Control method and device for secondary voltage
A secondary voltage control, bus voltage technology, applied in the direction of AC network voltage adjustment, reactive power compensation, etc., can solve the problems of unfavorable central bus voltage rapid stability, easy to cause fluctuations, etc., to achieve the effect of rapid voltage stability and reduced fluctuations
Active Publication Date: 2012-09-12
GUANGDONG POWER GRID POWER DISPATCHING CONTROL CENT +1
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Problems solved by technology
[0005] It is necessary to additionally detect the reactive power transmitted by tie lines between regions; the constraint conditions of the coordinating variables of the secondary voltage control model of each region are added, and the maximum deviation in the constraint conditions needs to be selected according to the actual situation, which is not conducive to Rapid stabilization of central bus voltage; when adjusting voltage and reactive power, it is easy to cause fluctuations
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[0032] In order to facilitate the understanding of the present invention, the following will be described in conjunction with the accompanying drawings.
[0033] This invention proposes a two-stage voltage control method, please refer to figure 1 , including the steps:
[0034] S101, dividing the grid control area;
[0035] Divide the grid to be controlled into M control areas.
[0036] S102. Obtain an incremental relationship matrix according to the power flow equation;
[0037] According to the power flow equation of the whole network, the incremental relationship matrix between the reactive power injected by the node and the node voltage is obtained
[0038] S103. Obtain a sensitivity coefficient matrix of the central bus voltage in each region relative to the reactive power output of the controlled generator in the region and other regions according to the incremental relationship matrix;
[0039] According to the incremental relationship matrix The sensitivity coe...
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The invention provides a control method for secondary voltage. The control method for the secondary voltage includes the steps of dividing a power grid to be controlled into M control areas; obtaining an increment relation matrix between node injection reactive power and a node voltage according to a load flow equation of the whole grid; obtaining a sensitivity coefficient matrix of a controlled generator reactive power generation of a pivot busbar voltage of each of the areas relative to the area and the other areas; establishing a secondary voltage control model of each of the areas with consideration of reactive power coupling among considering areas; solving alternating iteration of secondary voltage control modules in each area based of the thought of Nash equilibrium to obtain reactive power regulating variable of controlled generators in each area; and performing secondary voltage control according to the reactive power regulating variable of the controlled generators in each area. The invention further provides a device for the secondary voltage, reactive power of tie-line transmission among areas is not needed to be detected, the voltage of a pivot busbar can be stabilized rapidly, and the fluctuation caused by voltage regulation and reactive power can be reduced.
Description
technical field [0001] The invention relates to the field of electric power automatic control, in particular to a secondary voltage control method and device. Background technique [0002] Automatic voltage control (automatic voltage control) refers to the real-time monitoring of reactive power and voltage of the power grid under normal operating conditions, online optimization calculation, hierarchical and regional control of reactive power and related equipment in the power grid, and optimization of reactive power flow distribution. , to achieve the goal of qualified voltage and minimum active power loss of the whole network. Specifically include: primary voltage control (primary voltage control), secondary voltage control (secondary voltage control) and tertiary voltage control (tertiary voltage control). Among them, the primary voltage control uses the automatic voltage regulator to control the closed-loop voltage of the generator terminal near the set value; the second...
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IPC IPC(8): H02J3/16
CPCY02E40/30
Inventor 杨银国刘明波袁康龙温柏坚林舜江李剑辉李力吴国炳辛拓
Owner GUANGDONG POWER GRID POWER DISPATCHING CONTROL CENT