cost是什么意思供配电10kv变配电所设计中英文翻译

2021年1月19日发(作者：分别英语)
Substation Design


Power system is the system of production and consumption of electricity generation,
transmission,
transformation,
distribution
and
electricity
and
other
aspects
of
the
composition.
Its
primary
function
is
the
energy
conversion
means
through
natural
generation
power
into
electrical
energy,
and
then
by
transmission
and
distribution
substation and supplies power to each user. The main structure of the power system
has power (hydropower, thermal power plants, nuclear power plants, etc.), substations
(boost substation, load center substation, etc.), transmission and distribution lines and
load
centers.
Each
power
point
is
also
interconnected
to
achieve
energy
exchange
between different regions and regulation to improve security of supply and economy.
Substation
transmission
line
network
consisting
of
the
electricity
network
and
is
usually called.


Substation is from the main terminal , the main transformers, high and low voltage
power distribution equipment , relay protection
and control systems,
the power and
DC
systems
,
remote
and
communication
systems
,
the
necessary
reactive
power
compensation device and the main control room and other components . Among them,
the
main
terminal
, the main
transformers,
high
and
low
voltage
power
distribution
equipment , such as belonging to a system protection and control systems, the DC
system , remote and communication systems are secondary system . Main connection
is
the
most
important
part
of
the
substation
.
It
determines
the
function
of
the
substation , construction, investment , operation quality , maintenance conditions and
supply
reliability.
Generally
divided
into
several
basic
forms
single
busbar
,
double
busbar , a half breaker and ring wiring and so on. Substation main transformer is the
most important equipment , which directly affects the performance and configuration
of the advanced nature of the substation , economy and reliability . General need to
install
substation
main
transformer
2
to
3
sets
;
330
kV
and
below
,
the
main
transformer is usually a three-phase transformer , its capacity by 5 to 10 years into the
expected load selection . In addition, substations and other equipment selection and
the
overall
layout
of
the
site
selection
also
have
specific
requirements.
Substation

1
relay
protection
subsystem
(including
transmission
lines
and
bus
protection
)
and
component
protection
(
including
transformers
,
reactors
and
reactive
power
compensation
device
protection
)
categories.
Substation
control
mode
is
generally
divided into the direct control and optional control two categories.



Transformer
substation
is
the
main
equipment
is
divided
into
two-winding
transformer,
three-winding
transformers
and
autotransformers
that
high
and
low
voltage windings for each phase of a shared, taking a header from the middle of the
high voltage winding qualify as a low-voltage winding of the transformer. V
oltage is
proportional to the level of the winding turns, the current is inversely proportional to
the
number
of
turns.
Transformers
can
be
classified
according
to
their
role
and
step-down transformer step-up transformer. The former is used to send end substation
power
system,
which
is
used
by
the
end
of
the
substation.
V
oltage
transformer
and
voltage of the power system needs to adapt. In order to maintain
acceptable voltage
under
different
load
conditions
may
need
to
switch
the
transformer
tap.
By
way
of
transformer tap switch with load-load and no- load regulating transformer no-load tap
changer. OLTC is mainly used by the end of the substation.


V
oltage
and
current
transformers.
Their
operating
principle
is
similar
to
the
transformer, which the operating voltage of high voltage equipment and busbar, high
current
that
the
device
and
the
bus
load
or
short-circuit
current
measurement
instruments according to a predetermined ratio becomes low voltage relay protection
and
control
equipment
and
a
small
current .
Operation
at
rated
voltage
transformer
secondary voltage l00V
, current transformer secondary current is 5A or 1A. Current
transformer
secondary
winding
is
often
connected
with
the
load
close
to
a
short
circuit, please note: never let it open, otherwise it will endanger due to high voltage
equipment and personal safety or to the current transformer burned.


Switchgear includes circuit breakers, isolating switches, load switches, high voltage
fuses are disconnected and close the circuit devices. Breakers are generally composed
of a contact system, arc system, operation mechanism, release, housing and so on. The
role of the circuit breaker is turned off and the load circuit, and cut off the fault circuit

2
to prevent the accident and ensure safe operation. The high-voltage circuit breakers to
breaking 1500V
, current 1500-2000A arc, which can be stretched to 2m arc continues
to
burn
is
not
extinguished.
It
is
a
high
voltage
circuit
breaker
interrupter
must
be
addressed. Blowing arc extinction of the arc principle is diminished heat free cooling,
on the other hand by blowing arc elongated arc reinforced composite and diffusion of
charged particles, while the arc gap of charged particles disperse quickly restore the
dielectric strength of the medium.


Isolation switch (knife) primary role is to isolate the voltage at the device or line
maintenance, to ensure safety. It does not disconnect the load current and short-circuit
current, should be used in conjunction with the circuit breaker. After a power outage
should pull isolation switch before pulling circuit breakers, power transmission should
be fit after isolation switch is closed circuit breaker. If misuse will cause equipment
damage
and
personal

ability
to
be
able
to
disconnect
the
load
switch
without
disconnecting
the
load
current
fault
current
in
normal
operation,
generally
used for high-voltage transformer fuse with or without outlet voltage 10kV and above
regular operations.


In order to reduce the area substation positive development in recent years, sulfur
hexafluoride
enclosed
Switchgear
(GIS).
It
is
the
circuit
breakers,
disconnectors,
busbar, grounding switches, transformers, bushing or cable terminals were installed in
their
prime
in
concentrated
form
a
seal
between
the
overall
enclosure
filled
with
sulfur
hexafluoride
gas
as
insulating
medium.
This
combination
has
a
compact
structure, small appliances and light weight without affecting atmospheric conditions,
long maintenance intervals, no electric shock and electrical noise, etc., have been put
into
operation
before
the
development
of
765kV
substation.
Currently,
its
disadvantage is expensive, require high manufacturing and maintenance processes.


Ready
for
operation
management
of
substation
is
to
achieve
safe,
reliable,
reasonable and an important guarantee of economic power. So substation design must
meet the requirements, so based on evidence.


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