CN-118601729-B - Protection method for single-cylinder temperature multi-threshold hierarchical early warning of gas generator set

CN118601729BCN 118601729 BCN118601729 BCN 118601729BCN-118601729-B

Abstract

The invention discloses a protection method for single-cylinder temperature multi-threshold hierarchical early warning of a gas generating set, which comprises single-cylinder temperature high-four-threshold four-level early warning protection and single-cylinder temperature low-two-threshold two-level early warning protection, wherein the single-cylinder temperature high-four-threshold four-level early warning protection comprises an alarm prompting program, a power-down running program, an unloading stopping program and an emergency stopping program, the single-cylinder temperature low-two-threshold two-level early warning protection comprises an alarm prompting program and a power-down running program, and the protection method for single-cylinder temperature multi-threshold hierarchical early warning of the gas generating set uses single-cylinder temperature high-and single-cylinder temperature low-two-way multi-threshold hierarchical early warning protection, has high protection precision and clear protection level, can effectively prevent the protection from being too light or the protection from being too heavy, and ensures the running safety of the gas generating set.

Inventors

XU DAWEI
WU FENGWEI
QIN BINGJIA
REN XIAOHUI
WANG LIN
XIAO DAWEI

Assignees

河南柴油机重工有限责任公司

Dates

Publication Date: 20260512
Application Date: 20240523

Claims (4)

1. The protection method for single-cylinder temperature multi-threshold hierarchical early warning of the gas generator set is characterized by comprising single-cylinder temperature high-four-threshold four-level early warning protection and single-cylinder temperature low-two-threshold two-level early warning protection, wherein the single-cylinder temperature high-four-threshold four-level early warning protection comprises an alarm prompt program, a power-down running program, an unloading shutdown program and an emergency shutdown program, and the single-cylinder temperature low-two-threshold two-level early warning protection comprises an alarm prompt program and a power-down running program; The single-cylinder temperature is greater than or equal to a high-temperature alarm prompt threshold, no matter the unit is empty or loaded, the protection delay is activated, if the single-cylinder temperature in the protection delay range is smaller than the alarm prompt threshold, the protection delay is reset to zero, no alarm prompt is output, and the unit continues to operate in the current state; if the protection delay is reached, the single-cylinder temperature is greater than or equal to the alarm prompt threshold and less than the high-temperature power-down operation threshold, the programmable control system activates the alarm prompt and sends out an audible and visual alarm; The single-cylinder temperature is greater than or equal to the temperature high power-reducing operation threshold value and is smaller than the temperature high unloading shutdown threshold value, and if the unit no-load or the unit operation power is less than or equal to 30% of the rated power of the unit at the moment, the programmable control system only activates the alarm prompt output; If the unit running power is greater than 30% of the unit rated power at the moment, the programmable control system activates the power-reducing operation, the alarm prompt is output, meanwhile, the set power of the unit is assigned to 30% of the unit rated power by the programmable control system, and the programmable control system controls the unit running power to gradually reduce to the set power of the unit within 45 seconds, namely 30% of the set rated power runs; The unloading shutdown program in the single-cylinder high temperature is that the single-cylinder temperature is more than or equal to a high-temperature unloading shutdown threshold value and less than a high-temperature emergency shutdown threshold value, and if the unit is empty or the unit running power is less than or equal to 30% of the unit rated power at the moment, the programmable control system only activates the alarm prompt output; If the unit running power is greater than 30% of the unit rated power at this moment, the programmable control system activates load-reducing stopping, alarm prompts are output, meanwhile, the set power of the unit is assigned to 10% of the unit rated power by the programmable control system, the programmable control system controls the unit running power to gradually reduce to the set power of the unit within 60 seconds, namely 10% of the unit rated power, and after the unit running power is reduced to 10% of the unit rated power, the programmable control system controls the machine components to switch off and stop.
2. The protection method for single-cylinder temperature multi-threshold hierarchical early warning of the gas generator set is characterized in that when the single-cylinder temperature is higher than or equal to the high-temperature emergency shutdown threshold, no matter the set is unloaded or loaded, the programmable control system outputs an alarm prompt, and simultaneously sends out an emergency shutdown control signal to control the set flow valve to be closed, the speed regulating valve to be closed, the ignition system to stop ignition, the gas branch pipeline to be closed, and the set to be in emergency shutdown.
3. The protection method for single-cylinder temperature multi-threshold hierarchical early warning of the gas generator set is characterized in that the single-cylinder temperature low warning prompt program is that the single-cylinder temperature is smaller than or equal to a low-temperature warning prompt threshold, no matter the set is unloaded or loaded, the protection delay is activated, the protection delay is 3s, if the single-cylinder temperature within the protection delay 3s is larger than the low-temperature warning prompt threshold, the protection delay is reset to zero, no warning prompt is output, and the set continues to operate in the current state; If the protection delay reaches 3s, the single-cylinder temperature is smaller than or equal to the low-temperature alarm prompt threshold and is larger than the low-temperature work-reduction operation threshold, the programmable control system activates the alarm prompt and gives out sound and light alarm.
4. The protection method for single-cylinder temperature multi-threshold hierarchical early warning of the gas generator set is characterized in that the single-cylinder temperature low power-reducing operation program is that the single-cylinder temperature is smaller than or equal to a temperature low power-reducing operation threshold, and if the set no-load or set operation power is smaller than or equal to 30% of the set rated power at the moment, a programmable control system only activates alarm prompt output; If the unit running power is greater than 30% of the unit rated power at this moment, the programmable control system activates the power-down running, the alarm prompts are output, meanwhile, the set power of the unit is assigned to 30% of the unit rated power by the programmable control system, and the programmable control system controls the unit running power to gradually decrease to the set power of the unit within 45s, namely 30% of the set rated power.

Description

Protection method for single-cylinder temperature multi-threshold hierarchical early warning of gas generator set Technical Field The invention relates to the technical field of gas generator sets, in particular to a protection method for single-cylinder temperature multi-threshold grading early warning of a gas generator set. Background In the operation of the gas generator set, the stability, reliability and safety of the operation of the gas generator set are directly affected by the too high or too low temperature of the single cylinder. The temperature of a single cylinder is too high, which can damage a lubricating oil film of a cylinder wall, reduce lubricating performance and accelerate abrasion of parts, the piston and a piston ring in the cylinder expand to damage fit clearance due to the too high temperature, so that abrasion resistance is increased, phenomena of cylinder pulling, seizure, body damage and the like can occur when the temperature of the single cylinder is serious, the temperature of the single cylinder is too low, which is generally accompanied by poor ignition and work in the cylinder, so that work load in other cylinders is increased, abnormal abrasion of a gas engine is accelerated, vibration of a gas generator set is increased easily, and phenomena of cylinder pulling, seizure, body damage and the like can also occur when the temperature of the single cylinder is serious. The current common single-cylinder temperature single-threshold protection logic implementation method is simple and convenient, but the protection precision is not high, and the over-light protection or the over-heavy protection is easy to form, so that the safe operation and the service life of the gas generator set are seriously influenced. Disclosure of Invention The invention aims to overcome the existing defects, and provides a protection method for single-cylinder temperature multi-threshold grading early warning of a gas generator set, which effectively avoids over-light protection or over-heavy protection and can effectively solve the problems in the background technology. The protection method for single-cylinder temperature multi-threshold hierarchical early warning of the gas generator set comprises single-cylinder temperature high-four-threshold four-level early warning protection and single-cylinder temperature low-two-threshold two-level early warning protection, wherein the single-cylinder temperature high-four-threshold four-level early warning protection comprises an alarm prompt program, a power-down running program, an unloading shutdown program and an emergency shutdown program, and the single-cylinder temperature low-two-threshold two-level early warning protection comprises an alarm prompt program and a power-down running program. The single-cylinder temperature is greater than or equal to the high-temperature alarm prompt threshold, no matter the unit is empty or loaded, the protection delay is activated, if the single-cylinder temperature in the protection delay range is smaller than the alarm prompt threshold, the protection delay is reset to zero, no alarm prompt output is generated, and the unit continues to operate in the current state; If the protection delay is reached, the single-cylinder temperature is greater than or equal to the alarm prompt threshold and less than the high-temperature power-down operation threshold, the programmable control system activates the alarm prompt and gives out an audible and visual alarm. As a preferable technical scheme of the invention, the single-cylinder high-temperature medium-power-reduction operation program is that the single-cylinder temperature is more than or equal to a high-temperature power-reduction operation threshold value and less than a high-temperature unloading shutdown threshold value, and if the unit is empty or the unit operation power is less than or equal to 30% of the rated power of the unit at the moment, the programmable control system only activates the alarm prompt output; If the unit running power is greater than 30% of the unit rated power at this moment, the programmable control system activates the power-down running, the alarm prompts are output, meanwhile, the set power of the unit is assigned to 30% of the unit rated power by the programmable control system, and the programmable control system controls the unit running power to gradually decrease to the set power of the unit within 45s, namely 30% of the set rated power. As a preferable technical scheme of the invention, the unloading shutdown program in single-cylinder high temperature is that the single-cylinder temperature is more than or equal to the high-temperature unloading shutdown threshold and less than the high-temperature emergency shutdown threshold, and if the unit is empty or the unit running power is less than or equal to 30% of the rated unit power at the moment, the programmable control system only activates the alarm prompt output; If the uni