System and method for detecting and controlling voltage collapse condition

A voltage collapse and status technology, applied in the system field, can solve problems such as output voltage out of control, unstable voltage working range, voltage collapse, etc.

Active Publication Date: 2014-11-12
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, when the power grid connected to the energy conversion system is a weak power grid or an extremely weak power grid, the energy conversion system has an unstable voltage operating range during normal operation, and reactive power is performed in this unstable voltage range When the power is adjusted, it may cause the output voltage to run out of control, or cause the voltage collapse condition (Voltage collapse condition) to occur

Method used

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  • System and method for detecting and controlling voltage collapse condition
  • System and method for detecting and controlling voltage collapse condition
  • System and method for detecting and controlling voltage collapse condition

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Embodiment Construction

[0045] One or more embodiments disclosed herein relate to energy conversion systems, or more specifically energy generation systems, and in particular, to detecting at least one voltage collapse condition associated with the operation of an energy conversion system, and when at least one One or more measures to be taken in case of voltage collapse. The voltage collapse condition may be caused by the weak grid connected to the energy conversion system when it is running. The so-called "voltage collapse condition" here is an error or failure operating state of the energy conversion system, and in such an error or failure operating state, when executing a specific control algorithm to regulate the output voltage, such as trying to increase the output without When the output voltage is increased by using the power, it will actually cause the output voltage to decrease, thus, similar to a positive feedback process, the output voltage will suddenly decrease or collapse rapidly after...

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Abstract

The invention discloses an energy conversion system. The energy conversion system 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 which comprises active power and reactive power. The converter controller is connected with the converter device, and is used for adjusting the active power and the reactive power output by the converter device. The converter controller comprises a voltage collapse detecting module which is used for detecting whether at least one voltage collapse condition exists or not when the energy conversion system runs. The invention further discloses the converter controller, a voltage collapse condition detecting device and method, and a photovoltaic energy conversion system.

Description

technical field [0001] Embodiments disclosed in the present invention relate to systems and methods, and in particular to a system and method that can be used to detect voltage collapse conditions. Background technique [0002] Energy conversion systems, including photovoltaic power generation devices, wind power generation devices, etc., are gradually being developed to replace traditional power generation devices, such as those based on fossil fuels. At least some known energy conversion systems are configured for grid connection, which can convert energy obtained from, for example, renewable energy sources, etc., into energy that meets grid requirements, such as having a specific voltage and frequency, etc. energy is fed into the grid. Usually, one of the characteristics or functions that such an energy conversion system needs to have is to be able to provide reactive power support to the grid, because the stability of the grid voltage can be maintained by real-time cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/12G01R31/00
CPCY02E10/56
Inventor 侯丹邬心慧谭卓辉邬雪琴刘娇史经奎
Owner GENERAL ELECTRIC CO
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