As an important part of the development of Safe City, Ping An Campus is undergoing vigorous development. In recent years, campus safety issues have become increasingly prominent. Campus violence, student abuse, campus fires, thefts and other cases have occurred from time to time. The Ministry and the Ministry of Education have all called for strengthening the school's safety precautions and establishing a school safety prevention and control system. Teacher and student safety.
At present, there are many systems built on campus, including security, firefighting, transportation, etc. However, due to the difference in construction time, the systems are independent of each other; this makes the information of all systems scattered, and the degree of integration between systems is relatively small. Low, lack of unified management; eventually lead to the use of the user, the security incidents that occur on the campus, often can only be used independently for each system process, can not follow the entire process of tracking management, can not fundamentally ensure the safety of teachers and students.
First, the design of this program is based on the idea <br> <br> video surveillance system at the core, using a variety of technological resources, integrate all kinds of campus security system, set for all-round monitoring of the formation of various events on campus, warning , decision-making and scheduling provide a strong support for the campus's safety and prevention work and a comprehensive and effective supervision and control system for campus safety. The system has a high degree of intelligence and comprehensive prevention capabilities. It has the features of intelligent early warning, linkage processing in the event, and efficient viewing afterwards.
The design idea of ​​the system is to create a smart and safe campus through the cooperation of multiple links such as monitoring, verification, solution, and optimization of the smart security loop. Through comprehensive inspection, accurate verification, rapid resolution and continuous optimization, the system forms a more complete monitoring network and truly implements our smart security ring.
Design ideas
Firstly, through the combination of active monitoring such as video surveillance, alarm, perimeter system passive monitoring and manual patrol, etc., a comprehensive campus environment monitoring network is formed; when an alarm occurs, rapid positioning using GIS and accurate verification of live video are fast. Identify true alarms and false alarms to reduce the work burden caused by false alarms. For the real alarm situations, quickly find the nearby patrol force through the emergency command, and arrive at the location of the incident to quickly dispose of the problems on the spot; at the same time, pass the incident leads. Time series and key information such as geographic information are connected in series, relevant information of the case is correlated and analyzed, and key information is used as the main axis to realize the spatial and temporal presentation of the entire event. Statistical analysis of historical data was performed afterwards, and our system was continuously improved during the use of users. Through statistical analysis, the system predicts possible events in the future, formulates more effective plans, improves campus deployment, enhances the ability to prevent, control, and dispose of various types of emergencies, plays a role in preventing campus security time, and truly guarantees campus safety. .
Second, the logic architecture <br> <br> safe campus solutions to the overall design of the logical framework consists of the access layer, management, application layer three-tier structure, the access layer is responsible for the video, patrol, alarm systems to achieve each access System integration. The middle management layer realizes the unified management of the access layer through integration and service integration of the underlying information and through the operation and maintenance system, and provides unified interface support for the upper layer applications. At the application layer, we use business processes as the core and business applications as the entry point to engage in the first major security activities and campus patrols, alarm linkage and emergency command in the event, and after-hours space-time analysis and support decision-making. The design of the user's perspective completely breaks the limitations of the underlying system.
Logical architecture diagram
Take the accidental escape case on campus as an example. After an accident occurs, the on-site personnel dials an alarm call or presses an alarm bell. The alarm center is linked to receive alarm information. After receiving the alarm information, the police officers used the campus GIS to quickly locate the alarm site and linked the video surveillance system to collect the live video data to verify whether the alarm situation was true. If the alarm information is true, the campus patrol system will be linked to confirm the patrol personnel's patrol route and site conditions, and quickly mobilize the nearest patrol personnel to reach the location of the incident to maintain the site order. Campus patrol officers arrived at the scene and found that the students were injured and reported to the command center. The command center linked the campus 120 to treat the wounded. At the same time, the campus intelligent traffic system was linked to find out the vehicles involved in the accident and the information of the perpetrators was used to lock in the criminal suspects and carry out campus control.
Through the linkage of various campus security systems, the system ties incident cues through key information such as time points and geographical information, correlates and analyzes case-related information, and uses key information as the major axis to realize the spatio-temporal presentation of the whole process of the incident and confirm the suspects accordingly. And may flee the route, at the same time send relevant video to each monitoring point. If the suspect is still on campus, it can control the campus bayonet and the traffic system. Once the suspect is found, the suspect will be detained. Afterwards, by summing up the circumstances of the incident and its internal causes, combined with other cases of campus accidents, we identified the optimal treatment plan for such cases. The next time a similar case occurs, accurate decisions can be made in a timely manner.
Third, the design features (a) system integration Through the system integration, the existing video surveillance, patrol system, GIS systems, alarm systems, access control systems and other systems to achieve the full sharing of resources to achieve a centralized, efficient, Convenient management. In the previous case, we integrated video surveillance, GIS systems, access control systems, alarm systems, intelligent transportation systems, campus patrol systems, campus 120 systems, etc., to achieve rapid processing of incidents;
(II) Unified Management After system integration, we have provided unified management. The first is unified management of information. The unified acquisition and distribution of video, fire protection, and alarm information can allow users to easily obtain real-time complete information.
At the same time, our integrated services can achieve unified storage of heterogeneous data, fast retrieval and positioning. For example, after knowing the license plate, we can retrieve the access information of the car, all the videos and pictures of the car, and The car's driving path on the campus.
In advanced systems, if there is no good operation and maintenance system to ensure the normal operation of the entire system, then this system is also difficult to play its due capabilities. The program provides comprehensive and complete operation and maintenance capabilities, monitoring video quality, equipment status, equipment and service parameters, and providing early warning of abnormal system conditions. Early detection of hidden troubles and performance bottlenecks to ensure reliable, efficient, continuous, and safe operation of the system.
(3) Full-flow business application Finally, we must emphasize that the business application is the real core of the system, the first intelligent early warning and tracking, the system linkage and real-time wisdom in the event, the statistical analysis and auxiliary decision-making afterwards, and the entire process. Any part of the system needs the support and protection of the system, so as to truly create a smart, safe campus.
IV Summary <br> <br> campus in demand peace building boom driven by the spread of the policy, to create a safe and harmonious campus is not only a need for the development of quality education, it is today building a harmonious society of the times. By combining the security status of universities at home and abroad, adopting advanced design concepts and customizing the development of campus applications, it can make up for the insufficiency of traditional monitoring and create a safe campus and a smart campus for schools, teachers, and students.
Characteristic and performance analysis of main parts of generator
Stator:
Stator consists of base, stator core and stator windings.
The base is welded by steel plate, the structure is light and sturdy, and the base is divided into many air inlet and outlet zones in the axial direction;
Stator coil:
It is stacked by strands of copper wire covered by polyester glass fiber, with half-unit type and basket shaped structure (parts of stator coils use transposition structure). The insulation grade of the stator coil is F grade. The stator coil is shaped by continuous wrapping and mould pressing with mica tapes. The coil end is firmly tied up to the support and the bundling ring with unidirectional tapes or dacron-glass ropes thus the turbo-generator unit became highly resistant towards sudden short-circuit conditions.
Stator core:
Stator core is punched and stacked by cold rolled non-oriented, high permeability, low loss high-quality silicon steel sheet, both sides of the silicon steel sheet are coated with a solid insulating film to prevent short-circuit between the stator core pieces to reduce eddy current loss.
Rotor:
The rotor is composed of shaft, coil, center ring, shroud ring and fan ring etc. The rotor coil is made of cold-drawn flat copper wires, and processed by oxygen-free annealing. The rotor coil of generator with 50MW and above is welded together by silver-bearing cold-drawn copper wires and adopts F grade insulation.
The shroud ring at rotor coil end is made of non-magnetic steel. Both ends of the rotor are equipped with centrifugal fan or axial flow fan with paddle fan blade which is forged by high-strength aluminum alloy.
Rotor machining:
The generator shaft is forged from an integral high-quality alloy steel and has an axial groove formed thereon for fitting a rotor coil and an air groove or a crescent groove is made in the large tooth to enhance the cooling of the main body and the coil end. The slots are processed by special machine for generator rotor processing, Tacchi high precision horizontal slotting and milling machine made in Italy, to ensure the high efficiency of generator.
The generator rotor must be subjected to high-speed dynamic balancing experiment and dynamic impedance experiment before delivery to verify the mechanical strength of the rotor and ensure excellent inter-turn insulation of the rotor windings.
(2)Model
Mainly produce the following model Steam Turbine Generator and the specifications are as follows:
Voltage(KV) Frequency(HZ) Power(MW)
2 poles Steam Turbine generator 6.3-3.8 50 3-60
6.6-13.8 60
4 poles steam turbine generator 0.4/0.69 6.3/6.6 10.5/11 50 0.5-30
0.4-11 60
QNP steam turbine generator uses closed-loop air self-circulation ventilation.
The rotors of turbo-generator under 50MW adopt indirect ventilation cooling method;
The rotors of 50MW and above turbo-generator is directly ventilated and cooled; an auxiliary groove is machined under the rotor winding trunking; air vents are machined on the rotor windings; with the action of the fan head and the centrifugal pressure head of the air vents, the rotor windings are directly cooled by air from the auxiliary groove and air vents.
(4)Excitation mode
QNP's steam turbine generator can adopt static silicon controlled type, two-pole AC brushless excitation and three-pole AC brushless excitation, three kinds of excitation mode.
(5)Insulation system
Adopt class F insulation materials and insulation structure, during the running time, assess the system according to class B insulation grade, meanwhile some margin has been kept.
(6)Design and acceptance criteria
Design, manufacture, inspection are carried out according to the relevant national standards, at the same time can meet the International Electrotechnical Commission IEC34-1 latest standards. According to customer`s requirements, QNP`s steam turbine generator can also be designed, manufactured and accepted according to ANSI, NEMA and other international standards.
(7)Technical Performance Analysis
1.Output margin
The series of steam turbine generator of QNP keeps 10% output margin.
2.Loss and efficiency
The steam turbine generator of QNP optimized the design and farthest minimized the additional loss and wind abrasion of generator under no-load and short-circuit condition, improved the efficiency of the generator, in general, QNP steam turbine generator`s efficiency is 0.2% higher than domestic similar models in this industry. It is higher than the national efficiency standard on the same capacity level. For example: QNP 15MW steam turbine generator`s efficiency value can reach 97.65%, and the national standard value is 97%.
3.Running reliability
QNP's steam turbine generator adopts advanced manufacturing technology, especially the rotor`s overspeed test uses high-speed dynamic balancer, rotor`s balance precision has been greatly improved, and the rotor`s vibration value is decreased. So that the steam turbine generator`s running availability factor has been improved, and the unit`s forced outage rate is decreased. At present, the availability factor of the steam turbine generator can reach about 99%, and the forced outage rate fell to 0.04% to 0.4%. Overhaul interval is up to 5 years. And the unit life can reach to 35 to 40 years.
Model meaning
QFWD-3-2A
QF Steam turbine generator
W W means brushless, without W means static silicon controlled
D D means double support, without B means single support
3 Rated power
2 2 means two poles and means the rated rotation speed is 3000 r/min
4 means four poles and means the rated rotation speed is 1500 r/min
A means the design serial number: A.B.C.D
Steam Turbine Generator,Biomass Generating,Biomass Generation,Biomass Power Generation
Shandong Qingneng Power Co., Ltd. , https://www.steamturbine.be