Analysis of the Dynamic Characteristics of Options for the Automatic Load-Frequency Control System of 800 MW Power Unit
- PDF / 1,433,551 Bytes
- 5 Pages / 594 x 792 pts Page_size
- 45 Downloads / 183 Views
Vol. 54, No. 3, September, 2020
ANALYSIS OF THE DYNAMIC CHARACTERISTICS OF OPTIONS FOR THE AUTOMATIC LOAD-FREQUENCY CONTROL SYSTEM OF 800 MW POWER UNIT 1 OF THE PERM TPP ISLANDED TO ENERGIZE A POWER DISTRICT I. Z. Chernomzav,1 K. A. Nefedov,2 and V. A. Bilenko2 Translated from Élektricheskie Stantsii, No. 4, April 2020, pp. 23 – 28.
The results of using a mathematical model to study advanced algorithms for the automatic load-frequency control (ALFC) system of 800 MW Power Unit 1 of the Perm TPP islanded as part of the Perm-Zakamsky energy hub from the UES of Russia are presented. To prevent long-term oscillations of power and frequency of the power unit during power surges due to the reduced capacity of the power lines, advanced ALFC algorithms are proposed and analyzed. A criterion for the activation of these algorithms is proposed, and the optimal one is chosen. Keywords: turbine; generator; power transmission line; frequency; power.
— the output of the gas-turbine unit of the Lukoil-PNOS CHPP reduced from 97 MW to zero; — the output of the Perm CHPP-6 reduced from 106 MW to zero because of the shutdown of the CCPP; — the output of the Kama HPP reduced from 525 to 300 MW; — the output of the Perm CHPP-14 reduced from 152 to 35 MW. It should be noted that the power units of the Perm TPP are equipped with modified turbine control systems that ensure high-speed and precise turbine valve control. These power units were one of the first in Russia to be certificated for available-reserve joint primary frequency control (APFC) and assigned-reserve primary frequency control and automatic secondary frequency and power flow control (ASFPC). The Ministry of Energy of the Russian Federation ordered the InterRAO and SO UPS companies to perform simulation to establish conditions for the occurrence of longterm oscillations of frequency determined by 800 MW Power Unit 1 of the Perm TPP as the largest power source and to develop measures to prevent such disturbances. Model and Background of Block-Level Automation of Power Unit. To study the processes of interest, a model (Fig. 2) was developed combining a detailed model of the power unit and a simplified model of the grid. The model of the power unit includes a boiler, a turbine, control system hy-
Disturbance Background. Sudden and large power imbalances in the grid are most often caused by emergency disturbances leading to disconnection of some power lines. This results in a power surge in the remaining power lines, causing their overload and a decrease in the steady-state stability margin. These processes can be accompanied by high-amplitude oscillations of frequency and power if the appropriate measures have not been taken in due time. Such a disturbance occurred at the Perm-Zakamsky energy hub on June 15, 2017, which was islanded together with 800 MW Power Unit 1 of the Perm TPP. The islanding process was preceded by the disconnection of one of the two power lines with approximately equal power flows of about 350 MW from the busbars of the power unit operating at a load
Data Loading...
