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A method, device, and readable storage medium for online tuning of pss parameters

A parameter and parameter optimization technology, applied in circuit devices, AC network circuits, electrical components, etc., can solve the problems of affecting PSS performance, many test instruments, unsafe power grids, etc., to achieve the effect of improving efficiency and parameter adaptability

Active Publication Date: 2021-08-17
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The test process is time-consuming and labor-intensive. There are many test instruments and most of them are heavy. Most of the test site roads are remote and remote.
On the other hand, the unit is in the grid-connected state during the test, and operations such as disconnecting the wires, applying test noise signals and voltage step signals may also cause unsafe disturbance risks to the power grid
In addition, when the operating conditions change greatly, the adaptability of the parameters obtained by the test method will become worse, thus affecting the performance of the PSS

Method used

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  • A method, device, and readable storage medium for online tuning of pss parameters
  • A method, device, and readable storage medium for online tuning of pss parameters
  • A method, device, and readable storage medium for online tuning of pss parameters

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Embodiment 1

[0047] The first embodiment of the present invention proposes an online tuning method for PSS parameters, such as figure 1 As shown, the method includes:

[0048] Determine the non-compensated phase-frequency characteristics of the excitation system through the pre-built regression relationship model based on the characteristic quantities of the generator operating conditions obtained online;

[0049] Determine the PSS critical gain according to the pre-established PSS critical gain calculation model;

[0050] An optimization model is constructed according to the uncompensated phase-frequency characteristics of the excitation system and the critical gain of the PSS to determine the optimal parameters of the PSS.

[0051] The method of the invention does not need to go to the generator site to carry out tests, and is applicable to application scene requirements such as online automatic calibration and intelligent setting of PSS parameters, and improves the efficiency and param...

Embodiment 2

[0082] The second embodiment of the present invention proposes an implementation case of an online PSS parameter tuning method, based on figure 2 As shown in the dynamic equivalent schematic diagram of the power grid, the method of the present invention comprises the following steps:

[0083] S1. Construct the regression relationship model between the uncompensated phase-frequency characteristics of the excitation system and the operating parameters of the generator, including;

[0084] S11. Constructing a generator equivalent model, and establishing a corresponding loss function model according to the generator equivalent model;

[0085] Specifically, this implementation case is based on figure 2 Establish the dynamic equivalent parameter identification model of the two-machine infinite system, solve and calculate the dynamic equivalent parameter X=[x e1 ,x e2 ,U se2 ,E,P m , T J ,D], respectively: generator to be tuned and equivalent unit branch reactance, infinite b...

Embodiment 3

[0130] The third embodiment of the present invention proposes a PSS parameter online tuning device, said device comprising:

[0131] The data collection module is used to obtain the characteristic quantity of the operating condition of the generator;

[0132] The non-compensated phase-frequency characteristic calculation module of the excitation system is used to determine the non-compensated phase-frequency characteristic of the excitation system through a pre-built regression relationship model according to the characteristic quantity of the generator operating condition;

[0133] The PSS parameter optimization setting calculation module is used to determine the PSS critical gain according to the pre-established PSS critical gain calculation model, and construct an optimization model according to the uncompensated phase-frequency characteristics of the excitation system and the PSS critical gain to determine the PSS optimization parameters.

[0134] Specifically, if Figure...

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Abstract

The invention discloses a PSS parameter online tuning method, device and readable storage medium. The method includes: determining the non-compensated phase-frequency characteristic of an excitation system through a pre-built regression relationship model based on the generator operating condition characteristic quantity acquired online Determine the PSS critical gain according to the PSS critical gain calculation model established in advance; According to the phase-frequency characteristics of the excitation system without compensation and the PSS critical gain, the optimization model is constructed to determine the PSS optimization parameters, and the fault disturbance simulation after the exit and input of the PSS is used for all The above PSS optimization parameters are checked to determine the PSS tuning parameters. The method of the invention does not need to go to the generator site to carry out tests, and is applicable to application scene requirements such as online automatic calibration and intelligent setting of PSS parameters, and improves the efficiency and parameter adaptability of PSS parameter setting work.

Description

technical field [0001] The invention relates to the technical field of network source coordination, in particular to a PSS parameter online setting method, device and readable storage medium. Background technique [0002] The increasing scale of my country's modern power system interconnection and the large-scale application of high-magnification fast excitation systems have increased the risk of low-frequency oscillations in the system, threatening the safe and stable operation of the power system. The large-scale application practice of my country's power industry in the past two decades shows that so far, the Power System Stabilizer (PSS) is still the most economical and mature first choice to improve the system damping level and suppress low-frequency oscillations. [0003] Standards and regulations such as GB / T31464-2015 "Grid Operation Guidelines", "State Grid Corporation's Coordination and Management Regulations on Network Sources" and other standards and regulations:...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 李登峰刘育明杨旼才李小菊司萌夏翰林詹航余霞宫林李昭炯
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST