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A method for multi-objective evaluation of active distribution network power supply capability

A technology of active distribution network and power supply capacity, applied in data processing applications, forecasting, instruments, etc., can solve problems such as failure to consider the impact

Pending Publication Date: 2019-01-15
TIANJIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional assessment of power supply capacity fails to consider the impact of the coordination of new sources, grids and loads on power supply capacity.

Method used

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  • A method for multi-objective evaluation of active distribution network power supply capability
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  • A method for multi-objective evaluation of active distribution network power supply capability

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Experimental program
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Embodiment 1

[0065] The purpose of the embodiments of the present invention is to address the problem of evaluating the power supply capacity of the active distribution network considering the synergy of the source network and the load, and propose a multi-objective power supply capacity evaluation method for the active distribution network considering the cost of the coordinated control of the source network and the load. See Figure 1-Figure 4 , the method includes the following steps:

[0066] Step 101: Initialize the network topology of the active distribution network, distributed power output, and controllable loads;

[0067] Step 102: Calculate the power supply capacity of the active distribution network and the control cost of the active distribution network source network load under the initialization condition (that is, calculate the value corresponding to the initial condition);

[0068] Step 103: Establish the probabilistic constraint conditions of the active distribution networ...

Embodiment 2

[0079] Combined with the specific calculation formula, Figure 1-Figure 4 , and examples further introduce the scheme in embodiment 1, mainly including the following steps, see the following description for details:

[0080] 1. Based on the analysis of the active distribution network, initialize the source network load control scheme of the active distribution network

[0081] (11) Based on the output constraints of the controllable distributed generation and the probability distribution of the output of the renewable distributed generation, the output of the distributed generation is initialized.

[0082] For the uncertainty of renewable energy, it is necessary to determine its probability density distribution, so the specific steps are:

[0083] In step a, the Monte Carlo method is used to simulate the photovoltaic output, and the probability output of photovoltaic can be expressed by the following formula:

[0084]

[0085]

[0086] Among them, f(P M ) is the outpu...

Embodiment 3

[0199] The embodiment of the present invention selects the improved IEEE 33 node power distribution system as the ADN calculation example studied, Figure 5 The improved active distribution network system diagram is given. The loads at nodes 8, 14, 24, 30, and 32 are treated as interruptible loads, and the interruptible ratio range of the interruptible loads is 0-10%. Gas turbines are installed at nodes 8, 13, 16, and 25 as controllable DGs. The installed capacity of the gas turbine is 600, 600, 650, 650kW, and the unit gas cost is 0.4 yuan / kWh.

[0200] By partitioning the test case, calculating the power supply capacity and control cost in different regions, and making a Pareto frontier diagram of the multi-objective solution, analyzing the Pareto solution set, and finding out the source network load control corresponding to the compromise optimal solution scheme as the final decision solution.

[0201] Table 1 Comparison of power supply capabilities

[0202]

[0203]...

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Abstract

A method for multi-objective evaluation of power supply capability of active distribution network includes the following steps: 1) establishing constraint conditions of active distribution network considering source network load control, the output of fan and photovoltaic in active distribution network is generated by Monte Carlo sampling, Distributed-Generation-Based output, Network topology, load response constraints to generate the corresponding active distribution network source network load coordination scheme, according to the fan, photovoltaic output and the corresponding load level andactive distribution network grid structure power flow calculation, power flow calculation results based on chance constraints to determine whether to meet the confidence in the probability constraintconditions; 2) if yes, calculating that power supply capacity of the active distribution network and the cost of source network load control, if not, re-assigning the two objective function values toexecute step 3); 3) utilizing the improved crossover operator and the elite selection strategy to judge and updating the two target values of the active distribution network power supply capacity andthe source network load control cost, and obtaining the Pareto solution set based on the non-dominated sorting; 4) the Pareto solution set are screened, the compromise optimal solution is selected, and the evaluation results of the active distribution network multi-objective optimization and the source network load adjustment scheme are output.

Description

technical field [0001] The invention relates to the field of power system optimization and evaluation, in particular to a multi-objective evaluation method for the power supply capacity of an active distribution network considering the synergy between source, network and load. Background technique [0002] With the aggravation of smog in recent years, many cities in northern my country have begun to promote the "coal-to-electricity" policy to reduce coal-burning pollution in winter and improve air quality. In the context of environmental protection, electric vehicles are getting more and more attention and are connected to the distribution network in large numbers. In this context, the access of such a large number of loads will definitely have an impact on the safe and reliable operation of the distribution network. Therefore, it is of great importance to accurately calculate the safe load capacity allowed to be connected to the distribution network and to do a good job in ...

Claims

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06
Inventor 孔祥玉雍成思陈瑛于力马溪原
Owner TIANJIN UNIV
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