siemens - how to exploit sunlight toward maximum energy yield?

7/27/2019 Siemens - How to exploit sunlight toward maximum energy yield?

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Answers for industry.

How to exploit sunlight towardmaximum energy yield?

Siemens solar tracking control is the universal solution

to maximize the suns power from PV and CSP to CPV.


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The universal solutionfor solar tracking applications ...

A solar tracking system controls double

axis movements azimuth and zenith

of Photovoltaic (PV) and Concentrated

Solar Power (CSP) Plants. The panels

or mirrors are pointed directly towards

the suns radiation in order to maximize

exploitation of the sunlight and to

ensure exact alignment of the receiver

and the angle of the sun. Thanks to

Photovoltaic Parabolic trough Linear Fresnel

these movements, the tracker system

contributes to an increase of electricity

production by more than 30% in cell-

and thin film-based technologies. For

Concentrated Photovoltaic (CPV) and

CSP a precise tracking control system

is the unconditional prerequisite for

the production of stable and efficient

electrical power.

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Modular groups of primary products

SIMATIC S7-1200 controller Gear drives Communication

The new dimension in compact

automation

The compact controller

SIMATIC S7-1200

SIMATIC HMI with integrated

engineering system SIMATIC STEP 7

Basic

High flexibility for smart solutions

with scalable hardware

Fast engineering for programming

and commissioning

Accurate positioning thanks to

64-bit resolution

Tested with Siemens gear drives

for solar tracking

Cycle testing

Long-term precision

Save position

References position

Tested with different motors

System recovery

Simple networking between

engineering, HMI panels and

controllers with all tracking units

SIMATIC S7-1200 supports TCP/IP

native, ISO on TCP, as well as

SIMATIC S7 communication

SCALANCE is the wide-range Ethernet

network for field applications

Remote control interface/access

Easy integration into a DCS system

of the power plant, e.g. SIMATIC PCS 7

Extendable during field operation

Networking of mixed power plants

Controls Gear drives Communication

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Universal solar tracking con

Ethernet ControEthernet Control & referencing

DC motor

Reference switchCPU 1214C

M

M

CPU 1214C

Solar

Position

Algorithm

(SPA)

Positioning

Control

Azimuth

Po

C

A

Positioning

Control

Zenith

Po

C

Z

Control Center Control Center

L1

L2

L3

L1

N

Power supply

24V DC SIRIUS 3RF2

Longitude

Latitude

UTC

Pressure

Temperature

Elevation

Atmospheric

refraction

PWM + Control

Pulses

NTP

Control

Status

Central station

DC motor

DC motorPWM + Control

Pulses

Longitude

Latitude

UTC

Pressure

Temperature

Elevation

Atmospheric

refraction

Solar

Position

Algorithm

(SPA)

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l based on SIMATIC S7-1200

ing

Induction

motor

Reference switch

Ethernet Control & referencing

Induction

motor

Reference switchCPU 1214C

M

M

M

M

Positioning

Control

Azimuth

Positioning

Control

Zenith

Control Center

Induction motor

L1

N

SINAMICS

G110

Central station Central station

NTP

Control

Status

Pulses

Induction motor

DO fwd

DO rev

DO fwd

DO rev

Pulses

Induction motor

Induction motor

NTP

Control

Status

Pulses

DO f1

DO f2

DO dir

Pulses

DO f1DO f2

DO dir

Longitude

Latitude

UTC

Pressure

Temperature

Elevation

Atmospheric

refraction

Solar

Position

Algorithm

(SPA)

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CPV solar tracker control software

Highlights

Universal tool for all solar

applications

Open system for different motors

Minimal energy consumption

Secured control principles

Features

Manual mode

Jog mode (forward, reverse)

Teach mode

Synchronize azimuth and zenith

position with the solar vector

Teaching reference point switch

Auto mode

Follow the sun

Auto referencing during night time

Move to stow position in case of an

emergency

Move to safe position after sunset

Applications

Scalable tracking for small, medium

and large-scale power plants

Integrated into the plant-wide control

system

Complete solution for ramp up,

recovery, operation, services,

maintenance

Reaction to critical weather conditions

Cockpit steering Single-unit application Field-wide application

% DB101

SPA_Calc_SunVector_DB

SPA_DATA.Atmos_Reflect Atmos_Reflect ENO

SPA_DATA.ZenithZenith

SPA_DATA.AzimuthAzimuth

SPA_DATA.Delta_t Delta_t

SPA_DATA.Elevation Elevation

SPA_DATA.Temperature Temperature

SPA_DATA.Pressure Pressure

SPA_DATA.Latitude Latitude

SPA_DATA.Longitude Longitude

EN

% FB101


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Solar Vector

Actual Azimuth position

E

N

Actual Zenith position

% DB101


SPA_DATA.Atmos_Reflect Atmos_Reflect ENO

SPA_DATA.ZenithZenith

SPA_DATA.

AzimuthAzimuth

SPA_DATA.Delta_t Delta_t

SPA_DATA.Elevation Elevation

SPA_DATA.Temperature Temperature

SPA_DATA.Pressure Pressure

SPA_DATA.Latitude Latitude

SPA_DATA.Longitude Longitude

EN

% FB101


... from Siemens.

The universal tracking control system

by Siemens fits each application in

solar from low-end PV single-axis

movements to high-end CPV double-

axis movements.

Each single-unit solar tracker

is perfectly controlled by a

SIMATIC S7-1200 controller.

The precise adjustment of azimuth

and zenith axes occurs based on the

astronomical algorithm with 64-bit

arithmetic accuracy which precisely

secures the requirements of even CPVsystems.

The central PC-based HMI allows to

monitor and control the actual status

of each solar tracker unit via

Ethernet connection.

The Solar Positioning Algorithm used in

the Siemens tracking control software is

based on SPA software developed by the

National Renewable Energy Laboratory,

NREL, for the U.S. Department of Energy,

DOE1).

This algorithm is specified with leading

edge accuracy of +/ 0.0003. This allows

an accuracy of better than +/ 0.05

including mechanical tolerances if high

precision gears from Siemens are used.

Dish engine Power tower Concentrated photovoltaic

1) Neither NREL nor the DOE endorse SIMATIC.

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Get more information

[email protected]

www.siemens.com/solar-industry

Subject to change without prior noticeOrder No.: E20001-A100-T112-V1-7600DISPO 27903W/23782 GC.CC.Y93.SOL.52.0.03 WS 12092.0Printed in Germany Siemens AG 2009

Siemens AGIndustry SectorSolarSiemensallee 8476187 KARLSRUHEGERMANY

The information provided in this brochure containsmerely general descriptions or characteristics ofperformance which in actual case of use do not alwaysapply as described or which may change as a result offurther development of the products. An obligation toprovide the respective characteristics shall only exist ifexpressly agreed in the terms of contract.

All product designations may be trademarks or productnames of Siemens AG or supplier companies whose use

by third parties for their own purposes could violate therights of the owners.

siemens - how to exploit sunlight toward maximum energy yield?

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