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检索条件"机构=State Grid Key Laboratory Beijing Smart-Chip Microelectronics Technology"

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Research on micro power wireless communication system based on OFDM technology 3

Research on micro power wireless communication system based ...

引用

3rd International Conference on Computer Science and Communication technology, ICCSCT 2022

作者： Long, Yan Chen, Yongli Bai, Zhihua Zhao, Xiaoqing Dong, Ziqi State Grid Key Laboratory of Power Industrial Chip Design and Analysis Technology Beijing Smart-Chip Microelectronics Technology Co. Ltd. Beijing100192 China Beijing Engineering Research Center of High-Reliability IC with Power Industrial Grade Beijing Smart-Chip Microelectronics Technology Co. Ltd. Beijing100192 China State Grid Information & Telecommunication Branch Beijing100192 China

ISBN: (纸本)9781510661240

The mainstream modulation technology of micro power wireless communication chip is (G) FSK ((Gauss) Frequency Shift keying), but this technology has the defects of wide bandwidth occupation, low bandwidth utilization and low sensitivity. To solve this problem, improve the performance and frequency band utilization of micro power wireless communication system, and realize the high reliability and real-time of communication, a micro power wireless communication system based on OFDM (Orthogonal Frequency Division Multiplexing) technology was proposed in this paper, which can effectively improve the reliability, real-time and receiving sensitivity of meter reading. The test results show that this method meets the functional and performance requirements of state grid interconnection. © 2022 SPIE.

关键词： Orthogonal frequency division multiplexing

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A Novel Operating Condition Simulation Test Circuit Topology for Saturable Reactors in UHVDC Converter Valves 4

A Novel Operating Condition Simulation Test Circuit Topology...

引用

4th International Conference on smart grid and Energy Engineering, SGEE 2023

作者： Gao, Chong Li, Tingting Yang, Jun Wei, Xiaoguang Wang, Chenghao Zhang, Xiaolong State Grid Smart Grid Research Institute Co. Ltd. State Key Laboratory of Advanced Power Transmission Technology Beijing China Beijing Institute of Smart Energy Beijing China

ISBN: (纸本)9798350359619

Existing converter valve testing methods cannot fully simulate the impact of the turn-on and turn-off of single valves of other bridge arms belonging to the same six-pulse converter. The voltages caused by the turn-on and turn-off processes of the converter valve are different, and existing testing methods cannot provide such voltage waveforms. To solve these two problems, this paper proposes a saturable reactor test circuit topology and a control sequence. A saturable reactor operating condition simulation test platform is established. The simulation and experimental results indicate the effectiveness of the proposed test circuit topology and testing method. © 2023 IEEE.

关键词： Topology

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Topology and Control Strategy of DC Sending System of Diode Converter with Flywheel Energy Storage for Western Wind Power Generation 6

Topology and Control Strategy of DC Sending System of Diode ...

引用

6th International Conference on Power and Energy technology, ICPET 2024

作者： Yan, Jun Wang, Siyao Wang, Sen Li, Tianxin Pan, Peiyuan State Key Laboratory of Advanced Power Transmission Technology State Grid Smart Grid Research Institute Co. Ltd Beijing China North China Electric Power University Beijing China

ISBN: (纸本)9798350375855

With the strategy of sending electricity from west to east, wind power in the west has ushered in large-scale development. In order to realize long-distance transmission, flexible DC transmission technology is developing rapidly, and the use of diode converter instead of MMC converter can significantly reduce the construction cost. However, the diode converter requires the wind farm AC side to have passive operation capability, this paper adopts flywheel energy storage to provide power support for the diode converter to meet the black start requirements. This paper introduces the topology and operation mode of the diode converter DC sending system with flywheel energy storage, introduces the active and reactive power calculation formula and the three-phase voltage inverter simulation model in the SVPWM control mode in the system operation, and specifically demonstrates the modeling interface of wind speed model, wind power generation system model, charging model of flywheel energy storage system, and discharging model of flywheel energy storage system in the simulation system modeling, and in the last part of the simulation operation section builds a diode converter with flywheel energy storage to provide power support for the wind farm AC side to meet the black start requirements. The simulation operation part builds the wind power generation system with flywheel energy storage, and inputs the simulated wind speed to control the stabilization of grid-connected voltage to verify the feasibility of the proposed DC sending system topology and control principle through simulation analysis. © 2024 IEEE.

关键词： Flywheels

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Variance analysis based distinguisher for template attack 18

Variance analysis based distinguisher for template attack

引用

18th International Conference on Computational Intelligence and Security, CIS 2022

作者： Cheng, Song Zhang, Hailong Hu, Xiaobo Gao, Shunxian Liu, Huizhi Beijing Smart-Chip Microelectronics Technology Co. Ltd. State Grid Key Laboratory of Power Industrial Chip Design and Analysis Technology Beijing China Beijing Smart-Chip Microelectronics Technology Co. Ltd. Beijing Engineering Research Center of High-Reliability IC with Power Industrial Grade Beijing China Institute of Information Engineering State Key Laboratory of Information Security Chinese Academy of Sciences Beijing China

ISBN: (纸本)9798350346275

In practice, different styles of side channel attacks can utilize the leakages of a crypto device to recover the used secret key, which can pose a serious threat on the physical security of a crypto device. Among different styles of side channel attacks, template attack can be information theoretically the strongest attack style. However, numerical problems can seriously influence the key-recovery efficiency of template attack in practice, which can make template attack useless in practice. In light of this, the variance analysis based distinguisher is proposed for template attack. Compared with the classical template attack, variance analysis based template attack can reduce the computational complexity of template attack from O(d3) to O(d), where d denotes the number of interesting points. Besides, numerical problems do not exist anymore. Therefore, a large number of interesting points can be chosen to enlarge the leakage exploitation and accordingly optimize the key-recovery efficiency of template attack. The key-recovery efficiency of variance analysis based template attack is evaluated in both simulated and real scenarios, and the evaluation results show that compared with the classical template attack, variance analysis based template attack can maintain a high key-recovery efficiency while significantly decrease the number of traces that should be used in the profiling phase of template attack. © 2022 IEEE.

关键词： Side channel attack

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A Transient Voltage Support Strategy Based on Medium Voltage Photovoltaic grid-Connected Converter during Commutation Failure in the LCC-HVDC System 8

A Transient Voltage Support Strategy Based on Medium Voltage...

引用

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

作者： Lu, Hong Liu, Yali Yuan, Yijia Deng, Weihua Su, Pengfei Jiang, Xirui State Grid Smart Grid Research Institute Co. Ltd. State Key Laboratory of Advanced Power Transmission Technology Sichuan University Chengdu Beijing China State Grid Smart Grid Research Institute Co. Ltd. State Key Laboratory of Advanced Power Transmission Technology Beijing China

ISBN: (纸本)9798350328813

The transient overvoltage caused by commutation failure in the LCC-HVDC system is a key factor limiting the DC transmission capacity. During the commutation failure period, the voltage of the sending AC grid exhibits a characteristic of "first decrease then rise", and the time to transition from low voltage to high voltage is relatively short. The existing photovoltaic (PV) grid-connected converters have the characteristics of long equivalent electrical distance from the grid, small capacity, and weak reactive power support ability, making it difficult to effectively support transient voltage. This article proposes a method of using medium voltage PV grid-connected converters to support the transient voltage caused by commutation failure in the LCC-HVDC system, which actively responds to voltage changes through a grid-forming control strategy and can instantly adjust the reactive power output of the converter. The simulation results show that the proposed method can effectively support the transient voltage and reduce the amplitude of transient overvoltage. © 2023 IEEE.

关键词： commutation failure grid-forming LCC-HVDC photovoltaic grid-connected converter transient voltage support

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A Hybrid Cascaded UHVDC Transmission System at Sending End for High Proportion of Renewable Energy Delivery 7

A Hybrid Cascaded UHVDC Transmission System at Sending End f...

引用

7th IEEE Conference on Energy Internet and Energy System Integration, EI2 2023

作者： Zhou, Jiapei Kou, Longze Li, Fangyuan Gao, Yang Gu, Huaiguang Liu, Dong State Key Laboratory of Advanced Power Transmission Technology State Grid Smart Grid Research Institute Co. Ltd Beijing China

ISBN: (纸本)9798350345094

A scheme of sending end VSC (self-commutation and flexible control)-LCC (low cost, high capacity and strong short-time overload capability) hybrid cascaded UHVDC for delivery of ultra-high-proportion renewable energy had been proposed in this paper. Based on this scheme, the advantages of VSC and LCC can be integrated to realize the multi-time scale dynamic reactive power response and strong virtual inertia response on the sending end as well as the high-frequency wide-range adjustment of active power. The proposed scheme is a possible solution to the issues of static voltage stability, transient over-voltage and low inertia, which are commonly regarded as the main challenges for the delivery of ultra-high-proportion renewable energy with an inevitable weak AC grid. As a result, the capacity requirements of synchronous condenser or STATCOM on sending-end could be reduced significantly with the proposed scheme. The topology and control strategies of this scheme had been explained thoroughly. The superior performance of the proposed scheme has been validated by EMT simulation under various typical operation conditions. © 2023 IEEE.

关键词： Reactive power

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Design and Analysis of Core Reactor Based on Magnetic Powder Material 26

Design and Analysis of Core Reactor Based on Magnetic Powder...

引用

26th International Conference on Electrical Machines and Systems, ICEMS 2023

作者： Liu, Yang Yang, Fuyao Han, Yu Gao, Jie Sun, Hao Wang, Cong State Key Laboratory of Advanced Power Transmission Technology State Grid Smart Grid Research Institute Co. Ltd Beijing China

ISBN: (纸本)9798350317589

In order to solve the problem of noise and hot spot caused by air gap in traditional silicon steel reactor, a series reactor is designed using Fe-Si core material with low permeability. The magnetic properties of Fe-Si material with a magnetic permeability of 60 and the design method of Fe-Si reactor are given. The magnetic field, thermal field, vibration and noise characteristics of Fe-Si series reactor and traditional silicon steel reactor are analyzed by three-dimensional finite element method. The comparison results show that the reactance value of Fe-Si series reactor has a certain attenuation, the winding temperature is slightly lower, the core temperature is higher, and the noise is obviously reduced. A prototype of Fe-Si series reactor is made. The experimental results are in good agreement with the calculated results, which proves the feasibility of using low permeability Fe-Si power material to develop power frequency reactor for power system. © 2023 IEEE.

关键词： Silicon steel

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Optimal Planning of HVDC Converter Stations for AC-DC Mixed Power grid with High Penetration of Renewable Energy 8

Optimal Planning of HVDC Converter Stations for AC-DC Mixed ...

引用

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

作者： Zhou, Jiapei Kou, Longze Li, Fangyuan Liu, Qi Fan, Zheng Liu, Dong State Grid Smart Grid Research Institute Co. Ltd State Key Laboratory of Advanced Power Transmission Technology Beijing China

ISBN: (纸本)9798350328813

High voltage direct current (HVDC) transmission is the best option to deliver generated power especially from renewable energy, e.g. wind and solar farms that are far away from the load center. However, one of the key challenges in designing the HVDC integrated into the receiving end AC power grid is to optimize the location for HVDC converter stations of different capacities. Optimizing the location of HVDC converter stations has significant impact on the system short circuit capacity, voltage stability and multi-infeed short circuit ratio (MISCR). The optimal sizing and placement problem of HVDC converter stations is formulated as a complex multi-criteria decision making which considers economical efficiency, power system stability, and the power flow distribution of the grid. A case study based on the IEEE 39-bus system with high penetration of renewable energy is performed to evaluate the effectiveness of the proposed method. The ranking of the optimal locations is done by combining grey relational theory and technique for order preference by similarity to ideal solution (TOPSIS). The results demonstrate that the proposed method can locate optimal sites for HVDC stations at different capacities. © 2023 IEEE.

关键词： grey relational theory HVDC converter station optimal location TOPSIS

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Research on High Voltage High Capacity Multi-port Energy Router 8

Research on High Voltage High Capacity Multi-port Energy Rou...

引用

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

作者： Weihua, Deng Lanlan, Ji Yali, Liu Zhe, Jiang Naizheng, Han Zhiguang, Lin State Grid Smart Grid Research Institute Co. Ltd State Key Laboratory of Advanced Power Transmission Technology Beijing China

ISBN: (纸本)9798350328813

Energy routers are key devices that promote the utilization and consumption of new energy resources, as well as achieve energy conversion and routing. This article proposes a new idea of high-voltage and large-capacity energy routers for regional energy management. A 110kV seven-port energy router electrical topology is constructed, consisting of three modular multi-level AC/DC converters, three bidirectional DC/DC transformers, and one DC circuit breaker. A detailed analysis is conducted on four different operating modes and the respective control strategies of the energy router. The VF droop controller is designed, including voltage droop control and frequency droop control. For demonstration engineering applications, an energy router start stop control logic has been designed. Finally, the effectiveness of the control strategy proposed in this paper is verified through the switching test waveforms between the main operation mode and auxiliary operation mode on the demonstration project site. © 2023 IEEE.

关键词： Energy router Engineering application Multi-port New energy resources

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The Research on Cluster DC Voltage Balancing of Star-Connected Cascaded H-bridge STATCOM 14

The Research on Cluster DC Voltage Balancing of Star-Connect...

引用

14th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2023

作者： Hu, Kai Zhao, Guoliang Lu, Zhengang Yu, Hongyang Li, Weiguo Dai, Chaobo State Grid Smart Grid Research Institute Co. Ltd State Key Laboratory of Advanced Power Transmission Technology Beijing China

ISBN: (纸本)9798350328233

Star-connected cascaded H-bridge STATCOMs are widely used in power systems due to their modular performance, small output harmonics, and applicability to high voltage. However, the uneven losses of three phases and the unbalanced active power generated by unbalance grid voltages lead to the problem of phase to phase DC voltage unbalance in star-connected cascaded H-bridge STATCOMs. The clustered DC voltage balancing control using zero sequence voltage injection is suitable for star-connected cascaded H-bridge STATCOMs because no zero-sequence current is generated in the three-phase three-wire system. However, the conventional zero-sequence voltage injection method contains many complex operations, such as trigonometric operations, square root and inverse trigonometric operations, etc. These complex operations increase the computational burden of the controller. In order to eliminate the complex operations of the traditional method, this paper proposes an improved phase-to-phase DC voltage equalization control strategy by deriving the active power relationship of the three phases of STATCOM, which has no complex operations such as inverse trigonometric function, and also extracts the unbalanced power directly from the grid voltage as feedforward control, which improves the control effect and dynamic performance of phase-to-phase DC voltage equalization. Finally, the effectiveness of the proposed control method is verified by simulation. © 2023 IEEE.

关键词： Feedforward control

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