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Three-phase imbalance three-phase imbalance method for power distribution network with distributed power supplies

A distributed power supply and power flow calculation technology, applied in the computing field, can solve problems such as the influence of distributed power uncertainties, three-phase imbalance, and many processing objects

Active Publication Date: 2014-03-26
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0007] (4) The R / X ratio of the line is large, and the traditional decoupling method will have a large error
[0008] (5) Uncertain impact of distributed power generation
[0010] To sum up, the power flow calculation and program implementation methods of the distribution network are facing great challenges due to the complex network structure, many processing objects, large amount of data, and unbalanced three-phase.

Method used

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  • Three-phase imbalance three-phase imbalance method for power distribution network with distributed power supplies
  • Three-phase imbalance three-phase imbalance method for power distribution network with distributed power supplies
  • Three-phase imbalance three-phase imbalance method for power distribution network with distributed power supplies

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Embodiment Construction

[0121] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0122] like Figure 1-Figure 4 The present invention provides a method for calculating three-phase unbalanced power flow of a distribution network with distributed power sources, the method comprising the following steps:

[0123] Step 1: Determine the initial data information and perform topology analysis on the distribution network;

[0124] Step 2: Construct the node admittance matrix;

[0125] Step 3: Initialize the node voltage matrix;

[0126] Step 4: Calculate the node injection current matrix;

[0127] Step 5: Calculate the node voltage matrix in t+1 iterations;

[0128] Step 6: Determine whether the node voltage has converged.

[0129] The initial data information in the step 1 includes distribution network lines, distribution network switches, distribution network loads, distributed power supply connection relationships, lines, loads, distribut...

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Abstract

The invention provides a three-phase imbalance three-phase imbalance method for a power distribution network with distributed power supplies. The three-phase imbalance three-phase imbalance method for the power distribution network with distributed power supplies comprises: aiming at the complex power distribution network, on basis of the fundamental principle of the implicit Gaussian load flow calculation method.

Description

technical field [0001] The invention relates to a calculation method, in particular to a three-phase unbalanced power flow calculation method of a distribution network with distributed power sources. Background technique [0002] For the distribution network, the power flow calculation must meet the applicable objects and achieve good accuracy, speed, convergence and robustness. Power flow calculation is a basic tool for power system analysis and has a profound theoretical research foundation; related contents include deterministic power flow, stochastic power flow, fuzzy power flow, interval power flow, optimized power flow, etc. The calculation methods include Newton-Raphson method, P-Q decomposition method, Forward-backward substitution method, loop impedance method, implicit Gaussian method, etc. The improvement methods include network decomposition, distributed / parallel computing, intelligent method solution, etc. At present, the theoretical research resources of power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00G06F19/00
CPCY02E40/50
Inventor 刘科研何开元盛万兴
Owner STATE GRID CORP OF CHINA
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