2014 5th Conference on Thermal Power Plants (CTPP)最新文献_第3页

Comparison between effect of coupled and independent electricity and gas infrastructures on electric power networks 耦合与独立的电、气基础设施对电网的影响比较

2014 5th Conference on Thermal Power Plants (CTPP) Pub Date : 2014-06-10 DOI: 10.1109/CTPP.2014.7040694

S. Pazouki, M. Haghifam

引用次数: 0

Lifetime assessment and ratcheting behavior of pressurized pipe 加压管道的寿命评估与棘轮行为

2014 5th Conference on Thermal Power Plants (CTPP) Pub Date : 2014-06-10 DOI: 10.1109/CTPP.2014.7040710

H. Yazdani

引用次数: 0

Detecting and locating turn to turn Fault on layer winding of distribution transformer 配电变压器层绕组匝间故障的检测与定位

2014 5th Conference on Thermal Power Plants (CTPP) Pub Date : 2014-06-10 DOI: 10.1109/CTPP.2014.7040704

H. afkar, A. Vahedi

引用次数: 3

Using SSSC based induction machines for indirect toque control during fault 基于SSSC的异步电机故障转矩间接控制

2014 5th Conference on Thermal Power Plants (CTPP) Pub Date : 2014-06-10 DOI: 10.1109/CTPP.2014.7040711

F. Faradjizadeh, M. Tavakoli, J. Olamaei, E. Afjei

{"title":"Using SSSC based induction machines for indirect toque control during fault","authors":"F. Faradjizadeh, M. Tavakoli, J. Olamaei, E. Afjei","doi":"10.1109/CTPP.2014.7040711","DOIUrl":"https://doi.org/10.1109/CTPP.2014.7040711","url":null,"abstract":"This paper presents a novel control method for an induction machine (IM) connected to the network through the Static Synchronous Series Compensator (SSSC) and parallel capacitor at the IM's terminals. By segregating the operational states into three sequential operational zones namely, normal (0), during-fault (1), and after-fault recovery (2). Each state provides an appropriate controlling process for SSSC to improve the operation of induction machine. In normal operation the goal is to improve the power flow and transient stability. Fault operation deals with rotor acceleration which is decreased by utilizing SSSC in resistive mode. Recovery state employs the Indirect Torque Control (ITC) concept to improve the electro-mechanical stability. Tuning the parameters of the two operational states mentioned above, (1) and (2), modifying the IM's terminal voltage and grid side voltage modification according to Low Voltage Ride-Through (LVRT) limitation is possible. The proposed concept has been proved by time domain simulation in MATLAB power system block sets which shows that suggested method has a more robust operation compared to static synchronous compensator (STATCOM) and less electro-magnetic stresses compared to SSSC without ITC.","PeriodicalId":226320,"journal":{"name":"2014 5th Conference on Thermal Power Plants (CTPP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132976901","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}

引用次数: 0

Comparison of DC-link and matrix converters for wind PM generator in weak grid systems 弱电网风力发电机直流链路变换器与矩阵变换器的比较

2014 5th Conference on Thermal Power Plants (CTPP) Pub Date : 2014-06-10 DOI: 10.1109/CTPP.2014.7040701

M. Asgar, M. Nezamabadi, E. Afjei, A. Siadatan

引用次数: 4

Evaluation of eccentricities faults effects on sensorless operation of Switched Reluctance motors 偏心故障对开关磁阻电机无传感器运行影响的评价

2014 5th Conference on Thermal Power Plants (CTPP) Pub Date : 2014-06-10 DOI: 10.1109/CTPP.2014.7040714

S. Yaghubi, M. Tavakoli, F. Faradjizadeh, E. Afjei

{"title":"Evaluation of eccentricities faults effects on sensorless operation of Switched Reluctance motors","authors":"S. Yaghubi, M. Tavakoli, F. Faradjizadeh, E. Afjei","doi":"10.1109/CTPP.2014.7040714","DOIUrl":"https://doi.org/10.1109/CTPP.2014.7040714","url":null,"abstract":"This paper studies the effects of eccentricities faults (EFs) on sensorless operation of Switched Reluctance motors (SRMs). EFs are among widespread faults in SRMs which make machine airgap uneven and consequently change SRM characteristics such as phase and mutual inductances. One of the most common methods for indirect rotor position estimation is to apply high frequency pulses to idle phases. As phase inductances vary, current pulses may face some alterations which endanger the proper function of sensorless algorithm. This means machine operation will be impaired or even may be unsustainable. In this paper, via Finite Element Analysis (FEA) machine characteristics is examined under EFs and it is evaluated how they affect SRMs' performance. Two modes for injecting high frequency pulses, namely negative slope of inductance and minimum inductance zone have been considered for current pulses. It is shown that although employed algorithm for pulse injection in minimum inductance is relatively more complicated but it is more fault tolerant than pulsing in negative slope. Using FEA and Matlab/Simulink models the main achievements of the paper are validated.","PeriodicalId":226320,"journal":{"name":"2014 5th Conference on Thermal Power Plants (CTPP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130960031","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}

引用次数: 1

Parallel operating of two energy storage battery systems using quasi Z-source inverter 准z源逆变器并联运行两个储能电池系统

2014 5th Conference on Thermal Power Plants (CTPP) Pub Date : 2014-06-10 DOI: 10.1109/CTPP.2014.7040713

J. Khajesalehi, M. Hamzeh, K. Sheshyekani, E. Afjei

{"title":"Parallel operating of two energy storage battery systems using quasi Z-source inverter","authors":"J. Khajesalehi, M. Hamzeh, K. Sheshyekani, E. Afjei","doi":"10.1109/CTPP.2014.7040713","DOIUrl":"https://doi.org/10.1109/CTPP.2014.7040713","url":null,"abstract":"In this paper, a power electronic interface (PEI) system is presented to parallel two energy storage battery units with difference current and voltage ratings. The PEI system is based on quasi Z-source inverter (qZSI) which is a single-stage ac/dc converter with two controllable DC ports. In non-controlled parallel operation of battery systems, the load current is shared between them according to their equivalent impedance; therefore, an effective controller is proposed to share load current between the battery systems according to their current ratings. The current sharing between battery systems is achieved by adjusting of the shoot-through duty cycle of inverter legs in a certain load demand. Moreover, the inverter modulation index is used for control of inverter current in a closed-loop configuration. In the grid-connected mode of operation that, each battery system current is independently regulated by adjustment of inverter modulation index and shoot-through duty cycle. The performance of the proposed control system in grid-connected and islanded modes is evaluated by time-domain simulation in MATLAB/Simulink environment.","PeriodicalId":226320,"journal":{"name":"2014 5th Conference on Thermal Power Plants (CTPP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114349642","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}

引用次数: 4

Parameter identification of proton exchange membrane fuel cell using a Hybrid Big Bang-Big Crunch optimization 基于大爆炸-大压缩混合优化的质子交换膜燃料电池参数辨识

2014 5th Conference on Thermal Power Plants (CTPP) Pub Date : 2014-06-10 DOI: 10.1109/CTPP.2014.7040612

M. Sedighizadeh, M. M. Mahmoodi, M. Soltanian

引用次数: 6

Recommendation of equipping steam unit of khoy combined cycle power plant with novel PID-PSS2B industrial stabilizer to decrease risk of sudden trips 建议在霍伊联合循环电厂蒸汽机组配置新型PID-PSS2B工业稳定剂，降低机组突然跳闸风险

2014 5th Conference on Thermal Power Plants (CTPP) Pub Date : 2014-06-10 DOI: 10.1109/CTPP.2014.7040700

J. Morsali, A. Parhizkar, H. Morsali, A. Zeinali

{"title":"Recommendation of equipping steam unit of khoy combined cycle power plant with novel PID-PSS2B industrial stabilizer to decrease risk of sudden trips","authors":"J. Morsali, A. Parhizkar, H. Morsali, A. Zeinali","doi":"10.1109/CTPP.2014.7040700","DOIUrl":"https://doi.org/10.1109/CTPP.2014.7040700","url":null,"abstract":"In order to acquire a more stable power unit, it is invaluable to find methods of enhancing plant stability. The position of Khoy combined cycle power plant (CCPP) is strategic from aspects of contribution in providing power for some important local and regional substations in proximity of Turkey. Current steam unit lacks any supplementary stabilizer and trips frequently following of various small and large perturbations. Hence, it seems to be essential to equip the unit with a good-structure industrial power system stabilizer (PSS) such as PSS2B to decrease risk of emergency outages. Nowadays in all over the world, new advanced industrial excitation control systems use IEEE Std. 421.5 to build practical stabilizer of PSS2B from the accelerating power signal to cover a wide range of oscillation frequencies. PSS2B module can be utilized as an add-on to retrofit excitation systems in refurbishment programs. The robust coordinated design of proportional-integral-derivative (PID) based PSS2B and PID-automatic voltage control (AVR) of the steam unit is formulated as a nonlinear optimization problem in which adjustable parameters are optimized simultaneously via an improved particle swarm optimization (IPSO) algorithm by minimizing integral of time multiplied squared error (ITSE) performance index. Siemens RG3 excitation system is modeled according to IEEE AC7B. To evaluate the robustness and effectiveness of recommended stabilizer, eigenvalue analysis and dynamic simulations are performed in MATLAB/SIMULINK for different operating conditions and disturbances. The results show that proposed stabilizer can provide outstanding enhancement in dynamic stability for steam unit to reduce its emergency outages.","PeriodicalId":226320,"journal":{"name":"2014 5th Conference on Thermal Power Plants (CTPP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131226212","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}

引用次数: 0

Interaction of combined cycle power plant (CCPP) and power system at two levels of performance optimization 联合循环电厂与电力系统在两个性能优化层次上的相互作用

2014 5th Conference on Thermal Power Plants (CTPP) Pub Date : 2014-06-10 DOI: 10.1109/CTPP.2014.7040605

H. Mokhtari, A. Sarajian

{"title":"Interaction of combined cycle power plant (CCPP) and power system at two levels of performance optimization","authors":"H. Mokhtari, A. Sarajian","doi":"10.1109/CTPP.2014.7040605","DOIUrl":"https://doi.org/10.1109/CTPP.2014.7040605","url":null,"abstract":"In this paper, considering two different scenarios, combined cycle power plant was optimized to reduce total system costs. In the first scenario, parameters of combined cycle power plant were optimized based on power system constraints. But, in the second scenario, they were optimized considering constraints of the power plant. Cost function of power plants includes consumable fuel price (natural gas), maintenance and repair cost and exergy destruction cost, which was fitted with a quadratic equation in this investigation. In both scenarios, combined cycle power plants were optimized by genetic algorithm based on two objective functions of total exergy efficiency of power plant and price function of generated power. The results obtained from these two scenarios showed that the second scenario introduced more optimized cost function than the first one. As a result, calculating cost function of power plant apart from the power system reduced costs of combined cycle power plant and total system and applying constraints of the power system to power plants discharged them from their optimized function and increased the costs.","PeriodicalId":226320,"journal":{"name":"2014 5th Conference on Thermal Power Plants (CTPP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133192491","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}

引用次数: 5