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Power grid voltage control method and system for new energy high-permeability region

A technology of grid voltage and control method, applied in the direction of single-grid parallel feeding arrangement, etc., can solve the problems of raising the bus voltage of the access substation, difficult to improve the capacity of new energy consumption, increasing the loss of equipment such as transformers and lines, etc. To achieve the effect of improving the consumption of new energy

Inactive Publication Date: 2020-04-10
NARI TECH CO LTD +1
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Problems solved by technology

A large amount of new energy is connected to the end of the power grid at all levels, and the power flow is reversed to increase the bus voltage of the connected substation. Especially during the high-generation period of new energy, voltage over-limits often occur, which limits the grid-connected consumption of new energy.
[0003] Voltage over-limit will not only lead to the protection action of the new energy power generation system to make it off-grid, but also cause the loss of equipment such as transformers and lines to increase
The current voltage control at the cost of reducing new energy power generation is difficult to improve the capacity of new energy consumption while ensuring the elimination of voltage over-limits

Method used

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  • Power grid voltage control method and system for new energy high-permeability region
  • Power grid voltage control method and system for new energy high-permeability region
  • Power grid voltage control method and system for new energy high-permeability region

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0043] Such as figure 1 As shown, a grid voltage control method in areas with high penetration of new energy includes the following steps:

[0044] Step 1. Obtain the parameters, measurement and constraint limits of the regional power grid; obtain the available status of reactive power equipment; obtain the future power forecast data of regional new energy stations.

[0045] Grid parameters include node number, node type, node voltage level, transformer resistance and reactance, capacitive reactor capacity, resistance, reactance and susceptance of each line, reference voltage and reference power. Power grid measurement includes active load and reactive load of each node, active power output by...

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Abstract

The invention discloses a power grid voltage control method for a new energy high-permeability region. The power grid voltage control method comprises the steps of obtaining the future power prediction data of a regional new energy station; and substituting the future power prediction data into a power grid optimization model with maximum new energy consumption and minimum network loss, and adjusting a reactive device and / or new energy, so that the future new energy active output meets the voltage control requirements. The invention further discloses a corresponding system. According to the invention, the future power prediction data is substituted into the power grid optimization model with the maximum new energy consumption and the minimum network loss, and by adjusting the reactive power device and / or the new energy, the future new energy active power output meets the voltage control requirement, and the new energy consumption is improved while the voltage is ensured not to exceed the limit.

Description

technical field [0001] The invention relates to a grid voltage control method and system in areas with high penetration of new energy sources, and belongs to the technical field of power system control. Background technique [0002] In recent years, both distributed new energy and centralized new energy have shown a rapid development trend. A high proportion of multi-voltage levels of regional power grids connected to new energy power generation has become the norm, which brings new challenges to the safe and stable operation of the power system. A large amount of new energy is connected to the end of the power grid at all levels, and the power flow is reversed to increase the bus voltage of the connected substation. Especially during the period of high generation of new energy, voltage violations often occur, which limits the grid-connected consumption of new energy. [0003] The voltage limit will not only lead to the protection action of the new energy power generation sy...

Claims

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Application Information

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IPC IPC(8): H02J3/46
CPCH02J3/46
Inventor 徐陆飞陈天华闪鑫陈建华杜磊熊正勇王永刚闭耀中许大卫
Owner NARI TECH CO LTD
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