Static Var Generator For Electric Arc Furnace:
1. stabilizing weak systems,
2. minimizing line loss,
3. increasing power transfer capability,
4. providing greater dynamic voltage control.
Min.Order Quantity: |
1 Set |
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Supply Ability: |
500 Sets per Year |
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Port: |
Zhuhai/Shenzhen/HongKong/Macau |
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Payment Terms: |
L/C,T/T |
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Packaging Details: |
Wooden case (Fumigation) |
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Delivery Detail: |
60days |
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Static Var Generator For Electric Arc Furnace
SVG Principle
SVG is the representative of newest technology in var compensation area.SVG is connected in parallel to the grid, similar to a variable var current source.Its var current can change following the vary of load var current rapidly and automatically.Since the response speed of SVG is very fast, it is also called Static Synchronous Compensator, STATCOM for short.
SVG's fundamental configuration is 2-phase or 3-phase self commutated bridge circuits adopting full controlled power electronic semiconductor devices (like IGBT and IGCT).Through reactors the SVG is connected in parallel to the grid.By adjusting the output voltage amplitude and phase angle or direct controlling AC side current, the SVG can absorb or generate var according to the load reactive power or the grid voltage level.
SVG is provided with an overwhelming advantage when it is used for voltage control.The lower the system voltage is, the more dynamicreactive support is needed to support voltage.The reactive current output by SVG has nothing to do with the system voltage and may be considered as a controllable constant current source.While, the lower the system voltage is, the lower capacity TCR/MCR-type SVC may have to output reactive current.
Technical Advantages of Wanlida SVG
SVG is the most advanced var compensator technologically, which realizes an evolution of reactive power compensation mode basedon voltage source converter.Big volume capacitors and reactors are no longer needed.SVG uses HV IGBT or IGCT with high switching frequency to realize reactive power regulation.Therefore, SVG has the following advantages compared with traditional compensation methods:
Faster response speed
SVG response time:≤5ms
Traditional static compensator response time:≥10ms.
SVG can finish the conversion from rated capacitance var to rated inductance var in a very short time. This unexampled response speed makes SVG very suitable for impact load compensation.
Stronger voltage flicker restrain capability
SVC can restrain voltage flicker to 2:1 in maximum, but SVG can achieve 5:1, even higher.SVC cannot improve its capability for voltage flicker mitigation even with high capacity because of low response speed.But SVG responds fast.When its capacity is increased, the capability of voltage flicker mitigation can be further improved.
Wide operation range
SVG can work from rated inductive power to rated capacitive power.So compared with SVC, SVG operation range is much wider. Furthermore, SVG can output rated reactive current even under low system voltage.
Multiple compensation function
SVG is not only functioned as fast reactive power compensator, but also harmonics and unbalance compensator according to different demands of different clients.
Low harmonic content
SVG utilizes PWM, 3-level and multiple technologies.Therefore, it generates very low harmonics with compensating load harmonics at the same time.Thus, SVG becomes a true multifunctional compensator.
Small volume
HV big capacitors and reactors are not necessary.SVG installation area is greatly smaller than that of the same capacity SVC, only 50% or even lower.
At the same time, Wanlida cooperates with the No.1 Science university in China---Tsinghua University to develop SVG, but the most important advantage for Wanlida is that we have many years experiences for Medium voltage variable frequency drives technology, because the Static Var Generator has almost structure and technology with Medium voltage variable frequency drives, in addition, Wanlida has over 21 years experiences for protection relays for reactor, capacitor etc.
The Structure of Wanlida SVG
Incorporated in 1991, with a registered capital of 120, 000, 000 RMB, Zhuhai Wanlida Electrical Automation Co., Ltd. (www.elecequipment.com) ('the Company'), is located in Relay Protection Industrial Park, No. 1 Technology Road, Science and Technology Innovation Coast, High-tech Zone, Zhuhai City, covering a land area of approximately 60 thousand square meters (including Park 1 and Park2). The Company keeps on her aggressive 'production, study, research and application' co-operation with the famous academies such as Tsinghua University, Chinese Academy of Sciences and Central China University of Science and Technology and carries out relevant technology innovation. It is a national high-tech enterprise that deals with specialized development, production and sales of substation integrated automation systems and Medium voltage variable frequency drives, Medium voltage magnetically controlled soft starters, Static synchronous compensator(STATCOM/SVG), Static VAR compensator(SVC), Active power filter(APF/AHF), Thyristor switched capacitor bank (TSC/TSF), High voltage direct-current light transmission systems etc power electronic equipments. In addition, the Company is known as a famous manufacturer and backbone enterprise of transformer-substation integrated automation and power electronic equipments fields in China, and it also acts as fresh blood in the field of energy conservation and emission reduction.
Wanlida passed the ISO9001 quality system certification, ISO14001 Environment Management System Certification and OHSMS18001 Occupation Health &Safety Management System Certification; All products passed the test of sated authoritative inspection bureau. And it had been rated as 'National High and New Technology Enterprise', 'Enterprise Recommended by State Economic and Trade Commission for Reconstruction of Urban and Rural Electric Grids', 'Key Software Enterprise Covered by National Program', 'Excellent enterprise of China', 'First-choice Manufacturer for Electric Framework Protocol Sponsored by CNPC', 'Excellent Enterprise of Guangdong Province', 'Optimum Good-faith Enterprise of Guangdong Province', 'Contract-honoring Enterprise of Guangdong Province', 'Top 10 Private Enterprises of Zhuhai City', and 'Enterprise with Grade-AAA Bank Credit '.
Wanlida has a very strong R&D teamwork which has a population of over 100 with doctor's degree, postgraduate degree and bachelor's degree etc, and all of the products are designed strictly according to IEC standards; Wanlida has modern standard workshops, it brought advanced SMT production lines and wave soldering machines into company from abroad, and built the first-class high voltage and big capacity power electronic equipments assembling and test platform, which is able to realize full-load test and ensure that all of products have exquisite technics and reliable quality; At present, Wanlida covers all of domestic areas except Hongkong and Taiwan, and it also sells the products to Southeast Asia, Middle East, South America, Africa etc over 20 countries.
The Company aims to grow into the most dedicated electric automation enterprise in the world, and commits itself to building the aircraft carrier of power electronic energy efficiency products.
