Research on Impact of TCPST on Receiving-End Power Grid with UHVAC and UHVDC Accessing

doi:10.11930/j.issn.1004-9649.201612033

Abstract

Abstract: With the rapid development and construction of ultra-high voltage (UHV) power grid, the control of power grid turns to be more complex. Using TCPST (controlled phase shifters) and other advanced flow control devices to solve power system planning and operation problems has broad application prospects. In order to study the influence of controlled phase shifter on the security and stability of power grid, basic principles and topologies of TCPST are investigated. The steady and instantaneous models for the controlled phase shifters are also established. The series and parallel transformer parameters are designed. Taking Jiangsu power grid as an example, 500 kV TCPST is applied in the area near Jinsu UHVDC project. The application effect of TCPST is analyzed. Simulation results show that TCPST can solve the problems of DC power reject in small load mode and the DC power output in large load mode, which reduce load losses by 1000 MW after UHVDC bipolar blocking. At the same time the recovery voltage of Suzhou South grid can be improved by 5~10 kV after the failure of power grid. The application of the TCPST can have a positive effect on the protection of security and economy of power grid.

Key words: controllable phase shifter (TCPST), flow flow control, ultra-high direct current (UHVDC), bipolar blocking

CLC Number:

TM744

WEI Peng, ZHOU Qian, ZHU Xinyao, JI Tuo, ZHANG Ningyu. Research on Impact of TCPST on Receiving-End Power Grid with UHVAC and UHVDC Accessing[J]. Electric Power, 2018, 51(7): 7-12.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201612033

https://www.electricpower.com.cn/EN/Y2018/V51/I7/7

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