In the new power systems, the control and protection of distribution lines rely on some new types of distribution and automation equipment, primarily three important devices: reclosers, sectionalizers, and feeder FTUs. So, when it comes to reclosers, what exactly is a recloser? What are the types of reclosers?
Gopower recloser is an intelligent protection device capable of interrupting fault currents. Its function is to automatically disconnect a section of a feeder line in the event of a fault (such as a short circuit). After a period, the recloser attempts a specified number of times to restore power to the line, aiming to improve the reliability of the distribution system.
By phase type, they can be divided into: three-phase, single-phase, and three-phase single-phase combination.
By control type, they can be divided into: electronic and hydraulic.
By rated voltage, they can be divided into: 15kV, 16-27kV, and 28-38kV.
By insulation medium, they can be divided into: oil, air, and epoxy Resin.
Gopower reclosers can be used for simple protection functions or for complex algorithms in distribution network automation. Specifically, line reclosers are circuit breakers with multiple reclose functions and self-control and protection capabilities. They can automatically detect the current passing through the main circuit and, upon confirming it as a fault current, automatically break the fault current according to definite time or inverse time protection characteristics. There's also the automatic recloser, a distribution switchgear with protection, control functions, and multiple reclose capabilities. It can automatically execute breaking and reclosing operations in AC circuits following pre-determined sequences and then automatically reset and lock. Modern reclosers typically feature the following functions:
Automatically break damaged line segments;
Automatic reclosing;
Automatically restore power from alternative power networks;
Reconfigure the local and remote network;
Self-diagnosis;
Measure network mode parameters;
Log operational and emergency events on the production line;
Remote control.
Feeder Applications: Radial Reclosers
When a recloser is installed on a radial feeder line, it automatically clears temporary faults and isolates permanent ones. Multiple reclosers can be installed on a feeder line to selectively isolate faults, ensuring fewer customers are affected.
Feeder Applications: Loop Reclosers
The main function of using reclosers in automated distribution systems is to restore power to consumers as quickly as possible. An automatic restoration system is configured using three or more interconnected ACRs. The point where the reclosers connect the feeders is called the recloser ring connection point.
Substation Applications
Reclosers can be used to quickly build cost-effective unattended outdoor substations. They provide comprehensive protection and automation functions required by substations. These devices are installed not only in newly designed substations but also in replacing outdated switchgear in existing substations.
Distributed Generation Interconnection
The traditional way to connect distributed generation to the grid is by building secondary substations. Unfortunately, this connection scheme involves high design and engineering costs, making some projects economically unfeasible. Such generous capital investment in traditional switchgear units and substations is only justified in large power plants where fault current and load limits require specially rated high equipment. However, most renewable energy generators do not require extreme ratings. Therefore, using automatic reclosers as the primary interface between renewable energy sources and the grid becomes a cost-effective alternative to substations.
+86-18666115545
Building 3, No. 2007 Mingzhu South Rd, Qianshan, Zhuhai, Guangdong, China
English 
français 
Deutsch 
русский 
português 
العربية 
tiếng việt 
ไทย 
Malay 
हिंदी 
Indonesia 
