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INTANGIBLE ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2021
Schedule of composition of intangible assets | The composition of the balance at December 31, 2021 and 2020 is as follow: Schedule of composition of intangible assets
|  | 2021 |  | 2020
|  | Historical cost |  | Accumulated amortization |  | Residual value |  | Historical cost |  | Accumulated amortization |  | Residual value
In service |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life defined |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary easements |  |  | 15 |  |  |  | (5 | ) |  |  | 10 |  |  |  | 13 |  |  |  | (4 | ) |  |  | 9 |
Onerous concession |  |  | 13 |  |  |  | (8 | ) |  |  | 5 |  |  |  | 19 |  |  |  | (13 | ) |  |  | 6 |
Assets of concession |  |  | 21,476 |  |  |  | (9,669 | ) |  |  | 11,807 |  |  |  | 20,781 |  |  |  | (9,107 | ) |  |  | 11,674 |
Assets of concession - GSF |  |  | 1,032 |  |  |  | (66 | ) |  |  | 966 |  |  |  | — |  |  |  | — |  |  |  | — |
Others |  |  | 78 |  |  |  | (74 | ) |  |  | 4 |  |  |  | 78 |  |  |  | (70 | ) |  |  | 8 |
|  |  | 22,614 |  |  |  | (9,822 | ) |  |  | 12,792 |  |  |  | 20,891 |  |  |  | (9,194 | ) |  |  | 11,697 |
In progress |  |  | 161 |  |  |  | — |  |  |  | 161 |  |  |  | 113 |  |  |  | — |  |  |  | 113 |
Net intangible assets |  |  | 22,775 |  |  |  | (9,822 | ) |  |  | 12,953 |  |  |  | 21,004 |  |  |  | (9,194 | ) |  |  | 11,810 |
Schedule of changes in intangible assets | Changes in Intangible assets are as follow: Schedule of changes in intangible assets
|  | 2020 |  | Additions |  | Disposals |  | Amortization |  | Transfers (1) |  | 2021
In service |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life defined |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary easements |  |  | 9 |  |  |  | — |  |  |  | — |  |  |  | (1 | ) |  |  | 2 |  |  |  | 10 |
Onerous concession |  |  | 6 |  |  |  | — |  |  |  | — |  |  |  | (1 | ) |  |  | — |  |  |  | 5 |
Assets of concession |  |  | 11,674 |  |  |  | — |  |  |  | (23 | ) |  |  | (757 | ) |  |  | 913 |  |  |  | 11,807 |
Assets of concession - GSF |  |  | — |  |  |  | 1,032 |  |  |  | — |  |  |  | (66 | ) |  |  | — |  |  |  | 966 |
Others |  |  | 8 |  |  |  | — |  |  |  | — |  |  |  | (4 | ) |  |  | — |  |  |  | 4 |
|  |  | 11,697 |  |  |  | 1,032 |  |  |  | (23 | ) |  |  | (829 | ) |  |  | 915 |  |  |  | 12,792 |
In progress |  |  | 113 |  |  |  | 51 |  |  |  | — |  |  |  | — |  |  |  | (3 | ) |  |  | 161 |
Net intangible assets |  |  | 11,810 |  |  |  | 1,083 |  |  |  | (23 | ) |  |  | (829 | ) |  |  | 912 |  |  |  | 12,953 |
| (1) | The transfers were made between concession contract assets to Intangible assets: R$902.
|  | 2019 |  | Additions |  | Disposals (1) |  | Amortization |  | Transfers (2) |  | 2020
In service |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life defined |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary easements |  |  | 8 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1 |  |  |  | 9 |
Onerous concession |  |  | 7 |  |  |  | — |  |  |  | — |  |  |  | (1 | ) |  |  | — |  |  |  | 6 |
Assets of concession |  |  | 11,517 |  |  |  | — |  |  |  | (24 | ) |  |  | (738 | ) |  |  | 919 |  |  |  | 11,674 |
Others |  |  | 10 |  |  |  | — |  |  |  | — |  |  |  | (5 | ) |  |  | 3 |  |  |  | 8 |
|  |  | 11,542 |  |  |  | — |  |  |  | (24 | ) |  |  | (744 | ) |  |  | 923 |  |  |  | 11,697 |
In progress |  |  | 82 |  |  |  | 41 |  |  |  | — |  |  |  | — |  |  |  | (10 | ) |  |  | 113 |
Net intangible assets |  |  | 11,624 |  |  |  | 41 |  |  |  | (24 | ) |  |  | (744 | ) |  |  | 913 |  |  |  | 11,810 |
(1) This includes the impairment reversal, in the amount of R$14, recognized in the Income Statement under “Other expenses”, as a result of the test of impairment of intangible assets, relating to the authorization for wind power generation granted to Volta do Rio, on December 31, 2020. More information is available on this note. (2) The transfers were made between Intangible assets, concession contract assets, financial assets and property, plant and equipment are as follows: (1) R$906 from concession contract assets to intangible assets; (2) R$2 from property, plant and equipment to intangible assets; and (3) R$5 from concession financial asset to intangible assets.
|  | 2018 |  | Additions |  | Disposals (1) |  | Amortization |  | Transfers (2) |  | 2019
In service |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life defined |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary easements |  |  | 9 |  |  |  | — |  |  |  | — |  |  |  | (1 | ) |  |  | — |  |  |  | 8 |
Onerous concession |  |  | 7 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 7 |
Assets of concession |  |  | 10,680 |  |  |  | 891 |  |  |  | (41 | ) |  |  | (698 | ) |  |  | 685 |  |  |  | 11,517 |
Others |  |  | 18 |  |  |  | 7 |  |  |  | — |  |  |  | (5 | ) |  |  | (10 | ) |  |  | 10 |
|  |  | 10,714 |  |  |  | 898 |  |  |  | (41 | ) |  |  | (704 | ) |  |  | 675 |  |  |  | 11,542 |
In progress |  |  | 63 |  |  |  | 36 |  |  |  | — |  |  |  | — |  |  |  | (17 | ) |  |  | 82 |
Net intangible assets |  |  | 10,777 |  |  |  | 934 |  |  |  | (41 | ) |  |  | (704 | ) |  |  | 658 |  |  |  | 11,624 |
| (1) | This includes the impairment, in the amount of R$22 recognized in the Income Statement under “Other expenses”. The test of impairment of intangible assets, relating to the authorization for wind power generation granted to Volta do Rio, recognized in 2018 as part of the its business combination, arises from non-achievement of the operational performance expected in 2019 for the wind generation assets of the subsidiary. The Value in Use of the assets was calculated based on the projection of future expected cash flows for the operation of the assets of the subsidiary, brought to present value by the weighted average cost of capital defined for the company’s activity, using the Firm Cash Flow (FCFF) methodology.
| (2) | The transfers were made between Intangible assets, concession contract assets and property, plant and equipment are as follows: (1) R$685 from concession contract assets to intangible assets; (2) (R$4) from intangible assets to property, plant and equipment and; and (3) (R$23) from intangible assets to concession financial assets.
The main amortization rates, which take into account the useful life that management expects for the asset, and reflect the expected pattern of their consumption, are as follows: | The main amortization rates, which take into account the useful life that management expects for the asset, and reflect the expected pattern of their consumption, are as follows:
Energy |  | (%) |  | Administration |  | (%)
System cable – below 69 KV |  |  | 6.67 |  |  | Software |  |  | 20.00 |
System cable – below 69 KV |  |  | 3.57 |  |  | Vehicles |  |  | 14.29 |
Structure – Posts |  |  | 3.57 |  |  | General equipment |  |  | 6.25 |
Overhead distribution transformer |  |  | 4.00 |  |  | Buildings |  |  | 3.33 |
Circuit breaker – up to 69 kV |  |  | 3.03 |  |  |  |  |  |  |
Capacitor bank – up to 69 kV |  |  | 6.67 |  |  |  |  |  |  |
Voltage regulator – up to 69 kV |  |  | 4.35 |  |  |  |  |  |  |
Gas |  | (%) |  | Administration |  | (%)
Tubing |  |  | 3.33 |  |  | Software |  |  | 20.00 |
Buildings, works and improvements |  |  | 4.00 |  |  | Vehicles |  |  | 20.00 |
Improvements in leased properties |  |  | 10.00 |  |  | Data processing equipment |  |  | 20.00 |
Machinery and equipment |  |  | 5.00 a 20.00 |  |  | Furniture |  |  | 10.00 |
The annual average amortization rate is 3.94%. The segregation by activity is as follows:
Hydroelectric Generation |  | Wind Power Generation |  | Gas |  | Distribution |  | Administration
| 7.44 | % |  |  | 8.81 | % |  |  | 3.33 | % |  |  | 3.83 | % |  |  | 15.82 | %
Schedule of power plant | Schedule of power plant
Power Plant |  | Intangible assets – Right to extension of concession |  | End of concession |  | Extension in years |  | New end of concession
Cemig Geração Camargos |  |  | 9 |  |  |  | 01/05/2046 |  |  |  | 7 |  |  |  | 01/03/2053 |
Cemig Geração Itutinga |  |  | 8 |  |  |  | 01/05/2046 |  |  |  | 7 |  |  |  | 01/03/2053 |
Cemig Geração Leste |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |
Dona Rita |  |  | — |  |  |  | 07/03/2046 |  |  |  | 4 |  |  |  | 07/19/2050 |
Ervalia |  |  | — |  |  |  | 07/03/2046 |  |  |  | 0.8 |  |  |  | 04/19/2047 |
Neblina |  |  | — |  |  |  | 07/03/2046 |  |  |  | 0.8 |  |  |  | 04/19/2047 |
Peti |  |  | — |  |  |  | 01/05/2046 |  |  |  | 7 |  |  |  | 01/03/2053 |
Sinceridade |  |  | — |  |  |  | 07/03/2046 |  |  |  | 0.7 |  |  |  | 03/12/2047 |
Tronqueiras |  |  | — |  |  |  | 01/05/2046 |  |  |  | 1 |  |  |  | 12/26/2046 |
Cemig Geração Oeste |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |
Cajuru (Cemig) |  |  | — |  |  |  | 01/05/2046 |  |  |  | 7 |  |  |  | 01/03/2053 |
Cemig Geração Salto Grande |  |  | 40 |  |  |  | 01/05/2046 |  |  |  | 7 |  |  |  | 01/03/2053 |
Cemig Geração Sul |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |
Coronel Domiciano |  |  | — |  |  |  | 07/03/2046 |  |  |  | 0.8 |  |  |  | 04/11/2047 |
Joasal |  |  | 1 |  |  |  | 01/05/2046 |  |  |  | 7 |  |  |  | 01/03/2053 |
Marmelos |  |  | — |  |  |  | 01/05/2046 |  |  |  | 7 |  |  |  | 01/03/2053 |
Paciencia |  |  | — |  |  |  | 01/05/2046 |  |  |  | 7 |  |  |  | 01/03/2053 |
Piau |  |  | 1 |  |  |  | 01/05/2046 |  |  |  | 7 |  |  |  | 01/03/2053 |
Cemig Geração Três Marias |  |  | 116 |  |  |  | 01/05/2046 |  |  |  | 7 |  |  |  | 01/03/2053 |
Cemig Poço Fundo |  |  | 1 |  |  |  | 05/29/2045 |  |  |  | 7 |  |  |  | 05/27/2052 |
Cemig PCH (Pai Joaquim) |  |  | — |  |  |  | 04/04/2032 |  |  |  | 0.4 |  |  |  | 09/14/2032 |
Horizontes |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |
Machado Mineiro |  |  | — |  |  |  | 07/08/2025 |  |  |  | 1.9 |  |  |  | 05/21/2027 |
Rosal |  |  | 9 |  |  |  | 05/08/2032 |  |  |  | 3.6 |  |  |  | 12/13/2035 |
Sá Carvalho |  |  | 39 |  |  |  | 12/01/2024 |  |  |  | 1.7 |  |  |  | 08/27/2026 |
Total |  |  | 226 |  |  |  |  |  |  |  |  |  |  |  |  |
Nova Ponte |  |  | 255 |  |  |  | 07/23/2025 |  |  |  | 2.1 |  |  |  | 08/11/2027 |
Irapé |  |  | 105 |  |  |  | 02/28/2035 |  |  |  | 2.6 |  |  |  | 09/18/2037 |
Queimado |  |  | 19 |  |  |  | 12/18/2032 |  |  |  | 1.8 |  |  |  | 06/26//2034 |
Sao Bernardo (Cemig) |  |  | 1 |  |  |  | 08/19/2025 |  |  |  | 1.9 |  |  |  | 06/27/2027 |
Emborcação |  |  | 426 |  |  |  | 07/23/2025 |  |  |  | 1.8 |  |  |  | 05/26/2027 |
Total Cemig GT |  |  | 806 |  |  |  |  |  |  |  |  |  |  |  |  |
Total (R$) |  |  | 1,032 |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of power plant offer for tender | Schedule of power plant offer for tender
Cemig Geração - Plant re-offered for tender |  | Amount
São Simão |  |  | 783 |
Miranda |  |  | 145 |
Jaguara |  |  | 237 |
Volta Grande |  |  | 157 |
Total |  |  | 1,322 |

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