CAJ | 학술논문

基于两端直流输电技术的多端直流输电系统已在实际工程中得到了应用，并在远距离大容量输电方面有着广阔的发展前景。交流谐波计算作为其系统设计的重要环节，为交流滤波器的设计提供重要依据。采用一种多端直流输电系统交流侧谐波电流计算的快速解耦算法，该算法以时域分段法为基础，将多端直流输电系统各站交流谐波计算相互解耦，简化直流模型的建立。根据谐波电流计算结果，提出考虑各种工况和功率组合水平下多端直流输电系统交流侧滤波器设计的基本流程和方法，借助计算机程序，快速实现反复设计和优化，最终满足滤波器性能和定值的要求。最后，以一个并联型四端直流输电系统为例进行交流侧谐波计算和滤波器的设计，计算结果显示所设计的滤波器组合满足滤波器性能和稳态额定值校核的要求。
기우량단직류수전기술적다단직류수전계통이재실제공정중득도료응용，병재원거리대용량수전방면유착엄활적발전전경。교류해파계산작위기계통설계적중요배절，위교류려파기적설계제공중요의거。채용일충다단직류수전계통교류측해파전류계산적쾌속해우산법，해산법이시역분단법위기출，장다단직류수전계통각참교류해파계산상호해우，간화직류모형적건립。근거해파전류계산결과，제출고필각충공황화공솔조합수평하다단직류수전계통교류측려파기설계적기본류정화방법，차조계산궤정서，쾌속실현반복설계화우화，최종만족려파기성능화정치적요구。최후，이일개병련형사단직류수전계통위례진행교류측해파계산화려파기적설계，계산결과현시소설계적려파기조합만족려파기성능화은태액정치교핵적요구。
The two-terminal HVDC technology based multi-terminal DC (MTDC) transmission system has already been applied in practical projects and it has great potential in large capacity and long distance power transmission. AC harmonic current calculation is an important part of the system design because it would provide the foundation for AC filters design. A fast decoupled calculation method based on time domain piecewise method is proposed to calculate AC harmonic current in each converter station respectively, which simplifies DC model building. Based on the harmonics calculation results, the procedure and method of AC side filters design is put forward, considering different system operation modes and DC power levels. With the aid of computer program, the filters design and optimization process can be completed efficiently to achieve the performance of the filter and steady-state rating requirements. At last, a study case of a four-terminal parallel HVDC transmission system is provided to check the harmonics calculation procedure and filters design program. Calculation results show that the filters designed are qualified for both the performance calculation and rating calculation.