Photovoltaic area reactive power coordination control method considering reactive power output capability of photovoltaic power station
A photovoltaic power station, coordinated control technology, applied in the direction of reactive power adjustment/elimination/compensation, photovoltaic power generation, reactive power compensation, etc., can solve the problem of less research on photovoltaic grid-connected voltage control
Active Publication Date: 2021-05-14
国网内蒙古东部电力有限公司通辽供电公司 +1
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At this stage, there are few studies on photovoltaic grid-connected voltage control based on the voltage support capacity of compensation points, and most of them are based on the analysis of the reactive power adjustment capacity of a certain type of device. Coordinated control among compensating devices
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[0050]Aiming at the problem of voltage stability in photovoltaic grid-connected areas, the invention studies a reactive power control method for photovoltaic power stations participating in voltage regulation of grid-connected points. This method aims to control the voltage stability of the grid-connected point in the photovoltaic access area. First, the reactive power demand of photovoltaic grid-connected is analyzed, and the reactive power and voltage regulation ability of the photovoltaic power station is evaluated by using the reactive power / voltage sensitivity analysis method; Then, based on the principle of making full use of the reactive power adjustment capabilities of each reactive power compensation device, the reactive power coordination control of the multi-compensation devices with the participation of photovoltaic power plants is carried out, and finally the support for the grid-connected point voltage is realized.
[0051] The steps of the present invention are: ...
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The invention discloses a photovoltaic area reactive power coordination control method considering the reactive power output capacity of a photovoltaic power station, and belongs to the technical field of power system analysis, operation and control. The invention aims to provide a photovoltaic region reactive power coordination control method considering the reactive power output capability of a photovoltaic power station, which is used for carrying out reactive power coordination control on multiple compensation devices in which the photovoltaic power station participates according to the principle of fully utilizing the reactive power regulation capability of each reactive power compensation device, and finally realizing the voltage support of a grid-connected point. The method comprises the following steps: calculating the reactive power demand of photovoltaic grid connection and comprehensive information voltage / reactive power sensitivity, evaluating the reactive power supporting capability of a photovoltaic system, and sending corresponding action instructions to each adjusting device according to a reactive power control strategy. According to the invention, coordination control is carried out through the devices with reactive power regulation capability in the research area to maintain the voltage stability of the grid-connected point, the regulation capability of each device needs to be fully explored during control, and unnecessary network loss caused by excessive reactive power transmission also needs to be avoided.
Description
technical field [0001] The invention belongs to the technical field of power system analysis, operation and control. Background technique [0002] In recent years, the problem of energy shortage and natural environment pollution has become more and more serious. Vigorously developing green energy is an effective way to alleviate this problem. With the continuous reduction of photovoltaic power generation costs and the increasingly mature grid-connected technology, it has become more and more popular as an important form of clean energy. Pay attention to. Large-scale photovoltaic power stations are mostly built in desert areas, where the local load is small, and the electric energy needs to be sent out through long-distance lines. The power grid is relatively weak, which can easily lead to voltage fluctuations at the grid-connected point, and requires a certain amount of reactive power support. In addition, after the large-scale photovoltaic power station is connected to the...
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IPC IPC(8): H02J3/38H02J3/18H02J3/24
CPCH02J3/381H02J3/18H02J3/24H02J2300/24Y02E40/30Y02E10/56
Inventor 李赫李继东葛津铭王振浩岳志国滕云飞谭为先
Owner 国网内蒙古东部电力有限公司通辽供电公司