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An Open Source Simulation Toolkit for Large-Scale Electrical Power system Static and Dynamic Studies

An Open Source Simulation Toolkit for Large-Scale Electrical...

引用

2020 IEEE/IAS Industrial and Commercial Power system Asia, I and CPS Asia 2020

作者： Li, Changgang Wu, Yue Zhang, Hengxu Liu, Yutian Shandong University Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Jinan China

ISBN: (纸本)9781728143033

This paper is an overview of Simulation Toolkit of Electrical Power systems (STEPS). STEPS is an open-source toolkit designed for the education of power system simulation. STEPS has an independent kernel which is coded in C++ to achieve better computational efficiency. STEPS also provides a python module named stepspy to provide higher-level functions to simplify the operations. Power flow solution is implemented and options are included in STEPS to maintain a balance between speed and convergence. Based on the power flow solution, dynamic simulation of large-scale systems with renewable sources is also implemented in STEPS. Abundant additional options are provided to achieve better accuracy and speed. Detailed steps to install STEPS, approaches to use stepspy, and the way to use Python paralleling computing are discussed. Cases are given to show the performance of the power flow options provided in STEPS. Dynamic simulation and efficiency of Python parallel when generating samples for research are also presented in this paper. © 2020 IEEE.

关键词： Python

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Research on Harmonic Overvoltage Suppression Technology of Single-core Cable Shielding Layer

Research on Harmonic Overvoltage Suppression Technology of S...

引用

2020 IEEE/IAS Industrial and Commercial Power system Asia, I and CPS Asia 2020

作者： Chen, Tao Wu, Shouyuan Zhu, Ke Key Laboratory of Power System Intelligent Dispatch Control of Ministry of Education Shandong University Jinan China

ISBN: (数字)9781728143033

ISBN: (纸本)9781728143033

Traditional shielding layer protector of single-core cable can only suppress lightning and fault overvoltage, and can not solve the induced overvoltage and harmonic overvoltage caused by harmonics. When a discharge damping technology for shielding layer of single-core cable is proposed. Firstly, establish the coupling model of shielding layer by analyzing the mechanism of shielding layer induced voltage;then, study the induced overvoltage and resonance overvoltage caused by harmonics based on the model;furthermore, a technical scheme of reducing the overvoltage caused by harmonics by grounding the cable shielding layer through discharge capacitance and damping resistance in series is proposed;finally, give the method of choosing parameters of discharge capacitance and damping resistance. Theoretical results and simulated analysis confirm effectiveness of this method. © 2020 IEEE.

关键词： Cables

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Modelling and Analysis of Damping Characteristics of Grid Following Converter

Modelling and Analysis of Damping Characteristics of Grid Fo...

引用

2022 IEEE Power and Energy Society General Meeting, PESGM 2022

作者： Shen, Qian Li, Guanqun Ye, Hua Xie, Yongsheng Chen, Junru State Grid Jinan Power Supply Company Jinan250012 China Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan250061 China State Grid Xinjiang Electric Power Co. Ltd Urumqi830002 China Xinjiang University Urumqi830046 China

ISBN: (数字)9781665408233

ISBN: (纸本)9781665408233

The synchronization instability is one of the main issues for the operation of grid-following converter (GFL). Analogizing to the synchronous generator mechanism, GFL synchronism can be modelled in the form of swing equation. Thus, under the assumption that the damping is negligible, the equal area criterion (EAC) method is used to determine the GFL synchronization stability. However, in practice the damping is significant and inconstant during the transients. Sometimes, the damping becomes negative during the transients even is positive in the pre-fault, and resulting in the instability. The effect of the damping on the synchronization stability has not been thoroughly investigated. This paper visually reveals this effect. The simulation results show that the negative damping of GFL may lead to an optimistic prediction of synchronization stability by EAC method. © 2022 IEEE.

关键词： Damping

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Spinning Reserve Optimization under Multiple Time Resolution Unit Commitment Module

Spinning Reserve Optimization under Multiple Time Resolution...

引用

2020 IEEE/IAS Industrial and Commercial Power system Asia, I and CPS Asia 2020

作者： Li, Jianying Wang, Mingqiang Fang, Zhen Wang, Zhixin Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Shandong University Jinan China

ISBN: (纸本)9781728143033

Spinning reserve is the unused capacity of synchronized units and it is used to address the unforeseen events during power system operations. This paper proposes a spinning reserve optimization method under the multiple time resolution unified unit commitment and economic dispatch model. Finer time resolution and detailed modeling will be used during the first few hours of the scheduling cycle, while coarser time resolution and simplified modeling will be used during the remaining hours. The spinning reserve is determined by minimizing the running cost, start-up cost, shut-down cost, reserve cost and the expected interruption cost. In order to overcome the computation intractability introduced by EENS, EENS is formulated as linear function of the system spinning reserve. It is found that the multiple time resolution model is fit for determining multiple type of reserves rather than single type of reserve. The efficiency and validity of the proposed method is verified using the IEEE-RTS system. © 2020 IEEE.

关键词： Scheduling

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Efficient Multi-Robot Coverage of an Unknown Environment

Efficient Multi-Robot Coverage of an Unknown Environment

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第40届中国控制会议

作者： Zihao Chen Zhihong Peng Lei Jiao Yuanyuan Gui School of Automation Beijing Institute of Technology China State Key Laboratory of Intelligent Control and Decision of Complex System

This paper discusses the complete area coverage of multi-robots in unknown environments. Finding the optimal solution for the problem of area coverage with multiple robots has been proven to be NP-hard. This paper proposes the Multiagent Node Backtracking Area Coverage（MANBAC） algorithm, which uses improved BCD local area coverage method, and the node backtracking method that is based on the A* algorithm to achieve complete coverage of the entire unknown *** with the area coverage of a single robot, use multi robots can greatly improve the efficiency of area *** with the existing coverage algorithms in known area, this study can be applied to a wider range of area scenarios which are not known.

关键词： Area coverage Unknow environment Multirobot

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Event-driven fast frequency response for large active power disturbances 4

Event-driven fast frequency response for large active power ...

引用

4th IEEE Conference on Energy Internet and Energy system Integration, EI2 2020

作者： Cao, Yongji Zhang, Hengxu Li, Changgang Sun, Leshu Guo, Qi Zhu, Yihua Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of the Ministry of Education Jinan China

ISBN: (纸本)9781728196060

With the rapid development of renewable energy sources, the equivalent inertia of power systems is decreasing, which leads to more drastic dynamic frequency response. This paper proposes an event-driven fast frequency response (EFFR) approach to counter frequency decline after large power disturbances. Based on the data from the wide area measurement systems, a centralized control framework is established to perform the EFFR. Then, the reference power for EFFR can be determined promptly via monitoring active power deficits. Considering the control costs and power reserves, a utility index is created to quantify the priority of each unit to participate in EFFR, on which the reference power is distributed. Furthermore, a recovery strategy is designed to restore the normal operation states of units when the power system enters the quasi-steady state. According to a droop slope, units exit the EFFR mode in sequence, of which the distributed reference power decreases gradually. A case study is presented to validate the feasibility and effectiveness of the proposed approach. © 2020 IEEE.

关键词： Frequency response

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Evaluation Method of Static Voltage Stability in Multi-infeed HVDC system during Power system Restoration 5

Evaluation Method of Static Voltage Stability in Multi-infee...

引用

5th Asia Conference on Power and Electrical Engineering, ACPEE 2020

作者： Ai, Hongyu Wang, Hongtao Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Jinan China

ISBN: (纸本)9781728152813

Considering the coordination of restoration path selection and power recovery control, this paper proposes a static voltage stability evaluation method for multi-infeed HVDC (MIDC) system. Firstly, a multi-infeed comprehensive short circuit ratio (MISCR) index is applied to evaluate the voltage stability at the converter bus. The continuous power flow method is used to evaluate the static voltage stability margin of other AC nodes, which can not only be used as the safety constraint of power recovery, but also give the weak nodes of the system and guide the power recovery control. Then, the influence of restoration path on HVDC support capability is studied, a multi-infeed short circuit ratio offset (MSCRO) index is proposed to optimize the restoration path. When the restoration path is determined, MISCR can be used to calculate the maximum DC power that can be accessed and the voltage stability margin is obtained by continuous power flow method. Therefore, the purpose of making use of DC power to speed up the recovery process and ensure the safety of recovery is achieved. The IEEE 39 buses test system is taken as an example to verify the feasibility and effectiveness of the proposed method. © 2020 IEEE.

关键词： Recovery

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Security Assessment of Interdependent Electricity-Gas Networks

Security Assessment of Interdependent Electricity-Gas Networ...

引用

2020 IEEE Sustainable Power and Energy Conference, iSPEC 2020

作者： Wei, Tongxin Chu, Xiaodong Liu, Yutian Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China

ISBN: (纸本)9781728191645

Integrated energy networks are superb energy system configurations. There emerges many types of integrated energy networks, in which interdependent electricity-gas networks are commonly implemented ones. Security assessment the integrated energy network is a vital research topic, which is studied in this paper. First, the models of interdependent electricity-gas networks are shown with the coupling mechanism analyzed. Second, security assessment of the interdependent networks is implemented, in which the loss of load is selected as the indicator weighing security. Third, security assessment on the test electricity-gas networks is conducted. Simulation results demonstrate the effectiveness of the proposed security assessment strategy. © 2020 IEEE.

关键词： Network security

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Analysis of Subsynchronous Oscillation Caused by Integration of New Wind Farm via MMC-HVDC

Analysis of Subsynchronous Oscillation Caused by Integration...

引用

2020 IEEE/IAS Industrial and Commercial Power system Asia, I and CPS Asia 2020

作者： Zhang, Xi Ye, Hua Qi, Bin Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Jinan China

ISBN: (纸本)9781728143033

The integration of new wind farm via modular multilevel converter based high-voltage direct current (MMC-HVDC) will lead to subsynchoronous oscillation (SSO). The SSO will activate the protection of MMC-HVDC, and then the whole system will shut down. In order to address this problem, the propagation and distribution of SSO in the whole system are derived. First, the model of wind farms integrated into the power grid through MMC-HVDC is established. Second, the characteristics of SSO caused by the integration of new wind farm is analyzed. The process of propagation of SSO from wind farms to MMC-HVDC is derived. By calculating the instantaneous power of the MMC bridge arms, the frequencies of SSO components present in the system are calculated. The SSO components frequency relationship among wind farm, MMC-HVDC and power grid is revealed. Finally, the correctness of the theoretical analysis is validated by time-domain simulations. © 2020 IEEE.

关键词： Wind farm

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Nash Pursuit Strategy for Nonzero-Sum MPC Game via Inverse Optimal control 13

Nash Pursuit Strategy for Nonzero-Sum MPC Game via Inverse O...

引用

13th Asian control Conference, ASCC 2022

作者： Qiu, Tianyu Zhang, Han Wang, Jingchuan Department of Automation School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai China Institute of Medical Robotics Shanghai Jiao Tong University Shanghai China Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai200240 China Shanghai Engineering Research Center of Intelligent Control and Management Shanghai200240 China

ISBN: (纸本)9788993215236

In this paper, a traditional one v.s. one pursuit and evasion scenario is considered. The evader aims to reach her target and avoid being captured by the pursuer, while the pursuer, without the knowledge of the evader's cost function, intends to capture the evader before she successfully escapes. We formulate this problem as a Model Predictive control Decoupled Pursuit and Evasion Game (MPC-DPEG) model with incomplete information. We apply Inverse Optimal control (IOC) technique to estimate the evader's cost function and give a Nash pursuit strategy for MPC-DPEG as the optimal strategy for the pursuer. Numerical examples reveal the improvement of pursuit performance of the Nash pursuit strategy based on the estimated cost function over naive pursuit strategies. © 2022 ACA.

关键词： Simulation Optimal control Games Predictive models Cost function Numerical models Predictive control

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