Droop-based active power curtailment for overvoltage prevention in grid connected PV inverters
Droop-based active power curtailment for overvoltage prevention in grid connected PV inverters
复制标题
基于下垂的有功功率削减，用于预防并网光伏逆变器中的过压
DOI：
10.1109/isie.2010.5637511
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
T. El
中科院分区：
文献类型：
--
作者：
R. Tonkoski;L. Lopes;T. El
光伏发电被认为是一种不可控制的电源，在高发电低负荷时期会在配电馈线中产生过电压。这通常是通过将PV的穿透水平限制在非常保守的值来防止的，即使关键时期很少发生。本文讨论了在径向低压馈线中使用基于下垂的有功限电（APC）技术来防止过电压，作为增加光伏装机容量和能源产量的一种手段。在一个典型的240V/75kVA加拿大郊区配电馈线中，考虑并测试了两种方案，该馈线有12个配备屋顶光伏系统的房屋。在第一种方案中，所有光伏逆变器具有相同的下垂系数。第二，提出不同的下垂系数，以便在所有光伏逆变器/家庭中共享减少的总有功功率和由此造成的收益损失。仿真结果证明了基于下垂的APC方案的有效性，并且在所有客户之间共享电力削减的选择是以总体上更高的电力削减为代价的。
Photovoltaics (PV) is considered a non-controllable power source which can create overvoltages in distribution feeders during periods of high generation and low load. This is usually prevented by limiting the penetration level of PV to very conservative values, even if the critical periods rarely occur. This paper discusses the use of droop based active power curtailment (APC) techniques for overvoltage prevention in radial low voltage (LV) feeders as a means for increasing the installed PV capacity and energy yield. Two schemes are considered and tested in a typical 240V/75kVA Canadian suburban distribution feeder with 12 houses equipped with roof-top PV systems. In the first scheme, all PV inverters have the same droop coefficients. In the second, the droop coefficients are proposed to be different so as to share the total active power curtailed, and consequent loss of revenue, among all PV inverters/houses. Simulation results demonstrate the effectiveness of the droop based APC schemes and that the option of sharing the power curtailment among all customers comes at the cost of an overall higher amount of power curtailed.