Real-time monitoring of solar photovoltaic systems...

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  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 1

    Real-time monitoring of solar photovoltaic

    systems, integrated with energy meteorology

    Andr NOBRE, Mark KUBIS, Thomas REINDL

    Solar Energy Research Institute of Singapore (SERIS)

    NI Week Energy Technology Summit, National Instruments

    8 August 2012

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 2

    Presentation outline

    About SERIS

    Solar photovoltaics (PV) systems research

    Research project on irradiance forecast

    Research project on PV system performance analysis

    Demo

    System conceptualization and design

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 3

    SERIS Solar Energy Research Institute of Singapore

    Founded in 2008; focuses on

    applied solar energy research

    Part of the National University

    of Singapore (NUS)

    Rapid growth (now > 150 staff

    and > 6000 m2 of space)

    > USD 30 million investment

    into laboratories

    Focuses on PV R&D (cells,

    modules, systems)

    Two R&D pilot lines: Si wafer

    solar cells, Si thin-film solar

    cells in class 10,000 cleanroom

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 4

    To make solar power a cost-effective

    and trusted source of electricity in

    South-East Asia through:

    Increasing availability through

    designing high-performing solar

    systems (locations, components,

    layout)

    Increasing reliability through close

    monitoring and remote controlling of

    solar power systems

    Increasing predictability through

    forecasting irradiance and solar

    power generation several hours in

    advance

    Impression of MW-scale

    PV system

    Mission and R&D goals Solar Energy Systems Cluster

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 5

    PV systems operation Challenges of tropical locations

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 6

    REAL TIME

    Solar PV systems research Holistic approach for PV electricity generation

    INPUTS

    Meteorological parameters

    PV generated electricity

    OUTPUTS

    Irradiance forecasts

    PV electricity generation

    forecasts

    Meteorological & PV systems

    monitoring stations Development of forecasts &

    now-casts algorithms

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 7

    Inputs $1.3M irradiance forecast research

    5x5 km spatially resolved irradiance network

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 8

    30 systems @14 sites (~20% of the installed PV capacity in Singapore)

    Inputs $1.3M PV systems monitoring research project

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 9

    cRIO-9073/4/5 controllers

    C-series modules for analogue

    and RTD readings

    3G router, with live

    transmission of data (to SERIS

    PV Systems Monitoring

    Laboratory)

    Automatic daily data download

    routines

    Time synchronization with time

    server (150 ms)

    Inputs Meteorological stations & PV systems monitoring stations

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 10

    Inputs Example of SERIS remote meteorological & PV systems

    monitoring stations

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 11

    Inputs Hardware selection importance of NI robustness in the tropics

    60 C

    30 C

    To-date: >99.7% data availability from SERIS

    multiple monitoring stations

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 12

    Outputs Goals and expected outcome of research projects

    Irradiance forecasting model in several time horizons

    Spatially resolved, island-wide PV power output forecast model

    Automated software for fault detection of PV systems

    Visualization software for user & service/utility levels

    Increase solar

    electricity predictability

    Enhance total PV

    system reliability

    Thus reducing solar

    electricity cost

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 13

    Demo

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 14

    Distribution of stations in each quadrant

    Assignment of station IDs according to

    software implementation

    Division of island into quadrants of 5x5 km

    System conceptualization and design Preparation of system design

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 15

    System conceptualization and design System overview

    Central Monitoring Station (CMS) Remote Monitoring Stations

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 16

    System conceptualization and design Central Monitoring Stations (CMS) Administrative services

    Remote stations status summary

    Current remote stations IP

    addresses lookup table

    Remote diagnostic utilities

    Upload/download data tables to

    the NSR* database

    Alarms, e-mails, SMS *NSR: National Solar Repository of

    Singapore (www.solar-repository.sg)

    http://www.solar-repository.sg/http://www.solar-repository.sg/http://www.solar-repository.sg/

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 17

    System conceptualization and design Central Monitoring Stations (CMS) User services

    Remote stations fast data server

    Weather data with statistics and

    graphs

    Daily, monthly, yearly, archived

    data in Excel format

    Long term historical data with

    display and processing software

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 18

    System conceptualization and design Data communication with remote stations

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 19

    Central Monitoring Station (CMS) Main software modules

    Remote station configuration

    database

    Auto download scheduler and

    remote stations status

    TCP server heartbeat and slow

    data receiver

    Message management and re-

    direction

    Slow data processing and

    logging

    Automatic data downloader

    Remote control and diagnostic

    Data verification & limits testing

    Database interface

    Fast data processing

    Alarms dispatch

    SNTP time client

    Local and remote errors handler

    SNTP time server

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 20

    Communications flow Types of interaction between remote and central monitoring stations

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 21

    Remote monitoring stations Main software modules

    Data acquisition

    Data logging

    Remote control

    Heartbeat transmission

    Time synchronization

    System monitoring &

    watchdog

    FTP file transfer

    Fast data sender

    (DataSocket)

    Slow data sender

    (TCP)

    Smart data buffering and

    auto download

    Error logging and

    reporting

    System events logging

    National Instruments - CompactRIO Embedded Controller

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 22

    Remote monitoring stations LabVIEW block diagram

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 23

    Time synchronization

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 24

    Memory and disk usage One month record

    Dis

    k F

    ree [M

    B]

    Time

    Me

    mo

    ry F

    ree

    [MB

    ]

  • SERIS is a research institute at the National University of Singapore (NUS). SERIS is sponsored by the National University of

    Singapore (NUS) and Singapores National Research Foundation (NRF) through the Singapore Economic Development Board (EDB). 25

    Thank you for your attention!

    Andr NOBRE [email protected]

    Mark KUBIS [email protected]

    More information

    www.seris.sg

    mailto:[email protected]:[email protected]