Testing method, device and equipment for low-frequency low-voltage load shedding protection system

Abstract

The invention discloses a testing method for a low-frequency low-voltage load shedding protection system. According to the invention, protection triggering parameters of a to-be-tested low-frequency low-voltage load shedding protection system can be determined in combination with the output characteristic data of a target microgrid system when the target microgrid system fails due to overload. Theadopted protection triggering parameters are determined based on the target microgrid, so that in the testing process, whether the to-be-tested low-frequency and low-voltage load shedding protectionsystem can play a protection role in the target microgrid system or not is tested in a targeted mode, the to-be-tested low-frequency and low-voltage load shedding protection system can be directly applied to the target microgrid after the system is tested to be qualified, the reliability is high, the probability of protection failure is low, and electricity safety accidents are prevented. The invention further discloses a testing device and equipment of the low-frequency low-voltage load shedding protection system. The testing device and equipment have the same beneficial effects as the testing method of the low-frequency low-voltage load shedding protection system.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a testing method for a low-frequency low-voltage load shedding protection system, and also relates to a testing device and equipment for a low-frequency low-voltage load shedding protection system. Background technique [0002] The frequency and voltage of the power system are important quality indicators that reflect whether the active power and reactive power of the power grid are balanced. In the conventional large power grid system, the frequency and voltage offset caused by load changes are generally adjusted and limited by special equipment. However, In most cases, the independent microgrid system does not have the ability to adjust, so for the microgrid system, the low-voltage low-frequency load shedding protection system is often selected to regulate the frequency and voltage. For this key protection device, can it play a protective role? It is of great significance. However,...

AI Technical Summary

Problems solved by technology

[0002] The frequency and voltage of the power system are important quality indicators that reflect whether the active power and reactive power of the power grid are balanced. In a conventional large power grid system, the deviation of frequency and voltage caused by load changes is generally limited by special equipment. However, In most cases, the independent microgrid system does not have the ability to adjust. Therefore, for the microgrid system, the low-voltage and low-frequency load shedding protection system is often selected to regulate the frequency and voltage. For this kind of key protection equipment, whether it can play a protective role It is of great significance. However, there is no test method for the low-frequency low-voltage load shedding protection system in the prior art. Once the protection failure of the low-frequency low-voltage load shedding protection system occurs, it may cause serious electrical safety accidents.

Images