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arXiv 2022年

作者： Li, Yuanzheng He, Shangyang Li, Yang Ge, Leijiao Lou, Suhua Zeng, Zhigang School of Artificial Intelligence and Automation Key Laboratory on Image Information Processing and Intelligent Control of Ministry of Education Huazhong University of Science and Technology Wuhan430074 China China-Belt and Road Joint Laboratory on Measurement and Control Technology Wuhan430074 China China-EU Institute for Clean and Renewable Energy Huazhong University of Science and Technology Wuhan430074 China School of Electrical Engineering Northeast Electric Power University Jilin 132012 China The Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin 300072 China School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China

The electric vehicle (EV) and electric vehicle charging station (EVCS) have been widely deployed with the development of large-scale transportation electrifications. However, since charging behaviors of EVs show large uncertainties, the forecasting of EVCS charging power is non-trivial. This paper tackles this issue by proposing a reinforcement learning assisted deep learning framework for the probabilistic EVCS charging power forecasting to capture its uncertainties. Since the EVCS charging power data are not standard time-series data like electricity load, they are first converted to the time-series format. On this basis, one of the most popular deep learning models, the long short-term memory (LSTM) is used and trained to obtain the point forecast of EVCS charging power. To further capture the forecast uncertainty, a Markov decision process (MDP) is employed to model the change of LSTM cell states, which is solved by our proposed adaptive exploration proximal policy optimization (AePPO) algorithm based on reinforcement learning. Finally, experiments are carried out on the real EVCSs charging data from Caltech, and Jet Propulsion laboratory, USA, respectively. The results and comparative analysis verify the effectiveness and outperformance of our proposed framework. Copyright © 2022, The Authors. All rights reserved.

关键词： Markov processes

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Economic power Consumption of Large Industrial Customers under power Market Environment

Economic Power Consumption of Large Industrial Customers und...

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IEEE Student Conference on Electric Machines and Systems

作者： Wei Hou Mingqiang Wang Xin Wang Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education (Shandong University) Jinan China State Grid Shandong Electric Power Construction Company Jinan China

ISBN: (数字)9781728156224

ISBN: (纸本)9781728156231

With the development of China's power market, more and more large industrial customers are participating in electricity market transactions, and they gradually began to pay attention to economic power consumption issues. Based on real data, this paper analyzes how large industrial customers make the best decisions to lower their electricity payment considering various real characteristics such as order requirement of production lines, specific production process, and continuity of power consumption, etc. The proposed model realizes the economic power consumption by adjusting the daily production schedule of large industrial customers. The feasibility and effectiveness of the proposed model are illustrated by case studies.

关键词： Economics Schedules power demand Production power markets Mathematical model Load modeling

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Start-up Sequence Optimization of Units and HVDC for Hybrid Multi-Infeed DC Receiving Systems

Start-up Sequence Optimization of Units and HVDC for Hybrid ...

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2019 IEEE PES Asia-Pacific power and Energy Engineering Conference, APPEEC 2019

作者： Li, Peng Wang, Hongtao Yang, Dong Ma, Huan Zhao, Kang Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Jinan China Shandong Electric Power Research Institute State Grid Jinan China

ISBN: (纸本)9781728108131

Aiming at the problem of unit restoration optimization of hybrid multi-infeed direct current (HMIDC) system, an optimization method for start-up sequence of units and HVDC in HMIDC receiving system with LCC-HVDC and VSC-HVDC participation is proposed. Firstly, the interaction between AC and DC systems in the restoration process is analyzed. Then, the multi-objective optimization model of start-up sequence considering HVDC start-up constraints and operational stability constraints is established. And an algorithm based on fast non-dominated sorting genetic algorithm (NSGA-II) for solving the above model is designed. Finally, the feasibility and effectiveness of the proposed method are verified by using IEEE 39 nodes system as an example. © 2019 IEEE.

关键词： Restoration

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Node importance evaluation in power system restoration considering the impact of DC converter station 3

Node importance evaluation in power system restoration consi...

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3rd IEEE International Conference on Energy Internet, ICEI 2019

作者： Hu, Haizhou Wang, Hongtao Yang, Dong Ma, Huan Zhao, Kang Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Shandong University Jinan China Shandong Electric Power Research Institute State Grid Jinan China

ISBN: (纸本)9781728114934

In view of the AC-DC interconnected background, this paper studied the evaluation method of node importance during the grid restoration. Firstly, based on the constraints of DC transmission system start, the processing method for evaluating the electrical property of the converter station was proposed. Next, combined with generator and load capacity, the electrical property index of node was put forward. Then, two indexes were raised from different aspects of power-off network. Finally, with the help of CRITIC weighting method, the three indexes mentioned above were well integrated to identify key nodes. The example showed that this method could not only express the network topology information of the node commendably but also reflect electrical property effectively in current state. © 2019 IEEE.

关键词： Restoration

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Static voltage stability domain and power margin for multi-infeed DC system during recovery process 3

Static voltage stability domain and power margin for multi-i...

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3rd IEEE International Conference on Energy Internet, ICEI 2019

作者： Yang, Shandong Wang, Hongtao Yang, Dong Ma, Huan Zhao, Kang Key Laboratory of Power System Intelligent Dispatch Control Ministry of Education Shandong University Jinan China Shandong Electric Power Research Institute State Grid Jinan China

ISBN: (纸本)9781728114934

During the recovery of multi-infeed DC system after blackout, utilizing DC transmission to support the load recovery of receiving AC system can largely speed up the recovery process, but it will increase the challenges of voltage collapse at the same time because of the impactful reactive power consumption of DC. In order to avoid voltage collapse and give the power margin for recovery, this paper proposed the static voltage stability domain method to study the static voltage stability of DC participating in recovery. First, the impact of DC power is taken into account by adding DC power as variable parameters to the continuous power flow algorithm. Second, voltage collapse points are calculated using the improved continuous power flow algorithm to shape the static voltage stability domain. Then, the AC/DC power margin is defined as the shortest distance between operating point of system and the boundary of static voltage stability domain. Finally, the AC/DC power margin is calculated by using the normal of the boundary of static voltage stability domain to amend the power growth direction. The proposed AC/DC power margin can not only evaluate the voltage stability margin of multi-infeed DC system, but also guide the power recovery control. The effectiveness of this proposed method is validated in the test system. © 2019 IEEE.

关键词： Recovery

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Dynamic Economic Dispatch Considering Transmission-Distribution Coordination and Automatic Regulation effect of Transmission System

Dynamic Economic Dispatch Considering Transmission-Distribut...

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IEEE/IAS Industrial and Commercial power System Asia (I&CPS Asia)

作者： Yuqian Wu Mingqiang Wang Mengxia Wang Linguo Jing Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China State Grid Tangshan Power Supply Company Tangshan China State Grid Binzhou Power Supply Company Binzhou China

ISBN: (数字)9781728143033

ISBN: (纸本)9781728143040

With the increase of proportion of renewable energy, the uncertainty in power system is significantly increased, and the security operation of power system is facing more challenges. In traditional economic dispatch model, the unit output and load are expressed by constant power, which ignores the automatic regulation effect during system operation. And the transmission system and distribution system are separated optimized, the coordination effect is not considered. In this paper, a new dynamic economic dispatch model is proposed and the automatic regulation effect and transmission-distribution coordination are considered, which can improve the renewable energy accommodation and enhance the system operation security and economics. The validity and effectiveness of the proposed model are illustrated by case studies.

关键词： Voltage control Load modeling Economics power system dynamics Renewable energy sources Reactive power

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Modeling and control of Central Air Conditioning Loads for Peak Shaving

Modeling and Control of Central Air Conditioning Loads for P...

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2019 IEEE PES Asia-Pacific power and Energy Engineering Conference, APPEEC 2019

作者： Cheng, Dingyi Zhang, Wen Liu, Meng Intelligent Dispatch and Control of Ministry of Education Shandong University Key Laboratory of Power System Jinan China State Grid Shandong Electric Power Research Institute Jinan China

ISBN: (纸本)9781728108131

Peak shaving can be realized by applying appropriate control on central air conditioning loads due to their large proportion and thermal energy storage characteristics. Simplified model of single central air conditioner is established by analyzing its operating principle. Based on individual model, optimal control model of central air conditioning loads for participating in peak shaving is proposed. Objective is to obtain maximum loads of peak shaving. Constraints take peak shaving and users' comforts into consideration. It should be noted that this optimization model is a mixed integer linear programming and can be solved conveniently. Based on the test platform for central air conditioner, the correctness of individual model can be verified. The effectiveness of optimal control model for peak shaving is verified by simulation results. © 2019 IEEE.

关键词： Integer programming

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Function and Dynamic Performance Test of MVIP HVDC control and Protection System

Function and Dynamic Performance Test of MVIP HVDC Control a...

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HVDC (HVDC), International Conference on

作者： Ou Kaijian State Key Laboratory of HVDC Electric Power Research Institute Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China

ISBN: (数字)9781728175935

ISBN: (纸本)9781728175942

FPT/DPT (Functional Performance Tests and Dynamic Performance Tests) is a key process in HVDC project. The simulation and testing system included RTDS(Real-Time Digital Simulator) and C&P(control and Protection) cubicles of MVIP HVDC project is set up. Based on this simulation and testing system, the function and dynamic performance of MVIP HVDC C&P system are tested. Totally 32 test groups and more than 400 test items are included in the testing matrix. The C&P software is optimized and improved during the test. Two typical test cases, i.e. low power start-up and power reversal, are introduced in this paper.

关键词： HVDC transmission Testing power system dynamics Workstations Software Optical filters Steady-state

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Feasibility Analysis of Single-end Equivalent Modeling to LCC-HVDC Transimission System

Feasibility Analysis of Single-end Equivalent Modeling to LC...

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IEEE Conference on Energy Internet and Energy System Integration (EI2)

作者： Bin Wang Zhizhong Li Qi Guo Zhijiang Liu Shuyong Li Liu Cui Tsinghua University Beijing China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System State Key Laboratory of HVDC (Electric Power Research Institute China Southern Power Grid) Guangzhou China National Energy Power Grid Technology R&D Centre State Key Laboratory of HVDC (Electric Power Research Institute China Southern Power Grid) Guangzhou China China Southern Power Grid State Key Laboratory of HVDC (Electric Power Research Institute China Southern Power Grid) CSG Key Laboratory for Power System Simulation Electric Power Research Institute Guangzhou China

ISBN: (数字)9781728196060

ISBN: (纸本)9781728196077

The commutation failures seriously threaten the safe operation of hybrid AC/DC grid. Considering that commutation failure occurs only on the inverter side, it is very important to study the voltage controlled current source model of LCC HVDC single terminal measurement information with high equivalent accuracy, which is very important for the practicality of real-time electromagnetic transient simulation of LCC HVDC dynamic phasor model. In order to this problem, this paper further discusses the single terminal equivalent model of LCC HVDC system which does not depend on the measurement information of DC sending end AC system, and explores the estimation method of single terminal fast transient response of complex AC/DC coupling faults induced by AC side fault of LCC HVDC inverter station and participation of DC control separation. The error distribution of single terminal equivalent calculation is quantitatively analyzed to lay a foundation for the follow-up protection and control technology research.

关键词： Analytical models Solid modeling Voltage measurement HVDC transmission Estimation Inverters Voltage control

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Fault Model of Inverter Interfaced Distributed Generator Adopting PQ control Strategy Considering Current Tracking Capability of Converter

Fault Model of Inverter Interfaced Distributed Generator Ado...

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2019 IEEE PES Innovative Smart grid Technologies Asia, ISGT 2019

作者： Wei, Chuanzhi Shi, Xiaohan Zhou, Boxi Liu, Yang Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Jinan China State Grid of China Technology College Jinan China State Grid Shandong Electric Power Research Institute Jinan China

ISBN: (纸本)9781728135205

As the scale of inverter interfaced distributed generator (IIDG) in low-voltage grid expanding, the changes of distribution network's fault characteristics are drawing great attention. The fault modeling method of IIDG gradually becomes an important part of the fault analysis of distribution network with IIDGs. This paper proposed an IIDG fault model considering the current tracking capability of the converter based on the analysis of the dynamic model, control system and parameter design of IIDG. In the proposed model, IIDG was equivalent to a voltage-controlled current source and a voltage- controlled voltage source according to whether the converter current tracks the reference exactly, which reflects the control characteristics of IIDG under different fault conditions. The case studies show that the calculation results based on proposed model are more consistent with electromagnetic transient simulation than that of existing model and have verified the high calculation accuracy as well as simplicity of the proposed model. © 2019 IEEE.

关键词： Electric inverters

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