Pub Date : 2018-09-01DOI: 10.1109/TDC-LA.2018.8511688
U. C. P. Júnior, A. R. A. Manito, G. Rocha, F. P. Monteiro, Carminda C. Moura Moura de Carvalho, U. Bezerra, Maria Emília Lima de Tostes
This work shows the evaluation of the harmonic contribution at the common coupling point (CCP) of the electric network of the Federal University of Pará (UFPA), which connects four main feeders that have linear and nonlinear loads connected along them. In this article, emphasis is placed on the CCP with the local electric utility and the four electric power feeders of the campus, in order to evaluate the harmonic contribution of each feeder in the CCP of the university, using linear regression techniques and computational intelligences such as artificial neural networks and regression trees. The results of the three analyzes are compared to each other, in order to classify the feeders in relation to their respective impact on the campus electrical grid. The analysis results show that one of the feeders has a more significant impact on the voltage distortion at the CCP of the university, giving subsidies for a more efficient mitigating action.
{"title":"Evaluation of Harmonic Contribution Impacts in the Electric Grid Through Linear Regression, Artificial Neural Networks and Regression tree","authors":"U. C. P. Júnior, A. R. A. Manito, G. Rocha, F. P. Monteiro, Carminda C. Moura Moura de Carvalho, U. Bezerra, Maria Emília Lima de Tostes","doi":"10.1109/TDC-LA.2018.8511688","DOIUrl":"https://doi.org/10.1109/TDC-LA.2018.8511688","url":null,"abstract":"This work shows the evaluation of the harmonic contribution at the common coupling point (CCP) of the electric network of the Federal University of Pará (UFPA), which connects four main feeders that have linear and nonlinear loads connected along them. In this article, emphasis is placed on the CCP with the local electric utility and the four electric power feeders of the campus, in order to evaluate the harmonic contribution of each feeder in the CCP of the university, using linear regression techniques and computational intelligences such as artificial neural networks and regression trees. The results of the three analyzes are compared to each other, in order to classify the feeders in relation to their respective impact on the campus electrical grid. The analysis results show that one of the feeders has a more significant impact on the voltage distortion at the CCP of the university, giving subsidies for a more efficient mitigating action.","PeriodicalId":267301,"journal":{"name":"2018 IEEE PES Transmission & Distribution Conference and Exhibition - Latin America (T&D-LA)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116939048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/TDC-LA.2018.8511641
W. Gil-González, A. Garcés, A. Escobar-Mejía, Oscar Danil Montoya
In this paper an interconnection and damping assignment passivity-based control (IDA-PBC) applied to the hydro-turbine governing systems (HTGS) is proposed to regulate the relative deviation of turbine speed in single machine infinite bus system. The passivity-based control (PBC) theory is selected because in the open-loop the HTGS has a port-Hamiltonian (pH) structure. The PBC theory takes advantage of the pH structure of the open-loop dynamical system to design a general control law, which preserves the passive structure in closedloop via interconnection and damping reassignment. Additionally, the PBC theory guarantees globally asymptotically stability in the sense of Lyapunov for the close-loop dynamical system. Time-domain simulations demonstrate the robustness and proper performance of the proposed methodology applied to the HTGS under different operative conditions.
{"title":"Passivity-Based Control for Hydro-Turbine Governing Systems","authors":"W. Gil-González, A. Garcés, A. Escobar-Mejía, Oscar Danil Montoya","doi":"10.1109/TDC-LA.2018.8511641","DOIUrl":"https://doi.org/10.1109/TDC-LA.2018.8511641","url":null,"abstract":"In this paper an interconnection and damping assignment passivity-based control (IDA-PBC) applied to the hydro-turbine governing systems (HTGS) is proposed to regulate the relative deviation of turbine speed in single machine infinite bus system. The passivity-based control (PBC) theory is selected because in the open-loop the HTGS has a port-Hamiltonian (pH) structure. The PBC theory takes advantage of the pH structure of the open-loop dynamical system to design a general control law, which preserves the passive structure in closedloop via interconnection and damping reassignment. Additionally, the PBC theory guarantees globally asymptotically stability in the sense of Lyapunov for the close-loop dynamical system. Time-domain simulations demonstrate the robustness and proper performance of the proposed methodology applied to the HTGS under different operative conditions.","PeriodicalId":267301,"journal":{"name":"2018 IEEE PES Transmission & Distribution Conference and Exhibition - Latin America (T&D-LA)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121924758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/TDC-LA.2018.8511751
J. Blancas, Julien Noel
In this paper, fuzzy logic (FL) is applied to the problem of short-term load forecasting (next day) in electrical power systems. To achieve this, it is necessary to select the historical data to be used and pre-process them using the c-means method, grouping them according to power levels (MW) to define the number of membership functions (MFs) to the fuzzy system, which is very important for the calculation of the lowest forecast error; finally, the historical data are entered into the fuzzy system implemented in MATLAB. This methodology is applied to predict the daily electrical load (demand) of the Peruvian Electrical System using the historical data of the actual demand executed for the study period and by calculating the MAPE error. It is shown that the FL offers better results than the conventional methodology for the forecast of the electrical load.
{"title":"Short-Term Load Forecasting Using Fuzzy Logic","authors":"J. Blancas, Julien Noel","doi":"10.1109/TDC-LA.2018.8511751","DOIUrl":"https://doi.org/10.1109/TDC-LA.2018.8511751","url":null,"abstract":"In this paper, fuzzy logic (FL) is applied to the problem of short-term load forecasting (next day) in electrical power systems. To achieve this, it is necessary to select the historical data to be used and pre-process them using the c-means method, grouping them according to power levels (MW) to define the number of membership functions (MFs) to the fuzzy system, which is very important for the calculation of the lowest forecast error; finally, the historical data are entered into the fuzzy system implemented in MATLAB. This methodology is applied to predict the daily electrical load (demand) of the Peruvian Electrical System using the historical data of the actual demand executed for the study period and by calculating the MAPE error. It is shown that the FL offers better results than the conventional methodology for the forecast of the electrical load.","PeriodicalId":267301,"journal":{"name":"2018 IEEE PES Transmission & Distribution Conference and Exhibition - Latin America (T&D-LA)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116101880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/TDC-LA.2018.8511709
Cristina J. Trávez, Fabián E. Pérez, F. Quilumba
Conventionally, for power protective relay applications, overcurrent relaying is made directional by use of two inputs, the operating current and a reference or polarizing quantity (either voltage or current) that does not change with fault location. This work presents a pattern model, which is capable of providing the characteristic of directionality to a nondirectional overcurrent relay that is installed on a transmission line by monitoring the current signal only, without the reference signal. In addition, a second model which has the ability to identify the type of fault occurred in the protected line is presented. The electrical test system was implemented in ATP/EMTP program, and simulations were driven by a MATLAB program for several short-circuit fault types at different distances. The simulation results constitute the database. These files were processed and analyzed on MATLAB platform mainly using two mathematical tools: Wavelet Transform and Support Vector Machine. Finally, a graphical user interface was implemented for academic purposes, so the user can easily and didactically appreciate the developed methodology, as well as its effectiveness.
{"title":"Wavelet Transform and Support Vector Machine- Based Current-Only Directional Overcurrent Relay for Transmission Line Protection","authors":"Cristina J. Trávez, Fabián E. Pérez, F. Quilumba","doi":"10.1109/TDC-LA.2018.8511709","DOIUrl":"https://doi.org/10.1109/TDC-LA.2018.8511709","url":null,"abstract":"Conventionally, for power protective relay applications, overcurrent relaying is made directional by use of two inputs, the operating current and a reference or polarizing quantity (either voltage or current) that does not change with fault location. This work presents a pattern model, which is capable of providing the characteristic of directionality to a nondirectional overcurrent relay that is installed on a transmission line by monitoring the current signal only, without the reference signal. In addition, a second model which has the ability to identify the type of fault occurred in the protected line is presented. The electrical test system was implemented in ATP/EMTP program, and simulations were driven by a MATLAB program for several short-circuit fault types at different distances. The simulation results constitute the database. These files were processed and analyzed on MATLAB platform mainly using two mathematical tools: Wavelet Transform and Support Vector Machine. Finally, a graphical user interface was implemented for academic purposes, so the user can easily and didactically appreciate the developed methodology, as well as its effectiveness.","PeriodicalId":267301,"journal":{"name":"2018 IEEE PES Transmission & Distribution Conference and Exhibition - Latin America (T&D-LA)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123802178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/TDC-LA.2018.8511773
Luis F. Ugarte, Felipe M. Laburu, Thiago R. Fernes, M. D. de Almeida
The integrated solutions for the monitoring and control of electrical systems provide the conditions for the development of state estimation and its applications for distribution systems. The Branch Current Based State Estimator (BCBSE) is an interesting alternative for distribution systems, as it can present a constant Gain matrix, which significantly reduces the computational burden of the state estimation process. This paper assesses the BCBSE under fault conditions in order to verify its accuracy and robustness as the main core of an approach dedicated to fault location in distributions systems. The studies performed on the IEEE 13–bus test feeder include single– and three-phase faults for different sets of measurements and fault resistances. Results indicate that the BCBSE is accurate and robust enough even for systems under fault conditions.
{"title":"Assessing the Branch Current Based State Estimator under Fault Conditions","authors":"Luis F. Ugarte, Felipe M. Laburu, Thiago R. Fernes, M. D. de Almeida","doi":"10.1109/TDC-LA.2018.8511773","DOIUrl":"https://doi.org/10.1109/TDC-LA.2018.8511773","url":null,"abstract":"The integrated solutions for the monitoring and control of electrical systems provide the conditions for the development of state estimation and its applications for distribution systems. The Branch Current Based State Estimator (BCBSE) is an interesting alternative for distribution systems, as it can present a constant Gain matrix, which significantly reduces the computational burden of the state estimation process. This paper assesses the BCBSE under fault conditions in order to verify its accuracy and robustness as the main core of an approach dedicated to fault location in distributions systems. The studies performed on the IEEE 13–bus test feeder include single– and three-phase faults for different sets of measurements and fault resistances. Results indicate that the BCBSE is accurate and robust enough even for systems under fault conditions.","PeriodicalId":267301,"journal":{"name":"2018 IEEE PES Transmission & Distribution Conference and Exhibition - Latin America (T&D-LA)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125133099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/TDC-LA.2018.8511696
Renato Grigoletto De Biase, J. Jardini, T. An
This paper presents the study of reliability in a high voltage direct current grid with wind power generator and VSC. The analysis is made by simulating a benchmark model proposed at the CIGRE in normal operation and under outage conditions of the: AC line, DC pole and VSC pole.
{"title":"Reliability Study of HVDC Grid with Renewable Generation and VSC Converters","authors":"Renato Grigoletto De Biase, J. Jardini, T. An","doi":"10.1109/TDC-LA.2018.8511696","DOIUrl":"https://doi.org/10.1109/TDC-LA.2018.8511696","url":null,"abstract":"This paper presents the study of reliability in a high voltage direct current grid with wind power generator and VSC. The analysis is made by simulating a benchmark model proposed at the CIGRE in normal operation and under outage conditions of the: AC line, DC pole and VSC pole.","PeriodicalId":267301,"journal":{"name":"2018 IEEE PES Transmission & Distribution Conference and Exhibition - Latin America (T&D-LA)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125292296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/TDC-LA.2018.8511758
H. Cardenas, Lei Zhang, Julien Noel
Modular Multilevel Converter (MMC) HVDC system has become more attractive to apply for medium or high power conversion system due to its highly modularity, scalable features and excellent output voltage. Unlike the traditional LCC technology, MMC does not depend on the AC system to which is connected making this technology appropriate for active and also passive systems. Therefore, significant research has been conducted for dealing with challenges of its modeling and simulation. Detailed models of it with typical two orders of magnitude of switches dramatically increase the computational difficulty. Therefore, different more efficient modeling methods have been developed and proposed. This paper presents the detailed step-by-step modeling approach by using average value model(AVM) of MMC and its controller in PSCAD/EMTDC simulation software. Generic blocks in the software are used. Then a dual hybrid in-feed HVDC transmission system (employing the VSC-HVDC link connected in parallel with an LCC-HVDC link) is established to validate the model and emphasize the leverage of VSC-HVDC to prevent LCC-HVDC transmission commutation failure by providing reactive power to the latter. Both steady state and fault analysis of the hybrid dual in-feed HVDC transmission system has been simulated and discussed.
模块化多电平变换器(Modular multi - level Converter, MMC) HVDC系统由于其高度模块化、可扩展性和优异的输出电压等特点，在中大功率转换系统中越来越受欢迎。与传统的LCC技术不同，MMC不依赖于所连接的交流系统，因此该技术适用于有源和无源系统。因此，针对其建模和仿真的挑战进行了大量的研究。典型的两个数量级开关的详细模型大大增加了计算难度。因此，人们开发并提出了各种更有效的建模方法。本文详细介绍了在PSCAD/EMTDC仿真软件中利用MMC及其控制器的平均值模型(AVM)逐步建模的方法。使用软件中的通用块。然后，为了验证模型，建立了双馈混合HVDC输电系统(采用vdc -HVDC链路并联LCC-HVDC链路)，强调了vdc -HVDC通过向LCC-HVDC提供无功功率来防止LCC-HVDC输电换相失败的作用。对混合式双馈直流输电系统的稳态分析和故障分析进行了仿真和讨论。
{"title":"Modeling, Simulation and Application of Modular Multilevel Converter in Hybrid High Voltage Direct Current Transmission System","authors":"H. Cardenas, Lei Zhang, Julien Noel","doi":"10.1109/TDC-LA.2018.8511758","DOIUrl":"https://doi.org/10.1109/TDC-LA.2018.8511758","url":null,"abstract":"Modular Multilevel Converter (MMC) HVDC system has become more attractive to apply for medium or high power conversion system due to its highly modularity, scalable features and excellent output voltage. Unlike the traditional LCC technology, MMC does not depend on the AC system to which is connected making this technology appropriate for active and also passive systems. Therefore, significant research has been conducted for dealing with challenges of its modeling and simulation. Detailed models of it with typical two orders of magnitude of switches dramatically increase the computational difficulty. Therefore, different more efficient modeling methods have been developed and proposed. This paper presents the detailed step-by-step modeling approach by using average value model(AVM) of MMC and its controller in PSCAD/EMTDC simulation software. Generic blocks in the software are used. Then a dual hybrid in-feed HVDC transmission system (employing the VSC-HVDC link connected in parallel with an LCC-HVDC link) is established to validate the model and emphasize the leverage of VSC-HVDC to prevent LCC-HVDC transmission commutation failure by providing reactive power to the latter. Both steady state and fault analysis of the hybrid dual in-feed HVDC transmission system has been simulated and discussed.","PeriodicalId":267301,"journal":{"name":"2018 IEEE PES Transmission & Distribution Conference and Exhibition - Latin America (T&D-LA)","volume":"230 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123037149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/tdc-la.2018.8511651
Luis Bernardo AÁlvarez, R. Céspedes
Empresas Públicas de Medellín E.S.P. (EPM) is a company with presence in Colombia, Mexico, Chile, Panama, Salvador and Guatemala that operates in the home and related public services sector. Its corporate objective is the provision of electricity generation, transmission, distribution and commercialization services; collection, purification, commercialization and distribution of drinking water; collection and treatment of wastewater and commercialization and distribution of natural gas. furthermore, the company has the capacity to provide waste collection and disposal services. Developing these businesses has resulted in a wide variety of SCADA applications and systems from different manufacturers, architectures, technologies and degrees of obsolescence. Given the size, growth of the company, the critical nature of the services it provides, the variety of the businesses and the number of regions involved, the EPM Group seeks to optimize the operation of its infrastructures, implementing new technologies that allow a centralized multiservice operation using a SCADA platform and advanced market applications. In this context, the EPM Group is developing the Control Center Consolidation Project to update its SCADA technology platform and the associated applications for the operational management of the Electricity, Water and Gas businesses. The resulting architecture seeks to satisfy the current and growing requirements of EPM’s business in Colombia. This article presents the main conceptual bases on which the design and architecture of the systems that are implemented in the referred project are based.
Empresas Públicas de Medellín E.S.P. (EPM)是一家在哥伦比亚、墨西哥、智利、巴拿马、萨尔瓦多和危地马拉开展家庭和相关公共服务业务的公司。其公司目标是提供发电、输电、配电和商业化服务;饮用水的收集、净化、商品化和分配;废水的收集和处理以及天然气的商业化和分销。此外，公司有能力提供废物收集和处理服务。开发这些业务导致了来自不同制造商、架构、技术和过时程度的各种各样的SCADA应用程序和系统。考虑到公司的规模、增长、所提供服务的关键性质、业务的多样性和涉及的地区数量，EPM集团寻求优化其基础设施的运营，实施新技术，允许使用SCADA平台和先进的市场应用进行集中的多服务运营。在此背景下，EPM集团正在开发控制中心整合项目，以更新其SCADA技术平台和相关应用程序，用于电力、水和天然气业务的运营管理。最终的体系结构旨在满足EPM在哥伦比亚的业务当前和不断增长的需求。本文介绍了在参考项目中实现的系统的设计和体系结构所基于的主要概念基础。
{"title":"Consolidation of EPM Group Control Centers","authors":"Luis Bernardo AÁlvarez, R. Céspedes","doi":"10.1109/tdc-la.2018.8511651","DOIUrl":"https://doi.org/10.1109/tdc-la.2018.8511651","url":null,"abstract":"Empresas Públicas de Medellín E.S.P. (EPM) is a company with presence in Colombia, Mexico, Chile, Panama, Salvador and Guatemala that operates in the home and related public services sector. Its corporate objective is the provision of electricity generation, transmission, distribution and commercialization services; collection, purification, commercialization and distribution of drinking water; collection and treatment of wastewater and commercialization and distribution of natural gas. furthermore, the company has the capacity to provide waste collection and disposal services. Developing these businesses has resulted in a wide variety of SCADA applications and systems from different manufacturers, architectures, technologies and degrees of obsolescence. Given the size, growth of the company, the critical nature of the services it provides, the variety of the businesses and the number of regions involved, the EPM Group seeks to optimize the operation of its infrastructures, implementing new technologies that allow a centralized multiservice operation using a SCADA platform and advanced market applications. In this context, the EPM Group is developing the Control Center Consolidation Project to update its SCADA technology platform and the associated applications for the operational management of the Electricity, Water and Gas businesses. The resulting architecture seeks to satisfy the current and growing requirements of EPM’s business in Colombia. This article presents the main conceptual bases on which the design and architecture of the systems that are implemented in the referred project are based.","PeriodicalId":267301,"journal":{"name":"2018 IEEE PES Transmission & Distribution Conference and Exhibition - Latin America (T&D-LA)","volume":"2014 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132688343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/TDC-LA.2018.8511699
M. Colorado, Manfred F. Bedriñan
Determining generation units that provide security to the system under normal operating conditions and contingencies is a task of the planner to avoid emergencies. It is more critical when the system is operated with local areas with reduced voltage support. This work presents a practical method based on the monitoring of the security of the system in points of its load duration curve to determine the generation units to beput into service by reliability, named ReliaUility Must Run (RMR) units. For this, a Security Constrained Optimal Power Flow (SCOPF) is formulated as economic dispatch and solved using genetic algorithms (GA), which incorporates constraints such as voltage limits in load Uus, reactive power limits in generation and power flows limits in the lines. Likewise, power dispatch ofthe RMR units to cover the local area for non-severe contingencies and load shedding to avoid the collapse in this area under severe contingencies is required. A payment mechanism for reactive power support is included through a reactive power band of generators.
确定在正常运行条件和突发事件下为系统提供安全保障的发电机组是规划人员避免突发事件的任务。当系统在电压支持较低的局部区域运行时，这一点更为关键。本文提出了一种基于负荷持续时间曲线点上系统安全性监测的实用方法，即可靠性必须运行(reliability Must Run, RMR)机组。为此，将安全约束最优潮流(SCOPF)表述为经济调度，并使用遗传算法(GA)进行求解，该算法包含负载u中的电压限制、发电中的无功限制和线路中的潮流限制等约束。同样，对于非严重突发事件，RMR机组也需要进行电力调度，以覆盖局部区域，同时也需要进行减载，以避免该区域在严重突发事件下崩溃。通过发电机的无功功率带包括无功功率支持的支付机制。
{"title":"Planning of must-run units and optimal load shedding to maintain the security in power systems","authors":"M. Colorado, Manfred F. Bedriñan","doi":"10.1109/TDC-LA.2018.8511699","DOIUrl":"https://doi.org/10.1109/TDC-LA.2018.8511699","url":null,"abstract":"Determining generation units that provide security to the system under normal operating conditions and contingencies is a task of the planner to avoid emergencies. It is more critical when the system is operated with local areas with reduced voltage support. This work presents a practical method based on the monitoring of the security of the system in points of its load duration curve to determine the generation units to beput into service by reliability, named ReliaUility Must Run (RMR) units. For this, a Security Constrained Optimal Power Flow (SCOPF) is formulated as economic dispatch and solved using genetic algorithms (GA), which incorporates constraints such as voltage limits in load Uus, reactive power limits in generation and power flows limits in the lines. Likewise, power dispatch ofthe RMR units to cover the local area for non-severe contingencies and load shedding to avoid the collapse in this area under severe contingencies is required. A payment mechanism for reactive power support is included through a reactive power band of generators.","PeriodicalId":267301,"journal":{"name":"2018 IEEE PES Transmission & Distribution Conference and Exhibition - Latin America (T&D-LA)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114438252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-01DOI: 10.1109/TDC-LA.2018.8511801
Joelson Lopes da Paixão, A. Abaide, J. Rigodanzo, J. Sausen
Currently, in Brazil and in the world, there has been a great diversification of sources that make up the energy matrix. Efforts are being made to replace polluting sources by clean sources, such as: wind, solar, biomass, etc. As there is already a resolution and government policies that enable and encourage the entry of distributed generation (DG), its participation in generation tends to increase continuously. With a favorable scenario of DGs, studying the potential of its entry into a region, as well as assess the impact that this would cause in the distribution system, it is necessary to prevent and perform more reliable planning. Then the focus of this article is to perform an analysis of how to behave to a dealership network, in southern Brazil, whereas photovoltaic generation entries in your distribution network. That is, simulations will be done during periods, such as weekdays, to examine the curves of loads of feeders, mains voltage profiles, among other dimensions to find out if there were problems on the network, such as: periods of overload, under voltage or overvoltage, etc. The modeling of the elements that make up the network, loads and simulations are developed in OpenDSS software. For the definition of the installed power in each DG, as well as of the daily profiles of generation, are used typical curves of solar generation and also curves generated from measurements of systems of tests installed in the region. This study verifies how the distribution system of the concessionaire behaves with the insertion of several units of DG. Knowing that the generation of solar energy is variable and difficult to predict, the generation curves adopted for simulations contemplate the most probable scenarios of occurrence. The approach taken in this work is promising and necessary for the concessionaire to be able to carry out more reliable plans in the short, medium and long term. In addition, it also allows identifying which investments in distribution networks must be made to adapt them to this new scenario that has been established in the electric sector.
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