精机热加工厂电能质量分析与治理方案研究
发布时间：2019-06-20 03:48
【摘要】：电能质量关系到整个电电力系统安全、稳定、经济、可靠运行。随着国民经济的高速发展,大量电力电子设备和非线性负荷在电力系统中的应用,注入电网中的谐波越来越来,对电网及用电设备造成了很大的危害,致使电能质量不断恶化,甚至恶化电网的运行状况。随着电力部门及电力用户对电能质量的要求越来越高,因此有效的治理电网中的谐波,提高电能质量变得尤为重要。论文首先阐述了电能质量的基本内容,谐波的基本概念以及国内外对谐波的研究现状；然后对谐波的来源、主要危害、评判标准进行了详细的阐述,概述了治理谐波的相关方法；针对某热加工厂现状,建立系统仿真模型,分析了系统两段母线分列和并列运行时的电能质量相关指标,其中的谐波电流、谐波电压和功率因数存在不合格问题；在此基础上,设计了治理方案,采用静止无功发生器(SVG)和固定电容器(Fixed Capacitor,简称FC)在母线侧进行补偿,计算了相应的补偿容量和相应的装置的配置参数；通过CYME PSAF仿真软件对系统模型进行了仿真,结果表明补偿后的系统母线侧的谐波电流、谐波电压和功率因数均满足要求。因而该方法对消除谐波,改善电能质量有实际意义。
[Abstract]:Power quality is related to the safety, stability, economy and reliable operation of the whole electric power system. With the rapid development of the national economy, a large number of power electronic equipment and nonlinear loads are applied in the power system. The harmonics injected into the power grid have caused great harm to the power grid and electrical equipment, resulting in the continuous deterioration of power quality and even the deterioration of the operation of the power grid. With the increasing requirements of power departments and power users for power quality, it is particularly important to effectively control harmonics in power grid and improve power quality. In this paper, the basic content of power quality, the basic concept of harmonics and the research status of harmonics at home and abroad are described in detail, and then the sources, main hazards and evaluation standards of harmonics are described in detail, and the related methods of harmonic control are summarized. According to the present situation of a heat processing plant, the system simulation model is established, and the related indexes of power quality when the two-stage bus is separated and run side by side are analyzed, in which the harmonic current, harmonic voltage and power factor are not up to standard. On this basis, the control scheme is designed, and the static reactive power generator (SVG) and fixed capacitor (Fixed Capacitor, are used to compensate on the bus side, and the corresponding compensation capacity and the configuration parameters of the corresponding device are calculated. The system model is simulated by CYME PSAF simulation software, and the results show that the harmonic current, harmonic voltage and power factor on the bus side of the compensated system meet the requirements. Therefore, this method is of practical significance to eliminate harmonics and improve power quality.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM711
[Abstract]:Power quality is related to the safety, stability, economy and reliable operation of the whole electric power system. With the rapid development of the national economy, a large number of power electronic equipment and nonlinear loads are applied in the power system. The harmonics injected into the power grid have caused great harm to the power grid and electrical equipment, resulting in the continuous deterioration of power quality and even the deterioration of the operation of the power grid. With the increasing requirements of power departments and power users for power quality, it is particularly important to effectively control harmonics in power grid and improve power quality. In this paper, the basic content of power quality, the basic concept of harmonics and the research status of harmonics at home and abroad are described in detail, and then the sources, main hazards and evaluation standards of harmonics are described in detail, and the related methods of harmonic control are summarized. According to the present situation of a heat processing plant, the system simulation model is established, and the related indexes of power quality when the two-stage bus is separated and run side by side are analyzed, in which the harmonic current, harmonic voltage and power factor are not up to standard. On this basis, the control scheme is designed, and the static reactive power generator (SVG) and fixed capacitor (Fixed Capacitor, are used to compensate on the bus side, and the corresponding compensation capacity and the configuration parameters of the corresponding device are calculated. The system model is simulated by CYME PSAF simulation software, and the results show that the harmonic current, harmonic voltage and power factor on the bus side of the compensated system meet the requirements. Therefore, this method is of practical significance to eliminate harmonics and improve power quality.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM711
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1 陈警众;电能质量讲座 第四讲 电能质量改善措施的实际应用[J];供用电;2001年01期
2 ;教育部电能质量工程研究中心[J];安徽科技;2002年03期
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