A power grid frequency disturbance source location method for dispatching master station
A technology of disturbance source location and power grid frequency, applied in the direction of reducing/preventing power oscillation, etc., can solve problems such as affecting the normal operation of the power grid and hidden dangers of power grid security.
Active Publication Date: 2022-07-22
NR ELECTRIC CO LTD +2
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[0002] During the operation of the power grid, system failure (test) or DC unblocking, new energy output or large user load fluctuations, and power plant output fluctuations will all cause system frequency fluctuations. The first two types of factors can be known in advance or easily discovered, while power plant output fluctuations It often takes a lot of analysis after the event to be discovered. If it is not discovered in time, it may cause hidden dangers to the safety of the power grid and affect the normal operation of the power grid. Therefore, when the frequency disturbance is caused by the output fluctuation of the power plant, quickly and effectively locating the disturbance source of the power plant is very important to the dispatcher. It is of great significance, but there are many power plants and units in the power grid, it is difficult for the dispatcher to quickly find out the disturbance source, and it is impossible to take further measures to eliminate the fluctuation in time
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[0018] The technical solutions and beneficial effects of the present invention will be described in detail below with reference to the accompanying drawings.
[0019] like figure 1 As shown, the present invention provides a grid frequency disturbance source location method oriented to the dispatch master station, comprising the following steps:
[0020] A: Use the existing WAMS data acquisition system to obtain the system frequency and power of the power plant units in the whole area, and form a system frequency and power plant unit power parameter library. The data collected by WAMS needs to be acquired through the data interface, and the system frequency is the unified frequency in the power grid. , the power of the power plant units comes from the units under all power plants in the system collected by the PMU, and the data are real-time data at the millisecond level;
[0021] B: According to the system frequency data obtained in step A, determine the analysis time window ...
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The invention discloses a method for locating a power grid frequency disturbance source oriented to a dispatching master station. The prony algorithm is used to identify the system frequency to obtain the dominant mode disturbance frequency, disturbance amplitude, damping ratio, and then determine whether the system has frequency disturbance; if frequency disturbance occurs, obtain the correlation between the system frequency and the power data trend of each unit Based on the correlation, determine the boosting attribute of the power of the unit to the system frequency. On the premise of the boosting attribute, the unit or group of units that cause disturbance to the system frequency is determined through the correlation ranking, so as to determine the source of the disturbance. This method can quickly and effectively locate the disturbance source of the power plant, specific to the unit, and provide decision-making assistance for the dispatcher's next action to ensure the normal and safe operation of the power grid.
Description
technical field [0001] The invention belongs to the technical field of power system security and stability monitoring, relates to frequency fluctuation monitoring based on WAMS, and particularly relates to a grid frequency disturbance source positioning method oriented to a dispatch master station. Background technique [0002] During the operation of the power grid, system failures (tests) or DC unlocking, new energy output or large user load fluctuations, and power plant output fluctuations will all cause system frequency fluctuations. It often takes a lot of analysis after the event to be discovered. If it is not found in time, it may cause hidden dangers to the power grid and affect the normal operation of the power grid. Therefore, when the frequency disturbance is caused by the output fluctuation of the power plant, the source of the power plant disturbance can be quickly and effectively located. It is of great significance, and there are a large number of power plants...
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IPC IPC(8): H02J3/24
CPCH02J3/24
Inventor 袁飞飞张孝施雄华范磊
Owner NR ELECTRIC CO LTD