Device for active power balance adjustment and reactive power compensation

Abstract

The invention discloses a device for active power balance adjustment and reactive power compensation. The device comprises a common complementary reactive power compensation intelligent capacitor, and a phase-A, phase-B and phase-C respective complementary reactive power compensation intelligent capacitor, and is characterized in that an AC line-line active power balance adjustment intelligent capacitor Cab, a BC line-line active power balance adjustment intelligent capacitor Cbc and a CA line-line active power balance adjustment intelligent capacitor Cca are arranged, wherein the device disclosed by the invention is further capable of carrying out an active power balance adjustment except a common reactive power compensation function, thus improving the utilization rate and safety of a transformer, and reducing line losses. The device disclosed by the invention further solves the problem that the device cannot work when the same MODBUS address exists on the present RS-485.

Description

[0001] technical field [0002] The invention belongs to the technology of active load adjustment and balance and reactive power compensation in electric power system, and in particular relates to a device for active power balance adjustment and reactive power compensation. Background technique [0003] The smart capacitors currently on the market are all capacitors, switches, miniature circuit breakers or fuses, detection components and control components installed in a miniaturized container. This container is called a smart capacitor, and multiple smart capacitors are connected to each other through a bus. , constitute a complete detection control reactive power compensation system. It can be said that smart capacitors are a relatively good product, which solves the problems in reactive power compensation and achieves good application results. However, with the development of users' electricity consumption, especially in rural power grids, some active power The unbalance...

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Problems solved by technology

[0004] The purpose of this invention is to design and manufacture a device for active power balance adjustment and reactive power compensation, so as to overcome the current smart capacitors that can only perform reactive power compensation and cannot Insufficient to carry out active power balance adjustment, increase the active power adjustment balance function, further improve the efficiency and safety of the transformer, reduce line loss, and can use the MODBUS communication protocol on the RS-485 bus. When the same address appears, it can be automatically set to a different address. value, to ensure the normal operation of the bus communication

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