The World's #1 Renewable Energy Network for News, Information, and Companies.
Untitled Document

Case Study: Using OPC Software To Operate Wind Farms in Spain

Wind power is increasingly becoming an established source of energy. High oil prices, global warming concerns and the nuclear disaster in Fukushima have all contributed to more people looking at renewable energy sources such as wind power. Germany, for example, has decided to gradually phase-out nuclear power by 2022. Wind power will be the backbone of this energy transition — by the year 2050 it should cover about half of German electricity.

The energy transition in Germany shows that the successful integration of renewable energy into utility portfolios is increasing. Still, owners and operators of wind farms face many business challenges: optimizing operations, effective maintenance and increasing the accuracy and timeliness of decisions all affect the bottom line. Other critical issues include utility integration, accurate data analysis as well as forecasting and scheduling energy output. All these business aspects require reliable real time data for making effective decisions.

Guaranteed Data Delivery Required

Such issues are illustrated by those encountered at a wind farm in Spain, operated by a major energy company.

The energy company, which has 650,000 power distribution/retail customers, faced the challenge of providing centralized data access to three remote wind farms in Spain. The wind farms contain turbines and control systems from different vendors with varying, low bandwidth communication mediums. In order to have access to real-time information for equipment monitoring as well as making production decisions, the energy company needed guaranteed data delivery for its wind farms.

To do this, the company needed to establish bidirectional communications between three wind parks with approximately 26 megawatts per park and a control and a dispatch center (both located in Madrid). In addition, the company required: real time and historical data collection for periodical reports to its headquarters in Germany, technical diagnostic and real time supervision, centralized information for every project manager, manufacturer warranty, and outsourcing maintenance supervision. 

Open Connectivity with OPC

The energy company decided to use OPC, which is a series of open standard specifications for control automation data connectivity. OPC can be deployed to communicate between devices, controllers, and/or applications without getting caught up in the usual custom driver-based connectivity problems.

The most widely used variations of the classic OPC standard are: OPC Data Access (OPC DA) to move real-time data between control devices to HMIs, historians, and other display clients; OPC Historical Data Access (OPC HDA) to provide a standard way to share historical data; and OPC Alarms & Events (OPC A&E) for the transmission of alarms and events. These OPC specifications rely on Microsoft Windows' binary communication services implemented in the Component Object Model (COM) and Distributed Component Object Model (DCOM) which enable Windows applications to share data locally or remotely respectively. Thanks to this, all control systems, machine interfaces, automation applications etc, which run on a Windows platform, can easily take advantage of the data sharing offered by OPC Classic.

In order to deliver vendor-independent communications, OPC abstracts the Data Source (such as a PLC), Data Sink (such as a HMI) and implementation details from each side so data can be exchanged between the data source and the data consumer without requiring them to know anything about each other's native communications protocol and internal data organization. This is in contrast to the custom driver approach of writing applications that, by definition, must natively communicate between each other.

The ability to flexibly choose any SCADA, Historian or analysis tool on the market is set to be a key consideration as wind parks grow and technology evolves.

Implementation: Challenges and Solutions

While implementing its OPC solutions, various technical challenges had to be addressed on behalf of the energy operator, both in the wind farms and the control center.

One main challenge for almost every wind park operator is the connectivity with different control systems; in this case three different controllers from two different providers were involved. OPC allowed seamless communications to be established to all of them and all necessary data collected.

The data coming from the turbines in the Spanish wind farms, however, were quite basic, such as generated electricity or the pitch angle of the wind turbine blades. To give the energy company more insightful information, a tailored solution was devised, combining a proprietary Data Calculator with a ‘funnel’ system.

The Data Calculator is an OPC tool designed to combine any number of real time OPC inputs, condition them, and generate create real time OPC outputs, while the Funnel collects all process data from the wind farms into a single gateway. This way, the OPC Data Calculator only had to make one simple connection (to Funnel) to access data from all the data sources. The Data Calculator can then turn raw data into information: for example, by combining generated energy with the mechanical stress a turbine is exposed to provide data that shows how efficiently the wind turbine is working.

Data Transmission from Wind Farm to Historian 

In order to be able to analyze the collected real-time data for the long term, it was important for the energy company to store the information in a data archiving tool. For that, rather than a centralized data historian, OPC Desktop Historians were used at each wind farm. This technology, a lightweight Historian solution that provides efficient high speed data archiving, was installed, configured, and administered at each wind farm, allowing engineers access to all required information locally.

This solution was augmented by the addition of a system used to automatically transmit archived data at each wind farm to the centralized data historian in the control center. Called Historylink, it uses OPC HDA to perform the transfer from data source to destination while ensuring that no data is lost. While wind farms sometimes generate and capture large amounts of local data, they often operate in low bandwidth network environments, which make it difficult to move the data to a centralized location. Historylink allowed the energy company, where required, to select the most critical data for transfer to the central data historian. To avoid security and DCOM issues, a reliable data delivery mechanism was added to ensure secure transmission paths from the wind parks.

Results 

Confronted by problems such as multiple locations, proprietary components from multiple vendors, and the necessity for reliable communication channels over unreliable network environments, the energy company had found data consolidation from its different wind farms highly challenging.

In partnering with experts dedicated to provide a vendor-neutral solution, OPC could be implemented as a corporate standard for communication. Thanks to this, the energy company achieved a scalable and robust architecture based on an open standard which enables the creation of a vendor neutral hardware and software architecture. As a result, the connectivity between the remote wind farms and the control center allowed for reliable data transition and reduced project costs.

Lead image: Wind turbines via Shutterstock

Untitled Document

RELATED ARTICLES

U.S. Offshore Wind Power Industry Starting to Emerge

Ehren Goossens, Bloomberg A few miles off the coast of Block Island, a new U.S. industry is emerging from the Atlantic Ocean. That’s where Deepwater Wind LLC is installing a massive steel frame, more than 1,500 tons, that sits on the seabed and juts...

100-MW Kenyan Wind Farm Will Help Power Africa

Renewable Energy World Editors As part of President Obama’s Power Africa initiative, the Overseas Private Investment Corporation (OPIC), the U.S. Government’s development finance institution, announced that it committed $233 million in debt financing to ...

Regional News from the July/August 2015 Digital Edition of Renewable Energy World

Renewable Energy World Editors EcoFasten Solar announced that it launched a new mounting "Rock-It System" that it would be displaying during Intersolar. Product compliance was determined through testing per UL Subject 2703, which reviews integr...

With 1.6 GW of Wind Capacity Installed in Q2, American Wind Power Continues To Ramp Up in 2015

David Ward, American Wind Energy Association With 1,661 megawatts (MW) of newly installed wind turbines coming online during the second quarter of 2015 and more than 13,600 MW under construction, American wind power continues to increase its contribution to the U.S. e...
Darek Kominek: B.Sc. Eng. CompE, P.Eng. (Alberta, Canada), is an OPC Subject Matter Expert at MatrikonOPC. Darek launched the successful MatrikonOPC Integrator Partner Program that works with third party System Integrators to help them leverage OP...

CURRENT MAGAZINE ISSUE

Volume 18, Issue 4
1507REW_C11

STAY CONNECTED

To register for our free
e-Newsletters, subscribe today:

SOCIAL ACTIVITY

Tweet the Editors! @megcichon @jennrunyon

FEATURED PARTNERS



EVENTS

Doing Business in South Africa – in partnership with GWEC, the Glob...

Wind Energy in South Africa has been expanding dramatically, growing fro...

StartUp Green

AREI, American Renewable Energy Institute, in partnership with ...

AWEA Offshore WINDPOWER 2015 Conference & Exhibition

Building Up and Trending Forward With the construction of the Block Isla...

COMPANY BLOGS

Clean Energy Patents Maintain High Levels in First Quarter, Solar L...

U.S. patents for Clean Energy technologies from the first quarter of 201...

Fact Check: AWEA represents American wind power

The American Wind Energy Association (AWEA) is proud of its members for ...

Koch Professor drops his Koch title, still makes same errors plus s...

The Koch Professor’s title isn’t the only thing that’s...

NEWSLETTERS

Renewable Energy: Subscribe Now

Solar Energy: Subscribe Now

Wind Energy: Subscribe Now

Geothermal Energy: Subscribe Now

Bioenergy: Subscribe Now  

 

FEATURED PARTNERS