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检索条件"机构=State Key Laboratory of Power System Operation and Control Department of Electrical Engineering"

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Stable Economic Model-Predictive control for T-S Fuzzy systems with Persistent Disturbances

Stable Economic Model-Predictive Control for T-S Fuzzy Syste...

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第40届中国控制会议

作者： Mohamed Abdelkarim Abdelbaky Xiangjie Liu Xiaobing Kong state Key Laboratory of Alternate Electrical Power System with Renewable Energy Source North China Electric Power University Department of Electrical Power and Machines Faculty of EngineeringCairo University

The economic performance of a process is generally managed in a hierarchical model-predictive control structure,wherein the low layer fulfills the dynamic tracking performance while the upper layer fulfills the economic ***,this architecture achieves steady-state optimization,but it may ignore the dynamic optimization of this *** contrast,the input and soft-state constraints are important to be satisfied whole the time with guaranteeing a feasible *** that perspective,economic model-predictive control is proposed to demonstrate the performance and the stability of T-S fuzzy systems with persistent *** on fuzzy modeling,online optimal feedback control is designed to guarantee the proposed controller's stability and feasibility through a constrained-MPC problem in linear matrix inequalities *** proposed approach combines economic optimization and the dynamic tracking of the fuzzy control system into a single online framework.A nonlinear numerical example and the boiler-turbine application are utilized to demonstrate the proposed scheme's effectiveness under system load variations and persistent disturbances.

关键词： T-S fuzzy systems boiler-turbine system economic model-predictive control linear matrix inequalities

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The key issue of control strategy for large-scale wind power grid integration 4

The key issue of control strategy for large-scale wind power...

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

作者： Li, Yan Tian, Xinshou Hu, Jianzu Liu, Chao Wang, Cong Xiao, Yu China Electric Power Research Institute China State Key Laboratory of Operation and Control of Renewable Energy Storage Systems Beijing China North China Electric Power University School of Electrical and Electronic Engineering Beijing China

ISBN: (纸本)9781728196060

With integration of the large wind energy bases into power grid, wind energy has gradually become an important form of power supply. In order to ensure the stable operation and safe of the power grid after the large wind energy bases are connected, the operation control technology of the power grid after the large wind enengy bases are connected will become more and more important. Therefore, it is necessary to study the operating characteristics and control strategies of large wind energy bases based on the specific problems of power grids and the large-scale centralized connect to wind power grids, combined with the large wind energy bases already constructed and planned in the Northwest and North China power grids. The technical conditions for wind farms grid-connected operation study, the impact of large wind energy bases in North and Northwest China power Networks on the system operation and stability modes, and the control measures would be include. Technical measures for optimal allocation of reserve capacity, auxiliary decision, power balancing and frequency regulation, suppression of low-frequency oscillation and reactive voltage control for large-scale wind power grid connected power systems would be studied. © 2020 IEEE.

关键词： Electric power transmission networks

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Fault Ride-through Demand of Large-scale Islanded Renewable Energy Connected to VSC-HVDC system and Its key Technologies 4

Fault Ride-through Demand of Large-scale Islanded Renewable ...

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4th International Conference on HVDC, HVDC 2020

作者： Li, Yan Liu, Hongzhi Chi, Yongning Fan, Yiwen Li, Xiangyu Cheng, Fan Wang, Zhibing Wei, Chunxia Xie, Lijun China Electric Power Research Institute China State Key Laboratory of Operation and Control of Renewable Energy Storage Systems Beijing China School of Electrical and Electronic Engineering North China Electric Power University Beijing China

ISBN: (纸本)9781728175935

The adaptability of renewable energy connected to the VSC-HVDC grid will become an important issue affecting grid operation. In particular, the complex interaction between renewable power generation and the power grid brings new challenges to the renewable power generation and VSC-HVDC grid to achieve fault ride-through. Therefore, it is necessary to study the fault ride-through strategies of the VSC-HVDC grid-renewable power generation combined system. According to the operating characteristics and adaptability of renewable energy clusters connected to the VSC-HVDC grid under different faults, this paper proposes technical requirements for high- / low-voltage fault ride-through of renewable power plants that are connected to the grid in island operation, and analyzes key technologies for renewable power generation dealing with AC faults at the sending end of the grid in island integration mode. It is expected to realize joint fault ride-through of renewable energy and VSC-HVDC, thereby increasing the availability of the system, contributing to the safe and stable operation of renewable energy and VSC-HVDC grid, providing technical support for the planning of large-scale renewable energy delivery methods, and effectively guiding the planning and design of renewable energy and VSC-HVDC grid. © 2020 IEEE.

关键词： Electric power transmission networks

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Research on the technology requirement of distributed renewable energy AC/DC output system and network voltage coordinated control 4

Research on the technology requirement of distributed renewa...

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

作者： Li, Yan Liu, Hongzhi Fan, Yiwen Tian, Xinshou Xiao, Yu Wang, Cong China Electric Power Research Institute China State Key Laboratory of Operation Control of Renewable Energy Storage Systems Beijing China North China Electric Power University School of Electrical and Electronic Engineering Beijing China

ISBN: (纸本)9781728196060

Energy is the foundation of the country and determines the economic and social development. The sustainable development of the economy is related to the environmental problems brought about by energy use. The low-carbon development of energy is related to the future of the country. In low-carbon energy, Distributed PV energy is an inexhaustible renewable energy source. High proportion distributed renewable energy intensive connect to the input power network has a serious impact on the voltage stability of the power network, which may lead to voltage fluctuations or even instability of the input power system. The reactive power voltage stability and safety reliability of the input power grid are at great risk. Therefore, it is necessary to carry out voltage control research based on the joint regulation of 'grid-source' diversified equipment, and improve the stability of distributed renewable energy after grid connection from the operational level. On the one hand, the connect to high proportion distributed renewable energy makes the structure of the grid power supply system more complicated, the control variables and constraints also increase, and the system reactive power optimization and corresponding control algorithm requirements are improved. On the other hand, considering the randomness, volatility and unpredictability of the output characteristics of the PV unit, problems such as reactive power, voltage coordinated control and long-distance low-voltage transmission line charging between the units are generated. In this paper, the in-depth study on the coordinated control of distributed renewable energy and the input grid voltage and reactive power is carried out to provide support for the safe and reliable operation of distributed renewable energy power and distribution network. © 2020 IEEE.

关键词： Renewable energy resources

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Research on Capacity Planning of Renewable Energy Grid Integration Based on Effective Short Circuit Ratio

Research on Capacity Planning of Renewable Energy Grid Integ...

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2020 IEEE Sustainable power and Energy Conference, iSPEC 2020

作者： Li, Yan Chi, Yongning Tian, Xinshou Liu, Chao Hu, Jianzu Fan, Yiwen Fan, Xiaojie Xiao, Yu Wang, Cong China Electric Power Research Institute China State Key Laboratory of Operation and Control of Renewable Energy Storage Systems Beijing China School of Electrical and Electronic Engineering North China Electric Power University Beijing China

ISBN: (纸本)9781728191645

In most of the regions of China where large-scale renewable energy is connected to the grid, most of the grid structures are weak, and even local power grids have low voltage levels, weak grid structures, and long-distance small-capacity power transmission. Large-scale renewable energy integration will make the power grid face severe challenges such as capacity planning, integration methods, and transmission channels. The regional power grids connected by renewable energy power stations are mostly in remote areas with relatively distributed loads. The regional power grids have longer transmission lines and the grid is relatively weak. Large-scale renewable energy collection, the cost of different collection methods is different, the impact on the stability of the power system is different, the corresponding protection measures, optimization methods are also different, and these problems need to be solved urgently. The characteristics of the power grid itself are the decisive conditions for determining whether the system can operate stably after the renewable energy grid integration. Under normal condition, the centralized connect to renewable energy is at the end of the grid, which is a typical weak connection system. According to the actual operating experience of renewable energy, the voltage stability of renewable energy power stations is strongly correlated with reactive power. On the one hand, the configuration of the reactive power regulating device in the system is insufficient, and the system loses its ability to control the voltage due to the exhaustion of the reactive power reserve, resulting in voltage instability. On the other hand, the non-global control of each reactive power source device in the system, and the adjustment limit of the discrete equipment gear position increase the reactive power loss of the long-distance transmission line, so that the area requiring reactive support cannot obtain the reactive power supply, it can also cause voltage ins

关键词： Renewable energy resources

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Positive-net-damping stability criterion in subsynchronous oscillation 4

Positive-net-damping stability criterion in subsynchronous o...

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

作者： Ren, Yina Liu, Hui Chen, Lei Min, Yong Wu, Linlin Li, Yunhong Grid-connected Operation Technology for Wind-Solar-Storage Hybrid System State Grid Corporation Key Laboratory State Grid Jibei Electric Power Co. Ltd. Research Institute Beijing China Tsinghua University State Key Lab of Power Systems Department of Electrical Engineering Beijing China

ISBN: (纸本)9781728196060

In recent years, the subsynchronous oscillation has arouse wide attention, and the oscillation of turbo-generator will cause serious influence. In general, the eigenvalue method and time domain simulation method are often used to analyze. The two methods focus on the system overall stability, and detailed structure and parameters of each element are required. However, the influence of components on oscillation is often difficult to obtain. In this paper, the positive-net-damping method is used to analyze the influence of the line on the torsional vibration. This method combines the complex torque coefficient method and Nyquist criterion, and divides the whole system into mechanical and electrical subsystems. Then the influence of each component on the damping coefficient can be obtained explicitly. After derivation and simulation verification, the system stability becomes worse at complementary frequency of line resonance frequency, and the line resistance may lead to poor stability. © 2020 IEEE.

关键词： Damping

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A Static Voltage Stability Margin Evaluation Approach for Coordinated operation of Grid-Tied Wind power, PV and Energy Storage Stations

A Static Voltage Stability Margin Evaluation Approach for Co...

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Annual Conference of Industrial Electronics Society

作者： Qipeng Zheng Fei Gao Kai Hou Yingwei Jiang Guozhong Zhang Wenqi Dong Ministry of Education Department of Electrical Engineering Key Laboratory of Control of Power Transmission and Conversion Shanghai Jiao Tong University Shanghai China NARI Group Corporation State Grid Electric Power Reserarch Institute Jinagsu China State Grid Jibei Zhangjiakou Wind and Solar Energy Storage Storage and Transportation New Energy Co.Ltd Hebei China

Static voltage stability of power grids will become more sensitive to the coordinated operation of renewable energy resources (RESs) and energy storage systems (ESSes) due to their different output characteristics. This paper presents a generalized approach for static voltage stability evaluation under coordinated operations of wind power, PV and energy storage stations. First, a combined model for coordinated operation of stations which describes the output characteristics of active and reactive power is established. Then, the integration point of stations is optimized by modal analysis such that the most sensitive bus in the system can be located. Afterwards, the static voltage stability margin can be evaluated for load buses via impedance modulus margin index (IMMI). Furthermore, impact of penetration rates and penetration rate ratio among wind power, PV and energy storage stations on static voltage stability margin is investigated. To validate the effectiveness of proposed method, a standard IEEE 14 bus test system is studied and numerical results are presented.

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Study on the Acute Inhalation Toxicity of Eco-friendly Gas Insulating Medium C5-PFK 22

Study on the Acute Inhalation Toxicity of Eco-friendly Gas I...

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22nd International Symposium on High Voltage engineering, ISH 2021

作者： Li, Yalong Zhang, Xiaoxing Wei, Zhuo Wang, Yi Li, Yi Xiao, Song Department of Electrical Engineering and Automation Wuhan University Wuhan China GREMI UMR 7344 CNRS Université d'Orléans 14 Rue d'Issoudun Orléans45067 France Hubei Key Laboratory for High-Efficiency Utilization of Solar Energy and Operation Control of Energy Storage System Hubei University of Technology Wuhan China

ISBN: (纸本)9781839536052

The eco-friendly insulating gas C5-PFK is considered promising to replace SF6 as an insulating medium in gas-insulated equipment. At present, there are few reports on the acute inhalation toxicity of C5-PFK gas, leaving hidden dangers for related scientific research and engineering applications. In this paper, by setting up an eco-friendly gas insulating medium acute inhalation test platform, with experimental mice as the research object, a 4h acute inhalation toxicity test study of C5-PFK gas was carried out according to the OECD403 test guide. The study found that after acute inhalation of low-concentration C5-PFK gas, mice will experience symptoms such as excitement, heartbeat and shortness of breath, but will return to normal after a few hours. There will be no abnormalities during the 14-day observation period and their physical condition is good. After acute inhalation of high-concentration C5-PFK gas, mice will become paralyzed and lose their ability to move independently, leading to death. The LC50 of 4h acute inhalation of C5-PFK gas in mice was 7400-7500ppm (female) and 8600-8800ppm (male). The acute toxicity of C5-PFK gas should be classified as the lowest toxic category 4 in the GHS, which is a low-toxic gas. © 2021 The Institution of engineering and Technology.

关键词： Sulfur hexafluoride

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Short-Term Wind power Prediction Based on Wavelet Transform and Convolutional Neural Networks

Short-Term Wind Power Prediction Based on Wavelet Transform ...

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

作者： Xiaosheng, Peng Kai, Cheng Bo, Wang Jianfeng, Che Qiyou, Xu Fan, Yang Wenze, Li Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Wuhan430074 China State Key Laboratory of Operation and Control of Renewable Energy Storage Systems China Electric Power Research Institute Beijing100192 China

ISBN: (纸本)9781728143033

Wind power prediction (WPP) is critical to the safe operation and economic dispatch of power systems, but it faces two challenges: 1) Information on different frequency bands is included in the numerical weather prediction (NWP) data, making it difficult to mine vital information if the original NWP data is directly applied as input data;2) There is a strong nonlinear relationship between the input and output data in the WPP model, meaning that traditional models are difficult to fit accurately. This paper proposes a new short-term WPP model based on wavelet transform (WT) and convolutional neural networks (CNN). First, WT is applied to split the original NWP data and historical power data into multiple sets of different frequency components. Then, based on the NWP and historical power data sets of relevant frequencies, CNN models are established for prediction. Finally, based on the prediction results of different frequency components, inverse WT is applied to reconstruct the WPP results. This case study shows that 1) the WT method allows for effective mining of the information contained in the different frequency components of the NWP data;and 2) when the WT-CNN model is applied to predict the wind power in the next 12 hours, the NRMSE of the model is reduced by 1.55 percentage points compared with Back Propagation Neural Network. © 2020 IEEE.

关键词： Wavelet transforms

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A Three-Stage Ensemble Short-Term Wind power Prediction Method Based on VMD-WT Transform and SDAE Deep Learning

A Three-Stage Ensemble Short-Term Wind Power Prediction Meth...

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

作者： Xiaosheng, Peng Zuowei, Zhang Qiyou, Xu Bo, Wang Jianfeng, Che Fan, Yang Wenze, Li Zian, Huang Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Wuhan430074 China China Electric Power Research Institute State Key Laboratory of Operation and Control of Renewable Energy Storage Systems Beijing100192 China

ISBN: (纸本)9781728143033

Accurate wind power prediction (WPP) will contribute not only to the economic dispatching of power system but also to the safe and stable operation of the power grid. A novel three-stage ensemble short-term WPP method is proposed in this paper to effectively improve the WPP accuracy. First, in stage one, variational mode decomposition (VMD) and wavelet transform (WT) are applied to decompose the original wind power sequence into multiple subsequences. Second, in stage two, multiple stacked denoising auto-encoders (SDAE) are constructed based on the subsequences to perform WPPs separately. Third, in stage three, and the support vector machine (SVM) is applied to assign weights to each sub-prediction value to obtain the final ensemble prediction result. The case study shows that, compared with back propagation neural network (BPNN) and SVM, the average normalized root mean square error (NRMSE) and normalized mean absolute error (NMAE) of proposed ensemble WPP method, in the step range of12 hours, are reduced by 19.66% and 19.91% compared to BPNN, and 14.43% and 14.65% compared to SVM, respectively, which illustrates the effectiveness and advancement of the proposed method. © 2020 IEEE.

关键词： Variational mode decomposition

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