Power control method for hydropower station including energy storage primary frequency modulation system

Abstract

A power control method for a hydropower station including an energy storage primary frequency modulation system comprises the following steps of coupling an FM output of the energy storage primary frequency modulation system with a fixed value adjustment system and a unit primary frequency modulation system; and coupling an energy storage input of the energy storage primary frequency modulation system with the fixed value adjustment system. The power control method optimizes the original active power control strategy of the hydropower station to make it possible to be compatible with the energy storage primary frequency modulation system, which avoids conflicts of various power control and regulation systems of the hydropower station during the adjustment process, thereby maximizing the upgrading of the power regulation performance of the hydropower station.

Description

technical field [0001] The invention relates to the technical field of automatic control of hydropower generating sets and power system stability control, in particular to a power control method of a hydropower station including an energy storage primary frequency modulation system. Background technique [0002] The functional modules responsible for active power regulation in the power station include: fixed value regulation system and primary frequency regulation system, the former mainly adjusts the output power of the power station and the unit according to the dispatching secondary frequency regulation command, the change of the planned load curve, and the operator's operation command; the latter The other is to adjust the output power of the unit after the grid frequency deviates from the rated frequency and exceeds the threshold of the primary frequency regulation. Before the secondary frequency regulation takes effect, the range of the grid frequency deviation from th...

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Problems solved by technology

[0010] Document 5 "A Device and Method for Responding to Primary and Secondary Frequency Modulation of Thermal Power Combined Energy Storage" (CN108539764A) discloses a device and method for thermal power combined energy storage to respond to primary and secondary frequency modulation, but there are several problems: 1) The cooperation method between the energy storage system and the primary power regulation system of thermal power is not given; 2) The quantitative calculation method of the respective output power of several regulation systems is not given; 3) There are confusion problems in basic definitions, such as explaining the automatic generation control ( AGC, Automatic Generation Control), mistakenly used the definition description of automatic gain control (AGC, Automatic GainControl)

Therefore, after the primary frequency regulation system of the hydropower station is newly added, how to modify the original fixed value regulation strategy and the primary frequency regulation strategy, so that the newly added primary frequency regulation system of the energy storage is seamlessly compatible with the original power regulation system of the hydropower station, and avoids both Conflicts occur during the power regulation process, and it is still a problem to be solved to solve the power compensation problem of the energy storage primary frequency regulation system when the energy storage is input, so as to maximize the power regulation performance of the hydropower station

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