Trend recognition method of total regulation power curve in automatic power generation control

Abstract

The invention discloses a trend recognition method of a total regulation power curve in automatic power generation control. The trend recognition method comprises the following steps: step 1, forecasting the total regulation power curve P (t) in the automatic power generation control and dividing a recognition time interval of the total regulation power curve P (t); step 2, judging a total regulation amount trend curve of the total regulation power curve P (t) in the automatic power generation control according to a size relation among a maximum power value, a minimum power value and a current power value in the recognition time interval of the total regulation power curve P (t). Through the trend recognition method of the total regulation power curve in the automatic power generation control disclosed by the invention, the total regulation amount trend curve which can be tracked by an automatic power generation control set is outputted, the occurrence of generator set reverse regulation is effectively reduced, the actual regulation direction of the generator set is consistent with that of a target curve, and the total regulation efficiency is improved through coordinating the increase and decrease of the powers of all power generators.

Description

technical field [0001] The invention belongs to the field of electric power system control, and in particular relates to a method for identifying the trend of a total regulated power curve in automatic power generation control. Background technique [0002] The secondary regulation of the power system is one of the important links to maintain the power balance and ensure the frequency quality of the power system, and the automatic generation control (AGC) is the main means of the secondary regulation of the power system. The automatic generation control strategy system generally includes two main steps: calculating the total regulated power and the distribution of the total regulated power among the units. [0003] In the prior art, the total power distribution method adopts the method of directly sending the total regulated power to the power distribution unit of the power control system for power distribution between units, and the total regulated power sequence often cont...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the total power distribution method adopts the method of directly sending the total regulated power to the power distribution unit of the power control system for power distribution between units, and the total regulated power sequence often contains a large number of repeated fluctuations in different periods, which will Causes: 1) If the unit tracks fluctuations with too small a period, the unit will repeatedly change the adjustment direction and accelerate the loss of the unit

This is because the unit will have a certain adjustment delay. Once the target fluctuation period is too small, the unit cannot adjust the direction of power increase or decrease in time when the fluctuation occurs; when the unit adjustment direction changes, the fluctuation direction changes again. This causes the unit to repeatedly change the adjustment direction, which eventually causes unit loss

2) The fluctuations tracked by units with different adjustment performances have different periods, which makes the adjustment directions between units inconsistent and weakens the overall adjustment effect

Taking the adjustment rate and adjustment delay as an example, the unit that was originally reducing the output power, when receiving the power increase command, the fast response unit has a shorter delay, and can quickly change the output power from decrease to increase; but the slow response unit The delay will be longer, and it will appear that when the fast unit has been converted to increase power, the slow response unit is still reducing the output power, resulting in inconsistent adjustment directions between units and reverse adjustment between units.

[0004] Considering that the system is affected by factors such as the transmission delay of the adjustment signal and the delay of the execution command of the AGC unit, when the AGC adjustment command starts to be executed, the system state may have changed greatly, so it is difficult to achieve the expected adjustment effect

Images