Microgrid harmonic control method based on multi-function grid-connected inverter capacity distribution

A technology of harmonic control and capacity allocation, applied in AC network to reduce harmonic/ripple, harmonic reduction device, single-network parallel feeding arrangement, etc. It is difficult to meet the needs of network distributed governance and other issues

Inactive Publication Date: 2019-05-07
YANSHAN UNIV
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Problems solved by technology

Microgrid harmonic sources have the characteristics of decentralization and wide-area. The traditional method of centralized management has problems such as high management cost, single function of management equipment, and low utilization rate of management capacity. It is difficult to meet the management needs of increasingly complex network distribution. , not suitable for microgrids with dispersed harmonic sources

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  • Microgrid harmonic control method based on multi-function grid-connected inverter capacity distribution
  • Microgrid harmonic control method based on multi-function grid-connected inverter capacity distribution
  • Microgrid harmonic control method based on multi-function grid-connected inverter capacity distribution

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specific Embodiment

[0076] Such as figure 1 As shown, the method of the present invention uses the simulated annealing particle swarm optimization algorithm to perform optimization operations to solve the active output of the multi-functional grid-connected inverter in the microgrid and the remaining capacity of harmonic control. The specific steps are as follows:

[0077] S1. Construct the upper layer active power optimization model, which specifically includes the following steps:

[0078] S11. Under the upper-level optimization constraints, the initial distribution power capacity in the microgrid is established, and the initial population is established;

[0079] With the goal of minimizing the operating cost of the microgrid within the optimization period, an upper-level optimization objective function is established, as shown in formula (1)

[0080] minf up =C XS +C B / S (1)

[0081] In the formula, C XS is the network loss cost; C B / S is the electricity purchase / sale fee from the mic...

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Abstract

The invention discloses a microgrid harmonic control method based on multi-function grid-connected inverter capacity distribution. The microgrid multi-function grid-connected inverter capacity is an optimal control object, the minimum operating cost of the microgrid is taken as an evaluation index to establish an active optimization objective function, the system trend and the electricity sellingpower from the microgrid to the main network are taken as constraint conditions to construct an upper-layer active power optimization model; the minimized root-mean-square value of the harmonic distortion rate at each node of the microgrid is taken as an evaluation index to establish a harmonic optimization target function, the harmonics, node voltage amplitude and compensation are taken as constraint conditions to construct a lower-layer harmonic optimization model; and the simulated annealing particle swarm optimization algorithm is employed to perform solution of the upper-layer active power optimization model and the lower-layer harmonic optimization model. An efficient path is provided for solving the harmonic control of the microgrid with distributed harmonic sources.

Description

technical field [0001] The invention relates to the technical field of micro-grid harmonic control, in particular to a micro-grid harmonic control method based on capacity allocation of multi-functional grid-connected inverters. Background technique [0002] With the development of micro-grid technology, more and more micro-grids have been connected to the distribution network. With the continuous expansion of the micro-grid network, the distribution range and pollution scale of harmonic sources are also gradually increasing, while the ability of the micro-grid to absorb power quality pollution is weak, and the power electronic equipment in the network is very sensitive to power quality, and the requirements for power quality are relatively high. High, which makes the power quality problem of microgrid more prominent. Microgrid harmonic sources have the characteristics of decentralization and wide-area. The traditional method of centralized management has problems such as h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/01
CPCY02E40/40
Inventor 王宁魏凯贾清泉岳东窦春霞
Owner YANSHAN UNIV
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