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Extension cone method capable of sensing real-time situation of power distribution network

A distribution network and situational technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of poor real-time performance and inability to improve the accuracy of distribution network state estimation and estimation

Inactive Publication Date: 2014-04-16
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD +1
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Problems solved by technology

The disadvantage of this technical solution is that, firstly, it needs to repeat the estimation many times to get the estimated value, so the real-time performance is not good; Overall Estimation Accuracy in Network State Estimation

Method used

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  • Extension cone method capable of sensing real-time situation of power distribution network
  • Extension cone method capable of sensing real-time situation of power distribution network
  • Extension cone method capable of sensing real-time situation of power distribution network

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Embodiment

[0044] Example: such as figure 1 As shown, the present invention provides an extended cone method for perceiving the real-time situation of the distribution network, and is a method for calculating the power flow of the distribution network based on state estimation. The specific steps are as follows:

[0045] Step 1: Read in the data, including the connection relationship between nodes and branches, the real-time data returned by installed measurement points, and the historical load of points without measurement devices (also called pseudo-measurement points).

[0046] Step 2: Establish a planning mathematical model, including the objective function, the equality constraints of the power flow equation, and the inequality constraints of voltage and load;

[0047] The objective function is:

[0048] (6)

[0049] in, is a state variable, , is the node voltage phase angle; Measure for quantity the weight of; Measure for quantity the measured value; is a measur...

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Abstract

The invention discloses an extension cone method capable of sensing the real-time situation of a power distribution network. According to the extension cone method, an extension cone planning model is established, real-time trend results such as the voltage amplitude value and the phase angle of nodes of the whole network are calculated, and the purpose of sensing the real-time situation of the power distribution network is achieved. The extension cone method comprises the following steps that first, net rack data are read, the net rack data comprise the connection relation of the nodes and branch circuits, real-time data returned by points which are provided with measuring devices and historical loads of points which are not provided with the measuring devices; second, a planning mathematical model is established, the planning mathematical model comprises an objective function model, a trend equation equality constraint, an inequality constraint of node voltages and load nodes; third, secondary cone planning processing is conducted on the trend equation equality constraint, the node voltages, node active power and node reactive power respectively, and state estimation models of an objective function, the equality constraint and the inequality constraint are obtained; fourth, the state estimation models are solved, so that the voltage amplitude of the nodes of the power distribution network and the trend information of the phase angle are obtained, and the purpose for sensing the real-time situation of the power distribution network is achieved.

Description

technical field [0001] The invention relates to the technical field of power system steady-state analysis, in particular to a calculation method using extended cone programming for sensing the real-time situation of a distribution network. Background technique [0002] With the further development of the smart grid, distributed energy is gradually connected to the distribution network, which brings huge challenges to the operation and planning of the distribution network. Therefore, it is necessary to find an accurate method is particularly important. [0003] In the power network, distribution network measurement devices need to be arranged along the feeder line, the site environment is complex, and the maintenance cost is high. In addition, the grid structure of the distribution network changes rapidly, and there are many new and reconstructed lines, which require timely installation and adjustment of measuring devices. Due to cost and workload constraints, in fact, only ...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 俞小勇李佩杰高立克韦化李珊李滨祝文姬杜孟远吴智丁杨秀菊李克文范金月吴丽芳吴剑豪
Owner ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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