| 摘要 |
A method and a device for recognizing defects in a triggering system of a controlled series compensator. An intervention is made in the closed-loop control of the controlled series compensator on the basis of an impedance differential (.DELTA.Z) determined from a setpoint impedance (ZS1,ZS2) and from an effective impedance (Zi) calculated from system variables (iL,uC), and in dependence upon the voltage level of a measured conduction current (iL). When the conduction currents (iL) are smaller than a limiting value (iLG), the firing is blocked in the branches, and when the conduction currents (iL) are greater than a limiting value (iLG), a firing-angle signal (S.alpha.s) is generated, through which means the valve (Th1, Th2) can be protectively fired. Thus, one is able to recognize defects in the triggering system of the controlled series compensator by applying system variables (iL,uC), and this series compensator is able to be brought into such a state that disadvantages are avoided for the network operation, through which means the availability of the system and the quality of the compensation are increased. NY1-S://RLM//PF01//128540-67190-923270
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