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2023 5th International Conference on Energy systems and electrical power, ICESEP 2023

作者： Yang, Zaixin Minfu, A. Yin, Baiqing Inner Mongolia Enterprise Key Laboratory of Smart Grid Simulation of Electrical Power System Inner Mongolia Power Research Institute Hohhot010020 China

The energy storage station is playing an increasingly important role in supporting new power systems. How to scientifically and effectively evaluate the application effect of energy storage stations is an urgent problem to be solved. In this study, a multi-indicator evaluation model for energy storage stations is established. An improved fuzzy comprehensive assessment (FCA) with optimal weight is applied to actual energy storage stations. Using the energy storage station monitoring platform, comprehensive evaluation scores of demonstrated energy storage stations are obtained. The support effect of energy storage stations on the power grid is evaluated from three aspects: performance, operational reliability, and energy efficiency. The higher the evaluation score, the stronger the energy storage regulation ability, and the more significant the active support to the power grid. © 2023 Institute of Physics Publishing. All rights reserved.

关键词： Energy storage

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Control, Modeling and Stability Analysis of DRU-based grid-forming Converter

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Chinese Journal of electrical Engineering 2025年第1期11卷 83-92页

作者： Wencong Wu Minzhi Wang Liang Tu Haiqing Cai Guanglei Yan Xiaohui Qu Haohan Gu Wei Chen State Key Laboratory of HVDC China Southern Power GridGuangzhou 510663China National Energy Power Grid Technology R&D Center Guangzhou 510663China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power Systems China Southern Power GridGuangzhou 510663China CSG Key Laboratory for Power System Simulation China Southern Power GridGuangzhou 510663China School of Electrical Engineering Southeast UniversityNanjing 210096China

Diode rectifier unit(DRU)-based high-voltage direct current(HVDC)transmissionsystems areeffectivein achieving the stableandeconomical operation of offshore *** theuncontrollable characteristicsof DRUs,a grid-forming(GFM)strategy forwind-turbine converters isnecessary to support offshore AC voltageand ***,the active power-synchronization control in traditional GFM converters is unsuitable for DRU-based GFM ***,the stability issue for DRU-based HVDC systems involving DRU-based GFM and grid-following(GFL)converters has not yet been *** solve these issues,this study begins with the characteristics of a DRU-based HVDC system and presents a control scheme for DRU-based GFM converters for power ***,the dq-frame impedance model of the DRU-based GFM converteris proposed for the stability analysis of the entire HVDC ***,a simulation platform is built to verify the model accuracy and system stability.

关键词： Diode rectifier unit offshore wind-powergeneration grid-forming converter impedance model stabilityanalysis

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Study on the transient overvoltage suppression effect of the synchronous condenser of high percentage renewable energy in the sending-end system 3

Study on the transient overvoltage suppression effect of the...

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2024 3rd International Conference on power system and Energy Technology, ICPSET 2024

作者： Guo, Qi Li, Dandan Zhao, Yue Co. Ltd. Inner Mongolia Power Research Institute Branch Hohhot010020 China Inner Mongolia Enterprise Key Laboratory Smart Grid Simulation of Electrical Power System Hohhot010020 China

This paper analyzes the impact of configuring a synchronous condenser on the characteristics of the Inner Mongolia power grid following the commissioning of the first grid-to-grid DC project. simulation results show that, after the configuration of synchronous condenser, the multiple renewable energy stations short circuit ratio (MRSCR) rises, and the DC sending end of the grid is a strong system, which is conducive to the whole scale of renewable energy transmission of Inner Mongolia power grid. DC bipolar blocking faults and transient overvoltage problems at the sending end occur for different operating conditions, such as reduced power and bipolar operation. Then, the effect of different numbers of synchronous condensers on transient overvoltages is studied. The study shows that it is necessary to reasonably arrange the DC project supporting thermal power unit start-up mode and configure large-capacity synchronous condenser or a certain number of distributed regulators, which can help to alleviate the problem of transient overvoltage during faults. © 2024 Institute of Physics Publishing. All rights reserved.

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simulation for a panoramic mirror system of security and stability control 3

Simulation for a panoramic mirror system of security and sta...

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3rd International Conference on Consumer Electronics and Computer Engineering, ICCECE 2023

作者： Yang, Zaixin Minfu, A. Xing, Huadong Inner Mongolia Power Research Institute Inner Mongolia Enterprise Key Laboratory of Smart Grid Simulation of Electrical Power System Hohhot China Inner Mongolia Power Research Institute Hohhot China

ISBN: (纸本)9798350331578

With the centralized access of large-scale new energy to the power grid, the risk for the second line of defense of the new power system is prominent. The accuracy and timeliness of security and stability control strategies are challenged. In this study, an architecture of security and stability control panoramic mirror system is proposed. A new control strategy and calculation method are used to analyze the security and stability characteristics for new energy power grid. Furthermore, a real-Time closed-loop dynamic test based on Real Time Digital simulation system (RTDS) for the panoramic mirror system is completed. The results show that the real-Time simulation matching strategies are effective and correct. © 2023 IEEE.

关键词： Mirrors

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Optimization scheduling method for multiple flexibility resources considering electric vehicle cluster 5

Optimization scheduling method for multiple flexibility reso...

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2023 5th International Conference on Energy, power and grid, ICEPG 2023

作者： Zhang, Xuan Zhao, Qianyu Wang, Shouxiang Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin300072 China Key Laboratory of Power System Simulation and Control Tianjin300072 China

To unleash the scheduling potential of flexible resources, an enhanced flexibility approach is proposed, which takes into account various flexible resources including electric vehicle (EV) clusters. Initially, the dispatch potential of individual EV users is predicted based on historical data regarding travel habits and charging station parameters. Subsequently, the power and energy-feasible regions are constructed to quantify the flexibility of the EV clusters. To enhance the overall system's operational efficiency and flexibility, various constraints related to flexibility resources are taken into consideration, including the source-grid-load-storage aspects. As a result, a multidimensional flexibility resource supply-demand model is established and the analysis target cascading method is applied to solve this sophisticated model. Finally, the modified system is used to test and analyze the proposed model and method. The results demonstrate the proposed model and method can enhance the operational flexibility of high-proportion new energy distribution networks. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Electric vehicles

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Analysis of Operational Characteristics and Equivalent Test Method for IGBTs in MMC

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CSEE Journal of power and Energy systems 2023年第4期9卷 1567-1576页

作者： Yixuan Yang Guangfu Tang Shan Liu Gaoyong Wang Zhiyuan He State Key Laboratory of Aiternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China State Grid Smart Grid Research Institute Co. Ltd.Beijing 102209China.

A design methodology and a feasible equivalent circuit are proposed to test the reliability of insulated gate bipolar transistors(IGBT)in actual modular multilevel converter(MMC)conditions,which is impossible for existing IGBT test platforms due to unexplicit equivalent indexes and low reliability of test *** of IGBT devices are extracted during MMC operation,and turn-off transient and effective current are highlighted as key indexes for the equivalent test.A feasible equivalent timing diagram and a corresponding test circuit are proposed,as well as the circuit's operation *** proposed equivalent test method is verified by a back-to-back experiment with twenty-four submodules,and results indicate the proposed method has good *** the proposed circuit waveform and the back-to-back experiment waveform,all indexes have errors of less than 5.9%.Furthermore,the proposed circuit components have losses less than 0.7 times those of the device under test,making them reliable and suitable for long-term operation tests for IGBT devices in *** Terms-Equivalent test,IGBT,MMC,reliability.

关键词： Equivalent test IGBT MMC reliability

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Optimal Scheduling for Multi-energy system Considering Coupling of Molten Medium Hydrogen Production and Pipeline Energy Storage 3

Optimal Scheduling for Multi-energy System Considering Coupl...

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3rd New Energy and Energy Storage system Control Summit Forum, NEESSC 2023

作者： Wang, Xuan Zhao, Qianyu Wang, Shouxiang Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin Key Laboratory of Power System Simulation and Control Tianjin China

ISBN: (纸本)9798350309348

Existing hydrogen production technologies always have weakness of large carbon emission, and there are still many research gaps in coupling with multi-energy flow. To this end, this paper proposes an optimal scheduling model for multi-energy system (MES) considering coupling of molten medium hydrogen production (mmH2P) and pipeline energy storage (PES). The mmH2P is introduced into MES to achieve the in-situ green conversion of gas and the zero-carbon-emission hydrogen production while obtaining solid carbon. Further, a Refined PtGmmH2P mode is proposed combining mmH2P, power-to-gas and hydrogen storage. Besides, the PES due to different transmission inertia of energy flows is considered, and its coupling coordination promotion with Refined PtG-mmH2P is further analyzed. Case study proves that the proposed scheduling model of MES can achieve the win-win of economy, low carbon and high renewable energy consumption rate. ©2023 IEEE.

关键词： Pipelines

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Optimal Scheduling for Agricultural Multi-Energy Park with Combined Wind-Solar-Biomass Energy Supply

Optimal Scheduling for Agricultural Multi-Energy Park with C...

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2023 International Conference on power system Technology, powerCon 2023

作者： Wang, Xuan Zhao, Qianyu Wang, Shouxiang Tianjin University Key Laboratory of Smart Grid of Ministry of Education Tianjin Key Laboratory of Power System Simulation and Control Tianjin China

ISBN: (纸本)9798350300222

Agricultural multi-energy park (AMEP) is an essential pathway for upgrading and transforming traditional agriculture, and the utilization of renewable energy can contribute to its sustainable development. In this context, this paper proposes an optimal scheduling method for AMEP with combined wind-solar-biomass energy supply. The biomass energy contained in waste from the user side can be reused and combined with wind and solar energy to achieve a diversified supply of renewable energy. Besides, a biogas heat-electricity cogeneration with adjustable thermoelectric ratio is introduced, enhancing the flexibility of electricity and heating supply for AMEP. In addition, an adder carbon tax mechanism is considered to incentivize energy conservation and emissions reduction of AMEP. simulation results demonstrate that the proposed optimal scheduling model can more effectively utilize renewable energy, leading to significant advantages in enhancing the flexibility, economy, and low carbon of AMEP. © 2023 IEEE.

关键词： Biomass

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Substation Safety Operation Monitoring system Based on Internet of Things Technology

Substation Safety Operation Monitoring System Based on Inter...

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2023 Asia-Europe Conference on Electronics, Data Processing and Informatics, ACEDPI 2023

作者： Yu, Chaoyu Han, Junfei Zhang, Yifan Hu, Hongbin Wang, Yuqiang Zhang, Baoquan Yuan, Ningping Inner Mongolia Enterprise Key Laboratory of Smart Grid Simulation of Electrical Power System Inner Mongolia Power Research Institute Hohhot China Inner Mongolia Medical University School of Computer Information Hohhot China

ISBN: (纸本)9798350301151

The existing wireless technologies for substation operation safety monitoring include WiFi, RFID, ZigBee, CSS and other wireless positioning technologies, but due to poor positioning accuracy, it is difficult to meet the needs of applications. IoT technology has a variety of information sensors, powerful information collection and communication functions, and can provide advantages such as precise positioning. For a high-risk industry such as substations, it is also essential to monitor the safe operation of substations. Therefore, IoT technology is safe in substations. The application of operation monitoring has also become a research hotspot. In this paper, three positioning algorithms such as TOA, TDOA and AOA are proposed, and the positioning accuracy of TDOA is determined by the positioning accuracy measurement experiment. Therefore, TDOA can be selected for the positioning of the operator's position by the monitoring system. The information transmission function transmits the location information of the operator to the monitoring background. When the operator exceeds the safe area, the system will alarm and remind to ensure the safety of the personnel. © 2023 IEEE.

关键词： Time difference of arrival

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Distributionally Robust Scheduling for Benefit Allocation in Regional Integrated Energy system with Multiple Stakeholders

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Journal of Modern power systems and Clean Energy 2024年第5期12卷 1631-1642页

作者： Qinglin Meng Xiaolong Jin Fengzhang Luo Zhongguan Wang Sheharyar Hussain the Comprehensive Service Center State Grid Tianjin Electric Power CompanyTianjin 300010China the Key Laboratory of Smart Grid of Ministry of Education School of Electrical and Information EngineeringTianjin UniversityTianjin 300072China the School of Electrical Engineering Tiangong UniversityTianjin 300387China the Key Laboratory of Smart Energy&Information Technology of Tianjin Municipality Tianjin 300072China the Institute of Marine Electronic and Intelligent System Ocean CollegeZhejiang UniversityZhoushanChina

A distributionally robust scheduling strategy is proposed to address the complex benefit allocation problem in regional integrated energy systems(RIESs)with multiple stakeholders.A two-level Stackelberg game model is established,with the RIES operator as the leader and the users as the *** considers the interests of the RIES operator and demand response users in energy *** leader optimizes time-of-use(TOU)energy prices to minimize costs while users formulate response plans based on prices.A two-stage distributionally robust game model with comprehensive norm constraints,which encompasses the two-level Stackelberg game model in the day-ahead scheduling stage,is constructed to manage wind power ***-Kuhn-Tucker(KKT)conditions transform the two-level Stackelberg game model into a single-level robust optimization model,which is then solved using column and constraint generation(C&CG).Numerical results demonstrate the effectiveness of the proposed strategy in balancing stakeholders'interests and mitigating wind power risks.

关键词： Regional integrated energy system(RIES) distributionally robust scheduling Stackelberg game uncertainty demand response

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