Abstract
Taking a 350 MW supercritical extraction steam turbine as the object, the static decoupling control matrix of electrical load and heat load was determined according to its assembly drawing and working condition diagram. A simulation model of thermo-electric decoupling control system and its regulation objects was built based on the idea of modular modeling. The control characteristics of the connected and the non-connected regulation systems were simulated. Results show that the demand of electrical load change can be met by adjusting the opening of the high-pressure regulating valve and butterfly valve when the electrical load is disturbed. The static interference of the electrical load to the heat load is eliminated due to the integral action of the pressure PI controller. When the heat load is disturbed, the static interference of the heat load to the electrical load is eliminated due to the function of decoupling control. The application of connected regulation system can reduce the dynamic interference, shorten the transition process, improve the dynamic response characteristics, and finally realize the static decoupling control between the heat and the electrical loads.
| Translated title of the contribution | Study on Decoupling Control Characteristics of Supercritical Extraction Steam Turbine |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 201-207 and 213 |
| Journal | Dongli Gongcheng Xuebao/Journal of Chinese Society of Power Engineering |
| Volume | 41 |
| Issue number | 3 |
| DOIs | |
| State | Published - 15 Mar 2021 |