New Sustainable Operation Method for a Power Grid without an Energy Storage System: A Case Study of a Hospital in Japan
New Sustainable Operation Method for a Power Grid without an Energy Storage System: A Case Study of a Hospital in Japan
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DOI：
10.20508/ijrer.v12i3.13240.g8514
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发表时间：
2022
影响因子：
1
通讯作者：
Yuji Mizuno;Masaharu Tanaka;Yoshito Tanaka;F. Kurokawa;N. Matsui
中科院分区：
文献类型：
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作者：
Yuji Mizuno;Masaharu Tanaka;Yoshito Tanaka;F. Kurokawa;N. Matsui
提出了一种不使用储能装置的灾备基地医院电力系统可持续运行的新方法。医院里有一台柴油发电机，用于发生灾难时的孤岛运行，但由于油箱里储存的燃料变质，一直在排空。因此，柴油发电机无法启动，医疗服务也无法维持。为了防止燃料变质，认为有必要在偶尔使用燃料的情况下给油箱加油。即使在医院里，安装像光伏这样的备用电源系统也是减少能源使用的一种常见方法。在这些医院中，需要将柴油发电机和光伏发电结合起来，以响应需求侧响应。由于柴油发电机组和光伏发电机组组成的复杂系统的运行具有挑战性，因此有必要安装更多的储能系统。但是一些医院不想安装它，因为能量储存系统太贵了。本文提出了一种在没有储能系统的电网中作为虚拟电厂来对应需求侧响应的方法，以改善柴油发电机组与光伏发电机组复杂组合的运行问题。它首先需要一个负载预测。该预测方法是负荷超前一步预测，为柴油发电机组提供优化的输出分配和功率设定，使其在没有储能系统的情况下能够稳定运行。利用实测的光伏输出和医院的实际负荷建立仿真模型，对所提出的方法进行了评价。结果表明，在医院负荷较低的季节，合同需求为980 kW，光伏发电占20%，可对应±10%的需求侧响应。此外，在高峰负荷季节，它可以对应于±25%的季节需求侧响应。
- This paper presents a new sustainable operation method for running the power system of a disaster base hospital without the use of an energy storage device. There is a diesel generator for islanded operation in the hospitals in the event of a disaster, but it keeps emptying due to the issue that the fuel stored in the tank deteriorates. In consequence, diesel generators fail to start up and medical services cannot be kept. To prevent fuel deterioration, it is deemed necessary to refuel the tank with occasional use of fuel. Even in hospitals, installing backup power systems like photovoltaics is a common way to reduce energy use. In such hospitals, there is a demand to combine diesel generators and photovoltaics to respond a demand side response. Since it is challenging to operate a complicated system of diesel generators and photovoltaics, it is necessary to install more energy storage system. But several hospitals do not want to install it because energy storage system is so pricey. This paper proposes a method that can correspond demand side response as a virtual power plant in a power grid without an energy storage system to improve the operational issues of a complex combination of diesel generators and photovoltaics. It requires a load prediction first. The prediction method is the load one step ahead prediction and providing the optimized output distribution and rate setting to the diesel generators, stable operation is possible without energy storage system. The proposed method is evaluated by employing a simulation model using the measured photovoltaics output and the actual load at a hospital. As a result, it shows that it can correspond a demand side response of ± 10 % in the season when the load is low at the hospital with a contract demand 980 kW with 20 % of a photovoltaics. Furthermore, it is clarified that it can correspond a demand side response of ± 25 % in the season during peak load seasons.