Power Quality Solutions
For most applications in any mill with electrical equipment, there are certain demands and requirements when it comes to power quality and voltage stability as there are limits to the level of harmonics and electrical disturbances in any given power network.
We are able to propose solutions utilising capacitor banks, reactors and damping resistors to effectively implement a passive Harmonic Filter for any requirement and achieve the following benefits:
1. High Power Factor to reduce energy usage due to reactive power consumption.
2. Improved voltage stability, transmission capacity and reduce network losses.
3. Prevent problems with resonance and amplification of possible disturbances.
We offer the following types of medium voltage equipment
1. Fixed Medium Voltage Capacitor Banks
This is the most common solution that is aimed to compensate reactive power of a mill. It is typically used for applications where the reactive power compensated is constant and there are no significant changes to the load.
2. Multi-stage automatic MV Capacitor Banks
For more complex applications with significant load changes, a more flexible design is required by utilising several stages of capacitor banks that can be controlled automatically.
This can be designed based on customisable algorithms such as set point of power factor, set point of harmonics, THD and/or combination of ranges of other different variables.
3. Static VAR Compensation (SVC)
Typically used in applications where load variations are very fast or precise power factor is required. It is recommended to have power electronics switching elements to introduce inductive or capacitive compensating loads as required.
4. Hybrid SVC and Capacitor Banks
Combines both SVC and Multi-Stage capacitor banks to optimise the size of each element.
Technical Specifications : Power Quality Solutions
Configurations
Nominal Voltage
Power Rating
Assembly
Step Configuration
Filtering
Control
Standards
Scope of Work
Capacitor Bank
Static VAR Compensation
Harmonic Filters
3.3 kV, 6.6 kV, 11 kV, 13.8 kV, 20 kV, 24 kV, 36 kV
1,000 kVAr to 200 MVAr
Indoor (Cabinet)
Outdoor (Substation)
Outdoor (Containerised)
Fixed Capacitor
Mechanically Switched Capacitor
Mechanically Switched reactor
Thrysistor Switched Capacitor (TCR)
Thrysistor Controller Reactor (TCR)
Harmonics Filter
None
Damping Reactors
Detuned Filter
Tuned Harmonics Filter
Flexible algorithm with PLC and HMI (standard)
Fixed set point by protection relay (basic)
IEC 60871-1, IEC 60076-6, IEC 61869
Simulation on dynamic and steady conditions
Harmonics and reactive power study
Harmonics and flicker measurements at site
Design of harmonics filter and reactive power compensation
Engineering, manufacturing, supply, civil works and installation at site
Testing and commissioning.