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Coordinated Scheduling of Frequency Regulation Resources Based on the Coordination Coefficient

Coordinated Scheduling of Frequency Regulation Resources Bas...

引用

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

作者： Dezheng Liu Jianxiang Qin Long Yang Hanxiang Wang Ying Wang Kaifeng Zhang Key Laboratory of Measurement and Control of CSE Ministry of Education Southeast University Nanjing China Dispatching Control Center of Ningxia Electric Power State Grid Ningxia Electric Power Co. Ltd. Yinchuan China

With the development of renewable energy, the proportion of electricity generation capacity from conventional power generation units is steadily decreasing, resulting in insufficient frequency regulation resources which are usually provided by conventional power units. Therefore, there is a growing need for coordinating multiple types of frequency regulation resources to fulfill the frequency regulation tasks. However, the reliability of load side frequency regulation resources is limited, so it is necessary to coordinate the proportion of load side resources and traditional resources. Firstly, the concept of coordination coefficients is proposed in this paper, which is used to limit the proportion of resources on load side to the whole frequency regulation resources. Secondly, a two-layer optimization model of day-ahead market clearing based on coordination coefficients is established. The upper layer takes the balance of resource unit income between the generation side and the load side as the optimization objective, and the lower layer takes the lowest market clearing cost as the optimization objective, to optimize the coordination coefficients of long-term operation income balance. Finally, through the simulation of the IEEE system example in Matlab, it is verified that when the coordination coefficient is 0.13, the resource of the generation side and load side can achieve the unit income balance while ensuring the minimum cost of resource scheduling.

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Stochastic Optimal Scheduling Study of Virtual power Plant Based on Multiple Distributed Resources

Stochastic Optimal Scheduling Study of Virtual Power Plant B...

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Electronics and Devices, Computational Science (ICEDCS), International Conference on

作者： Jianbin Lu Wenchuan Meng Shuai Han Ning Wu Zaimin Yang Siyang Sun Electric Power Research Institute of Guangxi Power Grid Co. Ltd. Guangxi Key Laboratory of Intelligent Control and Maintenance of Power Equipment Nanning China Energy Development Research Institute China Southern Power Grid Guangzhou China China Southern Power Grid Energy Development Research Institute Guangzhou China

ISBN: (数字)9798331527624

ISBN: (纸本)9798331527631

In the realm of distributed energy operation research, the virtual power plant emerges as a potent strategy to account for system uncertainties and enhance profits for all stakeholders. This paper considers uncertainties related to cybersecurity constraints, electrical and thermal loads, wind speed variations, and market tariff fluctuations. Subsequently, the optimal scheduling challenge for a virtual power plant incorporating multiple distributed resources is formulated utilizing the Generalized Algebraic Modeling System (GAMS) within the IEEE 33 Bus Distributed Test System, and is resolved through the CLPEX solver. Simulation outcomes reveal that the integration of a photovoltaic solar thermal system bolsters the expected profitability of the system and diminishes the virtual power plant's reliance on boilers and cogeneration units.

关键词： Photovoltaic systems Uncertainty Wind speed Cogeneration Tariffs Stochastic processes Optimal scheduling Virtual power plants Thermal loading Stakeholders

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Modeling of Doubly Fed Wind power Generation System and Simulation Study on grid-Connection Stability

Modeling of Doubly Fed Wind Power Generation System and Simu...

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intelligent power and Systems (ICIPS), International Conference on

作者： Jingyue Zhang Jie Zhang Yufeng Hu Yuanhong Lu Libin Huang Yanjun Zhao Haiping Guo State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid Guangzhou 510663 China Southern Power Grid Guangzhou China National Energy Power Grid Technology R&D Centre Guangzhou 510663 China Southern Power Grid Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou 510663 China Southern Power Grid Guangzhou China CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou 510663 China Southern Power Grid Guangzhou China National Energy Power Grid Technology R&D Centre Guangzhou 510663 Guangzhou China

ISBN: (数字)9798331532765

ISBN: (纸本)9798331532772

Addressing the stability challenges posed by the unpredictability and intermittent nature of wind power output during grid integration, and aiming to enhance the understanding of factors influencing grid stability upon wind power system connection and to implement efficient control measures, a grid- connected model of a doubly fed induction generator (DFIG) was established utilizing a customized version of the RTRES (Real-Time power System Simulation) software, specifically designed for emerging power systems and aligned with wind farm realities. Stability simulations for grid connection were conducted under both voltage regulation mode and reactive power regulation mode across a range of wind speeds, revealing distinct technical behaviors. The findings suggest that the generator's terminal voltage, terminal current, active power, reactive power, and rotor speed exhibit strong correlations with variations in wind speed, and that all parameters are capable of stabilizing following initial disturbances.

关键词： Reactive power Wind speed Rotors power system stability Wind power generation Stability analysis Software Regulation Wind turbines Voltage control

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Visual Servo control Method for Transmission Line Robot Hanging Line Operation

Visual Servo Control Method for Transmission Line Robot Hang...

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IEEE International Conference on Information Communication and Signal Processing (ICICSP)

作者： Wenji Zhu Weihua Ban Lin Zou Xu Liu Guangxi Key Laboratory of Intelligent Control and Maintenance of Power Equipment Electric Power Research Institute of Guangxi Power Grid CoLtd Nanning China Baise Power Supply Bureau Baise City Guangxi Baise China Southern Power Grid Scientific Research Institute Guangzhou China

ISBN: (数字)9798350355895

ISBN: (纸本)9798350355901

With the rapid development of China's electric power industry, the ensuing maintenance and overhaul work has become more and more burdensome. The traditional manual overhaul method has the problems of high risk and low efficiency, so it becomes very necessary to study the transmission line power-carrying operation robot. At present, the development of transmission line robots is rapid, but how to deploy robots safely and efficiently to transmission lines is still a very urgent problem. In this paper, we propose a visual servo control method for transmission line robot hanging line operation to address this problem, using binocular camera to measure the vertical distance between the robot and the transmission line, and using DeepLabV3+semantic segmentation network to identify the gap between the walking wheels and the transmission line, to ensure that the robot hangs on the transmission line safely. Finally, a robot hanging line operation experiment was carried out in the transmission line experimental site to verify the effectiveness and practicality of the visual servo control method proposed in this paper.

关键词： Legged locomotion Visualization power transmission lines Service robots Robot vision systems Wheels Signal processing Transmission line measurements Wire Servosystems

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A High Precision location method for Substation personnel based on the Fusion of 3D Real-scene Map and foot Detection

A High Precision location method for Substation personnel ba...

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Artificial Intelligence and Electromechanical Automation (AIEA), International Conference on

作者： Yubo Zhang Yufeng Lu Wei Zhang Xu Liu Guangxi Key Laboratory of Intelligent Control and operation and Maintenance of Power Equipment Electric Power Research Institute of Guangxi Power Grid Co. Nanning China Electric Power Research Institute of Guangxi Power Grid Co. Nanning China Southern Power Grid Research Institute Co. Ltd Guangzhou Guangdong China

ISBN: (数字)9798350366174

ISBN: (纸本)9798350366181

The existing personnel positioning methods require wearing transmitting devices on personnel and installing receiving devices inside substations, which cannot meet the accuracy requirements of personnel positioning in complex scenarios of substations. This article applies ankle joint detection to personnel positioning. Firstly, YOLOV4 tiny is used for personnel detection, followed by OpenPose for ankle joint point detection. Then, based on camera extrinsic parameters, the two-dimensional coordinates of the ankle joint point are mapped to a three-dimensional real-world map. Finally, the personnel positioning information is obtained. Due to the closer distance between the ankle joint and the ground, the positioning is more accurate, and the average confidence level of target recognition is 0.95, The recognition accuracy is 100%, the average positioning error is 0.05 m, and it can reach 0.02 m in key areas, fully meeting the actual needs of risk control for substation operators. The application of three-dimensional realistic maps combined with ankle joint detection in substation personnel positioning can not only achieve efficient, accurate, and stable personnel positioning, but also improve the intelligence and level of personnel positioning strategies.

关键词： Ankle Substations Accuracy Three-dimensional displays Target recognition Reliability theory Cameras Real-time systems Personnel Artificial intelligence

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Model for Quantifying Reliability Contribution of Distribution System with Distributed Generation Based on Shapley Value

Model for Quantifying Reliability Contribution of Distributi...

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International Conference on power and Energy Technology (ICPET)

作者： Wei Zhang Yangjun Zhou Chenying Yi Juntao Pan Weixiang Huang Shan Li Bin Feng Yuanchao Zhou Guangxi Key Laboratory of Intelligent Control and Maintenance of Power Equipment Electric Power Research Institute of Guangxi Power Grid Co. Ltd. Nanning China Guangxi Power Grid Co. Ltd. Nanning China Nanning Power Supply Bureau of Guangxi Power Grid Co. Ltd. Nanning China

ISBN: (数字)9798350375855

ISBN: (纸本)9798350375862

In the power system, power outages are usually caused by the distribution system. Therefore, it is necessary to allocate the system reliability indexes to each component, so as to identify the components that have great influence on the system reliability, and to optimize them in order to improve the system reliability. In this paper, firstly, multi-state output power model of distributed generation is established, using historical distributed generation data. Then, based on Shapley value, the system reliability indexes are allocated to each component, and by standardizing them, the contribution rate of each component to the system index can be obtained. Finally, a distribution system for RBTS Bus 6 is introduced as standard case to demonstrate the validity of the proposed method. By analyzing the calculation results, it can be obtained that the component contribution rate is related to the size of the component reliability parameters and the location of the component.

关键词： power supplies Distributed databases Probability Transformers Distributed power generation power system reliability Reliability Indexes Resource management Standards

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Research on Signal Extraction and control Strategy of Single-Phase PWM Rectifier in d-q Coordinate Frame

Research on Signal Extraction and Control Strategy of Single...

引用

International Conference on Wireless power Transfer, ICWPT 2022

作者： Gong, Lieqian Fu, Guanggang Wang, Xin Tang, Mengyang Liao, Wu Miao, Yiru State Grid Wenzhou Power Supply Company Limited Wenzhou325000 China College of Electrical and Information Engineering Hunan University Changsha410082 China Key Laboratory of Smart Grid and Intelligent Control in Nanchong Southwest Petroleum University Nanchong637001 China Chengdu Guojia Electriacal Engineering Co. Ltd. Chengdu611756 China

ISBN: (纸本)9789819906307

There are some AC time-varying physical quantities in single-phase PWM rectifier, as a result, it is difficult to design control system. a current inner loop-voltage outer loop control strategy is implemented by establishing the math model in d-q synchronous frame. The grid voltage contains abundant harmonics, which seriously affects the detection accuracy of the voltage phase, and the virtual component of grid-side current cannot be directly sampled, so a discrete extraction method for the fundamental component of the grid voltage without phase-locked loop is proposed. Simulation and experimental results show that under different loads, the output voltage of the rectifier can accurately follow the given, and the dynamic performance is good. The grid-side current and electromotive force maintain unit power factor operation, which proves the virtual current detection method and control strategy proposed in this paper is feasibility and correctness. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Extraction

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Dynamic Reliability Evaluation Method of Distribution System with Distributed Generations Based on Sparse Polynomial Chaos

Dynamic Reliability Evaluation Method of Distribution System...

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Energy Engineering and power Systems (EEPS), International Conference on

作者： Chenying Yi Yangjun Zhou Wei Zhang Weixiang Huang Shan Li Bin Feng Yuanchao Zhou Juntao Pan Liwen Qin Guangxi Key Laboratory of Intelligent Control and Maintenance of Power Equipment Electric Power Research Institute of Guangxi Power Grid Co. Ltd. Nanning China Guangxi Power Grid Co. Ltd. Nanning China Nanning Power Supply Bureau of Guangxi Power Grid Co. Ltd. Nanning China

ISBN: (数字)9798350375138

ISBN: (纸本)9798350375145

In order to address the fossil fuel crisis and climate change issues, vigorously developing renewable energy has become the dominant direction for the global energy low-carbon transition. However, with the large-scale access of distributed generations such as photovoltaic panels and wind turbines, the safe and reliable operation of the distribution system faces severe challenges. Therefore, it is necessary to propose a rapid reliability evaluation method to provide a decision basis for operation dispatchers. This paper proposes a dynamic reliability evaluation method for distribution systems based on sparse polynomial chaos (PC). Firstly, a PC model is established using historical power output of each distributed generation and its corresponding system reliability index. Then, the least angle regression (LAR) method is used to screen out the items in the polynomial that have the greatest impact on the output response, achieving the sparseness of the polynomial and efficient reliability dynamic evaluation. A distribution system for RBTS Bus 6 is introduced as standard case to demonstrate the accuracy of calculating the system reliability index and the effectiveness of reducing the terms of polynomials and alleviating the dimension disaster problem of PC method.

关键词： Chaos Accuracy Disasters Predictive models Polynomials Distributed power generation Numerical models power system reliability Reliability Indexes

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LVRT During-fault-stage Equilibrium Point is Unnecessary for Renewable grid-tied Systems

LVRT During-fault-stage Equilibrium Point is Unnecessary for...

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power System and Green Energy Conference (PSGEC)

作者： Yayao Zhang Min Cheng Meng Zhan Jiawei Yu Yihua Zhu Mingkang Wu State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan China Yunnan Power Grid China State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid China National Energy Power Grid Technology R&D Centre Electric Power Research Institute China Southern Power Grid China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Electric Power Research Institute China Southern Power Grid China

ISBN: (数字)9798350365573

ISBN: (纸本)9798350365580

Transient synchronous stability of renewable grid- tied systems is of paramount importance. Most of previous studies focused on the grid-tied converter in the low voltage ride through (LVRT) during-fault stage and performed stability analysis based on the belief that if the system has (or has no) a stable equilibrium point in the during-fault stage, the system will be stable (or unstable). Therefore, it has been broadly accepted that the existence and/or stability of equilibrium point in the during-fault stage is necessary. However, the whole LVRT contains four different stages and the during-fault stage is only one among them. The transient synchronous stability of whole system should be determined by the initial state in the late post-fault stage and the attraction basin of its equilibrium point. The late post-fault stage is essential for stability and all four stages are important. Clearly treating the during-fault stage as the whole LVRT stages makes the nonlinear switched dynamics problem be greatly simplified and, certainly, is incomplete. In order to clarify this point, this paper analyzes the influence of existence (or nonexistence) of equilibrium point in the during-fault stage on the transient synchronous stability of permanent magnet synchronous generator grid-tied system. We can find that the existence of an equilibrium point in the during-fault stage is only a sufficient condition, rather than a necessary condition. The theoretical analysis is also verified in the hardware-in-the-loop experiment Therefore, a large number of previous studies and results on the transient synchronous stability of renewable grid-tied systems are incomplete and questionable.

关键词： Sufficient conditions Stability criteria Switches Voltage power system stability Synchronous generators Permanent magnets Nonlinear dynamical systems Transient analysis Magnetic switching

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A Coordinated Optimization Method for Source-Load-Storage in Renewable power System Considering Overcharge/Overdischarge Cost of Stored Energy

A Coordinated Optimization Method for Source-Load-Storage in...

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IEEE Information Technology, Networking, Electronic and Automation control Conference

作者： Tianyu Guo Libin Huang Haiping Guo China Southern Power Grid 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 China Southern Power Grid CSG Key Laboratory for Power System Simulation Electric Power Research Institute Guangzhou China

Building a renewable power system with renewable energy as the main part can give full play to the regulatory capacity of sources, network, loads, storage and other types of controllable resources. It is the key to promoting clean energy transformation and achieving the goal of carbon peaking and carbon neutralization, and has become a research hotspot in the energy field. In this paper, a coordinated optimization method for source load storage in renewable power system considering overcharge/overdischarge cost of stored energy is proposed. Two State of Charge (SOC) thresholds for the energy storage are set, when the SOC exceeds the corresponding threshold, the cost of overcharge/overdischarge penalty is added respectively to effectively balance the security and regulation capability of energy storage; Then, set the wind/light abandonment cost and the demand response cost of adjustable load, to coordinate the output of source, load and energy storage, to improve the regulation capacity of the renewable power system. Finally, the correctness and rationality of the method proposed in this paper are effectively verified.

关键词： Renewable energy sources Wind Costs Optimization methods Regulation Demand response power systems

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