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In this paper, we focus on the objective function of the economic cost and environment cost of wind/solar/diesel/storage micro-grids, and use the method of linear-weighting to establish the optimal scheduling mode of union objective. On the basis of making full use of renewable energy, the genetic algorithm is used to solve the problem of union objective, and created the operation plan of power grid,...
Because traditional direct torque control (DTC) has unfixed switching frequency and ripple of torque and flux, deadbeat direct torque and flux control (DB-DTFC) of interior permanent magnet synchronous motor (IPMSM) is studied. At first, DB-DTFC based on IPMSM mathematical model is deduced. The calculated proper voltage vector can make reference torque and stator flux during one sampling period. But,...
Comparative studies on several direct torque control (DTC) strategies of interior permanent magnet synchronous motor (IPMSM) for electric vehicles (EVs) are discussed in details, namely basic DTC, DTC combined with space vector modulation (DTC-SVM), and deadbeat DTC (DB-DTC). These DTC strategies are reviewed, meanwhile dynamics and steady-state performance are analyzed and compared. Simulations of...
A Sliding Mode Controller of Permanent Magnet Synchronous Motor (PMSM) is analyzed and designed in this paper. Because of non-linearity, strong couple and disturb sensitivity of PMSM, it is difficult for linear control technology to get perfect control performance of PMSM. Sliding Mode Control (SMC) is an efficient robust control method, which can self-adjust controller structure online, and is non-sensitive...
Control Networks are narrow band and real time networks, so the communication authentication mechanism should be simple and effective. A Nonce method using time server was presented in the paper, it applies the authentication on application layer. Digest was used as system authentication and that used received or sent data as digest data. This method should meet most cases requirement of control networks,...
A direct torque control (DTC) strategy based on observing stator flux linkage for permanent magnet synchronous motor (PMSM) was investigated. Traditional DTC can adjust the torque and flux linkage just with only 8 basic voltage space vectors. It has rapid dynamic response, but, it also has the shortcomings: ripple of torque and current, variable switching frequency, and poor performance while low...
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