Direct energy balance and coordination control system for supercritical thermal power generating unit

Abstract

The invention discloses a direct energy balance and coordination control system for a supercritical thermal power generating unit. Direct energy balance and coordination control starts changing in load from the maximum speed, power generation control and boiler control are decoupled completely, and procedural randomness of overburnt or underburnt is minimized. The direct energy balance and coordination control system for the supercritical thermal power generating unit is realized by the following technical scheme that a boiler receives the input signals of a water feed control module, a fuel control module and an air flow control module and provides output signals to an energy balance signal module and a voltage compensation module; a demand limit regulator receives the input signals of the voltage compensation module, the water feed control module, the fuel control module and the air flow control module and provides output signals to a turbine monitoring module and a boiler input coordination module; and the energy balance signal module receives the input signal of a turbine and provides output signals to a power source control module and a dynamic compensation module.

Description

technical field [0001] The invention relates to a direct energy balance coordination control circuit, in particular to a direct energy balance coordination control system for a supercritical thermal power unit. technical background [0002] With the rapid development of China's economy, the demand for power is increasing. The country has invested a lot of money in new projects and renovation of old plants to accelerate the development of my country's power industry. Almost all well-known DCS manufacturers in the world "covet" the Chinese market, which intensifies the competition in the field. [0003] While digesting and assimilating foreign advanced technologies, our country's scientific research and technical personnel have independently innovated our own DCS system. After years of hard work, we have achieved gratifying research and application results. It has reached or is close to the DCS level of similar foreign manufacturers, but most of them are used in the renovation...

AI Technical Summary

Problems solved by technology

[0009] Since the water and steam parameters are the same above the critical point, the supercritical unit must adopt a once-through boiler, which is the main focus of the coordinated control strategy of the supercritical unit; however, the general coordinated control is often subject to various restrictions; power generation control and The boiler control cannot be completely decoupled; at the same time, the commonly used load demand signal will generate a regenerative signal when the boiler is disturbed, and the signal will be affected by the boiler disturbance

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