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Dynamic division method of distributed photovoltaic cluster based on power grid operation state perception

A distributed photovoltaic, state-aware technology, applied in photovoltaic power generation, single-grid parallel feeding arrangement, electrical components, etc., can solve the problems of small distributed photovoltaic single-unit capacity, strong output fluctuation, obvious delay, etc., to avoid Large-scale flow of reactive power, reasonable resources, and the effect of local consumption

Active Publication Date: 2021-03-19
SOUTHEAST UNIV
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Problems solved by technology

[0004] Purpose of the invention: In order to solve the above-mentioned problems such as small capacity of distributed photovoltaic stand-alone units, strong output fluctuation, poor controllability, obvious delay in centralized control mode, massive calculation, etc., divide distributed photovoltaics with similar characteristics into dynamic clusters to realize active power distribution Safe and Economical Operation of the Internet

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  • Dynamic division method of distributed photovoltaic cluster based on power grid operation state perception
  • Dynamic division method of distributed photovoltaic cluster based on power grid operation state perception
  • Dynamic division method of distributed photovoltaic cluster based on power grid operation state perception

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Embodiment Construction

[0037] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0038] The invention discloses a method for dynamic division of distributed photovoltaic clusters based on power grid operating state perception, which is characterized in that it includes the following steps:

[0039] 1) Based on the principle of local consumption and avoiding large-scale transfer of reactive power, the electrical distance is used as an indicator and then divided according to the size of the electrical distance and the location of the substation equipment, such as: substation, switching station, contact Switches and the like divide the power grid into multiple areas to achieve spatial decoupling of the power grid. When the network topology changes due to network failure or network reconfiguration, the power grid is re-zoned. The electrical distance can be defined as the equivalent impedance between two points, and the form...

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Abstract

The present invention discloses a power grid operation state perception-based distributed photovoltaic cluster dynamic division method, and belongs to the active power distribution network optimization regulation and control field. The method comprises the steps of on the basis of a static cluster of different voltage grades, when a network topology changes, regulating the power grid sub-regions;when the deviation of a photovoltaic output predicted value and an actual value is large, dynamically screening the distributed photovoltaic units participating in the cluster; when a power grid regulation and control target changes, dynamically dividing a distributed photovoltaic cluster with different division indexes and by utilizing a fuzzy clustering method. The method realizes the distributed photovoltaic cluster dynamic division adapting to the power grid operation state change, has the characteristics of being strong in flexibility and adaptability, etc., and lays the foundation for solving the obvious time delay of the centralized regulation and control and the mass calculation by utilizing a cluster mode.

Description

technical field [0001] The invention relates to a method for dynamic division of distributed photovoltaic clusters based on power grid operating state perception, and belongs to the field of active distribution network optimization and control. Background technique [0002] With the development of the global economy, the problems of energy shortage and environmental pollution are becoming more and more serious. Photovoltaic power generation has attracted extensive attention and developed rapidly due to its outstanding advantages such as abundant resources, wide distribution, cleanliness and pollution-free. However, photovoltaic output has the characteristics of intermittency, volatility, and uncertainty. Large-scale decentralized access has changed the distribution characteristics of unidirectional power flow, making power quality problems such as voltage fluctuations and voltage over-limits in distribution networks more serious. [0003] In view of the voltage limit problem...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/46
CPCH02J3/383H02J3/46H02J2203/20Y02E10/56
Inventor 窦晓波段向梅葛浦东吴在军胡敏强顾伟
Owner SOUTHEAST UNIV
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