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The Development of the Integrated Volt/Var Control Device at the Substations

Author: WuChengLin
Tutor: YangXiaoPing；LiuQiang
School: Xi'an University of Technology
Course: Hydraulic Engineering
Keywords: And reactive power control Nine districts map Instantaneous Power Theory Programmable computer controller
CLC: TM761
Type: Master's thesis
Year: 2005
Downloads: 225
Quote: 0
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Abstract


With the improvement of the quality of power supply requirements , the voltage has become an important indicator for measuring power quality , power system voltage and reactive power are closely related . Therefore, the substation voltage and reactive power integrated control of great significance to improve the voltage quality . Completed the design of the substation and reactive power control device , the device to overcome the defects of traditional voltage and reactive power control device for switching circuit breaker the thyristor to action using non-contact switch , with a great sense of promotion . First elaborated the principle of voltage and reactive power control , detection method based on instantaneous power theory , and for the nine districts figure flaws and take a corresponding improvement measures . Software and hardware design of the system are used to the modular design concept , and has good portability . Controller using Programmable Computer Controller ( PCC ) , it is first calculated based on the acquisition of three-phase voltage , current rms voltage and reactive power , according to the control strategy , and integrated a variety of constraints , to achieve accurate load capacitor the regulator transformer taps reliable action . In software design , system design method of time-sharing and multi-tasking operating system , comes with PCC AB language programming to improve real-time and operational efficiency of the device . During the design process , but also to take a series of hardware , software, anti-jamming measures . The performance of the device , ensure that the voltage qualified and reactive basic balance in the substation under various modes of operation , and can meet the requirements have the OLTC transformer taps to adjust the number and shunt capacitor switching times .

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system automation > Automatically adjusts
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