Differential adjustment coefficient and AVC substation cooperation setting method and system

Abstract

The invention relates to a difference adjustment coefficient and AVC substation cooperative setting method, which comprises the following steps of: 1, judging whether a difference adjustment coefficient of a power grid unit meets a standard or a requirement of a scheduling department, if not, executing a step 2, and if so, executing a step 4; 2, optimizing and setting a difference adjustment coefficient, setting according to related standards or requirements of a scheduling department, and reducing the total difference adjustment of one power generation unit so as to improve the response sensitivity of the unit to the voltage of the power grid; 3, judging whether the difference adjustment coefficient meets the standard or the requirement of a scheduling department, if not, returning to the step 2, and if yes, executing the step 4; 4, an AVC substation debugging test is carried out, and the adjusting pulse width of the AVC substation is set under the condition that the target of the AVC limiting function test is met; and 5, judging whether the AVC substation control precision and rate are met or not, if so, finishing setting, and if not, returning to the step 4. Compared with the prior art, the method has the advantages of improving the AVC substation adjustment success rate and the like.

Description

technical field [0001] The invention relates to the technical field of AVC sub-station debugging, in particular to a method and a system for coordinating adjustment of an adjustment coefficient with an AVC sub-station. Background technique [0002] like figure 1 As shown, the definition of the regulation coefficient of the generator excitation system refers to the curve slope relationship of the generator terminal voltage with the change of the generator reactive power. According to the slope characteristics of the curve, it can be divided into positive regulation, negative regulation and In zero adjustment, the adjustment coefficient of the voltage decreasing with the increase of reactive load is positive, which is called positive adjustment; on the contrary, the adjustment coefficient of voltage rising with the increase of reactive load is negative, which is called negative adjustment. [0003] There is a problem in the adjustment of the difference adjustment technology a...

AI Technical Summary

Problems solved by technology

[0003] There are problems in the adjustment and adjustment of differential adjustment technology and AVC (Automatic Voltage Control, Automatic Voltage Control): At present, the Shanghai Power Plant has completed the debugging of the AVC system. Negative differential adjustment technology is used on the unit commissioned by the AVC system, which will change the adjustment pulse width of the excitation system. The step size of AVC adjustment may increase with the increase of the negative differential adjustment coefficient. In severe cases, it will exceed the dead zone of AVC. , causing the AVC regulation to fail

[0004] The current AVC debugging test or the adjustment of the adjustment coefficient does not consider the cooperation or mutual influence between the adjustment coefficient and AVC. The unreasonable setting of the adjustment coefficient or the unreasonable setting of the AVC adjustment pulse width will lead to two possible situations: AVC The sub-station cannot correctly execute the adjustment command of the AVC master station, resulting in AVC adjustment failure; the single adjustment pulse width of the AVC sub-station increases, resulting in a decrease in the adjustment accuracy of the AVC sub-station, so the adjustment coefficient of the unit and the AVC sub-station must be adjusted together , to meet the control accuracy and speed of the ACV substation, and ensure the successful adjustment of the AVC substation

Images