30results about How to "Simple on-site commissioning process" patented technology

The invention relates to a thermal power generating unit coal feed amount control method based on frequency modulation and peak regulation of a power grid. The method includes the following steps that a thermal power generating unit coal feed amount control loop interface based on frequency modulation and peak regulation of the power grid is added to a logical configuration coal feed amount control loop of an original coordination control system; logical configuration of a thermal power generating unit coal feed amount control loop based on frequency modulation and peak regulation of the power grid is carried out, and output of the logical configuration of the thermal power generating unit coal feed amount control loop based on frequency modulation is introduced to the thermal power generating unit coal feed amount control loop interface based on frequency modulation and peak regulation of the power grid to serve as feedforward signals for controlling the coal feed amount; the control system is put into actual operation, according to the real-time operation curve, relevant parameters of the thermal power generating unit coal feed amount control loop based on frequency modulation and peak regulation of the power grid are set online, and finally the expected control effect is achieved. By means of the existing DCS coordination control system, the real time performance is good, the on-site debugging process is simple, and project realization is facilitated. By judging the operating state of the unit, the coal feed amounts of the unit in different operation states are accurately controlled, fast load response of the unit participating in frequency modulation and peak regulation and the stability of main parameters are guaranteed, the labor intensity of operators is reduced, and the safety and the economical efficiency of operation of the unit are greatly improved.

The invention relates to a flow characteristic correction method for a steam turbine high pressure control valve of a thermal power generating unit. The flow characteristic correction method comprises the following steps: additionally arranging a flow characteristic correction control loop interface of the steam turbine high pressure control valve of the thermal power generating unit in the logical configuration comprehensive valve position control loop of an original steam turbine digital electric hydraulic control system; carrying out the logical configuration of a flow characteristic correction control loop of the steam turbine high pressure control valve of the thermal power generating unit, and outputting and introducing the logical configuration into the flow characteristic correction loop interface of the steam turbine high pressure control valve of the thermal power generating unit as the offset correction signal of a comprehensive valve position command; putting a control system into actual operation, setting relevant parameters of the flow characteristic correction control loop of the steam turbine high pressure control valve of the thermal power generating unit on line according to a real-time operation curve, and finally achieving a prospective control effect. The opening of the steam turbine high pressure control valve when the unit participates in frequency modulation and peak modulation corresponds to the linearity of main steam flow, so that the equipment potential is fully developed, and the stability of main parameters is guaranteed while the frequency modulation and peak modulation requirements of a power grid are met.

The invention belongs to the technical field of automatic control of a thermal power generator set and especially relates to a drum boiler thermal power generator set primary frequency modulation control optimization method. The method can be used for primary frequency modulation automatic control of the drum boiler thermal power generator set in the actual operation process, thereby ensuring that primary frequency modulation load is controlled within a reasonable range automatically in the operation process of the thermal power generator set. The method comprises adding a primary frequency modulation boiler master control feed-forward correction control logic, a primary frequency modulation turbine master control feed-forward correction control logic, a primary frequency modulation steam turbine digital electric hydraulic control system DEH correction coefficient control logic and a primary frequency modulation turbine extraction steam amount correction control logic to control logic configuration of a drum boiler thermal power generator set distributed control system DCS. The method can reduce labor intensity of personnel, and the control effect is not dependent on technical levels of operation personnel; and through an existing set distributed control system DCS coordinated control system, the method is good in real-time performance, simple in field debugging process and convenient for engineering realization.

The invention relates to a method for controlling the primary air volume of a thermal power unit based on power grid frequency modulation and peak regulation. The steps are as follows: in the logic configuration of the original coordinated control system, increase Thermal power unit primary air volume control loop interface based on power grid frequency and peak regulation; carry out logical configuration of thermal power unit primary air volume control loop based on grid frequency and peak regulation, and introduce its output to the thermal power unit primary air volume control circuit interface based on power grid frequency and peak regulation It is used as the feed-forward signal of the hot primary air main pipe pressure at the outlet of the primary fan and the primary air volume control of a single coal mill; the control system is put into actual operation, and according to the real-time operation curve, the primary air volume control loop of the thermal power unit based on frequency modulation and peak shaving of the power grid is adjusted online Relevant parameters, and finally achieve the expected effect of the control line. Through the existing DCS coordination control system, the present invention has good real-time performance, simple on-site debugging process, and is convenient for engineering realization.

The invention discloses a primary frequency modulation control method of a coal-fired unit in a steam turbine following mode, which belongs to the technical field of automatic control of the coal-fired unit and can be used for the automatic control of primary frequency modulation during the actual operation of the coal-fired unit. By adding the primary frequency modulation load pull-back control logic and adopting the closed-loop control method, the set value of the main steam pressure can be dynamically corrected in real time, which can effectively avoid the reverse adjustment of the primary frequency regulation in the steam turbine following mode, and ensure that the primary frequency regulation performance of the unit in this mode is also excellent. Rapidity and accuracy, to meet the grid assessment requirements.

The invention belongs to the technical field of automatic control of thermal generator sets, and particularly relates to a checking method for preventing failure of a thermal process protection system of a thermal generator set. The thermal process protection system comprises the following elements: design of the logic of a main protection system of the set, design of an important auxiliary engine protection system of the set, measuring and sampling by an instrument, and allocation of DCS hardware addresses; the inspection method comprises the following steps: collecting the design data of the thermal process protection system, and knowing the composition condition, the operation mode and the operation parameters of the thermal process protection system of the thermal generator set; checking the thermal process protection system of the thermal generator set by referencing to the latest national electric power industry regulations and specifications, and finding design defects and potential safety hazards; proposing a regulating solution for on-site regulation, finishing a static test and a dynamic test, and putting the thermal generator set into safe operation; and if the requirements are not met, returning to the regulation and test steps till meeting the requirement. The checking method has the advantages that the checking steps are simple and clear, the safety and the reliability are realized, the on-site debugging process is simple, and the operation and the implementation are convenient.

The invention belongs to the technical field of automatic control of thermal power generating units, and in particular relates to a coordinated control method for frequency modulation and peak regulation of heating units in all working conditions. It is used for the automatic control of the heating unit participating in frequency regulation and peak regulation of the power grid under various working conditions, ensuring that the unit can automatically control the main parameters within a reasonable range while responding quickly and stably to frequency regulation and peak regulation. Specifically, by optimizing the control logic of the distributed control system (DCS) of the heating unit, the heating unit can automatically meet the requirements of frequency regulation and peak regulation of the power grid under various working conditions. Ensure the stability and accuracy of the coordinated control of the unit when participating in frequency regulation and peak regulation and the stability and accuracy of the main steam pressure control of the heating unit under different operating conditions, give full play to the potential of the equipment, and meet the requirements of power grid frequency regulation and peak regulation at the same time , to ensure the stability of the main parameters. It effectively reduces the labor intensity of the operators, and the control effect does not depend on the technical level of the operators. It has good real-time performance, and the on-site debugging process is simple, which is convenient for engineering realization.

The invention relates to an optimizing method of air and flue gas system control after desulfurization and denitrification transformation of a thermal power generating unit. An oxygen amount allowancecontrol loop after desulfurization and denitrification transformation of the thermal power generating unit and a loop interface, a secondary air valve opening degree allowance control loop after desulfurization and denitrification transformation of the thermal power generating unit and a loop interface, an induced draft fan output allowance control loop after desulfurization and denitrification transformation of the thermal power generating unit and a loop interface as well as a booster fan output allowance control loop after desulfurization and denitrification transformation of the thermal power generating unit and a loop interface are additionally arranged in the control logical configuration of a thermal power generating unit distributed control system (DCS); air blower output interlocking control logic and secondary air valve opening degree interlocking control logic after desulfurization and denitrification transformation of the thermal power generating unit are added in the control logical configuration of the thermal power generating unit DCS; according to the real-time running curve of the control system, related parameters of various control loops for optimization of airand flue gas system control after desulfurization and denitrification transformation of the thermal power generating unit are adjusted online, and the expected control effect is realized finally. Theproblem about automatic air and flue gas system control after desulfurization and denitrification transformation of the thermal power generating unit is solved, the equipment potential is fully played, and the stability of main parameters is guaranteed.

The invention relates to a supercritical coal-fired unit platen superheater metal wall temperature early-warning optimal control method. The method comprises the steps that a platen superheater metal wall temperature control loop connector is added in a logical configuration fuel, water supply and two side platen superheater desuperheating water control loop in an original coordinated control system; platen superheater metal wall temperature control loop logical configuration is conducted and is output and led into the platen superheater metal wall temperature control loop connector to be used as feedforward signals of fuel, water supply and two side platen superheater desuperheating water control; a control system is put into actual operation, platen superheater metal wall temperature control loop parameters are adjusted and set on line according to a real-time operation curve, and the expected effect is finally achieved. According to an existing DCS coordinated control system, the supercritical coal-fired unit platen superheater metal wall temperature early-warning optimal control method is good in real-time performance, and simple in field debugging process, and can achieve engineering realization easily. Both supercritical coal-fired unit major parameters and platen superheater metal wall temperature control are automatically considered, overtemperature pipe explosion accidents of a platen superheater are effectively avoided, labor intensity is reduced, and unit operation safety and economy are improved.

The invention relates to a metal wall temperature early warning optimization control method of a high-temperature super-heater of a supercritical coal-fired unit. The metal wall temperature early warning optimization control method comprises the following steps: increasing a metal wall temperature control loop connector of the high-temperature super-heater in a logical configuration excessive desuperheating water control loop of a previous coordinated control system; carrying out logical configuration of a metal wall temperature control loop of the high-temperature super-heater and introducing an output to the metal wall temperature control loop connector of the high-temperature super-heater to be used as a feedforward signal of excessive desuperheating water control; putting a control system into actual operation; and setting relative parameters of the metal wall temperature control loop of the high-temperature super-heater online according to an actual operation curve to finally achieve the predicated control effect. According to the metal wall temperature early warning optimization control method disclosed by the invention, an existing DCS (Distributed Control System) coordinated control system is utilized, so that the instantaneity is good, a field debugging process is simple, and engineering is convenient to realize. Main parameters of the supercritical coal-fired unit and the metal wall temperature control on the high-temperature super-heater are automatically integrated so that an over-temperature pipe explosion accident of the high-temperature super-heater is effectively prevented, the labor intensity of operation personnel is reduced, and the safety and the economical efficiency of the operation of the unit are greatly improved.

The invention relates to the technical field of automatic control of thermal power units, in particular to an optimal control method for improving the reliability of bypass heating operation of the unit, comprising: when the heating thermal power unit is in the bypass heating mode, by configuring the heating thermal power unit The control logic of the decentralized control system DCS judges the failure of the bypass heating system of the unit; judges the size of the bypass heating steam flow, and performs chain protection actions in combination with the failure of the bypass heating system of the unit to ensure the safe and stable operation of the unit; adding automatic control Logic, to control the stability of the operating parameters of the unit bypass heating system; query the historical operating data and design data of the DCS of the decentralized control system of the thermal power unit, and adjust each automatic control logic parameter. The invention can realize the equipment safety of the heating unit under the condition of ensuring the heating quality, effectively reduce the labor intensity of the operating personnel, and the control effect does not depend on the technical level of the operating personnel; the real-time performance is good, the on-site debugging process is simple, and it is convenient for engineering accomplish.

The invention relates to an automatic control optimization method of an air feeder of a thermal power unit. The automatic control optimization method comprises the following steps that the feedforward control logic of a boiler total air volume PID adjuster, the upper limit and lower limit control logic of the boiler total air volume PID adjuster, the over-current protection control logic of the air feeder and the anti-stall automatic control logic of the air feeder are designed in the control logical configuration of a distributed control system (DCS) of the thermal power unit; an air feeder guide vane or a frequency converter is controlled to act correctly; the total air volume is automatically controlled within a reasonable range; and the boiler combustion requirement is met. According to the automatic control optimization method, through an existing unit distributed control system (DCS) coordinated control system, the real-time performance is good, the field debugging process is simple, and engineering realization is facilitated.

The present invention involves a multi -coal -type mixed working condition of heating units to overcome the main steam pressure fluctuation control method. The steps are as follows: Increase the following circuit interface in the control logic configuration of DCS of the heating unit decentralized control systemGive the coal volume control loop interface, overcome the air volume control circuit interface of the main steam pressure fluctuations, overcome the main steam pressure fluctuation of the main steam pressure setting value control loop interface, and overcome the main steam pressure fluctuating steam turbine high -pressure door control loop interface;In the control logic of the control system DCS, the heating unit multi -coal type mixed work conditions overcome the main steam pressure fluctuation logic configuration, and the output is introduced to the main steam pressure fluctuation circuit interface;In real -time running curve, the multi -coal type of the heating units of the heating units is the same as the mixed coal type of the heating unit overcome the relevant parameters of the control circuit of the main steam pressure fluctuations, and finally achieve the expected control effect.The invention coordinate the control system through the existing heating unit DCS DCS. It is good in real -time and the on -site debugging process is simple to facilitate the implementation of the project.

The invention relates to the technical field of automatic control methods, in particular to a coal feeding amount optimization control method for unit bypass heat supply. Through optimizing a coal feeding amount instruction control logic of a heat supply unit dispersion control system (DCS), the heat supply quality of the heat supply unit can be ensured to automatically meet the frequency modulation and peak modulation requirements of a power grid under the bypass heat supply working condition. The method comprises the steps that the coal feeding amount instruction automatic control logic of the unit bypass heat supply is designed; a configuration heat supply load converting coal feeding amount instruction automatic control logic is formed; a configuration unit load corresponding coal feeding amount instruction automatic control logic is formed; a configuration load change dynamic coal feeding amount instruction automatic control logic is formed; a configuration main steam pressure correcting coal feeding amount instruction automatic control logic is formed; and the DCS historical operation data of the unit are inquired. According to the existing unit DCS coal feeding amount control system, the frequency modulation and peak modulation requirements of the power grid can be automatically met by the heat supply unit under the condition that the heat supply quality is ensured; andthe labor intensity of operators is reduced, the real-time performance is good, the field debugging process is simple, and engineering implementation is facilitated.