Intelligent circuit breaker and NKE-93 intelligent terminal
Intelligent circuit breaker NKE digital substation process layer in the system comprises a circuit breaker, isolating switch and NKE-93 intelligent terminal composition. Each interval configuration of a NKE-93, the nearest installation in the vicinity of the circuit breaker body. The NKE-93 has 16 input amount acquisition channel, nearby gathering state of circuit breaker and isolating switch, when the quantity of state changes, through the high-speed optical fiber Ethernet to the spacer layer two equipment release GOOSE message, the message contains state variables change quality, time and other information. The two devices need to control circuit breaker and isolating switch action, also published by optical fiber Ethernet GOOSE message corresponding to the NKE-93, the NKE-93 control circuit is composed of tripping operation.
Intelligent circuit breaker with conventional circuit breaker has following advantages compared:
(1) intelligent terminal installed on the spot in the vicinity of the circuit breaker body, through cable is connected with the two device, effective isolation between the one or two devices, eliminating the electromagnetic harassment, to improve the safety and reliability of the two device;
(2) special high speed Ethernet technology and GOOSE message fast retransmission mechanism and receiving warning mechanism greatly improves the transmission state variables, control command of real time and success rate;
(3) intelligent terminal has 16 into the channel, the maximum 19 open channel, can monitor and control the interval of all state, can achieve the operating sequence of anti misoperation lockout and intervals;
(4) with on-line monitoring function of primary equipment, the timing of maintenance on a device into the state overhaul;
(5) with 4 fiber Ethernet interface, sharing in the realization of network interconnection and data at the same time, greatly reduce the amount of switch.
(6) can receive IRIG-B time signal station, realize the domain control.
(7) with a small amount of cable instead of a large number of cables, save copper metal consumption, reduce the difficulty of construction
智能断路器和NKE-93智能终端
NKE数字化变电站过程层系统中的智能断路器由断路器、隔离开关和NKE-93智能终端组成。每个间隔配置一台NKE-93，就近安装于断路器本体附近。NKE-93具备16路开入量采集通道，就近采集断路器和隔离开关的状态，当状态量变化时，通过高速光纤以太网向间隔层二次设备发布GOOSE报文，报文中包含状态量变化的品质、时间等信息。二次设备需要控制断路器和隔离开关动作时，也通过光纤以太网向NKE-93发布相应的GOOSE报文，由NKE-93控制合跳闸操作回路。
智能断路器与传统断路器相比具有如下优点：
（1）智能终端就地安装于断路器本体附近，通过光缆与二次设备连接，一二次设备之间有效隔离，消除电磁骚扰问题，提高二次设备的安全可靠性；
（2）高速以太网技术和GOOSE报文特有的快速重发机制和接收预报警机制大大提高了状态量、控制命令的传输实时性和成功率；
（3）智能终端具备16路开入通道，最大配置19路开出通道，可监视、控制本间隔所有状态，能够实现间隔内的防误闭锁和顺序操作；
（4）具备一次设备在线监测功能，可将对一次设备的定时检修转变为状态检修；
（5）具有4路光纤以太网接口，在实现网络互连和数据共享的同时，大大减少交换机的用量。
（6）可接收IRIG-B对时信号，实现站域控制。
（7）用少量光缆代替大量电缆，节省铜金属用量，降低施工难度
ELECTRIC
