Use of Smart Loads for Power Quality Improvement

Abstract

Abstract-Electric spring (ES) was originally proposed as

Achieving Multiple Functions of Three-Phase Electric Springs in Unbalanced Three-Phase Power Systems Using the Instantaneous Power Theory

“…In Fig. 2 This load-dependent characteristic was studied in [21]. Two general conclusions are drawn as 1) the power factor of the noncritical load does not affect △Inc_A/B/C, while the voltage rating of the ES and the impedance of noncritical load determine the size of the dispatchable range, and 2) the power factor of the noncritical load has an impact on the power decoupling of the ES.…”

“…1, the vector equation of the noncritical load current is given in (1). For simplicity of analysis, the noncritical load is assumed to be resistive, although it is not a necessary condition [14], [20], and [21]. …”

An overview of power quality enhancement techniques applied to distributed generation in electrical distribution networks

“…3) [153], which can follow the power generation profile. By means of the distributed smart loads in electrical power system, stability of power system will increase independently of the communication system and information [146].…”

“…By means of the distributed smart loads in electrical power system, stability of power system will increase independently of the communication system and information [146]. If a power system could be imagined as a mattress, and subsidence of mattress as voltage drops all over the network, using mechanical springs to avoid mattress subsidence is somehow identical to using electric springs to avoid voltage drops and help improving voltage stability, this concept could be better understood by details in [147,148,153,154]. Its most important advantage is that by the failure of few springs systems stays stable.…”

Review on Distributed Energy Storage Systems for Utility Applications

“…To compensate grid harmonics, numerous active and passive filtering techniques were developed [18]- [19]. However, installing additional filters is not favorable due to extra costs.…”