CAJ | 학술논문

传统的高压直流输电系统一般在换流站交流网侧布置滤波兼无功补偿的装置,谐波与无功功率通过换流变压器回馈网侧时不仅会对变压器,同时也会对发电机产生不良影响.为此,以新型直流输电系统为平台,将传统的滤波和无功补偿装置移至阀侧第三绕组侧,利用变压器耦合绕组的谐波安匝平衡,使谐波电流与网侧隔离开来,并通过动态模拟实验,分析未接入滤波器和接入滤波器时,新型直流输电系统下谐波所引起的发电机的损耗和效率.结果表明,新型直流输电系统在改善发电机输出端电压和电流正弦波形的质量,提高发电机的额定出力方面具有独特的优越性.
전통적고압직류수전계통일반재환류참교류망측포치려파겸무공보상적장치,해파여무공공솔통과환류변압기회궤망측시불부회대변압기,동시야회대발전궤산생불량영향.위차,이신형직류수전계통위평태,장전통적려파화무공보상장치이지벌측제삼요조측,이용변압기우합요조적해파안잡평형,사해파전류여망측격리개래,병통과동태모의실험,분석미접입려파기화접입려파기시,신형직류수전계통하해파소인기적발전궤적손모화효솔.결과표명,신형직류수전계통재개선발전궤수출단전압화전류정현파형적질량,제고발전궤적액정출력방면구유독특적우월성.
In the traditional high voltage direct current system, the filters and reactive power compensating equipments are always placed in the AC net side of the converter. It cannot overcome the bad effects not only to the transformer but also to the generator when the harmonics and reactive power flows into the AC net through the converter transformer. It moves the traditional filters and reactive power compensating equipments to the third windings of valve side in the novel inductive filtering technology, that using the ampere-turn balance of the transformer's coupled windings isolates harmonic current from net side. This article analyzes the loss and efficiency of generator cased by harmonics with filter and without filter in the novel DC transmission system. Finally, by dynamic simulation experiment and analyzing the result, it indicates that the novel system has its unique advantage of improving the quality of voltage and current in the fan-out of generator and increasing rated export for generator.