Electric power system optimal power flow method based on hyperplane form safety field periphery
A technology of power system and power flow method, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve the problems that the physical meaning of the expression is not clear enough intuitively, it is not convenient to take into account the expected accident set, and the research of safety electricity price, etc.
Inactive Publication Date: 2013-04-17
TIANJIN UNIV
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However, the expression of the objective function and constraints in literature [8] uses the branch angle as the optimization variable, which is not only inconvenient to take into account the expected accident set, but also makes the physical meaning of the expression not intuitively clear. Research
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[0032] The following describes the present invention in detail with reference to the drawings and embodiments. The process of the present invention is as follows: figure 1 Shown.
[0033] The first step: collect the required data from the EMS, and determine the expected accident set;
[0034] Taking the IEEE39 node system as an example, the node system structure is as follows figure 2 Shown. For this embodiment, the data of the IEEE39 node system can be directly input. For the actual power system, it is necessary to connect the energy management system in the power grid control center, that is, the EMS system to obtain necessary data. In this embodiment, the expected accident set contains 6 expected accidents, which are lines 4-14, 5-6, 16-21, 17-18, 23-24 and 26-29 at the sending end (4, 5, 16, 17, 23, 26 bus side) a three-phase short-circuit ground fault occurs, and the fault line is cleared after the fault lasts for 0.1 seconds. Each predicted accident system has a critical c...
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The invention discloses a power system optimization tide and a realtime pricing method based on the hyperplane form security domain boundary, using the quiescent voltage security domain in the cutset power space and the utility dynamic security domain in the injection power space to respectively show the quiescent voltage stabilization restriction and the transient stabilization restriction, further defining the complex security constraint set including the static state security constraint, the static state voltage security constraint and the transient security constraint. All the variables in the objective function and the constraint expression are the schedulable values injected into the power system of the power space before the accident, different expected accidents in the expected accident set are reflected in the coefficient change of the restriction expression. In the solving method, a processing method performing the decoupling optimization-iteration to the wattful and the wattless production cost is adopted, to obtain the wattful electricity price and the wattless electricity price and the component electricity price related to the different constraint, wherein the obtained component electricity price reflects that the power injection at different nodes corresponds to the effect of the restriction, thereby using the realtime electricity price to inspirit the market participants to actively maintain the system safety.
Description
Technical field [0001] The present invention relates to the technical field of electric power dispatching and electric power market of electric power system, in particular to a method for optimizing power flow of electric power system. Background technique [0002] In an open power market environment, reasonable and effective power prices are essential to ensure the safe and economic operation of the power system. Real-time electricity price theory was first applied to active power pricing. The Lagrangian multiplier corresponding to the active power balance constraint is the real-time power price when optimizing power flow convergence. This method generally takes the minimum production cost or the maximum social benefit as the objective function. In the traditional power industry, since the power generation, transmission, and distribution links belong to the same power company, reactive power allocation and dispatching decisions are often determined by centralized optimization me...
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IPC IPC(8): G06Q10/04G06Q50/06H02J3/00
Inventor 余贻鑫王艳君
Owner TIANJIN UNIV