38 results about "Logic locking" patented technology

The present invention extends to methods, systems, and computer program products for resolving lock conflicts. For a state persistence system, embodiments of the invention can employ a logical lock clock for each persisted state storage location. Lock times can be incorporated into bookkeeping performed by a command processor to distinguish cases where the instance is locked by the application host at a previous logical time from cases where the instance is concurrently locked by the application host through a different name. A logical command clock is also maintained for commands issued by the application host to a state persistence system, with introspection to determine which issued commands may potentially take a lock. The command processor can resolve conflicts by pausing command execution until the effects of potentially conflicting locking commands become visible and examining the lock time to distinguish among copies of a persisted state storage location.

The invention brings forward a switching operation bill generation method of a railway transformation and distribution substation. The method comprises the following steps: selecting an operation task and an operation mode, a system, through carrying out topology analysis on a main wiring diagram, listing circuit breakers of all outlet wires, upper and lower isolation knife brakes, buses, bus couplers and the like, then entering graphic billing, when switching operation is carried out and an operation bill is issued, first of all, selecting a current operation mode, secondly, selecting devices and cabinet bodies which are related to by operation of this time, according to the currently selected devices, extracting rules related with the operation from a rule base to establish a new rule table, for the new rule table, generating operation statements according to a first-transverse-and-then-longitudinal sequence, and filling a bill sample with the generated operation statements. According to the invention, a logic relation table with powerful functions can be automatically generated, through the table, the association sequence among operation cabinet bodies and the logic locking relations among operation devices can be solved, and operation bills of all operation types of a whole station can be automatically generated in an accurate manner.

The invention relates to a controller for switching a grid connection photovoltaic power generation system and an off-grid photovoltaic power generation system, which comprises a detection control device, a main switcher and four wiring terminals; the detection control device comprises a logic locking module, and a grid fault detection module, a first photovoltaic control module and a second photovoltaic control module which are respectively connected with the logic locking module; and the logic locking unit is connected with the main switcher, and is used for controlling the main switcher to switch the grid connection photovoltaic power generation system and the off-grid photovoltaic power generation system according to the detection information of the grid fault detection module, the first photovoltaic control module and the second photovoltaic control module. According to the controller for switching the grid connection photovoltaic power generation system and the off-grid photovoltaic power generation system, the logic locking module controls the main switcher to quickly switch a grid connection photovoltaic power generation method or an off-grid photovoltaic power generation method, so that the load of a user or important loads can continue to work uninterruptedly without being affected by the faults of utility power or power-off, and the grid connection photovoltaic power generation system and the off-grid photovoltaic power generation system are effectively integrated.

The invention discloses a differential protection method for a multi-winding arbitrary phase shift angle phase shift transformer. The method comprises steps that currents of windings at a primary side and a secondary side of a transformer are acquired in real time; reduction from a secondary side multi-winding arbitrary angle current of the transformer to a primary side current is carried out through a phase shift synthesis algorithm; current differential amount and braking amount are calculated according to the current after reduction and the primary side current; in combination with the current differential amount and the braking amount, whether action conditions are satisfied is determined, if yes, a differential protection logic locking mark is invalid, differential protection is valid, and the protected transformer is cut off through tripping. The method is advantaged in that the method is suitable for differential protection on the multi-winding arbitrary phase shift angle phase shift transformer, the method is compatible with differential protection of common transformers, strong universality is realized, and the phase shift synthesis algorithm provides a new solution thinking for reduction from the secondary side multi-winding arbitrary angle current of the transformer to the primary side current.

The invention discloses an intelligent program-control error-locking prevention system based on integrated design. An anti-misoperation host and a monitoring background host are integrated, and a measurement-control network and an anti-misoperation network are integrated. A measurement-control unit is provided with a five-prevention locking node which can be controlled in a monitoring system background, and the five-prevention locking node is a normally opened node in series with an operation circuit, so operation can be performed only when the five-prevention locking node is closed, regardless of remote control or on-site operation. After the five-prevention logic of inspection equipment completes the simulated preview of operation tickets on a monitoring-system background host, according to a formed sequence of the operation tickets, a background monitoring system automatically closes the five-prevention locking node corresponding to current equipment to be operated, and the closureof the mode shows that the equipment passes double verification about five-prevention logic locking and operation-ticket sequential locking. The error-locking prevention system can ensure that only the correct equipment can be operated within the whole range of a substation, regardless of remote control through the host in a station control layer, operation in an interval layer or on-site operation in an equipment layer.

The invention discloses a parallel-connected microcomputer electrical error-proof locking device, which consists of a touch screen display, an indicator light, a power supply board, a CPU board, a main DSP board, a spare DSP board, an input board and an output board. The logic of the locking circuit is clear and clear through the new locking method, and the locking logic can be checked at any time, and the specific fault point can be quickly indicated, which is convenient for modification, maintenance and maintenance. Reliability under various failure conditions. The parallel microcomputer electrical error prevention device of the present invention has the advantages of being convenient for rapid defect elimination, convenient for management, and simplified wiring while ensuring the same reliability as the electric lock + logic lock mode.

Provided is a transition method for a monitoring system modification process during intelligent modification of a conventional substation. The method comprises: modifying a 61850 protocol measurement and control device of a bus first, replacing an original bus measurement and control device, and accessing a 61850 protocol intelligent station control level network so as to achieve a spacer-layer logic locking function measured and controlled by the bus and responsible for a remote control operation of an earthing knife switch of the bus; not dismantling the original bus measurement and control device, forbidding a remote control operation function thereof, and guaranteeing the improvement of the spacer-layer logic locking function of an original 103 protocol network side switch; suspending the spacer-layer interlocking function related to the bus measurement and control device in the 61850 protocol intelligent station control level network, and guaranteeing the integrity of a bus disconnecting switch locking function by means of a logic locking function of the station control level; and modifying the original 103 protocol measurement and control devices successively according to strings based on a power outage plan, recovering the bus spacer-layer interlocking function of the 61850 protocol intelligent station control level network after all the modification is finished, achieving the integrity of full-station spacer-layer interlocking, and dismantling the original 103 protocol bus measurement and control devices. The method can be widely used in the field of intelligent modification of conventional substations.