Author Archives: olivianelson076

The History of the Electricity Generation Sector


The electrical generating sector came into being in the last two decades of the 19th century in the industrial countries, with the first small installations of public capacity in the 1890s in the USA, UK and Japan, mainly for street lighting. In those early years and in years before manufactured town gas was a more important energy source in the cities. Electric power grew slowly during the first half of the 20th century, supplied by a myriad of small local companies mostly operating in towns. The Second World War was to change this and with the explosion of industrial activity that it unleashed, electricity became a major national priority. Many countries nationalised their electricity industries or grouped them into large consolidated utilities. Until then electricity had been generated and distributed locally but now transmission entered the picture. Transmission lines were constructed to transport bulk power at high voltages over long distances from large centralised generating facilities to industrial and population load centres where it was distributed at low voltage.

Global generating capacity rose from approximately 134 GW in 1938, to 213 GW in 1950 after the Second World War, and then to 5,082 GW in 2010. Although the figures were small compared with today, the years of WW 2 and the following period, from 1938 to 1950 were a time of enormous change in the electrical sector in which the seeds of today’s industry were sown. There was heavy destruction to the industry in Europe and Japan in the first half of the 1940s, while in the USA capacity grew from 37.6 GW in 1938 to 50.1 GW in 1945. In the years after the war reconstruction commenced, with global capacity growing to 217 GW by 1950.

Hydropower Impacts


An environmental disaster occurred with the Idukki hydroelectric project in the Western Ghats of the Indian Peninsula at an altitude of 695 metres above sea level. The reservoir is formed by three dams, an arch dam across the Periyar River, a concrete dam across the Cheruthony River and a masonry dam at Kulamavu, upstream of Idukki. The reservoir covers nearly 60 sq km and has a catchment of 649 square km. Water from the reservoir is channelled down to the underground power house at Moolamattom through an underground tunnel, yielding an average gross head of 2,182 feet (665 metres). The project has an installed capacity of 780 MW with firm power potential of 230 MW at 100% load factor.

The project involved diversion of the waters of the upper part of the Periyar River into the Muvattupuzha River. This caused severe drought in areas down stream of the river in summer and reduced fresh water availability for industries located near the mouth of the river. The fresh water regime of Periyar River was in dynamic equilibrium with the estuarine tidal cycle. The impoundment of the dam and diversion of water upset this equilibrium and this led to saline water intrusion into areas where fresh water was available previously.

After impoundment of the dam, hundreds of tremors had been recorded in the Idukki area and most of them are classified as reservoir induced. So far, these tremors have not caused any serious damage. Valley slumpings and slope failures became more common in the area following construction of the dam. A major reason for this was the destruction of the forests during and after the construction. The project opened up the inner forests of Idukki district. This accelerated migration to the area, with the work force of around 6,000 itself acting as the nucleus.

The project submerged about 6,475 hectares of evergreen and deciduous tropical forests and the construction of roads, felling of trees and other encroachments led to loss of about 2,700 hectares of forest and hastened degradation of the remaining forests. Much of the degradation of forests that has happened over the years is irreversible. Owing to loss of habitat, some reptilian species like the rare terrapin have become extinct or sparse.

Indicies for measuring changes in energy efficiency



Market basket approach

The market basket approach estimates energy consumption trends for a controlled set of energy services (the market basket) with individual categories of energy services controlled relative to their share in the index. This method of indexing is a type of ‘bottom up’ approach. Limitations: lack of efficiency measures for some services and nature of measures may not be derived in actual use conditions, updated regularly and so on, and consumers may substitute comparable products if prices change’.

Comprehensive approach

The comprehensive approach attempts to take all energy use into account. It starts the measurement process with the broadest available measures of energy use and demand indicators. Over time, changes in these measures reflect changes in behaviour, structure, energy efficiency and so on. The effects, unrelated to changes in energy efficiency, are then removed. This approach can be thought of as a ‘top down’ approach. It is like peeling away all the effects until energy efficiency is all that remains. Energy consumption is measured as primary energy (the amount of energy delivered to an end user adjusted to account for the energy that is lost in generation, transmission or distribution) or site energy (the amount of energy that is delivered to an end user and not adjusted for primary energy). The demand indicator is a measure of the number of energy consuming units for which energy inputs are required. The main limitations of this approach are that it is difficult to decide which energy services should be included and challenging to separate weather, structure and behavioural changes.

Divisia Index Approach

The Divisia index approach may be used to decompose time trends into different factors such as structural and intensity. The results may measure energy savings over time and uses time trend data.

Historical Wind Energy Developments in India


2009 Developments

In September 2009 a broad feed-in tariff calculation formula was introduced by the Central Electricity Regulatory Commission (CERC), which varies by technology, resource intensity and return on equity. The tariff incorporates small projects and projects that can‘t benefit from the government’s accelerated depreciation programme. Developers can apply for this incentive up to the end of March 2012.

In December 2009, the Ministry of Power also approved a Generation Based Incentive (GBI) subsidy of INR 0.5 per unit of electricity fed into the grid with a cap of USD 33,000 per MW per year for a minimum of four years and a maximum of 10 years.

Eligible projects include those commissioned after 17 December 2009. The scheme is limited to the first 4,000 MW of eligible capacity that is grid connected by March 2012. As of January 2011, only 394 MW of wind capacity was registered with the GBI from independent power producers, with thermal power projects keen to use wind power to meet their mandates for carbon emission reductions. Thus, a review of the GBI is anticipated.

A total of INR 3.8 billion (USD 84.4 million) was earmarked for the scheme in December 2009.

Wind power projects selling to third parties or merchant power plants are excluded under the scheme.

2010 developments

In January 2010, India’s Central Electricity Regulatory Commission announced rules for trading with renewable energy certificates (RECs). These certificates can be bought by companies to meet their renewable energy requirements according to state renewable portfolio standards. There are plans for a national agency to administer the certificates trading. Eligible projects have a minimum capacity of 250 kW and are commissioned after March 2010. They are not allowed to receive feed-in tariffs. Non-solar RECs must trade within the price band of INR 1.5 to 3.9 per kWh (USD 0.033 to 0.087 per kWh). Thus, there is more of an incentive for developers to opt for the feed-in tariff in Haryana state if the projects are eligible, as the feed-in tariff is above INR 3.9 per kWh.

The government introduced an INR 50 tax on every tonne of coal produced or imported into India, with money raised being used for a new Clean Energy Fund.

Also in 2010, the MNRE announced an intention to leverage INR 25 billion (USD 500 million) from the Clean Energy Fund to establish a Green Bank, working with IREDA.

Historical Data Series: Indian Water resources



India has 20 river basins, both major and minor. The largest of these, in terms of area, is that of India’s largest and longest river, the Ganges (known in India as the Ganga) and its major tributary the Yamuna. The Ganges flows southeast along the foothills of the Himalaya mountain range until it enters Bangladesh and then turns southward to empty into the Bay of Bengal.

Other major Indian rivers include the Narmada (India’s largest westward-flowing river), which flows through central India into the Arabian Sea, and three eastward-flowing rivers, the Godavari, the Krishna, and the Cauvery, which flow through southern India into the Bay of Bengal. Besides these, there are two other major rivers which pass through India: The Indus, which rises in Tibet and flows northwest through the Northern state of Jammu and Kashmir before entering Pakistan, and the Brahmaputra, which also rises in Tibet and flows southwest through the eastern Indian states of Arunachal Pradesh and Assam before entering Bangladesh and joining the Ganges.

There are many players in India’s hydroelectric sub-sector. Twenty-two different ownership entities are involved in the hydroelectric facilities that are of at least 100 MW in capacity. The most important hydroelectric generator, though currently not the largest in terms of generating capacity, is the National Hydroelectric Power Corp. (NHPC), which was created in 1975 with the mandate to develop India’s hydropower potential. NHPC presently owns and operates nine hydropower facilities, ranging from the 1,000 MW Indira Sagar Project to the 5 MW Kalpong Power Plant in the Andaman & Nicobar Islands. Its total generating capacity is 5,295 MW from 14 hydro plants, with 3,145 MW coming online since 1996 due to the commissioning of the 1,000 MW Indira Sagar and 520 MW Omkareshwar plants. In August 2009 the NHPC successfully launched an initial public offering and became a listed company one month later.

The Bhakra Beas Management Board (BBMB) is currently one of India’s largest hydropower generators. It was created in 1966 to manage the supply of water, in Himachal Pradesh state, from the Sutlej and Ravi-Beas rivers whose waters flow into Punjab, Haryana, Rajasthan, and Delhi. BBMB presently operates five hydroelectric facilities, with a total generating capacity of 2,866 MW, including the two power plants at Bhakra Dam whose combined capacity is 1,325 MW.

Developing Water Markets

For years, water has been a heavily subsidised commodity. In the United States, for instance, farmers in desert regions of California have received water at unrealistically low prices for decades. A small number of these farmers, in fact, have controlled as much as 80% of the state’s water supply. This pattern of subsidised water use has been repeated in countries worldwide, for different groups within the population. A new economic scheme for water is becoming prevalent in many countries, as for the first time, governments and people are realising that water itself is a commodity with a real market value.

Water has been traditionally viewed as an inexhaustible resource that should be available to everyone at little or no charge. However, this view is changing with demand outstripping supply wherever it is treated as a “free” good. A recent study by Johns Hopkins University predicts that, under current water management, 35% of the world’s population will run short of water in the next 25 years. With the impending water shortages countries are looking for new and innovative ways to manage this valuable resource. Most experts agree that the opportunities for expanding traditional water sources such as groundwater and reservoir storage is limited due to rising environmental and economic costs. For example, in some parts of the world, the cost of tapping new groundwater supplies has tripled as a result of aquifers being drawn down. The draw down is also causing pollution problems, further driving up the cost of treating water. With limited supplies of fresh water, some users are turning to desalinisation to meet the rising demands. Even with recent technological advances, desalinisation still comes with a hefty price tag.

With the high cost of development limiting expansion of water supply, the growing demand for water will be kept in check by higher prices and supplies to meet the demand will have to come from reallocating water from current uses. Neither of these has occurred because prices and allocation have been determined in the political arena. In that setting, powerful interest groups have prevented any meaningful increases in water prices or reallocations.

A look back to 2010 Government Support for Wind Energy in the UK


The government wants their extensive plans paid for by private investment (currently estimated at GBP 100 billion +), incentivised by an extension of the Renewables Obligation subsidy mechanism until 2037. Under the Utilities Act 2000 the government has the power to issue a Renewable Obligation Order requiring electricity suppliers to supply a certain proportion of their energy from renewable sources. To prove they have got their energy from renewable sources they have to buy Renewable Obligation Certificates (ROCs), which are issued to generators of renewable energy, alongside any renewable energy they source. The ROCs represent approximately GBP 35 per MWh (actual price March 2009: GBP 35.76), so a wind farm operator can sells its MWh for around BP 65 with the accompanying ROC compared with a coal fired power station selling its MWh at around GBP 30 – a significant incentive. Industry watchdog Ofgem determines the value of ROCs on an annual basis.

In 2009 onshore wind accounted for 33% of the total number of ROCs issues and offshore wind only 8%. To boost the offshore industry, the government allowed multiple ROCs per MWh for offshore projects reaching financial close in the 2009/10 and 2010/11 financial years.

In Scotland, a similar system runs, called the Renewables (Scotland) Obligation

The 2010 Finance Bill upholds the value of offshore electricity at one ROCs (Renewable Obligation Certificates) per megawatt-hour for accredited onshore wind farms and two ROCs for offshore wind farms until 2014. For the 2010/2011 financial year the buyout price for ROCs was GBP 36.00. The government also awarded GBP 50 million of financial aid to offshore wind turbine manufacturing and equipment testing plants.

It is estimated that suppliers in the Scotland, England and Wales will need 0.124 ROCs per MWh to meet their renewable obligations and 0.055 ROCs per MWh in Northern Ireland.

Starting in April 2010 feed-in tariffs were available for households and local authorities that want to produce their own renewable energy electricity. The tariffs range from 34.5 pence per kWh for capacities below 1.5 kW to 4.5 pence per kWh for capacities between 1.5 and 5 MW for twenty years and will keep pace with installation. It is estimated that 2% of the UK’s electricity demand will be met by small scale renewables by 2020 and will be eligible for these feed-in tariffs.