Title :
A study on DC capacitor voltage control strategy of cascade circuit DSTATCOM
Author :
Yuan, Zhou ; Mingchao, Xia
Author_Institution :
Electr. Eng. Major, Beijing Jiaotong Univ., Beijing, China
Abstract :
The cascade DSTATCOM has been widely used in various DSTATCOM prototypes and projects due to its advantages such as low loss, high efficiency, little harmonic content in output voltage, easy modularization, and so on.However,this kind of DSTATCOM structure contains inherent unbalance capacitor voltage in the DC-link,which may lead to abnormal running of DSTATCOM,especially in the transient process running of DSTATCOM. Traditional DSTATCOM DC-bus voltage control strategy is three-level DC voltage control. However, when the DC capacitor of all the chain of three-phase circuit is lower than the target value, the first level control will firstly lose control function, then finally the voltage will be a serious imbalance. In this case, it cannot be achieved to the network voltage dynamic compensation.
Keywords :
capacitors; compensation; power distribution control; static VAr compensators; transient analysis; voltage control; DC capacitor voltage control; DSTATCOM; cascade circuit; network voltage dynamic compensation; transient process; Automatic voltage control; Capacitors; Integrated circuit modeling; Inverters; Power system stability; Reactive power; DSTATCOM; cascaded structure; control strategy; influence factor; unbalance capacitor voltage in DC-link;
Conference_Titel :
Innovative Smart Grid Technologies - Asia (ISGT Asia), 2012 IEEE
Conference_Location :
Tianjin
Print_ISBN :
978-1-4673-1221-9
DOI :
10.1109/ISGT-Asia.2012.6303184
