毕业论文中英文翻译-变电站翻译

2021年1月26日发(作者：天知道)

本科毕业设计（论文）


中英文对照翻译






院（系部）

专业名称

年级班级

学生姓名

指导老师






英文文献

Second substation equipment over-voltage protection on electronic information
system for the protection of core equipment for the construction of a protected both
pressure
and
other
potential
system,
and
through
all
levels
of
over-voltage
surge
protectors
of
the
current
step
by
step
into
the
land
,
Substation
secondary
safety
equipment and reliable operation.
1 second over-voltage substation protection

In
recent
years,
the
substation
communications,
communications
systems,
protection systems,
background management module frequent
over-voltage damage,
the
main
reason
for
this
is
weak
and
its
related
systems
products
over-voltage
protection
level
is
weak,
or
no
guard
against
over-voltage
Technical
measures,
the
consequences
for
the
safe
operation
of
power
grids
bring
about
a
greater
negative
impact.
With
integrated
automation
systems
and
automation
systems
such
as
communication
systems
in
the
substation
weak
secondary
by
the
wider
use
of
such
electronic
systems
(equipment)
components
of
the
integrated
more
and
more,
the
growing
volume
of
information
storage,
speed
and
accuracy
of
the
Increased
and
operates only
a few volts, current
information only microamp
level,
thus
extremely
sensitive
to
outside
interference,
especially
the
lightning
and
electromagnetic
pulse,
such
as
over-voltage
tolerance
is
low.
When
thunder
and
lightning,
such
as
over-voltage and accompanied by the electromagnetic fields reach a certain threshold,
ranging
from
system
failure
caused,
resulted
in
heavy
equipment
or
permanent
damage to its components. Despite the thunder and lightning viewpoint of electronic
systems
(equipment)
is
unlikely,
but
lightning
strike
near
the
land,
buildings,
communication
and
air
supply
line
directly
Leiyun
discharge
form,
or
because
of
electrostatic
induction
and
the
impact
of
electromagnetic
induction
formation
of
over-voltage, There might be connected to the power lines, signal lines or grounding
system, through various interfaces to transfer, coupling, radiation and other forms of
invasive electronic system (equipment) and lead to serious disturbances or incidents.
Therefore, strengthening and improving the electronic system (equipment) protection,
to minimize the impact of interference by lightning and other damage caused direct
losses and indirect losses, has become the urgent need to solve the problem.
2 over-voltage protection design

IEC
(International
Electrotechnical
Commission)
TC/81
mine
technical
committee
will
be
divided
into
internal
and
external
mine
mine
in
two
parts,
the
external mine is lightning rod (or with lightning, lightning network), Yin Xiaxian and
grounding
system,
Objects
to
be
protected
from
direct
lightning
strikes,
mine
is
to
prevent internal lightning and other internal over-voltage damage caused by invasive
equipment.
A
comprehensive
mine
and
over-voltage
protection
systems
must
be
integrated
use
of
discharge
(segregation),
both
pressure
(and
other
potential),
shielding
(isolation),
grounded,
limit
pressure
(clamp)
protection,
and
other
technology, in accordance with the external mine And the principle of internal mine,
in
accordance
with
the
targets
of
protective
features,
flexible
application
to
take
concrete measures, constitute a complete protection system. Over-voltage substation
in
the
form
are:
Lightning
over-voltage,
the
resonant
frequency
over-voltage
and
over-voltage,
over-voltage
operation,
these
over-voltage
transmission
or
electromagnetic
induction
to
the
way
the
lines
and
equipment
on
a
dangerous
over-voltage,
in
particular,
Lightning
over-voltage,
lightning
substation,
in
the
low-voltage power supply system and weak system to produce a strong over-voltage
sensor, while the substation to
potential rise (for example:
the substation grounding
resistance to 1 Q, lightning current 10 kA, while the potential for 10 kV), due to the
increased potential of the counter lines and equipment damaged lines and equipment
and
the
events
have
occurred,
therefore,
despite
the
substation
outside
the
mine
system
(lightning
rod.
Yin
Xiaxian
And
grounding
devices)
in
line
with
national
standards
and
the
requirements
of
Buban,
and
the
integrated
automation
and
communications automation systems, such as weak secondary have been taken, such
as
shielding,
grounding,
isolation,
filtering,
and
other
measures,
but
it
can
not
completely avoid over-voltage powerful lightning And voltage of the system counter
the disruption caused damage and, therefore, the second weak system substation and a
mine-voltage must also take the appropriate protective measures, in accordance with
the IEC within the mine area EMP, the device's power cord, signal Lines, data lines,
and
the
installation
of
lightning
protection
and
internal
over-voltage
devices
to
prevent
lightning
sensors,
channeling
people
along
the
lightning
current,
voltage
counterattack, such as transient voltage surge too transient over- voltage caused by a
fault and damaged electronic equipment. Over-voltage surge protection in accordance
with
its
connection
mode
is
divided
into
two
series
and
parallel,
the
use
of
over-voltage
surge
protection
tandem
with,
there
may
exist
because
of
signal
transmission does not match the causes of transmission of the signal interference, in
particular
data
Communication
Interface
in
the
series
were
over-voltage
surge
protection
in
place,
will
have
the
normal
data
communications.
Therefore,
the
data
communications access I: I in the series were over-voltage surge protection in place,
the transmission of data must be carried out conscientiously check if the data are not
normal
transmission,
it
may
be
due
to
the
reasons
do
not
match
the
transmission
signal Interference, should be replaced to match the over-voltage surge protection for.
If the use of over-voltage surge protection for use of parallel, the situation is basically
non-existent,
but
the
connection
mode
of
over-voltage
surge
protection
for
higher
technical requirements.
3 secondary system over-voltage substation protection

3.1 points over- voltage electricity system protection


Substation
installed
in
the
communications
dispatch
automation
systems
are
used AC power or a DC power supply equipment for the rectification of its links are
generally
larger
capacity
filter
capacitance,
the
transient
over-voltage
shock
absorption
of
a
certain
extent,
the
station
Low-voltage
transformer
side
go
to
feed
between the screen using a shielded cable and equipment have a good grounding, the
use of modern technology to analyze mine, we must increase the circuit's segregation
measures,
because
its
grounding,
protection
and
other
electrical
grounding
all
Grounding
devices
using
the
same
equipment,
and
equipment
are
in
a
LPZOB,
the
relative
strength
of
strong
electromagnetic
pulse,
the
station
changed
to
prevent
low-pressure
side
although
there
are
lines
intrusive
wave
arrester,
but
the
residual
pressure
high,
in
the
substation
of
lightning,
through
the
line
Coupling
and
the
potential rise caused by over-voltage counterattack still exist, and high-pressure side
of
the
residual
pressure
as
high
as
several
thousand
volts,
it
is
necessary
to
these
scheduling automation equipment for the power supply over-voltage circuit protection.
Lightning Protection in accordance with the principle of regional division, substation
equipment
in
the
secondary
power
supply
system
over-voltage
sensors
lightning
protection may be two (B, C level) for the protection of segregation. B-mine use is
generally greater flow capacity of the mine installations, the Lightning could be more
casual
Liuxie
people,
to
achieve
the
objective
of
current
limit,
over-voltage
at
the
same time will reduce to a certain extent, c-mine use With lower residual pressure of
the mine installations, you can loop in the remaining scattered lightning Liuxie people,
to
limit
the
purpose
of
over-voltage,
over- voltage
equipment
can
be
reduced
to
the
level of tolerance. The main power supply system is inhibited lightning protection and
operation
of
the
power
back
to
the
road
and
over-voltage
surge.
According
to
the
substation
status
of
the
substation
of
the
second
mine- sensing
system
and
the
operation
and
use
of
two
over-voltage
protection.
As
build
more
substations
in
the
region
more
open,
relatively
strong
electromagnetic
strength,
power
lines
and
communication cables are very vulnerable to lightning attacks sensors, sensors along
the
over-voltage
power
lines
and
communication
lines
into
one
device,
which
will
damage
equipment,
Therefore,
the
exchange
of
first-class
bus
to
install
the
power
protection (B level) is to ensure the safety of the entire control room, and 80 percent
of the over- voltage China, scattered to the earth, play a primary role in the protection,
but are still in the exchange of feeder Some of the B-level power supply voltage and
mine
the
residual
pressure
increases
on- line
and
must
therefore
be
important
in
the
exchange
of
feeder
lines
(DC
charging
screen,
UPS,
etc.)
c-level
power
protection,
which
would
curb
over-voltage
electrical
equipment
to
back-end
To
the
level
of
tolerance.
Protective location: It is 1 EC1312 (LEMP protection
protection
principles.
Arrester
installation
should
be
in
different
locations
at
the
junction of protected areas, this network, the first-class protection should be located in
the bus exchange.
In Two
on the bus with the installation of a B-class models
of a
three-phase power supply voltage surge protector.

Install Location: AC bus (cabinet).





For the more important feeder lines on the exchange of equipment, here for the
DC
charge
screen,
the
installation
of
c-level
three-phase
power
arrester.
As
DC
charging screen is
two-way exchange of electricity supply, so the screen in
the DC
charge
with
the
installation
of
two
models
of
c-level
three-phase
power
supply
over-voltage surge protector. Installation location should choose the DC charge screen
open exchange of air power Commissioner Office.

3.2 integrated automation system over-voltage protection





Protective
position:
Computer-based
integrated
automation
system's
ability
to
bear a very low voltage, several hundred volts of over-voltage is enough to damage
the equipment, so must the high side arrester the residual pressure (thousands of volts)
to
further
curb
to
meet
equipment
Insulation
level
of
need,
and
because
of
the
potential rise to power and the induction loop is also over-voltage line up on KV, to
be
used
in
the
exchange
of
integrated
automation
system
to
the
exchange
on
the
c-level single-phase installation of a surge Voltage protection. Location should choose
to install automated-ping in the Composite Air switch the AC power.
3.3 did not ask off power supplies (UPS) over-voltage protection





Protection
here:
because
of
the
internal
computer
systems,
hubs,
monitoring
equipment, electric energy billing systems and so on through the UPS power supply
protection,
in
order
to
protect
the
safety
of
these
micro-electronics
equipment,
the
UPS power supply device in front of the installation of a c-Surge Voltage protection.
Optional models: The (UPS for single-phase power input) C-class single-phase power
surge
or
over-voltage
protection
(UPS
for
the
three-phase
power
input)
of
c-level
three-phase power supply over-voltage surge protector. Installation should choose the
location of UPS into the front line.

3.4 communication interface over-voltage protection

Communication Interface over-voltage protection compared with the grid supply
system, this over-voltage circuit on the degree of sensitivity is much higher, and these
are
over-voltage
equipment
in
the
circumstances
it
is
very
fragile.
Equipment
insulation tolerance level is very low. With the equipment connected to a signal line,
data
lines,
measurement
and
control
lines,
and
these
are
basically
in
line
LPZOB
region,
but
also
through
the
LVZOA
region,
on
the
lines
of
sensors
over-voltage
relatively strong, according to the IEC test, when the electromagnetic field Strength