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Smart power & Internet Energy systems (SPIES), International Conference on

作者： Xiaopan Chen Qi Yang Na Meng Yan Cheng Jiang Wu Guanchu Chen MOEKLINNS Xi’an Jiaotong University Xi’an China Xinjiang Key Laboratory of Whole Process Simulation for Power System Electric Power Research Institute of State Grid Xinjiang Electric Power Co. Ltd. Urumqi China State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute Beijing China

Energy storage is an effective measure to address the renewable energy curtailment problem in large-scale power systems. However, installing the same type of energy storage has limited improvement to the entire system when the total installed capacity of energy storage is fixed. In this paper, an optimal scheduling method for the hydrogen-battery coordination storage system is proposed to further improve renewable energy accommodation by combining the advantages of different types of energy storage. The coupling relationship between the power grid and the heat grid is also considered a way to reduce energy waste. Case tests based on actual operating data analyze the performance of systems with different energy storage configurations. Results indicate the effectiveness of the proposed method. The optimal installed capacity for hydrogen energy storage and battery energy storage is further researched to provide advice for energy storage planning.

关键词： Couplings Renewable energy sources Hydrogen storage Hydrogen Optimal scheduling power grids Planning

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High-performance Full Electromagnetic Transient simulation System of Fujian power Grid and its Application 5

High-performance Full Electromagnetic Transient Simulation S...

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5th IEEE Conference on Energy Internet and Energy System Integration, EI2 2021

作者： Li, Zhicheng Tang, Zhijun Zhang, Dongyuan Chao, Wujie Peng, Xiaoyan Leng, Yongjie Electric Power Research Institute State Grid Fujian Electric Power Co. Ltd Fujian Key Laboratory of Smart Grid Protection and Operation Control Fujian China Electric Power Research Institute State Grid Fujian Electric Power Co. Ltd Fujian Key Laboratory of Smart Grid Protection and Operation Control Fuzhou China Integrated Electronic Systems Lab Co. Ltd. Jinan China

ISBN: (纸本)9781665434256

This paper proposes a high-performance full electromagnetic transient simulation system of Fujian power grid. The system is developed based on the General Transient Simulator (GTS), which is a self-developed electromagnetic transient simulation tool. The key technologies of the simulation system, such as the high-performance automatic parallel computing technology and the large time step electromagnetic transient simulation technology, are introduced. The full electromagnetic transient simulation of the AC power system above lOkV in Fujian power grid based on the dispatching control cloud platform is realized. Study cases are carried out and the validity and accuracy of the simulation are verified by comparing the actual fault recording data and simulation waveforms. © 2021 IEEE

关键词： Transients

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Network-Constrained Unit Commitment with Flexible Temporal Resolution

arXiv

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arXiv 2024年

作者： Yu, Zekuan Zhong, Haiwang Ruan, Guangchun Yan, Xinfei The State Key Laboratory of Power System Operation and Control Dept. of Electrical Engineering Tsinghua University Beijing China The Sichuan Energy Internet Research Institute Tsinghua University China The Lab for Information & Decision Systems Massachusetts Institute of Technology Massachusetts United States

Modern network-constrained unit commitment (NCUC) bears a heavy computational burden due to the ever-growing model scale. This situation becomes more challenging when detailed operational characteristics, complicated constraints, and multiple objectives are considered. We propose a novel simplification method to determine the flexible temporal resolution for acceleration and near-optimal solutions. The flexible temporal resolution is determined by analyzing the impact on generators in each adaptive time period with awareness of congestion effects. Additionally, multiple improvements are employed on the existing NCUC model compatible with flexible temporal resolution to reduce the number of integer variables while preserving the original features. A case study using the IEEE 118-bus and the Polish 2736-bus systems verifies that the proposed method achieves substantial acceleration with low cost variation and high accuracy. Copyright © 2024, The Authors. All rights reserved.

关键词： Energy management

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Evaluation of information value for solar power plants in market environment 4

Evaluation of information value for solar power plants in ma...

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

作者： Wang, Bohong Guo, Qinglai Yang, Tianyu Sun, Hongbin Tsinghua University State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments Tsinghua University Department of Electrical Engineering Beijing100084 China

ISBN: (纸本)9781728196060

Uncertainty is not negligible in power systems, it affects the generation, transmission and utilization of electricity. Especially in electricity markets, the randomness and variability of generation or load will cause notable forecast errors and lead to economic losses of market participants. Due to the data explosion in recent few years, data have gradually become valuable information that can be mined, analyzed, and applied. Meanwhile, the utility that more abundant and accurate information could eliminate uncertainty is emerging. In this paper, solar power plants (SPPs) are selected as the object, the general mechanism in electricity markets is briefly introduced and the corresponding market optimization model is constructed. With the optimization model analytically solved, the impact of uncertainty is analyzed and the expressions of information value are derived. Besides, uniform, normal, logistic, and Laplace distribution are used in the evaluation of information value and compared. Finally, the case study is conducted to verify the theoretical results of information value and illustrate its significance. © 2020 IEEE.

关键词： power markets

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Capacity Configuration of Hybrid CSP/PV Plant for Economical Application of Solar Energy

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Chinese Journal of Electrical Engineering 2020年第2期6卷 19-29页

作者： Fei Li Canbing Li Kai Sun Jiamei Zhang Hua Li State Grid Henan Electric Power Company Economic Research Institute Zhengzhou 450000China College of Electrical and Information Engineering Hunan UniversityChangsha 410082China Department of Electrical Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Lab of Control and Simulation of Power Systems and Generation Equipment Tsinghua UniversityBeijing 100084China Zhangjiakou Power Supply Company Zhangjiakou 075000China

Concentrating solar power(CSP)technology has received increasing attention in recent years because of its distinct advantage for dispatchable power generation from solar ***,owing to its highly levelized costs of electricity,CSP plants are less competitive than photovoltaic(PV)power *** overcome this drawback and suppress PV power fluctuations,the concept of a hybrid CSP/PV power plant is proposed and developed.A capacity configuration method based on filtering and checking is proposed to seek a relationship between the capacity configuration of a hybrid CSP/PV system and the cost of solar ***-content hybrid systems with different ratios of CSP capacity and PV capacity are modeled,and their comprehensive performance is *** and comparisons with a standalone CSP system focused on annual energy generation,capacity factor,levelized cost of electricity,and possibility for loss of power supply show that the hybrid CSP/PV systems possess different features depending on their capacity *** results indicate that the proposed method can supply a convenient and simple operation pattern that favors engineering utilization and extension.

关键词： Concentrating solar power photovoltaic capacity configuration levelized cost of electricity

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Circuit breaker arc fault detection based on fault recording data in HVDC converter station 15

Circuit breaker arc fault detection based on fault recording...

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15th International Conference on Developments in power System Protection, DPSP 2020

作者： Wang, Bin Dong, Xinzhou Yu, Bin Xie, Min Wang, Haigang State Key Lab of Control and Simulation of Power Systems and Generation Equipments Department of Electrical Engineering Tsinghua University Beijing10084 China Anhui Electric Power Company Dispatching Center Anhui Hefei230061 China

ISBN: (纸本)9781713827894

Arc fault occurs easily when circuit breakers (CB) cut the AC filters circuits in HVDC substation frequently. A transient arc model and online detection method are proposed in this paper. The proposed arc model is based on the conventional three stages arc model and Mayr arc model, the simulation results coincide with the actual recorded data well. and also, by utilizing the zero sequence arc current, the online arc detection method based on first order accumulation is introduced. simulation results and actual arc fault data proved the correctness and accuracy of proposed arc fault detection algorithm. © 2020 IET Conference Publications.

关键词： Electric circuit breakers

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Probabilistic evaluation of renewable energy curtailment under forward electricity market 10

Probabilistic evaluation of renewable energy curtailment und...

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2020 10th International Conference on power, Energy and Electrical Engineering, CPEEE 2020

作者： Jiang, Jiheng Qiao, Ying Lu, Zongxiang Ran, Liang Ma, Ming Li, Jin Wang, Feng State Key Lab of Control and Simulation of Power Systems and Generation Equipments Dept. of Electrical Engineering Tsinghua University Beijing100084 China State Grid Gansu Provincial Electric Power Company Lanzhou730000 China Key Laboratory of Wind Power Integration Operation and Control of Gansu Province Lanzhou730070 China

Forward electricity market has emerged as a pivotal section for the electricity transaction to keep stakeholders away from price risk and electricity shortage. But the forward contract of conventional unit partially limits the unit output before operation, leading to the curtailed generation share of renewable energy source (RES). Modeling and assessing this impact is of great significance for system planning and market supervision. The central thesis of this paper is to find out the impact of forward market on RES curtailment. A probabilistic evaluation model for RES accommodation is proposed, taking the curtailment rate as a main evaluation index. We mainly research financial contract and physical contract, modeling the impact of them on thermal unit minimum load capacity and power load in evaluation model. The simulation is conducted in a simplified system, which reveals the change of RES curtailment with renege penalty, contract price and execution generation curve. © 2020 The Authors, published by EDP Sciences.

关键词： power markets

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Capacity Configuration of Battery Energy Storage System for Photovoltaic Generation System Considering the High Chargerate 10

Capacity Configuration of Battery Energy Storage System for ...

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2020 10th International Conference on power, Energy and Electrical Engineering, CPEEE 2020

作者： Li, Jiaming Qiao, Ying Liu, Guojing Lu, Zongxiang State Key Lab of Control and Simulation of Power Systems and Generation Equipments Dept. of Electrical Engineering Tsinghua University Beijing100084 China Economic Institute of Technology State Grid Jiangsu Electric Power Company Nanjing210005 China

Battery energy storage system (BESS) is one of the important solutions to improve the accommodation of large-scale grid connected photovoltaic (PV) generation and increase its operation economy. However, the strong intra-day volatility and severe curtailment of PV power sets a high demand of BESS charge-rate that is a key factor in operation models but ignored in current planning researches. This paper proposes a BESS capacity configuration model for PV generation systems which takes BESS's ability to (dis)charge exceeds its rated power into account. The best charge-rate and power & energy capacity of BESS are optimized by particle swarm optimization (PSO) algorithm. Through an analysis of the annual output statistics of PV power station in the northwest of China, the results show that when considering the high charge-rate of BESS, the optimal BESS capacity configuration rises and comprehensive income of the PV-BESS system will increase. © 2020 The Authors, published by EDP Sciences.

关键词： Battery storage

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power Reconstructing Method of Distributed Photovoltaic Based on the Temporal and Spatial Correlation 10

Power Reconstructing Method of Distributed Photovoltaic Base...

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2020 10th International Conference on power, Energy and Electrical Engineering, CPEEE 2020

作者： Li, Shangqiang Sun, Rongfu Qiao, Ying Lu, Zongxiang State Key Lab of Control and Simulation of Power Systems and Generation Equipment Department of Electrical Engineering Tsinghua University Haidian District in Beijing100084 China State Grid Jibei Electric Power Company Xicheng District in Beijing100031 China

55GW distributed photovoltaic have been installed in China, but nearly half are connected to the low voltage level of 380V, without real-time power data acquisition. The sequential power data is needed to be reconstructed based on some related monitoring data. Current researches focus on outliers recovery, but not reconstruction from none. This paper explores the temporal and spatial correlation of power between adjacent centralized photovoltaic stations and proposes a large-scale missing power data reconstructing method based on the time-delay power correlation, the spatial geometric characteristics of stations and the thought of ensemble learning. Finally, we verify the effectiveness of the proposed method by simulation based on the real photovoltaic power data. The proposed method can get the better effect of data reconstructing compared with the traditional method, which only use the power curves of the nearest CP station to reconstruct the power curves of the DP station according the capacity conversion. © 2020 The Authors, published by EDP Sciences.

关键词： Data acquisition

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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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