Huawei Unveils Top 10 Trends of Smart PV for a Greener Future

SHENZHEN, China, Dec. 26, 2022 /PRNewswire/ — Huawei held the Top 10 Trends of Smart PV (photovoltaic) conference, with the theme of ”Accelerating Solar as a Major Energy Source”. At the conference, Chen Guoguang, President of Huawei Smart PV+ESS Business, shared Huawei’s insights on the 10 trends of Smart PV from the perspectives of multi-scenario collaboration, digital transformation, and enhanced safety.

As the proportion of renewable energy keeps increasing, the PV industry acquired a booming growth, yet, the industry still faces many challenges, including how to continue reducing the levelized cost of energy (LCOE), how to improve the O&M efficiency, how to maintain power grid stability as more renewable energy are feeding in, and how to ensure end-to-end system safety.

“Amid the rapid growth of the PV industry, these challenges also bring opportunities.” said Chen Guoguang. As a forward-looking enterprise, Huawei is keen to sharing our insights and thinking with our partners, as well as organizations and individuals who are interested in green and sustainable development.

Trend 1: PV+ESS Generator

As more renewable energy is feeding into power grids, various complex technical problems arise in terms of system stability, power balance, and power quality.

Therefore, a new control mode is needed to increase active/reactive power control and response capability, and actively mitigate frequency and voltage fluctuations. With the integration of PV and ESS as well as the Grid Forming technology, we can build ‘Smart PV+ESS Generators’ that use voltage source control instead of current source control, provides strong inertia support, transient voltage stabilization, and fault ride-through capabilities. This will transform PV from grid following to grid forming, helping increase PV feed-in.

A milestone in practice of these technologies was the Red Sea project in Saudi Arabia, which Huawei provided a complete set of solution including smart PV controller, lithium battery energy storage system (BESS) as one of the major partners. This project uses 400 MW PV and 1.3 GWh ESS to support the power grid which replaces traditional diesel generators and provides clean and stable power for 1 million people, building the world’s first city powered by 100% renewable energy.

Trend 2: High Density and Reliability

High power and reliability of equipment in PV plants will be the trend. Take PV inverters as an example, nowadays, the DC voltage of inverters is increased from 1100 V to 1500 V. With the application of new materials such as silicon carbide (SiC) and gallium nitride (GaN), as well as the full integration of digital, power electronics, and thermal management technologies, it is estimated that the power density of inverters will increase by about 50% in the next five years, and the high reliability can be maintained.

The 2.2 GW PV plant in Qinghai, China is 3100 m above sea level and has 9216 Huawei Smart PV Controllers (inverters) running stably in this harsh environment. The total availability hours of Huawei inverters exceed 20 million hours, and the availability reaches 99.999%.

Trend 3: Module-Level Power Electronics (MLPE)

Driven by industry policies and technology advancement, distributed PV has witnessed vigorous development in recent years. We are facing challenges such as how to improve the utilization of rooftop resources, ensure high energy yield, and how to ensure the PV+ESS system safety. Therefore, more refined management is a must.

In a PV system, module-level power electronics (MLPE) refer to power electronic equipment that can perform refined control on one or more PV modules, including micro inverters, power optimizers, and disconnectors. MLPE brings unique values such as module-level power generation, monitoring, and safe shutdown. As PV systems are becoming safer and more intelligent, the penetration rate of MLPE in the distributed PV market is expected to reach 20% to 30% by 2027.

Trend 4: String Energy Storage

Compared with traditional centralized ESS solutions, the Smart String ESS solution adopts a distributed architecture and modular design. It uses innovative technologies and digital intelligent management to optimize energy at the battery pack level and control energy at the rack level. This results in more discharge energy, optimal investment, simple O&M, as well as safety and reliability throughout the lifecycle of the ESS.

In 2022, in the 200 MW/200 MWh ESS project in Singapore for the purpose of frequency regulation and spinning reserve, the largest BESS project in Southeast Asia, the Smart String ESS implements refined charge and discharge management to achieve constant power output for a longer time and ensure frequency regulation benefits. In addition, the automatic SOC calibration function at the battery pack level reduces labor costs and greatly improves O&M efficiency.

Trend 5: Cell-Level Refined Management

Similar to PV systems shifting towards MLPE, lithium BESSs are set to develop towards smaller management level. Only refined management at battery cell level can better cope with the efficiency and safety problems. Currently, the traditional battery management system (BMS) can only summarize and analyze limited data, and it is almost impossible to detect faults and generate warnings in the early stage. Therefore, BMS needs to be more sensitive, intelligent, and even predictive. This depends on the collection, computing, and processing of a large amount of data, and AI technologies to find the optimal operating mode and make forecasts.

Trend 6: PV+ESS+Grid Integration

On the power generation side, we see more and more practices of building clean energy bases of PV+ESS that supply electricity to load centers through UHV power transmission lines. On the power consumption side, virtual power plants (VPPs) become increasingly popular in many countries. VPPs combine massive distributed PV systems, ESSs, and controllable loads, and implement flexible scheduling to power generation units and storage units to achieve peak shaving etc.

Therefore, building a stable energy system that integrates the PV+ESS+Grid to support PV power supply and feed-in to grid will become a key measure to ensure energy security. We can integrate digital, power electronics, and energy storage technologies to achieve multi-energy complementation. Virtual Power Plants (VPPs) can intelligently manage, operate, and trade power of massive distributed PV+ESS systems thru multiple technologies including 5G, AI, and cloud technologies, which will come into practice in more countries.

Trend 7: Upgraded Safety

Safety is the cornerstone of the PV & ESS industry development. This requires us to systematically consider all scenarios and links and fully integrate power electronics, electrochemical, thermal management, and digital technologies to upgrade system safety. In a PV plant, faults caused by the DC side account for more than 70% of all faults. Therefore, the inverter needs to support smart string disconnection and automatic connector detection. In distributed PV scenario, the AFCI (Arc Fault Circuit Breaker) function will become a standard configuration, and the module-level rapid shutdown function will ensure the safety of maintenance personnel and firefighters. In ESS scenario, multiple technologies, such as power electronics, cloud, and AI, need to be used to implement refined management of ESS from battery cells to whole system. The traditional protection mode based on passive response and physical isolation is changed to active automatic protection, implementing multi-dimensional safety design from hardware to software and from structure to algorithm.

Trend 8: Security and Trustworthiness

In addition to bringing benefits, PV systems also have various risks, including equipment safety and information security. Equipment safety risks mainly refer to the shutdown caused by faults. Information security risks refer to external network attacks. To cope with these challenges and threats, enterprises and organizations need to establish a complete set of “security and trustworthiness” management mechanisms, including the reliability, availability, security, and resilience of systems and devices. We also need to implement protection for personal and environmental safety as well as data privacy.

Trend 9: Digitalization

Conventional PV plants have a large amount of equipment and lack information collection and reporting channels. Most of the equipment cannot ‘communicate’ with each other which is very difficult to implement refined management.

With the introduction of advanced digital technologies such as 5G, the Internet of Things (IoT), cloud computing, sensing technologies, and big data, PV plants can send and receive information, using “bits” (information flows) to manage “watts” (energy flows). The entire link of generation-transmission-storage-distribution-consumption is visible, manageable, and controllable.

Trend 10: AI Application

As the energy industry moves towards an era of data, how to better collect, utilize, and maximize the value of data has become one of the top concerns of the entire industry.

AI technologies can be widely applied to renewable energy fields, and play an indispensable role in the entire lifecycle of PV+ESS, including manufacturing, construction, O&M, optimization, and operation. The convergence of AI and technologies such as cloud computing and big data is deepening, and the tool chain focusing on data processing, model training, deployment and operation, and safety monitoring will be enriched. In the renewable energy field, AI, like power electronics and digital technologies, will drive profound industry transformation.

At the end, Chen Guoguang remarked that the converged applications of 5G, cloud, and AI are shaping a world where all things can sense, all things are connected, and all things are intelligent. It is coming faster than we think. Huawei identifies the top 10 trends of the PV industry and describes a green and intelligent world in the near future. We hope that people from all walks of life can join hands to achieve the goals of carbon neutrality and build a greener, better future.

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China maximumly reduces COVID-19’s impacts on economic, social development

BEIJING, Dec. 26, 2022 /PRNewswire/ — A report from People’s Daily: As China optimizes its pandemic response measures, regions across the country have resumed work, industrial production and commercial activities.

A tunnel of the Shenyang-Baishan high-speed railway in Baishan city, northeast China’s Jilin province has resumed construction; in the Haikou International Duty Free City in south China’s Hainan province, consumers are lining up in front of cashiers; an enterprise in Changde, central China’s Hunan province recently received a 20-million-yuan ($2.87 million) export order…

In 2020, China became the first major economy to attain positive economic growth; in 2021, the country’s GDP topped 114 trillion yuan, with its two-year average growth standing at 5.1 percent; this year, the Chinese economy withstood pressure and kept consolidating the trend of recovery.

Practices proved that China has explored a path that well coordinates pandemic control and economic and social development. The country has to the maximum extent protected people’s lives and health, and reduced the impacts from COVID-19 on economic and social development to the fullest.

Coping with COVID-19 is a major test of the century, in which the most important thing is to ensure the safety of the people while advancing economy and livelihood. In the recent three years, China has constantly adjusted and optimized its prevention and control measures in accordance with the new features of the variants and the development of the pandemic.

Over the recent three years, China has offered over a trillion yuan in tax relief for individual businesses and seen its annual grain output standing at more than 650 billion kilograms. It has launched a series of signature projects to promote high-quality development and released domestic demand through halving vehicle purchase tax and issuing consumption coupons.

China has coped with difficulties with science-based policies. It front-loaded and strengthened macro policies and accelerated the targeted implementation of micro policies, which boosted the confidence and relieved the burden of market entities. The country’s efforts stabilized the general economic and social development and realized economic recovery.

Now China has come to a new stage of pandemic response and optimized its control measures in accordance with the dynamics of COVID-19. It is earnestly implementing the new control measures, ensuring medical supply and services for the people, focusing on the control work for seniors and people with underlying diseases, ensuring people’s health and preventing patients from developing critical symptoms.

At present, the momentum for China’s rapid economic rebound is being accumulated and released. The Chinese economy enjoys strong resilience, huge potential and strong vitality. The fundamentals sustaining China’s long-term economic growth remain unchanged, and so do the factors supporting the country’s high-quality development.

It is believed that as China further implements its new COVID-19 response measures and the country’s policies to stabilize its economy continue taking effect, China’s economic and social vitality will be released to the maximum extent, contributing to the country’s economic recovery.

China to End Quarantine on Arrival in Fresh COVID Rule Relaxation

China said Monday it would scrap mandatory quarantine on arrival, further unwinding years of strict virus controls as the country battles a surge in cases.

Having mostly cut itself off from the rest of the world during the pandemic, China is now experiencing an unprecedented surge in infections after abruptly lifting restrictions that torpedoed the economy and sparked nationwide protests.

And in a sudden end to nearly three years of strict border controls, Beijing said late Monday it would scrap mandatory quarantines for overseas travelers.

Since March 2020, all passengers arriving in China have had to undergo mandatory centralized quarantine. This decreased from three weeks to one week this summer, and to five days last month.

But under new rules that will take effect January 8, when COVID-19 will be downgraded to a Class B infectious disease from Class A, they will no longer need to.

“According to the national health quarantine law, infectious disease quarantine measures will no longer be taken against inbound travelers and goods,” the National Health Commission (NHC) said.

The move is likely to be greeted with joy from Chinese citizens and diaspora unable to return and see relatives for much of the pandemic.

But it comes as China faces a wave of cases that studies have estimated could kill around one million people over the next few months.

Many are now grappling with shortages of medicine, while emergency medical facilities are strained by an influx of undervaccinated elderly patients.

“At present, COVID-19 prevention and control in China are facing a new situation and new tasks,” President Xi Jinping said in a directive Monday, according to state broadcaster CCTV.

“We should launch the patriotic health campaign in a more targeted way… fortify a community line of defense for epidemic prevention and control, and effectively protect people’s lives, safety and health,” he said.

‘Impossible’ to track

Hospitals and crematoriums across the country have been overflowing with COVID patients and victims, while the NHC on Sunday announced it would stop publishing daily nationwide infection and death statistics.

That decision followed concerns that the country’s wave of infections is not being accurately reflected in official statistics.

Beijing has admitted the scale of the outbreak has become “impossible” to track following the end of mandatory mass testing.

And last week, the government narrowed the criteria by which COVID-19 fatalities were counted — a move experts said would suppress the number of deaths attributable to the virus.

The winter surge comes ahead of two major public holidays next month, in which millions of people are expected to travel to their hometowns to reunite with relatives.

Authorities are expecting the virus to hit under-resourced rural areas hard, and on Monday called for the guaranteed supply of drugs and medical treatment during New Year’s Day and late January’s week-long Lunar New Year holiday.

In recent days, health officials in the wealthy coastal province Zhejiang estimated that one million residents were being infected per day.

The coastal city of Qingdao also predicted roughly 500,000 new daily infections and the southern manufacturing city of Dongguan eyed up to 300,000.

Unofficial surveys and modelling based on search engine terms suggest that the wave may have already peaked in some major cities like Beijing and Chongqing.

A poll of over 150,000 residents of the southwestern province of Sichuan organized by disease control officials showed that 63% had tested positive for COVID, and estimated that infections peaked Friday.

Only six COVID deaths have been officially reported since Beijing unwound most of its restrictions earlier this month.

But crematorium workers interviewed by AFP have reported an unusually high influx of bodies, while hospitals have said they are tallying multiple fatalities per day, as emergency wards fill up.

The main funeral service center in the southern metropolis of Guangzhou postponed all ceremonies until January 10 to focus on cremations due to the “large workload,” according to a notice published online Sunday.

China’s censors and mouthpieces have been working overtime to spin the decision to scrap strict travel curbs, quarantines and snap lockdowns as a victory, even as cases soar.

Source: Voice of America

Long COVID: Could Mono Virus or Fat Cells Be Playing Roles?

A British historian, an Italian archaeologist and an American preschool teacher have never met in person, but they share a prominent pandemic bond.

Plagued by eerily similar symptoms, the three women are credited with describing, naming and helping bring long COVID into the public’s consciousness in early 2020.

Rachel Pope, of Liverpool, took to Twitter in late March 2020 to describe her bedeviling symptoms, then unnamed, after a coronavirus infection. Elisa Perego in Italy first used the term “long COVID,” in a May tweet that year. Amy Watson in Portland, Oregon, got inspiration in naming her Facebook support group from the trucker cap she’d been wearing, and “long hauler” soon became part of the pandemic lexicon.

Nearly three years into the pandemic, scientists are still trying to figure out why some people get long COVID and why a small portion — including the three women — have lasting symptoms.

Millions of people worldwide have had long COVID, reporting various symptoms including fatigue, lung problems, and brain fog and other neurological symptoms. Evidence suggests most recover substantially within a year, but recent data show that it has contributed to more than 3,500 U.S. deaths.

Here’s some of the latest evidence:

Women more at risk?

Many studies and anecdotal evidence suggest that women are more likely than men to develop long COVID.

There could be biological reasons.

Women’s immune systems generally mount stronger reactions to viruses, bacteria, parasites and other germs, noted Sabra Klein, a Johns Hopkins professor who studies immunity.

Women are also much more likely than men to have autoimmune diseases, where the body mistakenly attacks its own healthy cells. Some scientists believe long COVID could result from an autoimmune response triggered by the virus.

Women’s bodies also tend to have more fat tissue and emerging research suggests the coronavirus may hide in fat after infection. Scientists also are studying whether women’s fluctuating hormone levels may increase the risks.

Another possible factor: Women are more likely than men to seek health care and often more attuned to changes in their bodies, Klein noted.

“I don’t think we should ignore that,” she said. Biology and behavior are probably both at play, Klein said.

It may thus be no coincidence that it was three women who helped shine the first light on long COVID.

Pope, 46, started chronicling what she was experiencing in March 2020: flu-like symptoms, then her lungs, heart and joints were affected. After a month she started having some “OK” days, but symptoms persisted.

She and some similarly ill colleagues connected with Perego on Twitter. “We started sort of coming together because it was literally the only place where we could do that,” Pope said. “In 2020, we would joke that we’d get together for Christmas and have a party,” Pope said. “Then obviously it went on, and I think we stopped joking.”

Watson started her virtual long haulers group that April. The others soon learned of that nickname and embraced it.

Mono virus

Several studies suggest the ubiquitous Epstein-Barr virus could play a role in some cases of long COVID.

Inflammation caused by coronavirus infection can activate herpes viruses, which remain in the body after causing an acute infection, said Dr. Timothy Henrich, a virus expert at the University of California, San Francisco.

Epstein-Barr virus is among the most common of these herpes viruses: An estimated 90% of the U.S. population has been infected with it. The virus can cause mononucleosis or symptoms that may be dismissed as a cold.

Henrich is among researchers who have found immune markers signaling Epstein-Barr reactivation in the blood of long COVID patients, particularly those with fatigue.

Not all long COVID patients have these markers. But it’s possible that Epstein-Barr is causing symptoms in those who do, although scientists say more study is needed.

Some scientists also believe that Epstein-Barr triggers chronic fatigue syndrome, a condition that bears many similarities to long COVID, but that also is unproven.

Obesity

Obesity is a risk factor for severe COVID-19 infections and scientists are trying to understand why.

Stanford University researchers are among those who have found evidence that the coronavirus can infect fat cells. In a recent study, they found the virus and signs of inflammation in fat tissue taken from people who had died from COVID.

Lab tests showed that the virus can reproduce in fat tissue. That raises the possibility that fat tissue could serve as a “reservoir,” potentially fueling long COVID.

Could removing fat tissue treat or prevent some cases of long COVID? It’s a tantalizing question, but the research is preliminary, said Dr. Catherine Blish, a Stanford infectious diseases professor and a senior author of the study.

Scientists at the University of Texas Southwestern Medical Center are studying leptin, a hormone produced by fat cells that can influence the body’s immune response and promote inflammation.

They plan to study whether injections of a manufactured antibody could reduce leptin levels — and in turn inflammation from coronavirus infections or long COVID.

“We have a good scientific basis together with some preliminary data to argue that we might be on the right track,” said Dr. Philipp Scherer.

Duration

It has been estimated that about 30% of people infected with the coronavirus will develop long COVID, based on data from earlier in the pandemic.

Most people who have lingering, recurrent or new symptoms after infection will recover after about three months. Among those with symptoms at three months, about 15% will continue to have symptoms for at least nine more months, according to a recent study in the Journal of the American Medical Association.

Figuring out who’s at risk for years-long symptoms “is such a complicated question,” said Dr. Lawrence Purpura, an infectious disease expert at Columbia University.

Those with severe infections seem to be more at risk for long COVID, although it can also affect people with mild infections. Those whose infections cause severe lung damage including scarring may experience breathlessness, coughing or fatigue for more than a year. And a smaller group of patients with mild initial COVID-19 infections may develop neurologic symptoms for more than a year, including chronic fatigue and brain fog, Purpura said.

“The majority of patients will eventually recover,” he said. “It’s important for people to know that.”

It’s small consolation for the three women who helped the world recognize long COVID.

Perego, 44, developed heart, lung and neurologic problems and remains seriously ill.

She knows that scientists have learned a lot in a short time, but she says “there is a gap” between long COVID research and medical care.

“We need to translate scientific knowledge into better treatment and policy,” she said.

Watson, approaching 50, says she has “never had any kind of recovery.” She has had severe migraines, plus digestive, nerve and foot problems. Recently she developed severe anemia.

She wishes the medical community had a more organized approach to treating long COVID. Doctors say not knowing the underlying cause or causes makes that difficult.

“I just want my life back,” Watson said, “and it’s not looking like that’s all that possible.”

Source: Voice of America

Malawi: Cholera – DREF n° MDRMW017 – Operation Update No 1

Summary of major revisions made to emergency plan of action:

Malawi Red Cross Society (MRCS) is publishing this update to inform on the actions since the launch of the operation in September 2022 and update stakeholders on the changes resulting from the deterioration of the context on operational imperative.

This operation update is driven by the worsening of the cholera outbreak which has significantly spread over time in terms of magnitude and geographical area. There has been a 95% increase in the number of cholera cases in November (4,766 confirmed cases) compared to October (2434 confirmed cases). Based on this, on 5 December 2022, the State President declared the 2022 Cholera Outbreak a “Public Health Emergency”. As of 5 December, the epidemic included a cumulative total of 11,462 cholera cases with 332 deaths (CFR 2.9%) and 12,854 cases and 47 more deaths on 14 December 2022. This translates to urgent need to strengthen and expand the response engaged in September.

MRCS will continue to engage the Ministry of Health and DoDMA in implementing immediate and long-term cholera control, response, and preventive measures. The Malawi Government also plans to strengthen the roles of MoH and DoDMA in the next phase of the response. The MRCS additional support will help ensure that lives continue to be saved, and a resilient health system is maintained during and beyond the current outbreak.

The proposed revisions are as below:

1 . Increasing the target district to five to include Salima from the initial 4: Nkhatabay, Nkhotakota, Karonga and Mzuzu districts. Movement coordination also put in contribution to support Southern districts where outbreak is also spreading.

2 . Budget is increased from CHF 392,014 to CHF 748,286. Second allocation is CHF 356,272 considering that CHF 226,817 is already implemented by the National Society.

3 . Scale-up of the MRCS through this DREF include:

• Extension of the Emergency Response Team from 580 to 796 (580 volunteers and 216 HAS) to improve coverage for interrupting transmission and improving case management of Cholera at community and facility levels in the affected districts. support the MoH led Oral Cholera Vaccination campaign through social mobilization activities in high-risk districts,

• Deployment of 2 surge profiles to support the technical capacity at National Society and Delegation level, one supported under this DREF and another by regional surge unit.

• Improvement and extension of case management both at facility and community levels through a provision of oral rehydration therapy – support with the setup of 2 Oral Rehydration Points (ORPs) in each of the 5 districts (for a total of 10 ORPs), district versus 4 (one per four districts), initially planned.

• Support with the setup of a total of 10 CTUs. 4 already in place for which additional material will be provided and 1 new for Salima. This support includes provision of tents and temporary latrines, procurement of infection prevention control materials and provision of Personal Equipment (PPEs) for volunteers and HSAs; Task shifting in health facilities to support nurses to deal with the influx of patients.

• Reinforce the social mobilization and awareness activities by engaging more community leaders and through volunteers and mass communication activities extended to 4 months with more visual material, 15 painting, 50 Van publicity, 1500 airing jingles and IEC to be produced and diffused.

• As a new activity based on the need identified, MRCS will include promotion of the nutrition dietary diversification and breastfeeding for children under 2 as a safe fluid intake in cholera affected areas and safe continuation of breast feeding for mothers suffering from Cholera; infant and young child feeding practices

• Increased support to WASH activities and strengthened water management, access to water and WASH hygiene prevention toward the rainy season with:

• Ensuring rehabilitation of 25 boreholes instead of 9 initially planned.

• Support 3 boreholes construction by MoH with Drilling and materials.

MRCS will strengthen the response supervision with dedicated operation coordinator and wash officer to be mobilized to support community health response system strengthening.

Source: International Federation of Red Cross And Red Crescent Societies