Modeling and optimized dispatching method of electrical series-parallel system on the basis of energy center

Abstract

The invention discloses a modeling and optimized dispatching method of an electrical series-parallel system on the basis of an energy center. The modeling and optimized dispatching method comprises the following steps: firstly, establishing an electrical network, a natural gas network and an energy hub model, and coupling the electrical network with the natural gas network through an energy hub to form the electrical series-parallel system; then, taking total energy cost as a target function, and considering various constraint conditions to establish an optimized dispatching mathematic model of the electrical series-parallel system; and carrying out solving by a primal-dual interior-point method, importing a slack variable and a barrier parameter in sequence in a solving process so as to change the model into a model which only contains an equality constraint, then, importing a Lagrange multiplier to obtain a Lagrange function, and solving a non-linear equation set formed by a KKT (Karush-Kuhn-Tucker) condition of the Lagrange function by a Newton method. A constructed example simulation result indicates that an optimization effect on the electrical series-parallel system by the modeling and optimized dispatching method is superior to an independent optimization effect.

Description

technical field [0001] The invention relates to an energy center-based electrical hybrid system modeling and optimal scheduling method, belonging to the field of multi-energy comprehensive control and utilization. technical background [0002] The widespread use of fossil energy has led to increasingly prominent environmental problems and the gradual depletion of fossil energy. The traditional economic and social development model is unsustainable. It is urgent to establish a more efficient, environmentally friendly and sustainable energy utilization model. The energy hub (energyhub, EH) It is proposed to make it possible to establish a new energy utilization model. An energy center is defined as a virtual entity composed of energy conversion equipment and energy storage equipment that can realize mutual conversion and storage of various energy sources. As the intermediary of various energy forms, the energy center promotes the closer connection between various energy forms...

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Problems solved by technology

[0004] Predecessors have enough research on the independent network of power network and natural gas network, such as classic problems such as optimal power flow (OPF), but rarely consider the comprehensive optimal dispatching problem of power network and natural gas network

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