检索结果-内蒙古大学图书馆

IEEE-Region-10 Conference (IEEE TENCON)

作者： Yin, Xueyan Liu, Yutian Shandong Univ Minist Educ Key Lab Power Syst Intelligent Dispatch & Control Jinan Shandong Peoples R China

ISBN: (纸本)9781538654576

A novel feature reduction method based on deep learning is proposed for power system transient stability assessment (TSA) in this paper. First of all, an original feature set including three parts of features is set up. Secondly, the stacked autoencoder (SAE) is used to extract the multi-level features from raw inputs by its reconstruction weights. Then, a weight analysis method based on mutual information is put forward to optimize the number of hidden nodes in SAE, which can remove the irrelevant and redundant features in each layer of SAE at the same time. Finally, test results demonstrate that the proposed method can reduce the training burden of SAE effectively, and the assessment of transient stability is more accurate by applying the features obtained by the proposed method.

关键词： transient stability assessment feature reduction deep learning mutual information

来源：评论

学校读者我要写书评

暂无评论

An improved fault recovery strategy for active distribution network considering LVRT capability of DG

An improved fault recovery strategy for active distribution ...

引用

8th Renewable power Generation Conference (RPG 2019)

作者： Yongji Cao Weisheng Liu Yi Zhang Hengxu Zhang Key Laboratory of Power System Intelligent Dispatch and Control of the Ministry of Education (Shandong University) Jinan China State Grid Shandong Electric Power Company Jinan China

ISBN: (数字)9781839531248

ISBN: (纸本)9781839531255

The growing integration of distributed generation (DG) has changed the operation characteristics of traditional distribution network, and so the active distribution network (ADN) has emerged. Fault recovery is significant to reduce the loss of power failure, but the traditional control strategy without consideration of DG is no longer suitable for ADN. An improved fault recovery strategy is proposed to coordinate the fault reclosing and the low voltage ride through (LVRT) capability of DG. The influence of fault reclosing on the voltage variation of the point of common coupling (PCC) of DG is analyzed, with different relative locations of fault and PCC, and a critical LVRT voltage is extracted from the scenario where fault reclosing fails. In order to avoid DG outage, a blocking criterion of fault reclosing is presented according to the fault location and the first voltage dip of PCC. Then, the ADN can be split into planned islands considering the balance of DG power and loads and the load priorities, once the fault reclosing is blocked. Moreover, the WAMS Light is implemented for high-speed synchronous data collection and online central control. A case study is conducted to verify the effectiveness of proposed approach.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Method for Single-phase Electric Meter Phase Discrimination Based on Multiple Linear Regression

Method for Single-phase Electric Meter Phase Discrimination ...

引用

International Conference on Advanced power system Automation and Protection (APAP)

作者： Liqiang Zhang Wei Cong Gang Dong Yun Sun 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: (数字)9781728117225

ISBN: (纸本)9781728117232

The phase information of single-phase electric meter is crucial to improve the level of load management and the quality of modeling. A method for single-phase electric meter phase discrimination based on multiple linear regression (MLR) is proposed. The MLR equation takes the single-phase electric meter voltage as the dependent variable. Meanwhile, it takes the gateway meter voltage, the gateway meter current and the single-phase electric meter current as the independent variables. Each single-phase meter forms a regression equation with the gateway meter A, B and C respectively. The determination coefficients of the three regression equations are calculated. According to the value of the coefficients, the phase of single-phase electric meter is discriminated. An example is given to analyze the proposed method with actual energy meter reading data. The analysis results show that the proposed method has higher accuracy and reliability.

关键词： Meters Mathematical model Logic gates Voltage measurement power supplies Correlation power measurement

来源：评论

学校读者我要写书评

暂无评论

A Design of Integrated Protection Principle for Box-type Substation

引用

IOP Conference Series: Earth and Environmental Science 2021年第1期770卷

作者： Yunchi Zhang Houlei Gao Shichang Du Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan Shandong 250061 China Shandong Lusheng Electrical Equipments Company Limited Rizhao Shandong 276800 China

Box-type substation plays a very important role in distribution network. The protection of traditional box-type substation needs to be equipped with multiple equipment, and there is often a lack of selectivity between protections of low-voltage side and low-voltage outgoing lines of transformer. In order to solve these problems, an integrated protection principle of box-type substation is proposed, which uses relay protection to replace the traditional protection form. An adaptive fault component overcurrent protection is proposed to improve the sensitivity of protection, and an operation time selection criterion is put forward to ensure selectivity and clear fault quickly in some cases. Finally, the performance of proposed protection principle is verified by PSCAD simulation.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Fast Search of Cascading Failures Chains in AC-DC Hybrid power system

Fast Search of Cascading Failures Chains in AC-DC Hybrid Pow...

引用

IEEE-Region-10 Conference (IEEE TENCON)

作者： Zhu, Yuanzhen Li, Wenbo Liu, Yutian Shandong Univ Minist Educ Key Lab Power Syst Intelligent Dispatch & Control Jinan Shandong Peoples R China

ISBN: (纸本)9781538654576

A fast search method of cascading failure in AC-DC system is proposed to acquire high-risk AC-DC system cascading failure chains. At first, the impact of AC system cascading failures chains (CFSs) on DC system is fast estimated according to the multi-infeed short-circuit ratio (MISCR) and the short-circuit voltage of converter bus, which are two key characteristics of AC system faults. Then, a fixed number pruning technique is adopted in the proceeding of CFSs searching to reduce search space. In order to rank the risk of lines in offspring, a line failure risk index R based on lines failure probability and influence on other lines is proposed. Finally, time-domain simulation is adopted to analyze whether the most severe AC system CFSs can trigger DC block. The effectiveness of the method proposed to search high-risk CFSs in AC-DC Hybrid power system is verified by the simulations concerning the Shandong power grid of China.

关键词： AC-DC hybrid power system cascading failure chains multi-infeed short-circuit ratio pruning technique

来源：评论

学校读者我要写书评

暂无评论

A Voltage Modulated Direct power control of the Doubly Fed Induction Generator

A Voltage Modulated Direct Power Control of the Doubly Fed I...

引用

IEEE-power-and-Energy-Society General Meeting (PESGM)

作者： Gao, Shuning Zhao, Haoran Gui, Yonghao Zhang, Zhenbing Wu, Qiuwei Shandong Univ Sch Elect Engn Jinan 250061 Peoples R China Shandong Univ Key Lab Power Syst Intelligent Dispatch & Control Minist Educ Jinan 250061 Peoples R China Aalborg Univ Dept Elect Syst Automat & Control Sect Aalborg Denmark Tech Univ Denmark Dept Elect Engn Lyngby Denmark

ISBN: (纸本)9781728119816

In this paper, a Voltage Modulated Direct power control (VM-DPC) for doubly fed induction generator is proposed. The suggested method is implemented in the rotor reference frame, so that the phase-lock loop can be removed and relevant potential instability can be eliminated. The main advantage is that the proposed method has a relative simple structure compare to conventional Look-Up Table (LUT) DPC and sliding mode control (SMC), besides, it not only guarantees an enhanced transient performance but also keeps the steady-state harmonic spectra at the same level as voltage-oriented strategy. Finally, a simulation based on MATlab/Simulink is provided to validate the performance of proposed VM-DPC strategy.

关键词： control of doubly fed induction generator direct power control (DPC) voltage modulated

来源：评论

学校读者我要写书评

暂无评论

Activating Reactive power Support from Active Distribution systems

Activating Reactive Power Support from Active Distribution S...

引用

IEEE-power-and-Energy-Society General Meeting (PESGM)

作者： Yi, Yu Chu, Xiaodong Liu, Yutian Shandong Univ Minist Educ Key Lab Power Syst Intelligent Dispatch & Control Jinan Shandong Peoples R China

ISBN: (纸本)9781538677032

With the amount of PV units, ESS units and other controllable resources increase, distribution grids are no longer just absorbing power and energy from transmission grids but get involved in the operation even help to sustain the stability of top level under heavy load. However, transmission and distribution grids usually operate from their own respective and it is difficult to coordinate the integrate systems with few information at the coupling point. In this paper, a reactive power coordination scheme is proposed to make a full use of the controllable resources in distribution grids to mitigate the power requirement and embody transmission grid as a role of strong supporter when need. Simulation results on a 30-bus connecting with three 33-bus system demonstrate the effectiveness and practicality of the proposed coordination scheme.

关键词： reactive power controllable resources coordinating optimization ADNs voltage support

来源：评论

学校读者我要写书评

暂无评论

Optimal overcurrent relay coordination in distribution network based on Lightning Flash Algorithm

引用

ENGINEERING COMPUTATIONS 2018年第3期35卷 1140-1160页

作者： Kheshti, Mostafa Kang, Xiaoning Shandong Univ Key Lab Power Syst Intelligent Dispatch & Control Minist Educ Jinan Shandong Peoples R China Xi An Jiao Tong Univ Shaanxi Key Lab Smart Grid Xian Shaanxi Peoples R China

Purpose Distribution network protection is a complicated problem and mal-operation of the protective relays due to false settings make the operation of the network unreliable. Besides, obtaining proper settings could be very complicated. This paper aims to discuss an innovative evolutionary Lightning Flash Algorithm (LFA) which is developed for solving the relay coordination problems in distribution networks. The proposed method is inspired from the movements of cloud to ground lightning strikes in a thunderstorm phenomenon. LFA is applied on three case study systems including ring, interconnected and radial distribution networks. The power flow analysis is performed in Digsilent power Factory software;then the collected data are sent to MATlab software for optimization process. The proposed algorithm provides optimum time multiplier setting and plug setting of all digital overcurrent relays in each system. The results are compared with other methods such as particle swarm optimization and genetic algorithm. The result comparisons demonstrate that the proposed LFA can successfully obtain proper relay settings in distribution networks with faster speed of convergence and lower total operation time of relays. Also, it shows the superiority and effectiveness of this method against other algorithms. Design/methodology/approach A novel LFA is designed based on the movements of cloud to ground lightning strikes in a thunderstorm. This method is used to optimally adjust the time multiplier setting and plug setting of the relays in distribution system to provide a proper coordination scheme. Findings The proposed algorithm was tested on three case study systems, and the results were compared with other methods. The results confirmed that the proposed method could optimally adjust the relay settings in the electric distribution system to provide a proper protection scheme. Practical implications The practical implications can be conducted on distribution networks. The studie

关键词： Optimization Distribution network Lightning Flash Algorithm Overcurrent relay Plug setting Time multiplier setting Overcurrent relay coordination

来源：评论

学校读者我要写书评

暂无评论

Distributed Dynamic State Estimation in Active Distribution system Based on Particle Filter

Distributed Dynamic State Estimation in Active Distribution ...

引用

2018 International Conference on Innovative Smart Grid Technologies, ISGT Asia 2018

作者： Zhang, Tingting Zhang, Wen Yuan, Peiran Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education School of Electrical Engineering Shandong University Jinan China

ISBN: (纸本)9781538642917

In this paper, a distributed dynamic state estimation (DDSE) based on particle filter (PF) for real-time monitoring of the active distribution system is proposed. The active distribution system is partitioned into several areas with local estimators. Local estimations based on PF are performed with the collected measurement information from phasor measurement units (PMUs) within their own area and forecasted loads, after which the posterior estimates of boundary buses are exchanged between neighboring areas. Re-estimations will be performed until the differences of the estimates of boundary buses from different estimators don't exceed the given limits. In addition, the influences of distributed generators (DGs) are also considered, the outputs of which are approximated by Gaussian mixture model (GMM). Simulation results based on 119-bus distribution system demonstrate the effectiveness of the proposed method. © 2018 IEEE.

关键词： Phasor measurement units

来源：评论

学校读者我要写书评

暂无评论

A method for determining equipment to be maintained based on comprehensive risk assessment of power system 2

A method for determining equipment to be maintained based on...

引用

2nd International Workshop on Renewable Energy and Development (IWRED)

作者： Zhou, Yingjian Wang, Yong Shandong Univ Minist Educ Key Lab Power Syst Intelligent Dispatch & Control Jinan Shandong Peoples R China

With the development of on-line monitoring and condition-based maintenance, the optimization research of condition-based maintenance scheduling is getting more and more important. A reasonable maintenance strategy can save a lot of energy and reduce costs. This paper proposes a method to determine the equipment to be maintained, which is based on the comprehensive risk assessment of power system. First we build a mathematical model of maintenance based on comprehensive risk index. Then non-sequential Monte Carlo simulation and DC power flow optimization model are used to minimize the sum of failure risks and maintenance risks. Finally, the feasibility and validity of the proposed model is analyzed on the IEEE-RTS79 system.

关键词： Risk assessment

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：