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Method for automatically selecting on-line strategy and off-line strategy of transient security and stability emergency control of electrical power system

A control strategy and power system technology, applied in electrical components, circuit devices, AC network voltage adjustment and other directions, can solve the problems of large changes in the temporary stability characteristics of the power system, and the online control strategy does not meet the temporary stability requirements, so as to improve reliability. Effect

Active Publication Date: 2012-02-08
NARI TECH CO LTD
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Problems solved by technology

In fact, the operating state of the power system is constantly changing, and the transient stability characteristics of the power system may change greatly within a few minutes, and the online control strategy based on the operating state of the power system several minutes ago may not meet the transient stability requirements.

Method used

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  • Method for automatically selecting on-line strategy and off-line strategy of transient security and stability emergency control of electrical power system
  • Method for automatically selecting on-line strategy and off-line strategy of transient security and stability emergency control of electrical power system
  • Method for automatically selecting on-line strategy and off-line strategy of transient security and stability emergency control of electrical power system

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Embodiment Construction

[0013] Attached below Figure 1-Figure 4 , the method of the present invention is described in detail.

[0014] Figure 1-Figure 4 are 4 independent loop processing processes, figure 1 is the online control strategy calculation process, figure 2 It is an online control strategy verification and distribution process, image 3 It is a verification process for the effectiveness of the online control strategy in the security control device. Figure 4 It is the selection process of the online control strategy and the offline control strategy in the safety control device after the expected failure occurs. about image 3 Two points need to be explained. First, as long as there is an online control strategy in the security control device, even if it is not refreshed, the verification process still needs to be executed cyclically; During the verification process, if it is detected that the new online control strategy has been refreshed into the security control device, the ongo...

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Abstract

The invention belongs to the technical field of electrical power system security and stability control and is suitable for a transient security and stability emergency control system to automatically select an on-line strategy or an off-line strategy. On the basis of a transient security and stability quantitative analysis method, the invention provides the index of influence of running state change on transient security and stability for judging the adaptability of the on-line control strategy to the running state change. The invention comprises the following two parts: (1) issuance of the on-line strategy and confirmation of the effectiveness thereof, i.e. checking the security of the on-line strategy to judge whether issuing the on-line strategy to a control device, and judging the effectiveness of the issued on-line strategy constantly; and (2) selection of the on-line strategy and the off-line strategy during failure, i.e. selecting the on-line strategy when 'form characters' detected by the control device are as same as 'form characters' of the on-line strategy, the time for generating the on-line strategy is not long, and the influence degree of the running state change calculated on the basis of measured data of the control device on the transient security and stability meets the requirement; and otherwise, selecting the off-line strategy.

Description

Technical field [0001] The present invention is the field of power system security and stability control technology. It is suitable for how to automatically select online strategies or offline strategies for temporary and stable control systems. Background technique [0002] With the expansion of the scale of the power system and the change of operating methods, the temporary stability and stability (referred to as the temporary stability) emergency control strategies that are formulated by offline analysis are difficult to achieve optimization and control, and it is difficult to ensure the safety and stability of the power system.The actual operating status of the system is calculated online calculation to calculate the online strategy of temporarily stabilizing emergency control.However, it takes a certain amount of calculation time to determine that the temporary online control strategy requires a certain amount of calculation time. (Usually a few minutes), that is, the onlin...

Claims

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Application Information

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IPC IPC(8): H02J3/12H02J13/00
Inventor 徐泰山方勇杰薛禹胜李碧君鲍颜红罗剑波余文杰汪马翔王胜明郑亮
Owner NARI TECH CO LTD
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