Taiwan Power Company-Electricity Management Information-Major Operating Performance Indicators in the Past 10 Years

Year	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Line Loss Rate
Line Loss Rate ％	4.09	3.72	3.85	3.82	3.94	3.86	3.97	3.53	3.82	3.20
Power Supply Reliability
System Average Interruption Duration Index min/household‧year	17.496	16.268	16.274	16.898 (32.572)^*3	16.187	16.488	15.931	16.376 (43.516)^*4	14.936 (91.285)^*5	15.225
System Average Interruption Frequency Index times/household‧year	0.264	0.220	0.208	0.212 (0.553)^*3	0.227	0.209	0.230	0.233 (0.864)^*4	0.181 (0.467)^*5	0.186
Employee Productivity
Sales per employee MWh/person	9,086	8,879	9,110	9,245	9,270	9,147	9,257	9,738	9,808	9,563
Households served per employee household/person	600	589	589	599	601	594	598	610	614	620
Nuclear Power Plant Operating Efficiency
Energy Generation GWh	40,801	35,143	30,461	21,560	26,656	31,147	30,342	26,818	22,917	17,154
Number of Automatic Emergency Shutdowns times/unit	0	0.33	0.17	0.50	0.17	0	0.25	0.25	0.67	0
Thermal Power Plant Operating Efficiency
LHV gross ％	43.35	43.58	43.70	43.96	44.81	45.64	46.00	46.10	46.26	46.63
Number of electromechanical accidents times/unit	0.29	0.36	0.53	0.18	0.15	0.12	0.11	0.11	0.11	0.02
Environmental Improvement
Particulate matter (PM) Kg/GWh	27	30	28	25	21	14	8	6	5	5
SOx Kg/GWh	305	315	298	278	181	125	102	98	84	77
NOx Kg/GWh	452	448	443	412	327	234	203	188	169	160

Note：

International standards called SAIDI and SAIFI are used as the reliability indices by power utilities. The System Average Interruption Duration Index (SAIDI) is more commonly disclosed worldwide, while The System Average Interruption Frequency Index (SAIFI) is not. There are formulas for both indices but different parameter definitions within the formula in different countries.
The data listed in upper column is for the regular operation, the one in lower column is for the major incidents.
In 2017 there was 815 power outage incident, which was mainly due to the interruption of the gas supply from CPC Corporation. The SAIDI of this accident was 32.572 (minutes per household per year), and SAIFI was 0.553 (times per household per year)
In 2021 there were 513 & 517 power outage incidents, which result in SAIDI as 43.516 (minutes per household per year) and SAIFI as 0.864 (times per household per year)
In 2022 there were 313 power outage incidents, which result in SAIDI as 91.285 (minutes per household per year) and SAIFI as 0.467 (times per household per year.)

Electricity Management Information