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  • Statcom For 6kv 10kv 22kv 27 5kv 35kv - China

    price: contact company for price

    Improve the stability of power transmission

    Restrain voltage fluctuation and flicker

    Eliminate harmonics

    Improve power factor

    Wanlida Static Synchronous Compensator

    Main Functions

    In long distance transmission system, Static synchronous

    compensator (STATCOM) can not only compensate the power line

    losses caused byreactive power, increase line voltage and

    improve effective transmission capacity under normal

    operation, but also offer reactive power adjustment in time,

    damp system oscillation and improve system stability incase

    of fault.

    Maintain the receiving-end voltage level

    Since high capacity load centers lack reactive power

    support, it is easy to cause grid voltage dip, evencause

    voltage collapse. However, Static synchronous compensator

    (STATCOM) is capable of fast var adjustment. Therefore, the

    receiving-endvoltage level is greatly stabilized.

    Reactive power compensation leading to high power factor and

    low line losses

    Many types of loads need a mass of reactive power when

    operation, such as asynchronous motors, arcfurnaces, rolling

    mills and high rating rectifiers. At the same time, the

    upstream transformer and lineimpedance also generate

    reactive power, which still leading to low power factor.

    For the power system, loads with lower power factor will

    increase the line losses, voltage drop anddeterioratevoltage

    quality. Additionally, reactive power will reduce efficiency

    of power generation, transmission and distribution. For

    clients, low power factor will increase production costs.

    Restrain voltage fluctuation and flicker.

    Voltage fluctuation and flicker are mainly caused by rapid

    loads variation. This rapid variation also causesthe load

    current fluctuation dramatically. The current variation

    leads to system voltage losses changingvery fast, which

    brings the receiving-end grid voltage flicker. The typical

    loads that cause voltage flicker arearc furnaces, rolling

    mills, electric locomotives, etc.

    Static synchronous compensator (STATCOM/SVG) can offer fast

    reactive power regulation, which mitigate voltage

    fluctuation and flicker easily caused byloads variation.

    Now, Static synchronous compensator (STATCOM/SVG) is the

    best solution to restrain voltage fluctuation and flicker

    compared with MCR, TCR etc.

    Mitigate 3-phase unbalance.

    In distribution network, there are a lot of 3-phase

    unbalance loads, typically like electric locomotives and

    arcfurnaces. At the same time, line and transformer

    impedance unbalances can also cause voltage

    unbalanceproblem. Static synchronous compensator (STATCOM)

    can fast compensate negative sequence current caused by

    unbalance loads, which ensurebalanced 3-phase grid current.

    Thus, it improves the power supply quality greatly.

    Eliminate harmonics including Even-order, Odd-order,

    subharmonic and inter-harmonics(Option)

    Static synchronous compensator (STATCOM/SVG) has very good

    harmonic suppression functions including even-order

    harmonic, odd-order harmonic, subharmonic and inter-

    harmonics, it adopted Instantaneous power theory to detect

    and calculate harmonic current automatically and then

    control PWM converter, and input compensated current into

    power grid which is of the right magnitude with harmonic

    current, but with inverse polarity.

    Structure of Wanlida Static Synchronous Compensator

    It mainly consists of reactor, start-up cabinet, cascade

    multilevel inverters cabinet and control cabinet.

    Technical Advantages

    Static Synchronous Compensator has the following advantages

    compared with traditional compensation methods:

    Faster response speed

    STATCOM response time: ≤5ms

    Traditional static compensator response time: ≥10ms.

    STATCOM can finish the conversion from rated capacitance var

    to rated inductance var in a very short time. This

    unexampled response speed makes STATCOM very suitable for

    impact load compensation.

    Stronger voltage flicker restrain capability

    SVC can restrain voltage flicker to 2:1 in maximum, but

    STATCOM 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 STATCOM responds

    fast. When its

    capacity is increased, the capability of voltage flicker

    mitigation can be further improved.

    Wide operation range

    STATCOM can work from rated inductive power to rated

    capacitive power. So compared with SVC, STATCOM operation

    range is much wider. Furthermore, STATCOM can output rated

    reactive current even under low system voltage.

    Multiple compensation function

    STATCOM is not only functioned as fast reactive power

    compensator, but also harmonics and unbalance compensator


    to different demands of different clients.

    Low harmonic content

    STATCOM utilizes PWM, 3-level and multiple technologies.

    Therefore, it generates very low harmonics with compensating


    harmonics at the same time. Thus, STATCOM becomes a true

    multifunctional compensator.

    Small volume

    HV big capacitors and reactors are not necessary. STATCOM

    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


    Technical Features

    Provides fast smooth dynamic compensation from inductive to

    capacitive in reactive power, also eradicates reactive power

    delivery to power grid, it can meet the maximum request to

    compensate power factor and keep power factor close to 1.0


    Low power loss, more better economical operation.

    Has powerful capability to support voltage and ability to

    continuously operate under the 1.1 times of overload.

    More fast response time and better effect for restraining


    Produce no harmonic and and compensate nearly all load

    harmonics without amplifying them and without generating

    harmonic resonance, it has more safety, stability and

    reliability because it is not sensitive to the system power


    Modular design. All power units are the same in structure

    and electric performance, thus they are interchangeable,

    which is easy for installation and maintenance. Redundant

    N+1 structure provides more higher reliability.

    Less space for installation.

    Company Contact:

    • Phone: 867563395623

    • Address: Wanlida Relay Protection Industrial Park, No. 1 Te, Zhuhai, China

    • Email: Email

    Published date: August 23, 2013 -

    • Business Description: Incorporated in 1991, Zhuhai Wanlida Electric Co., Ltd. (www.zhwld.com)

      ('the Company'), is located in Relay Protection Industrial Park, No.1

      Technology Road, Science and Technology Innovation Coast, High tech

      Zone, Zhuhai City, coving a land area of approximately 60 thousand

      square meters (including Park 1 and Park2). The Company was listed for

      equity financing on November 13, 2007 (equity securities abbreviated as:

      Wanlida stock certificates, code: 002180), with a registered capital of

      124,980,000 Yuan. 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, Macau 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.

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