Transcript Chapter 14 — Commissioning, Maintenance, and

PowerPoint® Presentation
Photovoltaic Systems
Commissioning, Maintenance, and
Troubleshooting
Commissioning • Maintenance •
Monitoring • Troubleshooting
Arizona Solar Power Society
www.meetup.com/arizona-solar-power-society/
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
A commissioning
checklist should be
reviewed before the initial
startup of any PV
system.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
A general start-up procedure begins at the array and
ends at the loads, though exact procedures may
differ.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
A detailed walkthrough
allows the installer to
explain the basic
operation of the PV
system and the
maintenance
requirements to the
owner.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
Visual module
inspections involve
checking for damage
from physical impacts,
delamination, burned
internal connections, and
other problems.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
Corroded grounding
connections usually
result from the contact of
incompatible materials or
extreme environments.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
Periodic shading control
involves trimming
vegetation and cleaning
a soiled array.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
Damp leaf debris
trapped under arrays
can cause mold and
mildew problems.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
Cracked or deteriorated
weather sealing around
attachment-point
penetrations can quickly
develop water leaks.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
Battery enclosures
should be inspected for
strength, cleanliness, and
adequate ventilation.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
Battery terminals are
particularly susceptible
to corrosion and may
require frequent
cleaning.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
Battery maintenance
includes checking for an
adequate level of
electrolyte.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
Battery watering replaces
water lost from gassing
during charging.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
Battery state of charge
can be related to both
specific gravity and
voltage.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
Either one of two types of
hydrometers can be used
to measure the specific
gravity of battery
electrolyte.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
When viewing through a
refractive index
hydrometer, the specific
gravity of the tested fluid
is measured against a
calibrated scale.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
An infrared (IR)
thermometer can
measure the temperature
of electrical equipment,
including PV system
components.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
A maintenance plan
includes all the
necessary maintenance
tasks and their respective
schedules.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
The three most important
points for measuring
voltage and current
information are the array
output circuit, inverter
output circuit, and charge
controller circuit (if
applicable).
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
Sensors for measuring
irradiance and other
parameters allow
technicians to correlate
PV system output with
weather conditions.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
Equipment status
indicators may have
multiple functions.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
Data-acquisition systems
gather, record, and
process information from
many sources that can
be used to observe
trends or problems in PV
system operation.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
The system level
includes all the
components of a PV
system.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
PV subsystems are
divided by the
components involved in
energy production,
storage, processing or
conditioning, distribution,
and consumption.
Chapter 14 — Commissioning,
Maintenance, and Troubleshooting
Most equipment manuals
include troubleshooting
flow charts or
procedures, which
narrow the possible
causes of a problem by
following a specific set of
instructions.