Helios: a programmable software-defined solar module
Helios: a programmable software-defined solar module
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Helios：可编程软件定义太阳能模块
DOI：
10.1145/3276774.3276783
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Shenoy, Prashant
中科院分区：
文献类型：
--
作者：
Bashir, Noman;Irwin, David;Shenoy, Prashant
太阳能成本的下降和渗透率的上升将从根本上影响电网运营，因为公用事业必须不断抵消高度分散和“不可控”的太阳能发电站的电力波动，以保持电力供需之间的瞬时平衡。先前的工作提出通过设计各种主动控制太阳能发电的政策来优化电网运营来解决这个问题。然而，这些政策隐含地假设存在能够基于各种算法调节太阳能输出的“智能”太阳能模块。不幸的是，实现这样的算法目前是不可能的，因为智能逆变器只嵌入了少量的操作模式，是不可编程的。为了解决这个问题，本文提出了一个软件定义的太阳能模块，称为太阳能电池的设计和实现。Helios为DC-DC功率优化器提供了一个高级编程接口，使软件能够根据太阳的位置和天气情况，在零和当前最大值之间的真实的时间内远程控制太阳能模块的功率输出。与目前的智能逆变器不同，Helios专注于实现对真实的太阳能发电的直接编程控制，能够实施广泛的控制策略，而不是一些高度特定的操作模式。我们评估Helios的性能，包括其延迟，能源使用和灵活性。对于后者，我们实施和评估了广泛的太阳能控制算法，无论是在实验室中，使用太阳能模拟器和可编程负载，和户外。
The declining cost and rising penetration of solar energy is poised to fundamentally impact grid operations, as utilities must continuously offset, potentially rapid and increasingly large, power fluctuations from highly distributed and "uncontrollable" solar sites to maintain the instantaneous balance between electricity's supply and demand. Prior work proposes to address the problem by designing various policies that activelycontrolsolar power to optimize grid operations. However, these policies implicitly assume the presence of "smart" solar modules capable of regulating solar output based on various algorithms. Unfortunately, implementing such algorithms is currently not possible, as smart inverters embed only a small number of operating modes and are not programmable.To address the problem, this paper presents the design and implementation of a software-defined solar module, called Helios. Helios exposes a high-level programmatic interface to a DC-DC power optimizer, which enables sotware to remotely control a solar module's power output in real time between zero and its current maximum, as dictated by the Sun's position and weather. Unlike current smart inverters, Helios focuses on enabling direct programmatic control of real solar power capable of implementing a wide range of control policies, rather than a few highly-specific operating modes. We evaluate Helios' performance, including its latency, energy usage, and flexibility. For the latter, we implement and evaluate a wide range of solar control algorithms both in the lab, using a solar emulator and programmable load, and outdoors.
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