What is the trend of Shante UPS power supply development?
Shante UPS power supply system, as a high-tech product developed to meet the demand of power market, has obvious power protection functions: when the power is cut off, it continuously supplies power to the load; when the power is unstable, it can avoid the harm of under-voltage and surge impact on the load, and comprehensively improve the quality of power supply; When the power supply system (including UPS) fails, it can protect the load (especially the computer and network system) in an all-round way, and protect the overload, short circuit and battery overload, providing a stable working environment for the load.
With the IT system gradually moving towards centralized management, the application of UPS power protection system in enterprises will be more in-depth. The application of UPS will change from single machine to redundant structure, from dependability to availability, from power supply system to IT operation environment. With the development of information technology, electronic technology and control technology, various advanced technologies have been widely used in the design, development and production process of UPS. The technology of UPS will have the following six development trends.
By analyzing and synthesizing all kinds of information, the intelligent system not only completes the control function of the corresponding part of UPS in normal operation, but also completes the real-time monitoring of UPS in operation, analyses and processes the important data information in the circuit, and obtains the functions of whether each part of the circuit works normally or not; when UPS breaks down, the energy roots should be realized. According to the test results, timely analysis, diagnosis of the fault location, and give treatment methods; timely take the necessary self-emergency protection and control actions according to the needs of the site, in order to prevent the expansion of the impact area of the fault; complete the necessary self-maintenance, with the function of exchanging information, you can input information from the computer or get information from the network at any time. Interest.
UPS uses the latest digital signal controller (DSP) to digitize the Hull sensor, and achieves 100% digital operation of UPS system. Multiprocessor redundancy system is also used to control rectifiers, inverters and internal static bypass with multiple microprocessors with independent power supply, which improves the digitalization and reliability of the system.
3, high frequency
The first generation of UPS is controlled silicon, the second generation is high power transistor or field effect transistor, and the third generation is IGBT (insulated gate bipolar transistor). The switching speed of high power transistors or FETs is one order of magnitude higher than that of SCR, and the current capacity and speed of IGBT power devices are much larger and faster than that of high power transistors or FETs, which makes the working frequency of power conversion circuits up to 50 kHz. With the increase of the frequency of the converter circuit, the inductance, capacitance, noise and volume used for filtering are greatly reduced, and the UPS efficiency, dynamic response characteristics and control accuracy are greatly improved
4. Redundant Parallel Machine Technology
By developing new application technology, multi-module redundancy and parallel operation in UPS can be realized without additional central control unit, load sharing. When a module is in trouble, load automatically transfers, maintenance can be hot plug-in and pull-out, which greatly improves the power supply reliability of a single UPS. Additionally, the system composed of several UPS runs redundantly. If a single UPS machine fails, it will be shut down immediately. Other UPS systems will automatically bear all the load, and will not have any impact on the load.
With the development of information technology, the application fields of power supply protection are expanding and the requirements are constantly improving. To meet these requirements, UPS is difficult to be alone. It is necessary to control the links involved in the whole power system. UPS has developed from the pure backup power supply technology of initial equipment protection and system protection to today's information protection and wisdom. The integrated application of management and whole computer room has been extended to power generation, distribution, transformation, uninterruptible power supply, computer room, power equipment, power cable, data wiring, environmental monitoring and system management. It is not the original UPS. UPS equipment is only the core component of the system.
From the point of view of UPS power supply technology, on the basis of continuous optimization of power output characteristics, the study of power input characteristics makes electromagnetic compatibility and low harmonic pollution become important indicators. Harmonic processing technology and electromagnetic compatibility design can improve the load characteristics of power supply to power grid, reduce the * of other equipment, and improve the power source. As a result, the concept of green power has begun to attract people's attention. With the development of electronic technology and computer technology, in addition to greatly improving the power performance of UPS, its network management can realize remote monitoring. Digital power control technology enables products to have customized functions. Intelligent design makes them highly intelligent monitorable, controllable and adaptive equipment.
From the perspective of information construction, UPS has developed from focusing on electrical performance indicators, reliability and quality to unified standards and specifications, adopting modularization and parallel redundancy technology, systematically considering various supply, power equipment and links as well as system TCO, so as to improve the reliability, availability and manageability of the whole system involved in UPS power consumption. Rationality, maintainability and scalability. Integrated application provides a complete and effective power application solution for users. This expansion direction adapts to the needs of information construction. However, for UPS manufacturers, especially domestic manufacturers, there is still much work to be done to meet the change of this demand.
Harmonic currents generated by various electrical equipment and power supply devices seriously pollute the power grid. With the promulgation of various policies and regulations, the voice of pollution-free green power supply devices is increasing. In addition to installing high-efficiency input filters, UPS should also adopt power factor correction technology at the input end of power grid, which can not only eliminate the harmonic current generated by rectifier filter circuit itself, but also compensate the input power factor. By using IGBT technology, the input power factor of the rectifier can be increased to close to 1, and the pollution to the power grid has been reduced to the level of approximate resistance load.