Abstract

The paper examines current issues related to the stability and reliability of power supply in the context of an increasing share of renewable energy sources (RES). Particular attention is paid to operational reliability and voltage regulation during power fluctuations, which is a key aspect for stable operation of electrical networks incorporating distributed RES. The first part of the work analyzes the application of FACTS (Flexible AC Transmission Systems) devices in modern distribution networks. The critical factors related to voltage regulation under power fluctuations, essential for maintaining operational reliability, are discussed. In particular, the functional limitations of traditional regulators for voltage control in electrical networks with a large number of distributed RES and flexible loads are analyzed. The second part of the paper focuses on developing the backward/forward method for calculating power flows in distribution networks integrating wind farms. The methodology allows more accurate modeling of dynamic processes in the network and assessment of their impact on voltage and other electrical parameters. The experimental study has revealed that such FACTS devices as static VAR compensator and STATCOM effectively manage automatic online voltage regulation in the distribution network, which is particularly significant given stochastic fluctuations in active power caused by the operation of wind farms.

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