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International Conference on Optical Communications and Networks (ICOCN)

作者： Xuemei ZHENG Xudong WANG Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education(Northeast Electric Power University) Jilin China College of Electrical Engineering Northeast Electric Power University Jilin China

In this paper, a slot-coupled microstrip line filter based on Defected Ground Structure (DGS) is designed. It is a band-pass filter. It is simulated by HFSS software. At the same time, the equivalent circuit of the designed filter is extracted by ADS software. The performance of the filter is verified by comparing the simulation results of the two filters.

关键词： Band-pass filters Microstrip filters Microwave filters Resonator filters Optical filters power harmonic filters Equivalent circuits

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Design of Metamaterial Microstrip Array Antenna

Design of Metamaterial Microstrip Array Antenna

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International Conference on Optical Communications and Networks (ICOCN)

作者： Xuemei ZHENG Zhiqi RONG Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education (Northeast Electric Power University) Jilin China College of Electrical Engineering Northeast Electric Power University Jilin China

In this paper, a new type of metamaterial structure based on open resonant ring is proposed. On this basis, a microstrip array antenna based on metamaterial is designed and simulated by HFSS.

关键词： Microstrip antenna arrays Microstrip antennas Metamaterials Microstrip Magnetic materials

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Economic Optimal Dispatch of Grid-connected Microgrid Based on Improved Genetic Algorithm 2

Economic Optimal Dispatch of Grid-connected Microgrid Based ...

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2nd International Conference on energy, Electrical and power Engineering, CEEPE 2019

作者： Sun, Li Zhao, Shujian Ma, Chenglian Chen, Naixin Yao, Tianliang Key Laboratory of Modern Power System Simulation and Control and Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin Jilin132012 China Power Research Institute of State Grid Jilin Electric Power Co. Ltd. Changchun Jilin130021 China Changchun Power Supply Company State Grid Jilin Electric Power Co. Ltd. Changchun Jilin130000 China Gansu Electric Power Design Institute Limited Company of China Energy Construction Group Lanzhou730050 China

Nowadays, the demand for energy is expanding, the fossil resources are on the verge of exhaustion, and the ecological environment is getting worse and worse. In this form, this paper studies the economic optimal dispatch of microgrid under the background of energy saving and emission reduction. Firstly, the mathematical model of microgrid composed of distributed power, energy storage devices and loads is established. Secondly, under the background of energy saving and emission reduction, the objective function of multi-objective optimal operation of microgrid is established considering both economic and environmental aspects. Finally, the improved Genetic Algorithm is used to solve the objective function. The results of optimization can reduce microgrid system generation cost. © 2019 IOP Publishing Ltd. All rights reserved.

关键词： Genetic algorithms

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Research on Parameter Identification Method of Generator Excitation system Based on Differential Evolution Algorithm

Research on Parameter Identification Method of Generator Exc...

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作者： Nan Li Yuqun Liu Bin Geng Key Laboratory of Modern Power System Simulation and Control and Renewable Energy Technology Ministry of Education Northeast Electric Power University College of Electrical Engineering Northeast Electric Power University Jilin Electric Power Co. Ltd.

In order to solve the problem of large parameter identification error caused by nonlinear links of excitation system being triggered easily when transient stability is under fault state, an improved differential evolution algorithm for system parameter identification is proposed by using the characteristic of artificial intelligence algorithm that the nonlinear link is approximated infinitely through optimization. The improvement of the algorithm solves the problems of slow convergence speed, poor fine optimization ability and easily to produce local optimum when classical artificial intelligence algorithm identifies the parameters of non-linear links. At the same time, in order to solve the problem of inaccurate parameters in the whole identification, a decomposition link identification strategy is proposed. The example analysis shows that the algorithm improves the convergence speed, avoids local optimum and improves the convergence accuracy. According to the proposed parameter identification strategy, the excitation system is decomposed and identified, which improves the accuracy of generator excitation system parameter identification, and provides an accurate model and method for power system stability analysis

关键词： Research on Parameter Identification Method of Generator Excitation system Based on Differential Evolution Algorithm

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Optimal dispatching strategy in the domain with energy storage and heat storage taking into account deep regulation of thermal power plants

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IOP Conference Series: Earth and Environmental Science 2021年第1期675卷

作者： Weichun Ge Debao Liu Guannan Deng Tieying Zhao Shunjiang Wang Yu Guo State Grid Liaoning Electric Power Co. Ltd. Shenyang 110006 China Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education(Northeast Electric Power University) Jilin 132012 China Anshan Power Supply Company of Liaoning Electric Power Co. Ltd. Anshan 114002 China

In recent years, the installed capacity of wind power has been increasing, and the phenomenon of regional wind abandonment has become prominent. In order to improve the wind power accommodation, the domain definition is introduced, which stipulates that the periods without wind abandonment and load shedding during normal output of thermal power units are normal domains, the periods without wind abandonment or load shedding when thermal power units exert depth adjustment are abnormal domains, and the periods with wind abandonment or load shedding during depth adjustment of thermal power units are emergency domains. Give full play to the depth adjustment of thermal power units in abnormal and emergency areas, improve the accommodation of clean energy, and realize the coordinated and optimized scheduling of multiple energy sources including electricity storage and heat storage systems. To accommodate clean energy, an economic dispatching model including the cost of thermal power, the cost and benefit of power storage and heat storage system is constructed, and the optimal value of the model is solved by calling CPLEX with Matlab. The scheduling results not only ensure the safety and reliability of the whole network operation but also maximize the consumption of wind energy and realize the optimal clean energy scheduling.

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The wind-PV-hydro-thermal multi-source cleaning dispatch with the influence of super-power thermal storage boiler

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IOP Conference Series: Earth and Environmental Science 2021年第1期675卷

作者： Weichun Ge Debao Liu Huan He Shunjiang Wang Zhen Jiao Xuanyuan Zhao State Grid Liaoning Electric Power Co. Ltd. Shenyang 110006 China Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education(Northeast Electric Power University) Jilin 132012 China Anshan Power Supply Company of Liaoning Electric Power Co. Ltd. Anshan 114002 China

Aiming at the problem of serious waste of clean energy caused by the randomness and volatility of clean energy output during the winter heating period in Northeast China, this paper proposes a dispatching scheme of super-large power regenerative electric boiler, which fully combines the different physical characteristics and respective advantages of power systems and thermal systems. To maximize the economic and environmental benefits of wind-PV-hydro-thermal and other multi-energy joint dispatching, an optimal dispatch model is constructed with the lowest overall power generation cost as the dispatch target considering the power generation operating cost of the thermal power unit, the cost of abandoned light, the cost of abandoned water, the cost of abandoned wind, and the heating income of super-large power storage boilers combined together. The improved PSO algorithm based on multi-agent is used to solve the model. The results of the calculation example show that, after considering the absorption capacity of the super-large power regenerative electric boiler, the operating cost of the system is reduced by about 10%, and under the premise of ensuring the safe and stable operation of the system, the utilization rate of clean energy utilization and the system operation economy is improved.

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Multi-domainsdispatching method for power system considering energy storage

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IOP Conference Series: Earth and Environmental Science 2021年第1期675卷

作者： Weichun Ge Debao Liu Tao Liu Shunjiang Wang Junfa Liu Lei Hu State Grid Liaoning Electric Power Co. Ltd. Shenyang 110006 China Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education (Northeast Electric Power University) Jilin 132012 China Anshan Power Supply Company of Liaoning Electric Power Co. Ltd. Anshan 114002 China

Reasonably arranging the matching of power sources is an effective mean to improve the capacity of new energy consumption. Using the dispatching characteristics of the transferable load of the energy storage systems can play an important role in the actual dispatch of the power system. From the perspective of flexible scheduling, a multi-domain scheduling method is proposed, which comprehensively considers the influence of factors such as load, wind power output random fluctuations and system adjustment capabilities, and redistributes it into three control domains. That is, the normal control domains with the goal of completely absorbing wind power, anomaly control domain where the energy storage systems needs to be used to absorb wind power, and the emergency control domain where there is no regulation ability and forced to abandon wind. To maximizing clean energy consumption, CPLEX software is used to optimize output and realize multi-domain green economic dispatch. The calculation example shows that this method can effectively improve the absorption capacity of clean energy.

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Investigating the transient torque of turbo-generators in a power system integrating wind farms

Investigating the transient torque of turbo-generators in a ...

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8th renewable power Generation Conference (RPG 2019)

作者： Bowen Yang Gangui Yan Xiaorong Xie Yanhui Wang Jian Tang Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin China State Key Laboratory of Power System Department of Electrical Engineering Tsinghua University Beijing China State Grid East Mongolia Electric Power Supply Co. Ltd. Hohhot China

ISBN: (数字)9781839531248

ISBN: (纸本)9781839531255

The renewable energy sources connected to the grid will cause the power system to oscillate and even affect neighbouring turbo-generators. For example, the wind turbines and their converter control systems may cause shaft torsional vibration in the steam turbine units, which affects the safety of the system. Therefore, it is of significance to investigate the transient torque of turbo-generators in a power system integrating wind farms. This paper takes a power plant in Inner Mongolia area of China as the case, the power of which is transmitted via the AC/DC hybrid power system with wind and thermal power. A typical equivalent system model of the wind-thermal-bundled access network is established firstly. Consider setting the fault on the line with series capacitor compensation and observe units' torque variation. Then the impact on sub-synchronous resonance (SSR) characteristics from many factors was investigated through the time-domain simulation, including the unit combination mode (including the long-term accessed DFIGs condition), the fault type and position, the system equivalent impedance, the fault starting/clearing time and the mechanical mutual damping coefficient of shafting, etc. Finally, the influence of each factor on transient torque is summarized, and the inner associations between the shaft torsional vibration in the turbo-generators and the converter-based wind turbines are clarified.

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Comparisons of MVAC and MVDC systems in Dynamic Operation, Fault Protection and Post-Fault Restoration

Comparisons of MVAC and MVDC Systems in Dynamic Operation, F...

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Annual Conference of the IEEE Industrial Electronics Society

作者： Gen Li Jun Liang Lu Zhang Gangui Yan Tibin Joseph School of Engineering Cardiff University Cardiff United Kingdom College of Information and Electrical Engineering China Agricultural University Beijing China Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin China

One of the most significant obstacles preventing the large-scale application of direct-current (DC) technology in medium voltage (MV) distribution networks is their fault protection. The existing AC relay protection needs to be changed or redesigned to protect the future overlay MVAC and MVDC distribution networks. Therefore, a comprehensive understanding of the dynamic and fault behavior and post-fault restoration strategies of MVAC and MVDC systems are critically important. Moreover, a comparison of MVAC and MVDC systems during a fault will also contribute to designing the protection systems of hybrid MV AC/DC systems. In this paper, the challenges of protecting DC faults of MVDC systems and possible solutions are first introduced. Then, the fault characteristics and post-fault restoration of MVDC and MVAC distribution systems are compared and investigated through case studies. Time-domain simulations have been conducted in PSCAD/EMTDC. The work in this paper will be valuable for the protection design for future hybrid MV AC/DC systems.

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Scheduling of Fully renewable energy systems with CSP Plants and Pumped Storage

Scheduling of Fully Renewable Energy Systems with CSP Plants...

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China International Electrical and energy Conference (CIEEC)

作者： Yang Cui Siyu Huang Huiquan Zhang Hongbo Li Key Laboratory of Modern Power Sysntem Simulation and Control & Renewable Energy Technology Ministry of Education (Northeast Electric Power University) Ji Lin China State Grid Jilin Power Co. Ltd. Training Center Ji Lin China

ISBN: (数字)9781728116754

ISBN: (纸本)9781728116761

energy crisis and environmental pollution are becoming increasingly serious. Increasing the penetration rate of renewable energy in the power system can effectively solve this problem. Wind power and photovoltaic power generation are fluctuating power sources, and their large-scale interconnection will increase the difficulty of grid scheduling. Therefore, based on the regulation characteristics of concentrating solar power station, this paper proposes a green power dispatching strategy for power system with full renewable energy. The purpose of this strategy is to promote the consumption of renewable energy. The cost of power generation of each unit of the system and the security operation constraints of the grid are considered comprehensively. Finally, CPLEX optimization software was used to solve the model. The results verify the feasibility and validity of the proposed model.

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