| 摘要 |
FIELD: electricity. ^ SUBSTANCE: as per the first version of the method there measured is output current and output voltage of turbine generator, active power is determined according to them, controlled and compared with reduction speed set points of active power and output voltage, and emergency imbalance of active power is calculated and compared to the set point. As per the second version of the method, the rotor speed is measured, rotor slip is determined relative to synchronous rotation speed and exceedance is controlled with the slide of the specified positive set point. As per the first and the second versions of the method, when set points are exceeded, there formed is pulse control impact on the turbine off-loading. As per the third version of the method, frequency of output voltage, rotor speed and flow of live steam before turbine is measured; negative rotor slip is determined relative to synchronous rotation speed, current power reserve of turbine is determined, exceedance is fixed with current turbine power reserve and with absolute value of rotor slip of the appropriate set points, and when frequency of output voltage is decreased to its set point, there formed is control impact on additional loading (forcing) of turbine, which is proportional to current reserve of its power. ^ EFFECT: improving emergency control efficiency owing to reliable detection of emergency imbalance of powers at early stage of its occurrence and owing to timely formation of control impacts on quick-acting controls of the turbine. ^ 6 cl, 4 dwg |
