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A method and system for reliably issuing short-circuit current control measures

A technology of control measures and short-circuit current, which is applied in the direction of electrical components, emergency protection circuit devices, etc., can solve problems such as grid short-circuit current and aggravation, improve safety and economic operation level, reduce pressure, and improve dispatching automation level Effect

Active Publication Date: 2022-06-24
CHINA SOUTHERN POWER GRID COMPANY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the state of the power grid changes dynamically with time, the calculation of short-circuit current and auxiliary decision-making takes a certain amount of time. If the state of the power grid changes significantly during this period of time, the measures generated based on the old state calculation will be applied to the new state. The power grid is obviously not suitable, not only cannot solve the short-circuit current problem of the power grid, but may aggravate the problem

Method used

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  • A method and system for reliably issuing short-circuit current control measures

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Effect test

Embodiment 1

[0059] Example 1: as figure 1 As shown, the present invention provides a method for reliably issuing short-circuit current control measures, which includes the following steps.

[0060] 1) For the initial power grid, obtain the control measures: SET(t 0 )={remove unit A, remove unit B, remove load A}. Get the current grid characteristics as unit 1, unit 2, unit 3, unit 4, unit 5, line 1, line 2, line 3, line 4, line 5, transformer 1, transformer 2, transformer 3, transformer 4, transformer 5, Load 1, Load 2, Load 3, Load 4, Load 5. The line specifies the power measurement point, and the transformer takes the power of the high-voltage side. The state feature vector is the set of all feature equipment on / off states, and the power feature vector is the set of active power values ​​of all feature devices. Set the allowable error distance threshold ε=20, and the influence factor of each key equipment is 1.

[0061] 2) Set the operating time of the power system when the power g...

Embodiment 2

[0087] Embodiment 2: Other conditions are the same as those of Embodiment 1, and the allowable error distance threshold value ε=10 is set.

[0088] At this time, if the distance between the power eigenvector at the time of delivery and the initial power eigenvector does not meet the allowable error requirement, it returns a delivery failure in step 3) and does not execute step 4).

Embodiment 3

[0089] Embodiment 3: The present invention also proposes a reliable delivery system for short-circuit current control measures, including:

[0090] The measure acquisition module is used to execute: set the power system running time when the grid short-circuit current analysis is started as t 0 , get for the t 0 Short-circuit current control measures for grid conditions at all times;

[0091] Eigenvector generation module to perform: for t 0 The power grid operating conditions at all times, and the state feature vector S is generated according to the switch-on and stop state of key equipment. 0 , the power characteristic vector F is generated according to the power of the key equipment 0 ;

[0092] Vector consistency discrimination module, used to execute: at delivery time t 1 , obtain the operating conditions of the power grid, and generate the state feature vector S at the time of delivery 1 and the power eigenvector F 1 , compare the consistency between the state eig...

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Abstract

The invention discloses a method and system for reliably issuing short-circuit current control measures. The method includes the following steps: obtaining 0 The short-circuit current control measures of the grid working conditions at all times; for t 0 According to the operating conditions of the power grid at all times, the state eigenvector S is generated according to the switching and stopping status of key equipment 0 , generate a power eigenvector F according to the power of key equipment 0 ; at the sending time t 1 , to generate the state feature vector S at the time of delivery 1 and power eigenvector F 1 , compare the consistency of the state eigenvector and the initial state eigenvector at the time of delivery; read the equipment start-up and shutdown status corresponding to the measure in SCADA before the control measure is delivered; the initial state of the control measure is not delivered, and the control measure is delivered through the delivery interface Measures, judge the return status; for the control measures that have been successfully delivered, read the equipment shutdown status in SCADA to confirm whether the corresponding equipment is out of service; if the status of all control measures is normal or abnormal, end this control measure Issued.

Description

technical field [0001] The invention relates to a method and system for reliably issuing short-circuit current control measures, belonging to the technical field of power systems and automation thereof. Background technique [0002] For power grid dispatching operation, in order to ensure the safe and stable operation of the power grid, it is necessary to pay close attention to the short-circuit current level of the power grid, and timely discover and grasp the risk of excessive short-circuit current of the power grid. Reduce the short-circuit current level of the grid. However, at present, power grid operators usually check the short-circuit current of each point according to the operation mode arranged offline and according to the principle of maximum short-circuit current calculation. Because the calculation method cannot exhaust all the operation modes, it is impossible to ensure that the power grid will not operate in the scheduled operation mode. The short-circuit cur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/26
CPCH02H7/26
Inventor 黄磊邵伟徐光虎徐健李鹏杨君军张建新鲍颜红邱建顾健辉邓韦斯徐雄峰谢丹丹陈俊楠周瑞
Owner CHINA SOUTHERN POWER GRID COMPANY
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