Pursuant to Article 116 of the Energy Law

4.3.5.2. Step-up transformer must not be a limiting factor for delivery of the active power 
from the generation unit to the transmission grid. 
4.3.5.3. Load change for all generation units at the level of at least: 
- 4%Pnom per minute for turbo-generation units; 
- 
30%Pnom per minute for turbo-generation units; 
must be provided throughout the entire spectrum between the technical minimum and 
nominal power, as well as the stable output value of active power during these changes. 
4.3.5.4. Wind generation unit must be able to reduce nominal active power of at least 25% of 
the total installed power per minute.
4.3.6.
 
PRIMARY,
 
SECONDARY
 
AND
 
TERTIARY
 
CONTROL 
4.3.6.1. Primary control  
4.3.6.1.1. Each generation unit who
MW, 
except for those that are able to combine generation of thermal and electric power, must have 
primary control capability. 
4.3.6.1.2. Each generation unit whose nominal active power is less than 50 MW can have 
primary control capability in accordance with the agreement with the JSC EMS. 
4.3.6.1.3. Following requirements shall be applied to all generation units participating in the 
primary control: 
- primary control band must be at least ± 2%P
nom
; 
- active power characteristic – frequency of the primary control device must be 
adjustable within 4-6% range 
- 
the following values have been adopted for other values: 
a. primary control activation time: up to 2 seconds after the disturbance for 
activation of primary control, maximum 15 seconds after the disturbance for 
activation of primary control reserve, requiring engagement of 50% power of 
the primary control full control band or less, and for disturbances requiring 
engagement of primary control within 50% to 100% of a full control band, time 
limit for primary control response shall be determined linearly from 15 s to 30 s;
b. operational utility: primary reserve must be activated in full for the level of 
deviation of frequency of the quasi-stationary status 

200 MHz; 
c. duration of the primary reserve delivery is minimum 15 minutes; 
d. regulator insensitivity should not exceed 

10 MHz; 
e. metering accuracy must be better or equal to 10 MHz; 
f. blind spot of primary control has to be adjustable within the range of 0 to

20 MHz; 
g. metering cycle of generator rotation speed for primary control must not be 
longer than 0.1 s; 
h. metering cycle for tracking should be 1 second (recommended), and the 
maximum is 10 seconds.