## 5 Calculation Results and Discussion  
The calculation results for the optimal structure of the power supply system for different climatic zones, taking into account the above-described differences in the prices of wood fuel and the characteristics of wind and solar radiation, are shown in Table 6 and Figures 4 and 5. The results obtained provide evidence on the feasibility of PVs only in the southern areas of the Baikal region (with solar radiation incident on a horizontal surface of above 1200-1250 kW\(\cdot\)h/m\({}^{2}\)), and GPPs and WTs prove feasible in all climatic zones. The share of WTs in the energy system is at its maximum in the center and at its minimum in the northern and southern areas, where the average wind speed rarely exceeds 3 m/s. The role of GPPs is most prominent in the north, where the main wood fuel resources are concentrated, and the price of fuel chips is minimal. In all the considered options, the DPP plays the role of a peak shaving power source to ensure an uninterrupted power supply. The power generation structure for different energy sources is shown in Figure 4.  
The operation of the optimized power supply system in dynamics is elucidated in Figure 5 (spring days in the north and south regions). We consider energy flows of energy sources hour by hour. In the first approximation, this approach is adequate, as the biomass gasification power plants with small-capacity reactors have a start-up time for the gasifier of about 20 min; the ramping rate of 1%/min; and a minimum power load of 20%. These values, however, cannot be considered constant for all downdraft gasifiers, as they depend on the size of the reaction zone, fuel and air consumption, particle sizes, and others. In addition, a gas-holder will improve the reliability of the power supply and expand the power range covered by the gasifier (including in the area of low loads) [98; 99; 100]. In northern areas with cheap wood fuel, most of the generation comes from GPPs. The role of DPPs is reduced to short one-time switching on for flexible tracking of load growth in the absence of WT generation (Figure 5a). During the hours when the WT power exceeds the load power, the electric batteries are charged, and the gas-holder is filled (in the example considered herein, this takes place in the evening and at night). The BS charging  
Figure 5: Generated capacity of energy sources: (**a**) North, and (**b**) south. and the gas-holder filling are shown in Figure 5 as negative values. During the day, the GPP power increases smoothly to the rated power, during some periods it operates together with the WT and with the discharged BS. In the southern areas (Figure 5b), the power of the WT exceeds the load power (including at night), the storage batteries are charged, and the gas-holder is filled. The PVC starts generating electricity from sunrise until sunset. Within three hours, the BS is discharged and the GPP is switched on in the baseload operating state. As the load grows, at 7 a.m., the diesel power plant is switched on and subsequently changes its power, tracking the load profile. The DPP power is minimal during periods of simultaneous operation of the WT, PV, and GPP. During the evening load increase, when the PV and WT stop their generation, the GPP and the DPP operate until the next wind speed increase, after which they can be switched off, and the next cycle of battery charging begins. Figure 6 shows the calculation data for the conditions of Lake Baikal coast under favorable conditions for PV and WT (solar radiation incident on a horizontal surface of 1300 kW-h/m\({}^{2}\) per year and multi-year average wind speed of 5 m/s), winter and summer days. The price of diesel fuel is taken equal to 500 USD/toe of fuel equivalent, the fuel price for GPP is 50 USD/toe [8; 10; 11; 96]. At night, the power of the wind turbine exceeds the load power, thus the electric batteries are charged. The gas-holder is also filled at night.