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Converter controller, energy conversion system, photovoltaic energy conversion system and method

An energy conversion system, converter controller technology, applied in photovoltaic power generation, measurement of electrical variables, rate of change measurement, etc., can solve problems such as inability to detect island conditions, non-detection areas, etc.

Active Publication Date: 2013-09-25
GENERAL ELECTRIC CO
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Problems solved by technology

However, both of the above two detection methods have the problem of Non-Detection Zone (NDZ)
The non-detection area generally occurs when there is a match between the power generation system and the load, and when the match reaches a certain level, the islanding condition cannot be detected by either the active detection method or the passive detection method

Method used

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  • Converter controller, energy conversion system, photovoltaic energy conversion system and method
  • Converter controller, energy conversion system, photovoltaic energy conversion system and method
  • Converter controller, energy conversion system, photovoltaic energy conversion system and method

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Embodiment Construction

[0048]One or more embodiments disclosed in the present invention relate to an energy conversion system, in particular to an active islanding detection method and an energy conversion system capable of implementing the active islanding detection method, so as to detect and protect islanding conditions. The so-called "active island detection method" here refers to intentionally or artificially introducing or injecting a small disturbance into the control structure of the system to break the balance of the system and force one or more of the output terminals of the energy conversion system to The target electrical parameters are changed, so as to discover or detect the islanding operation status of the system, and provide protection for the system and the load. Further, on the basis of the active islanding detection method, the present invention proposes an "islanding disturbance compensation mechanism" or "islanding disturbance compensation algorithm" or "islanding disturbance co...

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Abstract

The invention discloses an energy conversion system which comprises a converter device and a converter controller. The converter device is used for converting input energy provided by an energy source into output energy, and the converter controller is used for adjusting the active component and the reactive component of the output energy. The converter controller comprises an island protection module which is used for receiving electrical parameter values detected by the output end of the converter device, generating island disturbing signals and disturbing compensating signals at least according to the measured electrical parameter values, and acting the island disturbing signals and the disturbing compensating signals to be used for adjusting one or both of the active component and the reactive component of the output energy, and therefore the measured electrical parameter values can be moved outside a normal range when an island condition happens.

Description

technical field [0001] The embodiments disclosed in the present invention relate to an energy conversion system and method, in particular to a system and method for detecting an islanding condition of the energy conversion system. Background technique [0002] Power generation systems, especially distributed power generation systems (such as photovoltaic power generation systems and wind power systems, etc.), have so-called "island" operating conditions, which means that after the distributed power generation system is disconnected from the main grid, it still continues to operate. Provides electrical energy to a part of the electrical system. A power generation system operating in an "island" situation raises some safety concerns. One concern is that when the grid is lost or disconnected, personnel dispatched to make safety repairs may suffer safety compromise if they do not realize that the part they are repairing is still receiving power from the generating system. Anot...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/18H02N6/00G01R19/00G01R19/12G01R23/02
CPCH02J3/18H02J3/38H02J3/388Y02E10/56Y02E40/30
Inventor 公茂忠谭卓辉刘云峰邬雪琴朱慧斌大卫.史密斯
Owner GENERAL ELECTRIC CO
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