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Regional power grid dynamic reactive power optimization method based on interior point decoupling method and linear mixed integer programming method

A linear mixed, integer programming technique, used in electrical components, circuit devices, data processing applications, etc.

Pending Publication Date: 2021-03-19
STATE GRID QINGHAI ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The above problems lead to the dynamic reactive power optimization problem is a large-scale mathematical optimization problem with time-coupling nonlinear mixed integers with absolute value. How to solve it quickly and accurately is a research difficulty

Method used

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  • Regional power grid dynamic reactive power optimization method based on interior point decoupling method and linear mixed integer programming method
  • Regional power grid dynamic reactive power optimization method based on interior point decoupling method and linear mixed integer programming method
  • Regional power grid dynamic reactive power optimization method based on interior point decoupling method and linear mixed integer programming method

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Experimental program
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Embodiment 1

[0106] see figure 1 , a dynamic reactive power optimization method for regional power grids based on interior point decoupling method and linear mixed integer programming method, including the following steps:

[0107] 1) Establish a dynamic reactive power optimization model.

[0108] The objective function of the dynamic reactive power optimization model is as follows:

[0109]

[0110] In the formula, f represents the total active power loss of the network in a control period. T is the total number of segments divided by the load curve. ΔT t Indicates the time length of the t period. P S.t The active power injected into the area by the balance node for the period t. P loss.t is the active power loss of the network during the t period.

[0111] The constraints of the dynamic reactive power optimization model include network node power balance constraints, on-load voltage regulation ideal transformer branch voltage constraints, state variable upper and lower limit c...

Embodiment 2

[0201] The dynamic reactive power optimization method of the regional power grid based on the interior point decoupling method and the linear mixed integer programming method includes the following steps:

[0202] 1) Establish a dynamic reactive power optimization model, the steps include:

[0203] 1.1) Set the optimization objective function

[0204] Taking the minimum network loss as the optimization goal, it is represented by the active output of the balance node, that is,

[0205]

[0206] In the formula, f represents the total active power loss of the network within a control cycle; T is the total number of segments divided by the load curve; ΔT t Indicates the time length of the tth period; P S.t The active power injected into the area by the balance node for the period t.

[0207] 1.2) Set constraints

[0208] Constraint conditions include not only network node voltage constraints and power balance constraints, but also security operation constraints of on-load t...

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Abstract

The invention discloses a regional power grid dynamic reactive power optimization method based on an interior point decoupling method and a linear mixed integer programming method. The method comprises the following steps: 1) establishing a dynamic reactive power optimization model; 2) relaxing discrete variables in the dynamic reactive power optimization model into continuous variables, and constructing a relaxed dynamic reactive power optimization model; 3) resolving the relaxation dynamic reactive power optimization model by using an interior point decoupling method to obtain a continuous solution of the switching group number of the grounding capacitor and the gear of the on-load voltage regulation transformer; 4) constructing a linear mixed integer optimization model by using the continuous optimal solution of all variables, and setting a search space of discrete variables; and 5) resolving the linear mixed integer optimization model to obtain the switching group number of the grounding capacitor and the gear of the on-load voltage regulating transformer. According to the method, an interior point decoupling method and a linear mixed integer programming method are combined, and a domain search method is adopted for quick solution, so that the solution efficiency is effectively improved on the basis of ensuring the calculation precision.

Description

technical field [0001] The invention relates to the field of power system scheduling automation, in particular to a dynamic reactive power optimization method for a regional power grid based on an interior point decoupling method and a linear mixed integer programming method. Background technique [0002] Dynamic reactive power optimization means that the network structure parameters are known and remain unchanged, the active output of all generator nodes except the balance node is known, and the load curve of the next day is given. , Capacitor banks and other reactive power control equipment can be regulated, and the reactive power distribution and node voltage level of the system can be adjusted under the conditions of satisfying its own control capability range, the constraints of the number of operations of the discrete reactive power control equipment throughout the day and the safety constraints of the power grid. Optimum, reducing network energy loss and realizing saf...

Claims

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/06G06F30/30H02J3/00H02J3/50
CPCG06Q10/04G06Q50/06G06F30/30H02J3/00H02J3/50H02J2203/20Y04S10/50Y02E40/70Y02E40/30
Inventor 张杰郑云耀胡显文马勇飞刘生春王献敏王华彪王沧海颜伟王恒凤冉垚朱爱珍何艳娇肖明杨军
Owner STATE GRID QINGHAI ELECTRIC POWER
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