20-10-2016, 12:21 PM
1460136558-TINKU.PPT.pptx (Size: 106.11 KB / Downloads: 7)
ABSTRACT
The concept of electric spring has been proposed recently as an effective means of distributed voltage control. The idea is to regulate the voltage across the critical loads while allowing the noncritical impedance-type loads to vary their power consumption and thus contribute to demand-side response. In this project, a comparison is made between distributed voltage control using ES against the traditional single point control with STATic Compensator. For a given range of supply voltage variation, the total reactive capacity required for each option to produce the desired voltage regulation at the point of connection is compared. A simple case study with a single ES and STATCOM is presented first to show that the ES and STATCOM require comparable reactive power to achieve similar voltage regulation. Distributed voltage regulation through collective action of a cluster of ES. In this project, the focus is to compare the effectiveness of single point voltage control using STATCOM against distributed voltage control using a group of ESs. The basis for comparison is total voltage regulation achieved and the overall reactive capability required for each option in order to achieve that. The voltage regulation performance and total reactive power requirement of a group of ESs in case of distributed voltage control is compared against the single-point control using a STATCOM. In both cases, it turns out that a group of ESs achieves better total voltage regulation than STATCOM with less overall reactive power capacity.
INTRODUCTION
VOLTAGE control in medium voltage (MV) or low voltage(LV) distribution networks is typically exercised through transformer tap-changers and/or switched capacitors/reactors. Sometimes a STATic COMpensator (STATCOM) is used for fast and precise voltage regulation, especially for the sensitive/critical loads. The novel concept of electric spring (ES) has been proposed as an effective means of distributed voltage control. The idea is to regulate the voltage across the critical loads while allowing the noncritical impedance-type loads to vary their power consumption and thus contribute to demand-side response as well. The focus is to compare the effectiveness of single point voltage control using STATCOM against distributed voltage control using a group of ESs. The basis for comparison is total voltage regulation achieved and the overall reactive capability required for each option in order to achieve that.
ADVANTAGES
Achieves better total voltage regulation with less overall reactive power capacity.
The reactive power capacity of STATCOM is not limited until the current limits are violated.