Abstract:There is a growing interest in the parallel operation of Voltage Source Converters (VSCs) both in an isolated microgrid or connected to the utility grid. The most common solution in the literature for the paralellization of VSCs is the socalled droop control, which brings about a relationship between active power and frequency. In this paper, a different approach is proposed where reactive power is used instead of active power to ensure synchronous operation. Active and reactive power are independently control… Show more
“…) 𝜔 (27) but with the difference that the output signal is a voltage instead of a frequency. As the voltage variation gives rise to a reactive power exchange, the compensator is denoted as POD-Q.…”
Section: B Statcom Stabilizermentioning
confidence: 99%
“…In [26], a grid-forming converter tuning method for damping subsynchronous interaction in electrical grids using artificial intelligence is presented. All the aforementioned techniques use an active power synchronization (APS) loop; however, a similar technique based on reactive power synchronization (RPS) has been reported in [27] and [28]. In [29], the POD-P control proposed acts on the internal frequency deviation of the synchronization loop using the active power increment as input.…”
“…) 𝜔 (27) but with the difference that the output signal is a voltage instead of a frequency. As the voltage variation gives rise to a reactive power exchange, the compensator is denoted as POD-Q.…”
Section: B Statcom Stabilizermentioning
confidence: 99%
“…In [26], a grid-forming converter tuning method for damping subsynchronous interaction in electrical grids using artificial intelligence is presented. All the aforementioned techniques use an active power synchronization (APS) loop; however, a similar technique based on reactive power synchronization (RPS) has been reported in [27] and [28]. In [29], the POD-P control proposed acts on the internal frequency deviation of the synchronization loop using the active power increment as input.…”
“…With the frequency deviation obtained, the reference angle is given by: Fig. 2 shows the reference angle calculation from ∆ω using reactive power deviation with a droop constant , according to equations (5) and (6), which has been proven to be more stable than the active power synchronization [12], and it has better behaviour than the widely used PLL synchronization methods.…”
Section: Reactive Power Synchronizationmentioning
confidence: 99%
“…Trying to emulate the synchronous generator's synchronizing torque, the idea of a Virtual Synchronous Machine has been proposed by many authors [7]- [9]. VSMs have been proven as an effective method for both grid supporting and grid forming operations, facing many stability issues and providing virtual inertia to the power system [10]- [12]. Nowadays, this transition between grid forming and grid supporting control strategies is being addressed very often in the literature [13]- [15].…”
This paper presents a Voltage Source Converter (VSC) with an implemented Virtual Synchronous Machine (VSM) control strategy, which is able to work in both grid-tied and islanded mode, providing inertia to the grid and regulating the frequency and the voltage of the system. Those capabilities are necessary to make possible a high penetration of power electronic converters in the power grid. Converters work in parallel with the conventional generators while being able to deal with islanding or some other critical grid events. The proposed control strategy has been tested in a test bench with a synchronous generator (SG). When islanding the VSC, the converter demonstrates its grid forming capabilities controlling the frequency and voltage of the microgrid. The VSM control has proved its grid forming and grid supporting capabilities, without switching between control modes, making it ideal to react to different grid events and showing a soft transition between grid-tied and islanded operation modes.
“…Power electronics converters (PECs) make the electrical distribution grid more flexible by the integration of different types of sources, loads, digital control modules. Electrical energy can be more accurately monitored and managed at every processing step, from generation through distribution, conversion, and storage to consumption [1], [2]. Adaptation of PECs to the existing state of distribution system demand many challenges in order to maintain high power quality and efficiency as well as high reliability and low cost in comparison to currently used technology.…”
Three-phase power electronics converters (PECs) are commonly used as an interconnection of DC loads/sources with the electrical AC power system. Their important goal is to ensure three-phase symmetrical and pure sinusoidal grid current waveforms. Unfortunately, frequent adverse of grid voltage conditions like the occurrence of higher order harmonics and dips/sags leads to problems in maintaining high-quality parameters of current and stable operation of PEC. Therefore, a more complex control algorithms are usually used to solve those problems. In this paper, effective and simple control is proposed to mitigate grid current distortions caused by grid-voltage harmonics. This improvement of current quality can be easily obtained in control of grid-connected PEC using only band notch filtered grid voltage as a feedforward without any additional control loops parallel connected to linear current controllers (tuned to fundamental frequency). Theoretical analysis with simulation and experimental investigations are presented, which prove very good properties and advantages of the proposed control idea. INDEX TERMS Current harmonics mitigation, DC-AC power conversion, grid distortions, harmonic distortion, voltage control.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.