A method for nest power analysis and on-grid power dynamic adjustment in hydropower-rich areas
An electrical analysis, regional technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve the problems of electric power, complex terrain and weak structure in the western region, and achieve the effect of balanced benefits.
Active Publication Date: 2017-01-25
DALIAN UNIV OF TECH
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However, with the in-depth implementation of the country and government's low-carbon economic development model, industrial organization adjustment, and energy strategic development planning, the growth rate of electricity load in the western region is slow, and the growth of power supply and load growth will be further out of balance. Consumption, which needs to be consumed through large-scale and long-distance delivery
However, at the beginning of the construction of the domestic power grid grid structure, the current situation of a large number of centralized power sources being connected to the grid was not considered. The current structure is generally weak. In addition, the terrain in the western region is complex, there are many protected areas, and the ecology is fragile. The channel resources for the construction of transmission lines are very limited. , and the amount of incoming water in the southwestern region during the flood season is large and concentrated, and large-scale small hydropower and large and medium-sized hydropower are synchronized
At this time, a large number of power sources are connected to the grid, and large-scale small hydropower and large and medium-sized hydropower occupy a limited number of transmission channels, resulting in the grid power in some weak sections exceeding their limit transmission capacity, failing to pass the security check of the section, and threatening the safe and stable operation of the power grid. Serious power generation and water abandonment
[0004] The results of the present invention look forward to the future development of the power grid. At present, most of the relevant domestic research results and literature reports are aimed at the optimal dispatching of cascade hydropower stations and the production of large-scale small hydropower generation plans. Coordination of on-grid electricity in the case of nested electricity due to grid grid restrictions
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[0021] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions.
[0022] Most of the traditional optimal scheduling of hydropower considers the constraints of power stations and hydraulics, but does not consider the impact of the grid structure on optimal scheduling of hydropower. Most of the generated power generation plans cannot pass the grid safety check, which will pose a threat to the safe and stable operation of the grid. The power generation plan cannot be put into production operation directly. The present invention establishes a power grid analysis model based on graph theory, and abstracts the power grid grid into a directed graph with attributes for nodes and lines, see figure 2 , and take the large, medium and small hydropower generation plan as the initial on-grid electricity, and input it into the model together with the regional consumption load, and use ...
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The invention relates to the fields of power system planning and reservoir regulation, and discloses a method for poor power transmission ability analysis and on-grid energy dynamic regulation in hydropower-enriched regions. According to the method, power grid frame analysis is incorporated to reservoir regulation, and a weak link of a power grid frame is analyzed according to different time scales; the on-grid energy under a poor power transmission ability fault surface is reasonably regulated on the premise that safe and reliable operation of a power grid is guaranteed. The method adopts the technical scheme that by establishing a poor power transmission ability analysis model based on a graph theory, predicted small hydropower generating capacity and the output, obtained through optimal computation, of large and medium hydropower station are input into the model, so that poor power transmission ability analysis is performed, the poor power transmission ability fault surface, namely the weak link, of the current power grid frame is determined; the on-grid energy under the poor power transmission ability fault surface is regulated through a method of multistage fault surface approaching equal blocked ratio. The method has the benefits that the future development of the power grid is prospected, effective suggestions are provided for the future power grid frame construction, balances benefits of all power generation enterprises, and has important demonstration significance for the reservoir regulation operation and power system operation management.
Description
technical field [0001] The invention relates to the fields of power grid planning and reservoir dispatching operation, in particular to a dynamic adjustment method for nest power analysis and grid-connected power in areas rich in hydropower. [0002] technical background [0003] Hydropower is an important renewable energy source. The development and utilization of abundant hydropower resources is of great significance to increase the proportion of clean energy utilization, improve the energy structure, ensure national energy security, meet the demand for power growth, reduce greenhouse gas emissions, and protect the environment. my country is rich in hydropower resources, mainly concentrated in the western region. By the end of 2010, the scale of hydropower construction in Southwest China was about 45 million kW, accounting for about 85% of the scale of hydropower under construction nationwide. The exploitable capacity of small hydropower in Southwest China is 79.529 million...
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IPC IPC(8): H02J3/46G06Q10/06G06Q50/06
CPCH02J3/003H02J3/382H02J2203/20Y02P90/82Y04S10/50
Inventor李刚陈孚程春田李秀峰蔡华祥
OwnerDALIAN UNIV OF TECH