Real-time load regulating method for power grid using hydro-thermal power working condition self-matching mode

A real-time load and self-matching technology, applied in the direction of single-network parallel feeding arrangement, etc., can solve the problem that the scheduling method is difficult to meet the working condition requirements of cascade hydropower stations in different periods

Active Publication Date: 2015-06-10
CENT CHINA GRID +1
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem that the dispatching method existing in the prior art is difficult to meet the working condition requirements of cascade hydropower stations in different periods, and to provide a method that can not only mee

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  • Real-time load regulating method for power grid using hydro-thermal power working condition self-matching mode
  • Real-time load regulating method for power grid using hydro-thermal power working condition self-matching mode
  • Real-time load regulating method for power grid using hydro-thermal power working condition self-matching mode

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Embodiment 1

[0102] A method for adjusting real-time loads in the self-matching mode of water and thermal power working conditions in the power grid. The method takes the Xiluodu-Xiangjiaba cascade hydropower station in the lower reaches of the Jinsha River as the research object (the Xiluodu-Xiangjiaba cascade power is mainly sent out through high-voltage direct current transmission lines. However, there will still be a certain amount of electricity to be supplied to the Sichuan power grid during the dry season; under normal circumstances, the power transmitted by the cascade through the high-voltage DC line is relatively stable, so the daily load fluctuation of the Xiluodu-Xiangjiaba cascade is mainly from the Sichuan power grid), and follow the steps below conduct:

[0103] Step 1: Calculate the difference ΔP between the real-time assigned load of the power grid and the planned load of the previous day, which is outside the output regulation dead zone of the cascade hydropower station, a...

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Abstract

The invention discloses a real-time load regulating method for a power grid using a hydro-thermal power working condition self-matching mode. The real-time load regulating method includes that calculating the difference delta P between the real-time released load of the power grid and the planning load of the previous day, confirming a hydro-thermal power load regulating principle according to the current scheduling period of a cascade hydropower station, under the constraints of a water level running control range established at the medium-term scheduling and a thermal power output bandwidth, regulating the hydro-thermal power output in real time according to the hydro-thermal power load regulating principle, delta P and the final water level of each time period of the hydropower station, making a hydro-thermal power output plan, and under the constraints of running water level, discharged volume and time period water level/flow rate change amplitude, optimally distributing load between cascade hydropower stations according to the traditional maximum energy storage target according to the hydro-thermal power output plan. The real-time load regulating method for the power grid using the hydro-thermal power working condition self-matching mode meets the working condition requirements of different periods of the cascade hydropower station and is capable of giving consideration to the stability and economical efficiency of the power grid.

Description

technical field [0001] The invention belongs to the fields of hydropower energy optimization and electric power system optimization dispatching, and specifically relates to a method for adjusting real-time loads in a self-matching mode of the hydropower and thermal power working conditions of the power grid when the load of the power grid changes in different dispatching periods of cascade hydropower stations. Background technique [0002] As an important peak-shaving and frequency-regulating power source in the power system, cascade hydropower stations need to adjust their output in a timely and accurate manner to meet the requirements of instantaneous load changes in the power grid and maintain safe and stable operation of the system. However, when the load changes, the network dispatcher generally adjusts the output of the hydropower station in real time based on his own experience. Because he does not fully understand the storage situation of each hydropower station and t...

Claims

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Application Information

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IPC IPC(8): H02J3/46
CPCH02J3/46
Inventor 周建中孙新德莫莉张胜严冬李勇刘懿张祥陈璐江保锋李超顺姜曼闫宝伟孙怀卫曾小凡赵娜
Owner CENT CHINA GRID
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