检索结果-南通市图书馆

Cluster voltage control method for “Whole County” distributed photovoltaics based on improved differential evolution algorithm

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers in Energy 2023年第6期17卷 782-795页

作者： Jing ZHANG Tonghe WANG jiongcong chen Zhuoying LIAO Jie SHU School of Energy Science and Engineering University of Science and Technology of ChinaHefei 230026China Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou 510640China Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering Changzhou 213001China

China is vigorously promoting the “whole county promotion” of distributed photovoltaics (DPVs). However, the high penetration rate of DPVs has brought problems such as voltage violation and power quality degradation to the distribution network, seriously affecting the safety and reliability of the power system. The traditional centralized control method of the distribution network has the problem of low efficiency, which is not practical enough in engineering practice. To address the problems, this paper proposes a cluster voltage control method for distributed photovoltaic grid-connected distribution network. First, it partitions the distribution network into clusters, and different clusters exchange terminal voltage information through a “virtual slack bus.” Then, in each cluster, based on the control strategy of “reactive power compensation first, active power curtailment later,” it employs an improved differential evolution (IDE) algorithm based on Cauchy disturbance to control the voltage. Simulation results in two different distribution systems show that the proposed method not only greatly improves the operational efficiency of the algorithm but also effectively controls the voltage of the distribution network, and maximizes the consumption capacity of DPVs based on qualified voltage.

关键词： distributed photovoltaics(DPVs) cluster partitioning improved differential evolution algorithm voltage control consumption capacity of distributed photovoltaics

Thermo-Economic Performance of Geothermal Driven High-Temperature Flash Tank Vapor Injection Heat Pump System:A Comparison Study

在线全文

学校读者我要写书评

暂无评论

Energy Engineering 2023年第8期120卷 1817-1835页

作者： Huashan Li Xiaoshuang Zhao Sihao Huang Lingbao Wang jiongcong chen Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou510640China University of Chinese Academy of Sciences Beijing100049China

Process heating constitutes a significant share of final energy consumption in the industrial sector around the *** this paper,a high-temperature heat pump(HTHP)using flash tank vapor injection technology(FTVI)is proposed to develop low-temperature geothermal source for industrial process heating with temperature above 100°*** heat sink output temperatures between 120°C and 150°C,the thermo-economic performance of the FTVI HTHP system using R1234ze(Z)as refrigerant is analyzed and also compared to the single-stage vapor compression(SSVC)system by employing the developed mathematical *** coefficient of performance(COP),exergy efficiency(ηexe),net present value(NPV)and payback period(PBP)are used as performance *** results show that under the typical working conditions,the COP andηexe of FTVI HTHP system are 3.00 and 59.66%,respectively,and the corresponding NPV and PBP reach 8.13×106 CNY and 4.13 years,*** the high-temperature heating conditions,the thermo-economic performance of the FTVI HTHP system is significantly better than that of the SSVC system,and the larger the temperature lift,the greater the thermo-economic advantage of the FTVI HTHP ***,the FTVI HTHP system is more capable than the SSVC system in absorbing the financial risks associated with changes of electricity price and natural gas price.

关键词： Geothermal water high-temperature heat pump flash tank vapor injection thermo-economic performance

Impact analysis of false data injection attacks on power system static security assessment

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2016年第3期4卷 496-505页

作者： jiongcong chen Gaoqi LIANG Zexiang CAI Chunchao HU Yan XU Fengji LUO Junhua ZHAO School of Electric Power South China University of TechnologyGuangzhouChina Electric Power Research Institute of Guangdong Power Grid GuangzhouChina Centre for Intelligent Electricity Networks University of NewcastleNewcastleAustralia School of Electrical and Information Engineering University of SydneySydneyAustralia School of Civil Engineering University of SydneySydneyAustralia School of Science&Engineering Chinese University of Hong Kong(Shenzhen)GuangdongChina

Static security assessment(SSA) is an important procedure to ensure the static security of the power *** recently show that cyber-attacks might be a critical hazard to the secure and economic operations of the power system. In this paper, the influences of false data injection attack(FDIA) on the power system SSA are studied. FDIA is a major kind of cyber-attacks that can inject malicious data into meters, cause false state estimation results, and evade being detected by bad data detection. It is firstly shown that the SSA results could be manipulated by launching a successful FDIA, which can lead to incorrect or unnecessary corrective actions. Then,two kinds of targeted scenarios are proposed, i.e., fake secure signal attack and fake insecure signal attack. The former attack will deceive the system operator to believe that the system operates in a secure condition when it is actually not. The latter attack will deceive the system operator to make corrective actions, such as generator rescheduling, load shedding, etc. when it is unnecessary and costly. The implementation of the proposed analysis is validated with the IEEE-39 benchmark system.

关键词： Cyber physical power system Static security assessment False data injection attacks State estimation

Assessment of Low Global Warming Potential Refrigerants for Waste Heat Recovery in Data Center with On-Chip Two-Phase Cooling Loop

在线全文

学校读者我要写书评

暂无评论

Frontiers in Heat and Mass Transfer 2024年第4期22卷 1171-1188页

作者： Yuming Zhao Jing Wang Bin Sun Zhenshang Wang Huashan Li jiongcong chen Shenzhen Power Supply Bureau Co. Ltd.Shenzhen518020China Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou510640China

Data centers(DCs)are highly energy-intensive facilities,where about 30%–50%of the power consumed is attributable to the cooling of information technology *** makes liquid cooling,especially in twophase mode,as an alternative to air cooling for the microprocessors in servers of *** need to meet the increased power density of server racks in high-performance DCs,along with the push towards lower global warming potential(GWP)refrigerants due to environmental concerns,has motivated research on the selection of two-phase heat transfer fluids for cooling servers while simultaneously recovering waste *** this regard,a heat pump-assisted absorption chiller(HPAAC)system for recovering waste heat in DCs with an on-chip twophase cooling loop driven by the compressor is proposed in the present paper and the low GWP hydrofluoroolefin refrigerants,including R1224yd(Z),R1233zd(E),R1234yf,R1234ze(E),R1234ze(Z),R1243zf and R1336mzz(Z),are evaluated and compared against R245fa as server *** theHPAAC system,beginning with the development of energy and economic models,the performance is analyzed through both a parametric study and optimization using the coefficient of performance(COP),energy saving ratio(ESR),payback period(PBP)and net present value(NPV)as thermo-economic *** a standard vapor compression cooling system as a benchmark,the results indicate that with the evaporation temperature between 50℃and 70℃and the subcooling degree ranging from5℃to 15°C,R1233zd(E)with moderate compressor suction pressure and pressure ratio is the best refrigerant for the HPAAC systemwhile R1234yf performs the *** importantly,R1233zd(E)is also superior to R245fa based on thermo-economic performance,especially under work conditions with relatively lower evaporation temperature as well as subcooling *** the given working conditions,the overall COP,ESR,NPV,and PBP of R1233zd(E)HPAAC with optimum subcooling degree range from4.99 to 11.27,25.5

关键词： Heat pump absorption chiller waste heat recovery two-phase cooling loop

Modeling of IEEE1588 on OPNET and Analysis of Asymmetric Synchronizing Error in Smart Substation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy and Power Engineering 2013年第4期5卷 540-545页

作者： jiongcong chen Haizhu Wang Chunchao Hu Kai Ma Zexiang Cai Electric Power Research Institute Guangdong Power Grid Corporation Guangzhou China South China University of Technology Guangzhou China

The IEEE1588 network time synchronization, matched with smart substation information network transmission, is becoming the next generation advanced data synchronization of the smart substation. It is known that the inherent asymmetry error of the network synchronization approach in the smart substation is highlighted, which is concerned particularly. This paper models the synchronization process of the IEEE1588 based on the communication simulation software of OPNET Modeler. Firstly, it builds the models of master-slave clock, IEEE1588 protocol and network synchroniza- tion model, and analyzes the composition and influencing factors of the asymmetry error. Secondly, it quantitatively analyzes the influence of the synchronous asymmetric error of the IEEE1588 affected by the network status differences and the clock synchronization signal transmission path differences. Then its correction method is analyzed, in order to improve the IEEE1588 synchronization reliability and gives the solutions to its application in smart substation.

关键词： Smart Substation IEEE1588 Synchronization Asymmetric Error

基于OPNET的电网自动化系统建模与性能评价

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

电力自动化设备 2017年第4期37卷 185-190页

作者：席禹蔡泽祥陈炯聪潘天亮华南理工大学电力学院广东广州510640

从建模仿真和定量分析这2个角度出发,提出电网自动化系统建模和性能评价方法,为电网自动化系统设计、运行以及规划提供分析手段与优化思路。首先分析了基于OPNET的电网自动化系统建模内容及结构,并分别从电网自动化系统设备模型、协议... 详细信息

从建模仿真和定量分析这2个角度出发,提出电网自动化系统建模和性能评价方法,为电网自动化系统设计、运行以及规划提供分析手段与优化思路。首先分析了基于OPNET的电网自动化系统建模内容及结构,并分别从电网自动化系统设备模型、协议模型和信息调度模型三方面对其进行详细阐述。进一步,在分析电网自动化系统运行状态和当前系统性能评价方法局限性的基础上,提出电网自动化系统性能综合指标评价方法,并基于某地区电网自动化系统进行仿真与算例分析。结果表明,基于OPNET的电网自动化系统模型能够有效模拟系统各类运行场景,提出的电网自动化系统性能评价方法能够有效辨识系统运行状态。

关键词： OPNET 电网自动化系统系统建模定量分析性能评价

在线全文

学校读者我要写书评

暂无评论

主动配电网分层分布控制策略及实现

电网技术 2015年第6期39卷 1511-1517页

作者：钟清张文峰周佳威刘东陈炯聪陈云辉广东电网有限责任公司电力传输与功率交换控制教育部重点实验室(上海交通大学电气工程系)

配电网大量接入分布式电源和储能装置后,集中式的管理模式实时性较差,因此文章提出3层控制结构,将主动配电网进行区域划分,并在每个区域中配置协调控制器进行区域自治控制。根据馈线控制误差(feeder control error,FCE)指标,建立了实时... 详细信息

配电网大量接入分布式电源和储能装置后,集中式的管理模式实时性较差,因此文章提出3层控制结构,将主动配电网进行区域划分,并在每个区域中配置协调控制器进行区域自治控制。根据馈线控制误差(feeder control error,FCE)指标,建立了实时平抑区域运行状态与最优目标之间差异的区域控制机制,据此提出了分层分布控制器与源网协调控制器的模型。根据FCE指标的不同形式,提出馈线定交换功率、区域独立自治和区域协同自治3种控制模式,以适应不同电网需求。最后通过广东某主动配电网示范现场算例的仿真分析,验证了所提分层分布控制策略的合理性和有效性。

关键词：主动配电网分布式能源馈线控制误差分层分布控制区域控制器

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

主动配电网电压协调控制

南方电网技术 2015年第9期9卷 81-86页

作者：尤毅陈炯聪余南华广东电网有限责任公司电力科学研究院广州510080

分布式发电的协调控制与管理为主动配电网的主动电压调节提供了更多的技术手段,使得主动配电网的电压协调控制成为可能。分析了分布式发电对于现有配电网电压水平及其控制策略的影响,在此基础上研究并提出了主动配电网的电压分层协调控... 详细信息

分布式发电的协调控制与管理为主动配电网的主动电压调节提供了更多的技术手段,使得主动配电网的电压协调控制成为可能。分析了分布式发电对于现有配电网电压水平及其控制策略的影响,在此基础上研究并提出了主动配电网的电压分层协调控制体系及其策略。一方面利用馈线电压的精准估算,通过闭环控制逻辑实现单条馈线的电压水平实时控制,并设计了相应的主动配电网电压协调控制器;另一方面借助变电站变压器的分接头调节和电容器投切协调多馈线的电压水平,确保配网的电压质量。针对一个双馈线主动配电网的仿真试验验证了所提控制策略的有效性及实用性。

关键词：分布式发电主动配电网电压协调控制闭环控制

网络通信记录分析系统在数字化变电站中的应用

在线全文

学校读者我要写书评

暂无评论

电力系统自动化 2010年第14期34卷 92-95页

作者：王治民陈炯聪任雁铭王斌孙凤娇北京四方继保自动化股份有限公司北京市100085 广东电网公司电力科学研究院广东省广州市510600

在数字化变电站中,过程总线将替代电缆硬连接用于模拟量、状态量和跳闸信号的传输。为了便于运行和维护,有必要对数字化变电站的通信过程进行记录和分析。文中以一套实际系统为例,对网络通信记录仪和分析仪实现的关键技术进行了分析,涉... 详细信息

在数字化变电站中,过程总线将替代电缆硬连接用于模拟量、状态量和跳闸信号的传输。为了便于运行和维护,有必要对数字化变电站的通信过程进行记录和分析。文中以一套实际系统为例,对网络通信记录仪和分析仪实现的关键技术进行了分析,涉及通信在线分析和大数据量存储等;该系统通过采用特殊设计的智能网卡,提高了网卡吞吐量,从而提高了记录仪可接入的合并单元数量。文中还对网络记录分析系统未来的发展趋势进行了预测。

关键词：数字化变电站 IEC 61850 通信记录在线分析事故分析运行维护