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检索条件"机构=Xinjiang Power System Whole Process Simulation Key Laboratory"

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The Fault Diagnosis Method of Photovoltaic DC Transmission Line Based on the Current Polarity Zero-Crossing Characteristics 6

The Fault Diagnosis Method of Photovoltaic DC Transmission L...

引用

6th International Conference on HVDC, HVDC 2024

作者： Ma, Jian Qi, Xiaoxiao Liu, Zhen Wang, Xiaoyun Ma, Xing Zao, Weihong Electric Power Research Institute of State Grid Xinjiang Electric Power Co. Ltd. Xinjiang Key Laboratory of Whole Process Simulation for Power System Urumqi China

ISBN: (纸本)9798350387759

When the large-scale photovoltaic power station adopts the method of DC step-up collection access system, the fault of DC transmission line needs to be identified quickly and accurately. By analyzing the fault characteristics of inter-pole short circuit of photovoltaic DC transmission line, a fault diagnosis method based on current polarity zero-crossing characteristics of fault current polarity is proposed. This method combines the zero-crossing times of fault current and its slope characteristics to construct a diagnosis method. The least square method is used to describe the slope characteristics of the fault current, and the number of zero-crossings is added to construct the criterion, so as to avoid the misjudgment caused by the single instantaneous current change rate and the damage to the DC system caused by the long discrimination time when the inter-pole short-circuit fault occurs. The simulation model of 1 MW / ±30 kV photovoltaic DC step-up access system is built by PSIM simulation software. The simulation results show that the method can quickly and accurately diagnose the fault section. © 2024 IEEE.

关键词： DC transmission DC-DC converter fault diagnosis photovoltaic power generation zero-crossing

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Voltage Stability Analysis of New Energy Mega Bases Based on STATCOM 6

Voltage Stability Analysis of New Energy Mega Bases Based on...

引用

6th International Conference on Electrical Engineering and Control Technologies, CEECT 2024

作者： Zhu, Zimin Zao, Weihong Ma, Xing Liu, Zhen Duan, Yu Wu, Xiaofang Electric Power Research Institute of State Grid Xinjiang Electric Power Co. Ltd. Xinjiang Key Laboratory of Whole Process Simulation for Power System Urumqi China

ISBN: (纸本)9798331528096

Line-commutated converter based high-voltage direct current (LCC-HVDC) system plays an important role for long distance power transmission. However, its vulnerability to commutation failures threatens the stability of power grids. This paper takes the Tianzhong DC area in xinjiang region, China, as a case study to analyze the impacts of the number of operational thermal power plants on the overvoltage situation at wind farm stations. As the number of operational units decreases, the probability of wind turbines disconnecting increases, emphasizing the importance of integrating STATCOM devices near new energy power stations in HVDC transmission sending-end areas. Additionally, the paper analyzes the control structure of STATCOM devices, examines the internal control parameters, identifies key parameters affecting control effectiveness, and provides recommendations for appropriate parameter ranges based on their effects. © 2024 IEEE.

关键词： Thermoelectric power plants

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A primary joint frequency regulation strategy for wind-thermal-storage systems considering frequency regulation deadband 5

A primary joint frequency regulation strategy for wind-therm...

引用

2024 5th International Conference on Electrical Technology and Automatic Control, ICETAC 2024

作者： Zhu, Zimin Duan, Yu Zao, Weihong Liu, Zhen Tang, Junyi Guo, Jiahao Ma, Xing Electric Power Research Institute of State Grid Xinjiang Electric Power Co. Ltd. Urumqi830011 China Xinjiang Key Laboratory of Whole Process Simulation for Power System Urumqi830011 China

For the issue of system frequency stability in low-inertia regions, a primary joint frequency regulation strategy for wind-thermal-storage systems considering frequency regulation deadbands is proposed. First, a system frequency response model incorporating wind-storage frequency regulation deadbands is constructed to analyze the dynamic impact of deadband variations on grid frequency. Next, the timing of frequency regulation actions in the wind-storage system is determined by manually setting the frequency regulation deadband. Finally, the effectiveness of the proposed strategy is validated using a large disturbance excitation method. © Published under licence by IOP Publishing Ltd.

关键词： Frequency stability

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Active and Reactive power Decoupling Control Strategy for LCC-HVDC Based on Finite Operation Range 2

Active and Reactive Power Decoupling Control Strategy for LC...

引用

2nd Asia power and Electrical Technology Conference, APET 2023

作者： Duan, Qingxi Liu, Zhen Duan, Yu Ma, Xing Zhu, Zimin Li, Zhijie Wang, Xiaoyun Xinjiang Key Laboratory of Whole Process Simulation for Power System Xinjiang Electric Power Research Institute State Grid Xinjiang Electric Power Co. Ltd. Urumqi China

ISBN: (纸本)9798350359428

This letter proposes a decoupling control strategy between active power and reactive power in a finite range. Based on the constant current control in the rectifier and constant voltage control in the inverter, the proposed control strategy can adjust the reactive power consumed by the converter under the condition of constant active power at both rectifier and inverter side, and the adjustable range of reactive power is defined. The simulation results verify the effectiveness and correctness of the proposed control strategy. © 2023 IEEE.

关键词： Reactive power

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A Novel DC Control Optimization Strategy for Supporting Transient Voltage of HVDC Sending End system 8

A Novel DC Control Optimization Strategy for Supporting Tran...

引用

8th International Conference on power and Renewable Energy, ICPRE 2023

作者： Duan, Qingxi Qin, Yanhui Liu, Zhen Duan, Yu Zhu, Zimin Wang, Xiaoyun Ma, Xing Zao, Weihong State Grid Xinjiang Electric Power Co. Ltd. Xinjiang Key Laboratory of Whole Process Simulation for Power System Xinjiang Electric Power Research Institute Urumqi China

ISBN: (纸本)9798350328813

In view of the transient voltage problem caused by the fault occurred in the sending end AC system. This paper analyzes the interaction of reactive power between AC and DC systems, and the dominant factors affecting transient voltage was identified. Considering the fault severity, the expression of transient voltage of converter bus is established in this paper. Based on this, the expression of DC current command value is derived, and the DC control optimization strategy is proposed to support the transient voltage. Finally, a test model is built based on the CIGRE HVDC benchmark model in the PSCAD/EMTDC, and the validity of the proposed strategy is verified by simulation results. © 2023 IEEE.

关键词： DC control HVDC support strategy transient voltage

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Study on the Uneven Distribution of Breaker Circuit Current in UHVDC Sending-end Converter Station AC Field 6

Study on the Uneven Distribution of Breaker Circuit Current ...

引用

6th International Conference on HVDC, HVDC 2024

作者： Duan, Qingxi Liu, Zhen Zhang, Lu Nan, Dongliang Duan, Yu Fan, Guoqi Xinjiang Key Laboratory of Whole Process Simulation for Power System Electric Power Research Institute of State Grid Xinjiang Electric Power Co. Ltd. Urumqi China State Grid Jinhua Power Supply Company Jinhua China

ISBN: (纸本)9798350387759

In recent years, China's UHVDC construction, operation and maintenance technology have gradually matured. In the process of DC capacity and actual conveying power are constantly refreshing the world records, the unknown risk of DC high-power operation has also been exposed one after another. Among them, for the first time, the contradiction between precise work current demand of the switch CT and the uneven current distribution in converter station AC field caused the partial breaker circuit current exceeds the upper limit appeared. In view of the above problems, starting from main wiring connection and line power, bus resistance distribution and the interval circuit resistance, this paper study the independent and coupling situation on the uneven distribution of breaker circuit current in UHVDC sending-end converter station AC field. Based on the analysis conclusion, the Changji converter station case was analyzed, and the prevention measures and operation suggestions were put forward. © 2024 IEEE.

关键词： AC field Changji converter station circuit current converter station switch circuit UHVDC

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Research on Comprehensive Assessment Method of Battery Consistency Based on Scaled Energy Storage power Station 9

Research on Comprehensive Assessment Method of Battery Consi...

引用

9th Asia Conference on power and Electrical Engineering, ACPEE 2024

作者： Kepaiyitulla, Tursun Li, Ming Zheng, Yunping Zong, Sijia Luo, Xingyan Wang, Shangxing Li, Xiangjun Xinjiang Key Laboratory of Whole Process Simulation for Power System State Grid Xinjiang Electric Power Research Institute Urumqi China State Key Laboratory of Operation Ad Control of Renewable Energy and Storage Systems China Electric Power Research Istitute Beijing100192 China

ISBN: (纸本)9798350309638

In the long-term operation of a megawatt-scale energy storage plant composed of series-parallel connections, the single batteries will have different degrees of inconsistency problems. To solve this problem, this paper proposes a comprehensive assessment method based on the consistency of batteries in scaled energy storage power stations. According to the consistency indexes such as single battery voltage and voltage polarity difference in series connection between modules, the consistency evaluation criterion of battery monomer was established. Based on the historical data of a battery energy storage system, the consistency evaluation criterion of a single battery is used to analyze the consistency of a single battery of an energy storage power station at different charging and discharging stages. The results show that this method can accurately assess cell consistency. It provides data support for the health status assessment of energy storage plants and reduces the systematic operational risk of energy storage plants. © 2024 IEEE.

关键词： Digital storage

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Two-stage Robust Configuration and Optimal Operation Strategy of HES system on Generation Side 3

Two-stage Robust Configuration and Optimal Operation Strateg...

引用

3rd International Conference on Energy Engineering and power systems, EEPS 2023

作者： Zhai, Baoyu Chen, Guanchu Zhang, Long Liang, Shuchao Xu, Zhi State Grid Xinjiang Electric Power Co. Ltd Electric Power Science Research Institute Urumqi830001 China Xinjiang Power System Whole Process Simulation Key Laboratory Urumqi830001 China

ISBN: (纸本)9798350313857

This paper introduces a two-stage approach to improve the cost-effectiveness and operational flexibility of renewable energy-based power system with energy storage. The focus is on power generation-side hybrid energy storage. In the first stage, historical data of renewable energy generation is used to establish an uncertainty ensemble, capturing the range of power output variations. This information is then utilized to create a robust configuration model for each type of energy storage unit in the hybrid system. In the second stage, the optimal configuration scheme obtained in the first stage is refined by imposing intra-day scale constraints. This results in the determination of the robust configuration for each energy storage unit, considering investment costs and addressing supply and grid connection requirements. Furthermore, an optimal operation model is developed to minimize net load volatility while ensuring energy supply and grid connection requirements are met. This approach significantly improves the system's grid-friendliness. To demonstrate the effectiveness of the proposed configuration model and operation strategy, an example using data from xinjiang Province wind farm, its equipped energy storage, and load is presented. This example serves as evidence of the competitiveness and practicality of the approach presented in this paper. © 2023 IEEE.

关键词： Empirical mode decomposition

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An optimal configuration method of new generation and high-capacity synchronous condenser for enhancing the power grid voltage support 8

An optimal configuration method of new generation and high-c...

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8th International Symposium on Advances in Electrical, Electronics, and Computer Engineering, ISAEECE 2023

作者： Xiaoxiao, Qi Yongjun, Yu Xiaoyun, Wang Yue, Ma Jing, Cheng Xinjiang Key Laboratory of Whole Process Simulation for Power System Urumqi Xinjiang830011 China State Grid Xinjiang Electric Power Co. Ltd. Urumqi Xinjiang830011 China School of Electrical Engineering Xinjiang University Urumqi Xinjiang830017 China

ISBN: (纸本)9781510666290

Aiming at the weak voltage support of the long-chain power grid, an optimal configuration method of condensers considering system stability constraints is proposed. To add condensers to key buses to improve the voltage support strength of the power grid. The basic data of Southern xinjiang power Grid in winter operation mode was collected, and statistical prediction and analysis of load and power surplus were made. After preliminarily selecting the location for the 750kV backbone grid, the location of the condenser was determined. Further, the weak area of 220kV bus voltage stability to achieve the accurate location of the condenser was determined. With the stability of the power grid as the constraint and economic optimization as the goal, the condenser capacity configuration is realized. The power grid model is built on the PSASP software platform, and the power flow calculation and voltage stability analysis are carried out. The results show that the proposed method can effectively improve the voltage support strength of the power grid, and promote the increase of new energy access ratio and consumption level. © 2023 SPIE. All rights reserved.

关键词： system stability

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Research on PV power fluctuation smoothing control strategy based on ESS 3

Research on PV power fluctuation smoothing control strategy ...

引用

3rd International Conference on Laser, Optics, and Optoelectronic Technology, LOPET 2023

作者： Sun, Bing Wang, Lichao Ma, Jian Wei, Xingyuan Electric Power Research Institute of State Grid Xinjiang Electric Power Co. Ltd Xinjiang Key Laboratory of Whole Process Simulation for Power System Urumqi830011 China Shandong University School of Electrical Engineering Jinan250012 China

ISBN: (纸本)9781510667624

Energy storage systems can effectively improve the inertia of PV systems and achieve power smoothing of PV power generation due to their fast and flexible power regulation capability. This study proposes a BESS charging and discharging control method with limited PV fluctuation smoothing for the capacity optimization of energy storage in high permeability PV grids. This method can reduce the number of times the BESS is charged and discharged and improve its service life while smoothing out large fluctuations in PV power output. © 2023 SPIE.

关键词： Energy storage

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