A method for setting frequency deviation coefficient in power grid control area
A technology of frequency deviation and control area, which is applied in the field of frequency deviation coefficient setting in the power grid control area
Active Publication Date: 2020-09-08
NORTHWEST BRANCH OF STATE GRID POWER GRID CO
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Problems solved by technology
[0005] The purpose of the present invention is to provide a method for calculating and setting the frequency deviation coefficient in the control area of the power grid to solve the shortcomings of the existing technology; the method can be adaptively adjusted according to the operation mode of the power grid, and is easy to implement based on the current level of automation technology, and can reasonably share the frequency regulation of the system Responsibility, accurately reflect the real frequency characteristics of the grid control area, and effectively increase the quality of grid frequency
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Embodiment Construction
[0022] The present invention is described in further detail below in conjunction with accompanying drawing:
[0023] see figure 1 As shown, in order to make up for the shortcomings of the existing measurement methods, the present invention proposes an adaptive frequency deviation coefficient algorithm with additional weights. According to the average value of wind power and photovoltaic in the recent period to determine the wind speed and photovoltaic size, the apportionment ratio of the frequency deviation coefficient is corrected on a 30-minute cycle. The introduction of this algorithm makes it possible for the adaptive grid operation mode to accurately track the change of the grid frequency deviation coefficient.
[0024] Taking 30 minutes as a cycle avoids frequent parameter changes on the one hand and fully considers the current level of automation technology on the other hand, which is easy to implement.
[0025] The formula for calculating the apportionment ratio of th...
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The invention discloses a method for setting a frequency bias coefficient of the power grid control area. The method comprises steps that S1 of data acquisition, actual outputs of a hydroelectric generating set, a thermal power generating set, a wind power generating set and a photovoltaic generating set are collected; S2, the frequency bias coefficient of the control area is calculated through utilizing the frequency bias coefficient allocation proportion algorithm of the adaptive additional weight according to the collected data, and high, medium and low wind speeds and the photovoltaic sizeare automatically identified during calculation. The frequency bias coefficient setting method of the adaptive additional weight is employed, according to the proportions of the hydropower, thermal power, wind power and photovoltaic units and the outputs in the power grid control area, wind power and photovoltaic frequency response characteristics and the actual frequency modulation capability ofthe hydroelectric and thermal power units are comprehensively considered, according to the true frequency bias response characteristics of the control area, the frequency bias coefficient of the control area is calculated and set in real time, so frequency modulation tasks can be more scientifically distributed to different control areas, and real-time measurement data are employed to verify thatthe new frequency bias coefficient setting method is fully operational.
Description
technical field [0001] The invention relates to a method for setting a frequency deviation coefficient in a power grid control area, in particular to a method for setting a frequency deviation coefficient in a power grid control area where tie-line frequency deviation control is adopted and new energy units are connected on a large scale. Background technique [0002] At present, in the interconnected power grid, the grid control area generally adopts a certain active power control mode, including fixed tie line control (FTC), fixed frequency control (FFC), and tie line frequency deviation control (TBC). The deviation (ACE) determines the adjustment amount, and the frequency deviation coefficient B is used as a key parameter to determine the ACE. Whether the parameter value setting is reasonable or not directly affects the quality of the frequency control effect. An inaccurate setting of the B coefficient will lead to the automatic generation control (AGC) adjustment variabl...
Claims
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IPC IPC(8): H02J3/00H02J3/24
CPCH02J3/00H02J3/24H02J2203/20
Inventor 任冲孙骁强牛拴保段乃欣柯贤波程林王智伟任龙飞王世杰
Owner NORTHWEST BRANCH OF STATE GRID POWER GRID CO