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A STATCOM (Static Synchronous Compensator) is a fast-acting, VSC-based (Voltage Source Converter) device providing stepless, dynamic reactive power compensation (
) to stabilize grid voltage. Unlike switched capacitors, it continuously regulates both capacitive and inductive power within milliseconds, optimizing power factor and reducing harmonics/flicker.
Key Features of Stepless STATCOM Compensation
- Dynamic Response: Offers the fastest response time (typically ) compared to SVCs () or mechanical capacitor banks (seconds/minutes).
- Stepless Regulation: Provides continuously adjustable reactive power () rather than step-wise, ensuring precise voltage control and a high power factor (often).
- Bidirectional Operation: Acts as both a generator (capacitive, ) and absorber (inductive,) of reactive power to manage voltage fluctuations, sagging, or overvoltage.
- Active Power Filter: Modern IGBT-based STATCOMs can simultaneously provide reactive power compensation, harmonic reduction, and balance unbalanced loads.
Technical Principles
- IGBT Technology: Utilizes high-speed insulated gate bipolar transistors (IGBTs) to create a PWM (pulse width modulation) converter, generating a sinusoidal voltage, often via Modular Multilevel Converter (MMC) technology to minimize harmonics.
- Voltage Regulation: The STATCOM controls its own output voltage magnitude to exchange reactive power with the grid. If the STATCOM voltage is greater than the grid bus voltage, it supplies reactive power; otherwise, it absorbs it.
- Fast Response: High-speed, DSP-controlled, high-frequency switching () ensures rapid response to dynamic industrial loads (e.g., arc furnaces) or renewable energy fluctuations.
Common Applications
- Grid Stability: Used in high-voltage transmission networks to increase transmission capacity and support voltage.
- Renewable Energy: Compensates for intermittent power output from solar inverters and wind turbines, helping meet grid codes.
- Industrial Power Quality: Controls voltage flickers, harmonic distortion, and power factor in industrial settings with large motor loads.
STATCOM vs. Other Solutions
- SVC (Static Var Compensator): Slower and relies on Thyristor-Controlled Reactors (TCR) and thyristor-switched capacitors (TSC), which offer less precise compensation.
- Capacitor Banks: Only provide capacitive compensation (no inductive), have slow mechanical switching, and no harmonic reduction.
Benefits
- Improved grid reliability
- Reduced voltage flicker
- Low noise and low harmonic generation
- High efficiency and compact, containerized options
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Web results
Compensation Statcom | Power Conversion & Storage
GE Vernova
https://www.gevernova.com › product-solutions › Comp...
GE Vernova
https://www.gevernova.com › product-solutions › Comp...
A STATCOM offers better dynamic performance than an SVC, in particular a faster response time as well as the ability to generate or absorb reactive power when ...Read more
PQC-STATCON Instantaneous and stepless compensation ...
ABB
https://search.abb.com › library › Download
ABB
https://search.abb.com › library › Download
PDF
PQC-STATCON technology is used for dynamic reactive power compensation, unbalanced load compensation and voltage stability improvement.Read more
Stepless Reactive Power Compensation Suppliers ...
ZDDQ
https://www.zddqelectric.com › stepless-reactive-power-c...
ZDDQ
https://www.zddqelectric.com › stepless-reactive-power-c...
Medium voltage(6kv~35kv) stepless reactive power compensation STATCOM is a voltage regulating device. It is based on a power electronics voltage source ...Read more
Power Quality National Project STATCOM
Marmara Araştırma Merkezi — TÜBİTAK MAM
https://mam.tubitak.gov.tr › power-electronics-projects
Marmara Araştırma Merkezi — TÜBİTAK MAM
https://mam.tubitak.gov.tr › power-electronics-projects
Static Synchronous Compensator (STATCOM) systems, which can generate stepless reactive power, provide an effective reactive power compensation by reducing ...Read more
What is the difference between stepless compensation and ...
Shanghai Yingtong Electric Co., Ltd
https://www.ytelect.com › blog › what-is-the-difference...
Shanghai Yingtong Electric Co., Ltd
https://www.ytelect.com › blog › what-is-the-difference...
Mar 25, 2024 — The stepless compensation system continuously monitors the power system conditions and adjusts the reactive power output accordingly to maintain ...Read more
active Power Control using Z-bus Matrix for Determination ...
IEEE
https://ieeexplore.ieee.org › iel7
IEEE
https://ieeexplore.ieee.org › iel7
by VZ Manusov2014Cited by 1 — STATCOM is an advanced technology in reactive power compensation. Such devices are con- nected to the power system via reactors to the ground. STATCOMs ...Read more
Instantaneous stepless reactive power compensator PQCR+
Hitachi Energy
https://www.hitachienergy.com › capacitors-and-filters
Hitachi Energy
https://www.hitachienergy.com › capacitors-and-filters
PQCR+ is a solid state reactive power compensation solution with high reliability and low loss for dynamic and highly fluctuating loads.Read more
STATCOMs | High-Performance Reactive Power ...
Southern States LLC
https://www.southernstatesllc.com › products › statcom
Southern States LLC
https://www.southernstatesllc.com › products › statcom
Our modular STATCOM (Static Synchronous Compensator) provides real-time reactive power compensation and dynamic voltage support for demanding industrial ...Read more
Simulation Study for Reactive Power Compensation Using ...
ijareeie.com
https://www.ijareeie.com › june › 66_Simulation
ijareeie.com
https://www.ijareeie.com › june › 66_Simulation
PDF
The STATCOM can be used to improve power quality, power factor, system voltage profile, reactive power compensation. This paper develops the vector control.Read more
7 pages
Stepless Reactive Power Compensation Statcom for ...
Made-in-China.com
https://m.made-in-china.com › product › Stepless-React...
Made-in-China.com
https://m.made-in-china.com › product › Stepless-React...
Compared with conventional capacitor compensation scheme, it is precise, two-way, fast reactive power compensation capabilities, and to eliminate the risk of ...Read more