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Optimal configuration method and system for multi-element power quality control device

A technology that optimizes configuration and power quality. It is used in circuit devices, harmonic reduction devices, electrical components, etc., and can solve problems such as line loss, voltage deviation, and harmonic power quality problems.

Pending Publication Date: 2019-08-06
CHINA ELECTRIC POWER RES INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in the power flow calculation involving distributed power generation, it can be considered that the DG operates under the mode of constant active power, while the operation mode of its reactive power and voltage needs to be determined according to the specific conditions such as the capacity of the DG, the form of power generation, and the interface mode. , has not been studied in depth; the line loss is serious, and at the same time it causes serious voltage deviation, harmonics and other power quality problems that are difficult to solve

Method used

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  • Optimal configuration method and system for multi-element power quality control device
  • Optimal configuration method and system for multi-element power quality control device
  • Optimal configuration method and system for multi-element power quality control device

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Embodiment 1

[0109] The present invention proposes a multivariate power quality control device optimization configuration method such as figure 1 Shown include:

[0110] S1 obtains the topology of the distribution network (such as figure 2 shown);

[0111] S2 is based on the topological structure of the distribution network, using a genetic algorithm to solve the pre-established optimal configuration model to obtain an optimal solution;

[0112] S3 obtains the position, type and quantity of the filter device to be installed based on the optimal solution;

[0113] The optimal configuration model is constructed with the goal of constructing the filter device and determining the type and installation information of the filter device for optimal network loss of the distribution network;

[0114] The filtering device types include: active filters, passive filters and passive and active hybrid filters.

[0115] This method combines genetic optimization algorithm, network harmonic power flow...

Embodiment 2

[0159] An optimal configuration system for multiple power quality control devices, including:

[0160] Obtaining module: used to obtain the topology of the distribution network;

[0161] Optimization module: used to solve the pre-established optimal configuration model based on the topology of the distribution network by using a genetic algorithm to obtain an optimal solution;

[0162] Confirmation module: obtain the position, type and quantity of the filter device to be installed based on the optimal solution;

[0163] The optimal configuration model is constructed with the goal of constructing the filter device and determining the type and installation information of the filter device for optimal network loss of the distribution network;

[0164] The filtering device types include: active filters, passive filters and passive and active hybrid filters.

[0165] The optimization module includes: constructing an optimal configuration model submodule and a calculation submodul...

Embodiment 3

[0210] The optimal configuration method of multiple power quality control devices provided by the present invention includes the following steps:

[0211] Step1: Initialize.

[0212] Read in the system data, including the parameters of each component (total number of nodes, line parameters, load parameters, transformer parameters), each harmonic source current value; give the upper and lower limits of each unequal constraint, including the harmonic limit standard (harmonic wave voltage content rate and voltage total harmonic distortion rate limit); the relevant parameters in the given genetic algorithm (population size Pop, maximum value Pc1 and minimum value Pc2 of crossover rate, maximum value Pm1 and minimum value Pm2 of mutation rate).

[0213] Step2: Carry out initial power flow calculation.

[0214] Determine whether there is a ring network, and if so, perform ring removal; then stratify the radial power grid, calculate the initial fundamental wave and harmonic power fl...

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Abstract

The technical scheme provided by the invention includes the steps of acquiring the topology structure of a distribution network; solving a pre-established optimal configuration model by adopting a genetic algorithm based on the topology structure of the distribution network to obtain an optimal solution; and acquiring the position, type and quantity of filtering devices required to be installed based on the optimal solution. The optimal configuration model is constructed by taking the construction of the filtering device type and installation information determined by the optimal loss of the distribution network as an objective. The filtering devices include active filters, passive filters and passive and active hybrid filters according to the type. The technical scheme provided by the invention combines the genetic optimization algorithm, network harmonic power flow analysis and comprehensive optimization design of passive and active filter bank parameters, can effectively suppress harmonic waves and enables the total investment cost of the filtering devices to be low.

Description

technical field [0001] The invention designs power quality control monitoring, evaluation and control, and specifically relates to a method and system for optimal configuration of multiple power quality control devices. Background technique [0002] A large number of distributed power sources are connected to the county distribution network in an orderly manner, which makes it difficult to accommodate the power grid, and the power flow is reversed, resulting in serious line loss. At the same time, it causes serious voltage deviation, harmonics and other power quality problems. Power supply presents great challenges. [0003] At present, the research and practice of power quality management mainly focus on three aspects: in terms of equipment development, it mainly focuses on active filter devices, passive filter devices and reactive power compensation devices, and there is less research on optimal selection and configuration; In terms of analysis and calculation, traditiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01
CPCH02J3/01H02J2203/20Y02E40/40
Inventor 寇凌峰盛万兴吴鸣季宇徐毅虎屈小云侯小刚郑楠潘静徐斌牛耕
Owner CHINA ELECTRIC POWER RES INST
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