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检索条件"机构=State Key Laboratory of Intelligent Power Grid Protection and Operation Control"

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Reliability analysis of autonomous controllable protection device in power system 8

Reliability analysis of autonomous controllable protection d...

引用

8th International Conference on power Electronics Systems and Applications, PESA 2020

作者： Li, Chen. Yutao, Qiu. Jianing, Chen. Xuliang, Huang. State Key Laboratory of Smart Grid Protection and Control China Co. Ltd Nanjing China State Grid Zhe Jiang Electric Power Co .LTD. China State Grid Zhejiang Electric Power Company Hangzhou Power Supply Company China

ISBN: (纸本)9781728193823

With the deepening of the concept of autonomous control in the power system, more and more attention is paid to the stability of the protection device itself. Compared with the primary equipment condition monitoring, the fault of the secondary protection device will be more concealed. This paper analyzes the factors affecting the reliability of protection devices, forms the life cycle prediction method of substation protection devices, and ensures the safe and stable operation of intelligent substation. Analyzed the reliability of the relay protection device related concepts, from the failure mechanism, through the establishment of joint aging failure based on the Arrhenius model and Weibull distribution model, and based on grid relay protection device, the data is using LM method for joint failure rate estimate the parameters of the model, get old equipment failure rate model of concrete, to determine the reliability of the protection device and the effective service life. An example shows that the model proposed in this paper can effectively predict the failure trend and life boundary of the device, and provide a theoretical basis for the daily maintenance of smart substation. © 2020 IEEE.

关键词： Weibull distribution

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A Novel Non-unit Frequency-Based Line protection Scheme for Flexible DC grids

A Novel Non-unit Frequency-Based Line Protection Scheme for ...

引用

2020 IEEE/IAS Industrial and Commercial power System Asia, I and CPS Asia 2020

作者： Zhang, Yunqi Cong, Wei Zhang, Yuxi Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Jinan China State Grid Liangshan Power Supply Company Liangshan China

ISBN: (纸本)9781728143033

To address the problems still existing in line protection for flexible DC grids currently, this paper proposes a non-unit frequency-based line protection scheme for flexible DC grids. Firstly, the values of the initial voltage traveling waves (IVTWs) generated by the fault point under internal and external faults are respectively calculated based on the equivalent model of the four-terminal flexible DC grid. Due to the boundary effect of the current limiting inductors on both ends of DC lines, the attenuation rates of the IVTWs with the increase of frequency under internal and external faults have different characteristics. The detail coefficients of the IVTW in different frequency bands are extracted by stationary wavelet transform at different scales, and the amplitudes of the IVTW in different frequency bands are expressed by wavelet transform modulus maximums (WTMMs). A criterion to identify internal and external faults is constructed based on the square of the frequency-domain equivalent attenuation rate of the IVTW. Lastly, simulation results under diverse fault conditions validate the availability of the proposed protection method. © 2020 IEEE.

关键词： Wavelet transforms

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A Unit Commitment Model Considering Peak Regulation of Units for Wind power Integrated power System

A Unit Commitment Model Considering Peak Regulation of Units...

引用

2020 IEEE/IAS Industrial and Commercial power System Asia, I and CPS Asia 2020

作者： Zhang, Xiuping Wang, Mingqiang Wang, Mengxia Jing, Linguo Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China State Grid Binzhou Power Supply Company Binzhou China

ISBN: (数字)9781728143033

ISBN: (纸本)9781728143033

The high penetration level of wind power aggravates the peak regulation difficulty of power systems, and the traditional peak regulation approach may not be able to account for the rapid fluctuation of net load. In this paper, a new unit commitment model is proposed in which the regular peak regulation, deep peak regulation, and deep peak regulation with oil operation stages of units are considered. In order to effectively track the net load fluctuation, peak power regulation capacity and peak ramp regulation capability are scheduled to address the power capacity demand and ramp capability demand, respectively. The validity and effectiveness of the proposed model are illustrated by the case studies. © 2020 IEEE.

关键词： Wind power

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Dynamic Economic Dispatch Considering Transmission-Distribution Coordination and Automatic Regulation effect of Transmission System

Dynamic Economic Dispatch Considering Transmission-Distribut...

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2020 IEEE/IAS Industrial and Commercial power System Asia, I and CPS Asia 2020

作者： Wu, Yuqian Wang, Mingqiang Wang, Mengxia Jing, Linguo Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Jinan China State Grid Binzhou Power Supply Company Binzhou China

ISBN: (纸本)9781728143033

With the increase of proportion of renewable energy, the uncertainty in power system is significantly increased, and the security operation of power system is facing more challenges. In traditional economic dispatch model, the unit output and load are expressed by constant power, which ignores the automatic regulation effect during system operation. And the transmission system and distribution system are separated optimized, the coordination effect is not considered. In this paper, a new dynamic economic dispatch model is proposed and the automatic regulation effect and transmission-distribution coordination are considered, which can improve the renewable energy accommodation and enhance the system operation security and economics. The validity and effectiveness of the proposed model are illustrated by case studies. © 2020 IEEE.

关键词： Renewable energy resources

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Short-term Voltage Stability Assessment of AC/DC power grid based on SDAE and ADAM Algorithms

Short-term Voltage Stability Assessment of AC/DC Power Grid ...

引用

2020 IEEE/IAS Industrial and Commercial power System Asia, I and CPS Asia 2020

作者： Li, Li Lin, Qirong Qu, Hanbing Liu, Bo Zhu, Yuanzhen Li, Changgang Lui, Yutian State Grid Jinan Power Supply Company Jinan China Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Jinan China

ISBN: (纸本)9781728143033

With the development of HVDC transmission and changes of load composition and characteristics, the short-term voltage problem seriously threatens the safety and stable operation of power systems. A short-term voltage stability assessment method based on deep learning neural network for AC/DC receiving-end power grid is proposed in this paper. The stacked denoising autoencoder (SDAE) and adaptive moment estimation (ADAM) algorithms are used to build a rapid evaluation model, and the training sample set is used to train the transient voltage stability rapid evaluation model. The steady-state power flow features are used as inputs and an index of quantifying short-term voltage stability of commutation bus is utilized as the output. Simulation results of real multi-infeed AC/DC power grid demonstrate the effectiveness of the proposed method. © 2020 IEEE.

关键词： Electric load flow

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A Resilience Enhancement Scheme of Cyber-Physical power System for Extreme Natural Disasters

A Resilience Enhancement Scheme of Cyber-Physical Power Syst...

引用

2020 IEEE Sustainable power and Energy Conference, iSPEC 2020

作者： Liu, Tianhao Sun, Runjia Liu, Yutian Wang, Chunyi Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China State Grid Shandong Electric Power Company Jinan China

ISBN: (纸本)9781728191645

Extreme disasters seriously threaten power system security and stable operation. power system resilience is an important means to evaluate the system response to low probability and high impact events. This paper proposes a resilience enhancement strategy based on cyber physical power system to cope with extreme natural disasters and restore the power system. At first, a defense framework for natural disaster is given to show stages and techniques used in resilience enhancement strategy. Secondly, a zone division based power flow adjustment method is proposed to adjust the transmission power with high failure probability, which can reduce the risk of cascading failures. Finally, two resilience evaluation functions considering load restoration and equipment restoration are proposed respectively to guild collaborative communication lines and transmission lines restoration. Simulation results of the New England 39-bus test system demonstrate the effectiveness. © 2020 IEEE.

关键词： Restoration

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Path Planning for Distribution Network Robots with Adaptive Simulated Annealing-Enhanced Artificial Potential Field Method

Path Planning for Distribution Network Robots with Adaptive ...

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IEEE International Conference on Industrial Technology (ICIT)

作者： Baichao Zhang Xin Chen Jinge Chen Jinbin Li Xiaokai Wang Xu Jian School of Automation China University of Geosciences Wuhan China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Wuhan China Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education Wuhan China State Grid Hubei Electric Power Co. Ltd. Electric Power Science Research Institute Wuhan P. R. China Hubei Fangyuan Dongli Electric Power Science Research Co. Ltd Wuhan P. R. China

ISBN: (数字)9798331521950

ISBN: (纸本)9798331521967

In this paper, we propose a hybrid algorithm that combines an improved Artificial Potential Field (APF) method with the Simulated Annealing (SA) algorithm for path planning of an electric power operation robot manipulator in complex distribution grid environments. To address the unreachable target issue inherent in traditional APF, we introduce a distance regulation factor to optimize the repulsive function. This modification allows the manipulator to smoothly approach the target point as it nears, while the repulsion from obstacles gradually decreases. Additionally, to overcome the limitations of the traditional SA algorithm, such as its tendency to get trapped in local minimum solutions and its inefficiency in complex environments, we propose an adaptive temperature rise strategy. This strategy increases the temperature, enhancing the probability of escaping local optimal solutions. When the APF algorithm becomes trapped in a local optimum, the improved SA algorithm is applied to escape the local minimum. Once the local optimum is avoided, the algorithm switches back to APF to continue the path planning process. Simulation results demonstrate that the proposed improved APF-SA algorithm adapts effectively to various complex environments, achieving shorter planning times and higher success rates compared to traditional APF and SA algorithms. It successfully resolves the unreachable target and local minimum problems associated with APF. Finally, the feasibility of the proposed APF-SA fusion algorithm is validated through experiments conducted on an electric power operation robot experimental platform for distribution grid applications.

关键词： Electric potential Adaptation models Force Distribution networks Simulated annealing Manipulators Path planning Planning Collision avoidance Robots

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The impact of high-speed heavy electric railway load on wind farms 4

The impact of high-speed heavy electric railway load on wind...

引用

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

作者： Zhou, Qiang Zhao, Long Han, Xushan Ma, Yanhong Zhang, Yanqi Yang, Shiyou State Grid Gansu Electric Power Research Institute Gansu Key Laboratory of Renewable Energy Integration Operation and Control Lanzhou China Zhejiang University Hangzhou China

ISBN: (纸本)9781728196060

After ten years of construction and development, the Jiuquan wind power base has taken shape and entered into reality, and the Hexi Corridor Lan-Xin Railway Electrification Project as well as the Lanzhou to Urumqi Pipeline Project will also start constructions and developments. It should be noted that the locations of the high-speed tracks, the heavy-duty electric railway traction power stations and the wind power 330kV/110kV substations will be electrically close. In this context, the electrified railway may result in an asymmetric operation and introducing harmonics to the power grid, endangering the reliability of the wind power system. Concentrated largescale off-grid win d power threatens not only the stability of Gansu power grid, but also the entire Northwest power grid. Besides, the intermittent wind power voltage fluctuations may also degrade the rehabiliy of the electric railway system power supply. To investigate these issues and problems, this work simulates and analyzes the influences of a high-speed heavy electric railway load on the wind farm performances. © 2020 IEEE.

关键词： power quality

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Multi-objective optimal scheduling of power systems based on complementary characteristics of heterogeneous energy sources 4

Multi-objective optimal scheduling of power systems based on...

引用

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

作者： Ma, Yanhong Zhao, Long Zhang, Yanqi Zhou, Qiang Zhang, Man Yang, Shiyou State Grid Gansu Electric Power Research Institute Gansu Key Laboratory of Renewable Energy Integration Operation and Control Lanzhou China Zhejiang University Hangzhou China

ISBN: (纸本)9781728196060

The rapid development of modern society and economy demands on huge electric energies, resulting in an increasing consumption on fossil fuels, and the deterioration of ecological environment. As an alternative, renewable energies such as wind energy, solar energy and water energy have entered more widely into power generation industry. Because wind power and photovoltaic power have the characteristics of randomness, intermittence, volatihty and reverse peak regulation, the massive abandonment of wind power and photovoltaic power and the massive waste of natural resources wm be inevitable. In this point of view, the complementary characteristics of various heterogeneous energy sources, such as wind, solar, hydroelectricity and thermoelectricity, are firstly analyzed;the wind-solar consumption and system power generation cost are then investigated comprehensively;and a multi-objective power system optimal dispatch model based on the complementary characteristics of the heterogeneous energy sources is finally estabhshed. Also, a regional power grid is used as a case study for the proposed methodology to vahdate its feasibihty. © 2020 IEEE.

关键词： Electric power utilization

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operation Risks Analysis and Stability control System Optimization for the Junction Area of Multiple HVDC Sending System

Operation Risks Analysis and Stability Control System Optimi...

引用

International Conference on power System Technology (powerCON)

作者： Yukun Zhu Yihua Zhu Dongxu Chang Jiawei Yu Shengnan Li Yong Chen State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China Electric Power Research Institute Yunan Power Grid Co Ltd Kunming China

ISBN: (纸本)9781665407380

The successive commissioning of HVDC projects has enabled many substations or areas to connect with multiple sending ends of HVDC simultaneously, forming a junction area of multiple HVDC sending system. The operation risks in these areas have also changed accordingly. This paper focuses on the safe and stable operation of the junction area of multiple HVDC sending system, analyzing the current operation risks of the junction area and the adaptability of the regional stability control strategies at first. Then, an optimization scheme including regional stability control strategy design and structure configuration for the junction area is put forward, whose feasibility is verified through the stability control system of Huangping area, which is a typical junction area located in the sending ends of Jinguan-Guizhong and Xinsong-Dongfang HVDC. The Successful application in Huangping area also proves that the stability control system optamization scheme for junction area of multiple HVDC sending system proposed in this paper has good completeness and scalability, that is of great significance to the design for the stability control system of similar junction area.

关键词： Substations HVDC transmission Systems operation Scalability power system stability control systems Stability analysis

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