Control and protection system of series compensation device or fault current limiter

Abstract

The invention belongs to the field of an FACTS (Flexible Alternate Current Transmission System) of a power supply system, particularly relates to a control and protection system with independent control and protection functions, which is used for a series compensation device or a fault current limiter. The control and protection system comprises a protection part, a control part and an operation executing part and realizes relatively independent control function and protection function. A protection device and a measurement and control device have abundant external communication interfaces, and in consideration of the access of in-station electric quantity information, switching value information and the like at the external communication interfaces of the measurement and control device, the structure of the measurement and control device is more open and flexible. The control and protection system can be applied to fixed series compensation type, controllable series compensation type and series resonance type fault current limiters and other flexible alternate current power transmission devices.

Description

technical field [0001] The invention belongs to the field of flexible alternating current transmission (FACTS) of electric power system, and in particular relates to a control and protection system of a series compensation or fault current limiter device whose control and protection functions are independent of each other. Background technique [0002] The series capacitor compensation technology of the AC transmission system (referred to as series compensation) is to connect the power capacitor in series in the AC transmission line to compensate the partial inductive impedance of the AC transmission line, so as to increase the transmission capacity of the line, improve the stability of the system, reduce the loss of the network, and save energy. investment purposes. In long-distance and large-capacity power transmission systems, as the transmission distance increases, its transmission capacity is increasingly limited, and series compensation is one of the important means to...

AI Technical Summary

Problems solved by technology

This design has the following defects: 1. When the protection device is powered off, the remote control of the switch and knife switch will not be realized; 2. When the control part of the control protection is overhauled, the protection part cannot operate normally

If the protection part in the control and protection system does not operate, the entire device must be shut down, thus reducing the availability and utilization of the entire device; 3. It is difficult for the device to access other electrical quantity information in the station

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