Does time series analysis confirms the relationship between space weather effects and the failures of electrical grids in South Poland?

Journal of Mathematics in Industry

Table 3 Electrical grids disruptions’ causes in southern Poland distribution network in January–July 2014

No.	Specified reasons disruptions’ causes in 2014	Cluster	Description of the cluster	Number of failures	% of failures
1	storm	A	meteorological effects	5195	17.2
2	ice + snow + rime			124	0.4
3	rime			197	0.7
4	rime + tree + branch			271	0.9
5	snow			154	0.5
6	snow + tree + branch			30	0.1
7	wind			1272	4.2
8	wind + tree + branch			1761	5.8
			Total A	9004	29.8
9	protection devices	B	operational shutdowns	1065	3.5
10	switching			3800	12.6
11	planned breaks			3924	13.0
12	another operator			337	1.1
13	works of own brigades			38	0.1
14	open object			193	0.6
15	closed object			160	0.5
16	at the recipient			69	0.2
17	in order to save people			1	0.0
18	switching activities			6	0.0
19	assembly defects			110	0.4
			Total B	9703	32.0
20	charges, theft, disassembly	C	vandalism	410	1.4
21	cutting down trees/other parties			132	0.4
22	fire			105	0.3
23	digging			145	0.5
			Total C	792	2.6
24	aging	D	aging	3135	10.4
25	local impairment of insulation	D	aging	3074	10.2
			Total D	6209	20.6
26	fuse	E	electronics devices	1	0.0
27	power system protection automation and telemechanics			1178	3.9
28	secondary circuits and power			2	0.0
			Total E	1181	3.91
29	unidentified	F	unidentified	3266	10.8
			TOTAL	30,155	100.0