SVC
STATIC VAR COMPENSATOR
www.rxpe.comSVC
STATIC VAR COMPENSATOR
01 Owning patented heat pipe cooling technology for SVC 05 Possessing most SVC patents in China
02 Largest total capacity of SVC deployed in the world 06 The only one of IS9001 approved SVC in China
03 Best cost-value ratio of SVC in the world 07 Main drafter of SVC national standard
04 Having the only HV full capacity tseting center in China 08 The international standard is applied for SVC
RongxinPower Electronic Co.，Ltd. (RXPE) is one of the biggest SVC manufacturers in the world. RXPE enjoys a
13-year manufacturing history for more than 700 sets of SVC，the largest total capacity globally.
So far，RXPE’sSVC systems have been widely used not only in China, but also in Vietnam, Thailand, Burma, etc.
RXPE’sSVC systems are widely used in the fields of rolling mills, EAF, coal, heavy machinery, electric railway and
power systems. RXPE has made a great contribution towards the improvement of electric energy and energy-
saving for the power distribution system.
RXPE is a specialized SVC manufacturer with strong designing andmanufacturing abilities, providing customers
with high quality products at very competitive price. 100% parts and finished products are thoroughly tested for
each order. The company’s technical strength and efficient service enable RXPE to provide the world-class SVC
solution, greatest value for customers, thorough testing, shortest response time, best service and full technical
support. RXPE’SVC control system is granted the CE standard of EV. As a remarkable success, there have never
been serious faults in RXPE’sSVC equipments which have been proven to have top quality by existing deployment.SVC
STATIC VAR COMPENSATOR
Quality Problems of Power in Existing Electric Network
Power quality is generally indicated by stability, symmetry ●Faults of protective and automatic equipments.
and current wave characteristics and so on. As more
●The amplification of resonance and harmonic currents
modern nonlinear loads are connected to the grid, the
of the capacitors, which may lead to the capacitors’
power quality has been seriously affected. The mass
overload or over-voltage or burning.
application of various power electronic devices and the
frequent fluctuation of the loads are main sources of the ●Increasing loss of transformers which will result in
disturbance which results in many negative impacts to heat increase of the transformer。
the grid.
●Heat increase of the electrical equipments, the
◆Low power factor, high power loss, high productive instability of motor and even burning of the motor.
cost and low productive efficiency.
●Acceleration of insulation deterioration of electrical arc
◆Resulting in reactive power impact, voltage dropping furnace (EAF) and increment of losses.
and voltage flicker of the grid. In some cases even
●Disturbing communication signals.
causing the driving and protection equipments’
◆3-phase unbalance which causes negative-sequence
malfunction or shutdown.
current which causes vibration of motor rotors.
◆Causing harmonic currents which may lead to：
●Grid voltage distortion.
Typical Reactive and Active Curves of 4 Housing Rolling Mill Voltage Distortion Caused by 5th HarmonicSVC
STATIC VAR COMPENSATOR
SVC is the best solution to the problem of electric energy quality
SVC of TCR type
SVC is connected to the system as the follow Fig. The control system adopts the currents and voltage
Capacitors provide fixed capacitive reactive power. of the system and calculates the reactive power
TCR provides inductive reactive power which is which will be compared with the preset value (may
decided by the current through the TCR. The be 0). According to the result, the control system
system must try to satisfy the equity: works out the triggering angle of the thyristorsand
triggers them at this angle.
QN=Qv-QNc+Qtcr=0, so that the power factor is a
constant and there will be no fluctuation of the Rongxin’
voltage. The most important is to control the pass
s SVC has the ability of single phase regulation
angle of the thyrisorsprospectively to obtain the
based on the theory of Steinmetswhich makes
needed currents in order to provide the needed
Rongxin’sSVC excellent in distinguishing the
reactive power.
negative frequency currents.
Q total reactive power of system
N
Q reactive power of load
V
Q reactive power of filter
C
Q reactive power of TCR
TCR
Working Principle of SVC
Fig: SVC Single Phase DiagramSVC
STATIC VAR COMPENSATOR
Quality Problems of Power in Existing Electric Network
Rolling Mill
Reactive shocks generated by the rolling mills and other industrial
symmetric loads may cause the following effects to the grid:
■The voltage drop and fluctuation, which may result in malfunction of electric
equipment and reduce the productive efficiency.
■Low power factor
■The harmful high-order harmonic waves in the driving devices, typically 5th,
7th, 11th, 1R3th and soide-frequnencies,g which will caxuse seriiousn voltage
distortion. RXPE’sSVC system can solve those problems perfectly. It ensures
the stability of the bus bar voltage, reduces the harmonic currents
substantially and makes the power factor close to 1.
Power
Electric Arc Furnace (EAF)
The electric arc furnace is a typical non-linear load, cEausinlge a sceriets rofo nic
negative effects：
■Serious unbalance of the grid and negative-sequence currents.
Co.,Ltd.
■Harmonic currents which cause the voltage distortion.
■Serious voltage flickers.
■Low power factor
The best way to solve the problems mentioned above is to installSVC with
rapid response time. Based on the instant reactive power theory,the response

Static Var Compensator (SVC) is an advanced power electronics-based device used in high-voltage electrical grids for dynamic reactive power compensation. SVC, also known as a static variable compensator, is specifically designed to provide voltage regulation and improve power quality by compensating for the grid's varying reactive power demands. In its operation, an SVC consists of thyristor-controlled devices that connect or disconnect between the transmission line and a bank of capacitors or inductors. It can either absorb or generate reactive power depending on the needs of the system, thus counteracting voltage imbalances caused by loads with fluctuating reactive power requirements, such as induction motors or lighting systems. By doing so, SVCs help maintain stable voltage levels, reduce transmission losses, and prevent equipment damage due to overvoltage or undervoltage conditions. The英文 version of SVC High-Voltage Grid Dynamic Uncompensated Device would be: "SVC Static VAR Compensator is a cutting-edge power electronic device employed in high-voltage power networks to address the need for dynamic reactive power compensation. This technology involves the use of thyristor-controlled components to link or unlink a bank of capacitors or inductors with the transmission line, allowing for the control of reactive power flow within the grid. The SVC's primary function is to regulate voltage, enhance power quality, and mitigate issues stemming from the grid's changing demand for reactive power – which may arise from loads like induction motors or variable lighting loads. By precisely managing these variations, SVCs contribute to maintaining steady voltage levels, minimizing energy loss during transmission, and preventing equipment damage from voltage fluctuations."