静止同步补偿器直接电流控制的分析与研究.pdf

中 文 摘 要
摘要：静止同步补偿器 (STATCOM)作为柔性交流输电系统(FACTS)
中的并联连接控制器，可以对电网的无功功率进行动态补偿，能够补
偿感性无功和容性无功，因而成为交流输电系统中较为理想的无功补
偿设备。因此近年来，STATCOM 在电力系统中日益得到广泛的应用。
本文介绍了电力系统无功补偿的发展与现状，分析了采用三相电
压型逆变器为主电路结构的静止无功发生器装置的工作原理以及数
学模型。
在控制电路上采用了过零同步方法来采集电网同步电压数据，可
以实现对电网频率的实时跟踪。通过对比不同控制方法的优缺点，采
用了基于瞬时无功功率理论的三角波直接电流控制方法。该方法具有
控制精度高，稳态性能好，瞬时响应快等优点。
最后，运用仿真软件 分别搭建 STATCOM 控制器的仿
真模型，并进行详细的仿真分析，仿真结果证实了该系统整体结构、
电流检测、控制策略及参数计算方法的正确性和可行性。另外，针对
不同 IGBT 开关频率，对逆变器输出波形做了比较分析。

关键词： 静止同步补偿器，直接电流控制，无功补偿，数字信号处
理器

ii
ABSTRACT
ABSTRACT: The Static Synchronous Compensator (STATCOM) is one
of the Flexible AC Transmission System (FACTS) equipments controller
by parallel connection which can motion compensate the electric
network's reactive power，at the same time it can compensate inductive
and capacitive reactive power, so STATCOM becomes one of the most
reactive-load compensation equipment in AC transmission
system．Therefore, in the power system, STATCOM is widely used in
recent years.
In this paper, the development and actuality of reactive power
compensation in electric network is presented. It also analyzes the basic
principle and mathematical model, which are using three-phase voltage
source inverter-based circuit structure of static Var generator devices.
Adopting the zero synchronous sampling technique used on data
acquisition in power network, which can automatic follow power
network’s frequency. By comparing the advantages and disadvantages of
different control methods, using the instantaneous reactive power theory
based on triangular wave direct current control method. This method is
conducive to improve the system control accuracy, stability, respond
speed.
Finally, the simulation software build simulation model, by
iii
detailing simulation analysis, the simulation results verify t