Cascade self-adaptive volume Kalman active-disturbance-rejection control method for improving flexible operation of thermal power generating unit

Abstract

The invention discloses a cascade self-adaptive volume Kalman active-disturbance-rejection control method for flexible operation of a thermal power generating unit. Firstly, a coordinated control system of the ultra-supercritical unit serves as a research object, and the control difficulty of the coordinated control system is analyzed. Then, a cascade self-adaptive volume Kalman active-disturbance-rejection control method is designed. Finally, the feasibility of the control method is verified based on a simulation platform, and quantitative statistical analysis is conducted on the effectiveness of the control method by adopting performance indexes. In the research object analysis, the system is simplified into a three-input three-output system, and the dynamic characteristics of the system are described more accurately. In addition, the self-adaptive volume Kalman filter with high numerical precision and high stability is cascaded with the state observer based on an error form, so that the performance of the controller is remarkably improved. The rapid load control capability of the system is improved to a great extent, and the flexible operation capability of the unit is improved.

Description

technical field

[0001] The invention relates to the technical field of coordinated control for flexible operation of thermal power generating sets, and more particularly relates to a cascade adaptive volumetric Kalman active disturbance rejection control strategy for improving the flexible operation capability of large thermal power generating sets. Background technique

[0002] In recent years, with the integration of large-scale renewable energy power generation into the grid, my country's shortage of fossil energy and environmental pollution have been effectively alleviated. But its accompanying strong randomness, volatility and intermittence seriously threaten the safety, economy and stable operation of the power grid. The Global Energy Internet Development Cooperation Organization pointed out that energy clean and low-carbon transformation and high-quality development are important starting points and focus points for implementing the new development concept. Accelerat...

Examples

Embodiment Construction

[0086] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0087] Please refer to the accompanying drawings in the figure 1 , figure 1 It is a structural diagram of unit unit load control involved in the present invention. When the external load request command arrives, the load command processing circuit will select and process it to convert it into the actual load command N that can be accepted by the safe operation of the unit unit s . The main controller of the furnace selects the load control mode that meets the operating requirements of the unit, and accepts the actual load commandN s , active power N, main steam pressure given value P s and main steam pressure P T Signal and generate turbine order (TD) and boiler order (BD) respectively sent to the steam turbine and boiler control system. The combustion control system of the boiler changes the combustion rate by adjusting the amount of fu...

technical field

[0001] The invention relates to the technical field of coordinated control for flexible operation of thermal power generating sets, and more particularly relates to a cascade adaptive volumetric Kalman active disturbance rejection control strategy for improving the flexible operation capability of large thermal power generating sets. Background technique

[0002] In recent years, with the integration of large-scale renewable energy power generation into the grid, my country's shortage of fossil energy and environmental pollution have been effectively alleviated. But its accompanying strong randomness, volatility and intermittence seriously threaten the safety, economy and stable operation of the power grid. The Global Energy Internet Development Cooperation Organization pointed out that energy clean and low-carbon transformation and high-quality development are important starting points and focus points for implementing the new development concept. Accelerat...

Examples

Embodiment Construction

[0086] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0087] Please refer to the accompanying drawings in the figure 1 , figure 1 It is a structural diagram of unit unit load control involved in the present invention. When the external load request command arrives, the load command processing circuit will select and process it to convert it into the actual load command N that can be accepted by the safe operation of the unit unit s . The main controller of the furnace selects the load control mode that meets the operating requirements of the unit, and accepts the actual load commandN s , active power N, main steam pressure given value P s and main steam pressure P T Signal and generate turbine order (TD) and boiler order (BD) respectively sent to the steam turbine and boiler control system. The combustion control system of the boiler changes the combustion rate by adjusting the amount of fu...

Images