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检索条件"机构=Key Laboratory of Intelligent Dispatching and Control of Power Grid"

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Interface Optimization Scheme Under Semi-Implicit Delay Decoupling Method

Interface Optimization Scheme Under Semi-Implicit Delay Deco...

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2024 8th International Conference on Electrical, Mechanical and Computer Engineering (ICEMCE)

作者： Xiaoshan Wu Ligang Zhao Yinsheng Su Qian Ma Huifan Xie State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid Company Limited Guangzhou China Power Dispatching and Control Center China Southern Power Grid Company Limited Guangzhou China

ISBN: (数字)9798331506230

ISBN: (纸本)9798331506247

There exist various universal forms of semi-implicit delay decoupling. The semi-implicit delay decoupling within the state space scheme possesses second-order accuracy, yet the selected state variables must be mutually independent. When employing the nodal voltage method, the synchronization requirement of the nodal voltage method contradicts the delay characteristics of the non-semi-implicit delay-coupling model. To address this issue, a semi-implicit decoupling data interface enhancement algorithm was developed. In this paper, a semi-implicit decoupling model was constructed for the VSC converter, enabling the decoupling of the ac and dc terminals. On this basis, in accordance with the characteristics of the interface circuit, an exponential analytical solution was derived, and the interface algorithm was obtained by integrating with the decoupling model. Finally, the improved algorithm proposed herein was verified through digital examples. This algorithm improves the implicit decoupling method to a certain extent.

关键词： Hands Accuracy Capacitors Voltage Delays Topology Iterative methods Synchronization Integrated circuit modeling Transient analysis

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Simulation Research on Primary Frequency Regulation Coordination control Strategy of Hybrid Wind-PV-ES power Station Based on AGC 12

Simulation Research on Primary Frequency Regulation Coordina...

引用

12th Annual Meeting of CSEE Study Committee of HVDC and power Electronics, HVDC 2023

作者： Li, Shengnan Hu, Yun He, Xin Zhu, Yihua He, Tingyi Luo, Chao Deng, Can Zeng, Guanming Su, Mingzhang Yunnan Electric Power Research Institute Kunming China National Energy Power Grid Technology R&D Centre Guangzhou China State Key Laboratory of HVDC Electric Power Research Institute CSG 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 GridGuangzhou China

ISBN: (纸本)9781839539848

With the increase of wind and solar renewable energy penetration in power system, the frequency control ability of power system completely depending on traditional power supply has weakened. This actuality requires that renewable energy stations should be equipped with a certain amount of energy storage to improve the primary frequency control ability. This paper considers the fast response ability and flexible control of energy storage for both charging and discharging, as well as its unique frequency response characteristics. Firstly, the control characteristics of the primary frequency regulation of the hybrid wind-solar-storage power station(Wind-PV-ES) are analyzed. By improving the automatic generation control(AGC) strategy of the hybrid Wind-PV-ES power station, a coordinated control strategy for the primary frequency regulation of the hybrid Wind-PV-ES power station is proposed for different frequency ranges based on the improved AGC control. After the primary frequency regulation action, the energy storage output is given priority control before wind and solar. When the energy storage active margin is insufficient, use the frequency regulation capacity of wind and photovoltaic power system to improve the primary frequency regulation capacity of the hybrid Wind-PV-ES power station. The control strategy proposed in this paper can improve the primary frequency regulation capability of renewable energy station. Finally, the paper verifies the effectiveness of the proposed control strategy through simulation. © The Institution of Engineering & Technology 2023.

关键词： Energy storage

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Hydrodynamics and Thermal Characteristics of power Transformer with Natural Ester Oil on Offshore Platform

Hydrodynamics and Thermal Characteristics of Power Transform...

引用

2022 IEEE International Conference on High Voltage Engineering and Applications, ICHVE 2022

作者： Lei, Zhang Dajian, Li Yuan, Ma Jian, Zhao Xiajin, Rao Liangyuan, Chen Electric Power Research Institute of Guangxi Power Grid Co. Ltd. Guangxi Key Laboratory of Intelligent Control and Maintenance of Power Equipment Guangxi Nanning530000 China

ISBN: (纸本)9781665407502

In view of the green and environmentally-friendly properties of natural ester oil, it is suitable for offshore platform transformers. Thermo-fluid dynamics simulations for the 220kV power transformer cooled by natural ester oil working in ONAN mode are carried out in 2D model. The effects of disks washer structure for oil flowing in the form of the unidirectional flow in the groups of horizontal channels have been revealed. The computation temperature rises of natural ester oils and mineral oils were analyzed and compared with the measurements. The simplification of the model is also explained, this provides a reference for thermal compact design of offshore platform transformer cooled by natural ester oil. © 2022 IEEE.

关键词： power transformers

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Effect of Battery Energy Storage System Frequency Regulation on Frequency Characteristic of power Systems

Effect of Battery Energy Storage System Frequency Regulation...

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2022 IEEE International Conference on power Systems and Electrical Technology, PSET 2022

作者： Deng, Lijun Huang, Libin Cai, Haiqing Hu, Yun Liao, Mengjun Huang, Yunhui China Southern Power Grid Research Institute Co. Ltd Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China Wuhan University of Technology Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Wuhan China

ISBN: (纸本)9781665489157

This paper investigates the impact of battery energy storage system (BESS) frequency regulation on frequency characteristic of power systems. To begin with, a model of BESS participating in frequency regulation of power systems is established for analyzing effects of BESS control dynamics on grid frequency characteristic. And the analysis model is proved by comparison with time domain model. Furthermore, grid frequency characteristic analysis with including BESS frequency regulation is studied. Virtual inertia control and virtual inertia frequency control of BESS are investigated for Participate in power grid frequency regulation. Finally, Influence of energy storage inertia and primary frequency regulation control on system frequency characteristics are investigated in Matlab/Simulink. © 2022 IEEE.

关键词： Battery storage

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Energy Storage Cluster Planning Method Accelerated by Progressive Hedging Algorithm Considering Uncertainty in Renewable Energy and Load

Energy Storage Cluster Planning Method Accelerated by Progre...

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power Science and Technology (ICPST), IEEE International Conference on

作者： Weihua Wang Shuai Zhao Yingming Lin Yang Liu Pingping Xie Yiran Li Gengfeng Li Electric Power Dispatching and Control-Center Guangdong Power Grid Co. Ltd. Guangzhou China Smart Grid Key Laboratory of Shaanxi Province Xi’an Jiaotong University Xi’an China

ISBN: (数字)9798350349030

ISBN: (纸本)9798350349047

The high proportion of renewable energy presents numerous new features in the power system, which poses new challenges for the planning and operation of the power system. The energy storage system is an important technology and basic equipment to support the construction of the new power system under the dual carbon goals. Rational configuration of energy storage cluster can effectively improve the operation of the power system. To solve the issue that the current requirements on the energy storage cluster scale of power systems with substantial renewable energy output are too general to provide a suitable energy storage cluster configuration scheme, this paper proposes an energy storage cluster planning method to describe the uncertainty of renewable energy output and load. Considering the characteristics of the system, the proposed method is formulated as a stochastic programming model to plan the energy storage cluster. The progressive hedging algorithm is employed to solve the proposed model. Finally, the modified IEEE RTS79 test system is used to verify the method, and the best RER range is obtained.

关键词： Renewable energy sources Uncertainty Systems operation Clustering algorithms Stochastic processes Wind power generation power systems

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Cost-Benefit Analysis Method for Disaster Prevention and Restoration Resource Investment in power Systems Based on Resilience Assessment

Cost-Benefit Analysis Method for Disaster Prevention and Res...

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

作者： Jianjun He Longteng Wu Zijie Meng Xin Hu Xinlei Cai Yiheng Bian Gengfeng Li China Southern Power Grid Power Dispatching and Control Center China Southern Power Grid Guangzhou China Guangdong Power Grid Corporation China Southern Power Grid Guangzhou China State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University Xi’an China

ISBN: (数字)9798331523527

ISBN: (纸本)9798331523534

A resilient power system is crucial for ensuring the power stability and safety. Pre-allocating flexible resources ensures of power system’s reliable supply. This article studies an analysis method for resource investment from an angle of cost-effectiveness. A probabilistic resilience assessment method is used to evaluate performance during the disaster. The life cycle cost model is also applied to analysis. The proposed framework offers guidance to power system in resource investment planning.

关键词： Disasters Prevention and mitigation System integration power system stability Probabilistic logic Stability analysis power system reliability Cost benefit analysis Resilience Investment

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Deep neural network based interpolation of sparse samples for time-dense power load forecasting 4

Deep neural network based interpolation of sparse samples fo...

引用

4th International Conference on Computer Engineering and Application, ICCEA 2023

作者： Li, Bo Zhao, Ruifeng Lu, Jiangang Xin, Kuo Huang, Jinhua Lin, Guanqiang Chen, Jinrong Pang, Xueyue Wu, Shunxin Electric Power Dispatching and Control Center of Guangdong Power Grid Co. Ltd. Guangdong Guangzhou China Electric Power Dispatching and Control Center of China Southern Power Grid Co. Ltd. Guangdong Guangzhou China Electric Power Research Institute of Guangdong Power Grid Co. Ltd. Guangdong Guangzhou China Huizhou Power Supply Bureau of Guangdong Power Grid Co. Ltd. Guangdong Huizhou China Foshan Power Supply Bureau of Guangdong Power Grid Co. Ltd. Guangdong Foshan China China Energy Engineering Group Guangdong Electric Power Design Institute Co. Ltd. Guangdong Guangzhou China School of Electrical Engineering Chongqing University State Key Laboratory of Power Equipment & System Security and New Technology Chongqing China

ISBN: (纸本)9798350347548

Large amount of power load data with high-sampling rate plays a crucial role in the training of time-dense power load forecasting network. However, in many cases, there is a large amount of data with low-sampling rate, which can't directly train a time-dense forecasting network. Therefore, this paper proposes a deep learning based dataset interpolation method, which uses the available high-sampling rate power load datasets to train a dataset interpolation network, then interpolates the low - sampling rate datasets with trained network to obtain high-sampling rate datasets, and finally uses the interpolated datasets for time-dense forecasting network training. The results show that the data obtained based on the method proposed in this paper fits the ground-truth closer than the traditional interpolation, and the results of the network trained based on this dataset are more accurate in the subsequent forecasting tasks. © 2023 IEEE.

关键词： Interpolation

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Virtual inertia control strategy for PV using DC capacitive and electrochemical energy storage 4

Virtual inertia control strategy for PV using DC capacitive ...

引用

4th IEEE International Conference on power, intelligent Computing and Systems, ICPICS 2022

作者： Jiang, Zhe Ma, Linlin Gao, Zhimin Cao, Yongji Qin, Hao Yang, Dong Ma, Huan Fang, Qiao State Grid Shandong Electric Power Research Institute State Grid Shandong Electric Power Company Jinan China Shandong Power Dispatch & Control Center State Grid Shandong Electric Power Company Jinan China Key Laboratory of Power System Intelligent Dispatch and Control of the Ministry of Education Shandong University Jinan China

ISBN: (数字)9781665467735

ISBN: (纸本)9781665467735

With the increasing penetration of renewable energies, the power system inertia is decreasing, and there is an urgent need for wind and PV generations to participate in frequency response. PV units are stationary power generating units and usually work in maximum power tracking mode. It is difficult to provide inertia support to enhance the power system frequency characteristics. Therefore, this paper proposes a frequency control strategy based on the DC capacitor energy storage on the high voltage side of PV generation, using its transient discharge process to make it participate in the frequency response. Considering the limited energy stored in the capacitor, droop control and virtual inertia control are added to the electrochemical energy storage for inertia compensation, and a cooperative inertia control strategy is proposed for PV and energy storage system. A case study is carried out to verify the effectiveness of the proposed control strategy. © 2022 IEEE.

关键词： Frequency response

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Equivalence and Transient Characteristics of Flexible DC Converter after AC Fault

Equivalence and Transient Characteristics of Flexible DC Con...

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International Conference on power System Technology (powerCON)

作者： Tao Wen Qingrui Tu Wei Liu Wenbo Wang Ningjing Bu Jiawei He Electric Power Dispatching Control Center Guangdong Power Grid Guangzhou China Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin China

Flexible DC transmission systems can renewable energy consumption and improve power supply reliability. However, the control response and topology of flexible DC converter leads to a different fault output from conventional synchronous generator. Based on topology and control strategy, the controller response of flexible DC converter after AC fault is analyzed, and the equivalence of converter is proposed from the view of sequence component. The results show that positive-sequence equivalence is a current source, and its output satisfies the second order non-flush differential equation and is over-damped. Negative-sequence equivalence is an open circuit under suppression strategy. Zero-sequence equivalence is determined by grounding scheme of transformer windings and is not affected by control strategy.

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Nonlinear Modeling of the VSC grid-Connected System with controller Saturation 4

Nonlinear Modeling of the VSC Grid-Connected System with Con...

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4th International Conference on Electrical Engineering and control Technologies, CEECT 2022

作者： Yu, Jiawei Zhu, Yihua Li, Chengxiang Luo, Chao State Key Laboratory of Hvdc Electric Power Research Institute China Southern Power Grid China National Energy Power Grid Technology R&d Center Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China Csg Key Laboratory for Power Sytem Simiulation ELectic Power Reasearch Institute China Southern Power Grid Guangzhou China

ISBN: (纸本)9781665498999

With the development of power electronics technology, the power system is now evolving into a new-generation power system dominated by renewable energy. Due to the physical limitations of power electronics, controller saturation is widely adopted in wind turbines and photovoltaics. In this paper, a nonlinear system model considering output saturation is proposed in the view of general dynamic systems. By defining saturation-activation vector L, all the saturations of the system are uniquely represented. Then, the proposed modeling method is applied to a voltage source converter (VSC) grid-connected system. Based on RTDS simulation, this paper revealed that a class of oscillations at a specific frequency are caused by the activation of the phase-locked loop (PLL) saturation. The frequency of the oscillation depends on the top and bottom boundaries of PLL saturation. © 2022 IEEE.

关键词： Chemical activation

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