Electric Power Transfer Ac Network TRIZ Cases

ROCOC ratios from local current measurements identify faulted HVDC conductors and locate faults despite electromagnetic coupling.

AC-side current limiters equalize pole potential in bipolar HVDC links, avoiding metallic return conductors and reducing earth electrode degradation.

DC voltage modulation lets an HVDC station set AC frequency and regulate active power when dedicated inter-station links are unavailable.

Balancing current control in chain-link converters equalizes module energy in HVDC networks while limiting resistor losses and avoiding faults.

A three-mode MVDC link with a parallel breaker enables controlled power transfer, voltage regulation, and smoother grid islanding transitions.

A module-shared CHB and rectifier topology cuts transformer count, power loss, and equipment volume while improving grid power flow control.

Switching firing angles by DC and AC current imbalance helps an HVDC line commutated converter distinguish flash-over from commutation failure.

An integrated HVDC autotransformer with phase-shifting taps feeds two AC networks at different voltages while cutting active parts and footprint.

Firmware updates run during submodule start or stop sequences using stored capacitor power, avoiding separate HVDC update supplies.

A series-connected MMC uses two half-bridge valve strings to cut submodules by nearly ⅔ while maintaining stable high-voltage AC-DC transfer.

Selective chain-link module counts in bipole HVDC converters improve transient fault reliability while cutting station cost, footprint, and cooling load.

Threshold-based energy storage control uses DC current, AC bus voltage, and arc angle to curb subsequent HVDC commutation failures.

A supplementary controller shifts the DC voltage reference to lower interconnector current before switch opening, preserving AC power exchange.

Coupled converter link circuits transfer power between two distributions to cover deep voltage dips and interruptions without added storage.

Sequential sub-module triggering checks dormant bypass thyristor valves under forward voltage, helping HVDC converters stay protected during faults.

Generator port voltage, current, and speed are used to track dynamic energy attenuation for faster HVDC receiving-end stability evaluation.

Satellite timing lets railway inverters share load over long distances and adjust phase or voltage to prevent reverse power flow.

Sequentially switching each HVDC cable wire to an auxiliary supply enables accurate fault detection and automatic disconnection of spurious current paths.

Iterative MVDC link reference tuning cuts substation active power losses during power transfer between medium-voltage feeders.

A grounded neutral bus with parallel resistance lets an HVDC link switch from bipolar to monopolar operation quickly after a pole fault.

Selective use of current flow controllers eases DC grid congestion, cuts operational losses, and maintains stable current control.

A converter reuses traveling-wave generation and echo timing to locate feeder faults in dual-supply SOP networks without extra breakers.

Temporary closure of parallel MVDC-linked NO switches restores fault-isolated MV feeders while minimizing losses and preserving radial operation.

Each server adjusts task execution from real-time grid frequency or voltage, enabling finer load control without shutting down clusters.

Controller delay compensation aligns module switching with charging or discharging current to cut HVDC waveform distortion and switching errors.

Current-based delay control aligns module switching in HVDC valves to limit waveform distortion and avoid over- or under-voltage.

When converter cell voltages diverge, the controller lowers the active power limit to keep MMC feedback stable and sustain operation.

Each server adjusts task execution from grid frequency or bus voltage, avoiding cluster shutdowns while stabilizing IT load.

A DC link between substations lets feeders be switched by load and fault conditions, improving distribution flexibility and reliability.

Keeps a fault-blocking VSC active briefly after a DC fault to transfer stored DC energy to the AC side, enabling faster isolation and restart.

Voltage measurements under two load conditions let each DC application device calibrate droop curves for stable autonomous load sharing.

Bidirectional AC/DC conversion, transformer boosting, and rectification cut long-distance renewable transmission loss and cable cost.

A centralized rectifier modulates DC load power for high-voltage plants, avoiding reactive compensation and reducing failure risk.

Using high-frequency offshore AC and uncontrolled rectifiers cuts transformer size, system cost, and losses in offshore wind DC transmission.

Module energy-change signals are voted across chain-link cells to determine converter current direction without DCCT faults or low-current errors.