37results about How to "Meet the assessment requirements" patented technology

The invention relates to a supercritical or ultra-supercritical generating set variable-load overshoot control method. According to the method, water supply overshooting and coal quantity overshooting are conducted separately, and various overshoots are intelligently generated according to a state of the generating set before the load is varied. The control method particularly comprises the following steps that 1, comparison is conducted between a load command and a real load deviation, whether the deviation is larger than a first constant value is judged, if yes, water supply overshooting is triggered, and the overshoot adopts hierarchical control; 2, comparison is conducted between a real intermediate point enthalpy value and a preset value of the enthalpy value, whether the deviation is larger than a second constant value is judged, if yes, the coal quantity overshooting is triggered, and the overshoot adopts the hierarchical control. Compared with the prior art, by means of the supercritical or ultra-supercritical generating set variable-load overshoot control method, the various overshoots are intelligently generated according to the state of the generating set before the load is varied, and load control and steam temperature control of a turbine high-pressure control valve in sliding pressure operation are well achieved.

The invention discloses a flexible DC transmission voltage source converter valve operation test device. The particular technical scheme is as follows: a test power supply is used for charging two sample valve assemblies and an assistant valve group, and a constant DC voltage control strategy is used for enabling voltage of each valve submodule to be distributed uniformly and required test voltage is achieved; a nearest level modulation strategy is adopted to generate test voltage at two ends of the two sample valves, and the two sample valves have the same DC voltage components and AC voltage components with the same amplitudes and different phases; under effects of the test voltage, the two sample valves form a closed-loop power circuit via a test reactor, the test reactor and a sample valve submodule capacitor perform electromagnetic energy exchange in the power closed-loop circuit to obtain test current, and the current contains a power frequency fundamental wave current component, a DC current component and a doubled power frequency loop current component; and the test power supply is used for energy complementation on operation loss of the test circuit, and the assistant valves are used for balancing test voltage fluctuation caused by the power grid.

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 relates to a control method for improving the area control error (ACE) response performance of a 300MW coal-fired unit. According to the control method for improving the ACE response performance of the 300MW coal-fired unit, a delaying module, an or-gate module, an and-gate module, a selecting module, an inertia link module, an addition module and a function module are included; andby improving forming logic of an load instruction of the main control side of a steam turbine, the unit load can be greater than (when the load is up) or less than (when the load is down) the load target value and can be stabilized at the load target value after two seconds, and ACE assessment requirements are met.

The invention discloses a full-automatic microfiltration membrane aperture distribution tester as well as an automatic measuring method and application thereof. The full-automatic microfiltration membrane aperture distribution tester comprises a gas supply cylinder, a gas buffer tank and a test membrane cell for fixing and sealing a microfiltration membrane, wherein the gas supply cylinder, the gas accumulator tank and the test membrane cell are successively connected via a pipeline. The full-automatic microfiltration membrane aperture distribution tester is characterized in that a motor-driven flow regulating valve is arranged between the gas supply cylinder and the gas buffer tank; the gas buffer tank is provided with a pressure probe; an outlet on the microfiltration membrane penetration side of the test membrane cell is provided with a gas flow probe; the signal output end of the pressure probe and the signal output end of the gas flow probe are connected with a data acquisition module for collecting pressure and flow signals in real time; the signals are transmitted by the communication module and a computer controller; the signal output end of the computer controller is connected with the signal input end of the motor-driven flow regulating valve; and the motor-driven flow regulating valve is under real-time feedback control. According to the full-automatic microfiltration membrane aperture distribution tester, the measuring condition can be automatically controlled in real time, measuring data is collected, data is processed in real time, and the assessment requirement on the performance of various sieve-pore filtration membranes can be satisfied.

The invention relates to a channel smooth blasting quality evaluation prediction method, comprising the following steps of 1, obtaining evaluation indexes; 2, obtaining an actual measurement evaluation index value of a section to be evaluated, and adopting a variable coefficient method and an analytic hierarchy process to obtain the comprehensive weight of each evaluation index for the total evaluation; 3, performing evaluation prediction on the smooth blasting quality by respectively using a conventional weighting method and a projection pursuit method and obtaining the comprehensive evaluation result of the smooth blasting quality of the section to be evaluated according to the evaluation prediction result obtained according to each method. Compared with the prior art, the channel smooth blasting quality evaluation prediction method has the advantages of convenience in operation, strong systematization, high practicability and the like.

The present invention provides a method, system and device for testing the heterogeneity of a mimic system based on network packet capture, including: a user unit module: sending data to be tested to a mimic scheduling module; mimic scheduler module: distributing received data to be tested To multiple heterogeneous processors, so that multiple heterogeneous processors perform calculations on the data to be tested separately, obtain the calculation results, perform a mimetic judgment on the calculation results, and output the number sequence of the heterogeneous processors with consistent calculation results to the heterogeneity identification module, and perform cleaning operations on inconsistent heterogeneous processors, and store the operation results. The present invention adds verification and identification functions for heterogeneous processor types, which is beneficial to verify the stability, security and performance rationality of heterogeneous processors more efficiently, conveniently and comprehensively, and automatically generate detailed test reports , in order to meet the evaluation requirements for the heterogeneity of the mimic security information system.

The invention discloses a hardening and tempering method of a large 34CrNiMo6 forged piece. The method is used for processing the large forged piece with the thickness being larger than or equal to 600 mm and the length being larger than or equal to 10,000 mm. The method includes the following steps of (1), quenching, specifically, the forged piece is subjected to quenching and heating with the quenching temperature being 870-880 DEG C; (2), cooling, specifically, a water-cooling and air-cooling alternative manner is adopted to cool the forged piece, and after final cooling, the surface temperature is controlled to be within 250 DEG C; (3), tempering, specifically, the temperature is raised to 590 + / -5 DEG C, and tempering and heat preservation are performed. By means of the method, the cooling and cracking phenomena of the forged piece in the water cooling process can be effectively prevented, and the optimal cooling speed can be obtained; the process is stable and high in reliability, and the performance of the forged piece meets the assessment requirements; and the phenomenon that quenching oil combustion occurs easily when oil cooling is adopted for the large forged piece can be avoided, and potential safety hazards in production are greatly lowered.

The invention discloses a test device for the vibration test of an aerial suspension launching device, which comprises a vibration table and a vibration test tool installed on the upper end of the vibration table. The base of the cage tooling and the upper cover of the cage tooling; the base of the cage tooling and the upper cover of the cage tooling are connected by bolts through the butt joint; It is connected with the adapter platform of the suspension launching device and the top of the upper cover of the cage tooling is installed with counterweights; Suspension beam fixtures are connected by bolts; air springs and linear guide bearings are arranged around the upper end of the vibrating table extension base of the vibrating table to support the vibration test fixtures. The invention can realize the purpose of checking the accuracy of the vibration test of the suspension launching device.

The invention discloses a power substation busbar voltage real-time monitoring method. The method includes the following steps of dividing the voltages of busbars into N types, and setting different voltage qualified ranges for the voltages of all types of busbars, periodically collecting the voltages of the busbars of a target power substation, and generating corresponding warning according to the collected voltages of the busbars. An existing power substation data collecting and monitoring control system is sufficiently used; on the premise of extremely less increasing hardware devices, thevoltages of the busbars of the power substation are monitored in real time mainly through software, and the assessment requirements of the State Grid Corporation of China for the voltage qualified rate can be met for the power substation at extremely low refitting cost.