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Predicting method for variation trend of active load of 500 kV transformer substation

A technology of load forecasting and forecasting method, which is applied in the direction of load forecasting, electrical components, circuit devices, etc. in the AC network, and can solve the problems that the 500kV substation has no active load forecasting data and cannot be directly applied, so as to improve voltage stability and voltage Quality, the effect of eliminating voltage fluctuations

Active Publication Date: 2018-10-09
ELECTRIC POWER SCI & RES INST OF STATE GRID TIANJIN ELECTRIC POWER CO +3
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Problems solved by technology

In the provincial power grid, the 500kV substation does not have direct active load forecast data, so this method cannot be directly applied

Method used

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  • Predicting method for variation trend of active load of 500 kV transformer substation
  • Predicting method for variation trend of active load of 500 kV transformer substation
  • Predicting method for variation trend of active load of 500 kV transformer substation

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Embodiment Construction

[0027] Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:

[0028] A method for predicting the change trend of active load of 500kV substation in the automatic voltage control proposed by the present invention, the power flow model shows that 500kV has several 220kV substations, through the sensitivity relationship between the busbar of 220kV station and the main transformer of 500kV station, the active load of the busbar of 220kV substation Predict the data, calculate the active load data of the 500kV power station, and then calculate the active load trend of the 500kV substation.

[0029] In this embodiment, the control calculation is performed on a provincial adjustment area, and the station-to-station connection relationship in this embodiment is as follows figure 2 As shown, there are two 500kV substations in this area, named A and B; four 220kV substations, named C, D, E, and F;

[0030]The present ...

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Abstract

The invention relates to a predicting method for the variation trend of the active load of a 500 kV transformer substation in automatic voltage control. The predicting method is technically characterized by comprising the following steps that 1, the control cycle T of a power grid is preset; 2, the sensitivity S<ij> of the active quasi stable state between a 220 kV station bus and a 500 kV stationmain transformer is obtained through calculating based on a power flow model; 3, 96-point bus active load predicted data F of a 220 kV transformer substation are read; 4, active load predicted data of reduction from a station i to a station j are calculated; 5, active load predicted data of the 500 kV station j are formed; and 6, the load variation trend of the 500 kV station j is predicted. According to the predicting method, through the trend of the active load predicted data of the 500 kV station, in-advance prevention and control are conducted, and thus voltage fluctuation is eliminated.

Description

technical field [0001] The invention belongs to the technical field of automatic voltage control of electric power systems, and relates to a method for predicting the change trend of active load in substations, in particular to a method for predicting the change trend of active load in 500kV substations. Background technique [0002] Automatic voltage control (hereinafter referred to as AVC, Automatic Voltage Control) system is an important means to achieve grid security (increase voltage stability margin), economy (reduce network loss), and high-quality (increase voltage qualification rate) operation. The AVC system architecture is based on the grid energy management system (EMS), which can use the real-time operation data of the grid to scientifically make the best reactive power and voltage adjustment scheme from the perspective of overall grid optimization, and automatically send it to power plants, substations, and lower-level grid dispatchers Institutional execution. ...

Claims

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/00H02J3/003H02J2203/20
Inventor 马世乾郭凌旭汤磊张志君陈建张杰刘永峰廖小梦王梓史磊康宁戚艳
Owner ELECTRIC POWER SCI & RES INST OF STATE GRID TIANJIN ELECTRIC POWER CO