Abstract:

In ultrahigh voltage power gird receiverside, primary frequency modulation became more and more important. Large scale coalfire power is responsible for primary modulation, but many units cannot achieve expected performance, and problems barely can be detected by performance tests. By analyzing tested units, prohibition and frequency modulation counter action logic was indicated. Corrected sliding pressure curve, which increases frequency modulating ability, and corrected feedforward coefficient was provided. This could be referred by different kind of unit.

Key words:

primary frequency modulation performance, control logic optimum, frequency modulation removal counter logic, fixed sliding pressure curve；feedforward coefficient of correction