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Inverters in voltage control mode including droop control and virtual synchronous generator (VSG) are promising for interconnecting the renewable energy to the grid, which are both emulating the frequency and voltage regulating functions of synchronous generators through droop method. However, improper transient impact current and reactive power output are observed for inverters in voltage control...
With the integration of distributed generation systems, distribution networks and transmission networks have become more coupled, especially, with respect to voltage problems. This paper presents a decentralized reactive power optimization method for integrated transmission networks and distribution networks based on the generalized Benders decomposition (GBD). The second-order conic programming relaxation...
To improve the safety and reliability of local ventilation of heading face in the coal-mine and prevent gas accumulation effectively, the paper develops a flameproof 660V- high power three-phase emergency power supply (EPS) for auxiliary fan in the mine. The paper illustrates the design and implementation of the battery system which is the core of the EPS, including the design of constitution of high-voltage...
A variety of measures are taken to improve the reliability of power and wind supply of auxiliary fan for heading face in the coal mine, however, almost of all coals adopt the manner of laying cable for power supply at present, when mechanical damages occurred, yet it would cause power and wind cut. Therefore the paper develops a backup flameproof 660V- high power three-phase emergency power supply...
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