SunShade: Enabling Software-Defined Solar-Powered Systems
SunShade: Enabling Software-Defined Solar-Powered Systems
复制标题
SunShade：实现软件定义的太阳能系统
DOI：
10.1145/3055004.3055013
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Prashant J. Shenoy
中科院分区：
文献类型：
--
作者：
Akansha Singh;Stephen Lee;David E. Irwin;Prashant J. Shenoy
电网的设计并不是为了支持大规模的间歇性太阳能发电。因此，当前的政策对可能连接到电网的太阳能发电能力设置了硬性上限。不幸的是，用户越来越多地触及这些上限，这限制了太阳能的自然增长。为了解决这个问题，我们提出了软件定义的太阳能供电(SDS)系统，它可以动态地调节流入电网的太阳能电量。为了支持可持续发展系统，本文介绍了以编程方式控制太阳能流量大小的基本机制，包括对太阳能输出实施绝对限制的机制，以及一类新的加权功率点跟踪(WPPT)算法，该算法将对太阳能输出实施相对限制，作为其最大功率点(MPP)的一部分。我们实现了一个名为遮阳板的SDS原型，并评估了这些机制在精确度和保真度方面的权衡，以强制限制太阳能流量。例如，我们量化了可变条件(如云、路人和其他阴影)对基于搜索的WPPT算法保真度的影响，该算法必须定期偏离其上限，以发现影响上限精度的MPP变化。
The electric grid was not designed to support the large-scale penetration of intermittent solar generation. As a result, current policies place hard caps on the solar capacity that may connect to the grid. Unfortunately, users are increasingly hitting these caps, which is restricting the natural growth of solar power. To address the problem, we propose Software-defined Solar-powered (SDS) systems that dynamically regulate the amount of solar power that flows into the grid. To enable SDS systems, this paper introduces fundamental mechanisms for programmatically controlling the size of solar flows, including mechanisms to both enforce an absolute limit on solar output and a new class of Weighted Power Point Tracking (WPPT) algorithms that enforce a relative limit on solar output as a fraction of its maximum power point (MPP). We implement an SDS prototype, called SunShade, and evaluate tradeoffs in the accuracy and fidelity of these mechanisms to enforce limits on solar flows. For example, we quantify the effects of variable conditions, such as clouds, passersby, and other shading, on the fidelity of a search-based WPPT algorithm, which must periodically deviate from its cap to discover changes in the MPP that affect the cap's accuracy.