assessed and the results are very encouraging. Some of the major advantages achieved were:

This was a major breakthrough achieved by MGVCL and have now found the right product for the right application. MGVCL has taken these steps of modernization in the direction towards customer satisfaction and excellence. The thinking process and work is being extended further to look into the possibilities of underground network across he city with usage of Ring main technology.

Underground Cable Fault Location System

To achieve high level or economic development extensive electrification is required to meet the growing demand of widely spread industrial manufacturing enterprises and also of increasing domestic consumption. This is made possible by large & wide networks of U/G power cables of diff materials & of diff. voltages. Although U/G Cable system is considered to be reliable, but due to various reasons like manufacturing defects, improper transportation & storage of cables, improper installation techniques, various mechanical damages, corrosion damage, abnormal thermal stress, over loading of cable, aging of cables they got damaged. The Cable fault locating system focuses on localization & pinpointing of cable faults with the required accuracy and within economically justifiable time duration Working Principles : All cable fault locating systems are based on pulse reflection. When periodic pulses generated in the system are injected into the Cable Over Test., these are reflected back from those points in cable where there is change in impedance due to irregularities arises due to breaks shorts, and squeezes etc. COMPACT SYSTEM - Compact System is a U/G Cable fault locating system of Germany make mounted on TATA 407 VAN used for Both HT & LT Cables & up to 160 Km. of length.

For XLPE Cables VLF Unit is provided. With help of this system identification & route of cable can be found out This system Consists of Three main Components.Control Unit HV Unit.Cable drums Operation Modes :
1. Testing : DC Testing 80 KV. Voltage 0 to 80 KV. DC.IN = 15 ma.Cable up to 66 KV can be tested.
2. Relocation :
- Pulse Echo Method : This method is suitable for prelocating fault distance of open Ckt & short Ckt. Below (40 ohms) fault.
- Impulse Current Method : It is suitable for prelocating low resistive / high resistive. Intermittent fault in a cable. A capacitive discharge is made on faulty core at it’s fault point due to which the surge pulse is reflected from the fault point to testing end and it is carried through a fault location which is connected inductively to the circuitry through impulse current transformer by which the pulse is reflected from fault point to testing end till the capacitive energy is dissipated. The fault echoes can be seen on the CRT Screen of fault locator.
- Surge Voltage Method :Same as impulse current method reuses universal coupling device for higher rating cable.
- Burning (ARM plus Method) : Attempt is made to reduce fault resistance by burning.
3. Pin Pointing : It is necessary to pin point the exact location of the fault so that the existing cable can be repaired.

Identification of all network components & every consumer with geographical reference and their relationship – availability of information at the click of mouse.Integration of heterogeneous information and connecting activities based on geographic proximity.Developing IT enabled benchmark & scientific approach to maintenance activity of the Network Since MGVCL ’s network is overhead & visible the approach was sufficient to meet the requirements.Oracle database created for assets, consumers & GPS details Custom built software to meet MGVCL ’s functional requirements.A Rover with the base gives accurate location of poles, transformers etc. Above details fed into a computer to generate the electrical distribution networkMap is stored in digital form making it easy to maintain and update.Every consumer is identified as a distinct location on a feeder Every link from the sub-station to the consumer including lines, transformer centers is available. MGVCL has already implemented GIS system in 17 towns having population more than 30000.

The Major benefits of GIS system are:
Quick Rectification Of Faults
Trouble Call Center Identification Of Low Voltage
Identification Of High Losses
Energy Audit System Planning And Analysis Asset Management


ROVER	BASE STATION	SATELLITE

In order to meet the objectives and go upward in the value chain, MGVCL have taken various initiatives like enabling IT systems in all the business process, installing supervisory, remote monitoring and enterprise resource planning tools along with investments in communication , IT and modernization of distribution networks. SCADA as per present R-APDRP guidelines, SCADA / DMS system will include urban areas – towns and cities with population of more than 4, 00,000 & 350MUs annual input energy and it is considered under Part-A. The number of such potential towns in MGVCL is Vadodara City.
The SCADA system is already implemented in Vadodara city. The existing system is commissioned in year 2009. The work of upgration of SCADA in Vadodara city is under progress.
With the proposed SCADA/DMS systems under R-APDRP PART-A scheme along with planned investments under R-APDRP PART-B, it is expected to deliver highly reliable & improved quality supply to its consumers meeting various mandatory Standards of Operation(SOP) proposed by state regulatory board. During contingencies with help of real time monitoring and analysis functions remedial actions shall be taken by SCADA/DMS either by self designated rules or intelligence-in- response to system state at different operational constraints. The systems to be implemented shall have necessary scalability and adaptation to the future standards and regulations and shall be a step towards Smart Grid.

MGVCL Hi - Tech Laboratory
MGVCL, Hi - Tech Laboratory, Baroda is certified with an illustrious certificate of Accreditation by National Accreditation Board for Testing & Calibration Laboratories (NABL), New Delhi for Testing and Calibration of all type and class of energy meters/ Accuchecks/ERS conforming to Indian Standards since May-2007.	Test Rack of 20 PositionMTE Make Meter Test System
Brief Technical Specification of Fully Computerized Testing & Calibration equipments available at MGVCL, Hi-Tech Lab.	Test Rack of 3 Position Itron Make Meter Test System
MGVCL, Hi-Tech lab tests all type of Energy meters like Static, Electro-mechanical, ABT meters as per relevant IS. MGVCL, Hi- Tech Lab. has already tested more than 700 nos of ABT complaint meters from open access consumers of Gujarat and other States.	NABL Certificate for Calibration
MGVCL, Hi-Tech lab also performs calibration of all type of Accuchecks & Electronic Reference standards up 0.02 class of accuracy. MGVCL, Hi-Tech has calibrated the Accucheck/ERS of various DISCOM like MGVCL, PGVCL, DGVCL, and GETCO. MGVCL, Hi-Tech Lab has also calibrated the High precision Electronic Reference Standard of various consumers.	NABL Certificate for Testing
Test Bench	20 Position MTE, Germany make Test Bench	3 Position Itron, France make Test Bench
Reference Standard	0.05 Class MTE, Germany make ERS (PRS121.3)	0.02 Class Radian, USA make ERS (RD-31)
Current Range	1 mA to 120A	1 mA to 160A
Voltage Range	30V to 300V	45 to 320 V

For Further Details , please contact: Deputy Engineer (Hi-Tech Lab), 66 KV Vidyutnagar S/S compound, Diwalipura Char Rasta, Old Padra Road, Vadodara - 390 007. Ph. No. :- (0265) 2333346 E-mail:- lab.vwest@gebmail.com

The United States Agency for International Development (USAID) in collaboration with the Ministry of Power (MoP),Government of India conceived an innovative program aimed at accelerating the pace of reform in India 's electricity distribution sector with a special focus on improving the nation's rural energy supply situation. The goal of the Distribution Reform, Upgrades and Management (DRUM) Project is to improve the quality of electricity services in India .While it will focus on the entire distribution sector, DRUM views rural electrification as key to a sustainable solution for India 's electricity supply problems.USAID has organized a team with unique mix of specialized skills and experience to implement DRUM. A core focus area calls for the development of a rural electrification strategy based on the successful experience in the US . A team from the US Rural Utilities Service (RUS) will join with India 's Rural Electrification Corporation (REC) to advise on this and related matters. Other major components of the DRUM initiative include pilot projects to create centers of excellence. DRUM also has an ambitious training component with an extensive array of specialized programs focused on electricity distribution. An allied program will address unique aspects of the water-energy nexus.

Background and Perspective

DRUM Program The DRUM program assists MGVCL by helping MGVCL create a center of excellence. The center serves as a model to be both scaled up and replicated elsewhere in MGVCL (and other utilities). DRUM consists of technical assistance (TA), training needs assessment (TNA), and funding.

Pilot Site Profile

Umreth Taluka comprises one main town (Umreth) with 35 numbers of surrounding villages having a total of 226 square kilometers of service area.

R-APDRP

The R-APDRP program will cover urban areas – towns and cities with population of more than 30, 000. The projects under the scheme shall be taken up in two parts. Ministry of Power, Govt. of India, has launched the Restructured Accelerated Power Development and Reforms Programme (R-APDRP) in the XI Five year Plan. Power Finance Corporation Limited (PFCL) has been designated by GoI as the Nodal Agency for the programme. The programme spans from data acquisition at distribution level till monitoring of results of steps taken to provide an IT backbone and strengthening of the Electricity Distribution system across the Country under the programme. The objective of the programme is reduction of AT&C losses to 15% in project areas. The program is divided into two (2) parts Part-A and Part-B. Part-A will include projects for establishment of baseline data and IT applications like Meter Data Acquisition, Meter Reading, Billing, Collections, GIS, MIS, Energy Audit, New Connection, Disconnection, Customer Care Services, Web self service, etc. to get verified baseline AT&C losses as well as SCADA/DMS Implementation. Part-B will include distribution strengthening projects. The objective of reducing Aggregate Technical and Commercial (AT&C) losses in the project area can be achieved by plugging pilferage points, supply of quality power, faster identification of faults & early restoration of power, proper metering, strategic placement of capacitor banks & switches, proper planning and design of distribution network.

Part-A

shall include the projects for establishment of baseline data and IT applications.In MGVCL, total 17 towns covered under Part-A of R-APDRP. Name of 17 towns are: Anand, Nadiad, Umreth, Balasinor, Chaklasi, Kapadvanj, Khambat, Petlad, Mehmdabad, Borsad, Godhara, Dahod, Halol, Lunawada, Dabhoi, Padra, Baroda. All towns are integrated with Data Center.

Part-B

shall include the project of R&M activities. In MGVCL, total 12 towns covered under Part-B of R-APDRP. Name of 12 towns are: Balasinor, Chaklasi, Kapadvanj, Mehmdabad, Borsad, Godhara, Halol, Lunawada, Dabhoi, Padra, Anand & Dahod

Patent of Special Designed Transformer

PATENT FOR INVENTING IMPROVED SINGLE PHASE POWER SUPPLY SYSTEM GRANTED TO MGVCL
First time in the history of power distribution sector of India, Madhya Gujarat Vij Company Ltd. a state owned Power Distribution Company operating in central part of Gujarat, has achieved a revolutionary technology breakthrough by inventing “Improved Single Phase Power Supply System” known as Special Designed Transformer. The Patent Office of Government of India has granted a patent for this invention to MGVCL on 25.02.2010.

A team of Engineers of MGVCL and UGVCL had achieved a technology breakthrough and invented this “Special Design Transformer” in the year 2005. MGVCL had filed an application for getting the patent for this invention with the patent office of Government of India in 2005.

This invention “Improved Single Phase Power Supply System” known as Special Design Transformer (SDT) is a great technological breakthrough for extending single phase power supply for the residential use of farmers after the schedule hours of 3 phase supply for Agriculture Pumpsets. Such 3500 Improved Single Phase Power Supply system or Special Design Transformers are in use by state owned Distribution Companies of Gujarat giving uninterrupted power supply to the farmers residing far away from the main villages.