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Thứ Sáu, 28 tháng 2, 2020

Storage prevails in France’s capacity auction

The Ministry for the Ecological and Inclusive Transition's long-term auction was organized by grid operator RTE under the French capacity procurement mechanism. Storage accounted for 253 MW of the capacity assigned in the auction, which was open to all decarbonizing technologies.

From pv magazine France

The objective of France’s long-term auction (AOLT) is to enable the development of capacity to secure long-term electricity supply. The winners will benefit from a guaranteed price over seven years under the capacity mechanism, for assets to be put into service in 2020, 2021, 2022, and 2023.

The Ministry for the Ecological and Inclusive Transition of France (MTES) published a complete list of winners this week, with storage taking two-thirds of the capacity up for grabs. French energy service providers RES and Voltalis were among the winning companies. According to Réseau de Transport d’Électricité (RTE), the national transmission system operator, around 253 MW of new storage capacity and 124 MW of new generation capacity was allocated in the procurement exercise.

Although the auction sought capacity for four different time frames, only the 2021-27 and 2022-28 periods were successful. The authorities did not assign any capacity for the 2020-26 and 2023-29 periods.

For the first two time frames, the regulated price was €29,000/MW and €28,000/MW, respectively. Pricing for the other two periods was set at €19,000/MW and €21,800/MW, respectively.

“For each auction, the guaranteed price corresponds to the price offered by the selected offer closest to the price of the demand curve. The demand curve, reflecting the value brought to the community, was proposed by RTE and approved by the Minister of Ecological and Solidarity Transition and the Energy Regulation Commission,” RTE said.

For 2021-27, eight projects were selected, representing 151.1 MW in total, including 93 MW of storage and 58.1 MW for generation. For 2022-28, another 225.7 MW was allocated, of which 159.7 MW went to battery systems and 66 MW to generating plants.

In terms of storage, Total – via its subsidiary, BHC Energy – won 103 MW, with 58 MW for the 2021-27 period and 45 MW for 2022-28. AFD7, a project company owned by Amarenco France, won a 75 MW project for the 2022-28 period, while RES won two 24 MW projects. The other winners of smaller projects, ranging from 1 MW to 7.6 MW, were ZE Energy, Valorem, Entech, Neoen, Aloe Energy, and Innergex.

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Employee engagement: Tips to retain top talent at your solar company

By the Omnia Group When moving to solar power, your customers are making a huge investment and changing the way they think about energy. Plus, there are many factors for them to consider when buying solar panels such as roof space, mounting, type of panel, inverter efficiency and product warranties. Thankfully, maintenance is low and…

The post Employee engagement: Tips to retain top talent at your solar company appeared first on Solar Power World.

EMC to work with Corning’s flexible Willow Glass for printed perovskite solar cells

American solar innovation company Energy Materials Corporation (EMC) signed a joint development agreement (JDA) with Corning Inc. Working together, the companies are focused on bringing low-cost, high-performance perovskite solar photovoltaic panels and products to the energy industry. The JDA focuses both companies’ respective industry leading capabilities using Corning’s flexible Willow Glass as the printing substrate…

The post EMC to work with Corning’s flexible Willow Glass for printed perovskite solar cells appeared first on Solar Power World.

Quantum dot hybrid HTJ cell with 12.82% efficiency

South Korean researchers have developed a hybrid tandem solar cell based on quantum dots and organic bulk heterojunction (BHJ) photoactive materials. They claim that the cell could reach an efficiency rate of around 15% if they continue to reduce energy losses in the quantum dot cell and enhance near-infrared absorption.

Scientists from South Korea’s Ulsan National Institute of Science and Technology (UNIST) have developed hybrid tandem solar cells with quantum dots and organic bulk heterojunction (BHJ) photoactive materials, for which they claim to have achieved a conversion efficiency of 12.82%.

This efficiency level is among the highest recorded for single-junction and tandem devices, the research team claimed, while adding that the rate was achieved by optimizing the short-circuit current density balance of each sub‐cell. The achieved efficiency is also higher than that of each single-junction device, which is 11.17% for the quantum dot device and 11.02% for the organic BHJ device.

They said that the organic bulk heterojunction photoactive materials with which the cell was hybridized are designed to compensate for the external quantum efficiency (EQE) loss in the near-infrared (NIR) region. “The NIR-absorbing organic BHJ devices were employed as the back sub-cells to harvest the transmitted NIR photons from the CQD front sub-cells,” they explained.

Although quantum dots are good at absorbing light in the NIR, they may not be able to absorb light in all of the cell areas, the researchers said.

“This study suggests a potential route to improve the performance of CQDPVs by proper hybridization with NIR-absorbing photoactive materials,” they said, noting that they are convinced that the new cell could reach an efficiency rate of around 15% if they continue to reduce energy loss in the quantum dot cell and enhance NIR absorption.

The research team manufactured the cell through a simple production process and at room temperature. It exhibited almost negligible degradation after air storage for three months, they noted. The cell is described in the study Efficient Hybrid Tandem Solar Cells Based on Optical Reinforcement of Colloidal Quantum Dots with Organic Bulk Heterojunctions, published in Advanced Energy Materials.

This is your SolarWakeup for February 28th, 2020

Friday Rundown.Big news on the rundown today, moving parts all over the Country in markets and issues within supply chains and DC. It’s always helpful to read what public companies are saying to get a grip of the market and risks around our market. Now that Sunrun, Enphase, Solaredge, SunPower and Sunnova have reported, take the weekend to read some filings..
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Have A Great Weekend!

Opinion

Post and Courier: Editorial – SC needs more solar energy, don’t let Dominion delay it

Best, Yann

The post This is your SolarWakeup for February 28th, 2020 appeared first on SolarWakeup.com.

Integrating stress and temperature sensors in crystalline silicon cells

Fraunhofer ISE researchers have integrated stress and temperature sensors within a PV module. They claim that the devices cover a very minimal part of the cells, and that their interaction with the module and the cell itself is quite limited. The sensors can be manufactured as part of a regular cell manufacturing process.

A research team from Germany’s Fraunhofer Institute for Solar Energy Systems ISE are developing ways to integrate stress and temperature sensors into crystalline solar cell wafers, in order to achieve direct and continuous measurement in conventional PV module setups.

The scientists explained that the tested sensors cover a very minimal part of the cell, and that their interaction with the module and the cell itself is quite limited. The sensors can be produced through a regular solar cell manufacturing process, they claimed, and can be applied to both the front and back sides of the cells.

“Also, existing solar cell production lines could be modified for the sensor implementation,” they wrote in Silicon solar cell–integrated stress and temperature sensors for photovoltaic modules, published in Progress in Photovoltaics.

The research team said that the stress sensor is piezoresistive, which means that it is able to respond to externally induced mechanical stress through changes in its electrical resistance. The device was applied to float zone solar cell wafers made of p‐type monocrystalline silicon. “The stress sensor is realized as a rectangular piezoresistive resistor using high local n‐doping by ion implantation and subsequent silver metallization,” the researchers said.

The sensor was laminated using a conventional PV module setup, with a 14.7×10.5‐cm² and 1‐mm thin glass, ethyl vinyl acetate (EVA) film, and a Tedlar Polyester Tedlar (TPT) backsheet.

The process to embed the temperature sensor followed the same proceedings for the metallization that were adopted for the stress sensor. The researchers defined the process as common practice for the contact formation of high‐efficiency solar cells.

The integration of the sensors was tested with six different designs. “All designs resolve the stress in the test specimens and have sensitivities in the range between −45 and −65%/grade point average (GPA),” the scientists stated. “The module integration of this design shows that the sensors are capable of measuring the stress in laminated solar cells.”

The laminated sensors showed good stability in 145 temperature cycles from −35°C to +85°C, the research team said. They added that the devices are only being used for R&D purposes, and that the path to commercialization will require further research.

Australia’s AEMC rejects new rule for calculating transmission losses

The Australian network regulator has ignored pleas from some of the biggest solar and wind project owners in Australia to change the way marginal loss factors (MLFs) are calculated. While it has acknowledged that transmission has failed to keep pace with renewable energy investment, it did not offer any suggestions on what should be done to ameliorate the problem.

From pv magazine Australia

The Australian Energy Market Commission (AEMC) has rejected a request to change how transmission losses are calculated. much to the disappointment of large-scale renewable energy investors. Coupled with connection delays and extra firming required by regulators, worsening transmission losses – known as marginal loss factors (MLFs) – have been a major hurdle for wind and solar developers in Australia.

The consultations on changes to MLFs were opened in June 2019 on the request of Adani Renewables, which proposed the allocation of intraregional settlement residues (IRSRs). Other big investors later backed the Indian developer’s proposal to move to average loss factors (ALFs), arguing that the new system would simplify the way transmission losses are calculated and increase certainty by averaging out losses instead of applying them based on the circumstances of individual generators.

The AEMC rejected the proposal on Thursday. It justified its decision as a way to protect consumers from bearing the cost of electricity losses. This came as no surprise, given the AEMC’s draft determination in November, which described ALFs as a wealth transfer from customers to generators, and said that it dampened signals to build assets in good locations. “Consumers shouldn’t have the cost of individual business decisions simply transferred to them,” AEMC Chairman John Pierce said.

What is not mentioned, however, is that the businesses are solely responsible for building the new generation, which is reducing the nation’s supply shortfall and driving down wholesale prices. In return, they expect fair market conditions without the risk of MLFs hurting their revenues by 10% to 20%, which may come as a result of the decisions of other generators to join the same part of the grid.

No options

But the AEMC said on Thursday that there is no need to create new rules to help accommodate the influx of renewable generation in the grid. The network regulator said that it agreed that volatility and uncertainty are affecting the investment environment, but it disagreed on the reason. It said that worsening MLFs are just a symptom of the rapid energy transition of the National Electricity Market (NEM).

“The rapid pace of renewable investment has meant that generation has got ahead of transmission,” Pierce said. “Changing to ALFs could increase total losses, which means more electricity needs to be generated to meet consumer demand. It could also increase wholesale energy prices and overall make the operation of the NEM less efficient.”

A group of 25 leading renewable energy investors known as the Clean Energy Investment Group –representing investments of more than 6.5 GW of installed capacity and a development pipeline in excess of 10 GW, including names such as John Laing, Total Eren, Innogy, BlackRock and Neoen – said the AEMC decision was disappointing, but not surprising.

“Sadly, the AEMC blame the volatility of the MLF on the transformation currently underway from thermal to renewable energy,” the group said in a post on LinkedIn. “The decision seems to be all about maintaining the status quo to slow or stop the transformation rather than embracing the transformation and doing everything in their power to ensure it is achieved at the lowest cost to consumers.”

‘Deeply problematic’

According to the Clean Energy Council (CEC), the AEMC decision to retain the existing MLF regime, which is “no longer fit-for-purpose,” will further undermine investor confidence in new clean energy generation. In the past year, the lack of investor confidence has already seen new investment in large-scale renewables collapse by more than 50%, according to data from both the CEC and BloombergNEF.

CEC Chief Executive Kane Thornton said the decision to retain the existing regime did not reflect the needs of the current Australian energy industry.

“While industry welcomes debate and analysis of alternative reforms, simply retaining the current regime is deeply problematic and undermines the energy transition underway in Australia,” Thornton said. “We had expected that the AEMC would consider how losses could be shared by generators in a way that presents less volatility and more manageable risk, without increasing consumer costs or ignoring transmission losses.”

According to Thornton, the AEMC has missed an opportunity to think openly and creatively about reforming the currently flawed MLF framework. He said it undertook very little of its own analysis regarding the possible options, to the disappointment of the entire industry.