Non-isolated DC-DC converter assembly

A technology of DC converters and converters, applied in the direction of conversion of DC power input to DC power output, output power conversion equipment, conversion equipment without intermediate conversion to AC, etc., can solve the problem of pulsating current, DC-DC converter The output voltage cannot be adjusted, reducing system availability and other problems, so as to avoid EMI problems, large volume and cost, and high cost

CN102055316AInactive Publication Date: 2011-05-11ABB RES LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2011-05-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a solar power station comprising a non-isolated DC-DC converter assembly, and the non-isolated DC-DC converter assembly comprises a boost converter and a converter connected together in a specific way.
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Description

technical field

[0001] The present invention relates to a non-isolated direct current-direct current (DC-DC) converter assembly. More specifically, the present invention relates to a non-isolated DC-DC converter assembly suitable for use with photovoltaic cell components. Background technique

[0002] Two main types of photovoltaic inverters can be found today, isolated and non-isolated photovoltaic inverters. Due to galvanic isolation, the first category of photovoltaic inverters allows grounding of the photovoltaic panel terminals, which is mandatory in some countries due to safety concerns related to leakage currents. Grounding the negative photovoltaic panel terminal is also advantageous because it mitigates photovoltaic panel degradation problems. Even in countries where galvanic isolation is not mandatory, the presence of a transformer is necessary when using some specific photovoltaic cell technologies such as thin film. However, when this additional element, ie th...

Examples

Embodiment Construction

[0016] figure 1 A conventional boost converter suitable for boosting an input voltage to a higher output voltage is shown. The boost converter includes an inductor L 1 ’, diode D 1 ’ and the controllable switch S 1 '. The boost converter has a first input terminal BCI 1 ’, the second input terminal BCI 2 ', the first output terminal BCO 1 ’ and the second output terminal BCO 2 '. Input DC voltage through the first input terminal BCI 1 ’ and the second input terminal BCI 2 'enter. First input terminal BCI 1 ’ is the positive terminal while the second input terminal BCI 2 ’ is the negative terminal. The output voltage appears at the first output terminal BCO 1 ’ and the second output terminal BCO 2 ’, the first output terminal BCO 1 ’ is the positive terminal while the second output terminal BCO 2 ’ is the negative terminal.

[0017] Inductor L 1 ’ and the diode D 1 ’ connected in series at the first input terminal BCI of the boost converter 1 ’ and the firs...