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Multi-target power governance method for high-power-density distributed photovoltaic power connected power distribution network

A distributed photovoltaic, high power density technology, applied in the direction of photovoltaic power generation, electrical components, energy storage, etc., can solve the problems of voltage over limit, pollution, etc., to reduce the current harmonic distortion rate, maintain normal operation, and improve voltage deviation problem effect

Inactive Publication Date: 2018-10-16
TIANJIN UNIV +1
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned background technology, and provide a method for improving the power quality of the distribution network by configuring a composite energy storage device at the corresponding node. Power quality problems such as voltage over limit and harmonic pollution

Method used

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  • Multi-target power governance method for high-power-density distributed photovoltaic power connected power distribution network
  • Multi-target power governance method for high-power-density distributed photovoltaic power connected power distribution network
  • Multi-target power governance method for high-power-density distributed photovoltaic power connected power distribution network

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Embodiment approach

[0109] A 33-node power distribution system such as figure 2 As shown, the total active load of the system is 3715.0kW, and the total reactive load is 2300.0kvar. The line voltage reference value of the system is 12.66kV, and the branch parameters and node load parameters are shown in Table 1.

[0110]

[0111]

[0112]Table 1 shows the branch parameters and bus load data of the 33-node system

[0113] The system is connected to 16 high power density photovoltaics at the corresponding nodes, and the connection position and power are shown in Table 2. Set the installation range of the composite energy storage device as nodes 1 to 32, the maximum connected number is 2, and the maximum installed power is 600kW.

[0114]

[0115]

[0116] Table 2 Location and capacity of high power density photovoltaic access

[0117] Set the number of particles in the improved particle swarm optimization algorithm to 100, the number of iterations to 50, and set the acceleration fac...

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Abstract

The invention discloses a multi-target power governance method for a high-power-density distributed photovoltaic power connected power distribution network. The method includes the following steps that 1, storage batteries and supercapacitors are disposed on corresponding positions of the power distribution network to construct a combined energy storage system; 2, constraint conditions are made for the combined energy storage system; 3, node voltage deviation and a total harmonic distortion rate of current are adopted as power quality governance indexes of the combined energy storage system; 4, configuration of the evaluation indexes is carried out for the combined energy storage system after power quality governance. The method can solve power quality problems such as voltage over-limit and harmonic pollution which are caused by the high-power-density distributed photovoltaic power connected power distribution network.

Description

technical field [0001] The invention relates to a power quality control scheme for a distribution network, in particular to a power control method for voltage over-limit and harmonic pollution problems caused by high-power-density distributed photovoltaics connected to a distribution network. Background technique [0002] With the depletion of fossil energy and the trend of energy conservation and emission reduction, distributed power generation technology has been widely used. Among them, distributed photovoltaic power generation has attracted widespread attention due to its abundant resources, reliable devices, and freedom from site constraints. With the high power density distributed photovoltaic connected to the distribution network, due to its fluctuation and intermittent characteristics and the application of power electronic devices, serious voltage quality problems appear in the distribution network. The power quality problems caused by high power density distribute...

Claims

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Application Information

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IPC IPC(8): H02J3/32H02J3/38
CPCH02J3/383H02J3/32Y02E10/56Y02E70/30
Inventor 葛磊蛟赵晨睿陈超
Owner TIANJIN UNIV
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