Solar cell simulator used for photovoltaic grid-connected inverter detection

Abstract

The invention relates to a middle-set-type intelligent high-voltage switch cabinet based on a field bus remote control technology. The middle-set-type intelligent high-voltage switch cabinet comprises a cabinet body, a cabinet door, a door opening sensor, a temperature sensor, a humidity sensor, a current sensor, a voltage sensor, an electric leakage protection sensor, a loudspeaker, a microphone, a video data collector and a field bus remote control device. The middle-set-type intelligent high-voltage switch cabinet has the advantages of high structural strength, good heat dissipation performance and good isolation performance among circuit members, and the operation stability of the circuit members in the switch cabinet is greatly improved; in addition, the operation condition data of circuit members in a power distribution cabinet can be collected at a long distance, instant information exchange and communication with onsite personnel of the switch cabinet can be carried out at a long distance, and all operations of the onsite personnel can be supervised and known, so that the scientificity and the accuracy of switch cabinet operation information collection and control are improved, and the operation stability and the management level of the switch cabinet are improved.

Description

technical field [0001] The invention relates to a solar cell simulator used for detection of photovoltaic grid-connected inverters, belonging to the technical field of photovoltaic power generation detection equipment. Background technique [0002] In the photovoltaic grid-connected power generation, the photovoltaic inverter is an important equipment to realize the grid-connected operation of photovoltaic power generation and AC power. Therefore, before the photovoltaic inverter leaves the factory, it is necessary to carry out detection of many items such as low frequency, overfrequency, overvoltage, and undervoltage. In addition to providing specific voltage, current and other electric energy output to meet the requirements of each test content, the testing equipment needs to be able to effectively control the power generation of photovoltaic power generation equipment according to the power generation characteristics of photovoltaic power generation equipment. Simulate va...

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Problems solved by technology

[0002] In the photovoltaic grid-connected power generation, the photovoltaic inverter is an important equipment to realize the grid-connected operation of photovoltaic power generation and AC power. Therefore, before the photovoltaic inverter leaves the factory, it is necessary to carry out detection of many items such as low frequency, overfrequency, overvoltage, and undervoltage. At present, when testing these items, it is necessary for the testing equipment to not only provide specific voltage, current and other electric energy output to meet the various testing contents, but also need to be able to effectively control the photovoltaic power generation in accordance with the power generation characteristics of the photovoltaic power generation equipment. Simulate various operating conditions that exist to improve the detection accuracy of photovoltaic inverters. However, the power supply of photovoltaic inverter detection equipment currently used is often directly rectified and converted from alternating current to direct current for driving or directly driven by The DC power supply is used to drive the detection equipment to run. Although such a power supply equipment can meet the power output required by various testing items, it cannot effectively simulate the specific operation of the photovoltaic power generation system. Therefore, the detection data of the photovoltaic inverter There is a large deviation from the actual use, and it cannot effectively meet the needs of photovoltaic inverter testing equipment. At the same time, when performing various data testing on photovoltaic inverters, the testing equipment often consumes a lot of power. The power supply and detection system of various testing equipment currently used do not have the ability to recover and utilize the electric energy after the testing operation, thus causing a huge loss of electric energy and greatly increasing the operating cost of the photovoltaic inverter testing work. In response to this situation, it is urgent to develop a solar cell simulation power supply for photovoltaic inverter detection with high simulation and low energy consumption to meet the needs of actual use.

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