Single bus and double bus
Single bus and double bus are two different bus connection methods in the power system. Single-bus connection means that all the power supply incoming and outgoing wires are connected to the same set of buses, which is suitable for small power transformation and distribution stations with fewer outgoing circuits. The advantages of single-bus connection were simple, less equipment, low investment, convenient operation, and easy to expand. However, the disadvantage of single-bus connection is poor reliability and flexibility. Dual bus connection meant that each circuit could be converged to two busbars through a circuit breaker and two sets of isolating switches. The advantage of double bus connection was that the power supply method was more complicated and flexible, suitable for large-scale power distribution equipment. However, the disadvantage of double bus connection was that it required more equipment and investment. In general, single-bus connection is suitable for small power distribution stations, while double-bus connection is suitable for large-scale power distribution devices.
The difference between single bus section and double bus
The difference between single-bus sectioning and double-bus was in power supply reliability, dispatching flexibility, and investment cost. Single bus sectioning was to divide a single bus into two sections. Each section had an independent power supply. A power failure in one section would not affect the other section. It was economical and practical, but a power failure for maintenance would cause a power failure in the lower line. Double busbars meant that all outgoing lines could be hung on two sets of busbars. If any bus was cut off, it could be transferred to another bus to achieve continuous power supply, but the cost was higher. Dual bus connection has the advantages of reliable power supply, convenient maintenance, flexible dispatching or easy expansion, but there are many equipment, complicated power distribution devices, and poor economy.
double bus
Dual bus connection is the main connection method of power distribution system, which has some advantages and disadvantages. Its advantages included reliable power supply, flexible dispatching, and convenient expansion. The double bus connection could be switched and repaired through the operation of the isolating switch, so that the power supply would not be interrupted. In addition, the dual bus connection could also match the load and power supply appropriately to achieve an uninterrupted power supply for important users. However, there were some shortcomings in the dual-bus connection, such as complicated operation, increased investment, and complicated power distribution equipment. In order to solve these problems, bus sections and bypass bus systems could be used. In general, double-bus connection has a certain range of applications and advantages in the power system, but it also needs to weigh its advantages and disadvantages to choose the appropriate connection method.
single bus connection
Single-bus connection was a main electrical connection method, which was composed of a line, a transformer circuit, and a set of buses. Each power line and lead-out line was connected to the same set of buses through a circuit breaker and an isolating switch. The single-bus connection is simple, economical and convenient. It is suitable for the number of outgoing circuits of 6 - 10Kiloton power distribution devices not exceeding 5 circuits, 35 - 63Kiloton power distribution devices not exceeding 3 circuits, and 110 - 220Kiloton power distribution devices not exceeding 2 circuits. The advantages of single-bus connection were less equipment, less investment, convenient operation, and easy expansion. However, the reliability and flexibility of the single-bus connection are poor. When the bus or the bus isolation switch fails or is repaired, all the power supply of the bus must be disconnected. In order to improve the reliability and flexibility of power supply, the improved method of single-bus section connection or single-bus bypass connection can be adopted. The single-bus section connection can reduce the range of influence of bus faults and improve the reliability of power supply.
My First Adventure in a Double Decker Bus
Well, my first time on a double decker bus was really exciting. I climbed up to the top floor and got a great view of the city streets. It was like seeing everything from a new perspective.
The difference between a bus and a bus
The difference between the first and second bus sections was their functions and uses. The first section of the bus was the bus that was connected to the main transformer after the transmission side cable or cable head of the power station entered the transformer station. It was used to receive high-voltage electric energy from the power station. The second-stage bus was the bus before the intermediate voltage energy output from the main transformer entered the power transmission station. It was used to carry the power transmission in the power transmission station. The connection method of the first section bus and the second section bus was also different. The first section bus divided the bus into two sections, and each section bus was connected to several outgoing lines. The two sections of bus were connected by a bus breaker, which could realize rapid switching and load transfer. In contrast, the two-section bus could connect all the outgoing lines to either the first bus or the second bus. When any bus was cut off, all the outgoing lines could be transferred to the other bus to achieve continuous power supply. In general, there were differences in power transmission and power supply reliability between the first bus and the second bus.
What's the story behind Double Dutch Bus?
Double Dutch Bus is a song that originated in the 1980s. It's known for its catchy rhythm and fun lyrics, but the specific story behind it might vary depending on who you ask.
Campus bus, public bus, toys
The school bus toy was a children's toy that could simulate the appearance and sound and light effects of the school bus. These toys are usually suitable for children between the ages of 2 to 9 and come in different colors and styles. There were many brands and models of school bus toys on the market, including alloy and plastic models. Some school bus toys even came with electric traffic lights and mannequins. These toys were loved by children, and they could bring them fun and learning opportunities.
Campus bus, public bus, toys
There were many brands and styles to choose from. Among them were KIV, Baole Star, WENYI, TaTanice, and other brands. Most of these toy car models were made of alloy, and some could even open doors. Based on the number of reviews, the school bus toy on planet Baole was loved by many people. It had already received 200000 reviews. In addition, some other brands of school bus toys also received a certain amount of attention. Overall, the school bus toy had a certain degree of popularity in the market.
Campus bus, public bus, toys
The school bus toy was a children's toy with the theme of a school bus or bus. It was usually made of plastic, metal, or wood. It had a realistic appearance and details, and could simulate the real bus operation scene. This kind of toy usually included the body, wheels, seats, steering wheel, horns, etc. Some were also equipped with lights, sound effects, etc., to attract the children's attention and let them learn traffic rules and public safety knowledge while playing. The school bus toy is suitable for children over the age of 3 to play with. It can cultivate their imagination, creativity, and hand-eye coordination. It can also enhance their awareness and understanding of transportation. While waiting for the anime, you can also click on the link below to read the classic original work of " Full-time Expert "!
secondary bus
The secondary bus is an important part of the secondary system in the power station. It is used to reduce the primary voltage of the transformer station to the required secondary voltage through the ratio, which is used by various secondary equipment. At the same time, the secondary bus also isolated the secondary equipment from the primary high voltage to ensure the safety of people and equipment. In the secondary circuit of the transformer station, the bus voltage is transmitted to the protection device, the measurement and control device, the electric energy meter, the stability control device, the fault recorder, and the synchronous generator for monitoring, measurement, and control. The normal operation of the bus voltage is very important for the accurate action and refusal of the protection device. In the secondary system of the power station, the normal operation of the secondary circuit of the PT plays an important role. The fault of the secondary circuit of the PT will cause the malfunction or failure of the relay protection device. Therefore, in the operation and maintenance of the transformer station, the design and operation of the secondary connection and parallel circuit of the PT must strictly abide by the relevant regulations to ensure the normal operation of the secondary bus and the safety of the equipment.