Distribution network tail end low voltage comprehensive treatment device and control method thereof

By designing a low-voltage comprehensive management device at the end of the distribution network, monitoring and adjusting the load-side voltage signals in real time, and controlling the inverter module action using PID control algorithm and SVPWM, the voltage fluctuation problem in the power system is solved and the reliability and stability of the power system is improved.

CN119695960APending Publication Date: 2025-03-25CHUXIONG POWER SUPPLY BUREAU OF YUNNAN POWER GRID CO LTD
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Patent Information

Application Number
CN202411782249.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-05
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

The existing technology is difficult to effectively solve the dynamic fluctuations in the power system such as voltage drop, sudden rise or flicker, which leads to the inability to operate normally, and the existing solutions have obstacles in cost and technical requirements.

Method used

Design a low-voltage comprehensive management device at the end of the distribution network, including detection module, rectifier module, energy storage module, inverter module, isolation transformer module, central control module, adjustment module and human-computer interaction module. By monitoring and adjusting the three-phase voltage signal on the load side in real time, using PID control algorithm and SVPWM to control the inverter module action, quickly respond to voltage fluctuations, and achieve dynamic adjustment.

Benefits of technology

It improves the reliability and stability of the power system, reduces equipment failures caused by voltage fluctuations, achieves stability of the load-side voltage, and improves the voltage reliability at the end of the distribution network.

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Abstract

The invention relates to the technical field of distribution network tail end low-voltage treatment, and provides a distribution network tail end low-voltage comprehensive treatment device and method.A rectification module, an energy storage module, an inversion module and an isolation transformation module are sequentially connected, the input end of the rectification module is connected with a three-phase power grid, and the output end of the isolation transformation module is connected with a load side; the three-phase voltage signal of the load side is monitored and adjusted in real time to ensure that the voltage is maintained in an expected range, so that the stability of a power system is improved, and equipment faults caused by voltage fluctuation are reduced; the PID control algorithm and the SVPWM are used for controlling the action of the inversion module, so that voltage fluctuation can be quickly responded, and dynamic adjustment is realized; the energy storage module stores electric energy during the voltage stabilization period and releases the electric energy quickly when the voltage drops, so that the voltage stability of the load side is ensured, and the energy storage module is only used for filtering when the voltage is normal. The LC filter is arranged between the inversion module and the isolation transformation module, so that the electric energy quality is improved, and the voltage reliability of the tail end of the power distribution network is improved.
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