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Grid management device configuration method for distributed quasi-synchronous grid measurement system

A technology of measurement system and configuration method, which is applied in the direction of photovoltaic power generation, single-network parallel feeding arrangement, etc., and can solve problems such as power generation cannot meet expectations and power grid quality declines

Active Publication Date: 2019-05-24
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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Problems solved by technology

[0007] The purpose of the present invention is to propose a distributed quasi-synchronous power grid measurement system configuration method for the power grid management device for the problems of grid quality degradation caused by photovoltaic unit access at the end of the grid and power generation that cannot meet expectations.

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  • Grid management device configuration method for distributed quasi-synchronous grid measurement system
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  • Grid management device configuration method for distributed quasi-synchronous grid measurement system

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Embodiment Construction

[0130] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The implementation method of the present invention is specifically as follows:

[0131] like figure 1 As shown, the distributed quasi-synchronous power grid measurement system applying the present invention is composed of a display analysis terminal and M power grid data collectors, where M is an integer and M≥1.

[0132] The M sets of power grid data collectors are distributed and installed at the key points of each single-phase line of the three-phase line on the low-voltage side of the substation, such as photovoltaic power generation grid-connected points, places with large loads, or places with more power electronic equipment. The grid data collector communicates with the display analysis terminal.

[0133] The display analysis terminal is connected to the output end of the low-voltage side of the distribution network transformer, and read...

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Abstract

A grid management device configuration method for a distributed quasi-synchronous grid measurement system comprises analyzing the characteristics of the power supply mode of the grid; calculating theload electric power corresponding to an over-standard voltage when the grid supplies power to the load, and the photovoltaic generated power corresponding to the over-standard voltage when the photovoltaic power is fed to the grid; calculating the best grid voltage level for the current season and the maximum configuration power of the grid management device; determining the capacity of the grid management device in consideration of the change that the loads use electricity at the same time according to seasons; and determining the number and locations of the grid management devices accordingto a line loss.

Description

technical field [0001] The invention relates to a method for configuring a power grid management device. Background technique [0002] With the application of a large number of power electronic devices and equipment, the harmonics of the power grid increase sharply. In the industrial grid environment, the power of equipment with different attributes changes rapidly. Due to the introduction of the national targeted poverty alleviation policy, new energy power generation has experienced explosive growth in the form of regions, which has brought serious quality problems to the fragile power grid-rural power grid. Due to the weak power supply capacity of the rural distribution network and the large line impedance, the single-phase load is basically the main load, and the distribution of power load is uneven. Especially when there is only grid power supply, there is a serious three-phase unbalanced state during the peak period of power consumption, which may easily cause a sing...

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Application Information

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IPC IPC(8): H02J3/38
CPCY02E10/56
Inventor 王哲王环陈卓王一波
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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