Photovoltaic solar one-stop grid-connected detection system
A photovoltaic solar energy and detection system technology, applied in the electric power field, can solve problems such as prolonging the detection cycle, difficult grid-connected detection of photovoltaic power stations, increased detection costs, etc., to achieve the effect of verifying grid-connected performance
Active Publication Date: 2014-10-15
STATE GRID CORP OF CHINA +1
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Problems solved by technology
[0003] At present, domestic and foreign testing work on grid-connected photovoltaics is mainly aimed at the individual testing of a single technical index. It is difficult to complete all the grid-connected testing of a photovoltaic power station at one time, which increases testing costs and prolongs the testing cycle.
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[0043] Such as figure 1 As shown, the present invention provides a photovoltaic solar energy one-stop grid-connected detection system. During the test, the detection system is connected in series between the grid-connected inverter and the step-up transformer, and the equipment is powered on through the switch S1, and S2 and S3 are respectively For the bypass switch of the voltage drop device and the grid disturbance device, it is enough to disconnect the corresponding bypass switch during the test, and the adjustable load RLC is connected to the system through the switch S4.
[0044] The invention can complete the voltage / frequency response characteristics, anti-islanding protection characteristics, power output characteristics, active / reactive power control capability, low voltage ride-through capability and power quality test of the photovoltaic power station at one time, so as to verify the grid-connected performance of the photovoltaic power station the goal of. The main...
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The invention belongs to the technical field of power, and especially relates to a photovoltaic solar one-stop grid-connected detection system. In particular, the detection system is a response ability detection system of a photovoltaic power station in normal operation or with power grid abnormalities. The detection system is designed for grid-connected ability tests, which are required by China, of the photovoltaic power station. According to the invention, the detection system is connected in series between a grid-connected inverter and a step-up transformer; a device is powered by a switch S1; S2 and S3 are respectively bypass switches of a voltage dropping device and a power grid disturbance device; when the test is carried out, a corresponding bypass switch is disconnected, and an adjustable load RLC accesses the system through a switch S4; the device can be used to complete all grid-connected detection contents of the photovoltaic power station and a power generation system; tests of voltage / frequency response characteristics, anti-islanding protection characteristics, power output characteristics, active / reactive power control ability, low voltage ride through ability, power quality and the like of the photovoltaic power station can be completed at a time; and the grid-connected performance of the photovoltaic power station is verified.
Description
technical field [0001] The invention belongs to the field of electric power technology, and in particular relates to a one-stop grid-connected detection system for photovoltaic solar energy, specifically a detection system for the response capability of a photovoltaic power station when it is in normal operation or when the power grid is abnormal, and is a photovoltaic power station for national requirements A detection system designed for grid-connected capability testing. Background technique [0002] In view of the current situation that domestic solar photovoltaic power stations are widely connected to the power grid, in order to promote the coordinated development of solar power generation and power grids, the State Grid Corporation of China has issued the latest "Technical Regulations for Connecting Photovoltaic Power Stations to Power Systems" and "Technology for Connecting Photovoltaic Power Generation Systems to Distribution Networks". "Regulations", the regulations...
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IPC IPC(8): G01R31/00
Inventor 谢赐戬王刚戈阳阳李胜辉赵清松张冠锋
Owner STATE GRID CORP OF CHINA