Thermal power-storage combined frequency modulation energy storage power distribution method

Abstract

The invention relates to a thermal power-storage combined frequency modulation energy storage power distribution method, which comprises the following steps: periodically collecting incoming line frequency and an AGC instruction, calculating an AGC signal target and a primary frequency modulation target, and synthesizing a power target value for PCS system group control; judging whether the micro-grid energy storage system starts incoming line constant power operation or not, if so, calculating a synthetic incoming line target value, and adjusting the active power output value of the PCS according to the synthetic incoming line target value until the active power output value is equal to the incoming line target value; otherwise, regulating and controlling the active power of the energy storage system to calculate and synthesize the energy storage target as the target power value of the energy storage system, and distributing the output active power target value for each available PCS system according to the distribution mode; and judging whether each PCS system is in an enabled state, if so, controlling the PCS system to participate in power control operation, otherwise, adopting an available output distribution mode to distribute the charging and discharging power of each PCS, and outputting a maximum value. Compared with the prior art, the method has the advantages that the energy storage output can be quickly and accurately adjusted, and the distribution accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of fire-storage combined frequency modulation, in particular to a fire-storage combined frequency modulation energy storage power distribution method. Background technique [0002] With the continuous development of large-capacity power generation, UHV, and social and economic situations, the task of frequency regulation in power systems is very heavy. However, coal-fired units including traditional thermal power plants have various problems such as slow response speed and delayed response. Therefore, the power grid puts forward many new requirements for generator sets, the main requirements are as follows: [0003] 1) The unit needs to quickly respond to a frequency modulation action, and be able to quickly adjust frequency; [0004] 2) Improve the control level of AGC, that is, the comprehensive control level of the adjustment rate, adjustment accuracy, and response time product is optimal. [0005] In ...

AI Technical Summary

Problems solved by technology

At present, the commonly used fire storage combined with frequency modulation energy storage power distribution control method is open-loop control. The disadvantage of this control method is that the change of station load in the microgrid will affect the calculation of energy storage output.

In addition, because PCS open-loop control is mainly used, PCS open-loop control is easy to cause overshoot in power calculation, and the accuracy after adjustment is poor.

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