Noise Control Solutions for Diesel Generator Sets

A persistent challenge for Oman's energy infrastructure was the deafening rumble of diesel generators. The Silent Generator Project addressed this challenge, developing advanced generators that deliver power quietly and efficiently. Diesel generators have historically been notorious for being noisy and vibrational, making them unsuitable for sensitive environments. To dramatically reduce noise levels, the project utilized innovative materials and design modifications to ensure reliable and quiet electricity for various applications. In all directions, the project advanced the knowledge of noise reduction through rigorous testing and meticulous integration of insulators and mufflers. As a result, quieter, more sustainable energy production is on the way, marking a major advance in silent generator technology. Furthermore, the Silent Generator Project lays the foundation for more efficient and environmentally friendly diesel generator technologies in the future. As a result of this research, a new standard for quieter, greener energy generation is established, demonstrating the critical role noise reduction plays in energy generation. Additionally, this work also suggests future diesel generator technologies that are more efficient and environmentally friendly. As a result of this research, a new standard for quieter, greener energy generation is set, demonstrating the critical role noise reduction plays in energy generation.

Eco-Friendly Selection of Diesel Generator Based on Genset-Synchro Technology for Off-Grid Remote Area Application in the North of Quebec

For most of their energy requirements, greater part of remote communities and small islands around the world rely on imported fossil fuels. The economical cost of energy is therefore very high not only due to inherent cost of fuel, but also due to transportation and due to maintenance costs. One solution for saving fuel in a diesel generator is to allow the engine to operate directly in relation to the request for electrical load at variable speeds. Genset-Synchro Technology has developed an innovative variable speed?generator technology (patent pending) that allows applications where power demand varies widely to benefit from the new technology that maintains constant voltage and frequency while adjusting the generator stator speed to power demand. This paper will present an innovative approach for optimizing the energy production based from the fact that the structure that contains the stator windings of the generator is mounted on roller bearings, which allows its free rotation around the axis of the rotor, consequently stopping the stator structure from being static and aims to minimize the unit cost of electricity. Case study on application in remote area in the north of Quebec is described. A saving of 7%?-?9% on fuel consumption and greenhouse gas (GHG) under low winter ambient temperatures has been registered.

Inverter-Based Diesel Generator Emulator for the Study of Frequency Variations in a Laboratory-Scale Autonomous Power System

This paper presents the modeling, simulation and practical implementation of an inverter-based diesel generator emulator. The main purpose of this emulator is for the study of frequency variations in diesel-based autonomous power systems in a laboratory environment where the operation of a real diesel generator is not possible. The emulator basically consists in a voltage source inverter with a second order output filter which voltage references are given by the model of the diesel generator. The control of the emulator is based on the digital signal processor TMS320F2812, where the mathematical models of the diesel generator and the control of the inverter are computed in real-time. Parameters for the model were obtained from commercially available components. Experimental results for different values of speed droop showed that the emulator achieves a satisfactory performance in the transient and stationary response. For the stationary response, the measured frequency deviates from theoretical values with a mean absolute error of: 0.06 Hz for 0% droop, 0.037 Hz for 3% droop, and 0.087 Hz for 5% droop. For the transient response, the measured frequency nadir deviates from simulations in: 0.05 Hz for 0% droop, 0.02 Hz for 3% droop, and 0.1 Hz for 5% droop.

Performance Optimization of Diesel Generators Using Permanent Magnet Synchronous Generator with Rotating Stator

One of the solutions to reduce fuel consumption of diesel generators (DG) is to adapt the rotational speed to mechanical torque of the crankshaft. When load power decreases, a reduction in both mechanical torque and rotational speed of the diesel engine will maintain the combustion efficiency near the levels of the nominal regime. Accordingly, the generator itself should operate at a variable speed which normally requires power electronics converters. In this paper, we are exploring a new generator concept that uses a stator rotating in opposite direction to the rotor such as the relative velocity between the two components remains constant when diesel engine slows down. The stator itself is driven by a compensator synchronous motor (CM) such as the relative velocity of the rotor is constant, eliminating as such sophisticated power electronics. The model developed for the synchronous machine with a rotating stator is based on Park’s transformation. This new concept was modelled using MATLAB software. Experimental analysis has been conducted using a 500-kW diesel GENSET equipped with a permanent magnet synchronous generator (PMSG). The numerical and experimental results are in good agreement and demonstrate that fuel consumption is reduced with a rotating-mode stator for PMSG during low electrical loads.

Economic Assessment of Standby Diesel Generator for Peak Reduction in Commercial and Industrial Buildings:A Case Study in Malaysia

This paper outlines the barriers and potential benefits of using standby diesel generators in mitigating the peak demands for commercial and industrial customers. The feasibility of utilizing the standby diesel generators to reduce the electricity bills for customers is carried out by using the hybrid optimization model for electric renewable(HOMER)software. The size of the standby diesel generator and its operational duration are determined based on the lowest cost of electricity obtained from the evaluations. The economic assessments demonstrate that there is potential to reduce the electricity bills for commercial and industrial customers under the existing fuel price and tariffs. The commercial customers under the tariff C2 have the highest potential to save their electricity bills with the use of standby diesel generators for peak reduction. This study demonstrates the potential of the standby diesel generators in peak reduction.

A Review and Comparison on Recent Optimization Methodologies for Diesel Engines and Diesel Power Generators

The electrical instability that frequently distinguishes the isolated networks and depends on diesel generators to supply their energy requirements leads to an operation of the diesel generator in a transient dynamic condition and/or at low loads. In addition, extended operation of the diesel generator at partial load develops the condensation of combustion residues on the engine cylinder walls, which, after a certain time, increases friction, reduces the efficiency of the equipment and increases its fuel consumption. On the other hand, recent regulatory changes have led to ever more stringent and evolving emission standards. Among these, the International Maritime Organization (IMO) and the Environmental Protection Agency (EPA) have implemented emission standards in order to reduce exhaust gas emitted by marine diesel engines. To phase lower emission engines as soon as possible, a Tier system was adopted. This paper presents a literature review of existing technologies available to optimize the energy performance of diesel engines and diesel generators in order to reduce the cost of electricity, to increase the diesel engine efficiency and to decrease their fuel consumption and greenhouse gases (GHG) emissions. The proposed optimization methodologies are based on the application of Pre-treatment, Internal treatment and Post-treatment technologies for diesel engines and on the application of mechanical and electrical technologies for diesel power generators (DPGs). The list of references given at the end of the paper should offer aids for students and researchers working in this field.

Modelling and Implementation of Multi-source Isolated Microgrid Using Virtual Synchronous Generator Technology

To improve the living standards,economical efficiency and environmental protection of isolated islands,remote areas and other areas with weak electric power facilities construction,a multi-source independent microgrid system is studied,including diesel generators,photovoltaic power generation system,wind power generation system and energy storage unit.Meanwhile,in order to realize the voltage and frequency stability control of AC bus of multisource microgrid,the virtual synchronous generator technology is introduced into the energy storage unit,and the charge and discharge control of the energy storage battery are simulated as the control behavior characteristics of synchronous motors,so as to provide damping and inertia support for the microgrid.The operation mode and control principle of each energy subsystem are expounded and analyzed.The algorithm principle of virtual synchronous generator and the control method of energy storage unit are given.Then,the working modes of the microgrid system under different environmental conditions are analyzed,and the multi-source microgrid system simulation model is built based on MATLAB/Simulink.The simulation results show that the microgrid system can run stably under different working modes and the energy storage unit using the virtual synchronous generator technology can provide good voltage and frequency support for the microgrid system.Finally,experiments verify the supporting function of energy storage unit on the voltage and frequency of the microgrid system.

A method of parsing based on improving the electricity behavior and regulating excitation system of the diesel generating set in the nuclear power plant

This paper introduces an applicable test plan for emergency diesel generator in nuclear power plant. It advances improvement approaches with problems found during field commissioning test and its trouble-shooting processes. The method is based on the integration of complementary through, the extension theory of matter-element model and neural network theory combine to overcome a neural network to learn shelters, and other defects. The purpose of this paper is to provide the better running and commissioning experience for the similar emergency generator unit.

Hybrid PV/Wind/Diesel Based Distributed Generation for an Off-Grid Rural Village in Afghanistan

Afghanistan has a tremendous resource potential of renewable energy especially solar and the wind. Therefore, utilization of these resources has a special rule for the remote areas where access to the electrical grid or secure power supply is a dream for most of the people. This paper presents a feasibility and usefulness of hybrid power generation based on PV/wind/diesel generator for an off-grid rural village that feeds the load at a rate of average 7.9 kWh/day with 1.32 kW peak load. GsT （geospatial toolkit） is used to obtain the solar and wind data of the site. Windographer software is used to analyze the wind resource data of the site. HOMER Pro software package is used to select the suitable and reliable hybrid generation system and calculate the optimal capacities and costs of the components. Through the study, it is found that this state of the art adaptation could provide vast opportunities for off-grid rural communities such as in Afghanistan where enough high penetration of renewable energy is available.

小功率柴油发电机谐波励磁自动控制方法仿真

为了降低发电机谐波含有率,提出一种小功率柴油发电机谐波励磁自动控制方法。通过多元经验模态分解(MEMD)预处理三相电流,对预处理的小功率柴油发电机电流信号展开多变量多尺度模糊熵(MMFE)变换处理,得到MEMD-MMFE熵值面积。根据熵值面积辨识谐波励磁涌流,获取异常和正常状态下的电流变化情况。分析谐波励磁原理对定子电流的特殊要求,在矢量六边形SVPWM调制的基础上研究三次谐波注入的调制策略,同时引入比例谐振控制完成小功率柴油发电机谐波励磁自动控制。仿真结果表明,所提方法具有良好的自动控制性能,上述方法控制下小功率柴油发电机中的谐波含有率得到明显改善。

超高层建筑综合体消防负荷供配电系统设计

结合现行国家、行业及地方规范、标准,对超高层建筑综合体的消防负荷供配电系统、柴油发电机选择等设计方法及设计要点进行详细探讨。

基于模型预测控制的双机组混合动力船舶能量管理研究

[目的]船舶柴电混合动力系统合理分配柴油机和电机输出功率,可大幅降低油耗和排放。针对传统混合动力能量管理策略的性能最优与运算实时的矛盾,提出采用模型预测控制(MPC)进行能量管理瞬时优化。[方法]首先,利用反向建模法搭建由双柴油发电机组、储能系统、岸电组成的客渡船混合动力系统能量流模型;然后,提出以油耗和电能消耗的总温室气体(GHG)排放为目标函数,在系统约束条件下可在线滚动优化求解的MPC能量管理算法,最终进一步进行了不同预测时域长度的灵敏度分析。[结果]仿真结果表明,MPC较传统规则控制方法可分别降低4.85%的燃油消耗量和3.54%的温室气体总排放。[结论]相比于传统的规则控制策略,MPC油耗低,温室气体排放少,且计算负荷较小,具有良好的实船应用潜力。

基于同步提取增强广义S变换的柴油机气门性能退化状态评估

柴油机在运行过程中气门间隙逐渐增大,其状态会随气门性能退化而发生改变。针对传统状态评估方法难以对其气门性能退化状态进行准确评估的问题,提出基于同步提取增强广义S变换(Synchro Extracting Enhanced Generalized S-Transform,SEEGST)的柴油机气门性能退化状态评估方法。通过传感器采集反映柴油机状态的振动信号;为解决传统信号时频分析方法存在时频分辨率低、能量聚集性弱等问题,基于同步提取算法与广义S变换提出SEEGST时频分析方法,将振动信号转换为二维时频图;利用MLP-Mixer模型提取时频图像特征进行训练,实现柴油机状态评估。通过柴油机状态监测实验台开展气门性能退化实验,将所提方法与SSGST-MLPMixer、GST-MLPMixer、SEEGST-ViT、SEEGST-2DCNN、FFT spectrum-1DCNN 5种传统方法对比。实验结果表明:所提方法的整体评估准确率达到98.96%,可有效应用于柴油机气门性能退化状态评估领域,为开展柴油机气门性能退化状态评估提供一种新的思路。

某市域铁路三中心不间断电源部署设计

某市域铁路调度运营培训中心工程作为行业的标杆,集调度、运营、培训等功能于一身,其弱电信息机房对网络汇聚具有关键作用。为确保供电稳定可靠,该工程特别采用了双重电源供电,并配备了不间断电源系统和柴油发电机组。然而,市域铁路领域在此方面的设计标准尚不完善。因此,文章依据数据中心、铁路、轨道交通等领域的设计规范与标准,进行了深入研究。从供电需求分析出发,明确了不间断电源系统选型的重要性,并探讨了电源架构的选择。同时,通过对容量的精确统计,确保了不间断电源系统的合理规模,阐述了不间断电源系统在市域铁路领域不间断电源设计的技术要点与注意事项,旨在为相关工程的设计与实施提供有力支持。

给水厂设计中台风暴雨防范技术的应用研究

X水厂近期设计规模25万m^(3)/d,工艺流程采用预臭氧-网格絮凝-平流沉淀-V型滤池-次氯酸钠消毒。水厂所在地台风暴雨频发,严重影响供水安全。为保证供水,外电采用一级负荷并设置柴油发电机,提高供电保证率;增加混凝剂存储时间至45d以保障台风暴雨期间药剂供应,采用固体药剂减小占地;采用现场制备次氯酸钠替代外购成品消毒剂,避免台风暴雨对消毒剂运输产生影响。为适应高温、高湿的气候特点,优化次氯酸钠储池设计,采用真空吊水启泵,减小泵房埋深。厂区竖向阶梯设计,节省土方;构筑物采用叠合工艺,节省工程用地。

核电厂应急柴油发电机状态监测和故障诊断系统研究

核电厂应急柴油发电机状态监测和故障诊断系统作为核电厂应急柴油发电机可靠性提升的最优方案,得到了核电行业专家高度认可,但因其系统复杂性,目前没有一款成熟产品面世。本文针对核电应急柴油发电机特殊环境和功能要求,以解决柴油发电机启动成功率要求高和有效避免重大设备灾难性损坏问题为目标,从状态监测、故障诊断、健康评估三个方面阐述了核电站应急柴油发电机状态监测和故障诊断系统的开发需求,并以柴油发电机仿真模型建立和验证为基础,分析了状态监测系统研发中定期试验、启停模块、带卸载模块,以及故障诊断中热力参数模块、往复运动模块、振动模块的关键点。希望本文能够为核电厂应急柴油发电机状态监测和故障诊断系统开发提供借鉴参考。

PLC辅助下船舶柴油发电机转速控制研究

柴油发电机在运行过程中受到外部扰动时转速的波动幅度增大,影响发电机的输出稳定性和效率,因此,本文提出一种PLC(可编程逻辑控制器)辅助下船舶柴油发电机转速控制方法。根据柴油发电机的基本工作结构,对其各个部件的模型进行构建与分析。通过分析各部件模型得出的参数和特性,从静态与动态2个角度出发,选取船舶柴油发电机转速控制指标,包括静差率、超调量和动态降落。将上述指标与PLC程序逻辑结合,通过监测实时数据来判断当前状态,然后根据反馈信息调节控制参数,有效地控制柴油发电机的转速。实验结果表明,本文方法能够更加快速地调整柴油发电机的转速,并且受到外力扰动时能够迅速调整回归平稳运行状态,保证柴油发电机的长期平稳运转。

矿区火电厂后备柴油发电机监控系统的设计与优化

矿区火电厂的生产环境复杂,一旦主电源出现故障,可能导致生产停滞、设备损坏甚至安全事故。因此,为保证稳定的电力供应,保护矿区生产和人员安全,有必要优化设计应用后备柴油发电机监控系统,在紧急情况下迅速启动,为关键设备提供电力,确保生产的连续性和安全性。鉴于此,本文分析了矿区柴油发电机的监控系统应用现状,明确柴油发电机组系统组成,而后就监控系统设计基本要求,以及监控系统设计结构及控制方法展开探讨,对该系统监控功能的具体实现进行分析,以期为更多矿区火电厂正常运行提供安全保障和支持。

考虑噪声影响的柴油发电机组并联运行自动化监控系统

设计考虑噪声影响的柴油发电机组并联运行自动化监控系统,实时监控柴油发电机组并联运行状态,确保其安全稳定运行。采集柴油发电机组并联运行状态数据,广义S变换的时频滤波算法合理去除所采状态数据噪声后,改进随机森林算法的故障感知与预测方法监测柴油发电机组并联运行状态,并将监测结果以及监控画面合理呈现于远程监控终端,供用户查看。实验结果表明,该系统可有效监控柴油发电机组并联运行状态,数据去噪效果较好,将其应用于实际工作,可获得较为理想的柴油发电机组并联运行自动化监控效果。

某核电工程SBO柴油发电机组设备鉴定方案研究

全厂断电(Station Block Out,SBO)柴油发电机组在全厂断电事故工况下,除作为水压试验泵的电源外,还为主控室和重要机柜间通风系统、安全壳环形空间通风系统、主泵相关电动阀门及非能动专用电源系统供电,保证控制室某些指示仪正常工作,并使单元机组运行必需的控制器可用,是核电厂的最后一道安全电源防线,其重要性不言而喻。为了确保设备的可靠性,某核电工程SBO柴油发电机组的安全分级为F-SC3(安全重要的非安全设备),且电气设备需要满足K3类鉴定要求。基于此,对某核电工程SBO柴油发电机组的鉴定要求和项目实施方案进行研究。