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Method for participating in electricity market clearing and safety checking by unmodeled small unit

A safety check and electricity market technology, applied in the direction of electrical digital data processing, instruments, calculations, etc., can solve problems that are difficult to achieve, and achieve the effect of improving accuracy and improving the security level of the power grid

Active Publication Date: 2019-12-06
NARI TECH CO LTD +2
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Problems solved by technology

However, it is still difficult to achieve in the existing technology

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  • Method for participating in electricity market clearing and safety checking by unmodeled small unit
  • Method for participating in electricity market clearing and safety checking by unmodeled small unit
  • Method for participating in electricity market clearing and safety checking by unmodeled small unit

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Embodiment Construction

[0013] In order to further illustrate the scope of application of the present invention, first in conjunction with the attached figure 1 Give a brief description of the grid model. like figure 1 As shown, the rectangular area in the figure is the 220kV and above transmission network, and the oval area is the transmission and distribution network with a voltage level of 110kV and below. The two power grids are connected through transformers T1 and T2. When the load of the 110kV power grid is large and the power generated by the generator connected to the 110kV power grid cannot meet the demand, the power grid above 220kV supplies power to the 110kV power grid through transformers T1 and T2; when the power generated by the generator of the 110kV power grid is surplus, then The surplus power is transmitted to other regions for consumption through transformers T1 and T2. According to the hierarchical regulation requirements of the power grid, the regulation scope of the provinci...

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Abstract

The invention provides a method for participating in electricity market clearing and safety checking by an unmodeled small unit. In an electric power spot market technical support system, when the physical model does not model the low-voltage-level small unit participating in the market, the active power transmitted to the main network by the small unit through the equivalent load is predicted byutilizing the equivalent load prediction active power through defining the hooking relationship and the power distribution coefficient of the small unit and the electrical bus or the equivalent load,and the real active power of the equivalent load is obtained to calculate the power flow. And the sensitivity values of the small unit and the main network branch are calculated by using the power distribution coefficient, the equivalent load and the sensitivity value of the main network branch, so that the influence of the output of the small unit can be considered in the DC power flow constraintin the optimization model construction. According to the method, the influence of unmodeled small unit power generation on the power grid tide and clearing result can be accurately considered in an optimized clearing and safety checking algorithm, and an accurate safety checking result and a market price signal are obtained. The method has important significance for improving the accuracy of clearing results of the power market and improving the safety level of the power grid.

Description

technical field [0001] The invention belongs to the technical field of electric power automation, and in particular relates to a method for unmodeled small units to participate in power market clearing and safety checking. Background technique [0002] In the technical support system of the electricity spot market, optimizing the clearing and safety checking algorithm is the core link to ensure the effective operation of the electricity market. The algorithm needs to use the physical model of the power grid for modeling and calculation, and also uses data such as historical measured data or state estimation sections as the basis for calculation. In the initial stage of power market construction, in order to reduce the difficulty of building the power market technical support system, the model data, measured data, state estimation data, etc. are generally read from the original dispatching control system to shorten the construction period of the power market system and reduce...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 张丙金涂孟夫丁恰曹荣章昌力冷月
Owner NARI TECH CO LTD
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