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Optimization method for safety and stability control measure of multi-direct-current power system

A security and stability control and power system technology, applied in the field of power systems, can solve problems such as interrupting power plant operation and power generation, increasing the difficulty of power grid control, etc., to achieve the effect of improving stability, strengthening backup protection methods, and increasing fault handling measures

Active Publication Date: 2012-04-25
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A large number of units cut off will cause large power flow changes in the power grid, increase the difficulty of power grid control, and interrupt the operation and power generation of power plants; and a large number of load cuts will have a huge impact on social economy and people's lives

Method used

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  • Optimization method for safety and stability control measure of multi-direct-current power system

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Embodiment Construction

[0037] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0038] figure 2 It is a flowchart of the implementation method, and the specific steps include:

[0039] Step (1): Determine the grid scale, structure, operation mode, DC power transmission direction, transmission capacity, and DC sending and receiving end conditions of the multi-DC power system to be studied. The power grids studied in this example include three large power grids in Central China, North China, and East China (referred to as Sanhua Power Grid). Central China power grids, especially Sichuan power grids, are dominated by hydropower, while North China and East China power grids are dominated by thermal power. According to the power grid planning plan, the Central China-North China-East China power grids are interconnected through 1000kV AC UHV tie lines, and the Huainan-South Anhui-Zhebei-Shanghai West p...

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Abstract

The invention discloses an optimization method for safety and stability control measures of a multi-direct-current power system. The optimization method comprises the steps of determining the grid scale, operation method, direct-current supply power and transmitting and receiving end situations of a target power system; conducting stability analysis to the target power system, and determining whether the safety and stability control measures are required to be taken to the grid or not after a direct-current line is determined to be faulted; if so, selecting a direct-current group for coordination control; determining the promoting power and promoting speed of the direct-current group; recalculating the generation shedding and shedding load of a direct-current fault, wherein standby control measures can be additionally taken to the generation shedding and shedding load after direct-current power is failed to be promoted; and determining the implementation scheme of the safety and stability control measures. After the safety and stability control measures of the multi-direct-current power system are coordinately optimized by adopting the optimization method, the direct-current adjustable capacity of the system can be effectively utilized, the stability of the system after the fault occurs is improved, the number of the safety and stability control measures for generation shedding, shedding load and the like is reduced, and the impacts caused by the direct-current fault to power operation, industrial production and the living of people are reduced.

Description

Technical field: [0001] The invention relates to the field of power systems, in particular to an optimization method for safety and stability control measures of multi-DC power systems. Background technique: [0002] In order to ensure the safe and stable operation of the power system, in addition to establishing a reasonable grid structure and arranging a reasonable operation mode, appropriate safety and stability control measures should also be provided. In a multi-DC power system (this method refers to the operation of multiple DC lines in the power system, and the sending-end and receiving-end converter stations of each DC line are in the same AC synchronous power grid), when a DC blocking fault occurs, the current method The safety and stability control measures only include removing the unit at the sending end of the DC line and (or) removing the load at the receiving end, that is, the contents of steps (1) and (2) in this optimization method, and do not consider the s...

Claims

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Application Information

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IPC IPC(8): H02J1/00H02J3/36H02J3/38
CPCY02E60/60
Inventor 王建明张健孙华东任大伟宋墩文易俊
Owner CHINA ELECTRIC POWER RES INST
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