Research On Coordinated Control System Of Ultra-supercritical Power Units

To achieve sustainable development goals of social and economic in China, the energy generation industry must adapt to new situations. Therefore, it's necessary for power generation units to improve the technology, security, stability and economy. Currently, ultra-supercritical power generation technology is advanced in area of power generation for its reliability, efficiency and environment-friendly. The relevant theory and technology strategy of ultra-supercritical unit is important to the future development of the electric power industryIn this paper, new features of ultra-supercritical power units are analyzed, and some research progresses about modeling and control system design of unit coordinated control system is summarized. Then according to fuzzy modeling theory, a T-S fuzzy model of unit plant is established by using the operation data from the field. The identification results show that the T-S fuzzy model can effectively express the input and output characteristics of ultra-supercritical power unit. In order to control the unit plant model established before, an improved generalized predictive control strategy is proposed. This control strategy takes advantage of the forecast information and simplifies the process of solving the multivariable matrix. Meanwhile, this method is applied to1000MW unit coordinated control system, simulation results show that the improved control method has better performance than the traditional generalized predictive control algorithm. Finally, the improved generalized predictive control is combined with the T-S fuzzy model of unit plant. Simulation results show that the proposed control system can follow the set value of output rapidly and has good immunity in case of interference.