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54 results for “Curtailment”
CROSSBOW HLU2-UC4-TC4 Simulated curtailments at Konjsko substation
<p>For the evaluation of the curtailment distribution algorithm, an experiment was made with the forecast generation from TS Konjsko and the simulation of 30 limitations applied on random days.</p>
CROSSBOW HLU2-UC1-TC1 measurements: Substation measurements gathered during curtailment activation
<p>The data comprises the measurements read at the Konjsko substation before, during and after a curtailment in Pometeno Brno plant.</p> <p>The measurements gathered from the SCADA are:</p> <ul> <li>P, Q and V of the 110, 220 and 400 Kv buses at the substation</li> </ul> <p>P, Q and V of the line connecting the substation with the plant</p>
CROSSBOW HLU2-UC4-TC6 Simulated curtailments at Crete
<p>For the evaluation of the curtailment distribution algorithm, an experiment was made with the forecast generation or RES assets in the area of Crete, Greece and the simulation of 30 limitations applied on random days</p>
CROSSBOW HLU2-UC4-TC4 Simulated curtailments the area of Tariverde, Romania
<p>For the evaluation of the curtailment distribution algorithm, an experiment was made with the forecast generation or RES assets in the area of Tariverde and the simulation of 30 limitations applied on random days</p>
CROSSBOW HLU2-UC7-TC4 Real curtailment required to reduce cross-border congestion
<p>This dataset summarizes the amount of energy that should be curtailed in order to obtain the desired reduction at the monitored cross-border line.</p> <p>This amount is not linear and depending on the congestion size, the curtailment cost might be really expensive. This data summarizes the KPI results of analysing the real curtailment requirements when facing different congestions. Two scenarios are considered:</p> <ul> <li>In the line between substations GKORIN and G1ARGOS</li> <li>In the line between substations G2PATR31 and GSIMOP31</li> </ul> <p>For each unit of power reduction needed (x-axis) the corresponding curtailment required is presented (y-axis)</p>
CROSSBOW HLU2-UC1-TC1 measurements: Substation measurements gathered during curtailment activation. Second test
<p>. Capture on 21/04/2022</p> <p>The data comprises the 2 sec measurements from HOPS SCADA system for for the Konjsko substation before, during and after a curtailment in Pometeno Brno plant (21:00 - 22:30 on 21/04/2022).</p> <p>The measurements gathered from the SCADA are:</p> <ul> <li>P, Q and V of the 110, 220 and 400 Kv buses at the substation</li> </ul> <p>P, Q and V of the line connecting the substation with the plant</p>
Confirmation that eagle fatalities can be reduced by automated curtailment of wind turbines
<p>1. Automated curtailment is potentially a powerful technique to reduce collision mortality of wildlife with wind turbines. Previously, we used a before-after-control-impact framework to demonstrate that eagle fatalities declined after automated curtailment was implemented with the IdentiFlight system at a wind power facility in Wyoming, USA. We received substantial interest and feedback regarding our study and, here, we implement several analytical suggestions and include more recent data that strengthen the inference we draw from our results.</p> <p>2. The five main analytical suggestions we received were to 1) exclude from analysis data that were collected during the period when automated curtailment was only partially implemented; 2) only analyze data from a single make and model of turbine; 3) evaluate changes in the rate of fatality, instead of the yearly numbers of fatalities that result from fluctuations around that rate; 4) calculate the standard measure determining effects of a treatment in a before-after-control-impact study; and, 5) examine yearly fluctuations of the fatality rate during the before period.</p> <p>3. After incorporating these suggestions and including additional data collected since the prior paper was published, our results confirm prior work. We demonstrate that eagle fatalities were reduced by 85% (95% highest density interval = 12%, 100%) after implementation of automated curtailment. Rate of fatalities declined by 2.85 eagles per year (-0.67, 5.70) between before and after periods at the treatment site and increased by 2.26 eagles per year (-7.37, 1.77) at the control site. Overall, the fatality rate declined by 4.91 (-0.27, 11.27) more eagles per year at the treatment site than at the control site. The probability that the fatality rate declined at the treatment site relative to the control site was 0.97.</p> <p>4. Our re-analysis strengthens our inference by using more robust analyses and data to support the conclusions of the prior study suggesting that automated curtailment was effective at reducing eagle fatalities at our treatment site. Because of the site- and species-specific nature of our work, future research should examine the efficacy of automated curtailment at other sites, with other species, and under different curtailment regimes.</p>
No seasonal curtailment of the Eurasian Skylark's (Alauda arvensis) breeding season in German heterogeneous farmland
<p><span>The lack of suitable nesting sites is one key driver behind the farmland bird crisis in Europe. Winter cereals become impenetrable for ground-breeding birds like the Eurasian Skylark (<em>Alauda arvensis</em>), curtailing breeding time. Stable Skylark populations depend on multiple breeding attempts per year; thus, the widespread cultivation of winter cereals has strongly contributed to their tremendous decline. Crop diversification is thought to be a potential measure to counteract this development. Therefore, we explored</span> <span>how individual Skylarks respond to the decreasing suitability of winter cereals as nesting habitat in heterogeneous but otherwise conventionally managed farmland. Our study focused on: i) the degree to which Skylarks prematurely cease nesting activity, switch nesting habitats, or breed on linear structures like tramlines. Additionally, we analyzed: ii) if nest success decreases throughout the breeding season and iii) how often Skylarks make a successful breeding attempt per year. We radio-tagged 28 adults in a German population during April 2018 and 2019, tracked half of them for more than 3 months, and measured their breeding success. Additionally, we monitored nests of untagged pairs, resulting in 96 nests found. None, except one tagged individual, stopped breeding activity before July 1st. Home ranges were mainly stable, but Skylarks switched nesting habitats away from winter cereals to crops like sugar beet or set-aside. High-risk nesting sites like corn and linear structures played a minor role in breeding. Overall, Mayfield logistic regressions revealed no seasonal decrease in nest success, and tagged Skylarks had sufficient time to make 1.5 – 1.8 breeding attempts, of which 0.8 were successful. We suggest that heterogeneous farmland in our study area, which enabled diversely composed home ranges, prevented a curtailment of the breeding season. Thus, our study reinforces the need for crop diversification which gives Skylarks a chance to survive in modern farmland. </span></p>
TRINITY DC 02.08.01 Curtailment distribution in the area of Greece
<p>The experiment will take advantage of the possibility of the T-RES platform to distribute the limitation (curtailments) sent by the TSO among the RES assets in a portfolio (always respecting TSO limits). This distribution could be done based on different algorithms: uniform, shedding rota and generator size.</p> <p>The target of this experiment is to measure the impact of curtailments sent by TSO’s in the overall performance of a RES portfolio in (including an aggregation of renewables in a given area) and to test the behaviour of the aforementioned curtailment distribution mechanisms.</p> <p>These datasets contain the following data:</p> <ul> <li>"day-ahead-prices-GR2022.xlsx" contains day ahead prices of Greece for the year 2022.</li> <li>"gr-market-scada-units-2022-anon.xlsx" this dataset contains production data from 135 assets. Only assets 20, 30, 33, 52 y 87 have been used for the aggregation.</li> </ul>
Confirmation that eagle fatalities can be reduced by automated curtailment of wind turbines
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No seasonal curtailment of the Eurasian Skylark’s (Alauda arvensis) breeding season in German heterogeneous farmland
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Data from: Automated curtailment of wind turbines reduces eagle fatalities
<ol> <li>Collision-caused fatalities of animals at wind power facilities create a 'green versus green' conflict between wildlife conservation and renewable energy. These fatalities can be mitigated via informed curtailment whereby turbines are slowed or stopped when wildlife are considered at increased risk of collision. Automated monitoring systems could improve efficacy of informed curtailment, yet such technology is undertested.</li> <li>We test the efficacy of an automated curtailment system—a camera system that detects flying objects, classifies them, and decides whether to curtail individual turbines to avoid potential collision—in reducing counts of fatalities of eagles, at Top of the World Windpower Facility (hereafter, the treatment site) in Wyoming, USA. We perform a before-after-control-impact study, comparing the number of eagle fatalities observed at the treatment site with those at a nearby (15 km) control site without automated curtailment, both before and after the implementation of automated curtailment at the treatment site.</li> <li>After correcting for carcass detection probability and scaling fatality estimates to turbine-years, we estimate that the number of fatalities at the treatment site declined by 63% (95% CI = 59% – 66%) between before and after periods while increasing at the control site by 113% (51% – 218%). In total, there was an 82% (75% – 89%) reduction in the fatality rate at the treatment site relative to the control site.</li> <li> <i>Synthesis and applications.</i> Automated curtailment of wind turbine operation substantially reduced eagle fatalities. This technology therefore has the potential to lessen the conflict between wind energy and raptor conservation. Although automated curtailment reduced fatalities, they were not fully eliminated. Therefore, automated curtailment, as implemented here, is not a panacea and its efficacy could be improved if considered in conjunction with other mitigation actions.</li> </ol>
Wind turbines without curtailment produce large numbers of bat fatalities throughout their lifetime: A call against ignorance and neglect
<p>Bats are protected by national and international legislation in European countries, yet many species, particularly migratory aerial insectivores, collide with wind turbines which counteracts conservation efforts. Within the European Union it is legally required<br> to curtail the operation of wind turbines at periods of high bat activity, yet this is not practiced at old wind turbines. Based on data from the national carcass repository in Germany and from our own carcass searches at a wind park with three turbines west<br> of Berlin, we evaluated the magnitude of bat casualties at old, potentially mal-sited wind turbines operating without curtailment. We report 88 documented bat carcasses collected by various searchers over the 20-year operation period of this wind park from<br> 2001 to 2021. Common noctule bats ( Nyctalus noctula ) and common pipistrelles (Pipistrellus pipistrellus ) were most often found dead at these turbines. Our search campaign in August and September 2021 yielded a total of 18 carcasses. We estimated that at least 209 bats were likely killed during our field survey, yielding more than 70 casualties/wind turbine or 39 casualties/MW in two months. Since our campaign covered only part of the migration season, we consider this value as an underestimate. The 20-year period of the wind park emphasises the substantial impact old turbines may have on bat individuals and populations when operating without curtailments. We call for reconsidering the operation procedures of old wind turbines to stop the continuous loss of bats in Germany and other countries where turbine curtailments are even less practiced than in Germany.</p>
Input data and code related to "Utilizing curtailed wind and solar power to scale up electrolytic hydrogen production in Europe"
<p>Datasets and code for the submitted article: "Utilizing curtailed wind and solar power to scale up electrolytic hydrogen production in Europe" </p> <p>by Alissa Ganter<sup>1,2</sup>, Tyler H. Ruggles<sup>2</sup>, Paolo Gabrielli<sup>1</sup>, Giovanni Sansavini<sup>1,*</sup>, Ken Caldeira<sup>2</sup></p> <p><sup>1</sup> Institute of Energy and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland</p> <p><sup>2</sup> Department of Global Ecology, Carnegie Institution for Science, Stanford, CA, USA</p> <p><sup>*</sup> Corresponding author: email - sansavig@ethz.ch</p> <p>All rights lie with the authors. Refer to the README.docx for a description of the datasets and their usage in the article.</p>
Drivers of bat activity at wind turbines advocate for mitigating bat exposure using multicriteria algorithm-based curtailment
<p>data used for the paper</p>
Data from: Automated curtailment of wind turbines reduces eagle fatalities
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Nodal LMP and Renewable Curtailment Data in Support of Unlocking the Potential of Renewable Energy Through Curtailment Prediction
<p>This data was collected to support research projects like the ones proposed in our presentation at the Climate Change Workshop at NeurIPS 2023, "Unlocking the Potential of Renewable Energy Through Curtailment Prediction"</p><p>Location Marginal Price (LMP) and renewable curtailment data are provided for two major ISOs in the US: SPP and ERCOT. Data covers the dates 2021-01-01 until 2023-09-30. All timestamps are provided in UTC, pricing information is in US Dollars and curtailment is provided in megawatts. This data was retrieved from the respective ISOs data portals and processed into a concise and collated format. Data provided here is copyright of the publishing ISO, and subject to their terms of use agreements. ERCOT's terms of use can be read <a href="https://www.ercot.com/help/terms">here</a>, and SPP's terms of use are available <a href="https://www.spp.org/terms-conditions/">here</a>. Both ISOs permit redistribution of their materials, but SPP requires express written authorization for commercial use.</p><p>We are not able to publish data for additional ISOs until we receive their permission to do so. However, we have compiled a table of locations where the ISOs publish the data in the document <a href="https://zenodo.org/api/records/10235806/draft/files/ISO_curtailment_LMP_data_availability.ods/content">ISO_curtailment_LMP_data_availability.ods</a></p>
How Can Prefabricated Membranes Load Ascorbic Acid Can Curtail Gingival Recession?
ClinicalTrials.gov study NCT06936592. IPD Sharing: NO. Countries: 0. Publications: 1.
Data from: Modelling the impact of curtailing antibiotic usage in food animals on antibiotic resistance in humans
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Inhibition of granuloma triglyceride synthesis imparts control of Mycobacterium tuberculosis through curtailed inflammatory responses
GEO Series GSE179437. Mus musculus. 22 samples. Type: Expression profiling by high throughput sequencing.
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