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Multi-objective partition planning for multi-infeed HVDC system

Global energy Interconnection 2021年第1期4卷 81-90页

作者： Zhao Yu Shuanbao Niu Chao Huo Ning Chen Kaige Song Xiaohui Wang Yu Bai State Grid Corporation of China Beijing100031P.R.China Northwest Branch State Grid Corporation of ChinaXi’an710048P.R.China National Key Laboratory of Operation and Control of Renewable Energy and Energy Storage China Electric Power Research Institute(Nanjing)Nanjing210003P.R.China Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong UniversityJinan250061P.R.China Langfang Power Supply Company State Grid Jibei Electric Power Company LimitedLangfang 065000P.R.China

The close proximity and the necessity of coordination between multiple high-voltage direct currents(HVDCs)raise the issue of grid partitioning in multi-infeed HVDC systems.A multi-objective partition strategy is proposed in this *** types of relationships to be coordinated and complemented are analyzed and formulated using quantitative *** to the graph theory,the HVDC partition is transformed into a graph-cut problem and solved via the spectral clustering ***,the proposed method is validated for a practical multi-HVDC grid,confirming its feasibility and effectiveness.

关键词： Multi-infeed HVDC system Grid partition Multi-objective planning Spectral clustering

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Overview of Mechanism and Mitigation Measures on Multi-frequency Oscillation Caused by Large-scale Integration of Wind Power

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CSEE Journal of Power and energy systems 2019年第4期5卷 433-443页

作者： Yongning Chi Bingjie Tang Jiabing Hu Xinshou Tian Haiyan Tang Yan Li Sujuan Sun Lei Shi Lei Shuai State Key Laboratory of Operation and Control of Renewable Energy&Storage Systems China Electric Power Research InstituteBeijing 100192China Huazhong University of Science and Technology Wuhan 430074China NARI Group Corporation Nanjing 211000China Siemens Gamesa Renewable Energy A/S Brande 7330Denmark

In recent years,the large-scale integration of re-newable energy sources represented by wind power and the widespread application of power electronic devices in power systems have led to the emergence of multi-frequency oscillation problems covering multiple frequency segments,which seriously threaten system stability and restrict the accommodation of renewable *** oscillation problems related to renewable energy integration have become one of the most popular topics in the field of wind power integration and power system stability *** has received extensive attention from both academia and industries with many promising research results achieved to *** paper first analyzes several typical multi-frequency oscillation events caused by large-scale wind power integration in domestic and foreign projects,then studies the multi-frequency oscillation problems,including wind turbine’s shafting torsional oscillation,sub/super-synchronous oscillation and high frequency *** state of the art is systematically summarized from the aspects of oscillation mechanism,analysis methods and mitigation measures,and the future research directions are explored.

关键词： High-frequency resonance multi-frequency oscillation sub-synchronous oscillation super-synchronous oscillation wind power integration

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Research on Power Collection and operation control Technology Requirements of Deep Water Wind Farm

Research on Power Collection and Operation Control Technolog...

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

作者： Ruanming Huang Mengyao Zhang Yongning Chi Ming Zhang Yan Li Xiaojie Fan Ting Huang Cong Wang Shanghai Electric Economic Research Institute State Grid Shanghai Electric Power Company Shanghai China China Electric Power Research Institute China State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems Beijing China Fujian Electric Power Research Institute State Grid Fujian Electric Power Company Fuzhou China

Analyzing the current global offshore wind power development and planning situation, offshore wind power development is gradually advancing from offshore to far-reaching waters. According to estimates, the wind energy resources that can be developed and utilized in my country's deep-sea area are about 1,000GW. However, on the one hand, the power characteristics of large-scale offshore wind farms, including the power collection characteristics of large-scale offshore wind farms, are currently lacking relevant research; on the other hand, floating wind turbine technology is still in its infancy, and the technology is immature. There are significant differences in the control technology and operating performance of floating fans. In view of the difference between large-scale deep-distance offshore wind farms and onshore and offshore wind power, this article aims to overcome the economic and reliable grid connection problem of deep-distance offshore wind farms, and puts forward the requirements for the development of large-scale deep-distance offshore power collection and operation control technology research. It is of practical significance to support the construction of deep-far offshore wind power projects in the near future, and it also provides technical reserves for my country's medium and long-term offshore wind power development.

关键词： Economics Technical requirements Wind energy Wind farms Wind power generation Power system stability Wind turbines

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Study on the Whole Life Cycle energy Management Method of energy storage System with Risk Correction control

Study on the Whole Life Cycle Energy Management Method of En...

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

作者： Ning Yan Shuai Li Tao Yan Shao hua Ma School of Electrical Engineering Shenyang University of Technology Shenyang China State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute

ISBN: (数字)9781728196060

ISBN: (纸本)9781728196077

With the rapid development of energy storage technology, more and more energy storage systems are connected to the large power grid. Therefore, how to improve the safety, reliability and stability of the grid-connected operation of energy storage power stations is the most important. Based on this background, this paper proposes the research on energy management and control methods of large-scale energy storage power station. First of all, the operating cost model of the energy storage system is established by comprehensively considering its life-cycle operation characteristics. Secondly, according to the spatial and temporal distribution characteristics of distributed power supply and load, the energy storage regulation technology based on dynamic safety margin is proposed. Finally, according to the set dynamic safety margin of energy storage system, the energy management method of energy storage power station based on risk correction control is proposed. An example is given to verify that the energy management method proposed in this paper has the following characteristics: it can effectively evaluate the system energy supply sufficiency and realize the accuracy of system regulation.

关键词： Power system dynamics Stability analysis Regulation Safety energy management Power generation energy storage

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Wide Frequency Range Suppression of Subsynchronous Oscillation for DFIG Wind Farm Based on Optimal control

Wide Frequency Range Suppression of Subsynchronous Oscillati...

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

作者： Xingyuan Li Peng Zhang Chenyang Han State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute Beijing China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing China

ISBN: (数字)9781728196060

ISBN: (纸本)9781728196077

The subsynchronous oscillation of wind turbines is affected by many factors in the working environment and conditions and the oscillation frequency has the characteristic of broadband oscillation, which puts forward new requirements for the design of suppressing the oscillation. This paper designs a suppression method of wide frequency range for subsynchronous oscillation of doubly-fed induction generator(DFIG) wind farm based on optimal control. First, the small signal linearized model of the DFIG is established in this paper. Then based on the quadratic index in the optimal control theory, the optimal time control theory is used to determine the weight coefficient of the control variables and the state variables of the quadratic index, then the optimal feedback controller is designed. Finally the simulation shows that the feedback controller designed in this paper has a good suppression effect on the broadband subsynchronous oscillation generated by the DFIG under complicated working conditions. For a more complicated multi-machine system, the controller also has a significant suppression effect on the subsynchronous oscillation.

关键词： Doubly fed induction generators Optimal control Broadband communication Indexes Adaptive control Oscillators Frequency control

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Comparison and Analysis of Parameter Setting Methods of Doubly Fed Induction Generation controller Based on Integrated Inertia control

Comparison and Analysis of Parameter Setting Methods of Doub...

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IEEE PES Asia-Pacific Power and energy Engineering Conference (APPEEC)

作者： Jieyao Ling Linjun Shi Feng Wu Guanghui Hua Weiguo He College of Energy and Electrical Engineering Hohai University Nanjing China State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute Nanjing China

ISBN: (数字)9781728157481

ISBN: (纸本)9781728157498

In order to solve the problem of grid frequency with large-scale wind power, this paper studies the frequency response capability of grid connected Doubly fed Induction Generation(DFIG).At first, the mathematical model of doubly fed wind turbine is established; Secondly, the integrated inertia control strategy based on virtual inertia control and primary frequency modulation is proposed; Then the parameters of the controller are adjusted by the theoretical calculation of the simulated synchronous generator and particle swarm optimization algorithm, and compared and analyzed;Finally, the simulation model of grid connection of DFIG based on virtual synchronous generator is built on MATLAB / Simulink platform to verify the effectiveness of its participation in grid frequency modulation. The frequency modulation ability of different control parameter setting methods is compared, and the influence degree of different controller parameters on power grid frequency is simulated and analyzed.

关键词：

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Study on voltage segment control strategy of large-scale renewable power base based on hierarchical-partitioned principle 8

Study on voltage segment control strategy of large-scale ren...

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8th renewable Power Generation Conference, RPG 2019

作者： Liu, Chao Su, Yuanyuan Li, Xi Liu, Hongzhi Li, Yan Li, Qing State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute No.15 Xiaoying East Road Qinghe Beijing China

ISBN: (纸本)9781839531255

Large-scale renewable power base collection system topology is complex. According to a single constant voltage control, prone to result in reactive power oscillation between different reactive power compensation equipments as some output and the others absorb. In this paper, based on hierarchical-partitioned principle, the renewable power base is divided into two reactive power and voltage control area: collection stations and renewable power station. Construct a reactive loss function with impedance and active power as variables, and characterize the trajectory of reactive loss with impedance and active power. The reactive power flow between two control areas and the allowable operating range of the bus voltage are restrained. The voltage of the collection station bus and the point of connection of renewable power station is taken as the control object. A voltage segment control strategy tracking renewable power output based on electrical topological impedance is proposed, to achieve reactive power voltage coordination control and improve reactive power voltage stability margin of the renewable power base. The simulation results of a renewable power base in the Three-North region of China verify effectiveness of the proposed strategy. © 2019 Institution of Engineering and Technology. All rights reserved.

关键词： Reactive power

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Robust dispatch of integrated electric-heat systems considering weather-parameter-driven residential thermal demands 4

Robust dispatch of integrated electric-heat systems consider...

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4th IEEE Conference on energy Internet and energy System Integration, EI2 2020

作者： Hua, Guanghui Li, Chen Zhang, Yong Li, Dan Liu, Chuang Wang, Cheng China Electric Power Research Institut State Key Laboratory of Operation and Control of Renewable Energy Storage Systems Nanjing China National Power Dispatching and Control Center Bejing China State Grid Hebei Electric Power Co.LTD. Shijiazhuang China State Grid DC Engineering Construction Company Bejing China North China Electric Power University School of Electrical and Electronic Engineering Bejing China

ISBN: (纸本)9781728196060

Conventional day-ahead scheduling strategies of integrated electricity and heating system (IEHS) are oversimplified for the thermal demand modeling and cannot meet the thermal comfort of the users. Furthermore, this unbalanced power may lead to reserve capacity deficiency in the power system, due to the thermal-electric coupling of the combined heat and power (CHP) units in IEHS. This paper derives a tractable and accurate residential thermal demand (RTD) model, which comprehensively considers the impact of weather conditions. Then, a robust scheduling strategy is employed to tackle the uncertainties of the renewable generation outputs and RTDs, suggesting a double-stage optimization model. The first stage is to identify the unit commitment with minimum operational cost. In the second stage, the feasibility of the first stage unit commitment would be checked to minimize the summation of slack variables. Besides, the robust optimization model is converted into a mixed-integer linear program via the big-M method and solved by column and constraint generation (C CG) algorithm. The simulation results show the effectiveness of the proposed RTD model, as well as the robust scheduling strategy for IEHS. © 2020 IEEE.

关键词： Scheduling

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Capacity Optimization and Economic Evaluation of Battery energy storage System for Qinghai Province based on Time Series Simulation Technology

Capacity Optimization and Economic Evaluation of Battery Ene...

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

作者： Ling Dong Zhencheng Sang Pai Li Qing Li Jian Li Chunlian Cao State Grid Qinghai Electric Power Company QingHai China State Key Laboratory of Operation and Control of Renewable Energy Storage Systems China Electric Power Research Institute Beijing China

ISBN: (数字)9781728196060

ISBN: (纸本)9781728196077

With the rapid development of renewable energy power in Qinghai province, the utilization rate of renewable energy has become to a new challenge. Large-scale battery energy storage system (BESS) is an effective way to promote the utilization of renewable energy. In this paper, a method on capacity optimization and economic evaluation of BESS is proposed based on sequential production simulation technology. An optimization model is established to maximize the utilization of renewable energy, considering constraints of system power balance, operation mode of BESS and conventional units. The annual power outputs of renewable energy are incorporated as inputs for optimizing the hourly charging and discharging power of BESS. The discount cash flow method is adopted to evaluate the economic benefits of BESS. In case studies, a set of scenarios for Qinghai province with different power rating and energy capacity of BESS are tested, and the best plans of BESS in Qinghai province is obtained. The testing results verify the effectiveness of the proposed method.

关键词： Economics renewable energy sources Flow production systems Power system dynamics Power grids Capacity planning Testing

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Research on Fast Frequency Response Technology and Device Development of Photovoltaic Power Station

Research on Fast Frequency Response Technology and Device De...

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

作者： Xiaodi Qin Xiaolin Zhang Xiaowei Ma Haichao Xu State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute Beijing China Northwest Branch of State Grid Corporation of China Xi’an China

ISBN: (数字)9781728196060

ISBN: (纸本)9781728196077

Traditional photovoltaic power plant doesn't participate in grid frequency regulation, as the increasing proportion of photovoltaic power in the whole power system, it may have a great impact on the frequency stability. The new standard DL/T 1870-2018 "Technical Specification for Power System Network Source Coordination" issued in 2018 puts forward the requirements for fast frequency response performance of photovoltaic power plant. At some regions with high proportion of photovoltaic power in Northwest China, relevant departments have released documents successively, which claim the photovoltaic power plant should have the ability of fast frequency response. In this paper, according to the requirements of standard and local documents, the key technical indexes of fast frequency response of photovoltaic power plant are analyzed. Several typical schemes of fast frequency response renovation of photovoltaic power plant are listed. A high precision fast frequency response device is developed, the principle and control strategy of the device are introduced, this device is used in laboratory and photovoltaic power plant respectively. As shown in the field test, the fast frequency response performance of photovoltaic power plant is much better with this device, both the frequency regulation response time and power control accuracy are much better than conventional hydro-thermal power plant, this device has a high application value.

关键词： Photovoltaic systems Power system stability Frequency response Power generation Frequency control Thermal stability Standards

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