A variable length crane system under the external disturbances and constraints is studied in two-dimensional space. The dynamical analysis of cable considers length, tension, speed, coupled vibrations longitudinal-transverse directions. Considering output constraint problems, boundary control algorithms with signal barriers are designed acted on to reduce flexible cable, ensure stability theory. Effectiveness performance proposed schemes depicted via several simulation examples.

The smart substation, revolutionarily changing every aspect of the modern is developing fast in world and being massively deployed China quickly. A substation typically implemented with a sophisticated combination primary high-voltage equipment hierarchically networked secondary devices. Based on IEC61850 communication protocol, functionalities, such as information sharing interoperability among electric equipment, are realized substations. It regarded basis for development grid represents...

Channel reciprocity is regarded as one of the most important advantages TDD systems. However, RF front-ends contribute to channel experienced, and their TX/RX mismatches might cause error, thus degrade system throughput. Therefore, calibration a crucial issue. Among existing methods, Over-the-air (OTA) promising approach because no extra hardware cost needed. Since OTA precision highly depends on link quality between Base Station (BS) User Equipment (UE), how select proper UE for an In this...

The occurrence of electric arcs poses a huge threat to personal and equipment safety. As one the effective ways actively protect personnel away from serious arcing incidents, signature recognition based identification method has drawn much attention. However, since strong nonlinear dynamics arcs, merely on specific time-domain or frequency-domain feature develop criteria may not be applicable in practice. To overcome limitations, this article proposes novel arc fault approach, which...

The smart substation, revolutionarily changing every aspect of the modern is developing fast in world and being massively deployed China quickly. A substation typically implemented with a sophisticated combination primary high-voltage equipment hierarchically networked secondary devices. Based on IEC61850 communication protocol, functionalities, such as information sharing interoperability among electric equipment, are realized substations. It regarded basis for development grid represents...

The substation is the heart of an interconnected power system. With development smart grid, concept a proposed. objectives substations are to build efficient networked information-management platform, increasing flexibility in organization and distribution information, greatly enhancing capabilities information exchanging processing substation. However, onsite commissioning more complex than that traditional ones, because digital difficult measure flow needs be testified. In this paper,...

Smart substation, in which various types of information are being exchanged on a communication network, is regarded as typical cyber-physical system (CPS). The network-induced time delay, inherently stochastic, makes the performance power operation and protection unpredictable. This paper attempts to study stochastic properties end-to-end delay time-critical smart substation CPS environment. components CPS, including data flow, intelligent electronic device (IED), modeled. flow network...

In order to improve the fault monitoring performance of grounding electrode lines in ultra-high voltage DC (UHVDC) transmission systems, a novel approach based on high-frequency standing-wave ratio (VSWR) is proposed this paper. The VSWR defined considering lossless line, and characteristics under different conditions are analyzed. It shown that equals 1 when terminal resistance completely matches characteristic impedance short circuit occurs will be greater than 1. positive infinity...

Electronic current transducers based on Rogowski coil are commonly used for power system protection. However, they may generate additional dynamic components in some cases that cause misoperation of protection devices. In order to check the hidden danger this undesired phenomenon, article studies transfer characteristics and proposes an approach detect possible occurrence component phenomenon. First, root appearance is analyzed investigated. Then, using electromagnetic transient simulation...

Surviving in an increasing globalization, distribution and flexibility environment, modern manufacturing requires extremely flexible, self-adaptive foundation capable of dynamic provisioning, coordinating using infinite resources available on demand over large-scale computer networks. In contrast to the conventional networked approach, cloud vision (GetCM) introduced this paper promises elasticity, adaptability through on-demand provisioning as a utility by reflecting basic principles...

In this paper, the mechanism of ultra-low frequency oscillation (ULFO) is studied according to damping torque theory and influence proportional, integral differential parts (PID) parameter settings hydro-governor on ULFO investigated. After that, a deep Q network (DQN) based method proposed for PID self-tuning, which considering uncertainty hydraulic turbine operating conditions. Simulation results show that DQN-based can provide optimal parameters under all conditions, achieves better...

Feed forward decoupling control under Rotating coordinate can suppress the static error of single-phase PWM rectifier's current. But due to variation inductance in actual situation, performance will be poor. The feedforward method without value is adopted this paper solve problem that not accurate. Simulink simulation results show completed when L

Accurate and reliable electric arc fault identification ensures the safety of personnel equipment through in-field operations maintenance work. However, due to application scenarios nonlinear dynamics, distortion degree detectable signals is influenced by network/circuit structure, system parameter, operation manner, etc., salience signatures may change significantly, which poses challenges develop "generic scheme" in faults identification. To address such issues, this paper proposed a...

Channel reciprocity is regarded as one of the most important advantages TDD systems. However, uplink (UL) and downlink (DL) channels are not actually reciprocal because different characteristics transmitters (TXs) receivers (RXs). When antenna elements placed with large distance, Radio Frequency (RF) gain mismatch TXs RXs dominant un-reciprocal factor, but if close, such compact array, mutual coupling (MC) should be considered. In general, MC effects for a transmitting receiving array...

In order to comprehensively evaluate and improve the performance of Rogowski coil electronic current transformer (RCECT), this paper presents a method for steady state characteristic dynamic test. The testing scenario is configured in an electromagnetic transient simulation software (PSCAD), then digital signals are reproduced as analog by amplifiers. sensor head also implemented PSCAD model, avoid reproduction large current. actual circuitry RCECT (Data acquisition card Merging Unit: MU)...

lEC 61850 "Communication networks and systems in substation" is not only the most advanced universal standard for communication but also a comprehensive system oriented substation automation (SAS). This paper proposes transmission solution scheme which combines Multicast Sampled Value (MSV) Generic Object Oriented Substation Event (GOOSE) information one network (Transmit MSV GOOSE simultaneously with line). are described detail next context, then traffic flow delay of two messages estimated...

In this paper, a hoisting cable with varying length under the external disturbances is investigated. The dynamical modeling for system takes into account variable length, tension and speed. coupled vibrations of in longitudinal-transverse directions are suppressed by designed control inputs acted on boundary cable. Considering output constraint problems, barrier Lyapunov function (BLF)-based proposed to generate novel algorithms which reduce undesirable flexible crane prove boundedness...

This paper focuses on the dynamic response testing method of Rogowski coil electronic current transformer, causes and generating conditions additional component in secondary signal was discussed, then electromagnetic transient (EMT) model set up, parameter calculation considering leakage flux put forward, a new based simulation analog playback technology novel system for transformer developed, which can complete power frequency, harmonic traveling wave characteristics measurement. Testing...