Power grid security constraint-considered spinning reserve and electric energy joint optimization clearing method

Abstract

The invention relates to the technical field of power dispatching, in particular to a power grid security constraint-considered spinning reserve and electric energy joint optimization clearing method.The method comprises the following specific steps: (1) building an optimization target model: building the optimization model by taking the lowest electricity purchasing cost as an optimization target; (2) introducing a limit characteristic constraint condition of power grid security constraint; (3) introducing a power system operation constraint condition; (4) introducing an alternative characteristic constraint condition of the self power generating capacity of a power generator set; and (5) solving the optimization model built in the step (1) under the three constraint conditions in the steps (2) to (4). On the basis of the conventional electric energy and spinning reserve joint optimization clearing, the method further considers the influence on the power grid security constraint during dispatching of the spinning reserve of the power generator set in an execution process, so that section pre-control adaptation is realized, the security of spinning reserve arrangement is improved,and the actual feasibility of the spinning reserve is guaranteed.

Description

technical field [0001] The invention relates to the technical field of electric power dispatching, in particular to a combined optimization clearing method of spinning reserve and electric energy in consideration of grid safety constraints. Background technique [0002] Spinning reserve and electric energy are two important trading varieties in the electricity spot market. The spinning reserve and power service coupling characteristics provided by the generator set are remarkable, which are mainly reflected in two aspects: [0003] (1) Alternative characteristics of self-generating capacity. Restricted by its own power generation capacity, the rotating reserve and electric energy provided by the generator set cannot overlap, that is, when a certain installed generating capacity is used to provide electric energy services, this part of the installed generating capacity cannot be used to provide rotating reserve capacity; the same When providing spinning reserve service, pow...

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Problems solved by technology

[0004] (2) Restrictive characteristics of power grid security constraints

[0007] (1) Dispatch and operation personnel timely discover the problem that the calling of spinning reserve may lead to cross-section limit, and control it in time to change the transaction result and call the reserve capacity of other generating units, which will lead to a decline in operating economy;

[0008] (2) Dispatch operators fail to discover potential cross-section limit problems in time, and still call according to the original rotating reserve clearing plan, which will lead to cross-section limit violations and, in severe cases, lead to power grid safety accidents

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