复合电能质量扰动下低压配电网中关键设备附加损耗的解耦分析

蒋利民; 孟珺遐; 张静; 董云霞; 尹忠东

蒋利民,孟珺遐,张静,董云霞,尹忠东.复合电能质量扰动下低压配电网中关键设备附加损耗的解耦分析[J].电测与仪表,2019,56(24):59-66.
Jiang Limin,Meng Jun-xia,Zhang Jing,Dong Yun-xia,Yin Zhong-dong.Decoupling analysis of additional loss of key equipment in low voltage distribution network under complex power disturbance[J].Electrical Measurement & Instrumentation,2019,56(24):59-66.

复合电能质量扰动下低压配电网中关键设备附加损耗的解耦分析

Decoupling analysis of additional loss of key equipment in low voltage distribution network under complex power disturbance

DOI：10.19753/j.issn1001-1390.2019.024.010

中文关键词: 复合电能质量扰动低压配电网关键设备附加损耗解耦 MATLAB/SIMULINK

英文关键词:complex power quality disturbance, low voltage distribution network, key equipment, additional losses, decoupling, MATLAB/SIMULINK

基金项目:2017年国家电网公司总部科技项目”电能质量对低压配电网的能耗影响量化评估及降损方案研究与应用”资助（YD71-17-011）

作者中文名	作者英文名	单位
蒋利民	Jiang Limin	中国电力科学研究院有限公司
孟珺遐	Meng Jun-xia	中国电力科学研究院有限公司
张静	Zhang Jing	新能源电力系统国家重点实验室（华北电力大学）
董云霞	Dong Yun-xia	新能源电力系统国家重点实验室（华北电力大学）
尹忠东	Yin Zhong-dong	新能源电力系统国家重点实验室（华北电力大学）

摘要点击次数: 1586

中文摘要:

随着智能电网的扩建、新能源的快速发展以及冲击性、非线性负荷的广泛应用，使得谐波、三相不平衡、电压偏差、电压波动和闪变等电能质量问题日趋严重。配电网在复合电能质量扰动下的损耗计算是分析线损构成、制定降损措施，实现电网经济运行的基础。目前我国配电网电能损耗中一半以上的损耗是在低压配电网中产生的。故本文理论推导了复合电能质量扰动下低压配电网中关键设备附加损耗的计算模型，并通过MATLAB/SIMULINK对其进行仿真验证。在此基础上提出了一种复合电能质量扰动的解耦方法，将复合电能质量扰动下低压配电网中关键设备的附加损耗进行解耦分析,并通过仿真验证解耦分析的正确性。这为建立各单一电能质量指标与电网附加损耗的映射关系及评估各单一电能质量指标对附加损耗的影响奠定了理论基础。

英文摘要:

With the expansion of smart grid, rapid development of new energy and extensive application of impact and nonlinear loads, the problems of power quality, such as harmonic, three-phase unbalance, voltage deviation, voltage fluctuation and flicker, are becoming more and more serious. The loss calculation of distribution network under the disturbance of composite power quality is the basis of analyzing the line loss composition, formulating the loss reduction measures and realizing the economic operation of power grid. At present, more than half of the power loss in distribution network is generated in the low-voltage distribution network. In this paper, the calculation model of loss of key equipment in low voltage distribution network under complex power quality disturbance is deduced theoretically, and it is simulated and verified by MATLAB/SIMULINK. On this basis, a decoupling method of complex power quality disturbance is proposed, which decouples the additional loss of the key equipment under the complex power quality disturbance, and the correctness of the decoupling method is verified by simulation. It lays the foundation for the establishment of the sensitivity mapping relationship between all kinds of power quality indexes and the additional loss of the power grid and the evaluation of the influence weight of each single power quality index on the additional loss.

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