Research on Frequency Bias Coefficient in Automatic Generation Control;

The selection of the frequency bias coefficient β is of the most importance to system stability and frequency recovery,and the ideal situation is to set β the same as the natural frequency of the local area.

In order to implement object-controllability and ahead control of automatic generation control (AGC), a new method of frequency bias coefficient setting is proposed based on the multi-target optimum technology and super-short-term load forecasting (SSTLF).

Impact on system performance produced by timing and frequency offset in OFDM system;

Theoretical analysis and simulation results show that this scheme has low complexity and good performance to complete the frequency offset and sampling clock frequency offset estimation.

To reduce the impact of carrier frequency offset in OFDM system,this thesis designs a new carrier frequency offset estimation scheme for OFDM system.

The basic concept of the deviation of voltage and frequency, the harm in power system which result from their deviation, the national criterions of voltage and frequency deviation in china and the ways to adjust the voltage and frequency in power system were introduced.

The voltage deviation,voltage fluctuation,flicker,harmonics and frequency deviation are main aspects of power quality problems.

My attention in this thesis is focused on frequency deviation, voltage fluctuation and wind power penetration.

The system deviation of the measurement result of DL—1500 thermal expansion instrument, made by Japanese Vacuum Technique Corporation, was studied in this work.

He put forward the strategy of "conducting tests at selected points and then expanding" which is suitable for current China,established complementary adjusting-controlling theory of feedback-feedforward which com-Rines planning with market,set up the adjusting-controlling theory of appropriate feedback according to the knowledges of system deviations of social economy.