Active power reduction calculation method for suppressing photovoltaic access point voltage limit exceeding

A technology of active power and voltage over-limit, applied in the field of active power reduction calculation, it can solve the problems of access point voltage over-limit and no calculation method for photovoltaic active power, so as to reduce pressure and facilitate online real-time application and calculation easy effect

Active Publication Date: 2017-07-21
SHANDONG UNIV OF TECH
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Problems solved by technology

[0007] However, there is still no simple calculation method for the reduction of photovoltaic active power. In view of this, in order to solve the problem of voltage limit at the access point caused by the connection of photovoltaic power stations, the present invention proposes a simple method for calculating the reduction of photovoltaic active power method

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  • Active power reduction calculation method for suppressing photovoltaic access point voltage limit exceeding
  • Active power reduction calculation method for suppressing photovoltaic access point voltage limit exceeding
  • Active power reduction calculation method for suppressing photovoltaic access point voltage limit exceeding

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Embodiment Construction

[0043] In order to clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific implementation modes and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted herein to avoid unnecessarily limiting the...

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Abstract

The invention discloses an active power reduction calculation method for suppressing photovoltaic access point voltage limit exceeding. Firstly, the voltage of a photovoltaic power station access point and the voltage of a main transformer low-voltage bus are monitored in real time, and when the voltage of the access point exceeds an upper limit and a photovoltaic active power reduction condition is met, the active power reduction is calculated, and photovoltaic output is adjusted according to a calculation result. The invention provides a distributed photovoltaic active power reduction calculation method for eliminating access point voltage upper limit exceeding caused by distributed photovoltaics, the calculation formula is simple, the calculation amount is small, massive data transmission of the communication system is not needed, the real-time applicability is high, a strong theoretical basis and a control method are provided for suppressing voltage upper limit exceeding of the access point caused by the distributed photovoltaic access, and the method is applicable to a voltage control condition for the voltage upper limit exceeding caused after distributed photovoltaic access.

Description

technical field [0001] The invention relates to a method for calculating the amount of active power reduction for suppressing voltage violation of a photovoltaic access point, and belongs to the technical field of photovoltaic power generation control. Background technique [0002] At present, distributed photovoltaic power plants are widely connected to the distribution network, which causes the voltage distribution of the distribution line to change. The connection of high-permeability photovoltaic power generation can easily cause the voltage of the distribution network to rise, and it is very easy for the voltage to exceed the upper limit. . Facing the problem of voltage exceeding the limit, many literatures have mentioned that the reduction of photovoltaic active power is the most effective means to suppress the voltage rise. Considering economic factors, it is usually used as the last line of defense to eliminate the voltage exceeding the limit. [0003] At present, t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/48H02J3/38
CPCH02J3/383H02J3/48Y02E10/56
Inventor 王蕾咸日常徐丙垠刘洋彭克钱昆
Owner SHANDONG UNIV OF TECH
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