High-speed and low-speed frequency modulation resource coordination control method considering energy storage system SOC

Abstract

The invention discloses a high-speed and low-speed frequency modulation resource coordination control method considering energy storage system SOC. The control method comprises the steps of establishing a main control region in an AGC system; establishing a generator set and an energy storage system control model in the main control region, and dividing a high-speed frequency modulation group anda low-speed frequency modulation group; obtaining real-time measurement data from an SCADA system; calculating control deviation of an original region; calculating a high-speed frequency modulation resource energy storage system control instruction according to the original ACE and by considering the energy storage system SOC and the maximum allowable charging / discharging power; performing correction and filtering processing on an ACE control signal in the low-speed frequency modulation group, and calculating the regulation requirement of the low-speed frequency modulation group; generating control instructions of respective control objects; and performing verification and correction on the control instructions of respective control objects and issuing to a station terminal. By increasingchances and depth of the energy storage system in power grid frequency modulation participation, the regulation actions of the conventional low-speed generator set can be reduced, the mechanical lossof the conventional generator set is lowered, and power generation economic efficiency is improved.

Description

technical field [0001] The invention relates to a coordinated control method for fast and slow frequency modulation resources considering the SOC of an energy storage system, and belongs to the technical field of automatic control of electric power systems. Background technique [0002] Frequency regulation auxiliary service is an important means to maintain the safety of power grid operation. During the operation of the power system, the AGC (Automatic Generation Control, AGC for short) system maintains the active power of the system by adjusting the active power output of frequency regulation resources in the power grid in real time. -Load supply and demand balance, so as to maintain the stability of system frequency. Due to the large differences in the power structure of different regions, the frequency modulation capabilities and efficiency of the power grids in different regions are not the same. Scheduling and system frequency modulation quality put forward higher req...

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Problems solved by technology

The combined power generation mode requires the system to be equipped with a certain battery energy storage system, and the new energy combined power generation system is formed into a dispatchable power generation unit. The application and promotion of the large-scale new energy grid-connected mode is subject to certain restrictions.

[0005] However, the above research results did not fully consider SOC management at the energy storage level, nor did they fully utilize the energy storage capacity and its technical advantages at the grid level.

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