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5th IEEE International Electrical and Energy Conference, CIEEC 2022

作者： Huang, Zhida Wu, Wencong Cai, Haiqing Zhu, Yihua Huang, Libin Chang, Dongxu State Key Laboratory of Hvdc Electric Power Research Institute Csg National Energy Power Grid Technology R&d Centre Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Csg Key Laboratory for Power System Simulation Guangzhou China

ISBN: (数字)9781665411042

ISBN: (纸本)9781665411042

Currently, the power grid is carrying out the standardized design and application of 220kV spare power automatic switching equipment. It is more difficult to carry out the on-site standby automatic switching function test in the actual power grid. The power supply department urgently needs a simulation environment that can truly simulate the actual power grid to support the development of this functional test. Real-time simulation has the ability to carry out on-site automatic transfer function tests in terms of technical feasibility. To verify its effectiveness, this paper built a standardized closed-loop test system for 220kV spare power automatic switching equipment based on real-time simulation. A number of tests have been carried out for the automatic switch-on function of on-site equipment, and the device action events on the actual site have been inverted. The test results show that the established RTDS real-time simulation model has the ability to simulate the actual 220kV power grid. It has been verified that the action logic of the standby automatic input device in various modes meets the requirements of the standard specification, which strongly supports the standardized application of the 220kV spare power automatic switching equipment function of the power grid. © 2022 IEEE.

关键词： Switching

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Mechanism and Influencing Factor Analysis of High Frequency Oscillation in PMSG-Based Wind Farm With grid-Connected System 6

Mechanism and Influencing Factor Analysis of High Frequency ...

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6th IEEE International Conference on Energy Internet, ICEI 2022

作者： Luo, Chao Zhu, Yihua Huang, Libin Yu, Jiawei Electric Power Research Institute China Southern Power Grid State Key Laboratory of Hvdc Guangzhou China National Energy Power Grid Technology R&d Centre Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China

ISBN: (纸本)9781665493277

Under the background of vigorously developing wind power, permanent magnet synchronous generator (PMSG)-based wind turbines have been widely used in offshore wind farms. However, the high frequency oscillations (HFOs) of PMSG-based wind farms with grid-connected system have occurred frequently in recent years, which have a bad impact on the safe and stable operation of the power system. And current researches only preliminarily reveal the mechanism, which are lacking in discussion on the key factors involved in HFOs. This paper establishes the high frequency impedance model of PMSG-based wind farm with grid-connected system. To identify the key factors involved in HFO, the impedance sensitivity method is used to obtain the quantitative relationship of the influence of each parameter on HFO. It can be concluded that the control delay, LCL filter parameters, collector lines parameters have the greatest influence on the HFO of the wind farm, but the characteristic of negative resistance caused by control delay is the root cause of HFO. Finally, this paper establishes the model of PMSG-based wind farm with grid-connected system on the PSCAD/EMTDC and verifies the correctness of the theoretical analysis. The conclusions of this paper can provide a reference basis for the mitigation strategies of HFOs. © 2022 IEEE.

关键词： Permanent magnets

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Relay protection Setting Management System and Method Based on Blockchain Encryption Technology

Relay Protection Setting Management System and Method Based ...

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2023 International Conference on power System Technology, powerCon 2023

作者： Chai, Qingfa Tang, Yi Wang, Quan Jiang, Jiayin Wang, Anning Li, Yudun Li, Congcong Key Laboratory of Power System Intelligent Dispatch and Control Jinan China State Grid Shandong Electric Power Company Jinan China

ISBN: (纸本)9798350300222

Aiming at the problems such as low efficiency of relay protection setting management and remote setting, risk of error in setting delivery and setting, and difficulty of quick warning of setting value mutation, this paper proposes a method of relay protection setting management and remote setting based on hash value check. A remote setting system of setting value is established, which is composed of block chain server, substation centralized control master station, control cloud platform and protection device. The setting value is set and transferred remotely in the form of file. The block hash encryption of the setting value file is carried out, and the block chain provides reliable data storage and transmission services, so that the setting value file cannot be tampered with in the flow of all parts. Ensure the high reliability of relay protection remote setting. The engineering test results show that the proposed method is reliable and effective, and can provide technical support for the reliable automatic setting of setting values. © 2023 IEEE.

关键词： Blockchain

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Study on low-carbon electricity consumption strategy for photovoltaic power generation wastewater plant based on convolutional neural network

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Renewable Energy 2025年

作者： Qing Shao Yiyi Yi Chaojing Li Junjun Liu Yuxiang Xie Qingwu Gong Zizheng Liu Yiqun Chen School of Civil Engineering Wuhan University Wuhan 430072 China State Key Laboratory of Power Grid Environmental Protection Hubei Engineering and Technology Research Center for AC/DC Intelligent Distribution Network School of Electrical Engineering and Automation Wuhan University Wuhan 430072 China

Wastewater treatment plants (WWTPs) are significant electricity consumers, leading to substantial energy use and carbon emissions. In response to China's "dual carbon" goal, photovoltaic power generation systems are increasingly adopted in WWTPs for their economic and environmental advantages. However, photovoltaic power is highly weather-dependent and unstable. This paper proposes a low-carbon electricity consumption strategy for WWTPs with photovoltaic systems by optimizing blower power scheduling to maximize photovoltaic use and reduce electricity costs while ensuring effluent quality. An anaerobic-anoxic-oxic (AAO) WWTP in Wuhan City served as a case study. A water quality simulation model was established using GPS-X, and the photovoltaic system was designed and assessed using PVsyst. Then, the models for water quality, photovoltaic power generation, and electricity pricing were integrated to adjust blower power consumption, forming a set of low-carbon strategy. The strategy sample set was input into the convolutional neural network (CNN) model, which accurately predicted dispatch strategies, achieving a recall and accuracy rates above 85%. Analysis of the September 2019 operation data indicates that this strategy can yield an additional 10.1% savings on the WWTP's electricity bill. This approach provides a reference for low-carbon power management in other wastewater plants with photovoltaic systems and promotes effective system integration.

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Reliability Assessment of Battery Energy-Storage Module Based on Correlation Analysis 7

Reliability Assessment of Battery Energy-Storage Module Base...

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7th Asia Conference on power and Electrical Engineering, ACPEE 2022

作者： Xiong, Jiali Cai, Qiang Dai, Liyu Li, Zhicheng Lin, Guodong Deng, Chaoping Sun, Jin Electric Power Research Institute State Grid Fujian Electric Power Co. Ltd Fujian Key Laboratory of Protection and Operation Control for Smart Grid Fuzhou China Fuzhou University College of Electrical Engineering and Automation Fuzhou China

ISBN: (纸本)9781665418195

The battery energy storage technology can be flexibly configured and has excellent comprehensive characteristics. In addition to considering the reliability of the battery energy storage power station when it is connected to the grid, the reliability of the energy storage power station itself should also be considered. The reliability model based on Copula theory was established for battery module, and the reliability of energy storage module was analyzed according to the basic structure of energy storage modules. In this paper, the example analysis is based on the existing simulation model of energy storage module. Then the reliability of energy storage module in the next 20 years is predicted considering the different correlations between battery clusters. © 2022 IEEE.

关键词： Reliability analysis

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Electromagnetic Transient Modeling and Real-time Simulation Based on state-space Equations 4

Electromagnetic Transient Modeling and Real-time Simulation ...

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4th International Conference on New Energy and power Engineering, ICNEPE 2024

作者： Guo, Tianyu Hu, Binjiang Luo, Hui Tu, Liang Zhao, Yanjun Hu, YuFeng China Southern Power Grid State Key Laboratory of Hvdc Electric Power Research Institute Guangdong China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangdong China China Southern Power Grid Csg Key Laboratory for Power System Simulation Electric Power Research Institute Guangdong China China Southern Power Grid Co. Ltd China

ISBN: (纸本)9798331516086

Due to the different output characteristics of different components of the power system, the simulation results of its output deviate from the actual situation. Therefore, the electromagnetic transient modeling and real-time simulation based on the state space equation are proposed. From the perspective of rectifier, DC transmission line, inverter and control system, the composition of the state space model of the complete power system and the output characteristics of each part in the operation process are analyzed. In the test results, the design method can achieve a stable fit between the real-time simulation results of voltage waveform containing two VSC modules and the actual situation. © 2024 IEEE.

关键词： Electromagnetic transients

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An Application of Auxiliary operation of power Dispatching based on Semantic Analysis 12

An Application of Auxiliary Operation of Power Dispatching b...

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12th IEEE PES Asia-Pacific power and Energy Engineering Conference, APPEEC 2020

作者： Zhang, Tao Li, Hao Lu, Jixiang Jun, Lu Jin Li, Hong Xie, Feng Technology Research Center Nari Group Corporation Nanjing China State Key Lab. of Intelligent Power Grid Protection and Operation Control Nari Group Corporation Technology Research Center Nanjing China

ISBN: (数字)9781728157481

ISBN: (纸本)9781728157481

power dispatching plays quite an important role in power grid operation in terms of safety and stability. Structured data has been well managed in the real-time power dispatching and controlling system. However, the management of unstructured data such as text data has not received enough attention. In this paper, we accomplish an application of auxiliary operation of power dispatching by doing semantic analysis on operation procedures, which belong to an important category of power dispatching text data for fault disposal. The method that we proposed in our application is achieved based on Natural Language Processing (NLP) technologies. Our contributions are mainly two-fold: 1) we accurately extract key information from text data through our proposed method, and 2) we help power dispatching operators reduce their work and improve efficiency by providing auxiliary operation advice. © 2020 IEEE.

关键词： Semantics

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Research and Application of Trans-Regional Cooperative Disposal of UHV Interconnected power grid 3

Research and Application of Trans-Regional Cooperative Dispo...

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2017 3rd IEEE International Conference on control Science and Systems Engineering (ICCSSE)

作者： Shan Xin Jiang Yefeng Wu Li Jin Yiding Wang Yiyu Lu Jinjun NARI Group Corporation NARI Technology Co.Ltd State Key Laboratory of Smart Gird Protection and Control Jiangsu Electric Power Company of State Grid of China National Electric Power Dispatching and Control Center State Grid Corporation of China

ISBN: (纸本)9781538604854

With the rapid construction of UHV AC/DC power grid, the integration characteristics of power grid are becoming more and more prominent, and real-time operation control of dispatching is significantly becoming more and more difficult. The existing monitoring and control model based on the system model data cannot meet the requirements for the development of UHV power grid. Based on the existing achievements of dispatching automation system, the general goal and framework of the trans-regional cooperative disposal of UHV interconnected power grid are put forward, and the key technologies are analyzed in four aspects: situation awareness, fault location, joint disposal and cooperative control to provide reference and example for follow-up construction for real-time control and support system for the dispatching of UHV power grid.

关键词： UHV situation awareness cooperative disposal source grid load wide area graphic browsing DC fault diagnosis

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Analysis of the power Converter Used in Wind power Generator System 5th

Analysis of the Power Converter Used in Wind Power Generator...

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5th International Conference on intelligent Computing, Communication and Devices, ICCD 2019

作者： Zhang, Jinping Han, Xushan Zhao, Long Wang, Dingmei Li, Jin Ma, Chengzhi State Grid Gansu Electric Power Research Institute Lanzhou730070 China Key Laboratory of Wind Power Integration Operation and Control Lanzhou730070 China

ISBN: (纸本)9789811558863

With the constant improvement of the grid-connected wind farm and the increasing capacity of the wind power system, there is a higher requirement for the converter technology of wind farm. This paper first elaborates several converter topological structures used in the variable wind power generator system, then introduces the converters and the control strategy applying in medium and low-voltage wind power system at present. At last from the aspects of improving the topological structures with advantages, control strategy, and meeting the application requirements of wind power system, discussing the development trend of the wind power converter. © 2021, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Topology

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A fast boundary protection for an AC transmission line connected to an LCCHVDC inverter station

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protection and control of Modern power Systems 2020年第1期5卷 328-339页

作者： Zhen Liu Houlei Gao Sibei Luo Le Zhao Yuyao Feng Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong UniversityNo.17923Jingshi RoadJinan 250061China Electric Power Research Institute of State Grid Shanghai Electric Power Company No.171Handan RoadShanghaiChina

For AC transmission lines connected to an LCC-HVDC inverter station,commutation failure can lead to the wrong operation of traditional *** solve the problem,this paper proposes a fast protection scheme using transient information from one end of the AC *** boundary frequency characteristics of the AC line connected to LCC-HVDC inverter are analyzed *** reveals the existence of significant attenuation on both high frequency signals and some specific frequency *** on the boundary characteristics,a novel boundary protection principle utilizing a backward traveling wave is then proposed.A PSCAD/EMTDC simulation model of a±800 kV LCC-HVDC and 500 kV AC transmission system is established,and different fault cases are *** simulation results prove that the novel protection principle is immune to commutation failure,fault resistance and fault type.

关键词： LCC-HVDC Commutation failure Transient protection AC transmission line Inverter station Boundary characteristics

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