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Plug-and-play power system stabilizer design algorithm

A stable, plug-and-play technology for power systems, applied in circuit devices, AC network circuits, reducing/preventing power oscillations, etc., can solve the problems of difficulty, inconvenience, and large amount of calculation in the extraction of target oscillation modes

Inactive Publication Date: 2016-10-12
JIANGSU ELECTRIC POWER CO +3
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Problems solved by technology

The traditional eigenvalue analysis method to design the power system stabilizer is to establish the whole system model and then linearize it, and then design the stabilizer on the basis of the whole system linearized model. This traditional design algorithm is very useful in the actual large-scale power system. Inconvenient, large amount of calculation, high matrix dimension, difficult to extract the target oscillation mode

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  • Plug-and-play power system stabilizer design algorithm
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  • Plug-and-play power system stabilizer design algorithm

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Embodiment Construction

[0053] The implementation will be described in detail below in conjunction with the accompanying drawings.

[0054] attached figure 1 Shown is the structure diagram of a stand-alone infinite power system, the following will pass figure 1 The system is used to illustrate how the design method of the power system stabilizer proposed by the present invention can realize the adaptive function and robustness of the stabilizer.

[0055] 1. The parameters of the single-unit infinite power system are as follows (per unit value):

[0056] Generator parameters: X d =0.8,X q =0.4,X' d =0.05, M=8, D=0, T' d0 =5.0s

[0057] Automatic voltage regulator parameters: K A =10, T A =0.01s

[0058] Transformer parameters: X t =0.2

[0059] Transmission line parameters: X l =0.3

[0060] Steady-state operating point of the system: P t0 =0.5,V t0 =1.05,V s0 =1.0229, θ s0 =0.1472, V b0 =1.0

[0061] where X d is the direct axis synchronous reactance, X q is the quadrature axis s...

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Abstract

The invention belongs to the technical field of power system control and particularly relates to a plug-and-play power system stabilizer design algorithm. The plug-and-play power system stabilizer design algorithm comprises the steps of: building a local model by employing voltage of a high voltage side bus of a transformer at an outlet of a generator, carrying out linearization on equation sets of the model and then substituting the equation sets into a differential equation set and arranging the equation set into a matrix form; solving steady-state initial values of other variables according to system parameters and given variable initial values under a steady-state operating point; calculating an open-loop electromechanical oscillation mode as shown in the specification; designing the power system stabilizer by a phase compensation method; arranging the designed stabilizer on the generator for simulation verification; and changing the system operating state, namely changing output power of the generator, collecting a local signal again through an automatic collection device, designing stabilizer parameters after the operating state changes and carrying out simulation verification, thereby achieving the plug-and-play function and the robustness of the stabilizer under different operating states of the system.

Description

technical field [0001] The invention belongs to the technical field of power system control, and in particular relates to a design algorithm of a plug-and-play power system stabilizer. Background technique [0002] With the interconnection of regional power grids, system low-frequency oscillation has become an important issue that needs to be considered in power system operation and planning. In the power system, when the generators are connected and run in parallel through the transmission line, the relative swing between the rotors of the generator (or generator group) will occur under the disturbance, and will cause continuous oscillation when there is no damping. At this time, the transmission power on the transmission line will also oscillate accordingly. Because its oscillation frequency is very low, generally 0.2-2.5Hz, it is called low-frequency oscillation. [0003] The application of power system stabilizer (PSS) has achieved obvious effect in suppressing low fre...

Claims

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Application Information

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IPC IPC(8): H02J3/24
CPCH02J3/24H02J2203/20
Inventor 杜文娟窦飞蔡晖张建鹏
Owner JIANGSU ELECTRIC POWER CO
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