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2022 5th International Conference on Energy, Electrical and Power Engineering (CEEPE)最新文献

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Multi-objective Dynamic Network Reconstruction Method for Active Distribution Network Including Distributed Generation and Electric Vehicles 包含分布式发电和电动汽车的有源配电网多目标动态网络重构方法
Pub Date : 2022-04-22 DOI: 10.1109/CEEPE55110.2022.9783415
Chunyan Ma, Qing Duan, Haoqing Wang, Yi Mu
A large number of Distributed Generation (DG) access to the distribution network, which changes the power flow distribution of the distribution network, and the randomness of distributed generation and electric vehicle load also brings new problems to the network reconfiguration of the power grid. Aiming at the influence of distributed generation and electric vehicle access on distribution network, this paper aims at reducing node voltage deviation and active power loss, and introduces the optimal concept, using Multi-Objective Genetic Algorithm ( MOGA ) to reconstruct the distribution network. The IEEE33 node example is calculated and analyzed. The results show that this method can obtain a network structure with better steady-state economic operation capability and safe power supply capability.
大量的分布式发电接入配电网,改变了配电网的潮流分布,分布式发电和电动汽车负荷的随机性也给电网的网络重构带来了新的问题。针对分布式发电和电动汽车接入对配电网的影响,以降低节点电压偏差和有功功率损耗为目标,引入优化概念,采用多目标遗传算法(MOGA)对配电网进行重构。对IEEE33节点算例进行了计算和分析。结果表明,该方法可获得具有较好稳态经济运行能力和安全供电能力的电网结构。
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引用次数: 0
Extraction Steam Flow-generator Power Modeling and Its Application in Wind Power Consumption 抽汽流发生器功率建模及其在风电消纳中的应用
Pub Date : 2022-04-22 DOI: 10.1109/CEEPE55110.2022.9783289
Libin Wen, Hong Hu, Jun Li, Zhiyuan Sun, Yihui Zhang, Jianxu Wu
Due to the randomness and volatility of wind power, the regulation capacity of power system is insufficient after large-scale grid connection. After the heating transformation of pure condensing thermal power unit, its regulating capacity has changed significantly. Therefore, the technical research of test and theoretical modeling is carried out. The minimum power value of the generator under steam extraction condition is tested through the test, and then the maximum output power value of the generator is obtained by considering the power loss caused by steam extraction. In this way, the steam extraction flow electric power model is obtained to calculate the regulating capacity in real time. According to the online visible regulation capacity, this can guide the stable operation of the power grid. This can be used for reference to promote the development of wind power.
由于风电的随机性和波动性,大规模并网后电力系统的调节能力不足。纯冷凝式火电机组经过供热改造后,其调节能力发生了较大变化。为此,开展了试验和理论建模的技术研究。通过试验测试出抽汽工况下发电机的最小功率值,然后考虑抽汽造成的功率损失,得到发电机的最大输出功率值。通过这种方法,得到了抽汽流量电功率模型,可以实时计算调节能力。根据在线可见调节容量,可以指导电网的稳定运行。这对推动风电的发展具有一定的借鉴意义。
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引用次数: 0
Automatic Parameter Optimization Based on High-Efficiency Simulation Model of Regional Energy Router 基于区域能源路由器高效仿真模型的参数自动优化
Pub Date : 2022-04-22 DOI: 10.1109/CEEPE55110.2022.9783429
Shuxian Yi, Rui Chen, Xiaofei Wang, Tianzhi Cao, Li Zheng
In order to promote the penetration of distributed renewable energy and the hybrid connection of AC and DC distribution network, regional energy router is proposed. By integrating regional energy router into smart distribution network, safe and stable economic network operation can be better realized. However, traditional manual design and parameter optimization method have faced many difficulties such as low efficiency and large quantity of manpower. This paper proposed an automatic parameter optimization method based on high-efficiency simulation model of regional energy router. By using genetic algorithm (GA) and integral of time multiplied by squared error criterion (ITSE), efficient and fast parameter optimization can be achieved. Proposed parameter optimization method has been verified based on simulation of a four-port 10kV/1MW regional energy router.
为了促进分布式可再生能源的普及和交直流配电网的混合接入,提出了区域能源路由器。通过将区域能源路由器集成到智能配电网中,可以更好地实现电网安全稳定的经济运行。然而,传统的人工设计和参数优化方法面临着效率低、人力量大等诸多困难。提出了一种基于区域能源路由器高效仿真模型的参数自动优化方法。采用遗传算法(GA)和时间乘误差平方积分准则(ITSE),可以实现高效、快速的参数优化。基于四端口10kV/1MW区域能量路由器的仿真验证了所提出的参数优化方法。
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引用次数: 0
A Configuration Planning Method of Mobile Energy Storage in Various Scenarios 多种场景下移动储能的配置规划方法
Pub Date : 2022-04-22 DOI: 10.1109/CEEPE55110.2022.9783288
Hongzhou Chen, Jizhong Zhu, Xiaofu Xiong, Jian Wang, Wei Wang, Junjie Cheng
Energy storage technology already has the potential advantages of being mobile, modular, and "plug and play". The results of existing energy storage planning of the Distribution Network (DN) are energy storage configurations with fixed access points and capacity. There is still a lot of room for the flexibility and value of energy. With many renewable energies distributed generation (DG) connected to the distribution network, it can be divided into different operating scenarios according to the seasonality of distributed power and loads in the distribution network. This paper proposes a Mobile Energy Storage (MES) configuration planning method of the DN. Through this method, the MES devices are dynamically allocated between different operating scenarios of the DN regarding the varying load demands as well as DG outputs. The access points, capacities and operation modes of MES devices in various scenarios are taken as the decision variables, the maximum comprehensive economic benefit brought by MES is taken as the objective, and thus the mixed-integer second-order cone programming(MISOCP) model for MES configuration is constructed. Case studies are performed in the modified IEEE 33-node distribution systems. The feasibility and effectiveness of the proposed method are verified The proposed method can be treated as a useful expansion to the flexible operation of energy storage device, through which the MES can well service for various operating scenarios of the DN and thus its value can be fully developed.
储能技术已经具有移动、模块化和“即插即用”的潜在优势。现有配电网储能规划的结果是具有固定接入点和容量的储能配置。能源的灵活性和价值仍有很大的空间。随着众多可再生能源分布式发电机组接入配电网,可根据配电网中分布式电力和负荷的季节性,将其划分为不同的运行场景。提出了一种DN的移动储能(MES)配置规划方法。通过该方法,MES设备可以根据不同的负载需求和DG输出在DN的不同运行场景之间动态分配。以MES设备在不同场景下的接入点、容量和运行方式为决策变量,以MES带来的最大综合经济效益为目标,构建了MES配置的混合整数二阶锥规划(MISOCP)模型。在改进的IEEE 33节点配电系统中进行了案例研究。验证了所提方法的可行性和有效性,可将所提方法视为对储能装置灵活运行的有益拓展,使MES能够很好地服务于DN的各种运行场景,从而充分发挥其价值。
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引用次数: 0
A Second-Order Cone Relaxation Based Method for Optimal Power Flow of Meshed Networks 基于二阶锥松弛的网格网络最优潮流求解方法
Pub Date : 2022-04-22 DOI: 10.1109/CEEPE55110.2022.9783365
Yuwei Chen, Bingqing Xia, Chenggen Xu, Qing Chen, Zhaohui Shi, Songge Huang
Due to the stability consideration of power systems, the meshed topology of the network has become common. This paper proposes a second-order cone relaxation based method for the optimal power flow problem of meshed networks. The method imposes four sets of second-order cone relaxations to convexify the non-convex power flow constraints. Besides, the convex concave procedure with penalty has been implemented to prompt exact relaxations. Within few times of iterations, a feasible solution which is near the global optimum can be obtained. The superiority of the proposed approach has been tested over the case study.
出于对电力系统稳定性的考虑,电网的网状拓扑结构已成为一种常见的拓扑结构。本文提出了一种基于二阶锥松弛的网格网络最优潮流问题求解方法。该方法利用四组二阶锥松弛来对非凸潮流约束进行凸化。此外,还实现了带惩罚的凸凹过程,以提示精确的松弛。在很少的迭代次数内,可以得到接近全局最优的可行解。该方法的优越性已通过案例研究得到验证。
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引用次数: 1
Data-Driven Small-Signal Stability Boundary Based on Damping Ratio Sensitivity 基于阻尼比灵敏度的数据驱动小信号稳定边界
Pub Date : 2022-04-22 DOI: 10.1109/CEEPE55110.2022.9783438
Xin Cun, Rong Yan, Guangchao Geng, Q. Jiang
Small-signal stability boundary (SSSB) plays a significant role in operation and control in power system. The small-signal stability is able to assessed quickly and improved by the useful information of SSSB. While SSSB generation faces plenty of challenges in existing methods, such as high computation complexity, massive operating points (OPs) and contingencies should be considered. The proposed paper proposes a data-driven method to generate the stability boundary, by quickly sampling as many as possible the OPs which the damping ratio of its are close to the stability boundary with critical N-1 contingencies. To achieve this goal, a sample method with the self-adapting step size based on the damping ration sensitivity and critical contingencies selection based on the network theory are proposed in this paper. The effectiveness of the proposed method is demonstrated by IEEE 9-bus system and NESTA 162-bus system.
小信号稳定边界在电力系统的运行和控制中起着重要的作用。利用SSSB的有用信息,可以快速评估和提高系统的小信号稳定性。而现有的SSSB生成方法面临着计算复杂度高、操作点多和偶然性等诸多挑战。本文提出了一种数据驱动的方法,通过快速采样尽可能多的其阻尼比接近稳定边界且具有临界N-1偶然性的OPs来生成稳定边界。为了实现这一目标,本文提出了一种基于阻尼比灵敏度和基于网络理论的临界事件选择的自适应步长样本方法。通过IEEE 9总线系统和NESTA 162总线系统验证了该方法的有效性。
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引用次数: 0
Distributionally Robust Energy Management of Multi-microgrid System with Uncertainty 不确定多微网系统的分布式鲁棒能量管理
Pub Date : 2022-04-22 DOI: 10.1109/CEEPE55110.2022.9783408
Zhichao Shi, Tao Zhang, Yajie Liu, Rui Wang, Shengjun Huang
With the increasing penetration of renewable generation into power system, the energy management of multi-microgrid (MMG) system has become an important problem. In this paper, a bi-level distributionally robust energy management model for MMG system with uncertain renewable generation is proposed. The distribution system operator (DSO) and each microgrid (MG) are considered as different entities with various objectives. In each MG, the Wasserstein distance based ambiguity set is utilized to describe the uncertain distribution of renewable generation. Due to the coupling power exchange, the alternating direction method of multipliers (ADMM) is applied to solve the problem in a decentralized manner. For individual MG energy management, the column and constraint generation (CCG) algorithm is used to solve it. Simulation experiments are carried out to validate the effectiveness of the proposed model based on a modified IEEE 33-bus system with three MGs.
随着可再生能源发电在电力系统中的日益普及,多微网系统的能量管理已成为一个重要问题。针对具有不确定可再生能源发电的MMG系统,提出了一种双层分布式鲁棒能量管理模型。分配系统运营商(DSO)和每个微电网(MG)被视为具有不同目标的不同实体。在每个MG中,使用基于Wasserstein距离的模糊集来描述可再生能源发电的不确定分布。由于功率交换的耦合性,采用乘法器的交变方向法(ADMM)以分散的方式解决了该问题。对于单个MG能量管理,采用列约束生成(CCG)算法求解。仿真实验验证了该模型的有效性,该模型基于改进的IEEE 33总线系统,具有三个mg。
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引用次数: 0
Sizing of Battery Energy Storage for Wind Integration: Considering Frequency Regulation and Peak Load Shaving 风电一体化电池储能规模:考虑频率调节和调峰
Pub Date : 2022-04-22 DOI: 10.1109/CEEPE55110.2022.9783344
Yan Cheng, P. Yu, Shumin Sun, Nan Wang, Yuanhang Zhang, Peng Kou
The development of modern power system is accompanied by many problems. The growing proportion of wind generation in power grid gives rise to frequency instability problem. The increasing load demand in power grid worsens the load peak-to-valley difference problem. Battery Energy Storage System (BESS) has the capability of frequency regulation and peak load shaving, but its high economic costs need to be taken into consideration. To address this issue, this paper proposes a sizing strategy for BESS with wind integration under the condition of frequency regulation and peak load shaving. In the case of eliminating frequency deviations, the sizing of BESS is decided by the approximated Laplace distribution based on wind power prediction errors. As for peak load shaving, the load interval control method is used for the sizing of BESS. Simulation results demonstrate the effectiveness of the proposed scheme.
现代电力系统的发展伴随着许多问题。风力发电在电网中所占比重的不断增大,引起了电网频率失稳问题。随着电网负荷需求的不断增长,负荷峰谷差问题日益严重。电池储能系统(BESS)具有调频和调峰能力,但其经济成本较高。针对这一问题,本文提出了一种调频调峰条件下带风集成的BESS分级策略。在消除频率偏差的情况下,BESS的规模由基于风电预测误差的近似拉普拉斯分布决定。在调峰负荷方面,采用负荷区间控制方法对BESS进行调节。仿真结果验证了该方案的有效性。
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引用次数: 2
Research on Optimization of Line Loss of Distribution Network Based on Genetic Algorithm 基于遗传算法的配电网线损优化研究
Pub Date : 2022-04-22 DOI: 10.1109/CEEPE55110.2022.9783383
Lingyi Li, Chunwei Wang, Yueming Li, Shujian Zhao, Xinya Wang, Siyu Han
In this paper, An artificial intelligence algorithm-genetic algorithm is adopted. Through the improvement of the genetic algorithm, the grid reconfiguration of the distribution network is carried out, and the optimal grid structure under the constraint conditions is sought, and finally the line loss is minimized under the normal operation of the grid. Achieve the effect of reducing line loss and increase corporate efficiency.
本文采用了一种人工智能算法——遗传算法。通过对遗传算法的改进,对配电网进行电网重构,寻求约束条件下的最优电网结构,最终使电网正常运行下的线损最小。达到降低线损,提高企业效率的效果。
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引用次数: 0
Optimal Charging Scheduling for Household Electric Vehicles under TOU Prices 分时电价下家用电动汽车最优充电计划
Pub Date : 2022-04-22 DOI: 10.1109/CEEPE55110.2022.9783267
Ruoyun Hu, Qi Ding, Qingjuan Wang, Ran Shen, Yifan Wang, Taoyi Qi
With the development of the Electric Vehicle (EV), the charging demand increases rapidly. To release the electricity supply pressure, time of use price is implemented in some cities to transfer the charging demand of household EVs from peak period to valley period. However, plenty of EVs choose to charge intensively at the beginning of valley period, which causes a new load peak and wastes the potential of peak shaving and valley filling. To address the problem, this paper proposed the optimal charging scheduling strategy for household EVs under time of use price. Firstly, the charging model and process of the EV are developed to describe the various charging demands accurately. Subsequently, EVs with optimization potential are screened to improve the efficiency of time scheduling. In order to shorten the peak-valley difference of the residential load, the charging periods of EVs are optimized utilizing the genetic algorithm. Finally, based on the actual data of residential load and EVs, the time scheduling simulation is studied to show the optimization performance. By making full use of the peak-shaving and valley-filling capacity of EVs, the simulation results proved the effectiveness of the proposed method on charging time scheduling, the peak load caused by centralized charging demands decreased. Besides, the residential power during the peak period is effectively reduced and the power during the valley period is improved.
随着电动汽车的发展,充电需求迅速增长。为缓解电力供应压力,部分城市实行分时电价,将家用电动汽车的充电需求从高峰时段转移到低谷时段。然而,大量电动汽车选择在谷期开始时密集充电,从而产生新的负荷峰值,浪费了调峰和填谷的潜力。针对这一问题,提出了基于时间电价的家用电动汽车最优充电调度策略。首先,建立了电动汽车的充电模型和过程,以准确描述各种充电需求;随后,筛选具有优化潜力的电动汽车,提高时间调度效率。为了缩短住宅负荷峰谷差,利用遗传算法对电动汽车充电周期进行优化。最后,基于住宅负荷和电动汽车的实际数据,进行了时间调度仿真研究,验证了优化后的性能。仿真结果表明,通过充分利用电动汽车的调峰充谷能力,所提出的充电时间调度方法是有效的,降低了集中充电需求带来的峰值负荷。有效地降低了高峰时段的居民用电,提高了低谷时段的居民用电。
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引用次数: 0
期刊
2022 5th International Conference on Energy, Electrical and Power Engineering (CEEPE)
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