Application of Power Electronics Converters in Renewable Energy

Against the backdrop of global energy shortages and increasingly severe environmental pollution,renewable energy is gradually becoming a significant direction for future energy development.Power electronics converters,as the core technology for energy conversion and control,play a crucial role in enhancing the efficiency and stability of renewable energy systems.This paper explores the basic principles and functions of power electronics converters and their specific applications in photovoltaic power generation,wind power generation,and energy storage systems.Additionally,it analyzes the current innovations in high-efficiency energy conversion,multilevel conversion technology,and the application of new materials and devices.By studying these technologies,the aim is to promote the widespread application of power electronics converters in renewable energy systems and provide theoretical and technical support for achieving sustainable energy development.

New generation traction power supply system and its key technologies for electrified railways

Unlike the traditional traction power supply system which enables the electrified railway traction sub- station to be connected to power grid in a way of phase rotation, a new generation traction power supply system without phase splits is proposed in this paper. Three key techniques used in this system have been discussed. First, a combined co-phase traction power supply system is applied at traction substations for compensating negative sequence current and eliminating phase splits at exits of substations; design method and procedure for this system are presented. Second, a new bilateral traction power supply technology is proposed to eliminate the phase split at section post and reduce the influence of equalizing current on the power grid. Meanwhile, power factor should be adjusted to ensure a proper voltage level of the traction network. Third, a seg- mental power supply technology of traction network is used to divide the power supply arms into several segments, and the synchronous measurement and control technology is applied to diagnose faults and their locations quickly and accurately. Thus, the fault impact can be limited to a min- imum degree. In addition, the economy and reliability of the new generation traction power supply system are analyzed.

Life Cycle Assessment,Estimation and Comparison of Greenhouse Gas Mitigation Potential of New Energy Power Generation in China

From the perspective of life cycle assessment （LCA）, the development, construction, and operation of all kinds of new energy power generation technologies release greenhouse gas （GHG） emissions. This sparks concerns about the lowcarbon nature of the new energy power generation technologies. Based on national and international literature review, this paper estimates and compares the GHG emission factors of traditional thermal power generation and new energy power generation technologies in China with the LCA approach. The GHG mitigation potential of new energy power generation technologies as substitution for traditional thermal power generation in China was evaluated, according to the objectives of new energy power generation of the national development planning. The results show that the GHG emission factors of new energy power generation axe much lower than that of traditional thermal power generation even with LCA accounting, and the GHG mitigation potential of new energy substitution is huge.

Research on the Application of New Energy Photovoltaic Power Generation Technology

With the rapid development of technology and economy,the demand for energy in society is increasing.People are gradually realizing that fossil energy is limited,and the development of new energy may also face situations where it cannot meet social needs.The problem of resource shortage is gradually exposed to people.Therefore,the development of usable new energy has become an urgent problem for society to solve.At present,electricity is the most widely used energy source worldwide and photovoltaic power generation technology is gradually becoming well-known.As an emerging industry,the development of photovoltaic power generation still requires continuous promotion by national and social policies to be extended to various industries and ensure the stability of its energy supply.This article mainly outlines the principles,characteristics,and advantages of photovoltaic power generation,and briefly explains the current technology types and application aspects of photovoltaic power generation to contribute to its promotion and better serve all aspects of social life with new energy.

Steady-State Analysis of Grid-Connected New Energy Power Plants

In order to ease the fossil energy crunch,new energy sources need to be fully utilized.Clean energy sources such as wind,light,and nuclear energy are important tools to solve environmental and energy problems.However,in the process of researching new energy farms,there are some problems when they are integrated into the power system.In order to ensure the stability of new energy power plants,it is necessary to conduct an in-depth analysis of the grid connection technology of new energy farms.In the study,it is necessary to learn about the specific problems of the stability of the grid connection of new energy power plants,and to clarify the specific application of the grid connection technology of new energy power plants from the application principle and advantages of the grid connection technology of new energy power plants.Through simulation experiments,the positive effect of grid connection technology of new energy power plants in improving the stability of power systems was determined.

Research on New Compressed Air Energy Storage Technology

In recent years, wind power generation and photovoltaic power generation have been developing rapidly, and the installed capacity of the new resources generation has been keeping a fast growth every year. But with the incorporation into the grid, the new resources generation that has the properties such as randomness and volatility causes certain risks to the power grid, which results in the falling of the incorporation proportion instead of rising. This paper describes the current status and development problems of the new energy in China, and gives a brief introduction of characteristics of various energy storage technologies. This paper focuses on the analysis of the compressed air energy storage technology in recent years and new developments and the latest technology at home and abroad, additionally, the paper introduces a new concept of the compressed air energy storage system.

Research of Thermal Energy Storage Technology in the Solar Thermodynamic Power

Recently, although renewable energy has a great development, primary source is still thermal power generation, which uses fossil fuel as the energy source. Supply and demand of fossil fuel are essential for social and economy development. However, development pattern that excessively relies on the natural source is impossible to provide a sustainable development way for us. As a result, we should combine renewable energy with new energy technology as the aim of economy. It means that it is urgent to exploit new energy. Meanwhile, the ratio of energy waste cannot be ignored. How to decrease energy waste is also significant. Construction sector costs a lot of energy, which is mainly used for heating and refrigeration. In the new energy generation technology, thermal energy can be transformed to electricity with combination of BIPV and thermal energy storage technology. Photovoltaic generation has a great progress in the building construction. As a result, the thermal energy storage technology becomes the key link in the production chain. In this paper, feasibility of applying phase-change material (PCM) in the thermal energy storage will be analyzed. And analysis results are provided with a relative mathematical model.

Integrated Renewable Energy Solutions for Aquaculture Processing Enerfish

The European Union Framework Programme 71 Enerfish project aims to demonstrate a new poly-generation application with renewable energy sources for the fishery industry in Vietnam. The fish processing plant under consideration can be made by energy self-sufficient when all fish waste oil is processed into biodiesel and further converted to electricity and heat （for cooling） in a CHP （combined heat and power） unit. The purpose of the present paper is to discuss the profitability of such plants in southeast Asia. The economic model shows that electricity production is, due to the low electricity tariff, uneconomical （except during electricity blackout）, even if cogeneration heat can be utilized. This prompt a design of the plant whereby the necessary heat for the biodiesel process is taken from the waste heat produced by the compressors of a CO2 cooling system. According to the calculations and assumptions of the present study, the profitability of biodiesel production from fish cleaning wastes in Vietnam depends strongly on the market prices for fish waste and fish oil. Different business case scenarios are described.

新能源发电系统控制技术研究

随着经济社会发展,人们用电需求在不断增长,需要将有限的电能资源进行合理利用,找寻新的发电技术和途径,新能源电力技术及控制技术需要得到新的发展。在发电、输电、配电及用电环节中,电力机制发挥着极为重要的作用,能够组建起电能生产与消费的一体化环节。可以运用发电装置将自然界中的可再生能源转变成为电能,用户可以通过输电系统获得电能,给日常生活提供能量供应。传统发电方式难以大规模存储电能,需要控制电能输出方式。新能源发电与传统发电方式存在较大的差异性,新能源的发电输出功率是可控的。该文主要叙述新能源电力系统运行的基本特点,并说明电力系统的主要控制技术及控制策略,为后续新能源电力工程的顺利发展奠定强有力基础。

面向区块链技术应用的能源交易系统效果评价

随着我国能源体系的转型发展与新型电力系统的建设,以清洁能源为主的分布式能源成为重要供能方式。传统能源市场交易方式单一,大多采用集中化的运营管理方式,无法解决分散式能源系统的交易需求。区块链技术作为新兴技术手段,其去中心化、不可篡改等技术特点与分布式能源系统相契合,能够解决新型能源交易现存的一些问题。基于此,提出一种基于区块链技术的新型能源交易流程,给出智慧能源一体化、智慧能源托管、区域共享能源3种商业模式,并将能源交易服务业务划分为运维管理服务、系统改造服务以及市场交易服务,构建区块链能源交易系统效果评价指标体系。应用层次分析-模糊综合评价方法进行评价,通过算例仿真分析,证明基于区块链技术的能源交易系统效果评价指标体系的有效性。

新能源汽车动力电池产业发展特点与趋势分析

文章通过研究和分析我国新能源汽车动力电池产业的发展特点及其发展趋势,讨论了产业链协同发展、新型电池技术的发展和应用、电池回收利用技术和产业链不完善等问题。提出了新能源汽车动力电池产业未来的政府在制定政策上的建言和未来发展建议。

新能源汽车动力传动系统的设计研究

深入研究了新能源汽车动力传动系统的设计与优化,关注于混合动力的复杂性、电动驱动的高效性、多元化能源的融合以及协同控制策略等关键领域。通过引入先进的能源存储技术和智能化混合动力控制系统,旨在提高系统性能和能源利用效率。同时对多能源融合的协同性进行了深入研究,探索多种能源形式的有机整合,为汽车动力系统提供更灵活、可持续的能源供给。

电力电量平衡分析及其加速求解技术的发展、应用与展望

随着电力系统能源转型的加速推进,新能源渗透率显著提高,多区系统互联更加密切,多能源系统耦合程度不断增强,电力市场改革逐步深入,使得新型电力系统中电力电量平衡分析更加复杂。因此,总结归纳电力电量平衡分析技术的已有进展与典型应用,结合新型电力系统的主要特点对电力电量平衡分析技术进行展望,将有助于应对未来高维不确定性下的新型电力系统电力电量平衡问题。围绕电力电量平衡问题,首先介绍其常用的几种分析方法,在此基础上针对多时间尺度下电力电量平衡分析技术进行归纳,并总结相应的加速求解技术,然后对电力电量平衡典型应用场景进行综述,最后面向新型电力系统,对电力电量平衡分析的未来发展方向进行了展望。

基于数字孪生技术的新型电力系统数字化

随着“双碳”目标的提出,大规模的清洁能源、电力电子设备和新型负荷将接入电力系统,传统的电力系统管理控制模式难以应对双侧随机性、波动性增强等问题,电力系统的安全稳定运行迎来巨大挑战。数字孪生技术作为重要的数字化手段,成为电力系统转型升级新方法。针对新型电力系统内在机理发生的深刻复杂变化,综述了数字孪生的发展历程以及其在电力系统领域的研究现状,并从新型电力系统数字化需求、数字建模方法、数字化平台建设3个层面研究了电力系统数字化转型进程。最终,提出了以数字孪生技术为核心的新型电力系统建模方法和框架。

基于储能的非电气化铁路新型牵引供电系统架构及关键技术

为解决非电气化铁路采用110 kV/220 kV强网传统方案构建电气化铁路牵引供电系统难度大、成本高的问题,提出一种基于储能的以风、光等新能源为主体的新型牵引供电系统。分别从储能技术类别、工作原理、数学模型和典型应用等方面对新型牵引供电系统进行总结,阐明适配新型牵引供电系统的储能技术属性,阐述新型牵引供电系统内涵、特征和形态,并建立新型牵引供电系统的电气拓扑、测控平台、监控网络和管控逻辑架构;面向新型牵引供电系统源-荷随机强波动特征,从整体视角论述组分相互作用机理、系统稳定运行机制、能量流均衡机制和系统效能涌现机理,以及规划与优化配置、电能高效变换、能量自洽调度、效能评估和性能保持等关键技术。结果表明:建立基于储能的非电气化铁路新型牵引供电系统,可实现非电气化铁路的绿色低碳、弹性自洽、经济高效的电气化升级;为后续开展“理论研究-仿真验证-试验验证-评估优化”循环迭代的闭环研究提供参考借鉴。

新能源发电产业高质量发展的价格杠杆效应研究

中国新能源发电产业高质量发展,能够有力地带动能源生产侧清洁化,为部分地区电力供应不足提供新的解决方案。然而,新能源本身具有较强的波动性和间歇性,对保障供电充裕性和稳定性产生了较大影响,其与现有电力系统的匹配度还有待提升。应正视新能源发电产业高质量发展表现出来的问题和新能源发电给传统电力行业带来的挑战,积极发挥价格杠杆作用,促进新能源电力合理分布,储能技术推广,备用容量扩大,提升系统调峰功能,推动电网跨区传输,保障中国新能源发电产业可持续发展,为中国经济社会发展提供坚强保障。

轮毂电机技术在新能源汽车上的应用分析

近年来,随着新能源汽车技术的快速发展,传统的汽车驱动方式已经不能满足新能源汽车的发展需求。轮毂电机技术是一种新型驱动方式,可以为新能源汽车提供更多的动力。轮毂电机技术能够提高新能源汽车的行驶里程,对新能源汽车的发展具有重要意义。基于此,本文就轮毂电机技术的特点、目前存在的问题以及优化措施进行阐述和分析,希望对中国新能源汽车产业实现稳步发展有一定的促进意义。

新能源汽车技术研究与产业发展举措

新能源汽车是我国战略新兴产业,现有基础设施建设滞后、核心技术创新力不足、质量保障体系不全、产业推广受限等问题,需大力开展技术攻关、构建产业体系,提升配套设施。梳理了节能与新能源重点专项研究任务、关键技术、研究热点。简述研发体系建设、基础技术提升、核心技术攻关,动力电池提升及高效循环利用5个发展举措,并阐述了新能源汽车的发展方向与建设路径。

中国新能源汽车发展现状及对策建议

随着传统燃油汽车数量的增多,环境污染问题愈发严重。现阶段,发展新能源汽车产业成为各个国家的共识。文章首先介绍了新能源汽车的分类;其次列举了新能源汽车方面的国家政策,从新能源汽车销售量和上险量两个方面阐述了国内新能源汽车的产业发展现状;紧接着对新能源汽车发展过程中存在的问题进行分析,指出新能源汽车存在售价和使用成本高、续航里程不足、安全性不足、企业核心技术缺乏等问题;最后提出建议促进了新能源汽车产业的高质量高效率发展。

系统储能与可再生能源协同运行中的智能算法分析

阐述系统储能技术与可再生能源协同运行的特点,它在缓解可再生能源间歇性挑战中起着关键作用。探讨人工智能算法在新型电力系统中的应用,包括在储能技术、可再生能源协同运行中的应用。