Power pack system and power pack system optimization method

Abstract

The invention discloses a power pack system and a power pack system optimization method and relates to the technical field of frequency conversion applications of power station equipment. Through tracking and control of an optical efficiency of the system, energy waste phenomena such as driving of a trolley by a large horsepower during system control can be effectively avoided, namely optical operation matching between every two devices in the system can be realized at minimum power consumption, energy can be saved by 3%-8% on the basis of traditional frequency conversion control, and thus economic benefits of a power plant can be increased greatly along with energy consumption reduction; and meanwhile, the power pack system based on a full-integration optimization control strategy in the technical scheme of the application also makes for integration and intelligence upgrading of the power station equipment so as to facilitate upgrading and transformation of a whole industrial chain.

Description

technical field [0001] The invention relates to the technical field of frequency conversion application of power station equipment, in particular to a power pack system and a power pack system optimization method. Background technique [0002] At present, power station systems (such as thermal power generation systems) undergoing frequency conversion transformation generally include components such as frequency converters, motors, loads (such as fans or condensate pumps, compressors, etc.) and upper systems. In practical applications, the upper system generally sends control commands to the frequency converter to control and drive the operation of the motor, and then drive the load to work, so as to achieve the predetermined control goal. [0003] The motors and frequency conversion systems in the current thermal power plant system mainly adopt general vector control or VVVF control strategies, and these control strategies mostly work on the premise of a constant magnetic fi...

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Problems solved by technology

[0003] The motors and frequency conversion systems in the current thermal power plant system mainly adopt general vector control or VVVF control strategies, and these control strategies mostly work on the premise of a constant magnetic field control module, and for the closed loop of the entire system including the load The control is mostly operated in the PID mode, that is, after the entire control system is set and debugged, no matter whether the load changes, the control strategy of the system will not change, and then when the components in the system such as the load change , will make its power consumption larger, resulting in a waste of energy

[0004] In addition, since each device in the system is supplied discretely, the matching of the parameters of each device in the system will not be optimal, and if the load changes with the working conditions of the power plant, since the traditional control system does not have the ability to control the load including the The integration and optimization conditions of the overall key information of the system, so it is difficult to track the maximum efficiency point of the system, and in the case of large changes in load, it has many defects such as long adjustment time and unstable equipment operation, which will cause The operating efficiency of the cooling system using the traditional control strategy cannot be in the optimal state, which further leads to energy waste

[0005] At the same time, in the whole system, the output of the inverter determines the operating state of the motor, and the operating efficiency of the motor is related to the load, and the operating state of the motor determines the efficiency of the load. , motor, and load unified modeling optimization (that is, control commands can only be output according to the established program), which cannot ensure that the entire system has better working efficiency, which will further aggravate the waste of system energy

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