CAJ | 학술논문

利用电力系统实时数字仿真器RTDS搭建了±200 Mvar 链式STATCOM控制保护装置的闭环测试系统.在进行链式STATCOM的RTDS建模时,考虑到模型链节数与实际装置链节数的不同,提出了一种混合开关频率的建模方法,在保证RTDS STATCOM模型等效开关频率与实际装置相等的同时,又使得大部分链式模块的载波频率与实际装置相符,从而保证在相同的载波频率下更好的检验模块之间的直流电压平衡控制效果.最后,利用该测试系统对±200 Mvar链式STATCOM与电网的相互作用以及控制保护装置的性能进行了全面的考察,实验结果表明该建模方法具有良好的等效性,STATCOM能有效的改善电网的电压稳定.控制保护装置设计正确,能够按照预期合理、迅速的动作.
이용전력계통실시수자방진기RTDS탑건료±200 Mvar 련식STATCOM공제보호장치적폐배측시계통.재진행련식STATCOM적RTDS건모시,고필도모형련절수여실제장치련절수적불동,제출료일충혼합개관빈솔적건모방법,재보증RTDS STATCOM모형등효개관빈솔여실제장치상등적동시,우사득대부분련식모괴적재파빈솔여실제장치상부,종이보증재상동적재파빈솔하경호적검험모괴지간적직류전압평형공제효과.최후,이용해측시계통대±200 Mvar련식STATCOM여전망적상호작용이급공제보호장치적성능진행료전면적고찰,실험결과표명해건모방법구유량호적등효성,STATCOM능유효적개선전망적전압은정.공제보호장치설계정학,능구안조예기합리、신속적동작.
Abstrcat:This paper introduces the power circuit structure of a ±200 Mvar cascade STATCOM as well as its control and protection strategies. A closed-loop test system of the controller is established based on real time digital simulator (RTDS). Considering the difference of chain numbers between the model and the real equipment, a modeling method of mixed switching frequency is proposed. It not only ensures the same equivalent switching frequency between the STATCOM model and the real controller, but also makes the carrier frequency of most of cascade modes tally with that of the real device, thus the DC voltage balance control effect between models can be detected more effectively under the same carrier frequency. The interaction problems between the STATCOM and the power system as well as the characteristic of the controller are investigated through numerous experiments. The results show the STATCOM has a satisfactory dynamic performance which can effectively improve the voltage stability of the power system. The controller can respond correctly and quickly in a pre-designed manner.