Interval power flow calculation method considering sensitivity classification and correlation
A technology of interval power flow and calculation method, applied in the field of power system, can solve the problems of reducing optimization times and excessive calculation amount
Active Publication Date: 2020-12-08
FUZHOU UNIVERSITY
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[0005] In view of this, the object of the present invention is to provide an interval power flow calculation method that considers sensitivity classification and correlation, uses a parallelogram model to represent the correlation between variables, and solves the problem that the calculation amount of the scene optimization method is too large, by comparing the node voltage For the positive and negative of the sensitivity of the node power, the state variables with the same changing trend are classified and calculated, the number of optimizations is reduced, and the accurate power flow range is obtained more efficiently
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[0082] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0083] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
[0084] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...
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The invention relates to an interval power flow calculation method considering sensitivity classification and correlation. The method comprises the following steps: S1, acquiring power system parameters and interval variable parameters; S2, constructing a parallelogram model; S3, calculating a deterministic power flow result, and calculating an inverse matrix of a jacobian matrix of a power flow equation according to the result to obtain a sensitivity matrix of node voltage to node injection power; S4, classifying the state variables with consistent change trends by comparing the positive andnegative properties of each row of elements of the sensitivity matrix to obtain a classification number K; S5, taking the sum of the classified kth type of state variables as an objective function, considering constraints, establishing a maximization and minimization nonlinear optimization model of the interval power flow, and solving the model; S6, if k is smaller than K, k is made to be equal tok + 1, and the step S5 is executed again; and if k is greater than or equal to K, sorting the obtained interval ranges of the voltage amplitudes and the phase angles of the nodes, and outputting an interval power flow result. According to the invention, an accurate tide interval can be obtained more efficiently.
Description
technical field [0001] The invention relates to the technical field of power systems, in particular to an interval power flow calculation method considering sensitivity classification and correlation. Background technique [0002] With the emergence of problems such as energy depletion and environmental degradation, renewable energy power generation represented by wind power has been vigorously developed. Renewable energy output is greatly affected by climate and environmental factors, and has strong randomness and volatility, which brings uncertainty to the operating state of the power system. Therefore, it is necessary to calculate the uncertain power flow of the power system. [0003] Interval power flow is a power flow calculation method that obtains upper and lower bounds of power flow variables through known upper and lower bounds of uncertain quantities. The power flow calculation based on the interval analysis method has conservative problems, and the obtained resul...
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Login to View More IPC IPC(8): H02J3/00H02J3/06H02J3/46H02J3/48G06F30/20G06K9/62G06F17/11G06F17/16G06F111/04
CPCH02J3/00H02J3/06H02J3/466H02J3/48G06F30/20G06F17/11G06F17/16H02J2203/10H02J2203/20H02J2300/28H02J2300/40G06F2111/04G06F18/24Y04S10/50
Inventor 江岳文陈宇辛
Owner FUZHOU UNIVERSITY