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IEEE Conference on Energy Internet and Energy System Integration (EI2)

作者： Ning Chen Dajun Jiang Minhui Qian Zhengyang Hu Linan Qu Lei Zhang State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute Nanjing China Renewable Energy Depatement China Electric Power Research Institute Nanjing China School of Electrical Engineering Southeast University Nanjing China

Due to wind power forecasting error, active power control may not satisfy the control objective. By analysis, the main reason is the asymmetry of power forecasting error. For this, an active power control strategy considering the asymmetry of wind power forecasting error is proposed. Using historical data, wind power forecasting error and its confidence interval are estimated. And confidence interval of wind power forecasting is introduced to establish the optimization model for dispatching active power among wind farms. Then the asymmetry power forecasting error can be compensated by the model. Based on this, operation risk is introduced to optimize the power distribution strategy. Then a simulation is designed using actual data of one wind power base in China. The results show that the proposed strategy is reasonable and effective to improve the performance of active power control of wind power and reduce the risk of power shortage.

关键词： Wind farms Wind power generation Forecasting power control Wind forecasting Renewable energy sources Predictive models

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Design of multichannel real-time data transceiver for wireless meter reading network

Design of multichannel real-time data transceiver for wirele...

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World Congress on Intelligent control and Automation (WCICA)

作者： Ting Yuan Shijie Cui Zhijun Shang Peng Zeng Haibin Yu Chuanzhi Zang Qiang Gao Ping Li Ming Guan Jing Zhang Panjin power supply company State Grid Liaoning electric power company limited Panjin China Shenyang Institute of Automation Chinese Academy of Sciences Shenyang China Key Laboratory of Networked Control Systems Chinese Academy of Sciences Shenyang China Electric power research institute State Grid Liaoning electric power company limited Shenyang China

Debugging and protocol conformance testing of power meter reading system which is based on wireless sensor network is complex, aiming at this problem, we develop a powerful, flexible use, convenient carrying multichannel real-time data monitoring and transmitting device in this paper. The hardware realization and working principle of multichannel synchronous data transceiver are introduced in detail. On this basis, its hardware scheme and software flow for wireless meter reading network are designed. The tests show that, the device is with good real-timeand high stability which is a good debugging and testing device for wireless meter reading network.

关键词： Field programmable gate arrays Wireless sensor networks Wireless communication Meter reading Radio frequency Synchronization Debugging

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Fuzzy control Based Virtual Synchronous Generator for Self-Adaptative control in Hybrid Microgrid

SSRN

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SSRN 2022年

作者： Lyu, Ling Wang, Xuesong Zhang, Liang Zhang, Zhe Koh, Leong Hai Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin132012 China State Grid Hebei Electric Power Company Cangzhou Power Supply Company Cangzhou061000 China School of Electrical and Electronic Engineering Nanyang Technological University 639798 Singapore National Metrology Centre 138635 Singapore

When there is a large penetration of renewable energy sources, maintaining the stability of a low-inertia microgrid becomes a major difficulty. However, in such systems, the virtual inertia values are often fixed constants, and the choice of their values will significantly affect the frequency and voltage stability of the microgrid. Higher frequency and voltage oscillations may occur due to improper selection of fixed virtual inertia values. Therefore, virtual inertia-based control has attracted a lot of attention. In this paper, an adaptive virtual inertia control system using a fuzzy system is proposed through the setting of fuzzy logic rules and affiliation functions to provide adaptive inertia control for the system to ensure the stability of frequency and voltage. In the proposed adaptive control strategy, the virtual inertia values are automatically adjusted according to the signal deviation and rate of change of the actual system, avoiding the selection of inappropriate inertia values and providing fast inertial response. simulation and experimental results show that the proposed adaptive control algorithm, by combining the advantages of large inertia and small inertia, enables effective improvement of the dynamic response of the system voltage and frequency in both rectifier and inverter modes. The effectiveness of the proposed control strategy is verified. © 2022, The Authors. All rights reserved.

关键词： Fuzzy control

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Improved Direct power control of Doubly Fed Induction Generator Without Phase-Locked Loop

Improved Direct Power Control of Doubly Fed Induction Genera...

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Sustainable power and Energy Conference (iSPEC)

作者： Huiwen Kong Jing He Yikai Liu Peng Cheng Jing Ma China Institute of Energy and Transportation Integrated Development North China Electric Power University Changping Direct Beijing China State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute Haidian Direct Beijing China

ISBN: (数字)9781728191645

ISBN: (纸本)9781728191652

Direct power control is widely used in renewable power generation, due to the advantages of simple implementation and fast dynamic response. This paper proposes an improved direct power control of doubly fed induction generator (DFIG) without phase-locked loop (PLL), which is implemented in the stationary reference frame. In order to deal with the time-varying voltage matrix-related dynamics of active and reactive powers for a DFIG in the stationary reference frame, the modulated active and reactive voltage are introduced. By this means, the time-varying voltage matrix-related dynamics of DFIG active and reactive powers are changed into a constant coefficient-related equation, thereby resulting in a simpler implementation. Meanwhile, the modulated rotor voltage can be obtained from the modulated active and reactive voltages based on DFIG rotor position. Then, a linear controller can be introduced to achieve the decoupling regulation and fast tracking of active and reactive powers. Finally, the experimental results are provided to confirm the effectiveness and frequency adaptability of the proposed method.

关键词： Reactive power power control Doubly fed induction generators Rotors Regulation Phase locked loops Voltage control

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Cathode Pressure control of Air Supply System for PEMFC⋆ ⁎

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IFAC-PapersOnLine 2021年第10期54卷 247-252页

作者： Huayang Liu Hai Yin Tianwei Ding Xiaoliang Huang Jinwu Gao State Key Laboratory of Automotive Simulation and Control Jilin University Changchun 130022 China Department of Control Science and Engineering Jilin University Campus Nanling Changchun 130022 China Research and Development Institute China FAW Group Company Changchun 130013 China Chalmers University of Technology Department of Electrical Engineering Division of Electric Power Engineering SE–412 96 Göteborg Sweden

This paper proposes a backstepping method controller for the polymer electrolyte membrane fuel cell (PEMFC)air supply system. The control objective is adjusting the cathode pressure to its reference value quickly, in order to solve the problem of excessive extreme pressure difference between anode and cathode in practice. Considering model uncertainty and some disturbances, we design an extend state observer (ESO) to estimate disturbances. Next, a backstepping method is proposed to adjust control law. Finally, the experiment results demonstrate the effectiveness and robustness of the control strategy.

关键词： PEMFC Air supply system Cathode pressure tracking control ESO Backstepping method

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Maximizing Wind power Injection by Transmission Switching and DLR with Voltage Stability Constraints

Maximizing Wind Power Injection by Transmission Switching an...

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IEEE/IAS Industrial and Commercial power System Asia (I&CPS Asia)

作者： Ke Wu Lei Wang Hengxu Ha Mei Zhang School of Electrical and Electronic Engineering Shandong University of Technology Zibo China Electric Power Research Institute of Hainan Power Grid China Southern Power Grid Company Ltd. Haikou China State Key Laboratory of Operation and Control of Wind Energy & Storage Systems China Electric Power Research Institute Beijing China

ISBN: (数字)9798350352290

ISBN: (纸本)9798350352306

This paper proposes a maximum wind power injection (MVPI) problem under the engineering operation requirements of modern power systems and voltage stability constraints. To dig the access capacity of power grid for wind power, dynamic line rating (DLR) and optimal transmission switching (OTS) are jointly co-optimized to provide flexible operation of power systems. A novel DLR technique independent ambient parameter is proposed with the line parameter correction. The proposed problem is a mix-integer nonlinear programming problem that is hard to solve directly. Hence, a three-stage methodology is developed, which has been applied on the IEEE 24-bus RTS system, the IEEE 118-bus power system. The computational results show the effectiveness of the conducted model in maximizing the usage of wind power.

关键词： Wind energy power system dynamics Voltage Switches power system stability Wind power generation Programming Stability analysis power grids Numerical stability

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Modeling of Doubly Fed Wind power Generation System and simulation Study on Grid-Connection Stability

Modeling of Doubly Fed Wind Power Generation System and Simu...

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Intelligent power and systems (ICIPS), International Conference on

作者： Jingyue Zhang Jie Zhang Yufeng Hu Yuanhong Lu Libin Huang Yanjun Zhao Haiping Guo State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid Guangzhou 510663 China Southern Power Grid Guangzhou China National Energy Power Grid Technology R&D Centre Guangzhou 510663 China Southern Power Grid Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou 510663 China Southern Power Grid Guangzhou China CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou 510663 China Southern Power Grid Guangzhou China National Energy Power Grid Technology R&D Centre Guangzhou 510663 Guangzhou China

ISBN: (数字)9798331532765

ISBN: (纸本)9798331532772

Addressing the stability challenges posed by the unpredictability and intermittent nature of wind power output during grid integration, and aiming to enhance the understanding of factors influencing grid stability upon wind power system connection and to implement efficient control measures, a grid- connected model of a doubly fed induction generator (DFIG) was established utilizing a customized version of the RTRES (Real-Time power System simulation) software, specifically designed for emerging power systems and aligned with wind farm realities. Stability simulations for grid connection were conducted under both voltage regulation mode and reactive power regulation mode across a range of wind speeds, revealing distinct technical behaviors. The findings suggest that the generator's terminal voltage, terminal current, active power, reactive power, and rotor speed exhibit strong correlations with variations in wind speed, and that all parameters are capable of stabilizing following initial disturbances.

关键词： Reactive power Wind speed Rotors power system stability Wind power generation Stability analysis Software Regulation Wind turbines Voltage control

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Multi-Stage Expansion Planning for Decarbonizing Thermal Generation Supported Renewable power systems Using Hydrogen and Ammonia Storage

arXiv

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arXiv 2023年

作者： Yu, Zhipeng Lin, Jin Liu, Feng Li, Jiarong Chi, Yingtian Song, Yonghua Ren, Zhengwei State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department of Electrical Engineering Tsinghua University Beijing100087 China Sichuan Energy Internet Research Institute Tsinghua University Chengdu610213 China Department of Electrical and Computer Engineering University of Macau 999078 China Department of Electrical Engineering Tsinghua University Beijing100087 China

—Large-scale centralized development of wind and solar energy and peer-to-grid transmission of renewable energy source (RES) via high voltage direct current (HVDC) has been regarded as one of the most promising ways to achieve goals of peak carbon and carbon neutrality in China. Traditionally, large-scale thermal generation is needed to economically support the load demand of HVDC with a given profile, which in turn raises concerns about carbon emissions. To address the issues above, hydrogen energy storage system (HESS) and ammonia energy storage system (AESS) are introduced to gradually replace thermal generation, which is represented as a multi-stage expansion planning (MSEP) problem. Specifically, first, HESS and AESS are established in the MSEP model with carbon emission reduction constraints, and yearly data with hourly time resolution are utilized for each stage to well describe the intermittence of RES. Then, a combined Dantzig-Wolfe decomposition (DWD) and column generation (CG) solution approach is proposed to efficiently solve the large-scale MSEP model. Finally, a real-life system in China is studied. The results indicate that HESS and AESS have the potential to handle the intermittence of RES, as well as the monthly imbalance between RES and load demand. Especially under the goal of carbon neutrality, the contribution of HESS and AESS in reducing levelized cost of energy (LCOE) reaches 12.28% and 14.59%, respectively, which finally leads to a LCOE of 0.4324 RMB/kWh. Copyright © 2023, The Authors. All rights reserved.

关键词： Carbon

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Analysis and Design for Hydrogen-Fueled Cascade Solid Oxide Fuel Cell System

SSRN

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SSRN 2023年

作者： Liu, Peiyuan Zhang, Yongliang Zhu, Jianzhong Han, Minfang Sun, Kaihua Zhong, Haijun Zhang, XueRui State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department of Energy and Power Engineering Tsinghua University Beijing100084 China Xuzhou Huatsing Jingkun Energy Co. Ltd. Jiangsu Province 221005 China Petrochemical Research Institute China National Petroleum Corporation Beijing112206 China Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China

Maximizing total fuel utilization is the key to improving the electrical efficiency of solid oxide fuel cell (SOFC) systems. The cascade system can achieve this effectively, but there are fewer studies on hydrogen-fueled cascade systems, and the determination of suitable rated power ratios needs a basis. Because of the characteristics of cascade systems, a fast model that can predict performance at low flow rates and low hydrogen partial pressures is required. Using multiple sets of experimental data, this study developed and validated an improved semi-empirical model, which accurately predicted the industrial-sized cell performance at different flow rates and hydrogen partial pressures. On this basis, the basic parallel and cascade system models were established. The effects of fuel flow rate, rated power ratio, split ratio, and constraints on the system performance were studied and analyzed, and the appropriate design and operation parameters of the cascade system were determined. The results indicated that the cascade system can significantly improve electrical efficiency compared to the parallel system by selecting suitable design parameters. In the example of a 10-kW rated power system design, the cascade system improved the electrical efficiency by over 9% at rated power compared to the parallel system. The results obtained provide valuable reference for related research and offer guidance for system design. © 2023, The Authors. All rights reserved.

关键词： Electrical efficiency

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Study on Hardware-in-the-loop Model and Low Voltage Ride-through Characteristics of Photovoltaic power Station

Study on Hardware-in-the-loop Model and Low Voltage Ride-thr...

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IEEE Electronic power Grid (eGrid)

作者： Liqiang Wang Bin Cao Qi Wang Yu Cong Haiyan Wu Zhang Xiaolin Institute of New Energy Technology Inner Mongolia Electric Power Research Institute Hohhot China Institute of Electric Power System Technology Inner Mongolia Electric Power Research Institute Hohhot China State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute Beijing China

ISBN: (数字)9781728157047

ISBN: (纸本)9781728157054

In order to prevent large-scale disconnection accidents of photovoltaic power stations caused by voltage fluctuations and faults in power grids, low voltage ride-through characteristics and other detection tests are needed when photovoltaic power stations are connected to power grids. At present, field test and type test are the main methods of detection, but due to the limitation of detection devices and test conditions, the evaluation of low voltage ride-through characteristics of photovoltaic power stations still remains in the single-machine detection mode, which ignores the interaction between photovoltaic inverters and inverters, inverters and static var generator(SVG) devices. The test results cannot truly reflect the low voltage traversing characteristics of the photovoltaic power stations. Using RT-LAB hardware-in-the-loop simulation platform, real photovoltaic inverters and SVG controllers are introduced to build simulation models of photovoltaic power stations. The differences between single-machine detection of photovoltaic inverters and reactive power compensation devices and low-voltage ride-through characteristics detection of the whole station are compared and studied. The simulation results show that, compared with the stand-alone test, the whole station simulation modeling test method can reflect the voltage rise caused by the reactive power characteristics of photovoltaic inverters and SVG devices after the drop, and more truly reflect the low voltage traversing characteristics of photovoltaic power stations.

关键词： Inverters Photovoltaic systems power system stability Low voltage Computational modeling

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