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首页留尼汪岛PV-BESS发电系统经济性能优化策略:案例分析与验证
留尼汪岛PV-BESS发电系统经济性能优化策略:案例分析与验证
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更新于2024-07-15
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本文探讨了"PV-BESS发电机的经济性能优化:以留尼汪岛为例"这一主题,针对的是一个具有高度可再生能源(RES)水平的非互联区域——留尼汪岛。留尼汪岛在过去的十年里致力于实现2030年电力自治的目标,通过推动可再生能源的整合,特别是光伏(PV)系统的广泛应用,来应对电网的可靠性和间歇性能源接入问题。为了确保电力系统的稳定,当地当局引入了新的监管规则,对可再生能源生产者提出约束。 作者提出的经济性能优化策略主要关注的是将光伏电站与电池储能系统(BESS)有效结合。策略的核心在于利用Modified Cuckoo Search算法,这是一种高效的元启发式优化算法,它具有快速收敛至全局最小值的优点,适合处理实际工程中的优化问题。该算法的应用旨在平衡系统经济效率与新的监管要求,通过考虑市场数据、光伏发电量的不平衡影响、电池技术和光伏技术特性,以及光伏发电预测模型,来优化系统的运行和储能策略。 留尼汪岛的实际光伏电站被用作案例研究,通过收集的实验数据对优化策略的效益进行了评估。结果显示,该策略不仅提高了光伏-BESS系统的经济效益,还确保了符合新的监管规定,从而在满足可持续发展目标的同时,提升了整个电力系统的稳定性。研究成果发表在《智能电网与可再生能源》期刊上,强调了在非互联电网环境下,如何有效地整合可再生能源并实现经济与环境目标的双重优化。 本研究对于理解在高比例可再生能源地区,如何通过智能优化策略提升光伏-BESS系统的经济性能,以及如何在政策和市场条件下实现能源转型具有重要的实践意义。这对于其他具有类似条件的地方提供了有价值的参考案例。
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C. Damour et al.
ta, the amount of PV-generated energy subject to penalties for imbalance, the
PV and the batteries technological characteristics together with a PV production
forecast model. To assess the effectiveness and relevance of the proposed strate-
gy, the economic analyses are performed on data measured on a real power plant.
Indeed, a one-year experimental data, collected from August 2013 to August
2014 on a 57 kWp PV farm coupled with a 78.5 kWh BESS, are considered.
The rest of this paper is organized as follows. The regulatory rules applied in
La Reunion are presented in Section 2. Section 3 is dedicated to model design. In
this section the PV production forecast model and the energy storage model are
detailed. The performance of the proposed optimization strategy in terms of
economical efficiency improvement is demonstrated in Section 4.
2. Regulatory Rules
In non-interconnected zones (NIZ) such as La Reunion, the large integration of
intermittent sources raises critical technical issues issue related to the reliability
of power supply. The reliability of an electrical grid can be defined by its ability
to supply the aggregate electrical demand and energy requirements of the cus-
tomers at all times, while withstanding sudden disturbances such as unantici-
pated loss of system elements (e.g. load or production fluctuations) [16] [17]
[18]. Currently the reliability of power supply in La Reunion is already lower
than in Metropolitan France. In La Reunion the average duration of electricity
not supplied is estimated at 4 h/year/consumer compared to 73 min in Metro-
politan France [5].
In this context, and considering the rapid and important growth of PV sys-
tems in La Reunion the last decade, the authorities have recently decided to set
up new regulatory rules to ensure the reliability of the power supply. Henceforth,
producers have to declare a time generation profile that represents the day-ahead
power injected by their plants, at a minute basis. If the mismatches between the
actual injected power and the announced power exceed the admitted tolerance, fi-
nancial penalties are applied. According to this regulatory framework, energy im-
balance is calculated with minutely resolution, and the tolerance band is taken
equal to ±5% of the installed PV power capacity
( )
PV_peak
P
.
The electricity tariff system relies on peak and off-peak hours. During peak
hours, 7 PM to 9 PM, the electricity feed-in tariff is more attractive. However,
during this time period, producers have to guarantee a constant power injection
to the grid comprised between 20% and 70% of
PV_peak
P
. The current electricity
tariff system applied to PV power producers in La Reunion, including peak and
off-peak feed-in tariffs, is summarized in
Table 1.
Table 1. Summary of tariff system in La Reunion.
Peak hours (7 PM to 9 PM)
[€ ct/kWh]
Off-peak hours
[€ ct/kWh]
Selling price
( )
s
C
60 40
Buying price
( )
b
C
40 40
116
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