电力环保型混合绝缘气体配气方法优化

doi:10.11930/j.issn.1004-9649.202312056

摘要/Abstract

摘要：

目前电力系统环保型SF₆/CF₄混合绝缘气体在GIS设备上的配气成本较高，现场选择过充SF₆气体以保证其绝缘和灭弧性能，不符合使用该混合气体以实现环保和防液化的目的。为此，提出了基于单一质量流量控制器的环保型SF₆/CF₄混合绝缘气体分时段交替配气优化方法。通过分时段交替配气即时混匀技术，分析并优化了源于共用气路管道残余气体导致的配气误差，研究了SF₆气体输出时间修正技术及最末时段时间再分配方法，进一步降低了充入气体混合比误差。模拟实验表明，该方法的即时混合比与24 h后混合比相对于目标值偏差均小于±0.5个百分点，符合DL/T 2243—2021标准要求。

关键词: SF₆/CF₄混合气体, 分时段交替配气, 混合比误差控制, 即时混匀

Abstract:

The state-of-art cost of environmental-friendly SF₆/CF₄ mixed insulating gas of GIS equipment in the power system is relatively high. In order to ensure its insulation and arc extinguishing performance, SF₆ gas is overfilled on site, which is not in line with the purpose of using the mixed gas to achieve environmental protection and prevent liquefaction. Therefore, an optimized method of timed alternate gas blending for environmental-friendly SF₆/CF₄ mixed insulating gas based on a single mass flow controller is proposed. Through the timed alternate gas blending and instant mixing technology, the gas blending error caused by residual gas in the shared gas pipeline is analyzed and optimized. The SF₆ gas output time correction technology and the time reallocation method for the last period are studied, further reducing the error in the mixing ratio of the filled gas. Simulation experiments show that the deviation of the instantaneous mixing ratio and the mixing ratio after 24 hours from the target value is less than ±0.5%, which meets the requirements of DL/T 2243—2021 standard.

Key words: SF₆/CF₄ mixed gas, alternately inflated by time, mixing ratio error control, mix instantly

董杰, 杨博, 伊国鑫, 何海川, 马乐. 电力环保型混合绝缘气体配气方法优化[J]. 中国电力, 2024, 57(6): 102-109.

Jie DONG, Bo YANG, Guoxin YI, Haichuan HE, Le MA. Distribution Optimization Method for Power Environment-Friendly Mixed Insulation Gas[J]. Electric Power, 2024, 57(6): 102-109.

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链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202312056

https://www.electricpower.com.cn/CN/Y2024/V57/I6/102

图/表 7

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T/s	周期/轮	SF₆检测值占比/%						$ {{C_{{\text{S}}{{\text{F}}_6},{\text{0}}}}} $/%	$ {{G_{{\text{S}}{{\text{F}}_{\text{6}}},{\text{0}}}}} $/%	$ {{C_{{\text{S}}{{\text{F}}_{\text{6}}}{\text{,24}}}}} $/%	$ {{G_{{\text{S}}{{\text{F}}_{\text{6}}}{\text{,24}}}}} $/%	$ {\Delta {C_{{\text{S}}{{\text{F}}_{\text{6}}}}}} $/ 个百分点
		实验1		实验2		实验3
		0 h	24 h	0 h	24 h	0 h	24 h
10	48	59.95	60.17	60.26	60.72	61.87	62.19	60.69	1.70	61.03	1.71	0.34
20	24	56.18	57.05	56.06	56.37	55.81	56.11	56.02	0.34	56.51	0.86	0.49
30	16	53.30	53.96	52.55	53.47	53.29	54.24	53.05	0.81	53.89	0.72	0.84
40	12	51.12	53.46	52.38	53.51	51.02	52.98	51.51	1.47	53.32	0.55	1.81
60	8	48.17	52.25	48.89	52.67	50.33	52.76	49.13	2.24	52.56	0.52	3.43
80	6	47.91	51.71	46.95	51.83	44.83	51.53	46.56	3.38	51.69	0.29	5.13

T/s	周期/轮	SF₆检测值占比/%						$ {{C_{{\text{S}}{{\text{F}}_6},{\text{0}}}}} $/%	$ {{G_{{\text{S}}{{\text{F}}_{\text{6}}},{\text{0}}}}} $/%	$ {{C_{{\text{S}}{{\text{F}}_{\text{6}}}{\text{,24}}}}} $/%	$ {{G_{{\text{S}}{{\text{F}}_{\text{6}}}{\text{,24}}}}} $/%	$ {\Delta {C_{{\text{S}}{{\text{F}}_{\text{6}}}}}} $/ 个百分点
		实验1		实验2		实验3
		0 h	24 h	0 h	24 h	0 h	24 h
10	48	59.95	60.17	60.26	60.72	61.87	62.19	60.69	1.70	61.03	1.71	0.34
20	24	56.18	57.05	56.06	56.37	55.81	56.11	56.02	0.34	56.51	0.86	0.49
30	16	53.30	53.96	52.55	53.47	53.29	54.24	53.05	0.81	53.89	0.72	0.84
40	12	51.12	53.46	52.38	53.51	51.02	52.98	51.51	1.47	53.32	0.55	1.81
60	8	48.17	52.25	48.89	52.67	50.33	52.76	49.13	2.24	52.56	0.52	3.43
80	6	47.91	51.71	46.95	51.83	44.83	51.53	46.56	3.38	51.69	0.29	5.13

周期/s	混合比理论计算值/%	24 h后混合比试验结果/%	差值/ 个百分点
10	61.95	61.03	0.92
20	56.10	56.51	−0.41
30	54.21	53.89	0.32
40	53.28	53.32	−0.04
60	52.36	52.56	−0.20
80	51.90	51.69	0.21

周期/s	混合比理论计算值/%	24 h后混合比试验结果/%	差值/ 个百分点
10	61.95	61.03	0.92
20	56.10	56.51	−0.41
30	54.21	53.89	0.32
40	53.28	53.32	−0.04
60	52.36	52.56	−0.20
80	51.90	51.69	0.21

T/s	周期数	SF₆检测值占比/%						$ {{C_{{\text{S}}{{\text{F}}_{\text{6}}}{\text{,0}}}}} $/%	$ {{G_{{\text{S}}{{\text{F}}_{\text{6}}}{\text{,0}}}}} $/%	$ {{C_{{\text{S}}{{\text{F}}_{\text{6}}},24}}} $/%	$ {{G_{{\text{S}}{{\text{F}}_6},24}}} $/%	$ {\Delta {C_{{\text{S}}{{\text{F}}_{\text{6}}}}}} $/ 百分点
		实验1		实验2		实验3
		0 h	24 h	0 h	24 h	0 h	24 h
10	48	51.15	51.37	50.26	50.52	51.47	51.89	50.96	1.23	51.26	1.35	0.30
20	24	49.45	50.03	49.46	49.74	49.13	49.31	49.35	0.38	49.69	0.73	0.35
30	18	49.07	49.73	49.75	50.37	48.87	50.26	49.23	0.94	50.12	0.68	0.89