Trigger control method and system for reactive power adjustment event of power system

Abstract

The present invention discloses a trigger control method for the reactive power adjustment event of a power system. The method comprises the steps of 1) measuring and monitoring the tidal current state signal of a power grid in real time; 2) filtering the signal obtained in the step 1) to obtain a tidal current state signal; 3) processing the signal obtained in the step 2) and conducting the A / D conversion of the signal to obtain a digital signal; 4) calculating the difference between the digital signal and a real-time power grid tidal current state expected value; 5) introducing a lyapunov function, proving the stability of the system, and confirming that the state of the system can be converged to the expected value; 6) according to conclusion of the step 5), designing a method for the event trigger control of the system, and determining an event triggering condition; 7) calculating the event triggering condition of the formula 6), and triggering an event if the condition is met; 8) repeatedly executing the step 7). The invention further discloses a system adopting the above method. The method and the system have the following advantages: the power balance of the power system is ensured; the operation stability and the operation quality of the power system are improved; and the adjustment consumption and the communication cost of the system are reduced maximally.

Description

technical field [0001] The invention relates to an electric power system, and more particularly relates to a method for adjusting reactive power of an electric power system. Background technique [0002] In the power system, due to insufficient reactive power, the system voltage and power factor will be reduced, thereby damaging electrical equipment, and in severe cases, it will cause voltage collapse, disintegrate the system, and cause large-scale power outages. In addition, the reduction of power factor and voltage will also make electrical equipment not fully utilized, resulting in increased power loss and reduced efficiency, limiting the power transmission capacity of the line, affecting the safe operation of the power grid and the normal power consumption of users. [0003] In the power system, in addition to the generator as the power source of reactive power, the capacitance of the line also generates part of the reactive power. When the above two power sources canno...

AI Technical Summary

Problems solved by technology

However, this method has the following disadvantages: 1) It needs to establish an optimization model in advance, which is inconvenient to use; 2) It needs to calculate many intermediate variables

The disadvantage of this scheme is that the stability of the system is difficult to guarantee

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