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Reliability Analysis for Restricted and Un – Restricted Demand of Tamilnadu Power Grid for the Year 2014 Using Wasp-Iv

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Reliability Analysis for Restricted and Un – Restricted Demand of Tamilnadu Power Grid for the Year 2014 Using Wasp-Iv Research Manuscript Title RELIABILITY ANALYSIS FOR RESTRICTED AND UN – RESTRICTED DEMAND OF TAMILNADU POWER GRID FOR THE YEAR 2014 USING WASP-IV J.Booma1, K.Karunanithi2, K.Mahadevan3, S.Kannan4 (1&2)Assistant Professor/EEE, 3Professor/EEE, 4Professor and Head/EEE, (1&3)PSNA College of Engineering and Technology, Dindigul, Tamil Nadu, India. 2Kalasalingam University, Krishnankoil,Tamil Nadu, India. 4Ramco Institute of Technology, Rajapalayam, Tamil Nadu, India. E-Mail: [email protected] www.istpublications.com J.Booma Et.al.,” RELIABILITY ANALYSIS FOR RESTRICTED AND UN – RESTRICTED DEMAND OF TAMILNADU POWER GRID FOR THE YEAR 2014 USING WASP-IV”, International Journal of Future Innovative Science and Engineering Research (IJFISER) ISSN (Online): 2454- 1966, Volume-2, Issue-2, JUNE - 2016, Page-133 International Journal of Future Innovative Science and Engineering Research (IJFISER), Volume - 2, Issue – II, ISSN (Online): 2454- 1966 www.istpublications.com. RELIABILITY ANALYSIS FOR RESTRICTED AND UN – RESTRICTED DEMAND OF TAMILNADU POWER GRID FOR THE YEAR 2014 USING WASP-IV J.Booma1, K.Karunanithi2, K.Mahadevan3, S.Kannan4 (1&2)Assistant Professor/EEE, 3Professor/EEE, 4Professor and Head/EEE, (1&3)PSNA College of Engineering and Technology, Dindigul, Tamil Nadu, India. 2Kalasalingam University, Krishnankoil,Tamil Nadu, India. 4Ramco Institute of Technology, Rajapalayam, Tamil Nadu, India. E-Mail: [email protected] ABSTRACT The reliability of Tamil Nadu power grid is analyzed for the year 2014. In a power system, to ensure that, whether the total installed capacity is sufficient to meet the demand is identified by system reliability. Reliability indices are used as deciding criteria on new investments in generation capacities. Tamil Nadu has the highest renewable power penetration of 49% of the total installed capacity at the end of the year 2014. The reliability index, Energy Not Served (ENS) for every month of the year 2014 has been analyzed using Wien Automatic System Planning -IV (WASP-IV) package for both restricted and un-restricted peak demand of Tamil Nadu. Keywords: Energy not served, Reliability, Tamil Nadu, WASP-IV 1.INTRODUCTION The function of an electric power system is to provide electricity to its customers efficiently and with a reasonable assurance of continuity and quality [1]. Reliability is the probability of a device or system performing its function adequately, for the period of time intended, under the specified operating conditions [2]. The reliability of power supply is, related to the probability of providing customers with continuous service and with a voltage and frequency within prescribed ranges around the nominal values. Power systems reliability considers the performance of the system as a whole, considering generation facilities as well as the transmission network and the distribution grid. In this paper, only the reliability of generation capacity is analyzed. Providing additional generation capacity increases the reliability of power supply and adds value to the service, but it also costs money. A modern power system is complex, highly integrated and very large. Fortunately, the system can be divided into appropriate subsystems like generation, transmission and distribution. Reliability studies are carried out individually and in combinations of the three areas. The evaluation of transmission and distribution reliability is beyond the scope of this work. The actual degree of reliability experienced by a customer will vary from region to region. Different functional areas may offer different degrees of reliability. It is reported that southern region of India had the highest peak demand shortage of 14.5 MW and energy shortages of 10.5 MU for the financial year 2010-2011. [3]. Reliability indices, Loss of Load Probability (LOLP) and Energy Not Served (ENS) for Tamil Nadu, for the year 2012 were calculated using WASP-IV [4]. Tamil Nadu had the minimum peak shortage of 1.4% in August and September 2013 and maximum peak demand shortage of 17.9% in January 2013 and the minimum energy shortage of 1.5% in October 2013 and maximum energy shortage of 21.7% in January 2013 [5]. The average peak demand and energy shortage of the year 2013 had been calculated as 8.19% and 10.5% respectively. A climate - aware generation planning has been proposed for Tamil Nadu [6]. The performance J.Booma Et.al.,” RELIABILITY ANALYSIS FOR RESTRICTED AND UN – RESTRICTED DEMAND OF TAMILNADU POWER GRID FOR THE YEAR 2014 USING WASP-IV”, International Journal of Future Innovative Science and Engineering Research (IJFISER) ISSN (Online): 2454- 1966, Volume-2, Issue-2, JUNE - 2016, Page-134 International Journal of Future Innovative Science and Engineering Research (IJFISER), Volume - 2, Issue – II, ISSN (Online): 2454- 1966 www.istpublications.com. of various plants in Tamil Nadu was analyzed for the period 2004-2008 [7]. Tamil Nadu is the leading Indian state in grid-connected renewable, especially wind energy.. At the end of 2014 Tamil Nadu had 7206 MW installed wind power generation capacity [8]. In Tamil Nadu, two kinds of load demands are considered restricted demand and un- restricted demand. In this paper both demands are taken into account by considered two cases. In this paper, WASP-IV package has been used to analyse the reliability in terms of Energy Not Served (ENS) for Tamil Nadu for the year 2014. The rest of this paper is organized as follows: Chapter 2 describes overview of power sector in Tamil Nadu. Chapter 3 provides the implementation in WASP-IV. Chapter 4 provides results and discussion and Chapter 5 concludes. 2. TAMIL NADU POWER SECTOR-AN OVERVIEW Tamil Nadu Generation and Distribution Corporation Limited (TANGEDCO) is an electrical power generation and distribution public-sector-undertaking that is owned by the Government of Tamil Nadu .To satisfy the energy needs of the state, TANGEDCO has a total installed capacity of 21793 MW (at the end of December 2014) which includes shares from the State government, Central government and Independent Power Producers (IPP).The TANGEDCO operates four large thermal power stations (4770 MW): i. Ennore Thermal Power Station (ETPS) - 450 MW (2×60, 3×110 MW) ii. Mettur Thermal Power Station (MTPS) - 1440 MW (4×210, 1×600 MW) iii. North Chennai Thermal Power Station (NCTPS) 1830 MW (3×210, 2×600 MW) iv. Tuticorin Thermal Power Station (TTPS) - 1050 MW (5×210 MW) TANGEDCO has 42 numbers of hydro plants, with a total capacity of 2190 MW. TANGEDCO also has four gas turbine plants and its total capacity is 515 MW. Due to economic consideration these plants are operated only during peak hours. The share from central government is around 4177 MW (December 2014) which includes coal and nuclear plants. The state of Tamil Nadu has two monsoon seasons: south-west monsoon from June to September and the north-east monsoon from October to December. This distinctive feature helps Tamil Nadu to become a favored wind power destination because the monsoon winds contribute to the bulk of the annual wind power generation. Nearly 98% of wind power is generated by private power sectors. The private power sectors also operate the thermal plants of capacity 2065 MW (Gas 503 MW, Diesel 412 MW and Coal 1150 MW). For the past five years, Tamil Nadu has been facing massive power deficits hence the state is now facing huge power cuts. This power shortage affects all the sectors leading to loss in production and loss of income. In order to manage the power cuts, most of the domestic consumers are using the Uninterrupted Power Supply (UPS) system and commercial consumers are using mini Diesel/Kerosene generators and industrial consumers are using large diesel generators. Table I shows the various energy consuming sectors in Tamil Nadu [9]. Agricultural and commercial sectors consume 50% of total energy generation, 40% of energy is consumed by domestic and municipal waterworks and street lighting sectors. The industrial sectors consume 10% of energy. TABLE. I - SECTOR WISE ELECTRICITY CONSUMPTION [9] Sl.No. Sector % share 1 Agriculture 25 2 Commercial 25 3 Domestic 20 4 Municipal waterworks and street lighting 20 5 Industrial 10 J.Booma Et.al.,” RELIABILITY ANALYSIS FOR RESTRICTED AND UN – RESTRICTED DEMAND OF TAMILNADU POWER GRID FOR THE YEAR 2014 USING WASP-IV”, International Journal of Future Innovative Science and Engineering Research (IJFISER) ISSN (Online): 2454- 1966, Volume-2, Issue-2, JUNE - 2016, Page-135 International Journal of Future Innovative Science and Engineering Research (IJFISER), Volume - 2, Issue – II, ISSN (Online): 2454- 1966 www.istpublications.com. Table II shows technologies and the existing installed capacity of the state at the end of the year 2014 and the assumed values of Forced Outage Rate (FOR) and maintenance schedules. FOR values are assumed as per their commencement period, and WECS has highest assumed FOR, because of its intermittent in nature. TABLE II- INSTALLED GENERATION CAPACIY IN TAMIL NADU 2014. Sl. No. Capacity FOR Maintenance Schedule Name of the plant Type of fuel (MW) (%) (Days/yr) ETPS Coal 450 40 50 1 TTPS Coal 1050 33 30 2 MTPS (Stage I&II) Coal 840 33 30 3 MTPS (Stage III) Coal 600 33 30 4 NCTPS (Stage I) Coal 630 33 30 5 NCTPS (Stage II) Coal 1200 33 30 6 Hydro - 2190 - 10 7 TANGEDCO Gas 515 47.6 30 8 Share from Central Lignite 3653 25 25 9 Share from Central Nuclear 524 30 25 10 IPP-I Gas 503 48.5 30 11 IPP-II Diesel 412 48.5 25 12 IPP-III Coal 1150 33 25 13 Biogas and Bio mass - 870 75 30 14 Wind farm - 7206 81.4 30 15 Total 21793 - As on 31.12.2014, out of 21,793MW installed capacities, coal plants share 44%, gas plants share 5%, nuclear plants and diesel plants share 2% each and therefore total thermal contribution was 53% and renewable powers contribution was 47% (Wind 33%, Biomass 4% and Hydro 10%).
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