Distribution system reconfiguration is the main measure to optimize the distribution system, which can dramatically lower the power loss of the network. This paper deals with the switch operation sequence considering closed-loop current constraints and puts forward the concept of “switch compounding”. A new implementation strategy is proposed to realize a feasible operation sequence. The strategy is tested on IEEE33 system, which verifies the effectiveness of the strategy.
A remotely controlled energy saving combustion control system is developed in this paper. The system includes three parts: upper computer, communication program between upper and lower computer, lower computer control program. Friendly human-machine interface is designed by Labview, which realizes the remote control of PLC; With Visual C, a standard dynamic link library is designed and debugged, by which the serial communication between PC and PLC can be realized; According to the scheme of air-fuel ratio, the control programs are achieved by PLC, which realizes energy saving combustion. The results of experiment in PLC experimental platform shows that the PC can effectively control the PLC .The scheme of air-fuel ratio is similar with the actual situation.
A kind of Static Var Compensator(SVC) subsection control strategy for transient process of dynamic load is presented in this paper. The strategy can determine SVC's action according to the condition of system and load so as to output different compensation capacity in different stage to make dynamic load stable and make sure the voltage is qualified; SVC will be shut when it's noneffective in this strategy so that other regulate way can be used timely. The validity and accuracy of the strategy is verified in tow-bus equivalent system.
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