Development modes analysis of renewable energy power generation in North Africa

North African countries generally have strategic demands for energy transformation and sustainable development.Renewable energy development is important to achieve this goal.Considering three typical types of renewable energies—wind,photovoltaic(PV),and concentrating solar power(CSP)—an optimal planning model is established to minimize construction costs and power curtailment losses.The levelized cost of electricity is used as an index for assessing economic feasibility.In this study,wind and PV,wind/PV/CSP,and transnational interconnection modes are designed for Morocco,Egypt,and Tunisia.The installed capacities of renewable energy power generation are planned through the time sequence production simulation method for each country.The results show that renewable energy combined with power generation,including the CSP mode,can improve reliability of the power supply and reduce the power curtailment rate.The transnational interconnection mode can help realize mutual benefits of renewable energy power,while the apportionment of electricity prices and trading mechanisms are very important and are related to economic feasibility;thus,this mode is important for the future development of renewable energy in North Africa.

The state-of-the-arts of the study on grid interconnection between Iberian Peninsula and West Maghreb region

With the change of energy structure in Europe and the trend of diversification of energy supply, the interconnection of the power grid in the Mediterranean region has gradually become a hotspot in European energy research. This paper introduces the power supply, load demand, power grid construction and the present situation of multinational interregional interconnection in the Iberian Peninsula of the Tour of Mediterranean in Europe(Portugal and Spain) and the Western Maghreb countries(Morocco and Algeria). And the driving force and influence factors of regional power grid interconnection are also analyzed. According to the MEDGRID project aimed at realizing the Mediterranean power grid interconnection, this paper presents the interconnection schemes of the Iberian Peninsula and the Western Maghreb. Furthermore, the subsequent technical problems need to be solved are also expounded.

基于奇诺多面体的虚拟电厂分布式资源广域聚合调控方法

由于分布式资源在配电网侧的普及,其巨大的灵活性潜力挖掘变得愈发重要。首先,选取空调负荷、储能设备、柴油发电机作为典型资源,建立了具体资源的动态电气模型,并刻画其可行域空间。然后,以奇诺多面体(Zonotope)为基础,提出一种面向广域分布式资源的高效聚合方法。在此基础上,针对Zonotope的特殊数学形式,提出Zonotope与半空间形式多面体的数学形式精确转换方法,并通过此方法将具体分布式资源的聚合集群应用于虚拟电厂(VPP)场景下的优化调控。通过算例分析验证了该聚合方法的有效性,并与其他聚合方法对比分析了该方法在精确性上的优势。最后,结合算例结果分析了资源集群聚合后的调控方法在经济性和计算效率方面的成效。

高速电力线载波一体化信道特征测量系统设计

高速电力线载波通信技术在智能电网和智慧照明等领域广泛应用。针对电力线独有的通信信道特征进行实时测量和分析,对电力线载波通信技术的推广有重要意义。文章提出了一种一体化信道特征测量系统的设计方法,利用在网运行电力线载波通信模组将信道衰减和噪声功率等信道特征的实时测量和数据采集分析处理等功能进行高度集成,摆脱了对专用测量设备的依赖。通过现场实验验证,该系统可以有效辅助电力线载波通信网络进行在线诊断,为改善高速电力线载波本地物联网络通信质量提供有力的支撑。

基于导频结构的电力线载波信道自适应跟踪算法

针对电力线载波信道的线性周期性时变特性,文章基于标准IEEE 1901.1—2018的物理层提出了一种基于导频结构的信道自适应跟踪算法。算法根据导频进行信道估计,并提取信道的加权相位变化,进而计算得到信道变化的度量值;利用信道变化度量值动态调整导频的插入密度。与传统的不借助导频的盲信道跟踪算法不同,文章提出的信道自适应跟踪算法在不同的信噪比区间均能有效地跟踪信道变化,并在保证通信成功率的前提下,动态降低插入导频导致的系统冗余,达到最优的系统吞吐率。