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

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Production simulation of power systems considering the forecast error of renewable energy

Production simulation of power systems considering the forec...

引用

2016 IEEE PES Asia Pacific Power and Energy Engineering Conference, APPEEC 2016

作者： Kun, Ding Ningbo, Wang Xie, Haipeng Bie, Zhaohong Laboratory of Wind Power Integration Operation and Control Gansu Electric Power Corporation Wind Power Technology Center Lanzhou China State Key Lab. of Elec. Insulation and Pwr. Equip. and Smart Grid Key Laboratory of Shaanxi Province Xi'an Jiaotong University Xi'an China

ISBN: (纸本)9781509054183

A short-term stochastic production simulation method considering the forecast error of renewable sources power is proposed to focus on the issue that conventional production simulation method is incapable of depicting the forecast error of renewable sources power. The proposed method contains two hierarchies, i.e. the day-ahead simulation and the real-time simulation. As for day-ahead simulation, a day-ahead scheduling of conventional units and renewable energy plants is determined by solving a unit commitment model on the basis of forecasted renewable sources power and load profiles. Real-time simulation is the supplement to day-ahead simulation and it corrects the results in day-ahead simulation. The validity of the proposed method is proved with a real power grid in Northwest China. Case studies show that conventional units may be still the major resource of power grids although these installed capacity is no larger than renewable energy resources. Meanwhile, forecast errors actually impact reliability of power systems. © 2016 IEEE.

关键词： Renewable energy resources

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Self-Healing smart grid system based on artificial neural network

Self-Healing smart grid system based on artificial neural ne...

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2017 IASTED International Conference on Modelling, Identification and control, MIC 2017

作者： Li, Chen Wei, Qi Jian, Shen Zhe, Hou NARI Group Corporation State Grid Electric Power Research Institute Nanjing211106 China NARI Technology Co Ltd Nanjing211106 China State Key Laboratory of Smart Grid Protection and Control Nanjing211106 China Hangzhou Xiao Shan China Power Supply Company China

ISBN: (纸本)9780889869882

In this paper, a novel logic decomposing method in self-healing smart grid system based on neural networks is presented and the theoretical fundamentals of the design are expounded. The proposed automatic smart grid topology search algorithm, which is based on artificial neural network (ANN), realizes the adaptive function of analyzing and updating the self-healing system logic in the grid automatically. Furthermore, the configuration design in a neural network mode makes the system have the parallel processing mechanism and the ability of learning and fault decision-making. The outlet of protection is transferred from the neural networks by adjusting the connecting weights. Therefore, the system can classify and recognize arbitrarily complex connecting mode and acting logic.

关键词： Neural networks

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Day-ahead optimal scheduling of integrated energy system with electric heat pump 3

Day-ahead optimal scheduling of integrated energy system wit...

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2019 3rd International Conference on Power and Energy Engineering, ICPEE 2019

作者： Zhang, Nianchu Wang, Qi Ni, Ming Li, Manli Zhang, Zheng Nanjing Normal University College of Electrical and Automation Engineering Nanjing China NARI Group Corporation State Grid Electric Power Research Institute Nanjing China NARI Technology Co. Ltd. Nanjing China State Key Laboratory of Smart Grid Protection and Control Nanjing China

The regional integrated energy system is an effective way to realize energy cascade utilization and improve the flexibility and economy of the load side operation. Combine cooling heating and power (CCHP) system is a typical form of integrated energy systems. However, due to heat-load-based operation mode, the peak modulation capacity of CCHP units and the accommodation of renewable energy are limited. This paper explores methods of increasing the flexibility and economy of the system. An optimal scheduling model is proposed for integrated energy systems containing an electric heat pump, considering heating network characteristics. Simulation results show that the electric heat pump can help the system realize heat-and-power decoupling, improve the flexibility of the system and reduce the operating cost of the system. © 2020 IOP Publishing Ltd. All rights reserved.

关键词： Pumps

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Comprehensive Evaluation Index System and Method for Reactive Power Support Capability of Wind/Photovoltaic/Storage Power Stations 13

Comprehensive Evaluation Index System and Method for Reactiv...

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13th IEEE International Conference on CYBER Technology in Automation, control, and Intelligent Systems, CYBER 2023

作者： Fang, Jinyuan Hou, Kai Jiang, Yingwei Gao, Bingtuan Zhang, Guozhong Shi, Xuewei School of Electrical Engineering Southeast University Jiangsu Nanjing China State Key Laboratory of Smart Grid Protection and Control Nanrui Group Co. Jiangsu Nanjing China State Grid Hebei Zhangjiakou Scenery Storage and Transmission New Energy Co. Ltd Hebei Zhangjiakou China

ISBN: (纸本)9798350315196

High proportion of renewable energy integrated into the power grid results in lower system inertia and deterioration of voltage characteristics. Understanding the reactive power support characteristics of wind/photovoltaic (PV) /storage power station is critical for achieving coordinated control of their reactive power. In this regard, the paper proposes a comprehensive evaluation index system that considers voltage, reactive power support, and reactive power control to evaluate the reactive power support capability of wind/photovoltaic/storage power station. To validate the effectiveness of the index system, this paper constructs a simulation scenario of a wind/photovoltaic/storage power station connected to the regional power grid and calculates the corresponding indices. The fuzzy membership function is used to normalize the indicators. The subjective and objective combination weighting method is used to assign values to the indicators, and the reactive power support capability ratings of each power station are calculated. Finally, the reactive power support capability of the wind/photovoltaic/storage power plant was analyzed in combination with simulation scenarios, and the effectiveness of the comprehensive evaluation index system and method was verified. © 2023 IEEE.

关键词： Deterioration

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NILT - Based Transient Traveling Wave Calculation Method for Lightning Stroke on Coupled Transmission Lines in DC Systems

NILT - Based Transient Traveling Wave Calculation Method for...

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IEEE International Conference on Power and Energy Systems (ICPES)

作者： Ziqiang Ouyang Zheng Yan Tonghua Wu Wei Dai Xindong Li Xiaofan Hou State Key Laboratory of Smart Grid Protection and Control (Nari Group Corporation) Laboratory of Control of Power Transmission and Conversion Ministry of Education Shanghai Jiao Tong University Shanghai China State Key Laboratory of Smart Grid Protection and Control (Nari Group Corporation) Nanjing China

Overhead lines are the main way of power transmission in HVDC system. The fault traveling wave propagates along the line after lightning stroke, which may cause accidents. Fault identification and protection design rely on traveling wave analysis and calculation. The time domain solution of transmission line telegraph equations is complicated. Analysis in the complex frequency domain can reduce the computational difficulty. Firstly, this paper decouples the DC transmission line through phase-mode transformation and establishes the model. Then, the post-lightning boundary conditions are introduced and the calculation network is established. On this basis, it solves the expression of traveling wave based on nodal analysis method. Finally, with the numerical inverse Laplace transform, calculation results in complex frequency domain are converted into time domain. The proposed method can reflect the transient process after lightning stroke, which has engineering value for protection design.

关键词： Fault diagnosis Power transmission lines Frequency-domain analysis Simulation Lightning Voltage Transmission line theory

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Real Time Monitoring Method of Comprehensive Energy Consumption Based on Data Mining Algorithm

Real Time Monitoring Method of Comprehensive Energy Consumpt...

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作者： Qian, Gang Tang, Chenghong Meng, Yao Qi, Xiaomin Wang, Jingtao Zhou, Jing State Grid Shaoxing Power Supply Company Zhejiang Shaoxing312099 China State Grid Electric Power Research Institute Nanjing211106 China Nari Technology Development Limited Company Nanjing211106 China State Key Laboratory of Smart Grid Protection and Operation Control Nanjing211106 China China Electric Power Planning and Engineering Institute Beijing100120 China Beijing Nari Digital Technology Co. Ltd. Beijing100085 China

With the expansion of data centers, total consumption is growing exponentially. The center is faced with problems such as reducing power consumption, reducing costs and improving resource utilization. Reducing energy costs through monitoring is an important means of energy conservation in data centers. In recent years, more and more real-time energy consumption data are stored on the energy consumption management platform. There is a wealth of knowledge hidden in the energy consumption data in recent years. A large amount of data simplifies the traditional methods, and data mining methods have achieved good results in many fields. Therefore, it is of great significance to study a new energy consumption monitoring system and introduce data mining method into the system. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Energy utilization

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Ultra-short-term wind speed forecasting method based on spatial and temporal correlation models

Ultra-short-term wind speed forecasting method based on spat...

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6th International Conference on Renewable Power Generation

作者： Zhou, Haiqiang Xue, Yusheng Guo, Jizhu Chen, Jiehui Energy and Electrical Engineering School Hohai University Nanjing Jiangsu Province211100 China NARI Group Corporation State Grid Electric Power Research Institute Nanjing211106 China State Key Laboratory of Smart Grid Protection and Control Nanjing211106 China

An ultra-short-term wind speed forecasting method based on spatial and temporal correlation models is proposed. Firstly, the temporal correlation model was studied. The generalised distance of wind speed time series is defined based on the dynamic time warping distance and correlation coefficient. Samples with similar wind dynamic patterns are classed into the same group. Time series in one group are depicted with a representative time series which is modelled by an autoregressive moving average (ARMA) model. For time series which cannot be classed to any of these groups, a special group was defined. It was modelled by artificial neural network (ANN). Secondly, the spatial correlation between the target wind farm and the reference wind farm was investigated with the meteorological data taking into consideration. The grey prediction method is utilised to predict the wind speed. Finally, the combined ultra-short-term wind speed forecasting method is proposed. It takes into account the inherent time correlation of the target wind speed and its spatial correlation with reference wind farm. The wind speed prediction of wind farms in northwest USA verifies the effectiveness and feasibility of the proposed method. © 2017 Institution of Engineering and Technology. All rights reserved.

关键词： Time series

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Improving Convergence of IEEE 1588v2 Protocol Using Clock Servo System

Improving Convergence of IEEE 1588v2 Protocol Using Clock Se...

引用

International Conference on Communications, Signal Processing, and Systems, CSPS 2018

作者： Gu, Weiwen Yu, Yue Tong, Heqin Gao, Qin Zhang, Zhijian Wang, Jian School of Electronic Science and Engineering Nanjing University 163 Xianlin Road NanjingJiangsu210023 China State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation 19 Chengxin Road NanjingJiangsu211000 China

ISBN: (纸本)9789811362637

Precise time synchronization is widely used in several domains such as Internet of Things (IoT), communication industry, power system and so on. Among all-time synchronization protocols, IEEE 1588v2 Protocol has received extensive attention, due to its submicrosecond accuracy and high-cost performance. However, it is not great enough in the convergence performance of synchronization in software-only system. Therefore, the aim of this paper is to speed up the convergence by control the jitter in software-only system. There are several methods proposed to reduce the jitter brought by soft timestamp and nonreal-time operating system. We compare and analyze various methods and choose clock servo system to experiment. The results of experiments verify that the clock servo system reduces the convergence time and improves the synchronization accuracy to some extent. © 2019, Springer Nature Singapore Pte Ltd.

关键词： Jitter

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The Research of New Network Architecture of protection and control Device in Substation

The Research of New Network Architecture of Protection and C...

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“紫金论电”2017智能电网保护和运行控制国际学术研讨会

作者： ZHENG Yuping WU Tonghua DAI Wei ZHOU Hualiang LI Yanxin JIANG Yuan State Key Laboratory of Smart Grid Protection and Control Nanjing 211106China NARI Group Corporatio State Key Laboratory of Smart Grid Protection and Control Nanjing 211106China NARI Technology Co.Lt State Key Laboratory of Smart Grid Protection and Control Nanjing 211106China NARI Technology Co.Lt NARI Technology Co.Ltd. Nanjing 211106China

The paper presents the configuration principle on near-process installation of protection and control device firstly,regarding to problems and challenges relevant to equipment configuration and telecommunication network brought up by secondary device near-process installation in ***,the solutions of secondary near-process device configuration are also proposed which include relay protection within both standalone bay and across bays,bay control unit and public terminal,*** addition,two telecommunication solutions are also given based on the above,which include two aspects,the first is the network architecture with MMS/SV/GOOSE network all in one based on PRP,and the second is HSR network which is independent on ***,network performance is estimated and compared quantized.

关键词： near-process installation network architecture multi-HSR PRP MMS/SV/GOOSE network public terminal synchronous sampling

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Vertically Integrated Outdoor In-situ Line protection

Vertically Integrated Outdoor In-situ Line Protection

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“紫金论电”2017智能电网保护和运行控制国际学术研讨会

作者： WU Tonghua ZHENG Yuping HU Guo YAO Gang ZHOU Hualiang Hou Xiaofan State Key Laboratory of Smart Grid Protection and Control Nanjing 211106China NARI Technology Co.Lt State Key Laboratory of Smart Grid Protection and Control Nanjing 211106China NARI Group Corporatio NARI Technology Co.Ltd. Nanjing 211106China State Key Laboratory of Smart Grid Protection and Control Nanjing 211106China NARI Technology Co.Lt

Aiming at the problems of speed,reliability,operation and maintenance in the practical application of line protection in conventional and smart substation,system architecture and technical scheme of in-situ(similar with the meaning of on site or near process)line protection based on vertical integration and outdoor installation are *** functions of single-bay merge unit,relay protection,intelligent terminal are integrated vertically to reduce device amounts and varieties,simply configuration,reduce signal transmission,shorten the protection action ***'s more,this vertically integrated device is applied to provide data acquisition and control execution support for substation-area protection,security and stability device and other substation-area *** performances are tested and ***,the scheme is verified to be feasible and advanced through the results of the experiment.

关键词： in-situ relay protection line protection merge unit vertical integration

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