Energy storage determination method and new energy support machine for increasing the adjustment capacity of new energy stations
A technology of regulation capability and new energy, applied in the direction of AC network load balancing, reducing/preventing power oscillation, AC network circuit, etc. Efficient effect
Active Publication Date: 2021-04-13
CHINA ELECTRIC POWER RES INST
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[0005] Aiming at the deficiencies of the prior art, the present invention provides an energy storage determination method and a new energy support machine to increase the adjustment capacity of new energy stations, so as to solve the problem of insufficient adjustment ability of new energy stations at present
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[0034] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings are not limiting of the present invention. In the figures, the same units / elements are given the same reference numerals.
[0035] Unless otherwise stated, the terms (including scientific and technical terms) used herein have the meanings commonly understood by those skilled in the art. In addition, it can be understood that the terms defined by commonly used dictionaries should be understood as having consistent meanings in the context of their related fields, and should not be understood as idealiz...
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The invention discloses an energy storage determination method for increasing the adjustment capability of a new energy station and a new energy support machine. The method includes: according to the obtained unbalanced power of the power grid at the initial moment of the adjustment process, the frequency deviation of the power system, the equivalent damping coefficient of the system, and the equivalent inertial time constant of the system, determine the dynamic frequency change of the power system during the adjustment process; The frequency dynamic variation of the power system during the process determines the active power reference value received by the energy storage device during the adjustment process; according to the active power reference value and the acquired adjustment process duration, determine the energy storage device that participates in the adjustment process. The total energy and the total energy released by the energy storage device; the capacity of the energy storage device is determined according to the maximum value of the total energy absorbed by the energy storage device and the maximum value of the total energy released by the energy storage device when participating in the adjustment process with different initial conditions. This method has a high coverage rate for the power grid operation profile; it has low demand for computing resources, high solution efficiency, and good accuracy.
Description
technical field [0001] The invention relates to the technical field of power system operation and control, in particular to an energy storage determination method and a new energy support machine for increasing the adjustment capability of a new energy station. Background technique [0002] On August 9, 2019, there was a major power outage in the UK. The process is roughly as follows: For some reason, the Little Barford gas-fired power station in the North Sea grid was shut down. After the gas-fired power station is disconnected from the grid, the power generation load lost by the grid reduces the frequency of the power system. On the other hand, due to the insufficient ability of the wind turbines in the North Sea Power Grid to withstand low frequencies, the reduction in the frequency of the power system caused a large number of wind turbines to go off-grid, so the output of the wind farm dropped sharply, which further increased the power generation load lost by the power ...
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IPC IPC(8): H02J3/24H02J3/28H02J3/38
CPCH02J3/28H02J3/381H02J3/241
Inventor 孙华东李文锋郭剑波张健郭强李志强赵兵魏巍
Owner CHINA ELECTRIC POWER RES INST