Unit integrated control method and system based on area control error of power grid

Abstract

The embodiment of the invention discloses a unit integrated control method and system based on the area control error of a power grid. The unit integrated control method based on the area control error of the power grid comprises the following steps: calculating the area control error ACE according to the power changes between interconnected power grids and the frequency changes of the power grids; obtaining the adjusting times of the unit according to the area control error ACE combined with a dead-time non-linear function of historical data of the power grid operation; obtaining the load adjustment range according to the adjusting times, and predicting the pressure variation of the main steam pressure of the unit caused by AGC adjusting; calculating the deviation value between the set value of the main steam pressure and the measured value of the main steam pressure of the unit, and performing summation operation on the deviation value and the predicted pressure variation to obtain the predicted fluctuation value of the main steam pressure; and controlling the unit adjustment speed according to the predicted fluctuation value of the main steam pressure. The invention judges the range of the action required by the unit and whether the energy of the unit is enough to ensure the performance of the adjustment or not in advance, and filters out unnecessary combustion adjustment atthe boiler side of the unit such as air, coal and water, so as to achieve the purpose of energy saving and consumption reduction.

Description

Technical field [0001] The invention relates to the technical field of network source coordinated control, in particular to a unit integrated control method and system based on grid area control deviation. Background technique [0002] Under the new situation of interconnection between UHV power grids and large-area power grids, power grids at all levels are increasingly connected, and the requirements for coordination and cooperation between power grids and units are getting higher and higher. At the same time, my country's new energy installed capacity and power generation are rapidly increasing, and the proportion of new energy installed capacity (wind power, photovoltaic, nuclear power) has increased from less than 16% at the end of 2016 to more than 18.5% at the end of September 2017. As of September 2017, the total installed capacity of new energy reached 275GW, and the new thermal power installed capacity accounted for only 33%, which was far lower than the 64% in the inve...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a unit comprehensive control method and system based on the regional control deviation of the power grid to solve the problems in the prior art that the main steam pressure fluctuates greatly due to too fast power adjustment rate, and the main steam pressure and temperature of the unit are unstable for a long time question

Images