Pub Date : 2017-11-01DOI: 10.1109/APPEEC.2017.8308962
Nicholas Liew Long Guang, T. Logenthiran, K. Abidi
With technology evolving at a drastic rate, our lives have been integrated with them. Countries have taken a step into a new era of Smart Cities enabling technology to increase the quality of life. This project delves into the study ad understanding of the Internet of Things (IoT) concept and how it plays a part in Singapore's Smart Nation initiative, specifically in a Smart Home. A Smart Home prototype model was build using two Arduino boards and incorporates various sensors such as a lux sensor, a temperature and humidity sensor and a PIR motion sensor. These sensors allow several devices that are connected in the model to function according to external inputs from the environment to decrease the total energy consumption. Coupled with these sensors, are a pair of Xbee modules to transmit a desired power value keyed in via a keypad between the Arduino boards to limit the total energy in of the devices in the model. A simulation model of a Smart Home network was also created using Cooja simulator running on Ubuntu to better facilitate the understanding of the IoT. It portrays four Tmote sensors that is connected to an Area Border Router (ABR) using the RPL protocol. This connection gives an external IPv6 value to the sensor nodes allowing their data to be access through the border router.
{"title":"Application of Internet of Things (IoT) for home energy management","authors":"Nicholas Liew Long Guang, T. Logenthiran, K. Abidi","doi":"10.1109/APPEEC.2017.8308962","DOIUrl":"https://doi.org/10.1109/APPEEC.2017.8308962","url":null,"abstract":"With technology evolving at a drastic rate, our lives have been integrated with them. Countries have taken a step into a new era of Smart Cities enabling technology to increase the quality of life. This project delves into the study ad understanding of the Internet of Things (IoT) concept and how it plays a part in Singapore's Smart Nation initiative, specifically in a Smart Home. A Smart Home prototype model was build using two Arduino boards and incorporates various sensors such as a lux sensor, a temperature and humidity sensor and a PIR motion sensor. These sensors allow several devices that are connected in the model to function according to external inputs from the environment to decrease the total energy consumption. Coupled with these sensors, are a pair of Xbee modules to transmit a desired power value keyed in via a keypad between the Arduino boards to limit the total energy in of the devices in the model. A simulation model of a Smart Home network was also created using Cooja simulator running on Ubuntu to better facilitate the understanding of the IoT. It portrays four Tmote sensors that is connected to an Area Border Router (ABR) using the RPL protocol. This connection gives an external IPv6 value to the sensor nodes allowing their data to be access through the border router.","PeriodicalId":247669,"journal":{"name":"2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)","volume":"403 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131892255","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 : 2017-11-01DOI: 10.1109/APPEEC.2017.8308985
Priyabrata Shaw, M. Veerachary
In this paper, a digital single-loop voltage-mode controller (VMC) is designed for the non-isolated fifth-order boost converter, which exhibits low source current ripple. A detailed analysis is performed, in continuous inductor current mode of operation, to obtain the design expressions and relevant differential equations. Later on, a state-space modeling approach is extended to formulate the discrete-time models. A pole placement technique is utilized in the digital controller design to achieve required stability margins. The robustness of the closed-loop controlled system is analyzed using modulus margin (MM) concept. Simulation studies have been conducted to validate the steady-state and transient performances of the digital VMC. To confirm the analytical results, a 12 to 48 V, 25 Watt, 100 kHz prototype is developed and the closed-loop system (CLS) stability is verified for a given range of parameter uncertainties. Both simulation and experimental results depict the efficacy of the controller against source and load disturbances.
{"title":"Analysis and voltage-mode controller design for a single-switch fifth-order boost converter","authors":"Priyabrata Shaw, M. Veerachary","doi":"10.1109/APPEEC.2017.8308985","DOIUrl":"https://doi.org/10.1109/APPEEC.2017.8308985","url":null,"abstract":"In this paper, a digital single-loop voltage-mode controller (VMC) is designed for the non-isolated fifth-order boost converter, which exhibits low source current ripple. A detailed analysis is performed, in continuous inductor current mode of operation, to obtain the design expressions and relevant differential equations. Later on, a state-space modeling approach is extended to formulate the discrete-time models. A pole placement technique is utilized in the digital controller design to achieve required stability margins. The robustness of the closed-loop controlled system is analyzed using modulus margin (MM) concept. Simulation studies have been conducted to validate the steady-state and transient performances of the digital VMC. To confirm the analytical results, a 12 to 48 V, 25 Watt, 100 kHz prototype is developed and the closed-loop system (CLS) stability is verified for a given range of parameter uncertainties. Both simulation and experimental results depict the efficacy of the controller against source and load disturbances.","PeriodicalId":247669,"journal":{"name":"2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134174132","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 : 2017-11-01DOI: 10.1109/APPEEC.2017.8308970
D. Kumar, B. Nandan, H. D. Mathur, S. Bhanot
Frequency regulation in MG using conventional PID controllers becomes more challenging in the presence of stochastic load and uncertainty in system parameters caused by dynamic perturbation. So, there is a need for a robust controller with acceptable performance and stability for regulating the frequency in MG. The dynamic perturbations include changes in inertia constant and damping coefficient of the power system, which directly affect the frequency of the MG. In this paper, structured Hm synthesis has been done for robust frequency control in islanded MG. The sources used in MG for compensating the load demand are fuel cell, diesel engine generator and microturbine. The robustness and performance of Hm based controller is validated in the presence of parametric uncertainty and load disturbance caused by stochastic nature of load. The synthesized Hm based controller is tested for robust stability and performance against ± 50% perturbation of inertia constant and damping coefficient of power system. Simulation results of complete system is also validated with hardware using dSPACE 1104 and control desk.
{"title":"Robust controller synthesis for frequency regulation in islanded microgrid","authors":"D. Kumar, B. Nandan, H. D. Mathur, S. Bhanot","doi":"10.1109/APPEEC.2017.8308970","DOIUrl":"https://doi.org/10.1109/APPEEC.2017.8308970","url":null,"abstract":"Frequency regulation in MG using conventional PID controllers becomes more challenging in the presence of stochastic load and uncertainty in system parameters caused by dynamic perturbation. So, there is a need for a robust controller with acceptable performance and stability for regulating the frequency in MG. The dynamic perturbations include changes in inertia constant and damping coefficient of the power system, which directly affect the frequency of the MG. In this paper, structured Hm synthesis has been done for robust frequency control in islanded MG. The sources used in MG for compensating the load demand are fuel cell, diesel engine generator and microturbine. The robustness and performance of Hm based controller is validated in the presence of parametric uncertainty and load disturbance caused by stochastic nature of load. The synthesized Hm based controller is tested for robust stability and performance against ± 50% perturbation of inertia constant and damping coefficient of power system. Simulation results of complete system is also validated with hardware using dSPACE 1104 and control desk.","PeriodicalId":247669,"journal":{"name":"2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)","volume":"278 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134226220","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 : 2017-11-01DOI: 10.1109/APPEEC.2017.8308977
Poonam Jayal, G. Bhuvaneswari
This paper presents the state of the art closed-loop control technique namely the Field Oriented Control (FOC) for a Permanent Magnet Synchronous Motor (PMSM) drive. An effective model implementing FOC with field-weakening control is presented to analyze and control the performance of a PMSM drive over a wide range of speeds including the constant torque and constant power regions of operation. A sinusoidal pulse width modulated (SPWM) three-phase voltage source inverter (VSI) fed low-power surface-mounted PMSM (SMPMSM) drive system is modeled and simulated in MATLAB/Simulink environment. It is analyzed for various dynamic operating conditions for speeds ranging from as low as 100 rpm to 3500 rpm. The maximum speed attainable in field-weakening region is found to be dependent on the machine parameters. This is further validated by the simulation results of the drive under investigation.
{"title":"Performance analysis and control of permanent magnet synchronous motor drive over a wide speed range","authors":"Poonam Jayal, G. Bhuvaneswari","doi":"10.1109/APPEEC.2017.8308977","DOIUrl":"https://doi.org/10.1109/APPEEC.2017.8308977","url":null,"abstract":"This paper presents the state of the art closed-loop control technique namely the Field Oriented Control (FOC) for a Permanent Magnet Synchronous Motor (PMSM) drive. An effective model implementing FOC with field-weakening control is presented to analyze and control the performance of a PMSM drive over a wide range of speeds including the constant torque and constant power regions of operation. A sinusoidal pulse width modulated (SPWM) three-phase voltage source inverter (VSI) fed low-power surface-mounted PMSM (SMPMSM) drive system is modeled and simulated in MATLAB/Simulink environment. It is analyzed for various dynamic operating conditions for speeds ranging from as low as 100 rpm to 3500 rpm. The maximum speed attainable in field-weakening region is found to be dependent on the machine parameters. This is further validated by the simulation results of the drive under investigation.","PeriodicalId":247669,"journal":{"name":"2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132595647","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 : 2017-11-01DOI: 10.1109/APPEEC.2017.8308954
C. Jamroen, Natchanan Kesorn, A. Pichetjamroen, S. Dechanupaprittha
This paper aims to analyze the impact of communication delays on the performance of Plug-in electric vehicles (PEVs) charging power control for frequency stabilization based on Wide-Area Monitoring and Control (WAMC). Phasor Measurement Unit (PMU) is utilized in data acquisition for achieving the input signal of PEVs charging power control. In practical integration aspect, the communication delays are assessed for obtaining the impact of the PEVs charging power control consisting of synchrophasor data gathering delay, synchrophasor data transmission delay, synchrophasor data aligning in Phasor Data Concentrator (PDC), application algorithm delay and control signal transmission delay from the control center to the local PEVs. The multi-area remote microgrid is performed and simulated using DIgSILENT Powerfactory simulation software. The PEVs charging power controllers are integrated at particular locations in the microgrid with different PEVs penetration levels. The multi-area remote microgrid is fully considered the dynamic behaviors in power system. Furthermore, Photovoltaic (PV) generations are integrated to consider the intermittent characteristic of renewable energy source (RES) using synthesized solar radiation. This paper also attains the dynamic of load characteristic according to consumers demand. The simulation study is analyzed with different communication delays for receiving the effect on the controller. Simulation results indicate the impact of some communication delays on each PEVs charging power control in the remote microgrid. The results also reveal the performance of the PEVs charging power control for stabilizing system frequency under the particular condition.
{"title":"Impact of communication delays on PEVs charging power control for frequency stabilization in remote microgrid","authors":"C. Jamroen, Natchanan Kesorn, A. Pichetjamroen, S. Dechanupaprittha","doi":"10.1109/APPEEC.2017.8308954","DOIUrl":"https://doi.org/10.1109/APPEEC.2017.8308954","url":null,"abstract":"This paper aims to analyze the impact of communication delays on the performance of Plug-in electric vehicles (PEVs) charging power control for frequency stabilization based on Wide-Area Monitoring and Control (WAMC). Phasor Measurement Unit (PMU) is utilized in data acquisition for achieving the input signal of PEVs charging power control. In practical integration aspect, the communication delays are assessed for obtaining the impact of the PEVs charging power control consisting of synchrophasor data gathering delay, synchrophasor data transmission delay, synchrophasor data aligning in Phasor Data Concentrator (PDC), application algorithm delay and control signal transmission delay from the control center to the local PEVs. The multi-area remote microgrid is performed and simulated using DIgSILENT Powerfactory simulation software. The PEVs charging power controllers are integrated at particular locations in the microgrid with different PEVs penetration levels. The multi-area remote microgrid is fully considered the dynamic behaviors in power system. Furthermore, Photovoltaic (PV) generations are integrated to consider the intermittent characteristic of renewable energy source (RES) using synthesized solar radiation. This paper also attains the dynamic of load characteristic according to consumers demand. The simulation study is analyzed with different communication delays for receiving the effect on the controller. Simulation results indicate the impact of some communication delays on each PEVs charging power control in the remote microgrid. The results also reveal the performance of the PEVs charging power control for stabilizing system frequency under the particular condition.","PeriodicalId":247669,"journal":{"name":"2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)","volume":"52 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120836905","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 : 2017-11-01DOI: 10.1109/APPEEC.2017.8308902
C. Zhai, Zhiwen Zhang, L. Luo, Xin Sun, Shubo Sun
In this paper, a novel HVDC system is proposed for using Shunt Capacitance Commutated Converter (SCCC), and analysis of work and wiring method are given. The basic idea of the SCCC is connect the capacitors in parallel between the converter transformers and the converters at the valve winding. The parallel capacitor is used to compensate for the vast majority of the inductive reactive power which can be required during the operation time. It is proved that the SCCC not only has the advantages of reducing the failure chance in commutation of the inverter, but also can makes the capacity of the converter transformer be utilized fully. The 500 kV HVDC monopole operation system about Huizhou City, Guangdong Province Echeng as an example, conducted by simulation of the system software (MATLAB). Gotting the AC side voltage and current waveforms and the DC side voltage and current waveforms during the operation of the SCCC. It is shown that the SCCC can not only overcomes the inherent defects of the traditional HVDC converter, but also can optimizes the operation state of the converter transformer and the whole systems.
{"title":"Characteristic analysis of HVDC system with shunt capacitance commutated converter","authors":"C. Zhai, Zhiwen Zhang, L. Luo, Xin Sun, Shubo Sun","doi":"10.1109/APPEEC.2017.8308902","DOIUrl":"https://doi.org/10.1109/APPEEC.2017.8308902","url":null,"abstract":"In this paper, a novel HVDC system is proposed for using Shunt Capacitance Commutated Converter (SCCC), and analysis of work and wiring method are given. The basic idea of the SCCC is connect the capacitors in parallel between the converter transformers and the converters at the valve winding. The parallel capacitor is used to compensate for the vast majority of the inductive reactive power which can be required during the operation time. It is proved that the SCCC not only has the advantages of reducing the failure chance in commutation of the inverter, but also can makes the capacity of the converter transformer be utilized fully. The 500 kV HVDC monopole operation system about Huizhou City, Guangdong Province Echeng as an example, conducted by simulation of the system software (MATLAB). Gotting the AC side voltage and current waveforms and the DC side voltage and current waveforms during the operation of the SCCC. It is shown that the SCCC can not only overcomes the inherent defects of the traditional HVDC converter, but also can optimizes the operation state of the converter transformer and the whole systems.","PeriodicalId":247669,"journal":{"name":"2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121244669","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 : 2017-11-01DOI: 10.1109/APPEEC.2017.8309007
R. Nair, G. Narayanan
Sensorless estimation of rotor speed and position has numerous advantages in terms of maintenance, cost, robustness and cabling requirements. The existing Model Reference Adaptive System (MRAS) observer considers the cross-product of estimated and actual rotor current vectors as the error input to the PI controller. This results in a non linear plant model, necessitating the use of small signal analysis for controller design. The modified MRAS observer presented here results in a linear plant model, enabling straight-forward design of PI controller and also resulting in improved performance. Simulation and experimental results, presented on a 10-HP Wound Rotor Induction Machine (WRIM), driven by a Squirrel Cage Induction Motor (SCIM) clearly bring out the superior dynamic performance of the modified estimation scheme over the existing scheme. The problem of integrator drift is also addressed in the hardware implementation.
{"title":"Modified model reference adaptive observer for rotor speed and position estimation in wound rotor induction machine","authors":"R. Nair, G. Narayanan","doi":"10.1109/APPEEC.2017.8309007","DOIUrl":"https://doi.org/10.1109/APPEEC.2017.8309007","url":null,"abstract":"Sensorless estimation of rotor speed and position has numerous advantages in terms of maintenance, cost, robustness and cabling requirements. The existing Model Reference Adaptive System (MRAS) observer considers the cross-product of estimated and actual rotor current vectors as the error input to the PI controller. This results in a non linear plant model, necessitating the use of small signal analysis for controller design. The modified MRAS observer presented here results in a linear plant model, enabling straight-forward design of PI controller and also resulting in improved performance. Simulation and experimental results, presented on a 10-HP Wound Rotor Induction Machine (WRIM), driven by a Squirrel Cage Induction Motor (SCIM) clearly bring out the superior dynamic performance of the modified estimation scheme over the existing scheme. The problem of integrator drift is also addressed in the hardware implementation.","PeriodicalId":247669,"journal":{"name":"2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126589167","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 : 2017-11-01DOI: 10.1109/APPEEC.2017.8309019
Yuquan Liu, W. Xia, S. Zheng, Ke Wang, Pengfei Wu, Sidun Fang
It is well known that proper reactive power reserve (RPR) is essential to avoid voltage instability and abnormal voltage. Most literatures limits the maximum supply of generator reactive power output by the maximum loading point. Thus the optimization of RPR usually involves two operating points, i.e. current operating point and maximum loading point. However, extreme differences exist between the statuses of generators at those two operating points and cannot be given in advance. That means current techniques cannot solve optimal RPR model directly. In this paper, a semi-definite programming (SDP) approach for solving optimal RPR model is proposed. Proposed method transforms the solution into iterations and each iteration is an optimal power flow problem solved by SDP. For demonstrating the validity of proposed method, IEEE 118 system in three load scenarios is set as the test case. The results prove the effectiveness and robustness of the proposed method.
{"title":"A semi-definite programming approach for solving optimal reactive power reserve dispatch","authors":"Yuquan Liu, W. Xia, S. Zheng, Ke Wang, Pengfei Wu, Sidun Fang","doi":"10.1109/APPEEC.2017.8309019","DOIUrl":"https://doi.org/10.1109/APPEEC.2017.8309019","url":null,"abstract":"It is well known that proper reactive power reserve (RPR) is essential to avoid voltage instability and abnormal voltage. Most literatures limits the maximum supply of generator reactive power output by the maximum loading point. Thus the optimization of RPR usually involves two operating points, i.e. current operating point and maximum loading point. However, extreme differences exist between the statuses of generators at those two operating points and cannot be given in advance. That means current techniques cannot solve optimal RPR model directly. In this paper, a semi-definite programming (SDP) approach for solving optimal RPR model is proposed. Proposed method transforms the solution into iterations and each iteration is an optimal power flow problem solved by SDP. For demonstrating the validity of proposed method, IEEE 118 system in three load scenarios is set as the test case. The results prove the effectiveness and robustness of the proposed method.","PeriodicalId":247669,"journal":{"name":"2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124593334","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 : 2017-11-01DOI: 10.1109/APPEEC.2017.8308979
R. Senthilkumar
This paper proposes an optimization methodology to estimate the parameters of multilayer earth structure by using the hybrid genetic algorithm and particle swarm optimization. By using four wire Wenner method on the ground is to acquire the experimental apparent resistivity curve. With the measured experimental apparent resistivity, can compute the theoretical apparent resistivity curve and estimate the soil parameters such as a number of layers, thickness of each layer (Nth layer thickness is infinity) and its resistivity. The representation of unknown soil is determined by comparing the closeness of experimental apparent resistivity curve with the theoretical optimized apparent resistivity.
{"title":"Optimization of soil parameters in multiple layers of ground structure","authors":"R. Senthilkumar","doi":"10.1109/APPEEC.2017.8308979","DOIUrl":"https://doi.org/10.1109/APPEEC.2017.8308979","url":null,"abstract":"This paper proposes an optimization methodology to estimate the parameters of multilayer earth structure by using the hybrid genetic algorithm and particle swarm optimization. By using four wire Wenner method on the ground is to acquire the experimental apparent resistivity curve. With the measured experimental apparent resistivity, can compute the theoretical apparent resistivity curve and estimate the soil parameters such as a number of layers, thickness of each layer (Nth layer thickness is infinity) and its resistivity. The representation of unknown soil is determined by comparing the closeness of experimental apparent resistivity curve with the theoretical optimized apparent resistivity.","PeriodicalId":247669,"journal":{"name":"2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121994320","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 : 2017-11-01DOI: 10.1109/APPEEC.2017.8309000
Ramu Srikakulapu, U. Vinatha
Permanent magnet synchronous generator (PMSG) based offshore wind farm is connected to the onshore grid by voltage source converter (VSC) — HVDC link. The wind farm side VSC controls the AC voltage, and grid side VSC controls the reactive power and DC link voltage. This paper presents a non-linear control method for improving the robustness of the controller for VSC-HVDC link. A hybrid controller is designed using sliding mode control (SMC) and proportional-integral (PI) control. Mathematical modeling of the hybrid controller is presented. This hybrid controller has the capability of Fault Ride-Through and transient stability of VSC-HVDC link. This hybrid controller is simulated using the MATLAB/Simulink software and it is observed that the controller provides better performance. Transient stability is ensured by creating a symmetrical fault at the grid side in the simulation.
{"title":"A hybrid controller design for VSC-HVDC transmission system for PMSG based offshore wind farm","authors":"Ramu Srikakulapu, U. Vinatha","doi":"10.1109/APPEEC.2017.8309000","DOIUrl":"https://doi.org/10.1109/APPEEC.2017.8309000","url":null,"abstract":"Permanent magnet synchronous generator (PMSG) based offshore wind farm is connected to the onshore grid by voltage source converter (VSC) — HVDC link. The wind farm side VSC controls the AC voltage, and grid side VSC controls the reactive power and DC link voltage. This paper presents a non-linear control method for improving the robustness of the controller for VSC-HVDC link. A hybrid controller is designed using sliding mode control (SMC) and proportional-integral (PI) control. Mathematical modeling of the hybrid controller is presented. This hybrid controller has the capability of Fault Ride-Through and transient stability of VSC-HVDC link. This hybrid controller is simulated using the MATLAB/Simulink software and it is observed that the controller provides better performance. Transient stability is ensured by creating a symmetrical fault at the grid side in the simulation.","PeriodicalId":247669,"journal":{"name":"2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)","volume":"19 15","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132547127","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}
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