摘要：孤岛电站系统的一个重要组成部分就是柴油发电机组，但是因为每台柴油发电机组容量很小，所以整个孤岛电站需要的动力要通过多台发电机组来共同实现，而且考虑到设计电站系统非常复杂等客观因素，所以并联柴油发电机组来组成整个孤岛电站系统。

本课题的研究是针对孤岛电站的并联运行的功率分配不均衡，提出控制策略，实现功率的均衡分配。并且利用PSCAD仿真软件验证本篇文章所设计的控制策略的有效性。很多时候，我们对于柴油发电机组的研究，尤其是其进行并联运行的时候，往往会对发电机建立模型以及对于它的并联运行过程建立模型。然而，我们可以用许许多多不同的建模方法来建立发电机的模型，但很大一部分方法都是关于单台发电机模型的仿真。所以，这篇文章通过将柴油发电机模型作为整篇文章的基石，然后对于两台柴油发电机组并联运行的情况，进行搭建了数学模型。

本文的主要工作是均衡分配发电机组并联运行时候的功率，采用虚有差调节法，增加有功功率和无功功率分配环节，从而均衡分配有功功率和无功功率。并且本文通过PSCAD仿真软件建立两台发电机组并联运行的模型，验证了本文的控制策略的有效性，得出了正确的结论。

关键词：孤岛电站；发电机组；并联运行；功率分配

Abstract：One of the important parts of the island power station is the diesel generator sets. But the capacity of single diesel generator set is very small, so the entire island power station needs more disel generator sets to achive and considering the design of power system is very complex and it other objective factors, so parallel some  diesel generator sets to form the whole island power station system.

The research of this paper is aimed at the unbalanced power allocation of the parallel operation of islanding power station, and puts forward the control strategy to realize the balanced distribution of power. And PSCAD simulation software is used to verify the effectiveness of the control strategy.When we study diesel generator set,especially parallel operation, we often buid the diesel generator model and parallel operation control model. Although there are many different modeling methods to build diesel generator models, most of them are single model simulation. Taking diesel generator model as the core, the modeling of two diesel engine generator sets in parallel operation is carried out.

The main work of this paper is to balance power allocation of the disel engine generator sets in parallel operation, using the virtual difference adjustment method and increase active power and reactive power distribution to balance distribution of active power and reactive power. The model of parallel operation of two generator sets is established through PSCAD simulation software, and verify the validity of the control strategy .The correct conclusion is obtained.

Key words: island power station; generator set; parallel operation; power allocation

目录

第一章绪论..1

1.1课题研究背景和意义..1

1.2国内外研究现状和存在的问题..1

1.3PSCAD软件介绍.2

1.4主要研究内容.3

第二章发电机组建模与分析42.1原动机及其调速系统模型...4

2.1.1柴油机的数学模型...4

2.1.2柴油机的调速系统...6

2.1.3调速系统的数学模型.7

2.2同步发电机及励磁系统.9

2.2.1同步电机数学模型...9

2.2.2励磁系统的数学模型13

2.2.3励磁系统的调压特性15

2.3发电机组仿真分析16

2.4本章小结18

第三章孤岛电站发电机组功率分配原理.19

3.1稳定频率和有功功率均衡分配原理..19