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Partition interconnection operation scheduling method of urban power grid based on flexible direct-current power transmission technique

A technology of flexible direct current transmission and urban power grid, which is applied in the direction of power transmission AC network, emergency treatment AC circuit layout, load forecasting in AC network, etc., to achieve the effects of avoiding short-circuit current, fast fault handling, and improving safety and reliability

Active Publication Date: 2018-03-09
STATE GRID TIANJIN ELECTRIC POWER +1
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Problems solved by technology

However, at present, there is still a lack of an urban power grid partition interconnection operation scheduling method based on flexible DC transmission technology.

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  • Partition interconnection operation scheduling method of urban power grid based on flexible direct-current power transmission technique
  • Partition interconnection operation scheduling method of urban power grid based on flexible direct-current power transmission technique
  • Partition interconnection operation scheduling method of urban power grid based on flexible direct-current power transmission technique

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Embodiment Construction

[0030] The following describes in detail the operation scheduling method for urban power grid partition interconnection based on the flexible direct current transmission technology provided by the present invention with reference to the accompanying drawings and specific embodiments.

[0031] The present invention utilizes image 3The system shown is an example for analysis. In this example, Partition 1 and Partition 2 of a city’s 220 kV transmission network are interconnected through a flexible direct current transmission system, which ensures that Partition 1 and Partition 2 are in a normal state And the stable operation of the power grid under fault conditions, bus 1 to bus 11 are 220 kV buses, of which bus 1 to bus 9 are 220 kV buses of 220 kV substation, and bus 10 and bus 11 are 220 kV buses of 500 kV substation Volt bus. In the present invention, partition 1 is taken as the research object for detailed analysis.

[0032] Such as figure 2 As shown, the urban power gr...

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Abstract

The invention relates to a partition interconnection operation scheduling method of an urban power grid based on a flexible direct-current power transmission technique. The method comprises the following steps: setting a current moment t, if failures happen or a scheduler manually changes the state of a power grid, updating the moment t according to a moment t' after failure treatment or after manual adjustment, and starting operation scheduling analysis in the next time period [t, t + delta t]; reading the power grid structure at the moment t, reading an AGC system power generation curve, AVCsystem inactive data and a load predicting curve in the time period [t, t + delta t], and storing power plant output of a typical time section, power grid inactive configuration and load predicting data in the time period [t, t + delta t]. By implementing partition interconnection of power supply of the urban power grid by means of a flexible direct-current power transmission system, quick failure treatment of power supply partitions in a failure process and after failures are removed is achieved by fully utilizing high speed responding ability and power adjusting ability of the flexible direct-current power transmission system on the premise of ensuring the power supply safety of the interconnected partitions in a normal mode.

Description

technical field [0001] The invention belongs to the technical field of electric power supply, and in particular relates to an operation scheduling method for urban power grid partition interconnection based on flexible direct current transmission technology. Background technique [0002] The urban power grid is an important part of the power system and an important infrastructure for urban modernization, which is related to social stability and economic livelihood. With the continuous development of my country's urban power grids, most of the existing large-scale urban transmission grids form two-stage ring networks of 500 kV and 220 kV. The transmission capacity of the power grid reduces the hazards of the electromagnetic ring network, and at the same time facilitates the setting and implementation of the safety and stability defense line of the power grid. The large-scale urban transmission network generally adopts the operation strategy of 220 kV power grid divisions. The ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36
CPCH02J3/001H02J3/003H02J3/36Y02E60/60
Inventor 丁承第刘忠义宋佳闫大威周进雷铮李媛媛王魁宣文博毛华刘树勇高振生
Owner STATE GRID TIANJIN ELECTRIC POWER
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