Analysis on Typical Small Load Electrical Characteristics of Intelligent Miniature Circuit Breaker

doi:10.16628/j.cnki.2095-8188.2021.02.009

Abstract

Abstract:

As a voltage and current measurement and control protection device,intelligent miniature circuit breaker has been widely used in low voltage clients.With the diversity and complexity of load,whether the traditional single RMS value calculation method can not meet the requirements of electrical characteristics analysis and power quality precision management.This paper measured the data of several typical small load,and based on the measured data analized the effective value and harmonic calculation,summarized the typical electrical characteristics of small load,which can improve the intelligent measurement analysis and calculation precision of the miniature circuit breaker and promote the power quality precision management under the diversified small load characteristic.

Key words: intelligent miniature circuit breaker, electrical characteristic analysis, typical small load, precise management of power quality

CLC Number:

TM561

ZHAO Jie, ZHOU Zhipeng, CHU Xiaofeng. Analysis on Typical Small Load Electrical Characteristics of Intelligent Miniature Circuit Breaker[J]. LOW VOLTAGE APPARATUS, 2021, 0(2): 45-47.

Figures/Tables 3

References 10

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谐波	计算机主机		挂式空调		小型台钻
谐波	量值	占比/%	量值	占比/%	量值	占比/%
直流	8.49	19.20	8.13	4.85	8.49	19.59
基波	44.19	100.00	167.76	100.00	43.31	100.00
2次	2.12	4.80	12.73	7.59	2.83	6.53
3次	2.12	4.80	8.84	5.27	20.51	47.35
4次	4.60	10.40	5.66	3.37	3.54	8.16
5次	5.66	12.80	26.87	16.02	6.72	15.51
6次	2.83	6.40	4.60	2.74	3.01	6.94
7次	4.95	11.20	2.47	1.48	3.36	7.76
8次	2.12	4.80	1.41	0.84	1.06	2.45
9次	4.24	9.60	2.12	1.26	1.41	3.27
10次	0.71	1.60	1.06	0.63	3.18	7.35
11次	1.41	3.20	1.77	1.05	2.47	5.71
12次	2.83	6.40	1.77	1.05	2.12	4.90
13次	3.54	8.00	2.12	1.26	2.47	5.71
14次	0.71	1.60	0.35	0.21	1.41	3.27
15次	0.71	1.60	1.06	0.63	0.35	0.82

小负载	FFT算法			均方根值计算总有效值	总有效值差值	基波有效值差值
小负载	基波有效值	总有效值		均方根值计算总有效值	总有效值差值	基波有效值差值
计算机	44.19		46.54	44.5	-2.04	0.31
挂式空调	167.76		171.03	168.5	-2.53	0.74
小型台钻	43.31		49.87	44.0	-5.87	0.69
电热水壶	387.85		388.12	390.5	2.38	2.65
电热锅	126.93		127.50	130.0	2.50	3.07
打印机	200.11		200.74	200.5	-0.24	0.39
冰箱	19.09		22.73	23.0	0.27	3.91
饮水机	105.01		105.98	105.5	-0.48	0.49
电吹冷	83.44		84.30	84.0	-0.30	0.56
电吹热	328.10		328.46	330.0	1.54	1.90

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