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Wind generation rapid development has brought challenge to the grid. Reactive voltage is the most outstanding and one of the most concerned problems. This paper introduces the concept of wind farms reactive power compensation and wind power grid code with respect to reactive power regulation all over the world, gives the simplified approach to estimate reactive power compensation capacity, and validates...
Linear regulators have output specifications far superior to switch-mode techniques, except for the overall efficiency. This efficiency limitation can be overcome by applying a very low frequency supercapacitor circulation technique at the input side of a low dropout regulator IC. The technique was proven in 12V to 5 V versions, and, can be easily applied to other power supplies such as 5 to 3.3V...
The function of reactive power optimization (RPO)is to realize the reactive power of the electric fence and optimal control of voltage in order that the whole network's operation level can be improved and the loss of operation of power network can be reduced. Recently, the research of ORP is mainly focus on the handling of non-liner function and discrete variables and the convergence of the algorithm,...
This paper describes a distributed master-slave multiphase DC-DC converter architecture and related digital control and communication techniques. In the distributed master-slave architecture, all converter modules are identical, but one module operates as the master. The master module communicates its voltage error and current data over a single-wire serial bus to remove the voltage sensing mismatch...
This paper describes a current sharing technique for digitally controlled two-phase buck DC-DC converters where pulse width and resistance mismatches are digitally compensated to achieve approximately equal current sharing without sensing currents. Effects of various non-idealities on the current sharing performance are discussed and corresponding mitigation techniques are presented. An extension...
This paper focuses on efficiency characterization and efficiency improvements in digitally controlled DC-DC converters operating at light loads. An automated efficiency characterization system has been designed based on a Labview controlled laboratory setup and communication with an FPGA based digital controller via serial link. Experimental efficiency characterization results, in conjunction with...
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