高密度供电区域典型负荷电能质量监测分析

发布时间：2018-11-13 08:41

【摘要】：随着经济的发展和配电负荷的持续增加,区域性高密度供电负荷群逐渐形成。用户中大量非线性负荷运行时会向电网注入大量谐波,使系统电压、电流波形畸变,引起三相不平衡及电压波动和闪变问题,严重的可能导致系统发生频率波动,对电力系统的电能质量造成污染。与此同时,众多复杂的、高精密、对供电质量敏感用电设备的普及,使人们对电能质量的要求越来越高。因此,有必要深入了解并掌握高密度供电区域典型负荷的电能质量状况,以改善供电质量、提高电网安全可靠性。本文将高密度供电区域中的常见负荷分类,分析了典型负荷的功率特性、冲击特性和谐波特性,针对负荷的每种特性研究了相应的建模方法；在此基础上,结合萧山电网高密度供电区域实际情况,选择确定典型负荷电能质量监测点,利用电能质量分析仪采集各测点的实际运行电气量,分析高密度供电的城市智能配电网电能质量、电气运行特性；最后,综合评估了萧山电网高密度供电区域典型负荷测点的电能质量状况,基于柔性配电设备补偿特性,针对典型负荷测点的电能质量问题提出相应的柔性治理措施,为萧山高密度供电区域典型负荷电能质量问题的解决提供了决策依据,有利于供电部门了解整个电网的情况、制定更好地运行计划。
[Abstract]:With the development of economy and the continuous increase of distribution load, regional high density power supply load group is gradually formed. A large number of nonlinear loads among users will inject a large number of harmonics into the power network, thus distorting the voltage and current waveforms of the system, causing three-phase unbalance and voltage fluctuation and flicker problems, which may seriously lead to the frequency fluctuation of the system. Pollute the power quality of power system. At the same time, with the popularization of many complex, high precision and sensitive power supply equipments, the demand for power quality is getting higher and higher. Therefore, it is necessary to deeply understand and master the power quality of typical loads in high-density power supply areas in order to improve the power supply quality and improve the security and reliability of the power grid. This paper classifies the common load in the high-density power supply area, analyzes the power characteristic, the impact characteristic and the harmonic characteristic of the typical load, and studies the corresponding modeling method for each characteristic of the load. On this basis, combined with the actual situation in the high-density power supply area of Xiaoshan Power Grid, the typical load power quality monitoring points are selected and the actual running electrical quantities of each measuring point are collected by using the power quality analyzer. The power quality and electrical operation characteristics of urban intelligent distribution network with high density power supply are analyzed. Finally, the power quality of typical load measuring points in high density power supply area of Xiaoshan power network is comprehensively evaluated. Based on the compensation characteristics of flexible distribution equipment, the corresponding flexible control measures are put forward for the power quality problems of typical load measuring points. It provides a decision basis for solving the power quality problem of typical load in Xiaoshan high-density power supply area. It is helpful for the power supply department to understand the situation of the whole power network and to make a better operation plan.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM714

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