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IEEE International Conference on power and Energy systems (ICPES)

作者： Rina Su Junfei Han Yifan Zhang Yuqiang Wang Chaoyu Yu Jinwei He Inner Mongolia Enterprise Key Laboratory of Smart Grid Simulation of Electrical Power System Inner Mongolia Power Research Institute Hohhot China School of Electrical and Information Engineering Tianjin University Tianjin China

ISBN: (纸本)9781665413268

In this paper, a novel multi-functional distributed generation (DG) unit is proposed for active harmonic control of low voltage distribution networks. The proposed system combines the functions of both power generation and active harmonic compensation in the DG interfacing converters. The active harmonic control is achieved by controlling the performance of the converter at the selective harmonic frequency as a controlled harmonic current source to absorb local load harmonics and a controlled harmonic virtual resistor to damp out the feeder resonance. It has been demonstrated that there is no interference between the multiple control objectives. simulation results have been provided to validate the correctness of the proposed approach.

关键词： Damping Resistors Low voltage Reactive power simulation Resonant frequency Interference

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Wide-Area Damping Control Enhanced by Non-Invasive Data Verification Against False Data Injection Attacks

SSRN

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SSRN 2024年

作者： Sun, Zhenglong Long, Hao Li, Zewei Gao, Bo Wei, Xiaoqiang Belikov, Juri Levron, Yoash Department of Electrical Engineering Key Laboratory of Modern Power System Simulation and Control & Renewable Energy State Grid Jiashan County Power Supply Company Jiaxing China State Grid Heilongjiang Electric Power Company Limited Heilongjiang China The Andrew and Erna Viterbi Faculty of Electrical Engineering Technion Israel Institute of Technology Haifa Israel Department of Software Science Tallinn University of Technology Tallinn Estonia Northeast Electric Power University China

The increasing interconnectivity of power systems and the integration of renewable energy sources into the grid have exacerbated the low-frequency oscillation problem, which directly impacts the stability of the power grid. The performance of wide-area damping control (WADC), which is an effective oscillation suppression technique , is susceptible to false data injection attacks (FDIA). This study proposes a non-intrusive data verification method using an adaptive variational autoencoder (AVAE) combined with a deep convolutional neural network (DCNN) to enhance WADC’s resistance to FDIA. The method integrates data dimensionality reduction of AVAE and reconstruction capabilities with DCNN’s feature extraction advantages. Itemploys adaptive thresholds to dynamically track grid data fluctuations, accurately distinguishing between normal and abnormal measurements and improving attack detection and performance discrimination. In addition, the study proposes an intelligent repair process based on latent representations for anomalous data in the repair module, using hierarchical clustering and Gaussian mixture models post-Bayesian inference to repair data. AVAE then reconstructs the repaired data, mitigating attack impacts. simulations on IEEE 39-Bus, 68-Bus, and 118-bus systems demonstrate that this method effectively detects network attacks and restores manipulated signals with minimal reconstruction errors, thus ensuring grid stability and reliability. © 2024, The Authors. All rights reserved.

关键词： Convolutional neural networks

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Using hydrogen energy storage system to improve wind power consumption and low voltage ride through capability

Using hydrogen energy storage system to improve wind power c...

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Sustainable power and Energy Conference (iSPEC)

作者： Li Hang Wang Yuqiang Zhang Yifan Zhong Ming Han Rulei Han Junfei Inner Mongolia Enterprise Key Laboratory of Smart Grid Simulation of Electrical Power Systerm Inner Mongolia Power Research Institute Hohhot Inner Mongolia China

ISBN: (纸本)9781665414401

Aiming at the issue of wind power curtailment, with the goal of improving its absorption capacity and green-friendly grid connection, a wind-hydrogen coupling system model and control strategy are proposed.. A DC bus structure of electrolyzer and fuel cell is constructed, and the mathematical models of direct drive wind turbine, electrolyzer and fuel cell are established. The coordinated control strategy is as follows: when the wind power output is greater than the load demand, the residual power of hydrogen production system by electrolyzing water in electrolyzer will be absorbed; When the wind power output is less than the load demand, the fuel cell will supplement the power balance; In case of short-circuit fault at grid side, the system power is balanced by means of electrolytic hydrogen production to realize low voltage ride through. The simulation results show that the wind hydrogen coupling system can improve the decentralized wind power consumption and low voltage ride through capability.

关键词： Couplings Low voltage Wind energy simulation Hydrogen Fuel cells Wind power generation

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A Partial-Capacity Solid-State Transformer-Based Continuous Co-phase Traction power Supply system

A Partial-Capacity Solid-State Transformer-Based Continuous ...

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Sustainable power and Energy Conference (iSPEC)

作者： Ge Lihong Ao Qilun Han Junfei Zhang Yifan Wang Yuqiang Yu Chaoyu Inner Mongolia Enterprise Key Laboratory of Smart Grid Simulation of Electrical Power Systerm Inner Mongolia Power Research Institute Hohhot Inner Mongolia China

ISBN: (纸本)9781665414401

In this paper, a novel partial-capacity configuration solid-state transformer (PCSST) is proposed for continuous co-phase traction power supply system. This PCSST is characterized with partial-capacity compared with the conventional full-capacity SST which must be capable of transmitting the total load power. For capacity reduction, one output port of Scott traction transformer is connected in series with the proposed PCSST. Thus, partial of the load power is transferred through the Scott traction transformer. The basic operation principle is described and the control strategy is developed for power conditioning requirements. The feasibility of the proposed converter and control strategy is validated by the simulation.

关键词： power conditioning Rails Costs Conferences Rectifiers Transformers Traction power supplies

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Research on control strategy of fault ride-through of MMC-HVDC connected to wind farm

Research on control strategy of fault ride-through of MMC-HV...

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Sustainable power and Energy Conference (iSPEC)

作者： Li Hang Zhang Yifan Wang Yuqiang Han Junfei Yu Chaoyu Inner Mongolia Enterprise Key Laboratory of Smart Grid Simulation of Electrical Power Systerm Inner Mongolia Power Research Institute Hohhot Inner Mongolia China

ISBN: (纸本)9781665414401

During the fault ride-through process of the MMC-HVDC system for the grid-connected offshore wind farm, the unloading circuit does not start to function until the DC voltage reaches a certain value for a period of time, which results in a great impact on the sub-module voltage on the land side, there is a risk of damaging the electronic components, in this paper, the control strategy is improved according to the system characteristics during the fault, and the sub-module voltage is suppressed under the premise of ensuring the system fault ride-through performance. Finally, a semi-physical simulation model of the pseudo-bipolar flexible HVDC transmission system at both ends was built based on the RTDS simulation system, and the improved control strategy was verified in the control and protection device.

关键词： Performance evaluation simulation HVDC transmission Process control Wind farms power system stability Real-time systems

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Microgrid Self-healing Control of Distributed power Supply Combining Particle Swarm Optimization Algorithm

Microgrid Self-healing Control of Distributed Power Supply C...

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Advances in Informatics, Electronics and Education (ISAIEE), International Symposium on

作者： Junfei Han Rulei Han Chaoyu Yu Yuqiang Wang Yifan Zhang Longlong Zhang Ningping Yuan Inner Mongolia Enterprise Key Laboratory of Smart Grid Simulation of Electrical Power System Inner Mongolia Power Research Institute Hohhot China Inner Mongolia Tianda Tiancai Information Technology Co. Ltd. Hohhot China School of Computer Information Inner Mongolia Medical University Hohhot China

Microgrid is an important part of smart grid, and self-healing is a key feature of smart grid. The purpose of this paper is to combine the particle swarm optimization algorithm and the binary particle swarm optimization algorithm to study the self-healing control of the distributed power supply in the microgrid. Can be used to solve nonlinear multi-objective optimization problems with continuous and discrete variables. At the same time, considering the load shedding effects of fault recovery, switch opening and closing times, active and reactive power losses, node voltage drift, distributed generator performance, etc., it becomes a nonlinear, multi-objective function involving continuous or discrete variables.. After the optimal operation of the traditional microgrid system, the power factor and line loss cannot reach the optimal state. The line loss of microgrid 1 is 0.71, the power factor is 0.88, the line loss of microgrid 1 is 0.72, and the power factor is 0.88. In the plan, plan 1 operates the switch 2 times, plan 2 operates 5 times, and finally choose plan 1 with fewer operations.

关键词： Reactive power power supplies Heuristic algorithms power system dynamics Microgrids Switches Time measurement

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Wind-Storage Collaborative Control Strategy for Considering the State of Charge of Energy Storage Batteries

Wind-Storage Collaborative Control Strategy for Considering ...

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smart power & Internet Energy systems (SPIES), International Conference on

作者： Xianmiao Huang Linlin Wu Yu Gong Di Liu Yinchi Shao Jianhui Meng Chenyu Wang Institute of Smart and New Energy State Grid Jibei Electric Power Co. Ltd. Research Institute Beijing China Institute of Smart Grid and New Energy State Grid Jibei Electric Power Co. Ltd. Research Institute Beijing China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Baoding China

With the large number of wind power connected to the grid and the increase of power electronic permeability, the frequency modulation capacity of the power grid is reduced. Energy storage combined with wind power can improve the stability of the system, but most studies do not consider the state of energy storage charge (state of charge, SOC). Considering the typical operation scene of wind power generation and the characteristics of energy storage battery, this paper proposes a wind storage cooperative control strategy considering energy storage battery SOC, considering the residual capacity of energy storage battery SOC and energy storage converter to determine the power of energy storage battery, so as to mobilize the energy storage battery with wind power output to ensure the safe and stable operation of the system. Finally, the wind-storage joint system model is built by Matlab/Simulink simulation platform to verify the proposed cooperative control strategy. The results show that, compared with the existing control strategies, the collaborative strategy proposed in this paper considers the characteristics of wind power output and energy storage battery.

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Surface Modification of Low Temperature Plasma Electrode in Air Atmosphere 9th

Surface Modification of Low Temperature Plasma Electrode in ...

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9th Frontier Academic Forum of electrical Engineering, FAFEE 2020

作者： Li, Yan Zhang, Fei Liu, Xi Luo, Ning Liu, Yang Wu, Xiaodong Han, Xiaogang State Grid Xianyang Electric Power Supply Company Xi’an China International Electrotechnical Commission System Committee Smart Manufacturing System Committee Smart Cities Xi’an China State Key Laboratory of Electrical Insulation and Power Equipment Xi’an Jiaotong University No. 28 Xianning West Road Xi’an China

ISBN: (纸本)9789813366084

Research on plasma surface modification of electric double layer supercapacitors has been widely used. In this paper, the surface of the electrode is modified by low temperature plasma in air atmosphere. It is found that the functional groups grafted on electrode by the surface treatment are mainly oxygen-containing functional groups, which can effectively reduce the interface transfer impedance of the capacitor and increase the specific capacitance (9.34%). The gas used in the treatment method is cheap and easy to obtain, environmentally friendly and non-polluting. It can rapidly process the electrode on a large scale and has practical value. © 2021, Beijing Oriental Sun Cult. Comm. CO Ltd.

关键词： Surface treatment

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Research on the grid-connected Photovoltaic power Scheduling Strategy Considering the Flexible Load

Research on the Grid-connected Photovoltaic Power Scheduling...

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Energy Engineering and power systems (EEPS), International Conference on

作者： Tao Meng Chenggang Li Dexin Li Jiajun Zhang Electric Power Research Institute State Grid Jilin Electric Power Co. Ltd Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education School of Electrical Engineering Northeast Electric Power University Changchun China Electric Power Research Institute State Grid Jilin Electric Power Co. Ltd Changchun China

With the target of "peak carbon dioxide emission" and "carbon neutrality", the installed capacity of renewable energy power generation is increasing rapidly. To improve the absorption capacity of renewable energy, the frequency regulation ability of flexible load is considered. Diffusion strategy is an optimal strategy for the distributed multi-agent system. Considering the flexible load, the grid-connected photovoltaic power applies the diffusion strategy to optimize the scheduling strategy. The effectiveness of the proposed optimal algorithm is verified by a simulation example. The results show that the proposed algorithm can realize frequency regulation, and improve the installed capacity of photovoltaic power generation.

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The Correlation Mechanism that Micro-Structure Parameters of ZnO Varistor to the Macroscopic electrical Characteristics

The Correlation Mechanism that Micro-Structure Parameters of...

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International Conference on electrical Materials and power Equipment (ICEMPE)

作者： Pengfei Meng Jingke Guo Long Zhao Wenhao Lu Zheng Liu Shan Li Kai Zhou Jun Hu College of Electrical Engineering Sichuan University Chengdu China State Grid Linyi power supply company STATE GRID Corporatio of China Linyi China High Voltage Technology Department Extra High Voltage Power Transmission Company of CSG Guangzhou China State Key Laboratory of Intense Pulsed Radiatio Simulation and Effect Northwest Institute of Nuclear Technology Xi’an China State Key Laboratory of Control and Simulation of Power System and Generation Equipment Tsinghua University Beijing China

As the core part of metal oxide arresters, ZnO varistor plays an important part in suppressing the overvoltage of power systems. With the development of UHV technology, the residual voltage and energy capacity of ZnO varistors have put forward higher requirements. The research is carried out from the perspective of material calculation, studied the correlation mechanism between micro-structure parameters and various macroscopic electrical characteristics of ZnO varistor based on Voronoi network. And the microstructure parameters such as grain size and size inhomogeneity were calculated and studied. The study simplified the optimization problem with multiple variates and objectives, into the one with two categories of variates and two categories of objectives. And then proposed specific strategies. The research provides important theoretical basis for improving the performance of ZnO varistors, and witch is of great significance for the design and manufacture of high-performance lightning arresters.

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