A modeling method and device for an optimal power flow model
A technology of optimal power flow and modeling method, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of many formulas, large losses, and no practical application prospects, etc., and achieve high precision and easy Achieved effect
Inactive Publication Date: 2016-06-15
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology
[0005] 1) The mathematical expression is complicated and there are many formulas;
[0006] 2) There are great technical difficulties in connecting with the mathematical model of the communication system
Since the HVDC system is a power-intensive system, its loss is relatively large, ignoring its loss will lead to a large difference between the calculation result and the actual operation
As a result, the calculation accuracy of the current optimal power flow model cannot meet the actual operation requirements of the current power industry, and it still does not have practical application prospects.
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[0057] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0058] In an embodiment of the present invention, a modeling method of an optimal power flow model is provided. First, the HVDC quasi-steady-state model of the voltage loss and power loss of the converter station including the HVDC system is established; then according to the predetermined high-voltage direct current transmission system Base value, the voltage loss and power loss in the HVDC quasi-steady-state model are processed pe...
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An embodiment of the invention discloses a modeling method and device for an optimal power flow model. The modeling method includes the steps: S11, building an HVDC (high voltage direct current) quasi-steady-state model comprising voltage loss and power loss of a convertor station of an HVDC system; S13, processing per unit values of the voltage loss and the power loss in the HVDC quasi-steady-state model according to a preset reference value of a high voltage direct current transmission system to obtain the HVDC quasi-steady-state model with the processed per unit values; and S15, building the HVDC optimal power flow model according to a power flow equation of the HVDC quasi-steady-state model with the processed per unit values and per unit values of an existing alternating current system. As loss of the HVDC system can be modeled in a detailed manner, the per unit values are conveniently processed, the optimal power flow model can be simply and conveniently linked with a per unit model of the alternating current system, computational accuracy of optimal power flow is improved, and industrial practical requirements are met.
Description
technical field [0001] The invention belongs to the technical field of power system planning and operation scheduling, and in particular relates to a modeling method and device for an optimal power flow model including a high voltage direct current transmission system (High Voltage Direct Current Transmission System, HVDC). Background technique [0002] The optimal power flow of the power system is a large-scale, multi-constrained, nonlinear optimization planning problem. Using the optimal power flow can quantify the reliability and power quality of the power system into corresponding economic indicators, and finally achieve optimal resource allocation and reduce power generation output. It has technical and economic value that cannot be realized by traditional power flow model calculations. [0003] Since my country's primary energy resources are mainly distributed in the west, north, and northwest, while energy consumption centers are concentrated in North China, East Chin...
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IPC IPC(8): G06F19/00
Inventor 郑华谢莉
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)