Intelligent series compensation device for distribution network and use method of compensation device

Abstract

The invention develops an intelligent series compensation device for a distribution network and a use method of the compensation device. The device has the effects of improving the distribution of voltage along a power distribution line, reducing voltage drop and improving the transmission capacity of the line and has the characteristics of load-self-adaptive voltage regulation and real-time response. In order to achieve the effects, the intelligent series compensation device for the distribution network comprises a capacitor group, a silicon controlled rectifier, a controller, an integrated reactor / resistor, a circuit breaker, a contactor, an isolating switch and a sensor. Due to the adoption of the technical scheme, when a system normally works, the voltage which is compensated by series capacitors can automatically respond to the variation of load current in real time without any extra control; when a failure occurs in the system, the warning, the short-time bypass and the protection of the device can be realized through the operation of the controller on a switch.

Description

technical field [0001] The invention belongs to the field of voltage quality control of distribution networks, and in particular relates to an intelligent distribution network series compensation device for 10kV distribution lines and a use method thereof. Background technique [0002] As we all know, the voltage quality of distribution network is an important indicator to measure whether the quality of power supply meets the standard. Its quality is directly related to the safe and economic operation of electrical equipment and the normal operation of production. Power users have increasingly higher requirements for voltage quality. However, the construction of my country's distribution network is seriously lagging behind that of the transmission network. Its grid structure is weak, the facilities are aging, the wire diameter is small, the line is long-especially the mountain village line-the number of distribution transformers is large, and even many lines have multiple la...

AI Technical Summary

Problems solved by technology

However, this type of protection equipment is complicated to implement, large in size, expensive, and difficult to maintain.

[0007] (3) If one or several capacitors in the capacitor bank of the series compensation device are damaged, the phase voltage and current will change, resulting in three-phase unbalance of the line

The excitation inrush current caused by the reclosing phenomenon of the distribution line will cause the overvoltage of the series compensation capacitor, thus affecting the safe operation and service life of the equipment

[0009] (5) The operating conditions of the existing series compensation device lack the means to obtain real-time information, including input / bypass, whether the switch and capacitor equipment are normal, whether the secondary equipment is normal, etc.

Such a device works well, but the structure is too complicated

Images