The invention discloses a methanol combustor controller and a control method thereof. According to actually measured pressure, proportion relations among a fuel, air and an oxidant are obtained through querying a fuel, air and oxidant proportion relation pulse spectrum map, according to a difference between the actually measured pressure and boiler set target pressure, through querying a PID parameter pulse spectrum map, parameters of a PID are adjusted automatically, when the difference between the boiler set target pressure and the actually measured pressure is quite large, the PID automatically increases steplength adjustment, and when the boiler set target pressure is close to the actually measured pressure, the PID automatically decreases the steplength adjustment; a single-chip microcomputer module, based on the proportion relations among the fuel, the air and the oxidant and the PID parameters, adjusts the flow of the fuel, the air and the oxidant. According to the invention, the flow of the fuel, the air and the oxidant can be reasonably controlled, the boiler combustion efficiency is improved, and emission of harmful gas is reduced.

Methanol combustor controller and control method thereof

The invention discloses a system and a method for controlling network cascade temperature based on a trigger mechanism. The system is characterized by comprising a master controller, wherein the master controller is connected with a cascade control loop through a network; the master controller is also connected with a self-correcting controller; the cascade control loop comprises an outer circle PID (Proportion Integration Differentiation) control loop and an inner circle PID control loop; an event trigger is arranged in the outer circle PID control loop; the self-correcting controller comprises a parameter adjuster and a parameter estimator; the event trigger works through the trigger mechanism; the event trigger is used for comparing an output signal of a main transmitter with a signal sent to the master controller; if a comparison value is more than a given trigger mechanism value, the signal sent to the master controller is updated; if the comparison value is less than or equal to the given trigger mechanism value, the output signal is not updated by the master controller. The system provided by the invention has the advantages of both a cascade control structure and a network control structure and also has better adaptive capacity and robust performance.

System and method for controlling network cascade temperature based on trigger mechanism

The invention belongs to the field of automatic control, and particularly discloses a small amplitude rapid temperature control device and method. The small amplitude rapid temperature control methodcomprises the steps that a real time temperature of a controlled object is obtained, and an initial temperature of the controlled object is recorded; the purpose that the initial temperature is smaller than a set temperature related to a target temperature is responded, and the controlled object is heated; a smallest temperature in the process of heating is recorded; and the purpose that a real time temperature is larger than a sum of the smallest temperature and a float value is responded, and heating of the controlled object is stopped. According to the small amplitude rapid temperature control device and method, the temperature of the controlled object is enabled to be close to the target temperature rapidly, and a temperature overshoot value in the process of controlling can be effectively reduced.

Small amplitude rapid temperature control device and method

The invention discloses a method for improving waste heat utilization of a steam turbine unit. The method for improving the waste heat utilization of the steam turbine unit is based on coexisting surficial pipe type indirect air cooling unit and wet cooling unit of a power station; a water-water heat exchanger is arranged between the surficial pipe type indirect air cooling unit and the wet cooling unit; cooling water of the surficial pipe type indirect air cooling unit and feed water of the wet cooling unit are guided into the water-water heat exchanger to perform heat exchange; the cooling water of the surficial pipe type indirect air cooling unit is used for heating the feed water of the wet cooling unit. The method for improving the waste heat utilization of the steam turbine unit has the advantages of reasonably, effectively and reliably using the waste heat of the surficial pipe type indirect air cooling unit, reducing energy consumption of the surficial pipe type indirect air cooling unit and the wet cooling unit, increasing contribution of the wet cooling unit, reducing power generation costs of power stations by a large margin, being energy saving and environmental friendly and reliably improving earnings by a large margin.

Method for improving waste-heat utilization of steam turbine unit

The invention provides a joint air-cooling system and a control method. The joint air-cooling system comprises a steam turbine, an indirect cooling condenser and a condensation water precision processing unit. A generator is connected to the steam turbine. A direct air-cooling unit is a direct air-cooling radiator. An inlet of the direct air-cooling radiator is connected with the steam turbine, and an outlet of the direct air-cooling radiator is connected with the condensation water precision processing unit. A multi-level heater is connected to the condensation water precision processing unit. An inlet of the indirect cooling condenser is connected with the steam turbine, and an outlet of the indirect cooling condenser is connected with the multi-level heater. The indirect cooling condenser is further connected with an indirect air-cooling unit. According to the joint air-cooling system and the control method, exhausted steam of the steam turbine is distributed, a part of the exhausted steam of the steam turbine enters a direct air-cooling condenser to be subjected to heat exchanging, and the other part of the exhausted steam of the steam turbine enters the indirect cooling condenser to be subjected to heat exchanging; the back pressure of the exhausted steam of the steam turbine can be further reduced through a composite circulation cooling system, the vacuum of a machine set is improved, and then the economy of the machine set is improved.

Joint air-cooling system and control method

The invention provides a model driven PID control method and a model driven PID control device The control method comprises the following steps: obtaining the status value of a controlled object; scaling the deviation between the status value and an ideal value of the controlled object according to a predetermined proportionality coefficient to generate a scaling signal; generating an input signal according to the scaling signal and a feedback signal serving as positive feedback; generating a control signal according to the input signal and a compensation signal serving as negative feedback; and controlling the controlled object according to the control signal The model driven PID control device comprises an obtaining unit, a scaling unit, a feedback unit, a compensation unit and a control unit According to the model driven PID control method and the model driven PID control device, time required by adjustment of the controlled object can be shortened, shake of the controlled object during an adjustment process can be eliminated, and the controlled object is stable

Model driven PID control method and model driven PID control device

The utility model discloses a cooling system in a thermal power plant. The cooling system comprises a direct air cooling heat dissipation system and a wet cooling condenser, wherein the direct air cooling heat dissipation system comprises an air cooling pipe bundle and a cooling fan; the direct air cooling heat dissipation system is connected with a steam turbine exhaust pipe in the thermal power plant through an air cooling steam collecting pipe, and steam exhausted by the steam turbine exhaust pipe in the thermal power plant is cooled through the cooling fan; and the wet cooling condenser is connected with the steam turbine exhaust pipe in the thermal power plant through a steam pipeline and used for cooling steam turbine exhaust flowing to the wet cooling condenser, and the steam pipeline is provided with an electric butterfly valve for controlling the flow rate of the steam turbine exhaust flowing to the wet cooling condenser.

Cooling system in thermal power plant

The invention discloses a cooling system in a thermal power plant, and the system comprises a direct air cooling heat radiation system and a wet condenser, wherein the direct air cooling heat radiation system comprises an air cooling tube bundle and an air cooling fan, is connected with an exhaust steam pipe of a steam turbine of a thermal power plant through an air cooling steam collector, and cools the steam discharged by the exhaust steam pipe of the steam turbine in the thermal power plant through the air cooling fan; the wet condenser is connected with the exhaust steam pipe of the steam turbine in the thermal power plant through a steam pipeline, and is used for cooling the exhaust steam flowing to the steam turbine of the wet condenser; and the steam pipeline is provided with an electric butterfly valve which is used for controlling the flow rate of the exhaust steam of the steam turbine flowing to the wet condenser.

Zhonghe Gu

Papers

Model driven PID control method and model driven PID control device

Cooling system in thermal power plant

Cooling system of thermal power plant