Active tracking optimization control system used for grid-connection type solid oxide fuel cell

Abstract

The invention discloses an active tracking optimization control system used for a grid-connection type solid oxide fuel cell. The active tracking optimization control system comprises a set points optimizer (SPO), a voltage source inverter (VSI), a solid oxide fuel cell (SOFC) system and an L1-MPC (L1 adaptive-model predictive controller). The set points optimizer receives a power grid dispatchingactive power output instruction and obtains the optimal voltage and current values according to the instruction and an SOFC steady state mathematical model; by virtue of the optimal values, the heatpower consumed on the internal resistor of the system is the minimum; the voltage source inverter adopts the optimal current value as a reference value to enable the output current of the SOFC to track the reference value; the L1-MPC adopts the optimal voltage value and the SOFC optimal fuel utilization rate as the reference values, and stably controls the output voltage of the SOFC and the fuel utilization rate to be the reference values by controlling the positive electrode fuel flow and negative electrode air flow.

Description

technical field [0001] The invention belongs to the field of thermal power engineering and automatic control, and relates to a solid oxide fuel cell (SOFC) active power tracking regulation control system, in particular to a combination of set value optimization and L1-MPC control algorithm for SOFC active power Optimal control system for power tracking. Background technique [0002] Solid oxide fuel cell (Solid Oxide Fuel Cell, referred to as SOFC), as a new type of energy conversion device, is considered to be a promising future that can be combined with hydrogen energy storage technology due to its high efficiency in chemical energy-electrical energy conversion. Distributed power generation technology with application prospects. [0003] In the main body of SOFC, fuel and air are passed into the anode and cathode of the battery respectively, and the electrochemical reaction that occurs inside the SOFC: [0004] Anode: 2H 2 +2O 2- →2 H 2O+4e - [0005] Cathode:O 2 +...

AI Technical Summary

Problems solved by technology

Second, its dynamic characteristics present strong nonlinearity, which makes the performance of the traditional linear PID controller (Proportion Integration Differentiation. To ensure the safety and stability of the operation, a more conservative control parameter design must be designed, which contradicts the requirements of power fast tracking

Third, when the SOFC operates under variable conditions, transient fuel shortages are prone to occur, causing permanent irreversible damage to the fuel cell body and reducing its operating life

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