Control method of AVC (Automatic Voltage Control) system
A control method and technology for controlling variables, applied in information technology support systems, electrical components, voltage adjustment of AC networks, etc., to achieve the effect of improving computing efficiency and reducing the number and scale of
Inactive Publication Date: 2015-05-20
SOUTHEAST UNIV
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a control method for the AVC system, which can realize the immediate response and control of the AVC system in a disturbed state according to the requirements of the automatic voltage control of the power grid, and solve the problem of AVC The blind zone problem of the system in the disturbance state, so as to fully ensure the voltage controllability of the power system
Method used
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[0021] According to the IEEE-14 node system (such as Figure 4 As shown), the voltage automatic control includes two parts: transformer sub-tap control and generator terminal voltage control. Among them, the generator at node 1 is used as a balancing machine and does not participate in voltage control; the control variables of the terminal voltage of the four generators are continuous variables, and the control variables are G2, G3, G6, G8, and the adjustment range is 1.0-1.1p.u.; The tap control is a discrete variable, where the levels of T4-7 and T4-9 are both 17, and the levels of T5-6 are 9.
[0022] The level numbers of T4-7, T4-9 transformers are listed as
[0023] level number
1
2
3
4
5
6
7
8
9
value
0.9
0.9125
0.925
0.9375
0.95
0.9675
0.975
0.9875
1
10
11
12
13
14
15
16
17
value
1.0125
1.025
1.0375
1.0...
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The invention discloses a control method of an AVC (Automatic Voltage Control) system. The control method comprises the following steps of carrying out initial variation on adjustable control variables to obtain a control variable set; selecting a variable horizontal number with maximum adjustable horizontal numbers in discrete variables as a problem horizontal number N; carrying out corresponding variation treatment on other discrete variables to obtain values serving as N horizontal data; obtaining values corresponding to the control variables of the system under N operation states according to an uniform designing method according to the control variable set after the initial variation; gradually calculating objective functions under each state and outputting the control variable parameter corresponding to an optimal solution; sending control commands to sub-stations by a main station according to the obtained control variable parameters to implement automatic voltage control. The control method has a premise of ensuring the optimality of an overall reactive voltage optimization result of the system; the optimization calculation frequency and scale are greatly reduced; the calculation efficiency is improved, so that the control requirement of timely response between the main station and the sub-stations can be met.
Description
technical field [0001] The invention relates to a control method applicable to an AVC system in a disturbance state, and belongs to the field of automatic control of reactive power and voltage of electric power systems. Background technique [0002] Voltage control plays an important role in power system operation analysis. With the substantial improvement of the level of science and technology, more and more smart home electrical equipment has entered thousands of households, so the user side has put forward more and more stringent requirements for power quality. As an important part of power quality, voltage quality is not only related to the user's power consumption experience, but also plays an important role in power transmission on the power generation and transmission grid. Therefore, no matter from the point of view of the power supply and distribution network or the generation and transmission network, the voltage problem is an important issue. [0003] With the a...
Claims
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Login to View More IPC IPC(8): H02J3/12
CPCH02J13/0079H02J3/16Y02E60/00Y04S10/16
Inventor 高山刘宇诸晓骏李炳汝
Owner SOUTHEAST UNIV