Low-voltage distributed photovoltaic access capacity optimization control method

A distributed photovoltaic and access capacity technology, applied in the direction of photovoltaic power generation, multi-phase network asymmetry reduction, multi-phase network elimination/reduction of asymmetry, etc., can solve problems such as excessive positive deviation of feeder line voltage, and achieve improvement The effect of power quality operation level and high engineering application value

Active Publication Date: 2018-12-07
ANHUI UNIVERSITY +3
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Problems solved by technology

[0007] The purpose of the present invention is to provide a low-voltage distributed photovoltaic access capacity optimization control method, to a certain extent solve the problem of the positive deviation of the feeder line voltage caused by the distributed photovoltaic access to the low-voltage station area, and improve the accessibility of photovoltaics in the station area. Input capacity, so that the station area has a higher voltage quality

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[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] An embodiment of the present invention provides a low-voltage distributed photovoltaic access capacity optimization control method, such as figure 1 As shown, it mainly includes:

[0026] Step 1. Set voltage constraints, harmonic constraints, three-phase voltage unbalance constraints and photovoltaic power generation constraints.

[0027] In the embodiment of the present invention, the set voltage constraints, harmonic constraints, three-ph...

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Abstract

The invention discloses a low-voltage distributed photovoltaic access capacity optimization control method. The method improves optimization control of photovoltaic access capacity through a controller and a capacity- regulating voltage-regulating transformer; and the method solves the problem of voltage positive deviation caused by poor photovoltaic absorption capacity in a transformer area to some extent, greatly improves low-voltage distributed photovoltaic access capacity of a low-voltage transformer area and reduces cost of power quality construction and reconstruction of the low-voltagetransformer area, and is widely suitable for distributed photovoltaic low-voltage transformer areas.

Description

technical field [0001] The invention relates to the technical field related to power quality control, in particular to a method for optimizing and controlling low-voltage distributed photovoltaic access capacity. Background technique [0002] With the country's strong support for new energy power generation and the vigorous implementation of photovoltaic poverty alleviation policies, my country has become the country with the fastest growth in photovoltaics for three consecutive years, especially the growth rate of medium and low voltage distributed photovoltaics is relatively high. While distributed photovoltaics have entered thousands of households, the power quality of low-voltage distribution networks has gradually deteriorated due to the access of distributed photovoltaics. Due to the different line parameters, power supply radius and distribution transformer capacity of different low-voltage station areas, the photovoltaic capacity that can be connected to the station ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/46H02J3/26
CPCH02J3/383H02J3/26H02J3/46H02J2203/20Y02E10/56Y02E40/50
Inventor 朱明星谢辉高博潘岩寇凌峰高敏吴鸣谢毓广陈凡徐斌丁津津汪玉王小明
Owner ANHUI UNIVERSITY
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