Deterministic algorithm for selective shunt active power compensators according to IEEE Std. 1459

ABSTRACT: This paper proposes a deterministic algorithm to scale the reference currents of a shunt active power compensator (SAPC) based on IEEE Std. 1459 power decomposition when SAPC maximum output compensating current is going to be exceeded. The selective SAPC is proposed to improve power quality and energy efficiency in power networks by means of the cancelation or reduction of the non-efficient powers (Q1+, SU1, SeN). The non-efficient powers can be reduced in six possible sequences according to the priority of compensation. When SAPC maximum output current capacity is exceeded, the proposed algorithm limits the SAPC output compensating currents and the non-efficient currents can only be partially reduced in the power network. The reduction of the non-efficient powers depends on the selected compensation sequence. Experimental results for several compensation sequences demonstrate the appropriate operation of the selective SAPC using the proposed scaling algorithm

Meaningful Resolution of the IEEE Std. 1459 unbalanced power

This letter present a new resolution of the IEEE Std. 1459 unbalanced power (SU1). The resolution is intended to achieve a better quantification of the power terms included in SU1 . The new definitions improve the quantification of the unbalance phenomena presented in the IEEE Std. 1459. The new power terms included in SU1 extend the measurement capabilities of power meters based on this standard

New Resolution of the Unbalance Power According to Std. 1459

Harmonic distortion and load unbalances have been an important issue in the last few years, motivating a large number of studies in active power compensators used for the power network quality improvement. Following an approach similar to the one used in IEEE Std. 1459 for the non-fundamental effective apparent power, a new resolution of the unbalance power is presented in this paper. The proposed power magnitudes allow explanation of the results obtained when shunt active power compensators are used in customer installations to improve the power quality. Related to the new unbalance power resolution, new merit factors are introduced in this paper to provide a measure of the quality level in the installation. Simulated and experimental results are analyzed in the paper by using the proposed resolution

Improved Shunt Active Power Compensator for IEEE Standard 1459 Compliance

This paper presents the simulated and experimental results of an improved shunt active power compensator (SAPC). The proposed power compensator achieves IEEE Standard 1459 compliance by using moving-window discrete Fourier transform (DFT) calculations to obtain reference currents, and a time-efficient current regulator. The current regulator is based on the analysis of the per-phase electrical model of the (APC). The main feature of the proposed current regulator is the good compromise between current control behavior and time execution efficiency. This compromise results in a low computational cost current regulator with suitable control features, which allows for the implementation of a high-frequency acquisition current control loop, including an extensive computation method based on the use of moving-window DFTs to obtain the proper reference currents with every new sample. The reference current calculations follow the power decomposition proposed by IEEE Standard 1459 for maximum efficiency in supply currents. Simulated and experimental results demonstrate that the proposed SAPC operates correctly under unbalanced and nonsinusoidal conditions. A timing performance comparison is done between the proposed current control and the dq0 technique