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Calculation Method for Capacitor Parallel Compensation in Distribution Network Based on Local Tree

A calculation method and technology of distribution network, applied in reactive power compensation, reactive power adjustment/elimination/compensation, sustainable manufacturing/processing, etc., can solve the problem of poor handling of particle swarm algorithm discretization, easy to fall into local Optimal solutions, difficult to achieve compensation effects and other issues, to achieve the effect of increasing theoretical line loss, reducing economic benefits, and increasing investment funds

Inactive Publication Date: 2018-02-13
BEIJING XJ ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, the problem of this technology is: because the particle swarm optimization algorithm is not good at dealing with the discretization problem, and the reactive power compensation of the distribution network is to determine the compensation point and the number of compensation groups, which is a double-layer discretization optimization problem, and it is easy to fall into the Local optimal solution, especially when the scale of the distribution network is large, it is difficult to achieve the optimal compensation effect

Method used

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  • Calculation Method for Capacitor Parallel Compensation in Distribution Network Based on Local Tree
  • Calculation Method for Capacitor Parallel Compensation in Distribution Network Based on Local Tree
  • Calculation Method for Capacitor Parallel Compensation in Distribution Network Based on Local Tree

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Embodiment 1

[0033] see figure 1 , showing a flow chart of a calculation method for parallel compensation of distribution network capacitors based on local trees according to a specific embodiment of the present invention:

[0034] Step S1. Obtain the distribution network information step: obtain the measurement data of each distribution variable in the distribution network, that is, obtain the maximum active and reactive loads of the load year, obtain the topology data table and topology relationship table of the equipment and components in the actual distribution network operation, and obtain Relevant information about reactive power compensation of distribution network;

[0035] Preferably, the reactive power compensation related information of the distribution network includes the compensation period, electricity price, discount rate, and obtains the capacity and price of a single set of capacitors to be compensated;

[0036] Step S2. Calculation steps of the initial compensation sche...

Embodiment 2

[0048] see figure 2 , shows an 11-node distribution network, and its reactive power compensation calculation steps are as follows:

[0049] Step S1: The obtained distribution network information is shown in the following table:

[0050]

[0051] Table 1, distribution network information

[0052] The reactive power compensation information is shown in the following table:

[0053] Types of

electricity price

discount rate

Operating life

Single group capacity

single price

value

0.82

0.01

5

25kvar

25,000 yuan

[0054] Table 2. Reactive Power Compensation Information

[0055] Step S2: The whole distribution network is considered as a local tree, and the benefit-investment ratio is used as the objective function, and the benefit-investment ratio of each node as the point to be compensated is calculated by using the step-by-step increase method. After comparing the benefit-investment ratios of each node, it is obtained ...

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Abstract

A calculation method for parallel compensation of distribution network capacitors based on partial trees, which obtains distribution network information, initially calculates the initial compensation scheme for parallel capacitors, judges whether the partial trees need to be divided again, divides the corresponding partial trees, and determines each partial tree separately Compensation point, judge whether the local tree needs to be optimized again, further optimize the compensation point, compare the benefit-to-investment ratio and make a cyclical judgment until the output of each compensation node number and their compensation capacity under the condition of the maximum benefit-to-investment ratio. The invention can provide capacitor parallel compensation location and compensation capacity of radial distribution network, more effectively reduce the line loss rate in the operation process of the distribution network, improve the voltage distribution of the distribution network operation, and achieve the purpose of improving the economic benefits and power supply of the distribution network operation. The role of reliability has high practical value.

Description

technical field [0001] The invention relates to a distribution network compensation calculation method, in particular to a distribution network medium-voltage capacitor parallel compensation calculation method based on a partial tree. Background technique [0002] The distribution network not only provides relevant power to the load, but also provides reactive power. On the one hand, the amount of reactive power directly affects the voltage quality of the distribution network, and the voltage loss is directly related to the reactive power value of the power supply line; Reactive power is transmitted through the remote generator, which will inevitably increase the branch current, thereby increasing the theoretical line loss and reducing economic benefits; finally, under the condition of a certain line transmission capacity, the transmission of reactive power will reduce the transmission of line active power. Increase investment in power grid transformation. On-site compensa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18
CPCY02E40/30Y02P80/14
Inventor 吕志来李海王德金张东
Owner BEIJING XJ ELECTRIC
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