The intelligent component technology of intelligent transformer
reflects the intelligence level of intelligent transformer, which is
composed of various intelligent electronic devices such as acquisition,
measurement, measurement, monitoring, and control. At present, smart
substations are mainly realized in two forms. One is a transformed smart
substation, where online monitoring is configured near the primary
equipment, that is, on-site, and most of the protection is placed in the
relay room; the other is a newly built smart substation. , the
transformer online monitoring unit and transformer body protection are
arranged locally in the transformer intelligent control cabinet.
Intelligent transformers are developing in the direction of energy
saving, environmental protection, intelligence and integration.
On-site
digitization of measurement, networked control functions, visualization
of status evaluation, and automation of information interaction are the
main manifestations of intelligent transformer intelligence. The
specific manifestations are as follows: oil level, oil temperature, tap
changer position and other parameters related to operation control are
realized. On-site digital measurement is realized; the on-load voltage
regulating switch realizes the intelligent control based on the
substation network; the operation and control status of the smart
transformer is evaluated according to the information detected by the
sensor, and the evaluation information is converted into visual
information; the control center and management system According to the
uploaded evaluation information, the coordinated optimal control of
transformer condition maintenance and regulation is realized.
The intelligent transformer has a strong adaptive control ability,
which can make self-adaptive adjustment in real time according to the
operating conditions and environment, and optimize the process control,
and all performance indicators are optimal. Such as on-load voltage
regulation adaptive control, load adaptive control, temperature adaptive
control, operation adaptive control, system economical operation
adaptive control, automatic compensation adaptive control and optimal
operation adaptive control. Intelligent transformer online monitoring
has the functions of self-testing and diagnosis, covering auxiliary
equipment monitoring and body monitoring.
The monitoring items
of intelligent substations mainly include partial discharge monitoring,
dissolved gas monitoring in oil, water content monitoring in oil, fiber
optic temperature measurement monitoring of windings, gas accumulation
monitoring, oil temperature monitoring at the bottom of the main tank,
iron core grounding current monitoring, intrusion wave monitoring,
Capacitive bushing capacity monitoring, bushing dielectric loss factor
monitoring, transformer vibration spectrum detection, transformer
acoustic fingerprint monitoring.
Protection function device
monitoring, cooler monitoring, on-load tap-changer monitoring are
auxiliary equipment monitoring. The intelligent transformer has the
functions of reliable alarm, protection, communication and information
exchange. When a fault occurs in the power supply area of the
transformer, the fault data can be transmitted to the upper management
system and the fault point and fault type can be displayed, providing a
basis for the maintenance personnel to quickly locate the fault and
arrange maintenance.
The transformer body, fuse, switchgear,
intelligent components, new electronic on-load tap-changer and
corresponding auxiliary equipment are integrated into an intelligent
combined transformer, which not only has the traditional power
transformation function but also integrates forced air cooling, power
metering , computer interface and other functions, the intelligent
combined transformer runs in the best state in real time.
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