Method for collaboratively operating internal power supplies and external power supplies of power grid with large-scale power input from external regions

A technology of incoming electricity and operating methods from outside the area, applied in the field of power systems, can solve problems such as inestimable influence on the power grid, and achieve the effect of improving the coordination of network sources

Active Publication Date: 2016-07-13
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It effectively solves the problem that the randomness of incoming calls outside the area ha

Method used

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  • Method for collaboratively operating internal power supplies and external power supplies of power grid with large-scale power input from external regions
  • Method for collaboratively operating internal power supplies and external power supplies of power grid with large-scale power input from external regions
  • Method for collaboratively operating internal power supplies and external power supplies of power grid with large-scale power input from external regions

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Embodiment 1

[0103] Taking Suzhou Southern Power Grid as an example for simulation calculation, the system network topology is as follows figure 2As shown, the southern Suzhou power grid mainly includes Suzhou urban area and Wujiang area, and receives electricity mainly through three 500kV transmission channels: Meili-Mudu, Huaneng Taicang-Chefang and Shipai-Yushan-Chefang. It is expected that the 1000kV UHV Huaihu northern semi-ring Taizhou-Suzhou river crossing channel will be completed in 2020, and the power receiving capacity in southern Jiangsu will be further improved by then. In summer, when hydropower is generated at the sending end, when the Suzhou converter station is fully fed with DC, the voltage reduction at the Suzhou UHV station is relatively light. In winter, during the dry season of hydropower at the sending end, the DC of the Suzhou converter station is in the small mode of power transmission (in extreme cases, the power transmission is only 10% of the large mode), and t...

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Abstract

The invention discloses a method for collaboratively operating internal power supplies and external power supplies of a power grid with a large-scale power input from external regions. The method comprise steps of: predicting a maximum load, determining a minimum load in combination with a minimum daily load factor, and determining a peak-valley difference; determining a spinning reserve capacity according to a ratio of a load reserve to an accident reserve, and calculating a peak regulation capacity required by a system in combination with the peak-valley difference; calculating a peak regulation capacity surplus condition according to the peak regulation capacity required by the system and a peak regulation capacity provided by the system; determining the peak regulation capacity provided by the system according to the peak regulation capability and the minimum technical output power of each power supply in a current region; determining the minimum provided peak regulation capacity and installed capacity of a thermal power generating unit in the region according to a peak regulation capability balance requirement; and according to a reasonable percentage reserve, inversely deriving an agreed distribution capacity by the installed capacity of the thermal power generating unit under a maximum generation load. The method takes account of peak regulation balance, reduces the influence of uncertainty of input power from external regions on the power supplies in the region on the basis of reasonability of the installed capacities of the power supplies and the power structure in the region so as to increase the utilization time of the thermal power generating unit in the region.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and in particular relates to a method for coordinating operation of internal and external power sources of a power grid under large-scale incoming power from outside the area. Background technique [0002] After the large increase in power received outside the region, most of the power received outside the region is transmitted through long-distance, high-power UHV DC or AC grids, and the maximum transmission power of a single transmission channel is 10 million kilowatts. The loss of any transmission channel will affect the entire network of our province and Partial power grid balance has a great impact. Coordinating the power generation capacity of power sources inside and outside the province, rationally arranging reserve capacity, and coordinating the balance of power generation and consumption are of great significance to the stability of the power grid. [0003] Especially whe...

Claims

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Application Information

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IPC IPC(8): H02J3/06H02J3/46
CPCH02J3/003H02J3/06H02J3/46
Inventor 卫鹏周前刘建坤刘国平王岗汪成根朱鑫要
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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