ABSTRACT

Synchrophasor Technology is a power full tool in the Grid system for diagnosis and to know health of system. Synchrophasor is high speed real time synchronized measurement device used for finding ANY ABNORMALITIES IN Grid* This advanced technology has been globally accepted viz USA,CHINA JAPAN, BAZIL AND OTHER EUROPIAN COUNTRIES.IT HAS ALSO BEEN ADOPTED IN INDIAN GRID , only after Indian Grid code act 2010 passed in parliament. POWER GRID The, Nodal agency proposed to go in big way WAMS (Wide Area Measurement System) for the whole country. based on GPS (Global Positioning System ) Under pilot Project 4nos PMUs (Phasor Measurement Units) have been deployed North Grid at 4 locations VIZ (1) KANPUR (2)VINDHYACHAL (3) DADRI (4) MOGA ,400 KV SUBSTATIONS and is being monitored at NRLDC (North Region Load Dispatch Center)DELHI .The results are very much encouraging.

This paper describes Synchrophasor Technology and its advantages over present SCADA system and how Utilities can integrate Synchrophasor data in existing SCADA/EMS .WAMS technology using PMU units data is found instrumental in early warning system. It reduces the likely hood of power disturbance, false trips and cascade tripping leading towards, RELIABILITY OF GRID. FOUR years back, INDIA faced world worst BLACK OUT on 31st JULY 2012 affecting 60 corers population of grids in 21 States of N,NE East regional for more than 8 hrs .life was paralyzed in day time (13hrs to 21hrs).No effect was observed in west & South States. This technology is worldwide considered AS Effective Solution Towards Avoiding Future Black Outs Thus ITS Importance has been established . Other advantages of synchrophasor system also discussed in this paper.

KEY WORDS :

Synchrophasor Technology, Wams, Indian Grids URTDSM (Unified Real Time Dynamic System Measurements)

Name of the Authors:

Kiran Kumar Jain

1

Dr. J.Praveen 2

Dr.D.P.Kothari 3

1 FIE,(Ph.D) Prof at ELLENKI College of Engineering &Tech. Hyd1erabad ( INDIA ) 2PhD Prof&HOD Griet Nizamabad Road Ner Jntuh, Hyderabad

(TS) ( INDIA ) 3Ph.D) Director R&D Gaikwad-Patil Engineeing College , Nagpur

(MS). ( INDIA )

Advance Research Journal of Multi-Disciplinary Discoveries ISSN NO : 2456-1045

ISSN CODE: 2456-1045 (Online)

(ICV-EE/Impact Value): 2.31

(GIF) Impact Factor: 1.272

Copyright@IJF 2016

Journal Code: ARJMD/EE/V-7.0/I-1/C-7/NOV-2016

Website: www.journalresearchijf.com

Received: 16.11.2016

Accepted: 23.11.2016

Date of Publication: 30.11.2016

Page: 39-44

A unit of International Journal Foundation Page I 39

Citation of the Article

Research Article

SYNCHROPHASOR TECHNOLOGY IN INDIAN GRID SYSTEM AND URTDSM - PROGRAMME - A CASE STUDY

Dr. Jain K.K , Dr. Praveen J. & Dr.Kothari D.P. (2016, November 30). Synchrophasor Technology In Indian Grid System And Urtdsm - Programme - A Case Study. Advance Research Journal of Multidisciplinary Discoveries. Vol. 7.0, C7, PP. 39-44, ISSN-2456-1045. from http://www.journalresearchijf.com/

e

www.journalresearchijf.com I 07

I . INTRODUCTION

1.1 SYNCROPHASOR TECHNOLOGY THROUGH GPS SYSTEM

There are 24 Nos SATELLITES which are in 24 orbits at the distance of 16000 km from Earth and 6 orbits Are being viewed all time giving time accuracy of 1 micro seconds. The advent of SATELLITE based time keeping systems advances in computer technology have made possible protective relays sampling synchronization with 1 micro seconds. These relays can now provide synchronized Phasor measurements that eliminate the need to have different devices for protection, control and electrical power system analysis, for system wide application and traditional protection applications. System wise applications have different sampling & signal processing requirement than do traditional protection applications.

Connectivity: In PMU data are collected at (4x25) 100 times faster viz 25 datas in 1 second as against 1data in 4 second .

1.2 )PHASOR TECHNOLOGY FOR SYNCHROPHSOR

Synchrophasor are precise time synchronized measurement of certain parameters on electrical grid. Now available from grid monitoring device called PMUs. A Phasor is a Complex no That Represents Both Magnitude And Phase Angle of Voltage , Current AND Frequency . It Calculate. EACH Phasor measurement is against Universal time stemped AND is called SYNCHROPHASORS . PMUs operational Speed is nos 25(INDIA) And 30 in (USA ) as frequency is 50 hz in India & 60 hz in USA. Readings per Seconds compareing with 2 to 4 nos /per second .

1.3 ) VALUE AND PROMISES OF SYNCHROPHASOR

Presently SCADA System Observes The GRID Conditions 2 to 4 second per reading which is too slow to track Dynamic events on the grid they do not monitor key indicators,such as phase angles ,SCADA datas are not time synchronized nor time aliened also not sharing wide area across the grid thus scada does not give grid operations of real time, wide area visibility into what happing across the Region and inter (SCADA).

1.4 ) TECHNICAL STANDARDS

1 ) IEEEC37.118 COMMUNICATION PROTO CALLS FOR PMU

2 ) IEC- 61850

(3 ) IEC 1588

These Technical Standards have been recognised as a priority for Modernization are renewed time to time by the expert committee. New standard have been suggested for smart grid in OCT 2011.

Advance Research Journal of Multi-Disciplinary Discoveries ISSN NO : 2456-1045

A unit of International Journal Foundation Page I 40

What is expected from Synchrophsor Technology -Is used

to support real time and off line activities to enhance grid

Reliability Operation of bulk power system for 800 KV

HVDC and 1200 KV HVAC system.

II. REAL TIME OPERATION APPLICATIONS

2.1 RESOURSES INTEGATIONS WIND AND

2.2 SOLARSTATE ESTIMATION

2.3 WIDE AREA SIYUATIOONL AWARENES

2 4 VOLTAGES & CURRENT MONITORING AND TRACKING

2.5 FREQUENCY STABILITY MONITORING AND TRACKING

2.6 POWER OCILLATION MONITORING

2.7 ALARMING AND SETTINGS IN SYSTEM OPERATIONAL

LIMITS

2.8 DYNAMIC LINE RATING & CONGESTION MANAGEMENT

2.9 OUTAGE RESTORATION

2.10 OPERATIONAL PLANNING

III. PLANNINGS AND OFF LINE APPLICATIONS

3.1.BASE LINEING POWER SYSTEM PERFORMANCE

3.2 EVENT ANALYSIS

3.3 STATIC SYSTEM MODEL CALIBERATION AND

VALIDATION

3.4 DYNAMIC SYSTEM MODEL CALIBERATION AND

VALIDATION

3.5 SPEED PROTECTION SCHEME& ISLANDING

3.6 PRIMARI FREQUENCY RESPONSE

3.7 WADE AREA CONTROL

Syncrophasor Technology , today stands on the edge of

realizing full value for improving reliable grid operations.

IV. CHALLENGES SYNCHROPHASOR TECHNOLOGY

It has many advantages, however implementing it on a

large scale also poses many challenges. In India, the

project was first started on a pilot basis to obtain initial

experience of the technology and now it is being scaled up

in the upcoming scheme known

Unified Real Time Dynamic State Measurement Scheme

(URTDSM Scheme).

During the execution of pilot projects many challenges

were faced, which include: Selecting locations for PMU

placements Type of architecture required Setting up of

standards and compliances ensuring interoperability of

PMUs Availability and setting up of communication

infrastructure Developing tools for in-depth post facto

analysis event Detection Developing lucid visualizations for

system operators Integration of Synchrophasor technology

with SCADA Cyber Security Management & Compliance

Way-forward Initial experience with Synchrophasor pilot

project has been extremely beneficial and the analysis

Advance Research Journal of Multi-Disciplinary Discoveries ISSN NO : 2456-1045

carried out using Synchrophasor data is highly rewarding. It will be more beneficial to install PMUs throughout the country on all EHV and UHV substations. Currently, the PMUs are installed on the pilot/ demo basis. The pilot/demo projects have been extremely beneficial in obtaining the knowledge of difficulties involved in installation and communication of PMUs. With this platform, India is now fairly ready for large scale deployment of PMUs across the country. Under URTDSM scheme being implemented by POWERGRID, it is envisaged to deploy around 1700 PMUs throughout All India Grid with aim of enhanced visibility to the operator. Along-with advanced applications are also under development and efforts are going on at a fast pace to attain maximum benefits using synchrophasor.

V. INDIAN ELECTRICITY GRID CODE 2010 As per Indian Electricity Grid code 2010-clause no 4.6.2 The Reliable and efficient speech and Data Communication System shall be provided to facilitate necessary communication and data exchange, and supervision/control of the grid by the RLDC, under normal and abnormal conditions. All users, STUs and CTU shall provide systems to telemeter power system parameter such as flow, voltage and status of switches/transformer taps etc. in line with interface requirements and other guideline made available by The associated communication system