2021 31st Australasian Universities Power Engineering Conference (AUPEC)最新文献_第2页

A Medium Voltage CHB Inverter with a Modified THPWM for Step-Up-Transformer-Less and Line-Filter-Less Grid Integration 一种改进THPWM的中压CHB逆变器，用于无步进-无变压器和无线滤波电网集成

2021 31st Australasian Universities Power Engineering Conference (AUPEC) Pub Date : 2021-09-26 DOI: 10.1109/AUPEC52110.2021.9597720

S. P. Biswas, Md. Rabiul Islam, M. Anower, M. Rahman, A. Arefi

{"title":"A Medium Voltage CHB Inverter with a Modified THPWM for Step-Up-Transformer-Less and Line-Filter-Less Grid Integration","authors":"S. P. Biswas, Md. Rabiul Islam, M. Anower, M. Rahman, A. Arefi","doi":"10.1109/AUPEC52110.2021.9597720","DOIUrl":"https://doi.org/10.1109/AUPEC52110.2021.9597720","url":null,"abstract":"A simple traditional inverter which generates a square wave is not satisfactory for grid integration. A pure sinusoidal wave is highly desired for grid tied inverter. Multilevel inverter (MLI) has emerged a key technological development in the field of energy control for high-power medium-voltage (6–36 kV) by generating sinusoidal output waveform without using large and bulky line filter. The cascaded H-bridge (CHB) inverters produce more output voltage levels (e.g., more sinusoidal) in the medium-voltage range, hence minimize the harmonic components. In this paper, a fifty-five level (55L) CHB converter is designed, simulated, and analyzed for 11kV system using a new modified third harmonic injected pulse width modulation-based (MTHPWM) switching technique. Performance of existing switching techniques and proposed switching technique with a 55L, 3-$phi$, 11kV CHB inverter is evaluated in terms of total harmonic distortion (THD) and inverter loss. The proposed modulation scheme results very promising THD profile (3.41%) and reduces switching losses over other conventional modulation techniques. All the simulated results are carried out in the MATLAB/Simulink environment.","PeriodicalId":246799,"journal":{"name":"2021 31st Australasian Universities Power Engineering Conference (AUPEC)","volume":"225 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115739630","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

Neural State Feedback Control of Reserve Energy Utilisation for Coal-Fired Power Plants to Enhance Frequency Performance 提高燃煤电厂频率性能的备用能量利用神经状态反馈控制

2021 31st Australasian Universities Power Engineering Conference (AUPEC) Pub Date : 2021-09-26 DOI: 10.1109/AUPEC52110.2021.9597797

Xiaoming Li, Xinghuo Yu

{"title":"Neural State Feedback Control of Reserve Energy Utilisation for Coal-Fired Power Plants to Enhance Frequency Performance","authors":"Xiaoming Li, Xinghuo Yu","doi":"10.1109/AUPEC52110.2021.9597797","DOIUrl":"https://doi.org/10.1109/AUPEC52110.2021.9597797","url":null,"abstract":"Coal-dominated energy markets with high renewable show frequency control degradation which is an obstacle of renewable power integration. A neural state-feedback (NSF) control strategy assisting an unit coordinate control (UCC) is proposed to improve the automatic generation control (AGC) and frequency control ancillary services (FCAS) for coal-fired power plants via utilising the reserve energy released from condensate stoppage (CS). The strategy consists of two loops - the neural state feedback inner loop and the traditional proportion-integration-differentiation (PID) control outer loop. First, ELMAN neural networks (NNs) are employed to approximate the local condensate plant models at chosen operating conditions and based on which, a neural state observer bank is built. Second, based on state observer bank, local NSF controllers are designed via training newly introduced NNs and Bayes weighting is employed to synthesise the overall control output. Third, a traditional PID controller is installed at the outer loop to track the delta load demand for the condensate plant to improve AGC and FCAS responses. The proposed design provides a purely data-driven control without depending on experts' experience which is suitable for complex industrial process controls. Simulations on a coal-fired power plant show the effectiveness.","PeriodicalId":246799,"journal":{"name":"2021 31st Australasian Universities Power Engineering Conference (AUPEC)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114724591","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

Battery Lifetime Modelling in Planning Studies of Microgrids: A Review 微电网规划研究中的电池寿命建模:综述

2021 31st Australasian Universities Power Engineering Conference (AUPEC) Pub Date : 2021-09-26 DOI: 10.1109/AUPEC52110.2021.9597840

Rahmat Khezri, A. Mahmoudi, N. Ertugrul, M. Shaaban, A. Bidram

引用次数: 2

Conference Program and Technical Sessions 会议计划和技术会议

2021 31st Australasian Universities Power Engineering Conference (AUPEC) Pub Date : 2021-09-26 DOI: 10.1109/aupec52110.2021.9597795

引用次数: 0

Short circuit performance of transformers in solar PV systems 太阳能光伏系统中变压器的短路性能

2021 31st Australasian Universities Power Engineering Conference (AUPEC) Pub Date : 2021-09-26 DOI: 10.1109/AUPEC52110.2021.9597798

V. Sreeram, M. Rajkumar, S. S. Reddy, T. Gurudev, Maroti

引用次数: 1

Power Quality Issue and Mitigation Technique at High PV Penetration in Electricity Grid 光伏高渗透下电网电能质量问题及缓解技术

2021 31st Australasian Universities Power Engineering Conference (AUPEC) Pub Date : 2021-09-26 DOI: 10.1109/AUPEC52110.2021.9597821

Dronika Sirigiri, N. Das, R. Bansal

{"title":"Power Quality Issue and Mitigation Technique at High PV Penetration in Electricity Grid","authors":"Dronika Sirigiri, N. Das, R. Bansal","doi":"10.1109/AUPEC52110.2021.9597821","DOIUrl":"https://doi.org/10.1109/AUPEC52110.2021.9597821","url":null,"abstract":"Nowadays, Distributed Generation (DG) is the most effective technique for the generation of onsite power through renewable energy sources. The energy coming from renewable sources is connected to the common point of the distribution system by using power-conditioning systems to increase reliability and cost minimization. The successful integration of distribution generation in the distribution system relies on quality power. The power quality of the distribution system is proliferated due to the existence of non-linear power-electronic devices and the sudden switching of loads. Over the classical compensation techniques, the custom-power devices play a key role in the distribution system for compensation of power-quality issues. Among various custom-power devices, the unified-power quality compensator fulfils the high capability for mitigation of all voltage and current issues by using superior control schemes. A multifunctional-UPQC has been proposed for distribution generation and power-quality enhancement in a distribution system in this work. It reduces the usage of additional power-conditioning devices and control schemes. The performance of the proposed MF-UPQC is investigated in both DG interface and PQ enhancement using MATLAB/Simulink software. The simulation results are also presented in detail.","PeriodicalId":246799,"journal":{"name":"2021 31st Australasian Universities Power Engineering Conference (AUPEC)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123166623","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

Mathematical Analysis on Harmonics Mitigation Using a Phase-Shifted Transformer based Twelve-Pulse Variable Frequency Drive 基于移相变压器的十二脉冲变频驱动谐波抑制的数学分析

2021 31st Australasian Universities Power Engineering Conference (AUPEC) Pub Date : 2021-09-26 DOI: 10.1109/AUPEC52110.2021.9597716

A. Mujahid, Akhtar Kalam, S. Alizadeh, Yuanyuan Fan

{"title":"Mathematical Analysis on Harmonics Mitigation Using a Phase-Shifted Transformer based Twelve-Pulse Variable Frequency Drive","authors":"A. Mujahid, Akhtar Kalam, S. Alizadeh, Yuanyuan Fan","doi":"10.1109/AUPEC52110.2021.9597716","DOIUrl":"https://doi.org/10.1109/AUPEC52110.2021.9597716","url":null,"abstract":"Harmonics are among the serious problems that affect the power quality of an electrical system. However, harmonics nowadays are inevitable due to the ever-increasing number of Variable Frequency Drives (VFDs), Uninterruptible Power Supply (UPS) and other non-linear loads. In this regard, IEEE519 Standard specifies the allowable Total Harmonic Distortion (THD) and Total Demand Distortion (TDD) at a given point of common coupling (PCC). In this practical research, we have performed an extensive mathematical analysis to investigate the efficiency of a harmonic filter based on two transformers with 30 electrical degrees phase difference in reducing THD and TDD and maintain these parameters within the acceptable range defined by the standard. Analysis was carried out using actual data collected from the King Fahad Medical City Faculty of Medicine (KFMCFOM) Building Riyadh, Saudi Arabia. The results demonstrated that the phase-shifted transformer-based method removes some of the harmonic components caused by six-pulse VFDs and acts as a twelve-pulse VFD when connected with phase-shifted transformers in parallel. Accordingly, implementing the proposed method resulted in an over 50% reduction of THD and TDD values of the test system.","PeriodicalId":246799,"journal":{"name":"2021 31st Australasian Universities Power Engineering Conference (AUPEC)","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123368989","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

Comparative Study on Induction Machines: Three-Phase vs. Five-Phase Winding Configurations 感应电机的比较研究:三相与五相绕组配置

2021 31st Australasian Universities Power Engineering Conference (AUPEC) Pub Date : 2021-09-26 DOI: 10.1109/AUPEC52110.2021.9597743

Z. Cao, Gabriel Andres Rojas Cardenas, E. Roshandel, A. Mahmoudi, S. Kahourzade, W. Soong

引用次数: 0

A Stability Assessment and Estimation of Equivalent Damping Gain for SSR Stability by Nyquist stability criterion in DFIG-based windfarms 基于Nyquist稳定准则的dfg风电场SSR稳定性评估及等效阻尼增益估计

2021 31st Australasian Universities Power Engineering Conference (AUPEC) Pub Date : 2021-09-26 DOI: 10.1109/AUPEC52110.2021.9597793

Chirag Rohit, P. Darji, H. Jariwala

{"title":"A Stability Assessment and Estimation of Equivalent Damping Gain for SSR Stability by Nyquist stability criterion in DFIG-based windfarms","authors":"Chirag Rohit, P. Darji, H. Jariwala","doi":"10.1109/AUPEC52110.2021.9597793","DOIUrl":"https://doi.org/10.1109/AUPEC52110.2021.9597793","url":null,"abstract":"Sub-synchronous resonances (SSR) arise in a doubly fed induction generator (DFIG) based wind farm due to the rotor circuit's negative resistance characteristic at low wind speeds and a high compensation level in a transmission line. This paper presents the Nyquist criterion-based stability assessment approach to investigate SSR in the induction generator-based series compensated network and estimate for damping gain for the open-loop transfer function of the study system. The frequency-domain-based impedance model of the induction generator and transmission line impedance model is used to develop the study system's overall open-loop transfer function. The stability analysis shows that low wind speed and high compensation levels induce the SSR phenomenon in DFIG based wind farms. The relative stability shown by phase margin and gain margin is used to calculate the approximate damping gain for the open-loop transfer function of the study system. Using the proposed approach, the results show that the estimation for the damping gain makes the phase margin and gain margin of the study system positive at low wind speed and high compensation level, reducing the risk of SSR.","PeriodicalId":246799,"journal":{"name":"2021 31st Australasian Universities Power Engineering Conference (AUPEC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121839755","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: 2

Review of Battery Balancing Techniques based on Structure and Control Strategy 基于结构与控制策略的蓄电池平衡技术综述

2021 31st Australasian Universities Power Engineering Conference (AUPEC) Pub Date : 2021-09-26 DOI: 10.1109/AUPEC52110.2021.9597839

Md Morshed Alam, D. Lu, R. Aguilera

引用次数: 1