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Uncertainty power flow analysis method and device of active distribution network

An active distribution network, uncertainty technology, used in instruments, data processing applications, resources, etc.

Pending Publication Date: 2017-06-30
CHINA ELECTRIC POWER RES INST +3
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AI Technical Summary

Problems solved by technology

The intermittence and volatility of DG bring a lot of uncertainties to the power grid, which is becoming more and more prominent in ADN

Method used

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  • Uncertainty power flow analysis method and device of active distribution network
  • Uncertainty power flow analysis method and device of active distribution network
  • Uncertainty power flow analysis method and device of active distribution network

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Embodiment Construction

[0064] The present invention proposes an uncertain power flow analysis method for an active distribution network, such as figure 1 As shown, its methods include:

[0065] 1) Determine the input variables of the pre-built active distribution network uncertainty power flow model; the input variables are determined according to the current operating parameters of the distribution network; the input variables include probabilistic uncertain input variables and possible uncertain inputs variable;

[0066] Collect the current operating parameters of the distribution network and use them as the initial value of the uncertain power flow model of the active distribution network; including distribution network frame parameters (line admittance, impedance, transformer admittance, impedance, etc.), distributed power ( Fans, photovoltaic generators, micro gas turbines) capacity, attribute parameters (such as fan rating, cut-in, cut-out wind speed, photovoltaic standard light irradiance), ...

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Abstract

The invention provides an uncertainty power flow analysis method and device of an active distribution network. Input variables of an uncertainty power flow model, constructed in advanced, of an active distribution network are determined, wherein the input variables are determined according to operating parameters of the current distribution network and include a probabilistic uncertain input variable and a possibility uncertain input variable; With the model, output variables of the probabilistic uncertain input variable and the possibility uncertain input variable are determined by using an unscented transformation method and an alpha-cut set method; and according to the output variables of the probabilistic uncertain input variable and the possibility uncertain input variable, probability-probability joint assessment based on a D-S theory is executed to obtain active distribution network uncertainty power flow distribution. Therefore, sending of the operating state of the active distribution network within a current or prediction period can be realized and auxiliary decision-making information can be provided for operation scheduling.

Description

Technical field: [0001] The invention belongs to the technical field of distribution network operation, and in particular relates to an uncertain power flow analysis method and device for an active distribution network. Background technique [0002] The distributed energy of the active distribution network (Active Distribution Network, ADN) presents the new characteristics of various types, large quantities, and scattered access points. ) needs to be further improved. The intermittence and volatility of DG bring a lot of uncertainties to the power grid, which is more and more prominent in ADN. Without taking into account the change of grid structure, the uncertainty of ADN mainly comes from input variables such as load, DG, and energy storage. Among them, the load and uncontrollable DG generally follow a specific probability distribution, while the use rules of controllable DG and energy storage difficult to obtain. [0003] Commonly used uncertain power flow solutions ar...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0639G06Q50/06
Inventor 蒲天骄李晨赵灿陈乃仕董雷李烨
Owner CHINA ELECTRIC POWER RES INST
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