Single Terminal Transient Protection Scheme Based on Fuzzy Multi-criteria Fusion

doi:10.11930/j.issn.1004-9649.202306105

Abstract

Abstract:

The existing single-terminal transient protection schemes rely solely on single fault feature for fault identification, which leads to the poor identification reliability. This paper thus proposes a novel single-terminal transient protection scheme based on fuzzy multi-criteria fusion to achieve the complementation of the advantages of different single-terminal transient protection schemes through fuzzy multi-criteria fusion. Firstly, the characteristics and action sensitive regions of three single-terminal transient protection schemes, which are based on the ratio of high- and low-frequency transient energy, the arrival time difference of fault initial zero-mode/line-mode voltage traveling wave and the polarity relationship of initial line mode voltage traveling wave, are analyzed, and the fuzzy membership functions of corresponding criteria are constructed. Secondly, based on the advantages and disadvantages of different transient protection schemes, the above three single-terminal transient protection schemes are integrated based on fuzzy logic to achieve fault zone discrimination. Finally, based on a large number of simulation using PSCAD/EMTDC, the three transient protection schemes mentioned above and the proposed novel scheme is compared in terms of adaptability under different fault locations, different bus stray capacitance, different transition resistance and different weight coefficients, which has verified the effectiveness of the proposed novel scheme.

Key words: transient based protection, multi-criteria fusion, fuzzy logic, action sensitive region, membership function

Meiling LUO, Zixiao LI, Tao ZHENG, Xiaojun YU, Jianyun WU, Haibin XIE. Single Terminal Transient Protection Scheme Based on Fuzzy Multi-criteria Fusion[J]. Electric Power, 2024, 57(3): 60-72.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202306105

https://www.electricpower.com.cn/EN/Y2024/V57/I3/60

Figures/Tables 22

References 27

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保护方案	优点	不足
1	动作可靠	依赖边界元件
2	不依赖边界元件	区内末端故障存在死区
3	能够识别前后50%故障区段	无法识别区内外故障

保护方案	优点	不足
1	动作可靠	依赖边界元件
2	不依赖边界元件	区内末端故障存在死区
3	能够识别前后50%故障区段	无法识别区内外故障

母线杂散电容/μF	故障位置l_f	故障暂态特征量			隶属度函数值			综合隶属度函数值η	动作结果
母线杂散电容/μF	故障位置l_f	λ	∆t₀₁/ms	η₃	η₁	η₂	$\eta'_2 $	综合隶属度函数值η	方案1	方案2	新方案
0.100	0.2l_MN	0.0287	0.005	1	1	1	1	1	√	√	√
	0.8l_MN	0.0222	0.040	–1	0.910	0.951	1	0.9550	√	√	√
	0.95l_MN	0.0202	0.050	–1	0.810	0.707	1	0.9050	√	×	√
	1.05l_MN	0.0068	0.055	1	0.140	0.585	0	0.0700	×	×	×
	1.2l_MN	0.0042	0.075	1	0.010	0.098	0	0.0050	×	×	×
0.060	0.2l_MN	0.0290	0.005	1	1	1	1	1	√	√	√
	0.8l_MN	0.0219	0.040	–1	0.935	0.951	1	0.9675	√	√	√
	0.95l_MN	0.0199	0.050	–1	0.818	0.707	1	0.9090	√	×	√
	1.05l_MN	0.0114	0.055	1	0.318	0.585	0	0.1590	×	×	×
	1.2l_MN	0.0069	0.075	1	0.053	0.098	0	0.0265	×	×	×
0.006	0.2l_MN	0.0289	0.005	1	1	1	1	1	√	√	√
	0.8l_MN	0.0220	0.040	–1	0.778	0.951	1	0.8890	√	√	√
	0.95l_MN	0.0198	0.050	–1	0.533	0.707	1	0.7665	×	×	√
	1.05l_MN	0.0190	0.055	1	0.444	0.585	0	0.2220	×	×	×
	1.2l_MN	0.0160	0.075	1	0.111	0.098	0	0.0555	×	×	×

母线杂散电容/μF	故障位置l_f	故障暂态特征量			隶属度函数值			综合隶属度函数值η	动作结果
母线杂散电容/μF	故障位置l_f	λ	∆t₀₁/ms	η₃	η₁	η₂	$\eta'_2 $	综合隶属度函数值η	方案1	方案2	新方案
0.100	0.2l_MN	0.0287	0.005	1	1	1	1	1	√	√	√
	0.8l_MN	0.0222	0.040	–1	0.910	0.951	1	0.9550	√	√	√
	0.95l_MN	0.0202	0.050	–1	0.810	0.707	1	0.9050	√	×	√
	1.05l_MN	0.0068	0.055	1	0.140	0.585	0	0.0700	×	×	×
	1.2l_MN	0.0042	0.075	1	0.010	0.098	0	0.0050	×	×	×
0.060	0.2l_MN	0.0290	0.005	1	1	1	1	1	√	√	√
	0.8l_MN	0.0219	0.040	–1	0.935	0.951	1	0.9675	√	√	√
	0.95l_MN	0.0199	0.050	–1	0.818	0.707	1	0.9090	√	×	√
	1.05l_MN	0.0114	0.055	1	0.318	0.585	0	0.1590	×	×	×
	1.2l_MN	0.0069	0.075	1	0.053	0.098	0	0.0265	×	×	×
0.006	0.2l_MN	0.0289	0.005	1	1	1	1	1	√	√	√
	0.8l_MN	0.0220	0.040	–1	0.778	0.951	1	0.8890	√	√	√
	0.95l_MN	0.0198	0.050	–1	0.533	0.707	1	0.7665	×	×	√
	1.05l_MN	0.0190	0.055	1	0.444	0.585	0	0.2220	×	×	×
	1.2l_MN	0.0160	0.075	1	0.111	0.098	0	0.0555	×	×	×

故障位置l_f	过渡电阻/Ω	故障暂态特征量			隶属度函数值			综合隶属度函数值η	动作结果
故障位置l_f	过渡电阻/Ω	λ	∆t₀₁/ms	η₃	η₁	η₂	$\eta'_2 $	综合隶属度函数值η	方案1	方案2	新方案
0.05l_MN	20	0.0330	0	1	1	1	1	1	√	√	√
0.05l_MN	100	0.0305	0	1	1	1	1	1	√	√	√
0.2l_MN	20	0.0287	0.005	1	1	1	1	1	√	√	√
0.2l_MN	100	0.0276	0.005	1	1	1	1	1	√	√	√
0.8l_MN	20	0.0222	0.040	–1	0.910	0.951	1	0.9550	√	√	√
0.8l_MN	100	0.0223	0.040	–1	0.915	0.951	1	0.9575	√	√	√
0.95l_MN	20	0.0202	0.050	–1	0.810	0.707	1	0.9050	√	×	√
0.95l_MN	100	0.0213	0.050	–1	0.865	0.707	1	0.9325	√	×	√
1.05l_MN	20	0.0068	0.055	1	0.140	0.585	0	0.0700	×	×	×
1.05l_MN	100	0.0065	0.055	1	0.125	0.585	0	0.0625	×	×	×
1.2l_MN	20	0.0042	0.075	1	0.010	0.098	0	0.0050	×	×	×
1.2l_MN	100	0.0043	0.075	1	0.015	0.098	0	0.0075	×	×	×