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INTRODUCTION

(STATic  Synchronous  COMpensator), also known as SVG (Static Var Generator)  

 
Sinopak STATCOM is a chain-type static synchronous compensator (STATCOM/DSTATCOM, also knows as SVG)  One STATCOM enables grid code compliance from HV Incoming Busbar directly.

 

SVG, different from impedance compensation (injecting or absorbing reactive power by capacitor and reactor) theory of traditional SVC, is based on voltage source converter, whose theory is equivalent to static synchronous condenser but whose performance is better than that of condenser and SVC. Especially, its operation range is wide, and its reactive compensation under low voltage(LVRT) is far greater than that of SVC.

OPERATION PRINCIPLE

The Static Synchronous Compensator is a voltage regulating device based on voltage source converters (IGBTs). It acts as a source or a sink of reactive power which is independent of ac system voltage. STATCOM can operate as a part of Flexible AC Transmission    System (FACTS) to detect and compensate voltage fluctuations or flickers instantly, correct unbalanced loads and control power factor. 

Operation Waveform Phasor Diagram Remark
No-load         Ics=0.ifVs=Vc
Capacitive       If Vc > Vs , lcs is leading current . the current amplitude can be continuously controlled by adjusting Vc, STATCOM works as a capacitor whose capacitance can be continuously conreolled.
Inductive output
             If Vc < Vs, Ics is lagging current. At this point, STATCOM oprates as a reactor whose inductance can be continuously controlled.

Sinopak STATCOM Topology H-Bridge Cascading Scheme

The cascading scheme is a multi-level topology that consists of many H-bridge power units with monopole multiplier modulation to achieve three-level output on AC side. Each phase adopts the carrier phase modulation method to obtain better voltage output waveform with much more level numbers. The cascading scheme can output phase voltage

with 2N +1 levels if each phase comprises N +1 chain (i.e. the H-bridge power unit).

This topology can be used in two connection schemes: Delta connection and Star connection:

Star connection

Delta connection

TECHNICAL SPECIFICATIONS

   Basic Parameters

   Rated voltage

 

   Rated current

 

   Input voltage range

  0.9~1.1Pu

   Grid frequency

  50±2Hz

   Var range

  -Mvar(Inductive)~+Mvar( Capacitive )continuous

   Wiring method

  Y-connection

   Power loss

  ≤1%

   THD

  ≤3%

   Auxiliary power supply

  3P+N+PE 400Vac & 220VDC

   Cooling method

  Water cooling/ Air cooling

   Insulation grade

  IP54

   Noise

  ≤65dB

   Control and Protection

   Reactive power response time

    <5ms

   Voltage control time

  <30ms

   Operation mode

  Reactive power control

  Voltage control

  Power factor control

  Load compensation

   Overload ability

   1.1times continues operation,give alarm after 3 minutes;

   1.2times trip after 1 minute;

   1.3times trip instantaneously

   Protection

  Over voltage and under voltage Protection

  Over Current Protection

  Short circuit Protection

  Over or under frequency Protection

  Driver Faults Protection

  Over temperature Protection

  Communication fault Protection

   Communication

   Communication interface

  RS485, Ethernet

   Protocol

  MODBUS RTU, IEC-103, IEC-104, IEC61850

   Monitor mode

  Local/Romote

   HMI

  LCD

   Signal transmission

  Optic-fiber

   Environment

   Operation temperature

  -25℃~+45℃without derating

   Storage temperature

  -40℃~+70℃

   Altitude

  2000m without derating

   Relative humidity

  ≤90%, no condensation

   Pollution level

  Level IV

   Standard

   IEC 61010-1:2010 IEC 60204-1:2005/A1:2008

   IEC 60068-2-1:2007 IEC 60068-2-2:2007 IEC 60068-2-78:2016

   NB/T 41005-2014 DL/T 1648-2016

   DL/T 1215.1-2013 DL/T 1215.2-2013 DL/T 1215.3-2013

   DL/T 1215.4-2013 DL/T 1216-2013

   GB/T 17626.8-2006 GB/T 17626.12-2013 GB/T 17626.18-2016

   GB/T 2423.1-2008 GB/T 2423.2-2008 GB/T 2423.3-2016

  WhatsAPP: +86-13928032657
   Skype: zhwld08
   Phone: +86-13928032657
   E-mail: daniel.wu@sinopakelectric.com
    Add:Office 801, No. 1316 Caixia Street, Hengqin, Zhuhai City, Guangdong Province, China

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