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Input signal equivalent based accelerating power type PSS (packet switching service) parameter tuning method

A technology of input signal and acceleration power, which is applied in the field of acceleration power type PSS parameter setting, can solve difficult problems such as phase lag of generator excitation control system

Active Publication Date: 2012-08-15
ELECTRIC POWER SCHEDULING CONTROL CENT OF GUIZHOU POWER GRID CO LTD +2
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  • Claims
  • Application Information

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Problems solved by technology

After checking multiple PSS parameters in the actual power grid, it is found that the set PSS parameters are sometimes difficult to effectively compensate for the phase lag of the generator excitation control system

Method used

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  • Input signal equivalent based accelerating power type PSS (packet switching service) parameter tuning method
  • Input signal equivalent based accelerating power type PSS (packet switching service) parameter tuning method
  • Input signal equivalent based accelerating power type PSS (packet switching service) parameter tuning method

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Embodiment Construction

[0049] to attach Figure 4 An actual power grid as shown is taken as an example to verify the effectiveness of the method. From attached Figure 4 It can be seen that the power plant G1 and the power plant G2 are each connected to the bus1 node of the main network through a return line. The small disturbance analysis results show that there is a local negative damping oscillation mode of the G1 power plant unit relative to the G2 power plant unit in the power grid; and the participation factor of the G1 power plant unit participating in this oscillation mode is relatively large, that is, the configuration of PSS in the G1 power plant unit has a great effect on suppressing the oscillation mode The effect is better.

[0050] attached by Figure 5 The phase-frequency characteristic curve (solid line in the figure) between the input signal of the excitation control system and the electromagnetic torque of the unit in the G1 power plant shown when the PSS is not turned on shows ...

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Abstract

The invention discloses an input signal equivalent based accelerating power type PSS (packet switching service) parameter tuning method, which belongs to the field of stability control on power systems. The method comprises the following steps: on the premise of obtaining phase-frequency characteristics between input signals and electromagnetic torques of an excitation control system of a generator set desired to be configured a PSS, firstly, calculating and tuning parameters of a lead-lag link which double input signals jointly pass; then, tuning parameters of each link which a delta Omega signal individually passes; and finally, equating a delta Pe signal into an input signal with a phase same as that of the delta Omega signal, and tuning parameters of each link which the signal individually passes. The method disclosed by the invention is mainly used for enhancing the damping of a system, inhibiting the low-frequency oscillation, and improving the small disturbance stability and dynamic stability of the system.

Description

technical field [0001] The invention belongs to the field of power system stability control. More precisely, the invention relates to an acceleration power type PSS parameter setting method based on the equivalent value of an input signal. Background technique [0002] In modern power systems, under the conditions of heavy load and long-distance power transmission, if the generator adopts a modern fast, high peak value multiple excitation control system, it is easy to produce negative damping effect, resulting in a decrease in the stability of small disturbances and dynamic stability of the system , and even cause low-frequency oscillations. [0003] As an additional auxiliary link of the generator excitation control system, PSS generates a damping torque coaxial with the generator speed deviation signal by using the generator speed deviation signal, frequency deviation signal or electromagnetic power deviation signal as an additional feedback control of the excitation contr...

Claims

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Application Information

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IPC IPC(8): H02J3/24
Inventor 方勇杰侯玉强李威孙斌马覃峰胡剑琛刑涛
Owner ELECTRIC POWER SCHEDULING CONTROL CENT OF GUIZHOU POWER GRID CO LTD
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