| Voltage is one of important criterion to weigh the power quality,the change on voltage makes great effect on load opperating-characteristic,reactive power is near to voltage level,the flow of reactive power in transmission net causes voltage loss power institute take many measures to improve the voltage level,thereinto, voltage and reactive power integrated control is most effective measure to lessen the power loss and improve the voltage level.The basic theory for voltage and reactive control and the taps changed in transformer and shunt capacitor switched affect the voltage value are discussed in the paper.The oscillation is easily generated and the times is increased the power suffer impact because increment is ignored by traditional criterion for voltage and reactive control. The criterion of voltage and reactive power control considering the increment of adjusting is put forward corresponding to these problem in this paper,this criterion can confirm the adjusting object for voltage and reactive power control exactly and can avoid the oscillation.Many new criterion have adopted artificial intelligence but it is difficult to realize them besides they can't really realize the controlling object-make the power loss reach to bottom.The power loss in line , the power assumption on load and the contribution of the shunt capacitor change when voltage is adjusted,so adjustment can be exactly realized and the times of taps changer when considering these increment.In the hardware of this control system,the MCS96 single-chip-microcomputer system is adopted under demand of field,the ability of data processing is strengthened.In order to improve safety and reliability of control,the blocking is designed,when in the fault of the control system and the power system ,the protect set can make use.Many measures are used to anti-jamming in this design In the end of the this papers simulation experiment aml emulational example verify the fine effect of the criterion.
|
PDF Full Text Request