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Photovoltaic power station equivalent modeling method

A photovoltaic power station and equivalent modeling technology, applied in the field of efficiency modeling, can solve problems such as poor engineering applicability

Active Publication Date: 2016-06-22
HARBIN INST OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide an equivalent modeling method for photovoltaic power plants to solve the problem of poor engineering applicability of existing technologies

Method used

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Embodiment Construction

[0025] Embodiments of the photovoltaic power plant equivalent modeling method of the present invention will be described below in conjunction with the accompanying drawings.

[0026] figure 1 It is a flowchart of the equivalent modeling method for photovoltaic power plants of the present invention. Such as figure 1 As shown, the photovoltaic power plant equivalent modeling method may include the following steps:

[0027] S1, establishing a grid-connected simulation model of a single grid-connected photovoltaic power generation unit, wherein the grid-connected simulation model includes a transient control module for setting an active power recovery rate during fault recovery;

[0028] In this step, the photovoltaic power generation unit model may include a photovoltaic array, a DC confluence, a DC cable, an inverter and its first control system, an unloading circuit and its second control system, an AC filter circuit model, a booster Transformer model and AC collector line m...

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Abstract

The invention relates to a photovoltaic power station equivalent modeling method. The photovoltaic power station equivalent modeling method comprises the steps of building a simulation model of a grid-connected photovoltaic generation unit, including, a transient control module; carrying out a fault simulation experiment for the grid-connected photovoltaic generation unit, obtaining active power response curves in the presence of different voltage drop depths and different time of duration, and storing the active power response curves in the presence of different voltage drop depths and different time of duration into corresponding offline databases; selecting matched offline databases based on the really measured voltage drop depth and time of duration, selecting the active power response curves from the matched offline databases based on the output of the grid-connected photovoltaic generation unit, and clustering and grouping the selected active power response curves based on the active power response similarity when the transient control module is enabled so as to obtain multiple generator set groups; calculating a first equivalent parameter of each generator set group and a second equivalent parameter of a current collection circuit, and building an equivalent model based on the first equivalent parameters and the second equivalent parameter.

Description

technical field [0001] The invention relates to the technical field of power system simulation modeling, in particular to an equivalent modeling method for a photovoltaic power station. Background technique [0002] With the rapid development of photovoltaic power generation, the impact of large-scale photovoltaic grid connection on the power system has become increasingly prominent. Due to the randomness and intermittent characteristics of photovoltaic power generation, the grid connection of large-scale photovoltaic power plants will bring new challenges to the safe and stable operation of the power system. Therefore, it is necessary to establish a simulation model that can accurately reflect the output characteristics of photovoltaic power plants. In practical applications, there are a large number of photovoltaic power generation units in a photovoltaic power station and the operating conditions are different. If each photovoltaic power generation unit is modeled in deta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/38
CPCH02J3/00H02J3/383H02J2203/20Y02B10/10Y02E10/56
Inventor 樊世超李卫星金小明晁璞璞齐金玲
Owner HARBIN INST OF TECH
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