Container-Type STATCOM
Modular and Flexible System Design Concept
FlexVAr® is based on Modular Multilevel Converter (MMC) technology with advanced digital control system consisting of up-to-date DSPs and FPGAs. According to reactive power needed, one or more than one modular multilevel converters (MMC) can be used for FlexVAr® with or without coupling transformer which depends on the system voltage. Each MMC has its own control system and in any internal fault, the related MMC is disconnected automatically and the remaining ones continue to operate without any system interruption.
Containerized Solution is adopted for packaging of MMCs, control system panels and water cooling pumps which provides easy installation in the field as well as transportation.
Capacitor banks designed as LC(R) type harmonic filters can also be used for loads having more capacitive reactive power requirement than inductive, in combination with MMCs (Hybrid STATCOM Solution) to decrease the overall system cost.
Solutions
- Reactive Power Compensation
- Load Balancing
- Voltage Unbalance Compensation
- Voltage Regulation
- Flicker Mitigation
Applications
- Utilities
- Iron & Stell Industry
- Wind & Solar Power Plant
- Oil & Gas Industry
- Process Industry
- Mining/Welding/Rolling Mills
Main Features
- MMC Technology
- Modular and Flexible Design
- Delta or Star Configurations
- Containerized Solution
- Advanced Digital Control Platform
- Low Output Harmonics
- Auto-Reclose Function
- Remote Monitoring and Control
- Water Cooling Technology
- Low Voltage Fault-Ride Through (LVRT)
| Technical Specifications |
| Rated Voltage |
Direct Connection: 12kV-36kV
Transformer Connection: 36kV-400kV |
| Frequency |
50Hz/60Hz |
| Rated Power |
10MVAr-50MVAr |
| No. of Parallel Modules |
2-5 |
| Converter Technology |
MMC // Delta or WYE Connection with HV IGBTs |
| Control Modes |
Reactive Power Compensation
Load Balancing
Voltage Regulation
Voltage Unbalance Compensation
Flicker Mitigation
Oscillation Damping |
| Response Time |
Response Time: 2-3 power cycles
Settling Time:4-5 power cycles |
| Control System |
DSP/FPGA based digital system for control & protection
PLC for auxiliary controls
HMI for system settings and monitoring
Auto-reclosing function
Remote monitoring and control option |
| Cooling Type |
Water-Cooling (WF) |
| Current and Voltage Harmonics |
Comply with IEEE 519-2014 |
Environmental Conditions
Installation
Altitude (max) |
Indoor/Outdoor
< 1000m
|
User-Friendly Control and Monitoring HMI
Modular Multilevel Converter Structure
Multilevel STATCOM is based on Modular Multilevel Converter Topology using modular H-bridge/half-bridge basic units with IGBT modules. The number of series connected basic units for each phase/arm depends on the system voltage.
The basic units are designed in such a way that it is easy to exchange any faulty units with the new ones during maintenance. Due to perfect voltage balancing of capacitors of each basic unit, by specially developed equalization algorithms, the output current and voltage of FlexVAr® comply with international harmonic standards.
Pulse Width Modulation (PWM) is used as the modulation technique with a moderate switching frequency to have optimum switching loss of IGBTs.
Water cooling technology is the means of cooling down the power semiconductor switches mounted on the cold plates.
Modular Multilevel Converter Structure
