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Low-frequency deloading parameter online checking method of self-adaptation power grid operation mode

A low-frequency load shedding and power grid operation technology, applied in the direction of power network operating system integration, electrical components, circuit devices, etc., can solve the hidden dangers of power grid safe and stable operation, it is difficult to fully reflect the adaptability of low-frequency load shedding parameters, and achieve accuracy and reliability-enhancing effects

Active Publication Date: 2012-08-01
NARI TECH CO LTD
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Problems solved by technology

The actual operation shows that the above calibration method is difficult to fully reflect the adaptability of the low-frequency load shedding parameters to the power grid operation mode, thus bringing hidden dangers to the safe and stable operation of the power grid

Method used

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  • Low-frequency deloading parameter online checking method of self-adaptation power grid operation mode
  • Low-frequency deloading parameter online checking method of self-adaptation power grid operation mode

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Embodiment Construction

[0020] Attached below figure 1 , the method of the present invention is described in detail.

[0021] figure 1 Step 1 in the description is to analyze and determine the subnets that may be decomposed into isolated networks. The main points of the analysis method are: according to the real-time topology information of the power grid, the cut-set analysis of the transmission section is carried out. If the connection lines between the local power grid and other parts of the power grid are relatively small, for example, the number of tie lines is less than 4, it can be regarded as a possible independent operation Candidate subnetworks; for candidate subnetworks with a relatively small number of nodes, such as less than 5, merge them into adjacent power grids to reduce the number of candidate subnetworks; then delete subnetworks that only have power or only loads from the candidate subnetworks .

[0022] figure 1 Step 2 describes the screening of candidate subnets generated in ...

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Abstract

The invention belongs to the technical field of power system computation and analysis. The method is mainly characterized by comprising the following steps: 1) confirming subnets of checking, analysis and computation of low-frequency deloading parameters according to the power grid real-time operation mode information by combining the configuration and start and stoppage situation of a low-frequency deloading device, and automatically generating a forecast failure collection for the checking, analysis and computation for the low-frequency deloading parameters; 2) computing the low-frequency deloading parameters of each subnet online according to the actual situation of the low-frequency deloading control load; 3) generating a tidal current for low-frequency deloading checking, analysis and computation online according to the power grid real-time operation mode, and carrying out time and domain simulation for different expected stoppage and subnets by adopting the differentiated low-frequency deloading parameters consistent with the actual situation; and 4) analyzing and computing the frequency safety margin based on time and domain simulation, and taking the requirement met by the frequency safety margin as the basis for evaluating that the low-frequency deloading parameters adapt to the current operation mode.

Description

technical field [0001] The invention belongs to the technical field of power system calculation and analysis. Background technique [0002] Low-frequency load shedding belongs to the category of the third line of defense for power system security and stability. The action of low-frequency load shedding is closely related to parameter setting, power grid operation mode and fault form. The adaptability of low-frequency load shedding parameters is the key to its effective function. In order to check the adaptability of the low-frequency load shedding parameters, it is necessary to simulate the characteristics of the grid fault and analyze the safety and stability of the power grid under the condition of taking into account the characteristics of the low-frequency load shedding action. [0003] The parameter setting of low-frequency load shedding determines the frequency starting value of each area and each round of load shedding and the proportion of each round of load shedding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/14
CPCY02B70/3225Y04S20/222
Inventor 李碧君徐泰山余文杰刘韶峰王昊昊徐伟曾兴嘉谢传治
Owner NARI TECH CO LTD
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