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2021 6th Asia Conference on Power and Electrical Engineering (ACPEE)最新文献

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The Simulation Comparative Study of Traction Network Harmonic Characteristic of Three Kinds of AT Power Supply modes 三种AT供电方式牵引网络谐波特性的仿真比较研究
Pub Date : 2021-04-01 DOI: 10.1109/ACPEE51499.2021.9437023
Quancun Nie, Mingxing Tian, Lijun Sun, Haiyan Wang
AT power supply mode is widely used in high-speed railway. This paper introduces three kinds of AT power supply modes, and combined with the current situation of the harmonic problems in traction network caused by the mixed running of AC-DC electric locomotive and AC-DC-AC EMU, carries out the simulation comparative study on the harmonic characteristics of traction network of multi-vehicle mixed running lines under three kinds of AT power supply modes. Taking SS6B locomotive and CRH2 EMU, which are widely used in the actual situation at present, for examples, the interactive simulation model between the vehicle and traction network is established by using Matlab/Simulink simulation software. Through the simulation analysis of the harmonic characteristics of SS6B electric locomotive and CRH2 EMU, the correctness of the comparison conclusion in this paper is verified. On the basis of the vehicle network interactive simulation model, the harmonic characteristics of the traction network under different traction network lengths, different locomotive positions and different locomotive working conditions of three AT power supply modes were compared and analyzed. The study results show that the vehicle network interactive simulation model established by the three AT power supply modes can accurately reflect the influence of AC-DC locomotive mixed running on the harmonic characteristics of traction network.
AT供电方式广泛应用于高速铁路。介绍了三种AT供电方式,结合交直流电力机车和交直流动车组混运引起的牵引网络谐波问题的现状,对三种AT供电方式下多车混运线路牵引网络的谐波特性进行了仿真比较研究。以目前实际应用较为广泛的SS6B机车和CRH2动车组为例,利用Matlab/Simulink仿真软件,建立了车辆与牵引网络的交互仿真模型。通过对SS6B型电力机车和CRH2型动车组谐波特性的仿真分析,验证了本文对比结论的正确性。在整车网络交互仿真模型的基础上,对比分析了三种AT供电方式在不同牵引网长度、不同机车位置和不同机车工况下牵引网络的谐波特性。研究结果表明,采用三种AT供电方式建立的车网交互仿真模型能够准确反映交直流机车混运对牵引网络谐波特性的影响。
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引用次数: 0
Workload Modelling Method of Edge Computing Terminals for Distribution Service Under Power Internet of Things 电力物联网下配电服务边缘计算终端工作量建模方法
Pub Date : 2021-04-01 DOI: 10.1109/ACPEE51499.2021.9436893
Guozheng Huang, Gang Chen, Jin Yi, Mengzhe Huang, Yijia Zhang
Edge computing terminals realize the decoupling between software and hardware, extend the functions of the terminals and meet the needs of diversified distribution service under Power Internet of Things. Workload modeling is the basis of computing resource configuration for edge computing terminals. Thus, this paper proposes a workload modeling method of edge computing terminals for distribution service. According to the timing logic of distribution service, the service is decomposed into several tasks and the sequential logic diagram is constructed. In the sequential logic diagram, directed edges are used to represent the dependency of the tasks. Combining the internal architecture of the edge computing terminals with the sequential logic diagram, the mathematical workload model is formulated. Based on the formulated models, a workload curve generation algorithm is proposed to obtain the computing resource demand of distribution service. Finally, the computing resources of the edge computing terminal are configured according to workload curve. Simulation results verify the effectiveness of the proposed model and method.
边缘计算终端实现了软硬件的解耦,扩展了终端的功能,满足了电力物联网下多样化配电服务的需求。工作负载建模是边缘计算终端计算资源配置的基础。为此,本文提出了一种面向分布式服务的边缘计算终端工作负载建模方法。根据分布式服务的时序逻辑,将分布式服务分解为多个任务,构造时序逻辑图。在顺序逻辑图中,有向边用于表示任务的依赖性。结合边缘计算终端的内部架构和顺序逻辑图,建立了数学负载模型。在建立模型的基础上,提出了一种负载曲线生成算法来获取分布式服务的计算资源需求。最后,根据负载曲线对边缘计算终端的计算资源进行配置。仿真结果验证了所提模型和方法的有效性。
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引用次数: 1
Study on Controllable MOA in 750kV System to Cancel Closing Resistor of Circuit Breakers 750kV系统中取消断路器合闸电阻的可控MOA研究
Pub Date : 2021-04-01 DOI: 10.1109/ACPEE51499.2021.9436983
B. Han, Z. Xiang, Xiu-juan Chen, L. Ban
This paper studied the use of controllable metal oxide arrester (MOA) to cancel closing resistors of circuit breakers in 750kV system. The principle diagram and control strategy of controllable MOA was introduced. Based on typical system conditions, the limitation effect of controllable MOA on closing overvoltage was studied. The influence of parameters of controllable MOA on overvoltage limitation effect was analyzed. The parameter configuration of controllable MOA for different line length to cancel closing resistor of the circuit breaker was proposed. The energy consumption and power frequency voltage withstand of the controllable MOA under different operating and fault conditions were studied.
本文研究了在750kV系统中使用可控金属氧化物避雷器(MOA)来消除断路器合闸电阻。介绍了可控MOA的原理图和控制策略。基于典型系统条件,研究了可控MOA对合闸过电压的限制作用。分析了可控MOA参数对过电压限制效果的影响。提出了不同线路长度的可控MOA参数配置,以抵消断路器的合闸电阻。研究了可控MOA在不同运行工况和故障工况下的能耗和工频耐压。
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引用次数: 0
Coordinative Optimization Operation on the Gas-Electricity Integrated Energy Systems 气电一体化能源系统的协调优化运行
Pub Date : 2021-04-01 DOI: 10.1109/ACPEE51499.2021.9437132
Chen Wang, Siyun Yan, Ruifan Shao, Dengji Zhou, Luyao Xu
Integrated energy system (IES) can improve energy efficiency and optimize energy structure. Due to the similarity and coupling between electric power system and gas network, Gas-electricity integrated energy systems (GEIES) has always been the key research direction of integrated energy system. The optimization of electric power system and gas network is usually independent, the benefits of coordinative optimization are unclear. In this paper, an GEIES model is presented, which is optimized with the goal of maximum revenue under reasonable constraints. The case study shows that the coordinative optimization of GEIES can effectively improve the revenue. Coordinative optimization can increase the earning of electric power system and gas network by about 5% in the model.
综合能源系统可以提高能源效率,优化能源结构。由于电力系统与燃气网络的相似性和耦合性,气电集成能源系统一直是集成能源系统的重点研究方向。电力系统和燃气网络的优化通常是独立的,协同优化的效益不明确。本文提出了在合理约束下以收益最大化为目标进行优化的GEIES模型。实例研究表明,GEIES的协调优化可以有效地提高收益。在模型中,协调优化可使电力系统和燃气网络的收益增加约5%。
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引用次数: 1
Energy Production Element Planning of Integrated Gas and Power systems Considering the Coordination between Economic and Reliability 考虑经济性与可靠性协调的气电一体化系统能源生产单元规划
Pub Date : 2021-04-01 DOI: 10.1109/ACPEE51499.2021.9436885
Xueyong Tang, Ning Luo, Xin He, Minglei Bao, Wenxia Liu, Zhen Li
To guarantee the reliable operation of integrated gas and system, it is essential to consider the reliability issues in the system planning. Considering that, this paper proposes the energy production element planning model of integrated gas and power systems considering the coordination between economic and reliability. Firstly, the reliability models of generating units and gas wells are proposed considering the failure characteristics. On this basis, the reliability constraints of IGPSs are developed considering the impacts of gas contingency on EPS operation. Furthermore, the economy-reliability-coordinated planning model is proposed to determine the deployment of gas storage and power units. The developed model is to minimize the total cost including investment cost, operating cost and load curtailment cost considering the operating constraints and reliability constraints of IGPSs. Finally, the test system composed of IEEE 30-node power system and Belgium 20-node natural gas system is utilized to verify the effectiveness of the model.
为了保证燃气综合系统的可靠运行,必须在系统规划中考虑可靠性问题。为此,本文提出了考虑经济性与可靠性协调的气电一体化系统产能元规划模型。首先,建立了考虑失效特征的发电机组和气井可靠性模型;在此基础上,考虑燃气突发事件对EPS运行的影响,建立了igps的可靠性约束。在此基础上,提出了经济-可靠性协调规划模型,以确定储气机组和发电机组的部署。该模型考虑了igps的运行约束和可靠性约束,以使包括投资成本、运行成本和减载成本在内的总成本最小。最后,利用IEEE 30节点电力系统和比利时20节点天然气系统组成的测试系统验证了模型的有效性。
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引用次数: 0
The research of PET based on the improved virtual inertia control strategy 基于改进虚拟惯性控制策略的PET研究
Pub Date : 2021-04-01 DOI: 10.1109/ACPEE51499.2021.9436843
Sibo Wang, Lei Zhang, Jingyan Bai, Lin Yue
In view of the problem of power grid frequency fluctuation when load switching and renewable output power changed based on the Power electronic interface high respond speed character, a modified virtual inertia control control strategy has been applied to the output stage at Power Electronic Transformer(PET). The power support based on the virtual inertia is achieved and makes the energy internet flexible based on the construction of energy router. The control of MMC circuit at the input level in PET adopted virtual synchronous generator control strategy and the isolation level adopts traditional phase shift control. The advantage of proposed strategy is verified by the MATLAB/SIMULINK simulation.
针对电力电子接口高响应速度特性导致负荷切换和可再生输出功率变化时电网频率波动的问题,将改进的虚拟惯性控制策略应用于电力电子变压器(PET)的输出级。在构建能源路由器的基础上,实现了基于虚拟惯性的电力支撑,使能源互联网具有灵活性。PET中MMC电路的输入电平控制采用虚拟同步发电机控制策略,隔离电平采用传统的相移控制。通过MATLAB/SIMULINK仿真验证了所提策略的优越性。
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引用次数: 0
Research on Faulty Section Location Method for Active Distribution Network 有功配电网故障区段定位方法研究
Pub Date : 2021-04-01 DOI: 10.1109/ACPEE51499.2021.9437099
X. Wen, G. Zou, Chenghan Zhou, Liangzhi Sun, Xiaogong Du
The integration of distributed generators (DGs) changes the fault characteristics when a fault occurs in the feeder of distribution network, which makes the traditional faulty section location (FSL) method not applicable. In response to this problem, by analyzing the positive sequence fault component (PSFC) of current in distribution network with different types of DGs, a novel differential protection method is proposed in this paper. This method can adapt to the needs of FSL in different scenarios with high sensitivity. And it is not affected by the fault ride-through current. Finally, a simulation model is constructed in PSCAD/EMTDC to verify the validity of the proposed method.
分布式发电机的集成改变了配电网馈线发生故障时的故障特征,使得传统的故障段定位方法不再适用。针对这一问题,本文通过对配电网中不同类型dg的电流正序故障分量(PSFC)的分析,提出了一种新的差动保护方法。该方法具有较高的灵敏度,能够适应不同场景下FSL的需求。并且不受故障穿通电流的影响。最后,在PSCAD/EMTDC中建立了仿真模型,验证了所提方法的有效性。
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引用次数: 0
Evaluation Index System of Power Grid Corporation's Operation Benefits Based on Future Low-Carbon Energy Framework 基于未来低碳能源框架的电网公司运营效益评价指标体系
Pub Date : 2021-04-01 DOI: 10.1109/ACPEE51499.2021.9437008
Tianbin Liu, Weigang Jin, Zhaoyang Xiang, Hongkun Chen
Structural changes which have taken place in both the power supply side and the load side of the power grid and a new round of power market reform jointly make operation benefits become a growing concern. New methods are required for operation benefits evaluation under the future low-carbon energy framework. In this paper, a feasible and comprehensive evaluation index system of operation benefits is proposed. Firstly, an index-based evaluation criterion is established to evaluate the operation benefits on reliability level, intelligence level, power marketization level, economic benefits, environmental benefits, and social benefits. Next, a mathematical evaluation method is proposed based on the indexes. The analytic hierarchy process (AHP) and the anti-entropy weight method (AEWM) are used to calculate the combination weights of indexes. The proposed evaluation index system can be used to evaluate the operation benefits of power grid under the future low-carbon energy framework. Furthermore, it can also be utilized to compare the pros and cons of different grid operation planning schemes in China.
电网供电侧和负荷侧的结构性变化以及新一轮电力市场化改革的共同作用,使得运营效益日益受到人们的关注。未来低碳能源框架下的运行效益评估需要新的方法。本文提出了一种可行的、综合的经营效益评价指标体系。首先,建立了基于指标的评价标准,从可靠性水平、智能化水平、电力市场化水平、经济效益、环境效益和社会效益四个方面对运行效益进行评价。其次,提出了一种基于指标的数学评价方法。采用层次分析法(AHP)和反熵权法(AEWM)计算各指标的组合权重。该评价指标体系可用于评价未来低碳能源框架下电网的运行效益。此外,它还可以用于比较中国不同电网运行规划方案的优缺点。
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引用次数: 1
Estimation of Chiller Electric Power of Central Air Conditioner using Feedforward Neural Network 基于前馈神经网络的中央空调制冷机功率估计
Pub Date : 2021-04-01 DOI: 10.1109/ACPEE51499.2021.9437087
Dingyi Cheng, Dong Yang, Huan Ma, Meng Liu, Yan Zhang, Qiao Fang
With the development of technology, the proportion of renewable energy with stochastic and intermittent characteristic, like wind power, photovoltaic power, is higher and higher in generation side, which results in the controllability of power generation decreases. And accordingly, the potential of demand response receives attention. Central air conditioning loads are suitable for demand response for their high proportion in load and large heat inertia. And accordingly, the power estimation of chiller of central air conditioner is essential. However, the control technique of chiller is trade secret for central air conditioner company. In this paper, a novel power estimation method of chiller using feedforward neural network is proposed. Furthermore, central air conditioning loads are explored to participate in AGC control of power system according to the estimated chiller power. Experiment and simulation results verify the effectiveness of the proposed method.
随着技术的发展,风电、光伏等具有随机间歇性特征的可再生能源在发电侧所占比例越来越高,导致发电的可控性下降。因此,需求响应的潜力受到关注。中央空调负荷在负荷中所占比重高,热惯性大,适合需求响应。因此,中央空调冷水机组的功率估算是必不可少的。而制冷机的控制技术是中央空调企业的商业秘密。提出了一种基于前馈神经网络的制冷机功率估计方法。进一步,根据预估的制冷机功率,探讨了中央空调负荷参与电力系统的AGC控制。实验和仿真结果验证了该方法的有效性。
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引用次数: 0
Research on Active Current-Limiting Control and Fault Characteristics of DC Distribution Network 直流配电网有源限流控制及故障特性研究
Pub Date : 2021-04-01 DOI: 10.1109/ACPEE51499.2021.9437094
Qisheng Ran, Zhe Zhang, Jiexiang Han, Xianggen Yin
The DC distribution network based on the hybrid modular multilevel converter (MMC) has the ability of active current-limiting control, which plays an active role in fault clearing of distribution network. However, the fault characteristics of the DC distribution network become complicated because of the active current-limiting control. It brings new problems to the fault detection and judgment of relay protection. According to the structural features of the hybrid MMC, the start-up strategy and control objectives of the active current-limiting control are analyzed in this paper. The improvement suggestions are put forward to maintain the operational safety of the power grid, as well as meet the application requirements of the relay protection. Moreover, The characteristics of the short-circuit current of the DC distribution network are analyzed based on the active current-limiting control. Meanwhile, the influences on the relay protection are estimated. Finally, the effectiveness of the proposed current-limiting control strategy and the correctness of the fault characteristic analysis results are verified by simulation tests.
基于混合模块化多电平变换器(MMC)的直流配电网具有主动限流控制能力,对配电网的故障排除起着积极的作用。然而,有源限流控制使直流配电网的故障特征变得复杂。这给继电保护的故障检测与判断带来了新的问题。根据混合MMC的结构特点,分析了有源限流控制的启动策略和控制目标。为维护电网运行安全,满足继电保护的应用要求,提出了改进建议。此外,还分析了基于有源限流控制的直流配电网短路电流特性。同时,对继电保护的影响进行了估计。最后,通过仿真试验验证了所提限流控制策略的有效性和故障特征分析结果的正确性。
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引用次数: 1
期刊
2021 6th Asia Conference on Power and Electrical Engineering (ACPEE)
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