Session: 04-03: Miscellaneous System Design Considerations

Paper Number: 64572

Start Time: August 6, 2021, 12:00 PM

64572 - Load Match-Oriented Coordinated Control for Modular High Temperature Gas-Cooled Reactor Based on Dynamic Matrix Control 

To cope with the flexibility from both load side and supply side, nuclear power generation should provide flexible operation services to improve its economic competitiveness. The prerequisite of flexible operation is the real-time realization of the operation point which is usually achieved by unit coordinated control finding the setpoints of nuclear power, coolant flow and feedwater flow to meet various load demand and keep key parameters within reasonable limits. Modular high temperature gas-cooled reactor (MHTGR) is typically a small reactor and adopt adjustable helium flow, graphite and once through steam generator (OTSG) as coolant, moderator, heat exchanger, respectively. The thermal hydraulic characteristics of MHTGR are of significant difference compared with that of pressurized water reactor (PWR). As a result, the coordinated control design for MHTGR plant is quite different from the PWR, which is simple realized by reactor average temperature and nuclear power regulation through adjusting different type control rods. In this paper, the so-called dynamic matrix control is utilized to realize the load match-oriented coordinated control for MHTGR, where the setpoints of nuclear power and helium flow are regarded as manipulated variables and modular thermal power and helium temperature are regarded as controlled variables to be optimized. Moreover, the feedwater flow is solely used to regulate the steam temperature. The effectiveness of the proposed method is then tested and verified by a hardware-in-loop simulation through a commercial distributed control system (DCS).

Presenting Author: Di Jiang Tsinghua university

Authors:

Di Jiang Tsinghua university
Zhe Dong Tsinghua university
Bowen Li Tsinghua university
Xiaojin Huang Tsinghua University