Transient stability constraint optimal power flow computation method based on EEAC and trace sensitivity

A technology of trajectory sensitivity and optimal power flow, applied in computing, instrumentation, data processing applications, etc., can solve the problems of complex transient stability constraint optimal power flow calculation, difficult convergence, and inaccurate stability criteria.

Active Publication Date: 2015-07-08
HOHAI UNIV
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to aim at the deficiency of the above-mentioned background technology, and provide a transient stability constrained optimal power flow calculation method based on EEAC and trajectory sensitivity, which decomposes the transient stability constrained optimal power flow into transient stability evaluation

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  • Transient stability constraint optimal power flow computation method based on EEAC and trace sensitivity
  • Transient stability constraint optimal power flow computation method based on EEAC and trace sensitivity
  • Transient stability constraint optimal power flow computation method based on EEAC and trace sensitivity

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[0040] The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings. The idea of ​​the present invention is to divide the optimal power flow with transient stability constraints into three sub-problems, including transient stability evaluation problem, sensitivity analysis problem and optimal power flow problem, and solve the three sub-problems iteratively. Such as Figure 4 As shown, follow the steps below:

[0041] Step 1. Based on EEAC, conduct transient stability assessment for each expected fault:

[0042] Step 101, calculate the conventional optimal power flow of the system, that is, calculate the optimal power flow without transient stability constraints, and use it as the initial operating point.

[0043] Establish generator model and load model, calculate transient initial value, and perform transient time domain simulation for each fault. The mathematical model of transient stability calculation is:

[00...

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Abstract

The invention discloses a transient stability constraint optimal power flow computation method based on an EEAC and trace sensitivity, and belongs to the technical field of power system transient analysis. The method comprises the steps that a conventional optimal power flow solution is adopted as an initial operating point to calculate a transient initial value, and an anticipated fault set is set; transient time-domain simulation and EEAC equivalent operation are carried out on all faults in the anticipated fault set, the faults are classified, and the faults meeting the fault stability margin requirement are removed out of the anticipated fault set; the trace sensitivity of the faults not meeting the fault stability margin requirement is calculated, the margin sensitivity of the faults under different types is given, and a transient stability constraint is constructed according to the margin sensitivity of the faults; after the transient stability constraint is embedded in conventional optimal power flow model, an optimal power flow model including the simple transient stability constraint is obtained, the situation that transient stability cannot be quantized when only power angles are adopted as transient stability criterions is avoided, computation complexity is reduced, and the problem of difficult convergence is solved.

Description

technical field [0001] The invention discloses a transient stability constrained optimal power flow calculation method based on EEAC (Extended Equal Area Criterion, extended equal area criterion) and trajectory sensitivity, belonging to the technical field of power system transient analysis. Background technique [0002] With the rapid development of the national economy and the continuous improvement of people's living standards, the power industry has developed rapidly, and new power technologies and measures have been gradually put into use, bringing significant benefits to all aspects of society. However, due to the continuous deepening of the reform of the power system, in order to pursue higher economic benefits, the power grid operators keep the operating point of the power system approaching the boundary of security and stability. The strengthening of the interconnection between regional power grids and the application of new technologies have led to the increasing s...

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/06
Inventor 赵晋泉钱莉
Owner HOHAI UNIV
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