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Power-grid electric energy quality regulation method

A power quality and power grid technology, applied in the field of new energy power generation, can solve the problems that new energy cannot be connected to the grid, energy waste, grid instability, etc., and achieve good power generation efficiency.

Inactive Publication Date: 2018-08-10
赵高琳
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Due to the intermittence and instability of wind power and photovoltaic itself, it will bring harmonics, resulting in the instability of the power grid. As a result, a large number of new energy sources cannot be well connected to the power grid, resulting in energy waste.

Method used

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Embodiment Construction

[0023] The application will be described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific embodiments are only used to further illustrate the application, and cannot be interpreted as limiting the protection scope of the application. The above application content makes some non-essential improvements and adjustments to this application.

[0024] Such as figure 1 As shown, this application proposes a method for regulating the power quality of the power grid, including the following steps: (1) Detecting the wind volume and the amount of light, determining the wind force coefficient according to the air volume, and determining the light coefficient according to the light amount; (2) Predicting the demand current of the power grid , calculate the number of input wind turbines and the number of photovoltaic cells according to the predicted grid demand current; (3) calculate the harmonic current according...

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Abstract

The invention relates to a power-grid electric energy quality regulation method. The method comprises the following steps that (1) the air quantity and the illumination quantity are detected, a wind power coefficient is determined according to the air quantity, and an illumination coefficient is determined according to the illumination quantity; (2) the needed current magnitude of the power grid is predicted, and the number of used aerogenerators and the number of photovoltaic cells are calculated according to the predicted current magnitude needed by the power grid; (3) according to the determined number of the aerogenerators and the number of photovoltaic cells, a harmonic current is calculated; and (4) the calculated harmonic current is compared with a harmonic wave threshold, and a harmonic wave compensation device is triggered according to the comparison result. According to the method, harmonic waves of new-energy power generation can be treated rapidly, stable operation of the power grid is maintained, and the electric energy quality is improved.

Description

technical field [0001] The application belongs to the technical field of new energy power generation, and in particular relates to a method for regulating and controlling power quality of a grid. Background technique [0002] The power quality monitoring system is an important means to discover and evaluate power quality problems in time. With the massive grid-connection of large-scale intermittent new energy represented by wind power and photovoltaics, and the wide application of loads such as high-speed rail, rail transit, and electric vehicles characterized by power electronic control technology, coupled with traditional large-scale electric furnaces and steelmaking furnaces, The development momentum of impact load is unabated, and a large number of power quality disturbance sources have directly or indirectly affected the safe and reliable operation of the distribution network. In order to meet the requirements of the development of smart grids under the new situation a...

Claims

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Application Information

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IPC IPC(8): H02J3/01H02J3/46H02J3/38
CPCH02J3/01H02J3/383H02J3/386H02J3/46H02J2203/20Y02E10/56Y02E10/76Y02E40/40
Inventor 赵高琳
Owner 赵高琳
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