Soltec’s ‘Dy-WIND’ technology tackles dynamic effects of wind on solar tracker structures and panels

Share on facebook
Facebook
Share on twitter
Twitter
Share on linkedin
LinkedIn
Share on reddit
Reddit
Share on email
Email
Using computational calculations and CFD simulation models, it is possible to create 3D numerical models that with great precision, reproduce the structural behavior of solar trackers when subjected to wind loads as would be encountered in the field. Image: Soltec

Wind consultancy firm RWDI, in collaboration with tracker system specialist Soltec, have developed a new method for comprehensive dynamic analysis in tracker wind-design to give the stability needed to a PV power plant installed at an extreme location or exposed to high winds. Dy-WIND is a combination of DAF + FAM + BAM as a new standard in tracker multi-array design analysis. 

Problem

Extreme winds can damage the tracker structure and produce extra structural costs for a PV power plant. Several studies have shown that the current regulations applicable to solar trackers are not sufficient to size these structures, since they do not consider the second order effects produced by the action of the wind when it impacts the in-situ tracker. To prevent structural failures, it is necessary to take several factors into consideration and to use new methodologies that can quantify the response of these structures, preventing possible failures by means of a suitable design.

Solution

Using computational calculations and CFD simulation models, it is possible to create 3D numerical models that, with great precision, reproduce the structural behaviour of solar trackers when subjected to wind loads as would be encountered in the field. These 3D numerical models are complemented and validated by wind tunnel tests using scaled rigid models and pressure collectors, which enable the pressure coefficients on the PV power plant to be obtained accurately and, importantly, to include the structural response moments for different tilt tracker angles and different wind angles of incidence. The Dy-WIND product is a code-challenging analysis method applied to solar tracker wind-design, based on accurate wind-loading analysis. Dy-WIND is a combination of DAF (Dynamic Amplification Factors) + FAM (Fluttering Analysis Method) + BAM (Buffeting Analysis Method) as a new standard in tracker multi-array design analysis. The Dy-WIND system counts on several implementations to make it resistant to high winds. These dynamic considerations significantly increase loads perceived by the tracker, compared to the previous standard static scenario. There are several wind-stow strategies technically viable for single axis tracking technologies. However, it is necessary to evaluate the wind loads, the topography and the dimensions of the trackers to determine the most suitable for a specific project, as not all of them would be feasible. The traditional zero degree strategy is safe, yet the data collected from Soltec’s tests recommends a 45 degree stow strategy as being more suitable for current market trends, notably large-area modules of 72-cell configurations and above with weights in the 30kg range.

Applications

In order to fully study the wind effects on the tracker structure, several phenomena such as wind fluctuation and turbulence must be considered. The fluctuation portion of wind loads is due to wind turbulence and the dynamic response of the structure. The inertial loads due to resonant vibration can add significantly to the fluctuating wind loads. This system helps to give the stability needed to a tracker deployed PV power plant installed at an extreme location or exposed to high winds.

Platform

The Dy-WIND design counts on robust piles and robust mounting rails for modules. The system contains a reinforced slewing drive with specialized features and stronger torque-tubes to improve stiffness. The section coupler assembly increases tube stiffness with optimized specifications for material, cross-section and fastening. The rotation Bushings on simple piles regulate torque-tube frictional stress, making for a more rigid structure against torsion. Soltec has incorporated Dy-WIND in the design of its tracker systems, such as the SF7 and SF7 Tandem single-axis trackers. 

Availability

Currently available. 

PV Tech is hosting a TechTalk Product Series webinar with Soltec and RWDI to provide further insight into the design requirements of utility-scale PV power plants deploying tracker systems in the new-era of large-area utility-scale PV panels and the impact on systems experiencing high-wind loads.

Title: Eliminating catastrophic PV tracker system damage due to extreme wind conditions

Thursday, July 30th, 2020 – 4:00 PM (BST)

More information and free registration can be found here.

Read Next

May 17, 2022
A total of 122 modules types from 25 manufacturers have been named as “Top Performers” by PV Evolution Labs (PVEL) in its 2022 Module Reliability Scorecard, with some ‘best ever results’ in certain categories and more powerful modules being offset by poor performance in others areas.
May 11, 2022
Canadian module manufacturer Heliene has seen unprecedented demand for its modules following the US Department of Commerce’s (DOC) decision to investigate alleged anti-dumping and circumvention (AD/CVD) by solar manufacturers in Thailand, Vietnam, Malaysia and Cambodia, which continues to spread chaos across the US solar sector.
May 6, 2022
Tata Power Solar has landed what it claims to be India’s largest single solar EPC order of 1GW for roughly INR5500 crore (US$715 million) from Indian state-owned utility SJVN Ltd.
May 2, 2022
US thin-film manufacturer First Solar recorded a US$43.3 million loss in its Q1 2022 mostly caused by a drop in sales, with the company expecting a “challenging 2022 from an earning standpoint” given ongoing supply chain constraints.
April 26, 2022
Independent power producer (IPP) Fu-Gen has secured €320 million (US$342 million) in financing for renewables, battery storage and green hydrogen projects across Europe.
April 26, 2022
Investment fund Quinbrook Infrastructure Partners and its subsidiary Primergy Solar have closed a US$1.9 billion financing deal for a 690MWac/380MW hybrid solar-plus-storage project in the US.

Subscribe to Newsletter

Upcoming Events

Solar Media Events
June 14, 2022
Napa, USA
Solar Media Events
October 4, 2022
New York, USA