초록 ▼

A distributed monitoring and protection system for a distributed power network. The system includes a plurality of high-speed measuring units (MUs), wherein each MU is coupled to a power line to measure values of electrical parameters of the power line. Electrical parameters, such as current, voltag

A distributed monitoring and protection system for a distributed power network. The system includes a plurality of high-speed measuring units (MUs), wherein each MU is coupled to a power line to measure values of electrical parameters of the power line. Electrical parameters, such as current, voltage, power and frequency are measured by the MUs. The MUs communicate with a control unit (CU) over a high-speed communications network. The CU includes a processor executing algorithms for evaluating the measured parameters to determine the status of the power network and the MUs. The processor also executes fault detection and isolation by comparing the measured values against predetermined threshold values. When a fault is detected by the CU, protective action, such as tripping of a circuit breaker, may be initiated by the CU directly or by transmitting the tripping command over the high speed data network to a local MU. The local MU may then trip the circuit breaker. The availability at the CU of concurrent measurements from the plurality of MUs enables improved coordination and sequencing of protective actions.

대표청구항 ▼

1. A distributed monitoring and protection system for a distributed power network comprising:a plurality of lines for distributing electric power, the lines including protective devices, and at least two of the lines connected to different current nodes at different potentials, an individual monitor

1. A distributed monitoring and protection system for a distributed power network comprising:a plurality of lines for distributing electric power, the lines including protective devices, and at least two of the lines connected to different current nodes at different potentials, an individual monitoring unit for measuring electrical parameters coupled to each of at least two of the lines, at least two of the monitoring units measuring electrical parameters from different current nodes at different potentials at least one control unit communicating remotely over a high-speed data network with each monitoring unit, the at least one control unit including a processor for (a) comparing in the control unit the measured electrical parameters of one respective monitoring unit with the measured electrical parameters of at least one other respective monitoring unit, and (b) producing in the control unit an activating signal based on the comparison of the measured electrical parameters of the one respective monitoring unit with the measured electrical parameters of the at least one other respective monitoring unit, and the control unit coupled to at least one protective device of a respective line connected to a current node, wherein the control unit trips the protective device based on the activating signal.