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利用传统方法进行主动式配电网规划时,受小截面线路的影响,无法进行负荷聚类分块,在负荷增长率为32.98%~47.98%的范围内,存在供电网格负荷较高的问题,因此提出一种基于三维视频编码的主动式配电网网格化规划方法。以元胞历史数据为配电网负荷密度指标,进行配电网负荷预测,并通过冗余网格负荷聚类动态减少算法来划分配电网的供电区块,实现迅速、合理的负荷聚类分块;基于三维视频编码控制对配电网网格进行深度图编码控制,以实现配电网网格的分类,并结合配电网的设备选型、电网结构、通信系统、配电自动化等要求设计标准化网格,实现配电网网格化规划。为测试该方法在上述负荷增长率范围内的供电网格负荷,进行对比实验,实验结果证明,该方法的供电网格负荷始终较低,实现了配电网负荷性能的突破。 相似文献
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提出了一种计及快充负荷的低压直流互联配电网多时间尺度协同经济调度方法。以交、直流配电网的总运行成本最小为目标函数,建立了配电网设备模型、二阶锥潮流模型和配网重构模型;依据设备灵活度的不同,提出了日内-日前-实时的多时间尺度协同调度方法,以满足不同的控制需求。采用44节点交直流配电网算例,并讨论分析了不同场景下的调度结果及经济成本,验证了多时间尺度经济调度方法的有效性。 相似文献
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配网设备在供电环节起着至关重要的作用,设备的状态监测及运维检修直接影响配网供电质量和稳定性,而配网变压器是配网设备中非常重要的部分,其运行可靠性很大程度上决定了电网运行的安全性。供电企业越来越关注供电保障与稳定性,以提升用户的用电质量,而传统的数据分析模式已无法满足规模日益增大的配电网规模。主要针对目前配变在线状态监测功能的状况及配变设备运维的重要性,设计网格化区域管理方式,基于设备主人的运维理念,强化设备主人对现场设备的负荷、环境监控和隐患消除能力,结合负荷预警和智能告警,改善目前处理配变设备异常的被动应对状况。 相似文献
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当前,在社会生产、生活中,用电设备的种类、数量都在不断增加,对于电力系统的供电效率与供电质量均有了更高要求。而配电网是电力系统中的一个重要组成,肩负着向广大用户提供电力的重任,只有确保配电网规划足够科学合理,才能更好地满足用户用电需求。本文首先分析智能配电网的概念及组成,其次基于配电网运行管理现状,从几个方面深入说明智能配电网技术在配电网规划中的实践应用,以供参考。 相似文献
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随着主动配电网技术的不断发展,其可调设备种类和数量都迅速增加,包含有载调压变压器、并联电容器组、分布式发电以及储能等多种资源。以配电网运行经济性为目标,建立了配电网日前有功-无功联合调度模型,通过调用其大量有功-无功资源实现配电网的运行优化。结合优化理论最新进展,利用分段线性逼近方法对原始模型进行松弛,以提高求解效率。搭建改进的IEEE 33节点系统进行算例分析,验证了所提有功-无功联合调度模型以及求解算法的有效性。 相似文献
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含分布式发电并网的主动配电网作为智能电网的发展方向,其规划方法是一门重要课题。文章针对包含风力发电、光伏发电、可控微电源和储能设备并网的主动配电网规划问题,计及系统运行风险评估建立其优化规划模型。以主动配电网内设备配置容量为优化控制变量,分别以系统综合规划成本最小、系统运行风险指标最低为子目标,将权重系数转化为单目标函数,建立计及系统运行风险评估的主动配电网多目标规划模型。最后通过仿真算例表明,由主动配电网规划模型规划得到的配电网兼顾了经济性和可靠性,而更适用于实际运行情况,能够在减少系统规划成本的前提下,充分降低运行风险指标。 相似文献
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Xiaoou Liu 《国际能源研究杂志》2020,44(6):4888-4909
In the energy station and distribution network collaborative planning of integrated energy system (IES), it is difficult to consider station and network interaction in IES operation at the same time. For resolving this problem, the model and solution of planning and operation alternative optimization are proposed considering multiagent interest balance. First, the three-stage optimization framework and model of station and network planning of IES are proposed based on the operation scheduling of IES and the response of energy station and users as different subjects, aiming at optimization of station and network cost-effectiveness, respectively. Second, the distribution network simplification method is proposed based on topological equivalence principle. The topological structure characteristics of distribution network is analyzed, the rapid generation strategy of single tie line network based on broken circle method is proposed, and then an encoding/decoding scheme is proposed based on particle swarm optimization algorithm. Third, considering the load characteristics and energy station demand response based on flexible comfort level of users, a dynamic spot price optimization method and operation strategy of IES are proposed. And then the station and network collaborative planning solution is presented based on the operation optimization of IES. Finally, an example is given to verify the practicability and effectiveness of the proposed method in this paper. 相似文献
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《全球能源互联网(英文)》2020,3(4):346-354
As renewable energy resources increasingly penetrate the electric grid, the inertia capability of power systems has become a developmental bottleneck. Nevertheless, the importance of primary frequency response (PFR) when making generation-expansion plans has been largely ignored. In this paper, we propose an optimal generation-expansion planning framework for wind and thermal power plants that takes PFR into account. The model is based on the frequency equivalent model. It includes investment, startup/shutdown, and typical operating costs for both thermal and renewable generators. The linearization constraints of PFR are derived theoretically. Case studies based on the modified IEEE 39-bus system demonstrate the efficiency and effectiveness of the proposed method. Compared with methods that ignore PFR, the method proposed in this paper can effectively reduce the cost of the entire planning and operation cycle, improving the accommodation rate of renewable energy. 相似文献
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《全球能源互联网(英文)》2021,4(1):39-47
The integrated energy system (IES) is an important energy supply method for mitigating the energy crisis. A station-and-network–coordinated planning method for the IES, which considers the integrated demand responses (IDRs) of flexible loads, electric vehicles, and energy storage is proposed in this work. First, based on load substitution at the user side, an energy-station model considering the IDR is established. Then, based on the characteristics of the energy network, a collaborative planning model is established for the energy station and energy network of the IES, considering the comprehensive system investment, operation and maintenance, and clean energy shortage penalty costs, to minimize the total cost. This can help optimize the locations of the power lines and natural gas pipelines and the capacities of the equipment in an energy station. Finally, simulations are performed to demonstrate that the proposed planning method can help delay or reduce the construction of new lines and energy-station equipment, thereby reducing the investment required and improving the planning economics of the IES. 相似文献
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为了改善分布式电源与电动汽车的接入对电网安全性、经济性和电能质量的不良影响。考虑风力资源的随机波动性、电动汽车充电需求、分时电价等,以配电系统投资运行成本、有功损耗和电压质量为规划目标,建立了基于机会约束规划的优化配置模型,采用改进遗传算法进行求解。以IEEE33节点配电系统为例,验证了所提模型和算法的有效性。仿真分析表明,将电压质量纳入规划目标,能够以较小的经济成本保证较好的电能质量,考虑输出功率不确定性等因素,得到的规划方案具有较好的经济性。 相似文献
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