Design and Verification Test of an HTS Leakage Flux-Controlled Reactor

Controlled reactors can adjust the output capacity to stabilize system voltage, control reactive power, and improve system stability according to operating conditions. The design of reactance and control system determines whether a controlled reactor can meet the requirement of stable operation. In this paper, the operating principle of a high temperature superconducting leakage flux-controlled reactor (HTS-LFCR) is introduced. The design of the reactance and the optimal initial turn-on angle of the control system are discussed. An HTS-LFCR is fabricated and tested. The experimental results show that the reactance design values are basically consistent with the experimental tests; when the initial turn-on angle of the control system is 90°, the reactor can achieve a smooth transition from one operating mode to another.