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SSRN 2023年

作者： Zhang, Hugan Zhang, Xianku Gao, Shihang Han, Xu Ma, DaoCheng Key Lab. of Marine Simulation and Control Navigation College Dalian Maritime University Dalian116026 China

This article proposes a new LOS guidance method based on position prediction, which constructs the total path deviation by predicting the future time position of ships. It can solve the problem of overshoot that is prone to occur in the path following process of ultra large underactuated ships. Use global fast terminal sliding mode to design controllers that allow path deviations to converge in finite time. In order to solve the problems of unknown speed, disturbance, and sideslip angle during navigation, a high-order nonlinear observer is designed to estimate the system states, obtaining the velocity values and external disturbances. By estimating the velocity, the ship's sideslip angle during navigation is obtained. So the problem of unknown sideslip angle is solved, and finally, the effectiveness of the proposed algorithm was verified through simulation experiments. © 2023, The Authors. All rights reserved.

关键词： Ships

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Trajectory Tracking control of Uuvs Based on the Ppg Method with Disturbance Observer

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SSRN 2023年

作者： Zhang, Hugan Zhang, Xianku Key Lab. of Marine Simulation and Control Navigation College Dalian Maritime University Dalian116026 China

In order to solve the problems of environment disturbances and model parameter perturbation in under actuated Underwater Vehicles (UUVs) trajectory tracking control, a Sliding mode control algorithm based on projected perpendicular guidance (PPG) is proposed in this paper. Firstly, by simplifying the six degrees of freedom UUVs model, a model suitable for trajectory tracking controller design is obtained. Secondly, a novel type of PPG method is proposed, and a virtual control law is designed to convert the trajectory tracking control into speed control and heading control, and the sliding mode controller is used to control the speed, heading and depth. Due to the susceptibility of UUVS to external environmental disturbances and model parameter perturbations during trajectory tracking, a disturbance observer is used to estimate the disturbance and feedback it into the controller design. Finally, the effectiveness of the proposed algorithm is verified through simulation of linear and curve trajectories respectively. © 2023, The Authors. All rights reserved.

关键词： Trajectories

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A Stochastic Resource Management Scheme for Multi-Energy Group control system 3

A Stochastic Resource Management Scheme for Multi-Energy Gro...

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3rd IEEE International Conference on Power, Electronics and Computer Applications, ICPECA 2023

作者： Ding, Ran Sun, Rongfu Geng, Yan Yao, Yiming Zhao, Ergang Xu, Lina State Grid Jibei Electric Power Company Limited Beijing China Tsinghua University State Key Lab. of Control and Simulation of Power System and Generation Equipment Dept. of Electrical Engineering Beijing China

ISBN: (纸本)9781665472784

The interaction between various energy supply systems (cold, heat, electricity, gas, etc.) is becoming more tightly coupled as social economy and technology advance. Multi-energy systems are ineffective because different types of energy systems run independently. In order to protect the data privacy of each sub-system, this research suggests an ideal resource management framework for a multi-energy group control system. The energy hub (EH) paradigm is first suggested. When deploying EHs, the physical constraints of various energy systems are taken into account. Through scenario-based stochastic programming, the uncertainties of renewable energy are considered. According to the leader-follower relationship between multi-energy group control system operators and energy hub operators (EHOs), Benders decomposition is applied to decentralize the decision-making process. Finally, an example is given to illustrate the effectiveness of the proposed model and algorithm. © 2023 IEEE.

关键词： Data privacy

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Energy storage system participates in frequency modulation control and capacity balance strategy of power system 5

Energy storage system participates in frequency modulation c...

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5th IEEE International Electrical and Energy Conference, CIEEC 2022

作者： Wang, Zhenyang Zhai, Wenchao Yan, Gangui Zhao, Yue Cui, Youshi Jia, Xihao Northeast Electric Power University Dept. Min. of Educ. Key Lab. of Modern Power System Simulation Control and Green Power Technology Jilin China

ISBN: (数字)9781665411042

ISBN: (纸本)9781665411042

The grid-connected wind power generation leads to frequent frequency safety problems in the system, and new primary frequency modulation measures are urgently needed. In order to ensure the economy and safety of power grid operation, it is necessary to conFigure energy storage system for wind farm. In this paper, the control strategy is designed to use energy storage for primary frequency modulation. At present, the SOC imbalance of internal battery components is common in energy storage batteries. Therefore, this paper proposes an adjustable capacity proportional equalization control algorithm based on the current capacity of energy storage batteries. According to the different SOC of each battery component of energy storage batteries and its operating state (charge and discharge), it determines how to reasonably distribute the power deviation signal generated by frequency modulation to each energy storage battery component, so that the energy storage battery can not only support the frequency adjustment of power grid, but also improve its own SOC imbalance. Finally, based on EMTDC/PSCAD simulation model, the effectiveness of this method is verified. simulation results show that this method can effectively balance the system SOC. © 2022 IEEE.

关键词： Frequency modulation

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Identification Modeling of Ship Nonlinear Motion Based on Nonlinear Innovation

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SSRN 2022年

作者： Meng, Yao Zhang, Xianku Zhang, Xiufeng Key Lab. of Marine Simulation and Control Navigation College Dalian Maritime University Dalian116026 China

In order to further improve the accuracy of parameter identification of ship nonlinear motion mathematical model, grey wolf optimizer-support vector regression (GWO-SVR) is embedded into the nonlinear innovation processed by hyperbolic tangent function. A novel identification scheme called nonlinear innovation GWO-SVR(NGWO-SVR) is proposed for identification of ship nonlinear motion model. Based on the full-scale trial data of vessel YUKUN, the NGWO-SVR is used to identify the parameters of the nonlinear motion mathematical model. Using full-scale trial data different from the identified samples, the generalization of the parameters obtained from SVR, GWO-SVR and NGWO-SVR are verified. From the evaluation criteria of the prediction results, the parameters identified by the proposed algorithm are more generalized under the condition of effectiveness of certain accuracy. The research results can provide a priori characteristics for intelligent ship motion control and path planning and a reference scheme for the optimization of ship motion mathematical model in marine simulator. © 2022, The Authors. All rights reserved.

关键词： Parameter estimation

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Group equivalent modeling and analysis of group subsynchronous oscillation of direct-drive wind turbine 5

Group equivalent modeling and analysis of group subsynchrono...

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5th IEEE International Electrical and Energy Conference, CIEEC 2022

作者： Dong, Xuetao Zhao, Yue Zhai, Wenchao Wang, Zhenyang Liu, Kan Yan, Gangui Electric Power Research Institute of State Grid Xinjiang Electric Power Co. Ltd. Dept. Xinjiang Electric Power System Whole Process Simulation Key Laboratory Urumqi China Northeast Electric Power University Dept. Min. of Educ. Key Lab. of Modern Power System Simulation Control and Green Power Technology Jilin China

ISBN: (数字)9781665411042

ISBN: (纸本)9781665411042

Taking the direct drive wind farm connected to weak AC system as the research object, combined with the actual topology of a wind farm in Hami, Xinjiang, this paper establishes the detailed model and cluster aggregation model of direct drive wind farm on PSCAD / EMTDC platform, and comprehensively analyzes the effectiveness of aggregation model under sub synchronous oscillation (SSO). The results show that when SSO occurs, the cluster equivalent model can accurately reflect the output characteristics, damping characteristics and oscillation frequency of the wind farm. According to the actual topology of a wind power collection station in Hami, Xinjiang and the actual operation of a wind power collection station on a certain day, the equivalent clustering is carried out. © 2022 IEEE.

关键词： Wind power

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A Stochastic Resource Management Scheme for Multi-Energy Group control system

A Stochastic Resource Management Scheme for Multi-Energy Gro...

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Power Electronics, Computer Applications (ICPECA), IEEE International Conference on

作者： Ran Ding Rongfu Sun Yan Geng Yiming Yao Ergang Zhao Lina Xu State Grid Jibei Electric Power Company Limited Beijing China Dept. of Electrical Engineering State Key Lab. of Control and Simulation of Power System and Generation Equipment Tsinghua University Beijing China

关键词： Data privacy Renewable energy sources Uncertainty Decision making Stochastic processes Process control Programming

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A Novel Triple Capacitor Multi-Level Submodule Mmc Topology with Fault Current Clearing Capability

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SSRN 2023年

作者： Sun, Yinfeng Jia, Guobin Hao, Jiaqi Lu, Mingzhi Li, Guoqing Wang, Zhenhao Wu, Xueguang Modern Power System Simulation Control and Green Energy New Technol. Key Lab. The Ministry of Education Northeast Electric Power Univ. Jilin132012 China State Grid Smart Grid Research Institute Beijing China

In the high voltage direct current system based on modular multilevel converter (MMC-HVDC), the half-bridge submodule (HBSM) has become the preferred submodule for significant projects due to its convenient control and low cost. However, the DC shortcircuit protection performance of MMC-HVDC will seriously restrict its development in areas such as overhead lines, high voltage, and large capacity. This article proposes a triple capacitor multi-level submodule (TCMSM) based on a modular multilevel converter with DC fault-blocking capability. It utilizes at least one-third of the module capacitance in the bridge arm to reverse, suppress the DC fault current and turn off the diode. At the same time, the unidirectional conductivity of the diode can also prevent arc reignition at the fault point. The article also conducted in-depth research on the DC short-circuit fault elimination mechanism of this topology, and compared its performance with other topologies. Through analysis, it can be concluded that TCMSM reduces the initial investment and operating costs by reducing the number of devices inside the module while possessing the fault current blocking ability. Finally, MATlab.Simulink was used to simulate and verify the proposed new topology, and its performance was analyzed. © 2023, The Authors. All rights reserved.

关键词： Topology

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Distribution system fault location method using reclosure-generating traveling waves

Distribution system fault location method using reclosure-ge...

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2020 IEEE Power and Energy Society General Meeting, PESGM 2020

作者： Dong, Xinzhou Wang, Haozong Xin, Zeyu Shi, Shenxing Wang, Bin Tsinghua University State Key Lab. of Control and Simulation of Power System and Generation Equipment Dept. of Electrical Engineering Beijing China

ISBN: (纸本)9781728155081

Fault location in distribution systems includes 2 subtasks: fault distance estimation and fault section identification. This paper presents a fault location method based on reclosure-generating traveling waves and system topology. Firstly, the reclosure-generating traveling waves under normal and fault conditions are analyzed to find the traveling wave reflected by fault point, through which the fault distance could be estimated. Secondly, we propose a fault section identification method by comparing real measured traveling waves with simulated traveling waves with different potential fault points. Noticing that only time information of traveling waves rather than their magnitude is necessary, instead of using electromagnetic transient simulation, we also present a simplified simulation algorithm that only focuses on the arrival time of traveling waves based on priority queue. Experiments demonstrate that the proposed method can locate fault points in high accuracy with low computational burden. © 2020 IEEE.

关键词： Location

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Corrigendum “Maneuverability indices estimation of nonlinear response model based on full-scale trial data and square root unscented Kalman filter” [Ocean Eng. 286, Part 2, (October 2023), 115699]

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Ocean Engineering 2024年 305卷

作者： Yao Meng Xianku Zhang Xiufeng Zhang Yating Duan Navigation College Dalian Maritime University Dalian 116026 China Key Lab. of Marine Simulation and Control Dalian Maritime University Dalian 116026 China

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