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2011 International Conference on Advanced power System Automation and Protection, APAP 2011

作者： Liu, Kun Dong, Xinzhou Wang, Bin Shi, Shenxing State Key Lab. of Control and Simulation of Power Systems and Generation Equipments Dept. of Electrical Engineering Tsinghua University Haidian District Beijing 100084 China

ISBN: (纸本)9781424496198

This paper analyzes the general process of power flow transferring and divides it into four parts: 1) the process of first phase selection after fault occurs;2) the process of selective action at the first time;3) the process of second phase selection and status confirmation;4) the process after status confirmation. It points out that the issue of asymmetrical flow transferring is a critical process which must be put emphasis on. Then it proposes a method to identify this process, and discuss different solution methods. © 2011 IEEE.

关键词： Electric load flow

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Performance Ratio Test and Uncertainty Evaluation of Photovoltaic power Generation System based on Linear Regression 5

Performance Ratio Test and Uncertainty Evaluation of Photovo...

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

作者： Yang, Qingbin Xu, Lianghui Xia, Lie Chen, Zhilei Zhang, Shuangqing Zhou, Rongrong State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute Beijing China

ISBN: (纸本)9781665434256

with the development of photovoltaic industry technology, the installed capacity of photovoltaic power generation is increasing, and the evaluation of performance ratio (PR) of photovoltaic power generation system is extremely important. The PR test of photovoltaic power generation system has been studied and defined in domestic and foreign standards early, and test methods have also been given, but these test methods have a strong dependence on the weather conditions during testing, and the uncertainty evaluation is extremely difficult. In this paper, a testing and evaluation method including uncertainty evaluation for PR of photovoltaic system based on linear regression is proposed. This method reduces the dependence on the weather conditions during the whole testing period, and also makes the uncertainty evaluation feasible. Finally, a numerical example proves the rationality of using this method to test the PR of photovoltaic power generation system. Compared with the traditional method, it is shown that this method reduces the sensitivity to the weather conditions in the test, it can truly reflect the performance of the photovoltaic power generation system, and has a higher engineering practice and application value. © 2021 IEEE

关键词： Linear regression

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Research and Application of Rapid Frequency Response Technology for New Energy power Station

Research and Application of Rapid Frequency Response Technol...

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2019 IEEE PES Innovative Smart Grid Technologies Asia, ISGT 2019

作者： Hua, Guanghui Hu, Ruwei He, Weiguo Kong, Ailiang Liang, Shuo State Key Laboratory of Operation and Control Renewable Energy Storage Systems China Electric Power Research Institute Nanjing China

ISBN: (纸本)9781728135205

The power supply structure has been changed greatly, and the available rapid frequency response resources of the grid have reduced gradually, with the grid-connecting of large-capacity and high proportion of new energy sources. Meanwhile, the external transmission scale of large-scale new energy bases through UHV DC is continuously expanded. A serious threat to grid frequency security will be posed by high power UHV DC blocking. The frequency regulation pressure and safe operation risk of the power grid are increasing. The participation of new energy for the rapid frequency response of the power grid is urgent, in order to improve the frequency risk prevention and control level of the large power grid. The rapid frequency response performance requirements of new energy power stations were introduced, and a typical scheme of rapid frequency response was proposed for existing or newly built wind farms and photovoltaic power stations. A new energy power station integrated control system was developed and a demonstration application was carried out in a photovoltaic power station. The integration function of AGC/AVC and rapid frequency response for new energy power station was realized, which achieved the purpose of active support for power grid frequency and voltage by new energy power station. © 2019 IEEE.

关键词： Frequency response

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Accommodation Ability Evaluation of High Renewable Energy Penetrated power System with Large-scale Concentrating Solar power 6

Accommodation Ability Evaluation of High Renewable Energy Pe...

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6th Asia Conference on power and Electrical Engineering, ACPEE 2021

作者： Li, Pai Li, Qing Bai, Jie Wang, Shuai Huang, Yuehui China Electric Power Research Institute State Key Laboratory of Operation and Control of Renewable Energy Storage Systems Beijing China

ISBN: (纸本)9781728191591

In this paper, a method on evaluation of annual accommodation ability of high renewable energy penetrated power system with concentrating solar power (CSP) is proposed based on sequential production simulation technology. Firstly, an aggregated CSP operation model is established and a long-term unit commitment model is then formulated with considering the constraints of system balance, system reserve, transmission line limitation and operations of wind power, photovoltaic (PV) power, CSP, thermal power and hydro power. Secondly, the hourly power series of renewable energy is incorporated as inputs for maximizing utilization of annual power generation of wind, PV and CSP. Thirdly, a sequential decomposition algorithm is adopted to solve the long-term optimization model. Finally, the proposed method is tested on a high renewable energy penetrated power system with large-scale CSP and the testing results validate the effectiveness and applicability of the proposed method. © 2021 IEEE.

关键词： Solar energy

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Study on the thermal-electrical balance of the kW-class SOFC stack 17

Study on the thermal-electrical balance of the kW-class SOFC...

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17th International Symposium on Solid Oxide Fuel Cells, SOFC 2021

作者： Li, Biao Lyu, Zewei Han, Minfang Sun, Kaihua Sun, Zaihong Liu, Yang Department of Energy and Power Engineering State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Tsinghua University Beijing100084 China Xuzhou Huatsing Jingkun Energy Co. Ltd. Jiangsu Province 221004 China

ISBN: (纸本)9781607685395

Heat and electricity are deeply coupled in solid oxide fuel cell (SOFC) stacks, and the balance and control between them are vital to the steady working condition and outputs. Therefore, studying the balance mechanism of heat and electricity is important to achieve the safe and stable operation of the SOFC stacks. In this paper, a semi-empirical simulation model of a kilowatt-level SOFC stack was established. Based on this model, the effects of different operating temperatures, flow rates, air to H2 ratios (AHR), and steam to carbon (S/C) ratios on the thermoelectric balance state of the SOFC stack were analyzed. Results show that the I-V curve can be separated into three parts: unbalance zone, unsustainable zone, and the self-heat balance zone by the self-heat balance voltage (SHBV) and the critical voltage (CV). The approximate voltage scope of the balance zone under different conditions is 0.6~0.9 V. © 2021 Electrochemical Society Inc.. All rights reserved.

关键词： Specific heat

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power control performance evaluation of wind turbine based on a hardware-in-the-loop simulation platform 8

Power control performance evaluation of wind turbine based o...

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8th Renewable power Generation Conference, RPG 2019

作者： Miao, Fenglin Li, Qing He, Jing Zhang, Jinping State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Beijing China

ISBN: (纸本)9781839531255

power control performance evaluation of wind turbine can offer an important guarantee for reliable operation of power grid. Modelling is a general method to study the power control strategy. However, the power control performance of wind turbine is evaluated based on field test at present, because accurate results of power control test are not easy to be obtained by simulation. Combined simulation method in off-line simulation has been used with the consideration of coupling effect of electrical and mechanical components, but the dynamical behaviour in a long period of time cannot be investigated because of the low efficiency of solver. In the electromagnetic transient research of power electronics, real-time simulation is suggested with high efficiency. In this paper, a hardware-in-the-loop (HIL) simulation method for the power-control capability evaluation of wind turbine is proposed. Physical controllers in the HIL include main controller and converter controller. Multi-time step of detailed model simulation was realized by different types of interface based on real-time simulators. Additionally, an experiment on power control of wind turbine was carried out. It is a convenient and time-saving way to evaluate the power control performance of wind turbine in the HIL simulation platform. © 2019 Institution of Engineering and Technology. All rights reserved.

关键词： Hardware-in-the-loop simulation

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An Open-circuit Fault Diagnosis Method for power Switching Devices of DC Charging Piles of Electric Vehicles Based on Model Predictive control Strategy 6

An Open-circuit Fault Diagnosis Method for Power Switching D...

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6th International Conference on Energy, Electrical and power Engineering, CEEPE 2023

作者： Li, Hongtao Ding, Mingchang Dong, Yinghua Li, Yuan Zhao, Chao Zhang, Shuangqing China Electric Power Research Institute State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems Nanjing China

ISBN: (纸本)9798350348279

Aiming at the open circuit fault of power switching devices which is common in the DC charging pile of electric vehicles, a real-time fault diagnosis method of electric vehicle charging pile based on model predictive control is proposed in this paper. The model predictive current control method is adopted to replace the PI controller in the current loop of the traditional PWM rectifier. On this basis, the switch state of the rectifier applied under the open circuit fault of the power switching devices is compared with the optimal switch state obtained by model predictive control, and the fault feature signal is established to realize the fault diagnosis and positioning of the charging pile power switching devices. Since the fault feature signals of different power switching devices have no influence on each other, this method has significant effect on single tube, double tube, and multiple tube simultaneously fault. The simulation results verify the correctness and effectiveness of the proposed fault diagnosis method for charging piles. © 2023 IEEE.

关键词： Failure analysis

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Implications of COVID-19 for the Electricity Industry: A Comprehensive Review

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CSEE Journal of power and Energy systems 2020年第3期6卷 489-495页

作者： Haiwang Zhong Zhenfei Tan Yiliu He Le Xie Chongqing Kang Department of Electrical Engineering the State Key Lab of Control and Simulation of Power Systems and Generation EquipmentInstitute for National Governance and Global GovernanceTsinghua UniversityBeijing 100084China Department of Electrical and Computer Engineering Texas A&M UniversityCollege StationTX 77843 USA

As COVID-19 sweeps through the whole world,human activities have been changed *** such circumstances,the electricity sector is deeply affected and faced with great *** paper provides a comprehensive review of the impacts that the pandemic has caused on the electricity *** demand has dropped sharply as governments around the world executed lockdown restrictions,while the load composition and daily load profile have also *** share of renewable generation has increased against the decline of the total electricity *** power balance situation and increased uncertainty of demand have posed higher pressure on system operators,along with voltage violation issue and challenges for system maintenance and *** electricity market is also substantially influenced,while longterm investment in clean energy is expected to be *** externality such as emission reduction is also discussed.

关键词： COVID-19 electricity industry energy market pandemic power system

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On dispatching power systems with significant wind generation using disturbance feedbacks

On dispatching power systems with significant wind generatio...

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Chinese control Conference (CCC)

作者： Wei Wei Shengwei Mei Feng Liu State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Tsinghua University Beijing China State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Tsinghua University Beijing Beijing CN

With the rapid development of renewable energies, especially wind power, how to manage unexpected generation variations economically and reliably in dispatch has become crucial for modern power systems. To address this issue, this paper presents an affine disturbance feedback robust dispatch (ADF-RD) methodology for power systems with large scale wind power integration in the framework of adjustable robust optimization (ARO). This methodology divides the dispatching process into pre-dispatch and re-dispatch. Pre-dispatch decision immunizes against all possible realizations of uncertainties in a set, while re-dispatch which can be regarded as a feedback will be adaptively adjusted using an affine function with respect to the realized uncertainty in real time. The ADF-RD methodology is applied to an hourly ahead dispatch (HAD) problem. The effectiveness and efficiency of the proposed ADF-RD methodology are demonstrated by numerical experiments carried on a five-bus system.

关键词： Uncertainty Wind power generation Wind forecasting Wind farms Load flow power transmission lines

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A Multi-type Energy Storage control Strategy for Promoting Renewable Energy Consumption and Active-Support Ability 6

A Multi-type Energy Storage Control Strategy for Promoting R...

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6th IEEE Conference on Energy Internet and Energy System Integration, EI2 2022

作者： Ma, Huimeng Wu, Rongyu Li, Xiangjun China Electric Power Research Institute State Key Laboratory of Control and Operation of Renewable Energy and Storage Systems Beijing China

ISBN: (纸本)9798350347159

The development of a new type of power system based on renewable energy will seriously degrade the system frequency characteristics and the level of safety and stability, which needs to be solved urgently. In order to promoting new energy consumption and active-support ability, this paper proposes a multi-type energy storage system(MTESS) control strategy based on frequency domain decomposition algorithm on the side of renewable energy power station (REPS), which can realize the multi-type energy storage system to efficiently meet the requirements of reducing the curtailment rate and compensating for the power prediction error, energy storage demand in the complex process of primary frequency modulation demand in random high frequency. Finally, the feasibility and superiority of this control method are proved by the analysis of practical examples. © 2022 IEEE.

关键词： Energy storage

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