Self-adaptive control method and device for rotational inertia of double-high-characteristic power system
A technology of adaptive control and moment of inertia, applied in circuit devices, electrical components, AC network circuits, etc., can solve problems such as losses, large maximum deviation of grid frequency, insufficient system inertia, etc., and achieve the effect of improving safe and stable operation capabilities
Pending Publication Date: 2021-12-31
STATE GRID TIANJIN ELECTRIC POWER +1
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Problems solved by technology
[0003] Inertia can slow down the system frequency change during the blocking period and buy time for the first frequency adjustment of the power grid. However, due to the low inertia of the new power system itself with the "double high" feature, when frequency fluctuations occur, not only the frequency changes quickly, but also the maximum deviation of the grid frequency The value is also larger, and there is a greater probability of triggering the system protection mechanism. In severe cases, it will cause a blackout. Insufficient inertia of the system due to energy access
In addition, because some users have high requirements on power supply quality and strict requirements on power supply frequency, the fluctuation of power grid frequency will cause huge losses to them
Method used
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Embodiment 2
[0079] The second embodiment of the present invention provides a two-high feature power system rotation inertia adaptive control device, including:
[0080] Inertial support acquisition module: Used to acquire the inertia support of the power system based on the charged state of the energy storage element.
[0081] The beneficial effect of the present invention is:
[0082] 1. In consideration of the rotational inertia assessment and inertial adaptive control of "Double High" feature new power system, the inertial support is provided by the system inertia assessment and utilization adaptive control for different oscillation frequencies in the system, and the "double high" grid is improved. Run stability.
[0083] 2 Can use life.
[0084] 3. The adaptive control proposed by this method fully considers the frequency change speed and frequency change degree of the system. On the one hand, the index function of the system frequency change rate is the core, combined with the adjustment...
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The invention provides a self-adaptive control method and device for the rotational inertia of a double-high-characteristic power system, and relates to the technical field of wind power, and the method comprises the steps: obtaining the charge state of an energy storage element, and obtaining the inertial support of the power system based on the charge state of the energy storage element; through the method provided by the invention, estimation of inertia level space-time characteristics in the inertia response process of the system can be realized, and then inertia support response coordination of each part of the system is adjusted, so that various stability constraint conditions are met, and the safe and stable operation capability of the system is improved.
Description
Technical field [0001] The present invention relates to the technical field of new energy power generation, and more particularly to a two-high feature power system rotation inertia adaptive control method device. Background technique [0002] my country's power grid has gradually formed "double high" characteristics containing high proportion of renewable energy and high proportional power electronic equipment, compared to traditional power grids supplied by synchronous generators, mostly due to most new energy in the "double high" power system The power electronic device such as the network inverter is connected to the grid, but itself cannot provide rotation inertability as a synchronous generator, reverse as its proportional increases lower system inertia. In this case, the system will become more sensitive to the fluctuations of the disturbance, and the stable operation of the system is severely threatened. [0003] Inertia can slow down the system frequency change of the bl...
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IPC IPC(8): H02J3/24H02J3/00
CPCH02J3/241H02J3/002H02J3/24H02J2203/10
Inventor 宣文博李慧张德政刘忠义王伟臣罗涛闫大威刘聪雷铮宋佳钱广超何平
Owner STATE GRID TIANJIN ELECTRIC POWER