Analysis and Suppression of Voltage Violation and Fluctuation with Distributed Photovoltaic Integration
Analysis and Suppression of Voltage Violation and Fluctuation with Distributed Photovoltaic Integration
复制标题
分布式光伏并网电压违规波动分析与抑制
DOI：
10.3390/sym13101894
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Yanqing Pang
中科院分区：
文献类型：
--
作者：
Yahui Li;Yuanyuan Sun;Kejun Li;Jingru Zhuang;Yongliang Liang;Yanqing Pang
近年来，随着高渗透分布式光伏发电的并网化，系统电压破坏和波动发生的频率越来越高。对高渗透分布式光伏集成系统中的电压破坏和波动进行了分析，并提出了相应的抑制策略。首先，基于太阳能电池和光伏控制系统模型，分析了影响光伏输出的因素。其次，分析了光伏并网引起的电压破坏和波动，建立了母线电压波动与光伏功率变化之间的二次抛物线关系。其次，根据分布式光伏虚拟同步发电机的特点，提出了一种双层次抑制策略，充分利用了无功调节能力，在满足标准要求的同时，保持了电源的对称性。该策略可以方便地实现快速响应，支持光伏的广泛接入。此外，采用该方案可以有效地抑制系统电压的破坏和波动。最后，在考虑光伏接入位置、容量和局部遮挡的情况下，用现场实测数据验证了该策略在IEEE 33节点配电网中的有效性。分布式光伏接入系统后，超过60%的公交车似乎经历了母线电压违规。该方法能有效地抑制20%以上的电压偏差和6%以上的电压波动，使系统电压控制在1.07PU以下。电压波动控制在4%以内，满足电能质量标准要求。
In recent years, the violation and fluctuation of system voltage has occurred with greater frequency with the integration of high-penetration distributed photovoltaic generation. In this paper, the voltage violation and fluctuation in a high-penetration distributed photovoltaic integrated system is analyzed, and then a corresponding suppression strategy is proposed. Firstly, based on solar cell and photovoltaic control system models, the influence factors of photovoltaic output are analyzed. Secondly, the voltage violation and fluctuation caused by photovoltaic integration is analyzed, and the quadratic parabola relationship between bus voltage fluctuation and photovoltaic power variation is constructed. Next, according to the virtual synchronous generator characteristic of distributed photovoltaics, a double-hierarchical suppression strategy is proposed to make full use of reactive power regulation capability, which can maintain the symmetry of power supply while meeting standard requirements. The proposed strategy can conveniently realize quick response and support the photovoltaic extensive access. Moreover, with the employment of the proposal, the system voltage violation and fluctuation can be suppressed effectively. Finally, considering the photovoltaic access location, capacity, and partial shading, the effectiveness of the proposed strategy is verified in IEEE 33-bus distribution system with field measured data. After distributed photovoltaic accesses the system, more than 60% of buses appear to have undergone bus voltage violation. With the proposed method, more than 20% of the voltage deviation and more than 6% of the voltage fluctuation are effectively suppressed so that the system voltage can be kept below 1.07 p.u. and the voltage fluctuation can be kept within 4%, meeting the requirements of power quality standards.
影响因子：
6.6
作者：
Fathi, Abdolwahhab;Shafiee, Qobad;Bevrani, Hassan
通讯作者：
Bevrani, Hassan