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Optimization Method of Shared Energy Storage Configuration on Source-grid-Load Side of Power System

Optimization Method of Shared Energy Storage Configuration o...

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2023 International Conference on Power System technology, PowerCon 2023

作者： Li, Cuiping Liu, Yang Zhang, Tianxun Zhao, Zhiqiang Liu, Haojun Zhu, Xingxu Li, Zhi An, Chenyu Li, Junhui Northeast Electric Power University Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education Jilin132012 China Beijing Technology and Business University Beijing China State Grid Hami Power Supply Company Xinjiang Uygur Autonomous Region Hami Hami839000 China

ISBN: (纸本)9798350300222

With the rise of the application of sharing economy in various fields of power system, As a typical application of shared economy in the field of energy storage, the optimal allocation of shared energy storage on the source-network-load side has been a great topic. The problem dealt with in this paper is the configuration result of the source-grid-load energy storage system under the same control strategy. This paper designs an optimization method for the source-network-load side configuration of generalized shared energy storage in regional power grid: Firstly, according to the extensional usage scenario and demand of energy storage, the alternative set of shared energy storage configuration is constructed. Secondly, based on the profit model of shared energy storage, a power system source-network-load optimization scheduling strategy is proposed. Finally, a numerical example is carried out to prove the feasibility and efficacy of the suggested method. © 2023 IEEE.

关键词： Profitability

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Analysis And Calculation Of The Short-Circuit Current Of Xiamen VSC-HVdc Project 5

Analysis And Calculation Of The Short-Circuit Current Of Xia...

引用

5th IEEE Conference on Energy Internet and Energy System Integration, EI2 2021

作者： Zhu, Lin Gu, Huaiguang Li, Fangyuan Kou, Longze Liu, Dong State Key Laboratory of Advanced Power Transmission Technology Beijing Key Laboratory of DC Grid Technology and Simulation Global Energy Interconnection Research Institute Beijing China State Key Laboratory of Advanced Power Transmission Technology Global Energy Interconnection Research Institute Beijing China

ISBN: (纸本)9781665434256

For the heavy load urban power grid, the short-circuit current is closed to the breaking capacity of the AC breaker. After the voltage sourced converter high voltage direct current (VSC-HVdc) is connected, the short-circuit current of VSC-HVdc will be provided during the fault period, which will cause the short-circuit current exceed the standard value and affect the normal operation of the power grid. Taking the Xiamen VSC-HVdc project as an example, this paper analyses the VSC-HVdc control mode, obtains the short-circuit current calculation method. The Xiamen AC/dc hybrid model is built, and the correctness of the proposed method is verified by simulation. The results show that the amplitude and phase angle of the VSC-HVdc short-circuit current have great influence on the total short-circuit current, and the amplitude is easily controlled by the current limiting controller, so the phase angle control should be emphasized. For Point of Common Coupling (PCC), the short-circuit current of single-phase grounding fault may be larger than three-phase grounding fault, which should be taken into account. The ideas provided in this paper have practical engineering significance for the city power supply by VSC-HVdc. © 2021 IEEE

关键词： Short circuit currents

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Control Strategy of Direct-Driven PMSM Wind Turbines Participating in Fast Frequency Response of Power grid

Control Strategy of Direct-Driven PMSM Wind Turbines Partici...

引用

Energy, Electrical and Power Engineering (CEEPE), International Conference on

作者： Heming Yan Feng Ji Hui Pang Wenxuan Jia Chang Lin Xiangyu Pei State Key Laboratory of Advanced Power Transmission Technology State Grid Smart Grid Research Institute Co. Ltd. Beijing China The college of Electrical and Electronic Engineering North China Electric Power University Beijing China Beijing Key Laboratory of DC Grid Technology and Simulation State Grid Smart Grid Research Institute Co. Ltd. Beijing China

The large-scale grid connection of wind power brings challenges to the frequency stability of the power system, the system inertia decreases, the frequency regulation capability deteriorates, and the traditional wind turbine is difficult to meet the frequency regulation demand of the system. To address the problem of slow response of existing wind turbines participating in frequency regulation, this paper proposes a control method for permanent magnet direct-driven wind turbines participating in fast frequency response of the grid, based on power electronic converters equipped with electromagnetic level control speed to rapidly change the electromagnetic torque of the wind turbine rotor according to the system frequency change, increase or decrease the wind turbine speed to fully utilize the stored or released rotational inertia and achieve fast power regulation of the wind turbine. The results of the frequency step simulation of the permanent magnet direct-driven synchronous wind power system show that the fast frequency regulation response time of the control method proposed in this paper can reach the millisecond level.

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Physical Mechanism and Data Hybrid Modeling for Device-Level Emulation of Modular Multilevel Converter 8

Physical Mechanism and Data Hybrid Modeling for Device-Level...

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8th Asia Conference on Power and Electrical Engineering, ACPEE 2023

作者： Xie, Minhua Peng, Yixuan Zhang, Jiayuan Tang, Haijun Zhu, Ruimin Fan, Wei State Grid Smart Grid Research Institute Co. Ltd. State Key Laboratory of Advanced Power Transmission Technology Beijing China Beijing Key Lab. of DC Grid Technol. and Simulat. State Grid Smart Grid Research Institute Co. Ltd. Beijing China North China Electric Power University School of Electrical and Electronics Engineering Baoding China State Grid Liaoning Electric Power Co. Ltd. Electric Power Research Institute of State Grid Liaoning Electric Power Co Ltd. Shenyang China

ISBN: (纸本)9798350345520

In the modular multilevel converter (MMC), the insulated gate bipolar transistor (IGBT) is one of the most important devices for power conversion. Therefore, an accurate and efficient model of the sub-module is significant for design, monitoring and diagnosis of valve towers. Due to the complex multi-physics field inside the semiconductor device, it is laborious to describe the physical mechanism model in detail. Traditional mechanism models cannot meet the requirements of digital twin applications. In this paper, a new modeling method for sub-modules based on long short-term memory neural network is developed and the model is integrated into the traditional model of MMC for simulation, which is a physical mechanism and data hybrid modeling method to retain both of their advantages. © 2023 IEEE.

关键词： Power converters

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A Data-Driven Method for Fast Calculation of Electromagnetic Radiation Field of Flexible HVdc Converter Valves

A Data-Driven Method for Fast Calculation of Electromagnetic...

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Frontiers of Power and Energy (ACFPE), Asian Conference on

作者： Haijun Tang Minhua Xie Qin Qin Shuncheng Wang Wei Bao Minghui Su State Key Laboratory of Advanced Power Transmission Technology State Grid Smart Grid Research Institute Co. Ltd. Beijing China Beijing Key Laboratory of DC Grid Technology and Simulation State Grid Smart Grid Research Institute Co. Ltd. Beijing China State Grid Shanghai Electric Power Research Institute State Grid Shanghai Municipal Electric Power Company Shanghai China Department of Electrical Engineering North China Electric Power University Baoding China

ISBN: (数字)9798350367676

ISBN: (纸本)9798350378467

In order to solve the problem of time-consuming computation of electromagnetic radiation field on specific planes of flexible HVdc converter valves, this paper proposes a fast calculation method which combines Proper Orthogonal Decomposition (POD) and Radial Basis Function Response Surface method with Linear Polynomial(RBFLP) to improve the calculation efficiency. To validate the accuracy and practicality of this method, a three-phase MMC converter valve antenna model was constructed. The excitation of the antenna model are the spectral quantities of the MMC valve currents and voltages transformed from the time domain. And the calculation results on any field plane will be predicted from the known simulation results on discrete planes from available software. The results show that the maximum absolute error in the test conditions between the reduced-order prediction data and the available software simulation data is 1.1326. And the absolute error gradually decreases as the distance increases. Therefore, this method is suitable for fast calculation of electromagnetic radiation field where efficiency is necessary more than accuracy. Since the results are needed for only a few discrete planes, the simulation of all the needed planes is avoided, especially if there are many needed planes, which is convenient and efficient.

关键词： Accuracy HVdc transmission simulation Electromagnetic radiation Predictive models Valves Software Reduced order systems Response surface methodology Time-domain analysis

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A NOVEL CONTROL METHOD BASED ON THE INSTANTANEOUS THYRISTOR VOLTAGE TO MITIGATE COMMUTATION FAILURE IN HVdc SYSTEMS 10

A NOVEL CONTROL METHOD BASED ON THE INSTANTANEOUS THYRISTOR ...

引用

10th Renewable Power Generation Conference, RPG 2021

作者： Zheng, Lin Zhang, Jianan Liu, Jin Wang, Huafeng Lin, Zhiguang Song, Linwei Liu, Panpan State Key Laboratory of Advanced Power Transmission Technology Global Energy Interconnection Research Institute Co. Ltd. Beijing China Beijing Key Laboratory of DC Grid Technology and Simulation Global Energy Interconnection Research Institute Beijing China

ISBN: (纸本)9781839536069

Commutation failure is a typical fault that occurs in the inverter valves of the HVdc transmission system. Continuous commutation failure will lead to serious results to the power system especially in multi-infeed HVdc power transmission system. In this paper, a novel control method to mitigate commutation failure in HVdc systems due to voltage dips caused by AC system faults is proposed. This detection method is based on instantaneous values of the thyristor voltage and it is realized by Thyristor Triggering and Monitoring (TTM) device and valve base electronics (VBE), which makes the control system react quickly and detect commutation failure with high-precision. After detecting the commutation failure, the firing angle at the inverter station is reduced by a certain angle to extend the commutation margin. The proposed commutation failure mitigation method is tested in various fault simulation using the PSCAD/EMTdc software. A single-infeed HVdc transmission system is created to test the method's effectiveness and a two-infeed HVdc transmission system is developed to study the method's performance in the multi-infeed HVdc transmission system. The test results demonstrate that the proposed method is highly effective in mitigating the continuous commutation failure in both the single-infeed and multi-infeed HVdc transmission system. © The Institution of Engineering and technology.

关键词： Thyristors

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Photovoltaic Multi-Peak MPPT Method with Improved Particle Swarm Algorithm

Photovoltaic Multi-Peak MPPT Method with Improved Particle S...

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Power and Electrical Engineering (ACPEE), 5th Asia Conference on

作者： Zun Ma Xian Meng Chao Xing Binjiang Hu Yihua Zhu Liang Tu System Analysis and DC Technology Research Institute Electric Power Research Institute of Yunnan Power Grid Co. Ltd Kunming China Power system simulation and control technology department State Key Laboratory of HVDC EPRI CSG Guangzhou China Power system simulation and control technology department National Energy Power Grid Technology R&D Centre Guangzhou China Power system simulation and control technology department CSG Key Laboratory for Power System Simulation Guangzhou China

ISBN: (数字)9798350309638

ISBN: (纸本)9798350309645

An MPPT control strategy based on the combination of adaptive nonlinear mutation particle swarm optimization algorithm is proposed. The algorithm uses the tanh function to control the inertia weight, balances the ability of particles to optimize globally and locally, uses the ISRU function to control the learning factor, balances the weight relationship between individual learning and social learning, and improves the convergence speed of the algorithm. The nonlinear Cauchy mutation operation is proposed to expand the scope of optimization; Finally, the perturbation and observation method is used to track locally near the maximum power point to reduce power oscillation. The simulation validates that the photovoltaic MPPT control strategy based on the improved particle swarm algorithm can effectively get the maximum power point under shading conditions and improve the output efficiency of the PV array.

关键词： Maximum power point trackers Photovoltaic systems Electrical engineering Perturbation methods Asia Particle swarm optimization Oscillators

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Research on Photovoltaic MPPT Based on Improved Butterfly Algorithm

Research on Photovoltaic MPPT Based on Improved Butterfly Al...

引用

IEEE International Conference on Power and Power and Renewable Energy (ICPRE)

ISBN: (数字)9798350377460

ISBN: (纸本)9798350377477

To solve slow response speed and poor stability of traditional MPPT algorithms under rapidly changing environmental conditions, a MPPT control strategy combining improved butterfly algorithm and disturbance observation method is proposed. Firstly, the butterfly position in the population is initialized by Tent map, increasing the search space; Secondly, Gaussian mutation strategy is introduced to make the algorithm break out of local extremes; Then, a dynamic probability switching mechanism is adopted to balance the weight relationship between global and local search, improving algorithm optimization efficiency; Finally, in the later stage, disturbance observation method is used to track the maximum power and reduce power oscillation. simulation examples show that the proposed algorithm can find the maximum power point quickly and accurately under both static and dynamic shading conditions, and the power output is more stable.

关键词： Maximum power point trackers Photovoltaic systems Renewable energy sources Heuristic algorithms Switches Aerospace electronics Stability analysis Oscillators Optimization

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Harmonic Stability Analysis and Damping Strategy for dc system of MMC-HVdc Across Wide Frequency Range

Harmonic Stability Analysis and Damping Strategy for DC syst...

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2021 International Conference on Power System technology, POWERCON 2021

作者： Kou, Longze Peng, Yixuan Ji, Ke Zhu, Lin Ji, Feng Liu, Dong Global Energy Interconnection Research Institute Co. Ltd State Key Laboratory of Advanced Power Transmission Technology Beijing China Global Energy Interconnection Research Institute Co. Ltd Beijing Key Laboratory of DC Grid Technology Simulation Beijing China

ISBN: (纸本)9781665407373

The harmonic resonance and instability problems become prominent in recent years with the development and application of modular multilevel converter (MMC) based HVdc system. The impedance model of MMC can be used to facilitate the analysis of harmonic stability and the design of mitigation method. In this paper, the accurate dc impedance model of MMC is firstly derived based on harmonic state space (HSS) method. The internal dynamics and control actions (control loop delay included) of MMC are considered in the derivation process. With consideration of impedance characteristics of dc transmission lines, the harmonic stability for the dc system of MMC-HVdc are theoretically analyzed across a wide frequency range and the possible harmonic resonance problems are revealed. On this basis, a modified dc damping control is proposed to mitigate the harmonic resonances and improve the harmonic stability at all possible frequency points. At last, the proposed model and control method are validated by simulation results. © 2021 IEEE.

关键词： Damping

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DISCRIMINATION METHOD OF HVdc COMMUTATION FAILURE BASED ON VALVE VOLTAGE AND VALVE CURRENT

DISCRIMINATION METHOD OF HVDC COMMUTATION FAILURE BASED ON V...

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2021 Annual Meeting of CSEE Study Committee of HVdc and Power Electronics, HVdc 2021

作者： Fan, Zheng Zhu, Lin Wei, Xiaoguang Liu, Dong State Key Laboratory of Advanced Power Transmission Technology Global Energy Interconnection Research Institute Co. Ltd. Beijing China Beijing Key Laboratory of Dc Grid Technology and Simulation Global Energy Interconnection Research Institute Co. Ltd. Beijing China

ISBN: (纸本)9781839537035

Commutation failure is one of the most common faults on the inverter side of HVdc transmission system. Rapid and accurate discrimination of commutation failure is the premise of resisting commutation failure. In this paper, a method for discriminating HVdc commutation failure based on valve voltage and valve current is proposed. According to the process and development of commutation failure, combined with the two waveform information of valve voltage and valve current, the most direct information characteristics of commutation failure are extracted for discrimination. Compared with the discrimination method of single use of converter valve voltage or converter valve current, this method not only accurately discriminates the commutation failure, but also improves the discrimination speed and shortens the discrimination time. Taking CIGRE HVdc benchmark model as simulation example, the logic module of HVdc commutation failure discrimination method based on valve voltage and valve current is built in PSCAD/EMTdc to verify the effectiveness of the proposed method. © 2021 IET Conference Proceedings. All rights reserved.

关键词： Logic devices

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