Relay detection method for light storage hybrid inverter
A technology of hybrid inverter and detection method, applied in circuit breaker testing, instruments, measuring electricity and other directions, can solve the problems of leakage detection, false detection, etc.
Inactive Publication Date: 2019-03-19
EAST GRP CO LTD
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[0003] Based on this, it is necessary to provide a relay detection method for optical storage hybrid inverters in view of the existing detection methods and relay pull-in strategies that easily cause false detection or missing detection.
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[0067] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.
[0068] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" an...
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The invention provides a relay detection method for a light storage hybrid inverter. The relay detection method comprises the steps that the voltage between a second relay and fourth relay at the sideof an alternating-current network is detected; according to the detected voltage, it is judged whether or not the second relay and the fourth relay are normal; if yes, the voltage between a first relay and third relay at the side of the inverter is detected, and the second detection voltage is obtained; according to the second detection voltage, it is judged whether or not the first relay and thethird relay are normal; if yes, the voltage between a fifth relay and sixth relay at the side of load is detected, the third detection voltage is obtained; according to the third detection voltage, it is judged whether or not the fifth relay and the sixth relay are normal. The relay detection method for the light storage hybrid inverter has the advantages that the relay at the side of the alternating-current network, the relay at the side of the inverter and the relay at the side of the load are detected in sequence, the working status of each relay can be accurately detected according to corresponding judgment standards, and the reliability is improved.
Description
technical field [0001] The present application relates to the technical field of power electronics detection, and in particular to a relay detection method of a hybrid optical-storage inverter. Background technique [0002] At present, there are many relay failure detection methods for ordinary photovoltaic grid-connected inverters in the industry, but there are few publicized methods for solar-storage hybrid inverters. Photovoltaic-storage hybrid inverters are different from ordinary photovoltaic inverters. That is to say, if the load is increased at the inverter output end, another group of relays will be added. In this way, the entire device has 3 groups of 6 relays, and the possibility of failure due to their mutual combination has increased a lot. The existing detection methods and relay pull-in strategies are easy to cause false detection or missed detection. Contents of the invention [0003] Based on this, it is necessary to provide a relay detection method for a...
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CPCG01R31/3278
Inventor 陈波
Owner EAST GRP CO LTD