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To solve the contradiction between UHV transmission line's over-voltage limitation strategy and its reactive power compensation strategy, China plans to apply controllable shunt reactors in its UHV system. The paper briefly introduces the UHV power transmission system using controllable shunt reactors. The structure and basic operating principle of the controllable shunt reactors is described. Through...
A conventional four-legged shunt reactor serving untransposed extra-high voltage or ultra-high voltage transmission lines may cause the secondary arc difficult to extinguish and result in single-phase autoreclosing (SPAR) failure. This paper proposed an unbalanced shunt reactor (USR) scheme and focuses on the secondary current analysis with respect to untransposed extra high-voltage/ultra-high voltage...
In this paper, the transmission-line theory based fast algorithm for voltage distribution along the UHV transmission line with series capacitors is proposed. Firstly, the two-port transmission parameter matrix of UHV transmission lines is transformed to the two-port node admittance matrix, therefore, the lumped parameters of strict equivalent π model for UHV transmission line is obtained. Secondly,...
State Grid Corporation of China plans to build the Huainan-Wannan-Zhebei-Huxi UHV double-circuit transmission project and install series capacitors (SCs) in Huainan-Wannan transmission lines. During the circuit breakers clearing system faults on series compensated transmission line, the transient recovery voltage (TRV) of circuit breaker may be increased due to the impact of series capacitor. If there...
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