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高比例电力电子电力系统过电压(二):交流对称故障下暂时工频过电压机理

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中国电机工程学报 2024年第5期44卷 1701-1711,I0003页

作者：徐式蕴孙华东王姝彦王晶毕经天中国电力科学研究院有限公司北京市海淀区100192 国家电力调度控制中心北京市西城区100052

随着新能源等电力电子设备占比的不断提升,故障扰动后引发的系统暂时工频过电压问题日渐凸显,严重时易引发新能源大规模脱网,威胁电网安全稳定运行。新能源发电设备的故障穿越特性直接影响过电压水平,亟需进行机理分析。该文首先分析交... 详细信息

随着新能源等电力电子设备占比的不断提升,故障扰动后引发的系统暂时工频过电压问题日渐凸显,严重时易引发新能源大规模脱网,威胁电网安全稳定运行。新能源发电设备的故障穿越特性直接影响过电压水平,亟需进行机理分析。该文首先分析交流对称故障下高比例电力电子电力系统过电压的引发原因,建立计及新能源故障穿越特性的过电压简化分析模型,并基于矢量关系解析三相短路故障后新能源机端过电压最大值;然后分析不同故障穿越策略和系统参数对新能源机端电压最大值的影响;提出防止新能源大规模脱网的故障穿越等效无功电流系数的取值区间,进一步综合考虑新能源故障期间的无功支撑要求和故障清除后的电压安全约束,分析不同系统强度下等效无功电流系数的合理取值区间;最后通过时域仿真验证理论分析的有效性。

关键词：高比例电力电子电力系统暂时工频过电压机理分析低电压穿越控制

国外新能源脱网事故对中国电网安全稳定运行的启示

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电力系统自动化 2024年第13期48卷 1-8页

作者：徐式蕴王一鸣孙华东毕经天兰天楷中国电力科学研究院有限公司北京市100192

2016至2023年间,美国、英国和澳大利亚发生了11起新能源大规模脱网事故,严重威胁电网安全稳定运行。文中介绍了这些事故的基本情况,总结分析了事故失稳过程和机理特征,并指出系统强度不足、新能源控制策略不合理、非预想故障防控手段不... 详细信息

2016至2023年间,美国、英国和澳大利亚发生了11起新能源大规模脱网事故,严重威胁电网安全稳定运行。文中介绍了这些事故的基本情况,总结分析了事故失稳过程和机理特征,并指出系统强度不足、新能源控制策略不合理、非预想故障防控手段不足是事故产生的主要原因。最后,结合中国电网实际,提出了保障新型电力系统安全稳定运行的建议。

关键词：电力系统安全稳定新能源脱网系统强度故障穿越策略新能源控制保护

Mode-based Damping Torque Analysis in Power System Low-frequency Oscillations

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CSEE Journal of Power and Energy Systems 2023年第4期9卷 1337-1347页

作者： jingtian bi Huadong Sun Shiyun Xu Ruihua Song bing Zhao Qiang Guo the State Key Laboratory of Power Grid Safety and Energy Conservation China Electric Power Research InstituteBeijing 100192China

The mode-based damping torque analysis(M-DTA)method for studying the effect of an external controller on power system low-frequency oscillations is proposed in this ***,based on the interconnection model between the system and the controller in the frequency domain,the oscillation loop corresponding to the electromechanical oscillation mode is built,and then the mode-based damping torque of the controller can be ***,the application of the M-DTA method in the power system is *** derivation shows that in the single-machine infinite-bus power system,the M-DTA method is completely equivalent to the classical damping torque analysis(C-DTA)*** the multi-machine power system,the mode-based damping torque directily reflects the effect of the controller on the oscillation mode,overcoming the shortcomings of the C-DTA method in which there is no direct correspondence between the damping torque and the oscillation *** deriving the relationship with the residue index,the M-DTA method shows higher accuracy than the residue method in applications,such as controller parameter ***,two example power systems are presented to demonstrate the application of the proposed M-DTA *** Terms-Electromechanical oscillation mode,FACTS,interconnection model in the frequency domain,mode-based damping torque analysis(M-DTA),power system low-frequency oscillation,PSS,residue method.

关键词： Electromechanical oscillation mode FACTS interconnection model in the frequency domain mode-based damping torque analysis(M-DTA) power system low-frequency oscillation PSS residue method.

Small-signal Angular Stability of Power System as Affected by Grid-connected Variable Speed Wind Generators—A Survey of Recent Representative Works

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CSEE Journal of Power and Energy Systems 2017年第3期3卷 223-231页

作者： Wenjuan Du jingtian bi H.F.Wang State Key Laboratory of Alternate Electric Power Systems(SKLAEPS)with New Energy Resources North China Electric Power UniversityBeijing 102206China

This paper reviews the status and progress of the investigation on power system small-signal angular stability as affected by grid-connected variable speed wind generators(VSWGs).The review is carried out on the basis of a survey of recently published representative *** of the investigation made in those selected papers are classified into two groups:1)VSWGs displacing synchronous generators(SGs);2)VSWGs simply being added in a power *** diversification of the results of the investigation is highlighted in the *** analysis on two strategies of the investigation is conducted in this *** is revealed that in the strategy of VSWGs displacing SGs,there are two factors which could affect power system small-signal angular stability differently:1)Withdrawing the SGs’dynamics;2)adding the VSWGs’*** the strategy of adding VSWGs in the power system,there are also two affecting factors:1)Change of load flow brought about by the VSWGs;2)dynamic interactions with the SGs introduced by the *** diversified results of the investigation obtained so far are not only due to the dependence of the investigation on sample power systems used,but also caused by the mixture of different affecting *** paper is concluded with a summary of key issues of the investigation for future work.

关键词： Electromechanical oscillation modes power system dynamics power system low-frequency oscillation power system small-signal angular stability synchronous generators(SGs) variable speed wind generators(VSWGs)

Impact of Grid Connection of Large-Scale Wind Farms on Power System Small-Signal Angular Stability

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CSEE Journal of Power and Energy Systems 2015年第2期1卷 83-89页

作者： Wenjuan Du jingtian bi Tong Wang Haifeng Wang State Key Laboratory of Alternate Electric Power Systems(SKLAEPS)with New Energy Resources North China Electric Power UniversityChangping DistrictBeijing102206China

The grid connection of a large-scale wind farm could change the load flow/configuration of a power system and introduce dynamic interactions with the synchronous generators(SGs),thus affecting system small-signal angular *** paper proposes an approach for the separate examination of the impact of those affecting factors,i.e.,the change of load flow/configuration and dynamic interactions brought about by the grid connection of the wind farm,on power system smallsignal angular *** cases of grid connection of the wind farm,either displacing synchronous generators or being directly added into the power system,are *** using the proposed approach,how much the effect of the change of load flow/configuration brought about by the wind farm can be examined,while the degree of impact of the dynamic interaction of the wind farm with the SGs can be investigated ***,a clearer picture and better understanding of the power system small-signal angular stability as affected by grid connection of the large-scale wind farm can be *** example of the power system with grid connection of a wind farm is presented to demonstrate the proposed approach.

关键词： Double fed induction generator(DFIG) electromechanical oscillation modes power system low-frequency oscillations power system small-signal angular stability wind farms

Research on Storage Capacity of Compressed Air Pumped Hydro Energy Storage Equipment

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Energy and Power Engineering 2013年第4期5卷 26-30页

作者： jingtian bi Tong Jiang Weili Chen Xian Ma State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing China

Compressed air pumped hydro energy storage equipment combines compressed air energy storage technology and pumped storage technology. The water is pumped to a vessel to compress air for energy storage, and the compressed air expanses pushing water to drive the hydro turbine for power generation. The novel storage equipment saves natural gas resources, reduces carbon emission, and improves the controllability and reliability. The principle of compressed air pumped hydro energy storage is introduced and its mathematical model is built. The storage and generation process of the novel equipment is analyzed using the model. The calculation formula of the storage power is deduced in theory in different situations of isothermal and adiabatic compression. The optimal storage scheme is given when the capacity and withstand pressure of the vessel is definitive, and the max available capacity and the equipment utilization efficiency evaluation of the scheme is given.

关键词： Power Storage Compressed Air Energy Storage Hydraulic Equipment Optimal Operation Isothermal Process Adiabatic Process Equipment Utilization Efficiency

Research on New Compressed Air Energy Storage Technology

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Energy and Power Engineering 2013年第4期5卷 22-25页

作者： Xian Ma jingtian bi Weili Chen Zhisen Li Tong Jiang State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing China Tai’an Power Supply Company Shandong Electric Power Corporation

In recent years, wind power generation and photovoltaic power generation have been developing rapidly, and the installed capacity of the new resources generation has been keeping a fast growth every year. But with the incorporation into the grid, the new resources generation that has the properties such as randomness and volatility causes certain risks to the power grid, which results in the falling of the incorporation proportion instead of rising. This paper describes the current status and development problems of the new energy in China, and gives a brief introduction of characteristics of various energy storage technologies. This paper focuses on the analysis of the compressed air energy storage technology in recent years and new developments and the latest technology at home and abroad, additionally, the paper introduces a new concept of the compressed air energy storage system.

关键词： New Energy Wind Power Power Storage Technology Compressed Air Energy Storage

Economic Benefit Analysis of 220 kV Energy-saving Power Transformer

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Energy and Power Engineering 2013年第4期5卷 1303-1307页

作者： Weili Chen Xian Ma jingtian bi Zhisen Li Tong Jiang State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing China Tai’an Power Supply Company Shandong Electric Power Corporation

Power transformer serves as one of the most widely used electrical equipments in power grid. During the operation, terrible losses are produced. With the development of loss reduction technology of power transformers, in order to save energy saving and reduce emissions, the old power transformer should be replaced. The paper summarizes the main method to reduce the losses of power transformers and brings up the improved Total Owning Cost (TOC) algorithm, which applies to 220 kV power transformers’ comprehensive benefit analysis. Using the improved Total Owning Cost (TOC) algorithm, based on today 220 kV energy-saving power transformer manufacturing level, the economic benefits of new energy-saving power transformer and the return period of investment are analyzed. Finally, combined with energy-saving effect, the appropriate replacement proposal of 220 kV power transformers has been given.

关键词： 220 kV Power Transformer Loss Reduction Technology of Transformer TOC Algorithm Economic Analysis

含直驱风电机组的电力系统次同步振荡鲁棒阻尼控制

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电力系统自动化 2020年第3期44卷 56-65页

作者：杨京王彤毕经天李琰中国电力科学研究院有限公司北京市100192 新能源电力系统国家重点实验室(华北电力大学) 北京市102206

风电功率波动会导致电力系统运行点变化,为有效提高次同步振荡阻尼控制的适应性,文中采用直驱风电机组附加控制的方法设计了一种次同步振荡鲁棒阻尼控制器。首先,基于状态空间模型利用含区域极点配置的混合H 2/H∞控制方法抑制由随机扰... 详细信息

风电功率波动会导致电力系统运行点变化,为有效提高次同步振荡阻尼控制的适应性,文中采用直驱风电机组附加控制的方法设计了一种次同步振荡鲁棒阻尼控制器。首先,基于状态空间模型利用含区域极点配置的混合H 2/H∞控制方法抑制由随机扰动引起的电力系统次同步振荡。将不同运行点作为凸多面体的顶点构建凸多面体模型,以适应风电输出波动引起的系统运行点大范围变化,提高控制器的鲁棒性。然后,利用线性矩阵不等式求解状态反馈矩阵,设计次同步振荡鲁棒阻尼控制器。最后,利用接入2台直驱风电机组的4机2区系统作为测试系统进行时域仿真。仿真结果表明,基于凸多面体的鲁棒阻尼控制器不仅能够为系统次同步振荡模式提供足够的阻尼,并且在风电功率在较大范围内变化的情况下,控制器也具有较好的控制效果。

关键词：次同步振荡混合H 2/H∞控制鲁棒控制凸多面体模型直驱风电机组