Research Of Model On Short-term Optimization Scheduling Among Cascaded Hydroelectricity Plants And Choice Of Making Pricing Schemes

With the development of innovation on electricity market, the traditional short-term optimization scheduling modes about loading and resource among cascaded hydroelectricity plants have not satisfied the demand of the generation enterprises. Thus, it is necessary for the generation enterprises to redesign the short-term optimization scheduling system according to the market rules and to discuss the problem of the choice of making-pricing schemes on"one price of one plant"and"one price of all plants"among the cascaded hydroelectricity plants from the short-term optimization scheduling degree.And all of these are both able to save a great deal resource for the country and bring enormous economic benefit for generation enterprises, and have the very widest application future. Some researchers have done more work in modeling and solving on the traditional short-term optimization scheduling, more considering in assigning the resources optimally. However it is less discussed to the model on the short-term optimization scheduling among cascaded hydroelectricity plants under market environment, much less to the choice of making pricing schemes on"one price of one plant"and"one price of all plants". Thus, this paper analyzes and discusses on the two problems. The content includes:Firstly, this paper builds the short-term optimization scheduling model among cascaded hydroelectricity plants under market environment.The characteristics, classify, joint relations and other basic parameters about cascaded hydroelectricity plants are firstly given in this paper.And secondly many traditional optimal rules are also commented.And then this paper brings forward a new optimal rule about maximizing the benefits of the generation enterprises in the considered aggregate among cascaded hydroelectricity plants,this rule includes the benefit of generating electricity and sluice.In the end, the corresponding limit conditions are given,and three characteristic parameters are discussed such as the time lag of the current, the relation of generating electricity quantity and generating electricity citation flux, the benefit coefficient of sluice.Secondly, this paper designs a new Dynamic and Adaptive Ant Colony Optimization (DAACO) to solve the above model. Basing on the self-defective of the traditional ant colony algorithm and the existing problems of this algorithm to solve the above model,this paper designs a new Dynamic and Adaptive Ant Colony Optimization (DAACO), this algorithm is improved from four aspects such as dynamically adjusting the volatilization coefficient of information element, self–adaptively updating the whole information element, the updating manner of the whole information element and the state transfer parameter.In the end, this paper builds the frame to solve the above model by DAACO basing on the characteristic of the model,and discusses the three key problems such as the disposal of the limit conditions, the illumination mechanism and the generating and updating of the eliting area.Then, this paper discusses the short-term optimization scheduling model among cascaded hydroelectricity plants based on different price models.At the different development phase of power market, there are the different price patterns, this paper firstly illustrates the structure and shortcoming of different price patterns detailedly, such as one-part price, two-part price and competition price.And then this paper also builds the unite pattern of the different price patterns.In the end, this paper builds the short-term optimization scheduling model among cascaded hydroelectricity plants under the unite price pattern basing on maximizing the benefits of the generation enterprises,and theoretically analyzes the optimal rules of different price patterns on the unite model.In the end,this paper validates the model and algorithm by the correlative data of the cascaded hydroelectricity plants of LanCangJiang,and discusses the problem of the choice of making-pricing schemes on"one price of one plant"and"one price of all plants"among the cascaded hydroelectricity plants from the short-term optimization scheduling degree.Thus, this paper firstly chooses the short-term optimization scheduling model of zonal time price and"one price of all plants"as the validated objects, and validates that the model built is reasonable;This paper secondly solves the above model by ACS and DAACO algorithms partly, and it is gained that the algorithms designed in this paper is effective; In the end,this paper contrasts and analyzes the"one plant of one plant"and"one price of all plants"among cascaded hydroelectricity plants on one-part price and zonal time price partly, it is educed that the price mechanism of"one price of all plants"among cascaded hydroelectricity plants is much better than"one plant of one plant", and it has more advantages on the distribution and using of resource in reason.