folgat solar telecom applications

7/29/2019 Folgat Solar Telecom Applications

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- Telecom Applications -

Solar Power Supplies for

Telecom Applications

FOLGAT AG Frankfurt am Main Germany


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As mobile network expansion moves ostensibly to emerging markets where solar

energy levels are more favorable, solar power appears ready to play an important role

in reducing the costs of cellular service delivery and ensuring a more reliable power

supply. The OEMs drive toward reducing base station power consumption, along withimprovements in photovoltaic cells, have meant that solar energy is now a very viable

solution for powering cellular base stations.

335,000 Cellular Base Stations to Include Solar Power by 2013

Mobile networks go green

ABI Research Company , USA / Mobile Networks Research Report

www.abiresearch.com

Solar power will first be used in conjunction with other primary energy sources such as

diesel or grid-based electricity, but will increasingly be seen as a primary source for

autonomous cell sites. The market for autonomous solar powered cell sites looks set to

grow from extremely modest levels today to over 40,000 renewable energy sites by theend of 2013. A further 295,000 base stations are expected to supplement on-grid

power usage with solar.

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Utility Grid

Diesel GenSet

Solar Power Supply

Hybrid System: Solar / Wind

Hybrid System: Solar / Wind / GenSetHybrid: Utility Grid / GenSet

Hybrid: Utility Grid / Back-up Batteries

A short review about Power Supplies forTelecom Applications

Basically there are the following possibilities to supply energy to BTS (Basic

Telecommunication Stations) in remote areas:

The most economic possibility is to use renewable energy systems or

combined systems. Here we would like to introduce solar energy systems as

a reliable and cost efficient solution.

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The most disadvantages of Diesel Aggregates are:

Dependence of fuel (world-wide increase of oil prices; limited resources

in future)

Transport to the sites (long distances and cost intensive transports) Storage of the fuel at site (safety problems - explosions, vandalism, etc.)

No unintended operation is possible (high personal cost)

High maintenance cost (oil, filters, etc.)

Limited life-time of Diesel motors (change of motors every two years) Pollution (noise, heat and dirt)

The most advantages of Solar Systems are:

Independence of oil, gas and utility gridMost economic operation (very low running costs)

Unintended operation (normally no operation personal is required)

Long lifetime (only the batteries must be changed every 5 8 years)

No pollution, no noise, no dirt

Comparison of Solar and Diesel power supply for BTS

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Solar Powered BTS in remote areas

Front viewTotal view

The Kingdom of Saudi Arabia

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All system is inside the

bunker

Photovoltaic systems of high-level security

Also Installations of container type

(in 20-foot containers)

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Battery blocks with inter-connectors and recombination devices theyare necessary, of course, only for flooded battery types like OPzS

Applied Solar Batteries

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Charge-Discharge-Controller / up to 16 kW (240A; 48V)

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Charge-Discharge-Controller / up to 16 kW (240A; 48V)

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SUW 200 can be used in solarapplications to convert DC powerfrom solar modules or AC power fromgen-set into 48VDC. The basic task ofthe SUW 200 power supply system isto supply main telecom equipment(telecom exchanges, GSM base etc.)

with Uninterruptible DC power.

Selectiva PLUS 4080 48V / 80A

Selectiva PLUS 4120 48V / 120A

Rectifier Devices

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Monitoring and Data Transfer System

Remote

Site BTS

Remote

Site BTS

Remote

Site BTS

Remote

Site BTS

1

.. 2000

OfficeComputer

withModem

Internal Network

Server

Handy

DC power supply system and inverter system,

generating set, solar, battery etc.air conditioner,

DC and AC distribution board,

UPS (Uninterruptible Power System),

fire protection system,

others

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Load current and Ampere-Hour

Battery current and Ampere-Hour (calculated)

Array current and Ampere-Hour

Battery Voltage

Shelter temperature

Ambient temperature

Fire alarm status

Battery High Voltage Alarm

Battery Low Voltage Alarm

Water Level Alarm

Door Open Alarm

Solar Insulation Level

Typical parameters which can be monitored are the following:


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2 inputs for Ah counting for Load and Array. The battery Ah will be calculated.

5 alarm digital inputs (high voltage, low voltage, fire alarm status, water level

status, intruder alarm), 4 analog inputs (battery voltage, load current, array current, solar insolation),

2 inputs for temperature measurement.

+ Measurements once a minute:

local data collecting of 4 analog (15 min averages from minutesmeasurements), 5 digital quantities, 2 temperatures and 2 Ah counters. (4 datapackets for 1 hour = 96 data packets per day) near 56 KB local memory for onemonth data collection,

local connection and data transfer through RS232,

data transfer once a day (after 0:00AM - all data packets from day before), alarm signals transmission after its appearance.

Remote communication over GSM network CSD or GPRS (with static addressesnecessary).

Controller specification


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Economical consideration of DIESEL- and SOLAR poweredtelecom-plants

0

10

20

30

40

50

6070

80

90

100

0 20 40 60 80 100

Solar Power

Diesel Power

break-even pointbelow 20 USD cent

Relative values for annual operating costs

Costs for DIESEL fuel in USD cent

Assumptions: Interest rate = 6 % ; Lifetime of systems = 20 years ; operation in areas with high solar

irradiations (sunbelt ofearth) ; price increase of DIESEL fuel = 5% per anno;

Even below 20 USD cents for fuel a SOLAR powered system operates more economic

than DIESEL powered stations!

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Providing with solar cells, solar modules, solar inverters

Planning/Consulting

Outsource design and installation works

Monitoring

Service

FOLGAT AG is a provider of solutions and products (solar cells, solar

inverters, modules, systems) for the photovoltaic electricity generation. We

intensively collaborate with the numerous companies along the entire value

chain of PV products at regional, national, European and International level.

FOLGAT AG / Solar strategy

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Business focus


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FOLGAT AG

Melsunger Str. 9, D-60389,Frankfurt am Main, Germany

tel.: 49 69 95297164

fax: 49 69 95297165

[email protected]

CONTACTS

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