RENWEABLE ENERGY RESOURCES AND DISTRIBUTED GENERATION IN INDIA JITENDRA SINGH BHADORIYA1 AASHISH KUMAR BOHRE2 GANGA AGNIHOTRI3 GEETA AGNIHOTRI4 2 School of Instrumentation Devi Ahilya University ,Indore ,INDIA. 2& 3 Department of Electrical Engineering, Maulana Azad National Institute of Technology, Bhopal, INDIA. 4 Department of Mechanical Engineering Maulana Azad National Institute of Technology, Bhopal, INDIA.ABSTRACT- Distributed Generation playing a important I. INTRODUCTIONrole in the electricity paradigm of the world. In India also As the INDIA addresses the challenges of achieving energyDG in form of renewable energy resources contributing to sustainability in the 21st century, the recognition of the needthe Indian power sector. In this paper we have discussed to find alternatives to current practices has been stymied bythe scenario for distributed generation with progress and the identification of many complexities: including matchingachievement so far in India. We have focused on the supply and demand, the scale of current and projected needs,renewable energy resources because of its advantage and and the difficulty of replacing the present unidirectionalpollution free electricity towards making Indian power system with far more complex hybrid systems utilizingsector neat and clean (green country).With the use of disparate sources and supplies of energy. One of the majorDistributed Generation either grid connected or in off challenges is designing new systems that leverage existingmode there are some issues that should be resolved for infrastructure based on centralized generation to takemaking Distributed Generation system more efficient and advantage of alternative sources at a local level. Thereliable. examination of past energy technology practices at historic sites can provide us with some lessons for new system designsKEYWORDS- Distributed Generation (DG), ministry of that integrate centralized generation with local resources, andrenewable energy resources (MNES), Distributed Energy match distributed demand with local supply. The objective ofResources (DER). energy sustainability can be approached today in the way it
was in the past: as a site specific problem of achieving new technologies especially power electronics andminimal or zero net demand. By applying modern technology measurement data computing associated with smart gridand ecological knowledge, we can utilize local resources in a allows using better and conscious these distributed sources;way that causes little or no environmental damage. In recent smart grid approach may take advantage of specifictime, local onsite power production was gradually abandoned characteristic of distributed sources for ensuring more reliablein favor of ever larger and more centralized energy quality of supply. With the help of local generation orproduction. These massive centralized systems have become distributed generation we will be able to make a decentralizedmore and more difficult and expensive to manage effectively system, more reliable, secure and pollution free energyand sustainably. After first exploiting many hydropower system.resources through dams and impoundments in the early part ofthe century, and depleting most domestic supplies of II. DISTRIBUTED GENERATION ANDpetroleum INDIA became increasingly dependent on foreign SUSTAINABILITYsupplies of fossil fuels to power our industries. As long as According to the Ministry of New and Renewable Energy,these resources were cheap and plentiful, it made sense to shift Govt. of India at the time of independence in the year 1947our means of production away from local resources. But now only 1362 MW of electricity was produced in India. India paidwe are faced with the dilemma of declining production and considerable attention to the generation of power as a result of which the installed capacity of power generation till 2010 hasSupplies which are slated to become ever more scarce and grown to 164,509 MW of which Hydro is 37086 MW (25%),expensive. It is time for us to reacquaint ourselves with Local Thermal is 106,433MW (65%), Nuclear is 4560MW (2.9%)energy production, and educate ourselves about reducing our and Renewable energy sources 16429MW (7.7%) The sharedemand for offsite energy by meeting as much Of the need as of small scale hydropower (SHP) is 2,820 MW. Thepossible using onsite energy sources. The great benefit of total Installed capacity of power utilities in the countryrediscovering these local energy resources is the potential to increased from 14,709 MW in 1970-71 to 173,626 MW as oncreate facilities that meet all or a large part of their own 31.3.11, with a CAGR of 6.2 % over the period. The highestenergy needs without requiring long distance energy CAGR (7.1%) was in case of Thermal utilities followed bytransmission. Local energy production reduces waste by Nuclear (6.1%) and Hydro (4.4%).The electricity sector inlessening dependence on the infrastructure of large power India had an installed capacity of 211.766 GW as of Januaryplants and distribution systems which are notoriously 2013, the worlds fifth largest. Captive power plants generateinefficient. Installation of a large number of small sources an additional 31.5 GW. Non Renewable Power Plantscalled distributed generation creates many problems in proper constitute 88.55% of the installed capacity and 11.45% ofcontrol of national (and India) power grid. At the same time
Renewable Capacity. The International Energy of the government liquid fuel policy gas engines are likely toAgency estimates India will add between 600 GW to 1200 be the preferred option for DG. Gas engines are costGW of additional new power generation capacity before competitive in view of the relatively low natural gas price.2050. The technologies and fuel sources India adopts, as it These are likely to be the preferred option for DG in areasadds this electricity generation capacity, may make significant where natural gas is available. The existing engineimpact to global resource usage and environmental issues. manufacturers need to promote their gas engines in India.Since INDIA is making good progress from the generation India has planned for DG meeting 10% of India’s power inpoint of view, but the percentage of renewable sources is not future by 2015. For meeting this demand we need to take acontributing with same rate. As of December 2011, India had glance on the renewable energy resource distributedan installed capacity of about 22.4 GW of renewal generation.technologies-based electricity, about 12% of its total. Indiahad add 3.6 GW of renewal energy installed capacity by (A) SOLAR POWERDecember 2012 By making use of DG we have to focus on the India is densely populated and has high solar insulations, angreen electricity at a greater extent because India plans to add ideal combination for using solar power in India. In the solarabout 30 GW of installed electricity generation capacity based energy sector, some large projects have been proposed, and aon renewal energy technologies, by 2017. Like in other 35,000 km2 area of the Thar Desert has been set aside for solardeveloping countries, there is also a wide gap between power projects, sufficient to generate 700 GW to 2,100 GW.demand and supply in India . So there is also considerable Also Indias Ministry of New and Renewable Energy hasenvironmental and resource degradation because of a higher released the JNNSM Phase 2 Draft Policy, by which thedependence on fossil fuels. Government aims to install 10GW of Solar Power and of thisThe non-renewable options considered are internal 10 GW target, 4 GW would fall under the central scheme andcombustion engines fuelled by diesel, natural gas and micro the remaining 6 GW under various State specific schemes.turbines and fuel cells fired by natural gas. The renewable In July 2009, India unveiled a US$19 billion plan to producetechnologies considered are wind, solar photovoltaic, biomass 20 GW of solar power by 2020. Under the plan, the use ofgasification and biogases cogeneration. PEM Fuel cells and solar-powered equipment and applications would be mademicro turbines based on natural gas need a few demonstrations compulsory in all government buildings, as well as hospitalsprojects and cost reductions before becoming viable. and hotels. On 18 November 2009, it was reported that IndiaAmong the non-renewable DG options considered, diesel was ready to launch its National Solar Mission under theengines are prevalent in India. This is because of the scarcity National Action Plan on Climate Change, with plans toof capital and low load factors (use as backup power). In view generate 1,000 MW of power by 2013. From August 2011 to
July 2012, India went from 2.5 MW of grid connected photo wind turbines have been installed. This was due to the intialvoltaic to over 1,000 MW. The amount of solar energy incentives based on capital subsidies and tax benefits due toproduced in India in 2007 was less than 1% of the total energy 100% depreciation. Incentives were not linked to generation.demand. The grid-interactive solar power as of Profit making companies set up wind farms to avail of the taxDecember 2010 was merely 10 MW. Government-funded benefits. In many cases due to improper siting, the actualsolar energy in India only accounted for approximately generation and capacity factors were low. There have been6.4 MW-yr of power as of 2005. However, India is ranked policy correlations. This resulted in a slow-down of capacitynumber one in terms of solar energy production per watt additions during 1996–1998 followed by a more sustainableinstalled, with an insulation of 1,700 to 1,900 kilowatt hours wind capacity addition. The initial experience had manyper kilowatt peak (kWh/KWp). 25.1 MW was added in 2010 unviable wind machines being installed in a hurry to avail taxand 468.3 MW in 2011. By July 2012 the installed grid benefits without considering wind sitting issues. Many of theconnected photo voltaic had increased to 1040.67 MW,[ and machines were designed for European wind regimes that areIndia expects to install an additional 10,000 MW by 2017, and different from the Indian wind regime (more seasonal anda total of 20,000 MW by 2022.DG supply the power either monsoon driven). The MNES has tried to improve thegrid connected or off grid. In India there is more focus in the capacity utilization through technology development andarea of rural electrification because there is good sun season in emphasis on micro-sitting. The MNES has established aIndia so it is better option for local energy resource either grid dedicated research center for wind energy technologyconnected or off grid. The government has also established (CWET). India has a large wind resource assessment effortJawaharlal Nehru National Solar Mission towards with more than 1000 wind monitoring stations. The windthe encouraging solar power in India. energy pro operates commercially and is facilitated by the (B) WIND POWER availability of innovative financing schemes from the IndianIndia is already a leader in wind power generation. As of 31 Renewable Energy Development Agency (IREDA). In orderDec 2012 the installed capacity of wind power in India was to promote wind, the government has provided several18420 MW. Wind power accounts for 6% of Indias total incentives like 100% accelerated depreciation. Many stateinstalled power capacity, and it generates 1.6% of the governments have provided capital subsidies (Andhra Pradesh,countrys power. Most of the installed wind capacity is grid- Maharashtra, Karnataka upto 20%), sales tax exemption. Mostconnected . The wind resources of India have been mapped utilities permit wheeling, banking and buy-back (purchase(data from 1000 monitoring stations throughout the country). price of Rs. 2.25/kWh in 1994–1995 with an escalation of 5%The average cost of generation (at the average load factor of per year).13.3%) is Rs. 5.14/kWh. This implies that several unviable
(C) HYDRO POWER resource in the INDIA. Policies and Programmes for BiomassIndia was the 7th largest producer of hydroelectric power in based Electric Power have been started.2008 after Norway. The potential for hydroelectric The organized thrust on biomass based electric power in Indiapower in India is one of the greatest in the world. India is has a recent origin. The programme took shape after theendowed with economically exploitable and viable hydro MNES appointed the task force in 1993 and recommendedpotential assessed to be about 84,000 MW at 60% load factor thrust on boi-gase based cogeneration . The National. In addition, 6780 MW in terms of installed capacity from Programme on Boi-gase based Co-generation, launched inSmall, Mini, and Micro Hydro schemes have been assessed. 1994, provided for:Also, 56 sites for pumped storage schemes with an aggregate i) the subsidies for specific demonstration projects, ii) supportinstalled capacity of 94,000 MW have been identified. It is the for R&D activities, and iii) support for training, awarenessmost widely used form of renewable energy. India is blessed activities, and publicity. One ground for justifying thewith immense amount of hydro-electric potential and ranks capital subsidy and financial support is that the capital cost of5th in terms of exploitable hydro-potential on global scenario. cogeneration plant is too high, almost equivalent to the cost ofThe present installed capacity is approximately 37,367.4 a new sugar mill. Besides, there is little institutional supportMW which is 21.53% of total Electricity Generation in for getting economic tariffs for the surplus cogeneratedIndia. The public sector has a predominant share of 97% in electricity. The programme was modified in August 1995 andthis sector. National Hydroelectric Power Corporation subsequently in September 1996 to attract sugar mills in the(NHPC), Northeast Electric Power Company (NEEPCO), co-operative and public sector. The important features of theSatluj jal vidyut nigam (SJVNL), Tehri Hydro Development programme are:Corporation, NTPC-Hydro are a few public sector companies 1) Demonstration scheme provides a subsidy up to Rs. 60engaged in development of Hydroelectric Power in India. million per project for 12 projects. The co-operative and public sector units are offered additional benefits of 20 million (D) BIO-FUELS AND WASTE-TO-ENERGY per Mega Watt (MW) of surplus power comprising of PRODUCTION subsidies and soft loans.Major programs in India for power generation from renewable 2) Interest subsidy Scheme which provides grants up to Rs.include wind, biomass (cogeneration and gasifiers), small 3.5 million per MW of surplus power to financial institutionshydro, solar, and energy from wastes. for them to reduce the interest rates on loans.The final step in our tour of distributed energy generation is 3) Support to R&D Projects which contribute to enhancementclosing the loop to examine our most underutilized energy of power potential.
4) Indirect Programmes, like awareness activities such as Megawatt Scale Grid Connected Power Generation: Theseminars and business meets in sugar producing centers recent thrust of the biomass power programme is on the gridfunded and run by MNES, technical support like making connected megawatt scale power generation using variety ofavailable services of international experts and organizing biomass materials such as rice straw, rice husk, biogases,interaction meetings among the stakeholders like state wood waste, wood, wild bushes and paper mill waste. Powergovernments, utilities, financial institutions, manufacturers, generation potential from biomass gasification is estimated atconsultants and project parties. 17000 MW (MNES, 1993a) and another 3500 MW (MNES,5) International support such as i) $ 12.5 million USAID/GEF 1993b) using sugarcane residues. Reputed Indian engineeringproject for promotion of alternative biomass use in co- firm, Bharat Heavy Electricals Limitedgeneration using off-season and ii) an ADB line of credit of $ (BHEL) has carried out extensive trials to determine the100 million. combustion characteristics of variety of biomass materials. Several other boiler manufacturers in India have acquired theProgramme for biomass combustion based power has even experience in designing boilers for biomass applications.more recent origin. It began in late 1994 with as a Pilot Nearly 55 MW of grid connected biomass power capacity isProgramme launched with approval of two 5 MW projects. commissioned and another 90 MW capacity is underInterest subsidy programmes on the lines of that for the boi- construction. Enhanced scale has improved both thegase based co-generation was extended in 1995. The economics and technology of biomass power generation. Theprogramme also initiated a grid connected biomass technology has improved lately to global standards with thegasification R&D-cum Demonstration project of 500 Kilo Indian companies entering into joint ventures with leadingWatt (KW) capacity. A decentralized electricity generation international manufacturers of turbines and electronicprogramme initiated in 1995 provided support for total of 10 governors.to 15 MW of small decentralized projects aimed at energy selfsufficiency in locals with electricity deficient rural locals. It is III. DISTRIBUTED GENERATIONtargeted to set up 500 MW biomass power capacity during the CHALLENGESplan period. Significant allocations are proposed for R&D Type and strength of interaction of small sources fromactivities (Rs. 770 million) and technical assistance and distributed generation depends largely on types of thesepublicity support (Rs. 90 million). It is also proposed to sources. The distributed generation consists of small sourcesestimate the biomass potential in different locations in India to that at present have no connection with power grid. Thus,guide the technology promotion effort. their actually generated power is unknown to grid. Furthermore many of these sources are weather dependent
(e.g. wind or solar) and in any moment can stop their energy distribution systems . DG can be responsible for differentsupply. Besides that, small generators more frequently break PQ problems, like poor voltage quality, unwanted protectiondown because in small sources is not worth to install trips on healthy feeders, and “islanding”. Voltage quality, indeveloped and expensive monitoring system and keep particular, can become a very critical issue in a distributionmaintenance personnel. Additional power variation caused by system with a relatively large DG amount. Onsite powerdistributed sources appears as a real problem. Many of small generation can do a lot of favors for the consumer. Thesources in distributed generation are connected to the network increase of supply reliability and voltage stability are some ofthrough power electronic converters. Since such a converter the technical aspects. But what is more interesting to theconsiderably contribute to the overall cost of investment, they consumer is that the use of on-site distributed energy resourcesusually install simple converters which are not supply friendly (DER) should bring direct economic benefits . Ministry ofand introduce distortions to the network. This problem is often New and Renewable Energy, India however, feels that theremet in small wind power plants. The number wind power exist challenges for Renewable Energy based Distributedplants in India rise rapidly and their power exceed a few times Generation, some of which are universal and some local, like,the highest predictions. Small sources installed all over the Inherent intermittent nature of renewable energycountry considerably affect the power flows in the network, sources leading to relatively lower capacityvoltages regulation and frequency regulation. If the distributed utilization factors Instances of inadequate loadsources appear in large number, their influence is significant. needing to couple rural industrial load.The way the distribution system is operated is changing due to Relatively high capital costs when compared tosignificant penetration of distributed generation (DG).As a conventional power systems which in turn requireresult, islanding operation of distribution systems with DGs is incentives and financial arrangement.becoming a feasible option. Islanding can improve the quality For capacity building, promotion and developmentof supply indices and reliability [21, 22]. Many European of energy.distribution systems are characterized with a high penetration Requirement of servicing companies for localof fixed speed wind turbine generators and small combined program implementation.heat and power plants. They can take advantage of this high Need for adequate mobilization for payment of userDGs penetration and operate in islanding mode, during power charges involving perhaps Non-Governmentoutage, to increase the over- all reliability of the power supply. Organizations and local bodies.However, there are various issues to be resolved. It is known Lack of operation and maintenance servicesthat the increasing penetration of Distributed Generation (DG) providers is an issue that needs attention.implies different technical problems in the operation of
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BIOGRAPHIES— Dr. Ganga Agnihotri,Jitendra Singh Bhadoriya, Dr. Ganga Agnihotri received BE degree in Electrical engineering from MACT, Bhopal (1972), the ME degreeJitendra Singh Bhadoriya was born in Distt. Bhopal , India, (1974) and PhD degree (1989) from University of Roorkee,in 1989. He received BE degree (2011) from UIT- RGPV India. Since 1976 she is with Maulana Azad College ofBhopal in electrical engineering , and at the moment he is an Technology, Bhopal in various positions. Currently she isM-Tech (instrumentation) scholar at SCHOOL OF professor. Her research interest includes Power SystemINSTRUMENTATION, Devi Ahilya University (DAVV) , Analysis, Power System Optimization and Distributionlndore, India. Email: JITENDRIY@INDIA.COM Operation. Email:email@example.comAashish Kumar Bohre,Aashish Kumar Bohre was born in Distt. Hoshangabad,India, in 1984. He received BE degree (2009) from UIT-RGPV Bhopal, and M-Tech degree (Power System) in 2011from MANIT, Bhopal. At the moment he is PhD. scholar atMANIT, Bhopal, India. Email: firstname.lastname@example.org