海上风电经24脉动二极管整流器送出系统的交流滤波器优化配置

Optimal Configuration of AC Filter for 24-pulse Diode Rectifier Unit Based Offshore Wind Power Integration System

整流站采用二极管整流器能够提升远距离大容量海上风电直流送出系统的经济性和可靠性。提出了基于24脉动二极管整流器的海上风电并网系统中交流滤波器的优化配置方法。首先,明确了基于24脉动二极管整流器的海上风电送出系统结构,阐述了24脉动二极管整流器的基本原理。然后,计算了24脉动二极管整流器的无功功率需求,对于24脉动二极管整流器,可以将设计复杂的交流滤波器简化为电容器,通过对有功功率变化范围内不同容量电容器滤波效果进行扫描,提出了综合考虑滤波效果和滤波器容量的交流滤波器无功容量优化方法。最后,在PSCAD/EMTDC中对基于24脉动二极管整流器的海上风电送出测试系统进行了谐波分析和交流滤波器优化设计。

The diode rectifier unit can improve the economy and reliability of the long-distance large-capacity offshore wind power DC transmission system.This paper presents an optimal configuration method for AC filters in offshore wind power integration systems based on the 24-pulse diode rectifier unit.Firstly,the structure of the offshore wind power transmission system based on the 24-pulse diode rectifier unit is defined,and the basic principle of the 24-pulse diode rectifier unit is expounded.Then,the reactive power requirement of the 24-pulse diode rectifier unit is calculated.For the 24-pulse diode rectifier unit,the complicated AC filter can be simplified into a capacitor.By scanning the filtering effect of capacitors with different capacities in the range of active power variation,the reactive power capacity optimization method of the capacitor is proposed,which takes the filtering effect and the filter capacity into consideration.Finally,in PSCAD/EMTDC,the harmonic analysis and AC filter optimization design of the offshore wind power test system based on the 24-pulse diode rectifier unit are carried out.