scholarly journals Fault location in power distribution systems considering a dynamic load model

2015 ◽  
Vol 35 (1Sup) ◽  
pp. 34-41 ◽  
Author(s):  
Harold Andres Cifuentes Chaves ◽  
Daniel Fernando Patiño Ipus ◽  
Juan Jose Mora Flórez
Keyword(s):  
Dynamic Load ◽  
Power Distribution ◽  
Distribution Systems ◽  
Fault Location ◽  
Transient Stability ◽  
Test System ◽  
Constant Current ◽  
Load Model ◽  
Load Models ◽  
Dynamic Load Model

<span>In the electrical power systems, load is one of the most difficult elements to be represented by an adequate mathematical model due <span>to its complex composition and dynamic and non-deterministic behavior. Nowadays, static and dynamic load models have been <span>developed for several studies such as voltage and transient stability, among others. However, on the issue of power quality, dynamic <span>load models have not been taken into account in fault location. This paper presents a fault location technique based on sequence <span>components, which considers static load models of constant impedance, constant current and constant power. Additionally, an <span>exponential recovery dynamic load model, which is included in both the fault locator and the test system, is considered. This last <span>model is included in order to consider the dynamic nature of the load and the performance of the fault locators under this situation. <span>To demonstrate the adequate performance of the fault locator, tests on the IEEE 34 nodes test feeder are presented. According to the <span>results, when the dynamic load model is considered in both the locator and the power system, performance is in an acceptable range.</span></span></span></span></span></span></span></span><br /><br class="Apple-interchange-newline" /></span><p class="Abstractandkeywordscontent"> </p>

Optimal fault location for power distribution systems with distributed generations using synchronized measurements

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Wen Fan ◽  
Yuan Liao ◽  
Ning kang
Keyword(s):  
Power Distribution ◽  
Distribution Systems ◽  
Fault Location ◽  
Test System ◽  
Power Distribution Systems ◽  
Distributed Generations ◽  
High Penetration ◽  
Maintenance Time ◽  
Phasor Measurements ◽  
Synchronized Measurements

AbstractAccurate fault location in distribution systems greatly shortens maintenance time and improves reliability. This paper presents novel methods to pinpoint fault location and identify possible bad measurements for enhanced accuracy. It is assumed that network parameters and topology of the distribution network are available. The methods are applicable to a single fault as well as simultaneous faults and are applicable to both balanced and unbalanced networks. The methods utilize synchronized voltage and current phasor measurements to locate the fault. The methods are validated by simulation studies using the modified IEEE 34-Node Test System. Case studies have demonstrated that the methods are suitable for distribution systems with high penetration of distributed generations.

scholarly journals Optimal Placement of IoT-Based Fault Indicator to Shorten Outage Time in Integrated Cyber-Physical Medium-Voltage Distribution Network

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4928
Author(s):  
Jing Li ◽  
Jinrui Tang ◽  
Xinze Wang ◽  
Binyu Xiong ◽  
Shenjun Zhan ◽  
...  
Keyword(s):  
Communication Network ◽  
Internet Of Things ◽  
Power Distribution ◽  
Distribution Systems ◽  
Fault Location ◽  
Distribution Network ◽  
Operating Cost ◽  
Test System ◽  
Optimal Placement ◽  
Fault Indicator

Traditional fault indicators based on 3G and 4G cannot send out fault-generated information if the distribution lines are located in the system across remote mountainous or forest areas. Hence, power distribution systems in rural areas only rely on patrol to find faults currently, which wastes time and lacks efficiency. With the development of the Internet of things (IoT) technology, some studies have suggested combining the long-range (LoRa) and the narrowband Internet of Things (NB-IoT) technologies to increase the data transmission distance and reduce the self-built communication system operating cost. In this paper, we propose an optimal configuration scheme for novel intelligent IoT-based fault indicators. The proposed fault indicator combines LoRa and NB-IoT communication technologies with a long communication distance to achieve minimum power consumption and high-efficiency maintenance. Under this given cyber network and physical power distribution network, the whole fault location process depends on the fault indicator placement and the deployment of the communication network. The overall framework and the working principle of the fault indicators based on LoRa and NB-IoT are first illustrated to establish the optimization placement model of the proposed novel IoT-based fault indicator. Secondly, an optimization placement method has been proposed to obtain the optimal number of the acquisition and collection units of the fault indicators, as well as their locations. In the proposed method, the attenuation of the communication network and the power-supply reliability have been specially considered in the fault location process under the investment restrictions of the fault indicators. The effectiveness of the proposed method has been validated by the analysis results in an IEEE Roy Billinton Test System (IEEE-RBTS) typical system.

Dynamic Load Model using PSO-Based Parameter Estimation

2011 ◽  
Vol 131 (7) ◽  
pp. 557-566 ◽  
Author(s):  
Hisao Taoka ◽  
Junya Matsuki ◽  
Michiya Tomoda ◽  
Yasuhiro Hayashi ◽  
Yoshio Yamagishi ◽  
...  
Keyword(s):  
Parameter Estimation ◽  
Dynamic Load ◽  
Load Model ◽  
Dynamic Load Model

scholarly journals A Flexible Load Control Strategy for Distribution Network to Reduce the Line Losses and to Eliminate the Transmission Congestion

2017 ◽  
Vol 2017 ◽  
pp. 1-16 ◽  
Author(s):  
Beibei Wang ◽  
Xiaoqing Hu ◽  
Peifeng Shen ◽  
Wenlu Ji ◽  
Yang Cao ◽  
...  
Keyword(s):  
Power Distribution ◽  
Distribution Systems ◽  
Renewable Energy Sources ◽  
Distribution Network ◽  
Test System ◽  
Operating Conditions ◽  
Load Control ◽  
Transmission Congestion ◽  
Heavy Load ◽  
Flexible Load

There are many uncertain factors in the modern distribution network, including the access of renewable energy sources and the heavy load level. The existence of these factors has brought challenges to the stability of the power distribution network, as well as increasing the risk of exceeding transmission capacity of distribution lines. The appearance of flexible load control technology provides a new idea to solve the above problems. Air conditioners (ACs) account for a great proportion of all loads. In this paper, the model of dispatching AC loads in the regional power grid is constructed, and the direct load control (DLC) method is adopted to reduce the load of ACs. An improved tabu search technique is proposed to solve the problem of network dispatch in distribution systems in order to reduce the resistive line losses and to eliminate the transmission congestion in lines under normal operating conditions. The optimal node solution is obtained to find the best location and reduction capacity of ACs for load control. To demonstrate the validity and effectiveness of the proposed method, a test system is studied. The numerical results are also given in this article, which reveal that the proposed method is promising.

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