Introduction to PowerLogic™ DVR System

PowerLogic™ Master Range

PowerLogic™ smooths the power supply, protects the network, the installation and the operator by improving the power factor and hence the quality of the power. It also allows for remote control of equipment and the monitoring of its performance and condition in real time.

Introduction

Challenge

Due to natural phenomena, the energy generation systems, transportation systems, and distribution systems have certain limitations. These systems can cause electrical disturbances due to factors such as consequences of manoeuvres, breakdowns, atmospheric phenomena, or disturbances introduced by receivers. These disturbances can affect the processes and/or services and can have significant economic consequences for companies.

Most of the existing equipment in the industry meets the sensitivity curve defined by IEEE 446 standard as shown in the following image. The equipment will operate normally without any problem while the voltage is in between the two lines of the curve, as shown in the light grey area.

Unfortunately, the electrical grids are not always between the two lines. The disturbances in the electrical grids are represented by dark grey areas and it depends on the magnitude and duration of the disturbance. These disturbances cannot be eliminated completely, so it is necessary to adapt the customer facilities in order to help to protect from the disturbances that can impact the normal operation and to minimize the disturbing emissions that can be generated and introduced in the electricity grid.

The typical range of the disturbances that usually causes problem time duration of 0-500 milliseconds and voltage drop of -10 to -40%. Although, the most serious disturbances can reach -60%, when suffering greater lapses of time. The detected failure in the mains could produce a series of disturbances due to automatic reconnections while trying to correct these detected faults. This series of disturbances often requires that the voltage compensation equipment operates for several seconds.

Solution

The PowerLogic™ DVR system is a flexible compensator that injects and absorbs energy and helps to mitigate and eliminate the effect of electrical disturbances. It offers an extremely stable voltage (Vn ±1%) with a very fast response.

The topology of the PowerLogic™ DVR system allows to continuously regulate nominal voltage up to a certain percentage or compensates voltage sag from deeper percentage without using energy storage such as battery or capacitors. The system mitigates other network quality problems, such as fluctuations, Flicker effects, regulation problems, and voltage imbalance. The system is designed for the demanding process industry, data centres, and in general, for customers with high regulation accuracy.

PowerLogic™ DVR System Range

The following table shows the full range of PowerLogic™ DVR systems based on disturbance correction capabilities.

The PowerLogic™ DVR system can be formed by one master unit only, or by a parallel system consisting of one master unit and a maximum of two slave units.

The PowerLogic™ DVR systems require an additional manual bypass cabinet. It is mandatory to install this cabinet as it has the following functionalities:

• Allows continuous power supply to the load during the maintenance of the system.

• Works as a distribution cabinet to facilitate the power connection between units that are in a parallel system.

Depending on the nominal current of the system, there are four manual bypass cabinets (630 A, 1250 A, 2000 A, and 3200 A).

PowerLogic™ DVR System Configurations

The following table shows the system configurations for each PowerLogic™ DVR system and the type of manual bypass cabinet that is required, based on the nominal voltage.