The Chorus Line - Chorus Line Presentation...Doc. number 61:00-1 Rev. 5 September 2006 1 The Chorus...

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Transcript of The Chorus Line - Chorus Line Presentation...Doc. number 61:00-1 Rev. 5 September 2006 1 The Chorus...

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    The Chorus Line Reliable Wind Power Control

    The Chorus Line, managed by its ChorusDIRECTOR application software, puts your wind turbines in perfect tune.

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    Quest Introduction

    Quest AB Your Partner Since the start in 1983, Quest has built up a wealth of practical experience in the field of wind power control. This ever-growing experience is used to the benefit of the wind power industry, thus making Quest an ideal partner for development of control technology. Strategy for Success In order to be successful we follow certain key strategies:

    Close partnership with windmill manufacturers

    Use of industrial standard products

    Open software

    Modular system

    Cost-effective development

    Per Stjerneman, Managing Director

    Co-development with the Manufacturers The Chorus system is developed in close association with our partners, the windmill manufacturers. Our partners demands have formed a controller well suited for modern wind turbines. Use of Industrial Standard Products Our customers requirements that the system should employ standard products, resulted in our choice to use standardised industrial bus systems (including Ethernet and CAN), wireless local communication (Bluetooth) and cost-effective man-machine interface (PDAs). Open Software Functionality Quest has drawn on many years of experience when designing the control software. This know-how is now available to our partners through the open software.

    This means that our partners have access to the wind turbine functionality and to various toolboxes included. Hence, our customers have the freedom to create their own specific software solutions and keep them confidential. Modular System It is essential that the development time for partner projects is kept as short as possible. In order to achieve this, the control systems hardware and software have been made highly modular. This makes future development or modifications fast, efficient and secure. Cost-Effective Quest has been working in the field of control systems for many years. This accumulated know-how is a key ingredient when developing cost effective solutions for the wind power industry.

    Quest Your development partner!

    Gteborg, September 2006

    Per Stjerneman

    Quest Energy Control AB SE-421 66 V.Frlunda, Sweden Tel: +46 31 510010 E-mail: Web:

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    Product Family & Central Controller

    The Chorus Line Quests Product Family Our family of control system products is called The Chorus Line.

    The family includes the following hardware:

    ChorusCPU Central controller ChorusTRAFO Voltage transformer ChorusIGNIT Thyristor driver and the associated software:

    ChorusOS Operating system ChorusDIRECTOR Application software

    The Chorus Line is designed in such a compact way that these core products, together with a few complementary standard products, form the entire control system that your wind turbines need. ChorusCPU Highlights

    High accuracy in measurements

    Proven high reliability

    I/O via standard industrial bus systems

    Easy and quick configuration

    Cost effective product

    Communication The Chorus system features three high speed buses: The Ethernet and two CAN buses. The first CAN-bus is normally used to communicate with the distributed standard industrial I/O modules around the wind turbine, while the second one can be used to communicate with e.g. inverters, a vibration monitoring system or the generator. Additionally, there are two RS-232 ports and two RS-485 ports for e.g. user interface. Software Download The product software may easily be updated via a download procedure. Security Loop In order to achieve a high security in a wind power plant consisting of several different intelligent systems, Chorus includes a specific security feature monitoring an external loop (with e.g. stop buttons). It also offers two security outputs that can block external equipment in case of an emergency. Moreover, it is self supervising.


    Inputs/Outputs On-

    board Max.


    Digital IN 24 512

    Digital OUT 16 512

    Analog IN 9 64

    PWM OUT 6 64

    Communication Number Speed

    Ethernet T-base 1 10/100 Mbit/s

    RS-232 2 115.2 kbit/s

    RS-485 2 115.2 kbit/s

    CAN-bus 2 500 kbit/s

    General Data

    Description Data Remarks

    Power requirements 24V DC, 3A 18 32V

    Processor type 50 MIPS RISC Motorola MPC 555

    Flash memory 8 MB


    RAM 2 MB

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    Hardware Modules

    Chorus Voltage Transformer The voltage and current measurements are used to calculate energy production, blind power and to synchronise the connection to the grid.

    Quests strategy is to separate all grid voltage devices from the controller and to use a standard properly scaled voltage input signal. Chorus uses external voltage trafos for the nominal grid voltage 690/400/230V and to obtain 110V signals from high voltage equipment.


    Description Data

    Name ChorusTRAFO

    Type Single phase type

    Max Voltage 690V

    Accuracy 0.3 %

    Output 0 10V

    Industrial Standard Modules When expanding the standard Chorus configuration, it is easy to plug in standardised industrial I/O modules from different vendors which all connect to the CAN-bus. The amount of cabling is greatly reduced by distributing the I/O units around the mill.

    A bus terminal and some I/O modules

    Thyristor Driver Module Thyristors are controlled by the external driver module named ChorusIGNIT. It is typically installed close to the thyristors and communicates with the ChorusCPU module through a bus cable.


    Description Data

    Name ChorusIGNIT

    Thyristor outputs 6

    Output voltage, max 690V

    Output current, max 1A

    Over-current protection Yes

    Digital inputs 6

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    User Interface

    Handheld User Interface + Bluetooth Chorus employs standardised hardware products also for the user interface, for example a small handheld PDA. This terminal connects to the control system via Bluetooth wireless communication The customer benefits are obvious:

    Service personnel keep and manage their individual terminal.

    The personnel may for example sit in a car outside the mill monitoring the operation or updating parameters.

    When working in e.g. the nacelle he may operate the plant remotely. Hence, there is no need for a second person assisting at the central control system downstairs.

    The total investment cost is reduced since there is only need for a couple of handheld terminals in an entire wind park consisting of several hundred machines.

    Fixed Graphical Terminal The Chorus user interface may also include a fixed graphic terminal with touch screen used for demonstrations or when needed in the wind turbine.

    Central Monitoring System Since the protocol and the software are open the manufacturer can incorporate the mills in the end-customers central monitoring system.

    User interface through a handheld PDA

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    ChorusOS The Real-Time Operating System This is the software platform on which the application is based. Its a true real time system designed for the very fast processes involved in electrical energy systems. The OS provides a large number of dedicated resources for application programmers. ChorusDIRECTOR Application Software

    Open source code

    Object oriented and written in C++

    Facilitates communication within wind farms

    Ability to communicate and use standardised industrial bus systems

    Easy and quick expansion Open Source Code for Applications Occasionally, the extensive set of parameters in the application is not sufficient to fine-tune the operation. Therefore all major applications of the wind turbine are fully open to our partners