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2018 China International Conference on Electricity Distribution (CICED)最新文献

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Load Cluster Management Considering Response Uncertainty 考虑响应不确定性的负载集群管理
Pub Date : 2018-09-01 DOI: 10.1109/CICED.2018.8592587
Wei Zeng, Minjie Sun, Bo Chen, Wei He, Yangqi Huang, Kansheng Yu
The elastic load on demand side can change with the fluctuation electricity price, so it could be modeled as the adjustable load cluster and involved into power dispatching with traditional generation unit, which can improve the flexibility of the power system. Due to the influence of various factors, such as the response to electricity price is not timely, signal transmission delay, the user's habits is difficult to be changed, and the response amount and expected value always exist in a certain range of deviation. In this paper, the value at risk (VaR) is used to measure the risk loss caused by the uncertainty of the load cluster response, then VaR is introduced as a loss measure to participate in the optimization of the power dispatching model and establish a joint scheduling model. Through the actual example analysis, the results show that, due to the risk loss of the adjustable load cluster is considered, the risk loss caused by uncertainty response is reduced. The research has practical application prospect to the implementation of DSM projects.
需求侧弹性负荷可以随着电价的波动而变化,因此可以将其建模为可调负荷集群,与传统发电机组共同参与电力调度,提高了电力系统的灵活性。由于各种因素的影响,如对电价的响应不及时、信号传输延迟、用户习惯难以改变、响应量与期望值始终存在一定范围的偏差等。本文采用风险值VaR (value at risk)来衡量负荷集群响应的不确定性所带来的风险损失,然后引入VaR作为损失度量参与电力调度模型的优化,建立联合调度模型。通过实例分析,结果表明,由于考虑了可调负荷集群的风险损失,降低了不确定性响应带来的风险损失。本研究对电力需求侧管理项目的实施具有实际应用前景。
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引用次数: 1
Study on Rise of Transient Ground Potential Caused by Switching and Closing Operation in 330kV GIS Substation 330kV GIS变电站开关合闸引起暂态地电位上升的研究
Pub Date : 2018-09-01 DOI: 10.1109/CICED.2018.8592047
Lin Cheng, Yong Zhu, Chuanshen Wang, Wenbo Han, Cheng Zhang, Yingying Wang, Ting Ren, Xiang Liu, Dongxin Hao, Yue Tong, Yang Shen, Yifeng Liang
In this paper, a model of the 330kV GIS substation shell in transient state is established, a simulation calculation about transient enclosure voltage (TEV) generated during switching of disconnector is carried out, and the TEV waveforms and spectral distributions were obtained throughout the shell. The simulation results are compared with the actual experimental data of the substation, and on the basis of verifying the correctness of the simulation calculation, the possible hazards caused by transient elevation of potential to ground are analyzed. The study shows that the maximum value of TEV always appears on the shell of the bushing, which can reach tens kV voltage level and contain complex frequency. At the same time, the transient potential difference between the grounding wire and the grounding terminal of the control room is up to 1000V.
本文建立了330kV GIS变电站外壳暂态模型,对隔离开关切换过程中产生的暂态外壳电压(TEV)进行了仿真计算,得到了整个外壳的TEV波形和频谱分布。将仿真结果与变电站的实际实验数据进行对比,在验证仿真计算正确性的基础上,分析了暂态电势对地升高可能造成的危害。研究表明,TEV的最大值总是出现在套管的外壳上,可达到数十kV的电压级别,且含有复频率。同时,接地线与控制室接地端子之间的暂态电位差最高可达1000V。
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引用次数: 3
Reliability Evaluation of Distribution System Considering Temporal Fluctuation Characteristics of Distributed Energy Sources 考虑分布式能源时间波动特性的配电系统可靠性评估
Pub Date : 2018-09-01 DOI: 10.1109/CICED.2018.8592430
Bo Wang, Wei Guo, Liwei Qiao, Ziqing Zou, Dechun Zang, Yiqing Zhang
With the continuous development of the active distribution network, a large number of distributed energy access brings new challenges to the distribution network power supply reliability. It is particularly important to evaluate the distribution network power supply reliability after the distributed energy access. In this paper, a pseudo-sequential Monte Carlo simulation method is proposed to evaluate the reliability index of distribution network with fans, photovoltaic cells and batteries. The system state is sampled by non-sequential Monte Carlo method. Only the sequential Monte Carlo simulation of the fault process can quickly and accurately obtain the reliability index of the distribution network, which is suitable for large-scale networks after a large number of distributed energy access in the future. In the process of sequential simulation, micro-grid operation, distributed energy use strategy and optimal load shedding strategy are considered simultaneously. IEEE RBTS-BUS6 feeder 4 system simulation verifies the availability of the method and analyzes the impact of distributed energy access on the reliability index of distribution network.
随着有功配电网的不断发展,大量的分布式能源接入给配电网供电可靠性带来了新的挑战。分布式能源接入后的配电网供电可靠性评估显得尤为重要。本文提出了一种伪序贯蒙特卡罗仿真方法,用于评估由风扇、光伏电池和蓄电池组成的配电网的可靠性指标。采用非顺序蒙特卡罗方法对系统状态进行采样。只有对故障过程进行序贯蒙特卡罗模拟,才能快速准确地获得配电网的可靠性指标,适用于未来分布式能源大量接入后的大规模电网。在序贯仿真过程中,同时考虑了微网运行、分布式能源利用策略和最优减载策略。IEEE RBTS-BUS6馈线4系统仿真验证了该方法的有效性,并分析了分布式能源接入对配电网可靠性指标的影响。
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引用次数: 0
Design of Power Supply State Monitoring System for Active Electronic Current Transformer 有源电子电流互感器供电状态监测系统设计
Pub Date : 2018-09-01 DOI: 10.1109/CICED.2018.8592020
Xiong Jun-jun, H. Hua, Deng Xiao-pin, Hubei.
This article designs a power supply status monitoring system in order to verify the reliability of the active electronic current transformer's power supply switching and monitor its power supply status. It is proposed that analyzing the merged unit IEC61850-9-2LE message to obtain primary current and analyzing the merger unit TCP/IP protocol to get the laser power and photo-voltaic cell output voltage. While using a high-power optical splitter to monitor the laser power output directly, thus enabling the active electronic current transformer power supply status monitoring according to its working principle. Through this monitoring system, a certain type of active electronic current transformer is energized state monitoring test verification; the monitoring data can display the current energy status in real time, and gives several common power supply failure alarms. Experiments show that the monitoring system can verify the reliability of power supply switching and realize the alarm of power supply status so as to improve the quality testing capability of active electronic current transformer.
为了验证有源电子式电流互感器电源开关的可靠性,监控其电源状态,本文设计了一种电源状态监测系统。提出通过分析合并单元IEC61850-9-2LE报文获取一次电流,通过分析合并单元TCP/IP协议获取激光功率和光伏电池输出电压。同时采用大功率光分路器直接监测激光功率输出,从而使有源电子电流互感器电源根据其工作原理进行状态监测。通过本监测系统对某型有源电子电流互感器进行了通电状态监测试验验证;监测数据可以实时显示当前电能状态,并给出几种常见的电源故障报警。实验表明,该监控系统能够验证电源开关的可靠性,实现电源状态报警,从而提高有源电子电流互感器的质量检测能力。
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引用次数: 2
Research on a Dynamic Load Power Sharing Method for Distributed Energy Storage System Based on Consensus Algorithm 基于共识算法的分布式储能系统动态负荷功率共享方法研究
Pub Date : 2018-09-01 DOI: 10.1109/CICED.2018.8592504
Zhang Li-zong, Yang Chen, Shen Xiang, Yu Jie, Jin Xueqi
In this paper, a distributed energy storage system in DC micro-grid is investigated and a hierarchical power sharing control strategy based on discrete consensus algorithm is proposed. First, the power output capacity and equivalent SOC evaluation criteria of the asymmetric energy storage units are given. Based on these criteria, dynamic droop control is proposed to allocate the output power of each energy storage unit at the bottom layer. At the same time, considering the weak communication in distributed energy storage system, discrete consensus algorithm is used in the upper layer to dynamically adjust output power of energy storage units in order to reduce the SOC difference between ESUs. Finally, a simulation model is built in Matlab/Simulink to verify the theoretical analysis. It is proved that the proposed method can achieve the optimal distribution of power in distributed energy storage system.
本文以直流微电网中的分布式储能系统为研究对象,提出了一种基于离散共识算法的分级功率共享控制策略。首先,给出了非对称储能单元的输出功率和等效荷电状态评估标准。基于这些准则,提出动态下垂控制,对底层各储能单元的输出功率进行分配。同时,考虑到分布式储能系统中通信较弱的特点,在上层采用离散共识算法动态调整储能单元的输出功率,以减小esu之间的SOC差异。最后,在Matlab/Simulink中建立仿真模型,验证理论分析。实验证明,该方法能够实现分布式储能系统的最优功率分配。
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引用次数: 0
A Centralized Frequency Regulation Strategy of PV Power Plant Based Equal Adjustable Capacity Proportion Mode 基于等可调容量比例模式的光伏电站集中调频策略
Pub Date : 2018-09-01 DOI: 10.1109/CICED.2018.8592563
Minhui Qian, Da-wei Zhao, Jin Ma, D. Jiang, Maosheng Ding, L. Xiang
A centralized frequency regulation strategy of PV plant based on equal adjustable capacity proportion mode is proposed in this paper. When the system frequency changes due to some disturbances, the requirement of adjust active power value is calculated according to the frequency changing, then original active power reference is added with this adjust value to obtain the final active power reference as to change the active power output of PV units to participate in system primary frequency regulation. On this basis, in order to allow all PV units in same PV plant to coordinate with each other, also to prevent some PV units from excessive regulation, a proportional regulation of power method (PROP) is implemented to allocate active power reference to each PV unit more reasonable, namely, each PV unit's output is according to equal adjustable capacity proportion. Finally, an actual PV plant model is established on DIgSILENT PowerFactory platform to verify the effectiveness of the proposed control strategy.
提出了一种基于等可调容量比例模式的光伏电站集中调频策略。当系统频率因某些干扰而发生变化时,根据频率变化计算调整有功功率值的需求,然后将原有功功率基准与该调整值相加,得到最终有功功率基准,以改变光伏机组输出的有功功率,参与系统一次调频。在此基础上,为了使同一光伏电站内的所有光伏机组能够相互协调,也为了防止部分光伏机组过度调节,采用功率比例调节法(PROP),将有功功率参考更合理地分配给各光伏机组,即各光伏机组的出力按相等的可调容量比例分配。最后,在DIgSILENT PowerFactory平台上建立了一个实际的光伏电站模型,验证了所提控制策略的有效性。
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引用次数: 6
Research on Apache Spark Based Transformer Areas Load Forecasting 基于Apache Spark的变压器区域负荷预测研究
Pub Date : 2018-09-01 DOI: 10.1109/CICED.2018.8592094
Qi Hui, Tang Haibo, Feng Wei, Wen Beibei, Wu Qian
The massive data accumulated by the power company provides the basic data profile for load forecasting. In this paper, a dynamic Bayesian network is built as a load forecasting model of transformer areas. The parallel computing platform Apache Spark is used to calculate the parameters of the model based on large volume of transformers' historical data in parallel. Meanwhile, the Pregel computing model is used to parallelize the forward backward algorithm to realize the forecasting tasks. The experimental results show that the proposed transformer areas load forecasting technology based on distributed graph computing has high prediction accuracy and fast calculation speed.
电力公司积累的海量数据为负荷预测提供了基础数据轮廓。本文建立了一个动态贝叶斯网络作为变压器区负荷预测模型。基于大量变压器历史数据,采用并行计算平台Apache Spark对模型参数进行并行计算。同时,利用Pregel计算模型对前向后向算法进行并行化,实现预测任务。实验结果表明,本文提出的基于分布式图计算的变压器区域负荷预测技术具有预测精度高、计算速度快的特点。
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引用次数: 1
Research on Accelerated Address Search Method for Intelligent Distribution Network Equipment Identification and Lookup 智能配电网设备识别与查找的加速地址搜索方法研究
Pub Date : 2018-09-01 DOI: 10.1109/CICED.2018.8592045
Xin Miao
In order to improve the real-time performance of smart distribution network equipment address recognition search, solve the fast address search problem of distribution network intelligent equipment or device or unit, application Fibonacci method for two segments division of the address segment, this paper proposes a quick address search method for identification and lookup of the distribution network equipment. Aiming at the problem of search and query in the MAC (Media Access Control) address, IPv4 (Internet Protocol version 4) address or IPv6 (Internet Protocol version 6) address space of the equipment / device / unit in the distribution network, the computer simulation results show that compared with the midpoint method, the address lookup speed of the method is faster. It can improve the real-time performance of the intelligent perception of the distribution network and speed up the network management response speed of the equipment / device / unit failure in the distribution network. The operation and maintenance performance of the distribution network are improved, and the security and intelligence level of the distribution network system are promoted.
为了提高智能配电网设备地址识别搜索的实时性,解决配电网智能设备或装置或单元的快速地址搜索问题,应用斐波那契方法对地址段进行两段划分,提出了一种快速地址搜索方法来识别和查找配电网设备。针对配电网中设备/装置/单元的MAC (Media Access Control)地址、IPv4 (Internet Protocol version 4)地址或IPv6 (Internet Protocol version 6)地址空间的搜索和查询问题,计算机仿真结果表明,与中点方法相比,该方法的地址查找速度更快。它可以提高配电网智能感知的实时性,加快配电网中设备/装置/机组故障的网管响应速度。提高了配电网的运维性能,提高了配电网系统的安全性和智能化水平。
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引用次数: 2
On Effect of Electrical Double Layer Capacitor Storage Devices on Power Quality in Power System with Electrified Railways 电气化铁路电力系统双层电容储能装置对电能质量的影响
Pub Date : 2018-09-01 DOI: 10.1109/CICED.2018.8592124
Yizheng Xu, Xujiang Chen, Fang Tian, Hongying Peng, Shuchang Yan
Energy storage devices for electrified railway have acquired significant attention from both academia and industry due to its capability of energy saving and conservation. Therefore, models of electrified railways with energy storage devices (ESD) need to be built for investigation on the effect of ESD on traction systems and power networks. This paper assesses the effect of the electrical double layer capacitor (EDLC), one prototype of ESD, on the power quality of the network after installation of EDLC. An integrated electromagnetic transient model composed of the traction substation, the transmission line, the locomotives with control systems, and the energy storage devices with control systems is built in ADPSS based on the topology of the real network and data sheets of the selected EDLC from the manufacturer. The overall power quality at the grid side is analyzed using analytical hierarchy process and compared with that before installation of EDLC to assess the effect of EDLC on power quality. The overall power quality performance can be improved after installation of EDLC.
电气化铁路储能装置以其节能、节约能源的特点受到了学术界和工业界的广泛关注。因此,需要建立具有储能装置的电气化铁路模型,研究储能装置对牵引系统和电网的影响。本文对ESD的一种原型——双电层电容器(EDLC)安装后对电网电能质量的影响进行了评估。在ADPSS中,根据实际网络的拓扑结构和所选择的厂商EDLC的数据表,建立了由牵引变电所、输电线路、机车及控制系统、储能装置及控制系统组成的综合电磁暂态模型。采用层次分析法对电网侧整体电能质量进行分析,并与安装EDLC前的电能质量进行比较,评估EDLC对电能质量的影响。安装EDLC后,整体电能质量性能得到改善。
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引用次数: 0
Research of New Method About the Test of Secondary System for Refurbishment and Extension of Smart Substation 智能变电站改扩建二次系统测试新方法研究
Pub Date : 2018-09-01 DOI: 10.1109/CICED.2018.8592589
Fan Chen, Nie Yi-min, Z. Guoqing, Yuan Hao, Dou Renhui
As the large-scale construction of smart substation, the refurbishment and extension of smart substations become more and more. The state-of-art about the test of the refurbishment and extension of secondary system in smart substation is introduced and the problems and new needs are described. The new test process combined pre-test and on-site test is presented, and the new method about the test is discussed in detail from four aspects which are the configuration and verification of SCD file, the construction of virtual simulation and test platform, the pre-test and the join-test on-site. The security measure for the on-site test is also provided. At last, take the extension of line as an example and make analysis; it will be helpful to the test refurbishment and extension of secondary system in smart substation.
随着智能变电站的大规模建设,智能变电站的翻新和扩建也越来越多。介绍了智能变电站二次系统改扩建试验的现状,指出了其中存在的问题和新的需求。提出了预试验与现场试验相结合的新型试验流程,并从SCD文件的配置与验证、虚拟仿真与试验平台的搭建、预试验与现场联合试验四个方面详细论述了新的试验方法。并提出了现场试验的安全措施。最后,以延长线为例进行分析;对智能变电站二次系统的试验改造和扩建具有一定的指导意义。
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引用次数: 0
期刊
2018 China International Conference on Electricity Distribution (CICED)
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