Ponovo Power Co. Ltd

beijing, Vietnam

• MOQ 1 Set(s)

We offer svc (static var compensator) problem solving svc is a kind of electrical device applied for providing fast-acting reactive power compensation on high-voltage electricity transmission networks. Ponovo, svc manufacturer, is able to provide quality static var compensator, which can solve the problems in the following areas: 1. Electric arc furnace electric arc furnace may cause a series of adverse effects to the power grid, mainly including serious three-phase unbalance, high order harmonics, severe voltage distortion, serious voltage flicker, and low power factor. A method of choice to solve the above problems is to install a dynamic static reactive power compensation device (svc) with quick response speed. Static var compensator, with isolated phase compensation function, can eliminate the three-phase unbalance, the harmful high order harmonics, and improve power quality and power factor by providing capacitive reactive power to the system. 2. Rolling mill the reactive power impulse caused by rolling mill and other industrial symmetry loads will bring power grid such problems as: severe voltage level drop, voltage fluctuation, power factor reduction, harmful high order harmonics etc. Ponovo’s svc can perfectly solve the above problems. This power compensation equipment can maintain a stable bus voltage, eliminate the harmonics, and improve power factor. 3. Power supply of electric locomotive when the transportation way of electric locomotive preserves the environment, it may seriously pollute the power grid. As the electric locomotive has single phase power supply, which may cause serious three-phase unbalance, low power factor, and negative sequence current. however, there is a preferred way to solve the above problems, that is, to install svc at appropriate locations along the railway. Quick isolated phase compensation function of this electrical equipment can ensure the three-phase balance, and the improved power factor is achieved through filters. 4. Hoist hoist and other heavy loads may have the following effects on power grids at work: voltage level drop and voltage fluctuation, low power factor and harmful high order harmonics. With ponovo’s static var compensator, there is no need to worry about these problems. 5. Long-distance power transmission in electrical engineering, long-distance power transmission is a growing trend. It demands the transmission and distribution system to be more effective. Ponovo’s svc can significantly improve the transmission and distribution performance of power system, such as transmission loss reduction, reduced power fluctuation, increased transmission capacity and transient stability limit etc. 6. Secondary substation in city (66/110 kv) in regional power grid, we generally use the tsc for reactive power compensation and improved power factor. But it can not achieve rapid and precise regulation with the changes of load which is easy to cause inverted injection of reactive power to the system. Therefore, ponovo’s svc is needed to quickly and accurately make capacitive and inductive reactive power compensation.

• MOQ 1 Set(s)

We offer active power filter - apf. 1- product introduction -due to non linear load have widely application in recent years, such as arc furnace, electrified railway, frequency convertor, rectifier, ups and computer. It brings serious negative influence to quality of power supply because of their non-linear, impact and unbalanced characteristics. In another aspect, the electrical and electronic devices are more sensitive to the power quality for modern factory and commercial industry, as well as common households. Our quality of power supply is facing more challenge. - conventional passive filters are mainly applied for harmonic restrain and reactive power compensation due to its advantages of less cost, simple structure, guaranteed stability and easy for maintenance. But passive filters have large dimension, their performance is affected by system and it is possible for passive filters to have resonance with system. After all, it is not enough to manage harmonic only by using passive filters. We must use new technology—active power filter for integrate power quality management in power distribution system. 2- apf functions - provides integrated solution for power quality management - reduce harmonic distortion - reduce current peak value - improve power factor - reduce power loss in distribution line - prevent natural line from overheat - prevent signal transmission equipment from data loss and interference - prevent sensitive devices from damage - prevent circuit breaker malfunction - prevent capacitors from damage due to overload

• MOQ 1 Set(s)

We are manufacture and design statcom system. 1 - equipment introduction statcom (static synchronous compensator, also known as svg). It is an important device for flexible ac transmission system (facts), which is the third generation of dynamic var compensation device after fc, mcr, and tcr type of svc (static var compensator). Its appearance represents the application of most advanced technology for dynamic var compensation. It is also known as dstatcom when apply in power distribution. Statcom is connected parallel in power grid and works as reactive current source. Its reactive current can be flexibly controlled and compensate reactive power for system automatically. It solves problem of harmonics interfere switching parallel capacitor banks. In another hand, it can restrain harmonics and improve power quality according to customers’ needs. Statcom has superior performance in lots of aspect such as responding speed, stabilize voltage of power grid, reduce system power loss and harmonics, increase both transmission capacity and limit for transient voltage. It also has advantage of smaller in dimension. statcom uses three phases powerful voltage sourced converter as its core. Its voltage output connects system by through reactor or transformer. And regulates ac voltage amplitude and phase of inverter to absorb or produce reactive power for system. As sourced compensation device, statcom not only monitoring and compensates current for impact load but also compensate and monitoring harmonic current. depending on advantages of powerful technology and human resource, beijing ponovo introduces several types of statcom with different topology to meet customers’ various needs. Accuvar asvc – 100 type of dstatcom applies chained-multilevel structure and featured with compact design, less power loss, fast respond and module configuration for easier expansion and maintenance. Major control system adopts dsp and fpga with layered structure which enables high-speed adaptive computation, multi-chained expansion and flexible configuration for system. It has been applied in industry of coal mine, wind power system, metallurgy, electrified railway and power distribution for urban and rural area (suitable for power distribution system with 3kv to 35kv). 2- main function 1. fast reactive power adjustment accuvar asvc provides continuous dynamic compensation to power factor along the load variation. It completely eradicates capacitive reactive power delivery to the power grid and maintain power factor in designed value for power grid. Accuvar asvc has advantages: (1) fast response, able to implement dynamic compensation in real time. (2) effectively avoid parallel resonance. (3) able to produce and absorb reactive power. (4) deliver less harmonic to system. 2. restrain voltage fluctuation and flicker power grid voltage has fluctuation and flicker when high power impact load is operating. Voltage fluctuation and flicker bring negative influence to other nearby customers’ electricity usage and sensitive load by decreasing safety for electricity usage and decreasing efficiency for production, increasing risk of faulty production. Accuvar asvc’s response time is less than 1ms and it provides smooth dynamic compensation for reactive power. It is more efficient to restrain voltage flicker and reduce voltage fluctuation, improve voltage to meet standard. 3. constant current, effectively restrain voltage drop accuvar asvc has characteristic of constant current. It has advantage in voltage control due to its reactive current output is not affected by busbar voltage. System needs more dynamic reactive power when system voltage gets lower. Accuvar asvc’s reactive current output is not related to system voltage, but the conventional capacitor var compensator’s reactive power output is inversely proportional to square value of voltage. Accuvar asvc can provide better support for improving low voltage ride through (lvrt) characteristic in wind power. 4. compensate negative sequence, implement balanced power supply accuvar asvc has unique chained structure to allow split-phase adjustment and realizes energy interchange between different phases. It provides balanced compensation to load negative sequence by applying steinmetz balanced principle. Accuvar asvc makes current flow into system with balanced power and desired reactive power. 5. resistance to harmonics, able to compensate the part of harmonic current due to widely applications of nonlinear load, harmonics threat public power grid worse than before. Harmonics cause equipment overheat, insulation depletion, extra power loss, decrease efficiency of power system and electrical equipment. It also cause malfunction of protection relay and malfunction of automatic device, inaccuracy of measurement and interfere nearby communication system. It is possible to have fire hazard when 3rd harmonic flow through natural line and makes line overheat. Accuvar asvc applies carrier phase shift multi-level pwm（pulse width modulation）control strategy and its high frequency equivalent switch can filtering partial load harmonics without amplifying them and no harmonic resonance. It makes possible for multi-function in on equipment.