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Control and Stability of Large-scale Power System with Highly Distributed renewable energy generation:Viewpoints from Six Aspects

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CSEE Journal of Power and energy Systems 2023年第1期9卷 8-14页

作者： Qing-Hua Wu Anjan Bose Chanan Singh Joe H.Chow Gang Mu Yuanzhang Sun Zhaoxi Liu Zhigang Li Yang Liu School of Electric Power Engineering South China University of TechnologyGuangzhou 510640China School of Electrical Engineering&Computer Science Washington State UniversityPullmanWA 99164USA Department of Electrical and Computer Engineering Texas A&M UniversityCollege StationTX 77843USA Department of Electrical Computer and Systems EngineeringRensselaer Polytechnic Institute(RPI)TroyNYUSA Key Laboratory of Modern Power System Simulation and Control&renewable energy Technology Ministry of Education(Northeast Electric Power University)Jilin 132012China School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072China

Power systems are moving toward a low-carbon or carbon-neutral future where high penetration of renewables is *** conventional fossil-fueled synchronous generators in the transmission network being replaced by renewable energy generation which is highly distributed across the entire grid,new challenges are emerging to the control and stability of large-scale power *** analysis and control methods are needed for power systems to cope with the ongoing *** the CSEE JPES forum,six leading experts were invited to deliver keynote speeches,and the participating researchers and professionals had extensive exchanges and discussions on the control and stability of power ***,potential changes and challenges of power systems with high penetration of renewable energy generation were introduced and explained,and advanced control methods were proposed and analyzed for the transient stability enhancement of power grids.

关键词： Distributed energy resources high converter penetration power system control renewable energy generation stability control transient stability

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Research on Equivalent Modeling Method of AC-DC Power Networks Integrating with renewable energy generation

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energy Engineering 2023年第11期120卷 2469-2487页

作者： Weigang Jin Lei Chen Yifei Li Shencong Zheng Yuqi Jiang Hongkun Chen Central China Branch of State Grid Corporation of China Wuhan430077China School of Electrical Engineering and Automation Wuhan UniversityWuhan430072China

Along with the increasing integration of renewable energy generation in AC-DC power networks,investigating the dynamic behaviors of this complex system with a proper equivalent model is *** paper presents an equivalent modeling method for the AC-DC power networks with doubly-fed induction generator(DFIG)based wind farms to decrease the simulation scale and computational *** the AC-DC power networks,the equivalent modeling strategy in accordance with the physical structure simplification is *** the DFIG-based wind farms,the equivalent modeling based on the sequential identification of multi-machine parameters using the improved chaotic cuckoo search algorithm(ICCSA)is *** light of the MATLAB simulation platform,a two-zone four-DC interconnected power grid with wind farms is built to check the efficacy of the proposed *** simulation analyses and comparative validation in different algorithms and cases,the proposed method can precisely reflect the steady and dynamic performance of the demonstrated system under N-1 and N-2 fault scenarios,and it can efficiently achieve the parameter identification of the wind farms and fulfill the equivalent ***,the proposed approach’s effectiveness and suitability are confirmed.

关键词： Equivalent modeling AC-DC power networks renewable energy generation wind farm improved chaotic cuckoo search algorithm

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Switched-capacitor Based Seven-level Boost Inverter with a Reduced Number of Devices

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CSEE Journal of Power and energy Systems 2024年第1期10卷 381-391页

作者： Weijie Lin Jun Zeng Bo Fu Zhixing Yan Junfeng Liu School of Electric Power Engineering South China University of TechnologyGuangzhou 510641China WISDRI Engineering&Research Incorporation Limited Wuhan 430074China Department of energy Aalborg UniversityAalborg 9220Denmark School of Automation Science and Engineering South China University of TechnologyGuangzhou 510641China

The conventional multilevel inverters(MLIs)have the disadvantages of numerous devices,incapacity of boost,unbalance for capacitor’s voltage,high complexity for control,and *** by this issue,a seven-level boost inverter(7LBI)based on a switched capacitor is presented for singlephase applications in this *** proposed 7LBI using only seven transistors can achieve seven output levels,1.5 voltage gain,and natural balance of capacitors’voltages without sensors or other auxiliary methods,which illustrates its suitability for the applications of renewable energy *** configuration of topology and operating principles are illustrated in *** natural balance of capacitors and capacitance calculations are deduced as ***,the comparative study is conducted for different types of *** results illustrate the merits of the proposed 7LBI with respect to reduced devices,lower voltage stress,and less power ***,a simulation for the proposed 7LBI with PWM modulation is realized based on the theoretical analysis;an experimental prototype is also implemented,verifying multilevel output,boost ability,natural balance for switched capacitors,and performance of transient response.

关键词： Multilevel inverters voltage gain natural balance renewable energy generation reduced number of elements

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Large-Scale renewable energy Transmission by HVDC: Challenges and Proposals

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Engineering 2022年第12期19卷 252-267页

作者： Weisheng Wang Guanghui Li Jianbo Guo State Key Laboratory of the Operation and Control of renewable energy and Storage Systems China Electric Power Research InstituteBeijing 100192China

renewable energy transmission by high-voltage direct current(HVDC)has attracted increasing attention for the development and utilization of large-scale renewable energy under the Carbon Peak and Carbon Neutrality Strategy in ***-penetration power electronic systems(HPPESs)have gradually formed at the sending end of HVDC *** operation of such systems has undergone profound changes compared with traditional power systems dominated by synchronous *** stability issues,such as broadband oscillation and transient over-voltage,have emerged,causing tripping accidents in large-scale renewable energy *** analysis methods and design principles of traditional power systems are no longer suitable for *** this paper,the mechanisms of broadband oscillation and transient over-voltage are revealed,and analytical methods are proposed for HPPESs,including small-signal impedance analysis and electromagnetic transient *** of the theoretical research has been accomplished through its application in several practical projects in north,northwest,and northeast region of ***,suggestions for the construction and operation of the future renewable-energy-dominated power system are put forward.

关键词： Broadband oscillation Future power system HVDC transmission renewable energy generation Transient over-voltage

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Local energy and Planned Ramping Product Joint Market Based on a Distributed Optimization Method

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CSEE Journal of Power and energy Systems 2021年第6期7卷 1357-1368页

作者： Zhong Zhang Furong Li Sung-Won Park Sung-Yong Son Dalian University of Technology DalianChina Department of Electronic and Electrical Engineering University of BathBathU.K. the University of Bath BathU.K. the Department of Electrical and Electronic Engineering Youngsan UniversitySouth Korea Gachon University SeoulSouth Korea

High penetration of renewable energy generation(REG)in the distribution system increases both the power uncertainty at a given interval and the power variation between two *** markets addressing power uncertainty have been widely ***,there is a lack of market mechanisms regarding the power variation of the load and *** paper thus defines a planned ramping(PR)product to follow the net load variation and extends the local energy market to include the trading of PR *** are economically compensated for their PR *** models of dispatchable generators and flexible load aggregators in the joint market are *** solve the market problem in polynomial time,a distributed market clearing method is developed based on the ADMM *** joint market is tested on a modified IEEE 33-bus *** verifies that introducing the PR market can encourage flexible loads to provide more PR service to accommodate the net load *** such,the ramping cost of dispatchable generators is reduced by 29.09%in the test *** planned energy curtailment from REG is also *** computational efficiency of the proposed distributed clearing method is validated by comparing it with a centralized method.

关键词： Distributed market clearing flexible load aggregator local electricity market planned ramping product renewable energy generation

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An approach for evaluating the impact of an intermittent renewable energy source on transmission expansion planning

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Frontiers of Information Technology & Electronic Engineering 2015年第10期16卷 871-882页

作者： Rongrit CHATTHAWORN Surachai CHAITUSANEY Department of Electrical Engineering Chulalongkorn University

We propose a new robust optimization approach to evaluate the impact of an intermittent renewable energy source on transmission expansion planning （TEP）. The objective function of TEP is composed of the investment cost of the transmission line and the operating cost of conventional generators. A method to select suitable scenarios representing the intermittent renewable energy generation and loads is proposed to obtain robust expansion planning for all possible scenarios. A meta-heuristic algorithm called adaptive tabu search （ATS） is employed in the proposed TEE ATS iterates between the main problem, which minimizes the investment and operating costs, and the subproblem, which minimizes the cost of power generation from conventional generators and curtailments of renewable energy generation and loads. The subproblem is solved by nonlinear programming （NLP） based on an interior point method. Moreover, the impact of an intermittent renewable energy source on TEP was evaluated by comparing expansion planning with and without consideration of a renewable energy source. The IEEE Reliability Test System 79 （RTS 79） was used for testing the proposed method and evaluating the impact of an intermittent renewable energy source on TEP. The results show that the proposed robust optimization approach provides a more robust solution than other methods and that the impact of an intermittent renewable energy source on TEP should bc considered.

关键词： Adaptive tabu search renewable energy generation Robust optimization Transmission expansion planning

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Overview of energy Storage in renewable energy Power Fluctuation Mitigation

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CSEE Journal of Power and energy Systems 2020年第1期6卷 160-173页

作者： Yushu Sun Zhenxing Zhao Min Yang Dongqiang Jia Wei Pei Bin Xu Institute of Electrical Engineering Chinese Academy of SciencesHaidian DistrictBeijing 100190 University of Chinese Academy of Sciences Shijingshan DistrictBeijing 100049China North China Electric Power University BeijingChina Tianjin University TianjinChina State Grid Anhui Electric Power Company

The integration of renewable energy,such as PV and wind power,has exerted great impacts on the power system with its rapid *** the corresponding energy storage system is configured,the power system could be able to hold a higher proportion of renewable *** on energy storage application for the output fluctuation mitigation of renewable energy,this paper first analyses the reason for renewable energy power fluctuation mitigation from the four aspects of frequency,unit ramp,low frequency oscillation and cascading *** addition,the fluctuation rate standard of grid-connected renewable energy,the energy storage type and the mitigation topology are *** a summary and analysis on mitigation strategy and hybrid energy storage allocation strategy are ***,the demonstration application and development trend of energy storage are analyzed to provide reference for the promotion of energy storage in renewable energy.

关键词： Fluctuation mitigation hybrid energy storage renewable energy generation

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Real-time Dispatchable Region of renewable generation Constrained by Reactive Power and Voltage Profiles in AC Power Networks

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CSEE Journal of Power and energy Systems 2020年第3期6卷 528-536页

作者： Yanqi Liu Zhigang Li Q.H.Wu Haibo Zhang School of Electric Power Engineering South China University of TechnologyGuangzhou 510641China State Key Laboratory of Alternate Electrical Power System with renewable energy Sources North China Electric Power UniversityBeijing 102206China

A large amount of renewable energy generation(REG)has been integrated into power systems,challenging the operational security of power *** a real-time dispatch,system operators need to estimate the ability of the power network to accommodate REG with a limited reserve *** real-time dispatchable region(RTDR)is defined as the largest range of a power injection that the power network can accommodate in a certain dispatch interval for a given dispatch base ***-of-the-art research on the RTDR adopts a DC power flow model regardless of the voltage profiles and reactive power,which can overlook potentially insecure operational states of the *** address this issue,this paper proposes an AC power flow based RTDR model simultaneously considering the reactive power and voltage profiles *** nonlinear constraints in our model are approximated using a linear power flow model together with a polytope approximation technique for quadratic *** adaptive constraint generation algorithm is used to calculate the *** results using the IEEE 5-bus and 30-bus systems illustrate the advantages of the proposed model.

关键词： Dispatchable region linearization renewable energy generation reactive power

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