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 lineari

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

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[0053] The implementation scheme will be described in detail below with reference to the drawings.

[0054] Attached figure 1 Shown is a single-machine infinite power system structure diagram, the following will pass figure 1 The system will explain how the design method of the power system stabilizer proposed by the present invention realizes the adaptive function and robustness of the stabilizer.

[0055] 1. The parameters of a single infinite power system are as follows (standard 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] System steady state operating point: 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 synchronous reactance, X′ d Is the direct-axis transient reactance,...

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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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