One side of the AC current at rated current ratio convert available for measurement, protection or control other equipment

The primary side AC current at rated current ratio convert available for measurement, protection or control equipment, instrumentation or protection devices used in the secondary side of the current converter equipment. The primary winding of the current transformer to  Circuit breaker , the protection or control circuit in series, the secondary winding and measuring, protection or control  air circuit breaker  to the coil current, so that the first and second side of the high and low pressure  Voltage stabilizer . When used properly, a current transformer, the ratio of the secondary rated current, and the first and second winding turns inversely. The phase difference between the current close to zero. Type according to the primary winding structure is different, can be divided through the wall, bus, cable type, casing.

Closure between the two windings on the core of the electromagnetic induction effect

Closing the two windings on the core using electromagnetic induction effect between the measured AC current conducted by the rated value conversion ratio of the instrument. Including power system measurement and laboratory precision current  Voltage stabilizer transformer. The function of the current transformer are: ① limit the amount of extended meter to measure current; ② The rated current is converted to a uniform nominal value, in order to facilitate the standardization of the connected meter; ③ the meter and the measured line high potential isolation to ensure security; ④  power transformers transformer can be used for standard instrument used to test the accuracy level of at least two low-current transformer, or limit the amount for the extension device with a standard table, the corresponding test meter.

More suitable for real-time control of dynamic recurrent neural network to replace the original proposal in recognition of its multi-layer feedforward network

Using a more suitable for real-time control of dynamic recurrent neural network to replace the original proposal in  Air circuit breaker of its multi-layer feedforward network. Simulation results show that the improved method than the original method and with the reader's neural network PID control method has better response performance. electric meter system, first studied the predictive performance index based on multi-function multi-variable system under the neural network PID control and simulation examples are given and conclusions; Then study multivariable PID neural  mcb circuit breaker  structure and calculation method: it is a sub-network of a plurality of parallel, when the control system has a controlled variable n, the n sub-network there. Each sub-network input layer of a given signal receiving system and the object output signal;

Constitute a multi-step prediction performance index function under the neural network PID control system

In order to improve the control effect of the controller as the goal, the neural network combined with PID control, respectively, univariate and multivariate systems system neural network structure PID  Air circuit breaker  in-depth research and exploration. For single-variable system, the predicted control theory and neural network PID  electric meter combined with a multi-step prediction performance index function to train the neural network controller weights constitute the multi-step prediction  Voltage stabilizer  function neural network under PID control system; article for this system has been improved, the introduction of a new multi-step prediction performance index function, while the neural network identifier part.

After two planes parallel stability problems in the past on these issues in detail simulation

Generator self-excitation, dual side by side issues such as post-stabilization, the previous literature on these  electric meter  simulation. With the development of the power system, increasing the capacity of the transformer, the recovery process in the system to achieve the delivery of Air circuit breaker  not be avoided large-capacity  mcb circuit breaker  no-load input. Load capacity of the transformer inrush current and input will produce resonance over-voltage, inrush current mechanism was analyzed, airdrop large capacity transformers may cause malfunction protection, but also for their own safety and the power transformer operation of the system have a relatively large hazards.

Partial system failure may cause a large area blackout

With the cross-regional interconnected power system, increasing the size of the grid, the interaction  power transformers  various subsystems and more serious, localized system failure may lead to large-scale power outages, and even the collapse of the entire power system collapse.  electric meter , as the safe operation of the power system is one of the important measures, the problem of black start is very important. With self-starting capability of the unit start without self-starting  Electric energy meter , and gradually expand the scope of the transmission system, and ultimately the entire system recovery. In the System Recovery process involves frequent operations, and therefore may cause over-voltage lines.

Transformer differential protection unexplained errors, significantly increased risk of rejection action, safety and security to the grid

Transformer differential protection unexplained error, refused action probability increased significantly, to the power grid safety and security, but also affect the normal conduct of industrial production. Since the transformer also includes a circuit and various circuit coupled magnetic core, making the transformer during the closing operation,  mcb circuit breaker system failure is often accompanied by removal of complex electromagnetic transient process that requires multi-disciplinary knowledge to carry out these processes more reasonable analysis. However, so far, on the transformer  power transformers  transient analysis of complex  Circuit breaker  theory is still relatively weak, and a thorough study of the mechanism of occurrence of failures or disturbances and characteristics found through a variety of complex transient disturbances transformer Differential Protection abnormal behavior of the real action reasons.