TY - GEN
T1 - Research on novel parallel current sharing control technique of the stand-alone photovoltaic inverter
AU - Shan, Hongtao
AU - Kang, Yong
AU - Duan, Shanxu
AU - Zhang, Yu
AU - Yu, Mi
AU - Liu, Yongqiao
AU - Chen, Guoying
AU - Luo, Fang
PY - 2007
Y1 - 2007
N2 - Stand- alone photovoltaic systems have solved power supply in the many remote areas. Inverter is the key component of photovoltaic system. By paralleling several mid/low-power inverter units to compose a large power supply system, both the capability and the reliability of power supply system can be enhanced. The circumfluence among parallel inverter in PV is the key reason for preventing the parallel operating system from running normally. In order to share the load and restrain circumfluence, it is described that a digital current sharing control technique for inverter parallel operation in detail in this paper. The parallel system structure of the stand-alone photovoltaic inverter on distributed-logical-control is presented. Based on the analysis of circumfluence of paralleled system, characteristic of the power regulation, a novel digital power detection technique is deduced. With measuring and analyzing the instantaneous average current of all inverters and the output current of each inverter, both of the current components are used to control and regulate the amplitude and the phase of the output voltage. In this way, the control of current sharing in the inverter paralleling system is realized. The proposed control technique has been verified the good characteristic of restraining circumfluence by the results of the experiment. The control strategy has advantages of brevity, high practicality.
AB - Stand- alone photovoltaic systems have solved power supply in the many remote areas. Inverter is the key component of photovoltaic system. By paralleling several mid/low-power inverter units to compose a large power supply system, both the capability and the reliability of power supply system can be enhanced. The circumfluence among parallel inverter in PV is the key reason for preventing the parallel operating system from running normally. In order to share the load and restrain circumfluence, it is described that a digital current sharing control technique for inverter parallel operation in detail in this paper. The parallel system structure of the stand-alone photovoltaic inverter on distributed-logical-control is presented. Based on the analysis of circumfluence of paralleled system, characteristic of the power regulation, a novel digital power detection technique is deduced. With measuring and analyzing the instantaneous average current of all inverters and the output current of each inverter, both of the current components are used to control and regulate the amplitude and the phase of the output voltage. In this way, the control of current sharing in the inverter paralleling system is realized. The proposed control technique has been verified the good characteristic of restraining circumfluence by the results of the experiment. The control strategy has advantages of brevity, high practicality.
KW - Circumfluence
KW - Current sharing control
KW - Parallel
KW - Power detection
UR - https://www.scopus.com/pages/publications/49949090403
U2 - 10.1109/IECON.2007.4460175
DO - 10.1109/IECON.2007.4460175
M3 - Conference contribution
AN - SCOPUS:49949090403
SN - 1424407834
SN - 9781424407835
T3 - IECON Proceedings (Industrial Electronics Conference)
SP - 1645
EP - 1649
BT - Proceedings of the 33rd Annual Conference of the IEEE Industrial Electronics Society, IECON
T2 - 33rd Annual Conference of the IEEE Industrial Electronics Society, IECON
Y2 - 5 November 2007 through 8 November 2007
ER -