英语翻译I.INTRODUCTIONThe primary function of power systems is t

英语翻译
I.INTRODUCTION
The primary function of power systems is to supply
electricity to its customers.However,whe,n the system itself
is in emergency state,it may shed partial loads to ensure the
power supply to important loads,as the last resort to maintain
system integrity.Load shedding in bulk power system has
been studied many years [1 ]-[6].Basically,these methods
are either based on the simplified dynamic model that treat all
the generators in the system as one equivalent generator,or
based on steady state models.In [7],the optimal load
shedding problem was treated in a different way,The
dynamic model was used and they were not cohered to one
equivalent generator.‘The problem was then formulated as an
optimization tlmction with system,operation and security
constraints.In solving this problem,the discrezation
technique was used to transfer the differential equation to
algebraic equations.
Load shedding in the power systems with distributed
generation is studied here.Distributed generation is smallscale
power generation that is ‘usually connected to the
distribution system.It could be combustion engine,small
hydro,photovoltaic arrays,fiel cells,microturbines or battery
storage [8].For utility,distributed generation can help to
maintain system stability [9],provide the spinning reserve
[10] and reduce the transmission and distribution cost.For
end user,the distributed generation can provide power supply
flexibility and improve power quality.For society,the
renewable energy can reduce the emission from the
traditional power plants.

应该出自论文吧,里面有缺单词的部分,也有单词打错了,不过大概翻译起来,可以参考以下：
1. 引言
电力系统的主要功能是向用户提供电力.然而,当系统本身是在紧急状态下,为了维护系统的完整性,所采取的最后手段可能是削减部分负荷,以保证重要负荷的电源供应.大电网负荷削减已经被研究了很多年[1 ]-[6].基本上,这些方法要么是基于简化的动态模型,即把系统中所有的发电机视为一个等效发电机,要么是基于稳态模型.在[7] (此处不完整,应为某个研究) 中,以不同的方式处理最佳负荷削减问题.（在此研究中）他们使用了动态模型,但是并没有（将所有的发电机）结合为一个等效发电机.问题在于（如何）制定优化系统功能（此处的tlmction应为function）,以及（考虑）操作和安全方面的约束.为了解决这个问题,（他们使用了）离散化（discrezation应为discretization）技术将微积分方程转换为代数方程.
这里对关于分布式发电的电力系统的负荷削减进行了研究.分布式发电是通常连接到配电系统的小规模的发电.可以是内燃机,小水电,光电池,燃料（此处应为Fuel）电池,微型燃气轮机或电池存储[8].作为一个设施,分布式发电可以帮助保持系统的稳定性[9],提供旋压的储备[10],减少输电和配电的成本.对于最终用户,分布式发电可以提高电源的灵活性,改善电能质量.对整个社会而言,可再生能源可以减少传统发电厂的排放.