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四字成语翻译开题报告
篇一：翻译报告开题报告
四川外语学院
XX
级翻译硕士专业研究生
毕业暨学位论文计划（翻译报告类）
四川外国语大学翻译学院制表
说明：
1.
报 告用中文撰写；
2.
学生须按时提交开题报告
并参加公开开题。
填表日期：
篇二：开题报告翻译
Summary of power flow calculation
The 1.1 power system
The early development of electric power industry,
electricity is directly in the user in the vicinity of
the station (or power plant) in production, the power
plant
to
run in
isolation. With the
development
of
industry
and
agriculture
production
and
the
city,
rapid
increase
in
electricity
requirements,
while
the
thermal
energy
resources
(such
as
coal)
and
water
resource rich areas are often far away from power are
concentrated
in
the
city
and
industrial
and
mining
areas, in order to solve this contradiction, it needs
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to build a large power station resource rich regions
in the power, then the power can be transmitted over
a long distance to the power users. At the same time,
in
order
to
improve
the
reliability
of
power
supply
and
utilization
of
the
overall
economy,
and
put
many
scattered
in
various
forms
of power
station,
the
power
transmission
lines
and
substations
linked.
The
generator,
the
step-up
and
step-down
substation,
transmission
lines
and
electrical
equipment
whole
organic
connected,
that
is
known
as
the
electric
power
system.
The
original
motive
power
system
and
generator
(such as steam turbine, turbine), the original motive
force
to
part (such
as
heat boiler,
reservoir, the
nuclear power station reactor), heating and heating
equipment, called dynamic system.
The concept of
novel DC transmission
presented. Flexible AC transmission technology refers
to
the
use
of
solid
state
electronics
and
modern
automatic
control
technique
for
AC
power
voltage,
phase
angle, impedance, power and the circuit for real-time
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closed-loop
control,
so
as
to
improve
the level
of
stable water pressure transmission capacity and power
system.
A
new
DC
transmission
technology
is
the
latest
achievement in refers to the application of the power
electronic technology, improving and simplifying the
converter station cost etc.
Operation
management,
the
trend
is
to
determine
the
basic starting point of power grid operation mode; in
the field of planning, the need for flow analysis to
verify
the
rationality
of
the
planning
scheme;
in
real-time environment, dispatcher power flow provides
a grid in the expected operating conditions in order
to
check
the
reliability
of
the
power
flow
distribution.
In many fields of power system dispatching operation
are related to the power flow calculation. The trend
is to determine the basic factors of operation state
of the power network, power flow problem is the basis
and
prerequisite
to
research
the
problem
of
power
system steady state.
Calculation of the 1.2 tide
Power flow calculation is a calculation of power
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system steady-state operation, which determines the
power system running state of each part according to
the given operating conditions and system wiring: the
bus voltage, power flow through
the components, the system power loss etc. In the
research
of
operation
mode
of
power
system
planning
and
design of the existing power system, calculation is
needed
to
quantitatively
analyze
the
rationality
is
the
program
or
run
mode
power
supply
using
the
trend.
Reliability and economy In addition, based power flow
calculation
and
calculation
system
of
dynamic
and
static
stabilization.
So
the
calculation
of
power
flow
calculation of power system is a very important and
basic.
Power
flow
calculation
of
power
system
is
divided
into
off-line
calculation
and
on-line
calculation
of
two
kinds,
the
former
is
mainly
used
for
the
operation
mode
of
the
system
design
and
the
arrangement of system, which is used to monitor the
running
system
and
real
time
control
The
use
of
electronic
digital
computer
for
power
flow
calculation
of power system from 50 time metaphase began. In this
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20 years, the power flow calculation have been used in
a
variety
of
different
methods,
the
development
of
these methods mainly focus on some basic requirements
for
power
flow
calculation
of(
本文来自：
小
草范
文
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:
四
字
成
语
翻
译
开
题
报
告
)
The
power
flow
calculation
requirements
can
be
summarized
as
the
following
points:
(1) The reliability of the calculation method and
convergence;
(2) The computer memory requirements;
(3) The calculation speed;
(4) The computational convenience and flexibility
Calculation
of
power
flow
in
mathematics
is
multivariate
nonlinear
equation
solution
of
a
group
the
methods
are
all
cannot
do
without
iteration.
Therefore,
calculation
of
flow,
firstly
it
can
reliably
converge,
and
gives
the
correct
answer.
Because
of
some
characteristics
of
the
structure
and
parameters
of
power system, and with the power system is enlarged
continuously, equation of order flow calculation is
more
and
more
high,
the
equation
is
not
any
mathematical
methods
can
ensure
the
correct
answers.
This
situation
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has become an important factor in the calculation of
power
system
personnel
continue
to
seek
a
more
reliable
method
The significance and development of the 1.3 power
flow calculation
Power flow calculation of power system is one of
the most basic calculation in electric power system
analysis,
calculation
of
the
steady
state
operation
of
normal and fault conditions of complex power system
Power
flow
calculation
of
the
target
is
calculated
for
a
power
system
running
state.
The
node
voltage
and
power
distribution, all elements used to check whether the
system
is
overloaded.
The
voltage
whether
meet
the
requirements,
distribution
and
power
allocation
is
reasonable
and
the
power
loss
etc.
On
the
operation
and
expansion of the power system, the power system in the
new
design
and
analyze
the
static
and
transient
stability of power system is based on power flow Power
flow calculation results are available such as steady
state analysis of power system, has a direct impact on
model
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