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Load Shedding and Restoration for Intentional Island with Renewable Distributed Generation

Journal of Modern Power Systems and Clean Energy 2021年第3期9卷 612-624页

作者： Jian Xu Boyu Xie Siyang Liao Zhiyong Yuan Deping Ke Yuanzhang Sun Xiong Li xiaotao peng the School of Electrical Engineering and Automations Wuhan UniversityWuhan 430072China the China Southern Power Grid Research Institute China Southern Power Grid CompanyGuangzhou 510663China

Due to the high penetration of renewable distributed generation(RDG),many issues have become conspicuous during the intentional island operation such as the power mismatch of load shedding during the transition process and the power imbalance during the restoration *** this paper,a phase measurement unit(PMU)based online load shedding strategy and a conservation voltage reduction(CVR)based multi-period restoration strategy are proposed for the intentional island with *** proposed load shedding strategy,which is driven by the blackout event,consists of the load shedding optimization and correction *** the occurrence of the large-scale blackout,the load shedding optimization is solved periodically to obtain the optimal load shedding plan,which meets the dynamic and steady *** the blackout occurs,the correction table updated in real time based on the PMU data is used to modify the load shedding plan to eliminate the power mismatch caused by the fluctuation of *** the system transits to the intentional island seamlessly,multi-period restoration plans are generated to optimize the restoration performance while maintaining power balance until the main grid is ***,CVR technology is implemented to restore more loads by regulating load *** proposed load shedding optimization and restoration optimization are linearized to mixed-integer quadratic constraint programming(MIQCP)*** effectiveness of the proposed strategies is verified with the modified IEEE 33-node system on the real-time digital simulation(RTDS)platform.

关键词： Intentional island renewable distributed generation(RDG) load shedding restoration phase measurement unit(PMU) conservation voltage reduction(CVR)

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Demand-side Management Based on Model Predictive Control in Distribution Network for Smoothing Distributed Photovoltaic Power Fluctuations

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Journal of Modern Power Systems and Clean Energy 2022年第5期10卷 1326-1336页

作者： Jian Xu Haobo Fu Siyang Liao Boyu Xie Deping Ke Yuanzhang Sun Xiong Li xiaotao peng IEEE School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072China Power Dispatching and Control Center of State Grid Jibei Electric Power Company Limited Bejing 100054China

With the rapid increase of distributed photovoltaic(PV) power integrating into the distribution network(DN), the critical issues such as PV power curtailment and low equipment utilization rate have been caused by PV power fluctuations. DN has less controllable equipment to manage the PV power fluctuation. To smooth the power fluctuations and further improve the utilization of PV, the regulation ability from the demandside needs to be excavated. This study presents a continuous control method of the feeder load power in a DN based on the voltage regulation to respond to the rapid fluctuation of the PV power output. PV power fluctuations will be directly reflected in the point of common coupling(PCC), and the power fluctuation rate of PCCs is an important standard of PV ***, a demand-side management strategy based on model predictive control(MPC) to mitigate the PCC power fluctuation is proposed. In pre-scheduling, the intraday optimization model is established to solve the reference power of PCC. In real-time control, the pre-scheduling results and MPC are used for the rolling optimization to control the feeder load demand. Finally,the data from the field measurements in Guangzhou, China are used to verify the effectiveness of the proposed strategy in smoothing fluctuations of the distributed PV power.

关键词： Demand-side management multi-time-scale optimization power fluctuation smoothing load control model predictive control(MPC)

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Adsorption experiment of water-soluble rare earth elements in atmospheric depositions and implications for source tracing in South China

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Acta Geochimica 2021年第2期40卷 225-233页

作者： Xiaojian Mi Yuan Li Yuefeng Liu Yu Xie Hanjie Li xiaotao peng Houyun Zhou School of Geography South China Normal UniversityGuangzhou 510631China Department of Geography Lingnan Normal UniversityZhanjiang 524048China

The distribution patterns of rare earth elements(REEs)in fine-grained materials in various depositions were often found to be similar to those of the aeolian sediments deposited in the Loess Plateau in North China and the fine-grained materials were suggested to be derived from wind-blown ***,increasing evidence indicated that the REEs in the water-soluble portion of atmospheric depositions also displayed similar patterns to those of aeolian *** this study,water-soluble REEs in three atmospheric depositions collected from different climatic zones in China were adsorbed with two adsorbents with distinct adsorption capacity,glass powder,and co-precipitated iron *** results showed that the REEs adsorbed by the two adsorbents displayed patterns similar to those of the original atmospheric *** typical characteristics of the REE patterns of atmospheric deposition can be well reproduced in the adsorbed *** higher the REE concentrations in the atmospheric depositions,or the higher adsorption efficiency of the adsorbents,the better reproducibility of the REEs *** results suggest that the REEs of the fine-grained materials in various sediments,which have a high adsorption capacity,especially those deposited in South China,may come from the water-soluble REEs in atmospheric deposition,and may not be appropriate tracers of wind-blown dust from North China.

关键词： Atmospheric deposition Rare earth element Adsorption experiment Source tracing Fine-grained material

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An on-line power/voltage stability index for multi-infeed HVDC systems

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Journal of Modern Power Systems and Clean Energy 2019年第5期7卷 1094-1104页

作者： Jian XU Tiankai LAN Siyang LIAO Yuanzhang SUN Deping KE Xiong LI Jun YANG xiaotao peng School of Electrical Engineering and Automation Wuhan UniversityWuhanChina

High-voltage direct current(HVDC)transmission is playing an increasingly important role in modern power systems,and the resulted power/voltage stability issue has raised widespread *** paper presents an on-line power/voltage stability index(PVSI)for multi-infeed HVDC(MIDC)*** from the existing indices which are developed mainly for off-line and static analysis,the proposed PVSI can be applied in real *** of system changes on stability assessment such as change of system states and control strategies are ***,helpful guidance can be provided for on-line HVDC stability and *** PVSI is originally deduced for single-infeed HVDC systems in an‘‘AC way’’by analyzing the power and voltage stability of both pure AC systems and HVDC ***,its on-line application in practical MIDC systems is realized by building an equivalent single-infeed model,and utilizing nowadays measurement and communication infrastructures such as wide-area measurement system(WAMS).The effectiveness of the PVSI is verified through simulations in real-time digital simulator(RTDS).

关键词： Multi-infeed high-voltage direct current(HVDC)system Power stability Voltage stability Stability index Practical on-line application

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Robust optimal dispatch strategy of integrated energy system considering CHP-P2G-CCS

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Global Energy Interconnection 2024年第1期7卷 14-24页

作者： Bin Zhang Yihui Xia xiaotao peng School of Electrical Engineering Naval University of EngineeringWuhan 430000P.R.China School of Electrical Engineering Wuhan UniversityWuhan 430072P.R.China

Integrated energy systems(IESs)can improve energy efficiency and reduce carbon emissions,essential for achieving peak carbon emissions and carbon *** study investigated the characteristics of the CHP model considering P2G and carbon capture systems,and a two-stage robust optimization model of the electricity-heat-gascold integrated energy system was ***,a CHP model considering the P2G and carbon capture system was established,and the electric-thermal coupling characteristics and P2G capacity constraints of the model were derived,which proved that the model could weaken the electric-thermal coupling characteristics,increase the electric power regulation range,and reduce carbon ***,a two-stage robust optimal scheduling model of an IES was constructed,in which the objective function in the day-ahead scheduling stage was to minimize the start-up and shutdown *** objective function in the real-time scheduling stage was to minimize the equipment operating costs,carbon emission costs,wind curtailment,and solar curtailment costs,considering multiple ***,after the objective function is linearized with a ψ-piecewise method,the model is solved based on the C&CG *** results show that the proposed model can effectively absorb renewable energy and reduce the total cost of the system.

关键词： Combined heat and power Power-to-gas Carbon capture system Integrated energy system Robust optimization

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A Multi-time Scale Tie-line Energy and Reserve Allocation Model Considering Wind Power Uncertainties for Multi-area Systems

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CSEE Journal of Power and Energy Systems 2021年第4期7卷 677-687页

作者： Jian Xu Siyang Liao Haiyan Jiang Danning Zhang Yuanzhang Sun Deping Ke Xiong Li Jun Yang xiaotao peng Liangzhong Yao School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072China State Grid(Suzhou)City&Energy Research Institute Suzhou 215000China State Grid Zhengzhou Electric Power Supply Company Zhengzhou 450000China

Continued expansion of the power grid and the increasing proportion of wind power centralized integration leads to requirements in sharing both energy and reserves among multiple areas under a hierarchical control structure,which successively requires a correction between schedule plans within multi-time *** order to address this problem,this paper develops an information integration method integrating complicated relationships among fuel cost,total thermal power output,reserve capacity,owned reserves and expectations of load shedding and wind curtailment,into three types of time-related relationship curves・Furthermore,a multi-time scale tieline energy and reserves allocation model is proposed,which contains two levels in the control structure,two time scales in dispatch sequence and multiple areas integrated within wind farms as scheduling objects・The efficiency of the proposed method is tested in a 9-bus test system and IEEE 118-bus *** results show that a cross-regional control center is able to approach the optimal scheduling results of the whole system with the integrated uploaded relationship *** proposed model not only relieves energy and reserve shortages in partial areas but also allocates them to more urgent need areas in a high effectivity manner in both day-ahead and intraday time scales.

关键词： Energy and reserve allocation hierarchical control structure multi-area system multi-time scale economic dispatch wind power

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基于混合多智能体遗传算法的作业车间调度问题研究

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北京航空航天大学学报 2017年第2期43卷 410-416页

作者：李小涛彭翀北京航空航天大学机械工程及自动化学院北京100083

针对作业车间调度问题(JSP)的非确定性多项式特性与解空间分布的大山谷属性,本文提出一种多智能体遗传算法(MAGA)与自适应模拟退火算法(ASA)的混合优化算法,用于寻找最大完工时间最短的调度。首先,将每个染色体视作独立的智能体并采用... 详细信息

针对作业车间调度问题(JSP)的非确定性多项式特性与解空间分布的大山谷属性,本文提出一种多智能体遗传算法(MAGA)与自适应模拟退火算法(ASA)的混合优化算法,用于寻找最大完工时间最短的调度。首先,将每个染色体视作独立的智能体并采用工序编码方式随机初始化每个智能体,结合多智能体协作与竞争理论设计了实现智能体之间交互作用的邻居交互算子,进而利用一定数量智能体进行全局搜索,找到多个适应度较高的可行解。其次,为避免算法陷入局部最优,采用ASA对每个智能体开展局部寻优。最后,通过基准测试库中典型实例的计算结果验证了该算法的有效性。

关键词：作业车间调度(JSP) 多智能体遗传算法邻居交互算子自适应模拟退火算法(ASA)

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深远海线性内波条件下声场时间相关性的空间分布

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声学学报 2017年第3期42卷 267-273页

作者：于小涛彭临慧郁高坤农业部海洋渔业可持续发展重点实验室、中国水产科学研究院黄海水产研究所青岛266071 中国海洋大学海洋技术系青岛266100

深海声场特定的干涉结构导致其时间相关性的空间起伏,研究这种空间特性可以为水声信号的探测与处理提供重要参考。利用抛物方程声场仿真模型,联合Monte-Carlo数值方法计算分析了深远海线性内波条件下声场时间相关性的空间分布特性。与... 详细信息

深海声场特定的干涉结构导致其时间相关性的空间起伏,研究这种空间特性可以为水声信号的探测与处理提供重要参考。利用抛物方程声场仿真模型,联合Monte-Carlo数值方法计算分析了深远海线性内波条件下声场时间相关性的空间分布特性。与现有的研究相比,给出了时间相关性的距离和深度起伏特征。结果表明,当接收达到一定距离,声场时间相关性的空间分布具有与声场干涉条纹类似的结构,声场干涉越强,时间相关性越好。此外,声源频率和声速标准差的变化会引起时间相关性空间分布规律的改变,且会聚区传播模式下的改变强于深海声道传播模式。

关键词：时间相关性空间分布深海声道传播模式干涉条纹会聚区抛物方程水声信号空间特性声源定位

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Estimation of wall parameters based on range profiles

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Science China(Information Sciences) 2011年第10期54卷 2178-2189页

作者： LI Xin 1 ,AN DaoXiang 1,HUANG xiaotao 1 & peng ShiRui 2 1 College of Electronic Science and Engineering,National Uniersity of Defense Technology,Changsha 410073,China 2 Department of Information Counter Measurement Airforce Radar Academy,Wuhan 430019,China College of Electronic Science and Engineering National Uniersity of Defense Technology Changsha China Department of Information Counter Measurement Airforce Radar Academy Wuhan China

Compensation of wall effects is of main concern in SAR through-wall *** parameters are essential for the compensation,which are normally not known a priori.A model of SAR working in sidelooking strip mode for through-wall imaging is established,with the path of signal due to refraction taken into *** analyzing the echo configuration in time domain,a new procedure for estimating wall parameters using high range resolution profiles is *** extracting time delay of target counterpart,the thickness and permittivity of wall are figured out exactly by employing numerical equation method and intersecting of searching *** the estimated parameters,focused image of targets in a room is acquired after wall effects are compensated in imaging processing with back projection *** results verify the validity of the theoretical analysis and imaging algorithm.

关键词： synthetic aperture radar (SAR) range profiles parameters estimation wall compensation

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基于复转矩系数法的双馈风机次同步控制相互作用阻尼特性研究

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电网技术 2020年第4期44卷 1247-1256页

作者：周际城彭晓涛罗鹏梁恺张政武汉大学电气与自动化学院湖北省武汉市430072

双馈风电场中的次同步控制相互作用(subsynchronous control interaction,SSCI)主要由双馈感应电机的多动态控制与传输线路中的固定串联电容之间的相互作用引起。从双馈风机转子电压方程出发,基于转速控制、转子侧变流器(rotor side con... 详细信息

双馈风电场中的次同步控制相互作用(subsynchronous control interaction,SSCI)主要由双馈感应电机的多动态控制与传输线路中的固定串联电容之间的相互作用引起。从双馈风机转子电压方程出发,基于转速控制、转子侧变流器(rotor side control,RSC)的功率外环和电流内环控制,推导了电磁转矩对转速的传递函数,进而基于复转矩系数法提出了用于分析双馈风电机场经串补线路并网系统SSCI稳定性的电气阻尼系数表达式。在此基础上,利用电磁转矩的电气阻尼系数表达式分析了风速、串补度、转速和RSC不同控制参数对SSCI稳定特性的影响。分析结果表明:降低风速、增大串补度、增大转速和RSC控制的比例参数和减小RSC控制的积分参数都会导致系统SSCI不稳定。最后利用PSCAD/EMTDC时域仿真,验证了利用所提电气阻尼特性分析系统SSCI稳定性的正确性和有效性。

关键词：双馈风力发电机次同步控制相互作用复转矩系数法电气阻尼固定串补电容

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