Quasi-direct current optimal power flow method considering temperature influence

An optimal power flow and quasi-DC technology, which is applied in the direction of DC network circuit devices, calculations, and AC network circuits, etc., can solve problems such as deviation of dispatching operation results, ignoring voltage, and unconsidered reactive power effects, etc.

Inactive Publication Date: 2015-05-06
HOHAI UNIV
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Problems solved by technology

[0005] Purpose of the invention: The technical problem to be solved by the present invention is that the traditional DC optimal power flow has shortcomings such as ignoring the influence of voltage and reactive power

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  • Quasi-direct current optimal power flow method considering temperature influence
  • Quasi-direct current optimal power flow method considering temperature influence
  • Quasi-direct current optimal power flow method considering temperature influence

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Embodiment Construction

[0038] Below in conjunction with specific embodiment, further illustrate the present invention, should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various equivalent forms of the present invention All modifications fall within the scope defined by the appended claims of the present application.

[0039] 1. Quasi-DC model

[0040]In order to obtain the TD-PDCOPF model, firstly, on the basis of the traditional optimal power flow model, a quasi-DC model of the optimal power flow is derived.

[0041] In general, the equation constraint of the optimal power flow is the grid power balance equation, namely

[0042] ΔP i = P si -...

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Abstract

The invention discloses a quasi-direct current optimal power flow method considering temperature influence for an electrical power system. According to the quasi-direct current optimal power flow method considering the temperature influence, an active power balance equation in a traditional direct current model is corrected through the mathematical connections between an active power transmission equation and a reactive power transmission equation of a circuit so as to consider the influences of inactive power and circuit resistance in the model to build a quasi-direct current model of the electrical power system to complement and perfect the direct-current model. According to the electric heating coupling relationship between the circuit temperature and circuit resistance, the circuit temperature influence is considered in the quasi-direct current model of the electrical power system. The quasi-direct current optimal power flow method considering the temperature influence uses a simplified interior point method to solve the quasi-direct current optimal power flow model considering the temperature influence; the computational efficiency of the algorithm can be well guaranteed to meet the online calculation requirements. The simulation result indicates that compared with a traditional direct current optimal power flow, the algorithm is capable of greatly improving the computational precision of the algorithm based on guaranteeing the computational efficiency of the algorithm, and the algorithm is significant for the online dispatching of the electrical power system.

Description

technical field [0001] The invention relates to an optimal power flow method suitable for on-line calculation, in particular to a quasi-direct current optimal power flow method considering the influence of temperature. Background technique [0002] The optimal power flow (OPF) of the power system refers to the stable operation state of the system that achieves the optimal predetermined goal by adjusting the control methods available in the system under certain grid operation and security constraints. The AC OPF model is too complex and the constraints are mostly nonlinear, so the solution efficiency is low, especially in large-scale power systems. In the actual power system, due to the linearization of the traditional direct current optimal power flow (DCOPF) model, which is easy to solve and has the ability of fast calculation, it is often used as an online calculation tool for OPF. However, a large number of simplified approximations lead to the complete neglect of the in...

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Application Information

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IPC IPC(8): H02J3/00G06F19/00
CPCH02J1/00
Inventor 卫志农高沁孙国强孙永辉向育鹏何天雨李海欣
Owner HOHAI UNIV
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