Preface
As an indispensable backup power source for People's Daily life and work, diesel generator is not only used in enterprises Class of public institutions provide sufficient power support, but also in hospitals, banks, airports and so on have played an important role, diesel generating units whether in urban areas or construction units have been widely used. In the period of continuous development of Internet technology, diesel generator sets can ensure the continuous and stable operation of the network, and also reduce the number of accidents caused by power failure in the construction process of the project. Therefore, diesel generator sets as backup power supply in the practice process has an important significance.
Basic working principle and application advantage of diesel generator set
1. Basic working principle of diesel generator set
A diesel engine can drive a wind turbine. The air energy that enters the diesel fuel is transferred through conversion Switch to diesel power. In the cylinder of the diesel unit, clean diesel oil is filtered by the diesel air filter The air is sufficient with the diesel fuel in the piston driven by the new high pressure diesel atomizer just ejected from inside the nozzle of the fuel injector Mixing, the volume of the new high pressure atomizing piston diesel shaft is rapidly expanded under the strong pressure current extrusion Large reduction, rapid rise in temperature, diesel atomizing piston diesel oil to the highest use of the ignition point. Because of the type of spare wood The oil motor wind drive unit is still commonly used as a backup diesel wind drive power supply, he needs Using this type of diesel motor wind driven generator set in the continuous combustion of the unit after the backup diesel motor gas To supply power, drive the diesel wind turbine set in the unit to emit the same as large administrative application mains A municipal reserve diesel electric power with important power supply properties.
2. Advantages of diesel generator set as backup power supply
(1) Startup speed
Diesel engine's automatic emergency equipment starts very quickly, generally about a few seconds at least, in normal operation should
In the emergency shutdown condition, a complete overload can be quickly achieved within at least 1 minute of emergency operation downtime
The load can be quickly brought to the load with full overload within 5 minutes or even 10 minutes in the emergency shutdown state of normal emergency equipment. However, it usually takes at least 3 hours or even 4 hours for the diesel engine and steam engine and other power devices to start or stop the emergency shutdown equipment and start the load with full overload As the operation process of the automatic emergency shutdown system of diesel engine is also very short, it can stop and start or suspend temporarily frequently.
(2) Simple operation
The operation principle and technology of daily operation equipment of diesel turbine generator set is simple, which is convenient for general equipment operation technology
Skilled personnel, required equipment operation and technical personnel less, convenient maintenance, easy maintenance during the standby power generation.
(3) Automatic function
Diesel wind turbine has a set of high reliability of diesel power supply system and power supply automation management
Yes, a fully functional automatic emergency strain power station system has four functions: automatic real-time start, automatic real-time loading, automatic real-time fault alarm and automatic safety protection. The generator set can almost run automatically normally, without any operation and maintenance personnel, and can easily realize no one on duty at any time.
(4) simple and flexible, less auxiliary equipment
Diesel steam generator set is relatively simple, less auxiliary generating equipment, small volume, light weight. Electrically at high speed
Diesel power generation, for example, is typically 80kg/kw, and diesel steam power plants are more than four times larger than the technical target of conventional diesel engines. Because the high-speed diesel engine has the basic characteristics of the generator set, so that its operation is fast and flexible, easy to move.
(5) Low fuel consumption
Diesel thermal vehicle power generation is the best low voltage thermal fuel diesel electric vehicle with the highest efficiency in the world
The effective low pressure fuel steam thermal efficiency of engine is about 30%~46%, the effective low pressure fuel steam thermal efficiency of high pressure fuel oil gas steam turbine is about 0%~ 40%, and the effective high pressure fuel oil steam efficiency of gas oil steam turbine is about 0%~ 30%. Therefore, the energy use of the thermal automobile generator set using diesel engine is higher than that of the fuel engine Low energy consumption.
Practical example analysis of diesel generator set
1. The application of diesel generator set in airport operation
The airport is an important unit of electricity, if there is no diesel generator to serve as a backup power supply,
When the power goes out at the airport, it can cause huge economic losses to the normal operation of flights. Due to the power failure, the machine
Security equipment at the airport will also be relatively disabled, which may result in some passengers simply going through baggage screening
Entering the aircraft, it is inevitable that some security accidents will occur, causing danger to other passengers in the airport. It also shadows
As a result, passengers will be stranded at the airport, which will affect their travel mood There will be resentment at the airport. In the absence of a UPS diesel generator set as a backup power source, these conditions It's going to happen.
2. The use of diesel generator set in hospitals
Hospitals generally belong to the primary important user power supply institutions, generally speaking, hospitals will use diesel power generation
The unit serves as a backup power source. If it is not a major disaster, in the case of power failure after diesel generator set The backup power supply will continue to keep the hospital working and ensure the normal operation of the hospital. Some special departments And departments are considered as advanced power units, such as operating rooms, intensive care units, hemodialysis rooms, emergency departments, etc.,
If the hospital doesn't have backup power, some patients in the emergency department who need to be on ventilators or Is the patient in the operating room, the hospital will not be able to ensure that the patient's vital signs are stable, resulting in significant Accident, threatening the patient's life safety. It can be seen that diesel generator sets play a role in hospital operation and work An important role.
3. The use of diesel generator sets in banks
The equipment used as backup power supply in the industry is generally diesel generator set, and diesel generator is used as backup electricity
Source, if the power failure occurs when taking money from the bank, can be uninterrupted power supply, can be on the load in the power failure
Zero switching power supply, the operation of bank ATM is not possible without electricity, so it will be affected by power failure.Diesel generator set as a backup power supply, the reliability of 99.9999%, can be replaced online power module, in the dimension It will be more convenient to protect, and the time will be shorter.
Third, the future development trend and practical application of diesel generator as backup power
1. Future development trend of diesel generator as backup power supply
Based on the analysis of several advantages of the current diesel power generator set, it is integrated as a backup power
The three advantages of power supply, mobile power supply and various self-provided power supply are certainly irreplaceable in the short term. With the rapid development of human economy and society, the market demand for diesel power supply will be higher, so the extensive use of various standby power sources, mobile power sources and various self-provided power sources will certainly rise. Therefore, a good grasp of the normal use of diesel power generating units and market demand will surely climb all the way up. So diesel power generator set especially as a backup power supply will be widely used.
2. Future practical application of diesel generator as backup power source
(1) For arid areas prone to severe floods, the overall construction height of the generator set should be
Keeping the water level higher than the waterlogging area can ensure that the operation of hydroelectric generating units is not affected by floods, but also can ensure a stable regional power supply, which is of great significance for timely emergency rescue work in flood disaster areas.
(2) With the continuous popularization and application of new diesel power generator sets, it is important for the production of diesel power generator
Group of equipment manufacturers in the process and product quality have high technical requirements, so in order to diesel generator set can not really play the maximum role of diesel power supply assurance, we can require diesel generator set internal complete equipment must be made of sophisticated technology and reliable.
(3) We should be able to design the maximum capacity of our new wind power generation units now
At the same time, focusing on the future design of the maximum power generation equipment capacity of the new wind units, we should be able to leave a great space for development at the same time, so that in some special emergency should be able to ensure the new power supply should be timely in some special emergency rescue disaster areas.
To sum up, diesel generator set as backup power plays an important role in life practice.
This paper discusses the basic working principle of diesel generator set, the advantages of being a backup power source, the application of diesel generator set in ship operation, the application of diesel generator set in steel mills, the future development trend of diesel generator as a backup power source, and the future practical application of diesel generator as a backup power source. To understand the time function of diesel generator set as backup power.