摘要
这里提出一种直流配电网的谐波状态空间建模方法。针对谐波模型在分析复杂系统时,难以写出状态空间方程的问题,首先建立了单向直流变换器、双向直流变换器和电压源型变换器(VSC)的稳态谐波模型,然后推导出各种电力电子装置的二端口式谐波等值电路,进而得到整个系统的谐波模型。在此基础上,对系统中的电压、电流进行频域分析,得出系统电压、电流谐波耦合导纳图。最后,仿真与实验验证了该方法的正确性和有效性。
Aharmonic state space modeling method for direct current distribution network is proposed.In order to solve the problem that it is difficult to write the state space equation when analyzing complex system with harmonic model,the steady-state harmonic models of unidirectional direct current converter,bidirectional direct current convert-er and voltage source converter(VSC)are established firstly,then the two port harmonic equivalent circuits of various power electronic devices are derived,and then the the whole system harmonic model is obtained.On this basis,the volt-age and current in the system are analyzed in frequency domain,and the voltage and current harmonic coupling admit-tance diagram is obtained.Finally,the correctness and effectiveness of the method are verified by simulation and experiment.
作者
周艳
李先允
王书征
ZHOU Yan;LI Xian-yun;WANG Shu-zheng(Nanjing Institute of Technology,Nanjing 211167,China)
出处
《电力电子技术》
CSCD
北大核心
2022年第2期91-96,共6页
Power Electronics
基金
江苏省重点研发计划项目(BE2018130)
江苏省研究生科研与实践创新计划项目(SJCX20_0716)。
关键词
变换器
直流配电网
谐波状态空间
谐波等值电路
converter
direct current distribution network
harmonic state space
harmonic equivalent circuits.
