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The anatomy of a blackout

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By Dr Tilak Siyambalapitiya

It is too early to come to conclusions on what caused the first event towards the blackout on Tuesday afternoon, why that event propagated all over the grid causing a national blackout, and why it took so long to restore electricity supply. The blackout set in around 1235; it was about 2230 when the last customer was reconnected. There is no official statement on whether the problem has been resolved, whether there were equipment damages and whether any such damages have imposed constraints to operate the grid in its normal state.

In the recent past, blackouts have occurred on 9th October 2009, 27th September 2015, 25th February 2016 and 13th March 2016. The blackout earlier this week on 17th August was the 5th blackout in recent memory.

Electric power systems are designed to receive electrical energy from power plants and deliver to customers. Unlike any other commodity, electricity cannot be stored in the form of electricity. It can be stored as water (in a reservoir), fuel (coal, oil or gas) and as chemical energy (in a battery). Wind and solar power generation have no storage whatsoever. Producing electricity from water, fuel or batteries has to be done at the same instant the customer requests the electricity supply to his light, air conditioner, water pump or the factory machine. Therefore, the key word is “dynamic equilibrium”.

That means the rate of electricity production at any moment (measured in megawatt) should be equal to the total customer demand plus the losses in the power transmission and distribution network. As long as there is a balance, all customers will get electricity supply, at the correct voltage and frequency.

Customer demand for electricity is not static. It varies all the time, based on time of day, weather, tea breaks and lunch breaks, and even as a result of TV programmes. Power system controllers also watch TV, particularly when extremely popular programmes and cricket matches are aired to raise power plant output when the match begins, be watchful during breaks, and reduce power generation when the match is over. Remember the production and the demand have to be the same all the time.

Then there are other causes. Sudden rain in a hydropower area would compel such power plants to be immediately brought into operation to save water from spilling over the reservoir. Fast moving clouds over a solar power generating area would cause electricity production from solar power to fluctuate. Electricity production from wind power plants fluctuate all the time, severely at times. These fluctuations of electricity production are somewhat predictable and can be managed, provided the amount of fluctuating hydro, solar and wind power are not very large portions of the supply. Remember the production and demand have to be the same all the time.

When any external event or an equipment failure causes that equilibrium to be lost, then we say the electricity system enters a transient state. The first reaction of the protection equipment would be to isolate the affected section of the network. Just like the fuse, the circuit breaker or the trip switch would isolate a section or all of your house, similar equipment would immediately detect the problem and isolate that faulty section. Electricity travels very fast, at the speed of light. So this isolation too, has to be done very fast, for two reasons: the faulty equipment has to be saved from damage and the fault should be prevented from causing secondary ones.

If the faulty section caused the loss of a power plant, or caused a sizeable share of customers to be disconnected, the matter will be serious, because now we have lost the balance between electricity production and demand. There would be either a shortage or a surplus of electricity production. In most situations, it is a shortage of electricity production because most problems occur within power plants or in the immediately vicinity of power plants. So, now we have less production, and it is not possible to meet the customer demand.

This is when the stored energy in the power system, in the form of rotating generators as well as rotating equipment owned by customers come to help. Any rotating mass has a stored energy. In the technical jargon (this is taught at A-levels too), the energy stored is the rotational kinetic energy. This stored energy is in the form of mechanical energy and is proportional to the size of the generator and to the square of the rotating speed. Large, fast-rotating generators (such as Norochcholai, Kerawalapititya and Kelanitissa) have larger stored energy. Large but slow rotating generators such as hydropower, have moderate stored energy. Small, slow rotating generators such as small hydro and wind power have a small amount of stored energy. Reciprocating engine-generators such as Sapugaskanda and Embilipitiya have very small stored energy. Finally, solar power has zero stored energy.

After the initial fault, such as a short circuit, the affected section is isolated by switches operating automatically and if that causes a power plant to be lost, then the remaining generators would immediately slowdown. Remember that the stored energy is proportional to the square of the speed? So when slowing down, they ‘release’ their stored energy, and convert that to electrical energy, to serve customers. This happens automatically; no operator intervention is required.

Remember these events happen all in a few seconds. Fault isolation may take about 0.1 seconds. Slowing down of generators will happen immediately and may go one for about 2 to 5 seconds. Now, slowing down of generators cannot be done all the time because they would then come to standstill and would not produce any electricity. In fact, this slowing down is allowed by about 5% of the rated speed. As the generators slow down, just like the heartbeat, the ‘frequency’ of the power supply also decreases. If the frequency, which is normally 50 cycles per second, reduces to 49 cycles per second, and stabilizes, then there will be no problem. The frequency stabilizes and then within 5 to 10 seconds, water or fuel valves of power plants will open and admit more energy into generators, which will raise the production of electricity. Then the frequency will also increase and again stabilizes at 50 cycles per second. All these happen automatically; no physical intervention is required, provided there are generators already connected to the grid, producing electricity, with spare capacity, and ‘fuel’ in store.

Sri Lanka’s power system is running with very little spare capacity, thanks to the two politicians who cancelled all the major power plants that were on the drawing boards in 2015. Politicians in Sri Lanka take pride in cancelling projects, but not for facilitating their construction. Then over 2016-2020, the country was compelled to run the existing oil power plants and purchase new oil power plants (much to the delight of some others), then the production costs went up. However, electricity prices cannot be increased because the same two politicians would not allow. So, most of the time, there is no extra fuel in the tanks to quickly raise the electricity production. In other words, spare capacity is not used, even if it is available, because keeping them spinning on partial production levels, hoping some emergency may occur, is costly. Such spare capacity, in the jargon, is known as ‘spinning reserve’.

So how does a grid go dead?

Assuming the short circuit is relieved, then if a power plant has shutdown, the ‘frequency’ drops, attempting to balance the supply and demand. What if it is unable to balance; if the gap between supply and demand is too high and if the frequency cross 49 cycles per second and goes down further? Then the second layer of protection comes into action, automatically. Customers are automatically removed from the grid in blocks, thus reducing the demand for electricity. This happens in several stages, automatically. If the gap between supply and demand is too large, up to 50% of customers may be automatically removed, in a desperate attempt to restore the balance. In most case this works, but for reasons yet to be investigated, it did not happen in this Tuesday’s blackout.

If the supply and demand cannot be balanced even after removing 50% of customers, the there is no hope. A blackout is inevitable. The ‘frequency’ may hit 47 cycles per second and then larger generators (Norochcholai, Kelanitissa) would trip automatically, for their own safety. Hydropower may hold on for a bit longer, but would not be allowed to reach even 46 cycles. One by one, all generations in the grid would shut down, automatically, for their own safety.

All this happens, typically within five seconds. For how long the grid struggled on Tuesday afternoon this week to recover is still unknown. In the 2009 blackout, it was all over in just over 3 seconds (yes seconds, not minutes).

In the 2015 blackout, the grid struggled for 3 ½ minutes before its collapse. In 2016 February blackout, the gird struggled for 8 minutes, before the final collapse.

 



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Sheer rise of Realpolitik making the world see the brink

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A combined US-Israel attack on Iran.(BBC)

The recent humanly costly torpedoing of an Iranian naval vessel in Sri Lanka’s Exclusive Economic Zone by a US submarine has raised a number of issues of great importance to international political discourse and law that call for elucidation. It is best that enlightened commentary is brought to bear in such discussions because at present misleading and uninformed speculation on questions arising from the incident are being aired by particularly jingoistic politicians of Sri Lanka’s South which could prove deleterious.

As matters stand, there seems to be no credible evidence that the Indian state was aware of the impending torpedoing of the Iranian vessel but these acerbic-tongued politicians of Sri Lanka’s South would have the local public believe that the tragedy was triggered with India’s connivance. Likewise, India is accused of ‘embroiling’ Sri Lanka in the incident on account of seemingly having prior knowledge of it and not warning Sri Lanka about the impending disaster.

It is plain that a process is once again afoot to raise anti-India hysteria in Sri Lanka. An obligation is cast on the Sri Lankan government to ensure that incendiary speculation of the above kind is defeated and India-Sri Lanka relations are prevented from being in any way harmed. Proactive measures are needed by the Sri Lankan government and well meaning quarters to ensure that public discourse in such matters have a factual and rational basis. ‘Knowledge gaps’ could prove hazardous.

Meanwhile, there could be no doubt that Sri Lanka’s sovereignty was violated by the US because the sinking of the Iranian vessel took place in Sri Lanka’s Exclusive Economic Zone. While there is no international decrying of the incident, and this is to be regretted, Sri Lanka’s helplessness and small player status would enable the US to ‘get away with it’.

Could anything be done by the international community to hold the US to account over the act of lawlessness in question? None is the answer at present. This is because in the current ‘Global Disorder’ major powers could commit the gravest international irregularities with impunity. As the threadbare cliché declares, ‘Might is Right’….. or so it seems.

Unfortunately, the UN could only merely verbally denounce any violations of International Law by the world’s foremost powers. It cannot use countervailing force against violators of the law, for example, on account of the divided nature of the UN Security Council, whose permanent members have shown incapability of seeing eye-to-eye on grave matters relating to International Law and order over the decades.

The foregoing considerations could force the conclusion on uncritical sections that Political Realism or Realpolitik has won out in the end. A basic premise of the school of thought known as Political Realism is that power or force wielded by states and international actors determine the shape, direction and substance of international relations. This school stands in marked contrast to political idealists who essentially proclaim that moral norms and values determine the nature of local and international politics.

While, British political scientist Thomas Hobbes, for instance, was a proponent of Political Realism, political idealism has its roots in the teachings of Socrates, Plato and latterly Friedrich Hegel of Germany, to name just few such notables.

On the face of it, therefore, there is no getting way from the conclusion that coercive force is the deciding factor in international politics. If this were not so, US President Donald Trump in collaboration with Israeli Rightist Premier Benjamin Natanyahu could not have wielded the ‘big stick’, so to speak, on Iran, killed its Supreme Head of State, terrorized the Iranian public and gone ‘scot-free’. That is, currently, the US’ impunity seems to be limitless.

Moreover, the evidence is that the Western bloc is reuniting in the face of Iran’s threats to stymie the flow of oil from West Asia to the rest of the world. The recent G7 summit witnessed a coming together of the foremost powers of the global North to ensure that the West does not suffer grave negative consequences from any future blocking of western oil supplies.

Meanwhile, Israel is having a ‘free run’ of the Middle East, so to speak, picking out perceived adversarial powers, such as Lebanon, and militarily neutralizing them; once again with impunity. On the other hand, Iran has been bringing under assault, with no questions asked, Gulf states that are seen as allying with the US and Israel. West Asia is facing a compounded crisis and International Law seems to be helplessly silent.

Wittingly or unwittingly, matters at the heart of International Law and peace are being obfuscated by some pro-Trump administration commentators meanwhile. For example, retired US Navy Captain Brent Sadler has cited Article 51 of the UN Charter, which provides for the right to self or collective self-defence of UN member states in the face of armed attacks, as justifying the US sinking of the Iranian vessel (See page 2 of The Island of March 10, 2026). But the Article makes it clear that such measures could be resorted to by UN members only ‘ if an armed attack occurs’ against them and under no other circumstances. But no such thing happened in the incident in question and the US acted under a sheer threat perception.

Clearly, the US has violated the Article through its action and has once again demonstrated its tendency to arbitrarily use military might. The general drift of Sadler’s thinking is that in the face of pressing national priorities, obligations of a state under International Law could be side-stepped. This is a sure recipe for international anarchy because in such a policy environment states could pursue their national interests, irrespective of their merits, disregarding in the process their obligations towards the international community.

Moreover, Article 51 repeatedly reiterates the authority of the UN Security Council and the obligation of those states that act in self-defence to report to the Council and be guided by it. Sadler, therefore, could be said to have cited the Article very selectively, whereas, right along member states’ commitments to the UNSC are stressed.

However, it is beyond doubt that international anarchy has strengthened its grip over the world. While the US set destabilizing precedents after the crumbling of the Cold War that paved the way for the current anarchic situation, Russia further aggravated these degenerative trends through its invasion of Ukraine. Stepping back from anarchy has thus emerged as the prime challenge for the world community.

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A Tribute to Professor H. L. Seneviratne – Part II

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A Living Legend of the Peradeniya Tradition:

(First part of this article appeared yesterday)

H.L. Seneviratne’s tenure at the University of Virginia was marked not only by his ethnographic rigour but also by his profound dedication to the preservation and study of South Asian film culture. Recognising that cinema is often the most vital expression of a society’s aspirations and anxieties, he played a central role in curating what is now one of the most significant Indian film collections in the United States. His approach to curation was never merely archival; it was informed by his anthropological work, treating films as primary texts for understanding the ideological shifts within the subcontinent

The collection he helped build at the UVA Library, particularly within the Clemons Library holdings, serves as a comprehensive survey of the Indian ‘Parallel Cinema’ movement and the works of legendary auteurs. This includes the filmographies of directors such as Satyajit Ray, whose nuanced portrayals of the Indian middle class and rural poverty provided a cinematic counterpart to H.L. Seneviratne’s own academic interests in social change. By prioritising the works of figures such as Mrinal Sen and Ritwik Ghatak, H.L. Seneviratne ensured that students and scholars had access to films that wrestled with the complex legacies of colonialism, partition, and the struggle for national identity.

These films represent the ‘Parallel Cinema’ movement of West Bengal rather than the commercial Hindi industry of Mumbai. H.L. Seneviratne’s focus initially cantered on those world-renowned Bengali masters; it eventually broadened to encompass the distinct cinematic languages of the South. These films refer to the specific masterpieces from the Malayalam and Tamil regions—such as the meditative realism of Adoor Gopalakrishnan or the stylistic innovations of Mani Ratnam—which are culturally and linguistically distinct from the Bengali works. Essentially, H.L. Seneviratne is moving from the specific (Bengal) to the panoramic, ensuring that the curatorial work of H.L. Seneviratne was not just a ‘Greatest Hits of Kolkata’ but a truly national representation of Indian artistry. These films were selected for their ability to articulate internal critiques of Indian society, often focusing on issues of caste, gender, and the impact of modernisation on traditional life. Through this collection, H.L. Seneviratne positioned cinema as a tool for exposing the social dynamics that often remain hidden in traditional historical records, much like the hidden political rituals he uncovered in his early research.

Beyond the films themselves, H.L. Seneviratne integrated these visual resources into his curriculum, fostering a generation of scholars who understood the power of the image in South Asian politics. He frequently used these screenings to illustrate the conflation of past and present, showing how modern cinema often reworks ancient myths to serve contemporary political agendas. His legacy at the University of Virginia therefore encompasses both a rigorous body of writing that deconstructed the work of the kings and a vivid archive of films that continues to document the work of culture in a rapidly changing world.

In his lectures on Sri Lankan cinema, H.L. Seneviratne has frequently championed Lester James Peries as the ‘father of authentic Sinhala cinema.’ He views Peries’s 1956 film Rekava (Line of Destiny) as a watershed moment that liberated the local industry from the formulaic influence of South Indian commercial films. For H.L. Seneviratne, Peries was not just a filmmaker but an ethnographer of the screen. He often points to Peries’s ability to capture the subtle rhythms of rural life and the decline of the feudal elite, most notably in his masterpiece Gamperaliya, as a visual parallel to his own research into the transformation of traditional authority. H.L. Seneviratne argues that Peries provided a realistic way of seeing for the nation, one that eschewed nationalist caricature in favour of complex human emotion.

However, H.L. Seneviratne’s praise for Peries is often tempered by a critique of the broader visual nationalism that followed. He has expressed concern that later filmmakers sometimes misappropriated Peries’s indigenous style to promote a narrow, majoritarian view of history. In his view, while Peries opened the door to an authentic Sri Lankan identity, the state and subsequent commercial interests often used that same door to usher in a simplified, heroic past. This critique aligns with his broader academic stance against the rationalization of culture for political ends.

Constitutional Governance:

H.L. Seneviratne’s support for independent commissions is best described as a hopeful pragmatism; he views them as essential, albeit fragile, instruments for diffusing the hyper-concentration of executive power. Writing to Colombo Page and several news tabloids, H.L. Seneviratne addresses the democratic deficit by creating a structural buffer between partisan interests and public institutions, theoretically ensuring that the judiciary, police, and civil service operate on merit rather than political whim. However, he remains deeply aware that these commissions are not a panacea and are indeed inherently susceptible to the ‘politics of patronage.’

In cultures where power is traditionally exercised through personal loyalties, there is a constant risk that these bodies will be subverted through the appointment of hidden partisans or rendered toothless through administrative sabotage. Thus, while H.L. Seneviratne advocates for them as a means to transition a state from a patron-client culture to a rule-of-law framework, his anthropological lens suggests that the success of such commissions depends less on the law itself and more on the sustained pressure of civil society to keep them honest.

Whether discussing the nuances of a film’s narrative or the complexities of a constitutional clause, H.L. Seneviratne’s approach remains consistent in its focus on the spirit behind the institution. He maintains that a healthy democracy requires more than just the right laws or the right symbols; it requires a citizenry and a clergy capable of critical self-reflection. His career at the University of Virginia and his continued engagement with Sri Lankan public life stand as a testament to the idea that the intellectual’s work is never truly finished until the work of the people is fully realized.

In the context of H.L. Seneviratne’s philosophy, as discussed in his work of the kings ‘the work of the people’ is far more than a populist catchphrase; it represents the practical application of critical consciousness within a democracy. Rather than defining ‘work’ as labour or voting, H.L. Seneviratne views it as the transition of a population from passive subjects to an active, self-reflective citizenry. This means that a democracy is only truly ‘realized’ when the public possesses the intellectual autonomy to look beyond the ‘right laws’ or ‘right symbols’ and instead engage with the underlying spirit of their institutions. For H.L. Seneviratne, this work is specifically tied to the ability of the people—including influential groups like the clergy—to perform rigorous self-critique, ensuring that they are not merely following tradition or authority, but are actively sustaining the ethical health of the nation. It is a perpetual process of civic education and moral vigilance that moves a society from the ‘paper’ democracy of a constitution to a lived reality of accountability and insight.

This decline of the ‘intellectual monk’ had a catastrophic impact on the political landscape, particularly surrounding the watershed moment of 1956 and the ‘Sinhala Only’ movement. H.L. Seneviratne posits that when the Sangha exchanged their role as impartial moral advisors for that of political kingmakers, they became the primary obstacle to ethnic reconciliation. He suggests that politicians, fearing the immense grassroots influence of the monks, entered a state of monachophobia, where they felt unable to propose pluralistic or fair policies toward minority communities for fear of being branded as traitors to the faith. In H.L. Seneviratne’s framework, the monk’s transition from a social servant to a political vanguard effectively trapped the state in a cycle of majoritarian nationalism from which it has yet to escape.

H.L. Seneviratne’s work serves as a multifaceted critique of the modern Sri Lankan state and its cultural foundations. Whether he is dissecting what he sees as the betrayal of the monastic ideal or celebrating the humanistic vision of an Indian filmmaker, his goal remains the same: to champion a world where intellect and compassion are not sacrificed on the altar of political power. His legacy at the University of Virginia and his continued voice in Sri Lankan discourse remind us that the work of the intellectual is to provide a moral compass even, indeed especially, when the nation has lost its way.

(Concluded)

by Professor
M. W. Amarasiri de Silva

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Musical journey of Nilanka Anjalee …

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Nilanka Anjalee Wickramasinghe is, in fact, a reputed doctor, but the plus factor is that she has an awesome singing voice, as well., which stands as a reminder that music and intellect can harmonise beautifully.

Well, our spotlight today is on ‘Nilanka – the Singer,’ and not ‘Nilanka – the Singing Doctor!’

Nilanka’s journey in music began at an early age, nurtured by an ear finely tuned to nuance and a heart that sought expression beyond words.

Under the tutelage of her singing teachers, she went on to achieve the A.T.C.L. Diploma in Piano and the L.T.C.L. Diploma in Vocals from Trinity College, London – qualifications recognised internationally for their rigor and artistry.

These achievements formally certified her as a teacher and performer in both opera singing and piano music, while her Performer’s Certificate for singing attested to her flair on stage.

Nilanka believes that music must move the listener, not merely impress them, emphasising that “technique is a language, but emotion is the message,” and that conviction shines through in her stage presence –serene yet powerful, intimate yet commanding.

Her YouTube channel, Facebook and Instagram pages, “Nilanka Anjalee,” have become a window into her evolving artistry.

Here, audiences find not only her elegant renditions of local and international pieces but also her original songs, which reveal a reflective and modern voice with a timeless sensibility.

Each performance – whether a haunting ballad or a jubilant interpretation of a traditional hymn – carries her signature blend of technical finesse and emotional depth.

Beyond the concert hall and digital stage, Nilanka’s music is driven by a deep commitment to meaning.

Her work often reflects her belief in empathy, inner balance, and the beauty of simplicity—values that give her performances their quiet strength.

She says she continues to collaborate with musicians across genres, composing and performing pieces that reflect both her classical discipline and her contemporary outlook.

Widely acclaimed for her ability to adapt to both formal and modern stages, with equal grace, and with her growing repertoire, Nilanka has become a sought-after soloist at concerts and special events,

For those who seek to experience her artistry, firsthand, Nilanka Anjalee says she can be contacted for live performances and collaborations through her official channels.

Her voice – refined, resonant, and resolutely her own – reminds us that music, at its core, is not about perfection, but truth.

Dr. Nilanka Anjalee Wickramasinghe also indicated that her newest single, an original, titled ‘Koloba Ahasa Yata,’ with lyrics, melody and singing all done by her, is scheduled for release this month (March)

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