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A method for power grid black start

A technology of black start and power start, applied in the field of black start, can solve the problems of large unit vibration, high maintenance cost, complex equipment, etc., and achieve the effect of rapid power adjustment, fast response, and comprehensive power grid restoration.

Inactive Publication Date: 2017-02-01
SOUTHEAST UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Generally speaking, the traditional black start power supply includes water turbines and gas turbines with black start capabilities. However, using water turbines to achieve black start, the unit vibrates greatly in the initial stage of black start and under low load conditions; and in dry seasons and areas with scarce water resources, both Satisfying residential and industrial water use while ensuring power supply is very stressful, and often the two cannot be balanced
Gas turbines also have problems such as complex equipment and high maintenance costs

Method used

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  • A method for power grid black start
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  • A method for power grid black start

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] Such as figure 1 As shown, a power grid black start method of the present invention includes the following steps: when the power system fails and the power is cut off, it is judged whether to use the wind farm as the black start power supply according to the state of charge of the energy storage system configured in the wind farm. If the state of charge of the system is less than 0.2, the traditional black start power supply is used to start the large-capacity thermal power unit, and the power grid is gradually restored to the outside world; if the state of charge of the energy storage system is ≥ 0.2, the black start method of the wind farm is used to gradually restore the power grid to the outside world. Large-capacity thermal power units refer to thermal power units with a power greater than 300MW.

[0029] In the above met...

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Abstract

The invention discloses a black-start method for a power grid. The start method comprises the following steps: when an electric power system is powered off due to a fault, judging whether a wind power plant is used as a black-start power supply or not according to the charge state of an energy storage system configured in the wind power plant, if the charge state of the energy storage system is less than 0.2, starting a high-capacity thermal power unit by using the traditional black-start power supply, and externally recovering the power grid step by step. According to the black-start method, wind resources can be adequately utilized and the wind power plant is taken as the black-start power supply for carrying out black-start for the power grid.

Description

technical field [0001] The invention relates to a black start method, in particular to a power grid black start method. Background technique [0002] Black start refers to the process of gradually expanding the power supply range of the system through the start-up of units with self-starting capability in the system without relying on the help of other systems after a power outage in the entire power grid system, and finally realizing the recovery of the entire system . [0003] Generally speaking, the traditional black start power supply includes water turbines and gas turbines with black start capabilities. However, using water turbines to achieve black start, the unit vibrates greatly in the initial stage of black start and under low load conditions; and in dry seasons and areas with scarce water resources, both Satisfying residential and industrial water use while ensuring power supply is very stressful, and it is often impossible to balance the two. Gas turbines also ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCH02J3/38Y02E10/76
Inventor 汤奕冯祎鑫李峰申振
Owner SOUTHEAST UNIV
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