Simulation configuration method for constant-value parameter of frequency control device in weak interconnection power grid

A technology of frequency control and configuration method, applied in program control device, electrical digital data processing, software simulation/interpretation/simulation, etc., can solve the problems of system frequency oscillation, regional power grid blackout accident, frequency collapse, etc., and achieve good adaptability , Improve the frequency recovery ability, the effect of the plan is reasonable

Active Publication Date: 2013-11-13
STATE GRID CORP OF CHINA +2
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Problems solved by technology

If the control strategy is improper, it will cause system frequency oscillation, and even frequency collapse in severe cases, resulting in large-scale power outages in regional power grids

Method used

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  • Simulation configuration method for constant-value parameter of frequency control device in weak interconnection power grid

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Embodiment Construction

[0043] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0044] Such as figure 1 A method for simulating and configuring a fixed value parameter of a frequency control device in a weakly connected power grid is provided, the method comprising the following steps:

[0045]Step 1: Establish a grid data model;

[0046] Step 2: Establish the fault set of the isolated grid operation mode in the weakly connected power grid;

[0047] Step 3: Simulation and analysis of the action behavior of the frequency control device and the change of the frequency of the isolated grid under severe faults, and judging whether the simulation results meet the corresponding conditions when a serious fault occurs that causes the frequency change of the isolated grid, and if so, consider the configuration scheme of the frequency control device If the effect is good, if it is not satisfied, adjust the fixed value parameters of the frequency...

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Abstract

The invention provides a simulation configuration method for constant-value parameters of frequency control devices in weak interconnection power grids. According to the characteristics that the frequency changes quickly and the amplitude is large after an isolated grid runs due to a reason that the weak interconnection power grids are serially faulted, acting characteristics of frequency control devices such as a primary frequency modulation control device of a steam turbine generator set, a primary frequency modulation control device of a water turbine generator set, a steam turbine overspeed protection control device, a high-frequency generator tripping safety automatic device, a low-frequency load shedding safety automatic device and a low-voltage load shedding safety automatic device are comprehensively considered from two aspects, i.e. isolated grid frequency decrease and increase. A scientific and reasonable simulation configuration method for the constant-value parameters of the frequency control devices in the weak interconnection power grids is made and has the advantages of high applicability, comprehensive considered factors, reasonable scheme and the like.

Description

technical field [0001] The invention belongs to a power system frequency control device, and in particular relates to a simulation configuration method for a fixed value parameter of a frequency control device in a weakly connected power grid. Background technique [0002] The weakly connected power grid itself has a small capacity, and the maximum single-unit capacity accounts for a relatively large proportion of the total power grid capacity. Under accidental accidents such as serious faults in local power grids, natural disasters, or human operation errors, it is easy to separate the power grid tie lines to form an isolated grid operation. At the moment when the isolated grid occurs, there is a certain power difference between the output of all units in the isolated grid and the load power. A large power difference will lead to large fluctuations in the frequency of regional isolated grids. Some control components in the system will adjust or act in response to changes in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06F9/455G06Q50/06
CPCY02T10/82
Inventor 李晓珺张志强吴丽华何嘉勇黎劲松戚江平陈志英赵晓彤李再华张鑫
Owner STATE GRID CORP OF CHINA
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