In the power system,Substation as a key hub for power transmission and distribution,The stable operation of its electrical equipment is crucial。however,Substation electrical equipment is exposed to outdoor or complex environments for a long time,Easy to accumulate dust、Dirt and other impurities。These dust deposits will not only affect the heat dissipation performance of the equipment,It may also cause partial discharge、Short circuit and other faults,Threatening the safe and stable operation of the power grid。Dry ice cleaning machine with its unique advantages,Become an efficient operating tool for dust removal of electrical equipment in substations,Provided innovative solutions for the maintenance of power equipment。

The accumulation of dust on electrical equipment in substations poses significant hazards

Deterioration of heat dissipation performance

Transformer of substation、Electrical equipment such as switchgear generates a large amount of heat during operation,Need to dissipate heat through a heat dissipation device。Dust accumulation will cover the surface of the equipment and the heat dissipation channels,Obstructing the conduction and dissipation of heat。for example,The accumulation of dust on the heat sink of the transformer will reduce the heat dissipation efficiency,Causing an increase in transformer oil temperature,Accelerate the aging of insulating oil,Shorten the service life of transformers。Long term high-temperature operation may also cause internal faults in transformers,Even causing the transformer to burn out。

Decreased insulation performance

Dust contains conductive particles and impurities,When these substances adhere to the insulation surface of electrical equipment,Will reduce insulation resistance,Increase the risk of insulation breakdown。In high-pressure environments,Local dust accumulation may lead to partial discharge phenomenon,Further damage the insulation material,Causing a short circuit fault。for example,The surface area of the insulator inside the switchgear is covered with dust,Easy to flashover in humid environments,Causing the switchgear to trip,Affects the normal power supply of the power grid。

Frequent equipment malfunctions

Dust accumulation can also affect the mechanical and electrical performance of electrical equipment。for example,In the circuit breaker、On isolation switches and other operating mechanisms,Accumulation of dust may cause mechanical components to jam、Inability of movement,Affects the normal opening and closing operations of the equipment。In current transformers、On measuring equipment such as voltage transformers,Dust accumulation can affect measurement accuracy,Causing inaccurate measurement data,Affects the monitoring and scheduling of the power system。

Working principle and unique advantages of dry ice cleaning machine

Working principle revealed

Dry ice cleaning machineUtilizing extremely low temperature dry ice pellets,Driven by compressed air,Spray at high speed onto the accumulated dust on the surface of electrical equipment in the substation。When dry ice particles collide and accumulate dust,Due to the low-temperature characteristics of dry ice,Ash accumulation will quickly become brittle。meanwhile,Dry ice sublimates into carbon dioxide gas at the moment of impact,Rapid expansion of volume,Generate strong impact force,Peel off the brittle accumulated dust from the surface of the equipment。The entire cleaning process does not require the use of water or chemicals,It is a dry cleaning method,Will not cause secondary damage to electrical equipment。

Significant advantages presented

• Efficient ash removal:Dry ice cleaning machineCapable of removing large areas of dust on the surface of electrical equipment in a short period of time,Including stubborn oil stains and carbides。Its efficient cleaning capability greatly reduces the downtime of the equipment,Improved the reliability of power supply in the power grid。for example,Cleaning of heat sinks for large transformers,Using a dry ice cleaning machine can be completed within a few hours,However, traditional methods may take several days。
• Non destructive cleaning:Dry ice pellets have lower hardness,Will not affect the metal surface of electrical equipment during the cleaning process、Scratches and damage caused by insulation materials and electronic components,Can protect the original performance and accuracy of the equipment。meanwhile,Dry ice cleaning will not affect the material and structure of the equipment,Ensure the safe operation of the equipment。
• Environmental protection and safety:Dry ice cleaningNo wastewater is generated during the process、Waste gas and residue,Will not cause pollution to the environment。not only ... but,Dry ice is made from carbon dioxide,Carbon dioxide is widely present in nature,No new harmful substances will be introduced during the cleaning process,Meets modern environmental requirements。in addition,Dry ice cleaning does not require the use of chemical agents,Avoiding the risk of operators coming into contact with harmful substances,Ensuring the health and safety of operators。
• Strong adaptability:Dry ice cleaning machineCan be applied to electrical equipment of various shapes and structures,Including complex switchgear interiors、Transformer windings, etc。meanwhile,It can be cleaned under different environmental conditions,Like high temperature、Damp and other environments,Has strong adaptability。

Efficient operation process of dry ice cleaning machine for ash removal of electrical equipment in substations

Preparation before operation

• Equipment inspection:in useDry ice cleaning machinebefore,A comprehensive inspection of the equipment is required,Ensure the normal operation of all components of the equipment,Adequate supply of compressed air,Sufficient storage capacity of dry ice。meanwhile,Check the nozzle of the cleaning machine、Is the pipeline and other components intact,No blockage or leakage phenomenon。
• safety protection :Operators need to wear personal protective equipment,Like a safety helmet、goggles、Dust mask、Insulated gloves, etc,Ensure one's own safety。meanwhile,Set up warning signs at the cleaning site,Prevent unrelated personnel from entering。
• Power outage handling:For electrical equipment that requires cleaning,Power off treatment must be carried out first,And hang it“No switching on,Someone is working”Warning signs。Ensure that the equipment is completely powered off after a complete power outage,Only then can cleaning operations be carried out。

Cleaning operation steps

• Preliminary cleaning:Use tools such as vacuum cleaners or brushes,Preliminary cleaning of large particles of dust and debris on the surface of electrical equipment,Reduce the workload of dry ice cleaning。
• Dry ice cleaning:According to the dust accumulation and structural characteristics of the equipment,Choose the appropriate nozzle and cleaning parameters。Aim the nozzle of the dry ice cleaning machine at the accumulated dust on the surface of the equipment,Maintain appropriate distance and angle,Spray dry ice pellets evenly。During the cleaning process,Pay attention to controlling the cleaning speed and intensity,Avoid causing damage to the equipment。For some difficult to clean parts,Like the corners and gaps inside the switchgear,Multiple sprays or adjusting the nozzle angle can be used for cleaning。
• Inspection and acceptance:After cleaning is completed,Conduct a comprehensive inspection of electrical equipment,Ensure that the accumulated dust has been thoroughly removed。Check if there is any damage on the surface of the equipment,Has the insulation performance returned to normal。If there are any issues,Timely handling should be carried out。

Post operation processing

• Equipment recovery:After confirming that the equipment cleaning is qualified,Remove warning signs,Restore power supply to the device。Test run the equipment,Check if the operating status of the equipment is normal。
• Equipment cleaning:Clean and maintain the dry ice cleaning machine,Clean up any remaining dry ice and dirt,Check if all components of the equipment are damaged,If there is any damage, it should be replaced in a timely manner。meanwhile,Clean up the cleaning site,Keep the site clean and tidy。

Practical application cases and effectiveness evaluation

Practical application cases

After running for a period of time, a main transformer in a certain substation,There has been an increase in oil temperature、The problem of decreased heat dissipation efficiency。After inspection,Found a large amount of dust and oil accumulation on the heat sink of the transformer。The substation has decided to use a dry ice cleaning machine to clean the heat sink of the transformer。During the cleaning process,Operators strictly follow the operating procedures for operation,Ensure cleaning effectiveness and equipment safety。After several hours of cleaning,The dust and oil stains on the heat sink of the transformer have been thoroughly removed。

Significant effect evaluation

• Improved heat dissipation performance:After cleaning,The oil temperature of the transformer has significantly decreased,The heat dissipation efficiency has been significantly improved。Under the same load conditions,The oil temperature of the transformer has decreased compared to before cleaning 5 - 8℃,Effectively extended the service life of the transformer。
• Enhanced operational stability:Due to the improvement of heat dissipation performance,The operational stability of the transformer has been enhanced,Reduced the risk of malfunctions caused by overheating。meanwhile,The operating noise of the equipment has also been significantly reduced,Improved the working environment of the substation。
• Significant economic benefits:Dry ice cleaning machineThe use of reduces the downtime and maintenance costs of transformers,Improved the reliability of power supply in the power grid。According to estimation,Save hundreds of thousands of yuan in maintenance costs and power outage losses for substations every year。