A joint day-ahead scheduling for photovoltaic-storage systems based on extended QV bus-type power flow

作者：Liu, Zehuai; Zhai, Shitao; Zhang, Yongjun^*; Yang, Jiahao; Liu, Wenze

来源：Power System Technology, 2015, 39(12): 3435-3441.

DOI：10.13335/j.1000-3673.pst.2015.12.016

• Day-ahead scheduling
• Electricity generation
• Peak load shifting
• Photovoltaic
• Point of common coupling
• Power flow calculations
• QV bus types
• Voltage fluctuations

This paper focuses on voltage fluctuation and mismatch between electricity generation and load demand caused by photovoltaic access to distribution network. Energy storage can be used to suppress negative effects of photovoltaic. According to characteristics of point of common coupling (PCC) of photovoltaic and energy storage access, extending QV type-bus to describe PCC feature is more reasonable. Solution of power flow calculation with QV type-bus by modifying the order of each subblock of Jacobian matrix is also shown in this paper. Furthermore, a joint day-ahead scheduling of photovoltaic-storage system is put forward in core view of voltage control at PCC and at the aim of suppressing voltage fluctuation. Using power flow calculation with QV type-bus targeting on controlling voltage at PCC, two scenarios whether storage system output excesses its limit are considered. When output excesses its limit, the bus type is transformed. As a consequence, node voltage curve and joint power curves of photovoltaic-storage are gained. The result is comprehensively compared with the case without energy storage and the case where photovoltaic and energy storage operates with constant power. It shows that the proposed strategy has a significant improvement on suppressing voltage fluctuation, improving power flow, peak load shifting and so on.

• 出版日期2015-12-5
• 单位华南理工大学