Outdoor intelligent protection device and its input method when the three phases are inconsistent
An intelligent protection, three-phase technology, applied in the direction of automatic disconnection of emergency protection devices, emergency protection circuit devices, circuit devices, etc., can solve the problems of no action record storage function and communication function, user troubles, equipment inaction, etc. Achieve the effect of enhancing anti-interference and reliability, improving tracking management, and ensuring accuracy
Inactive Publication Date: 2016-08-17
深圳市中江源科技有限公司
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Problems solved by technology
[0003] The current outdoor three-phase inconsistency protection of circuit breakers is composed of time relays and intermediate relays. Generally, the time accuracy is not high. Especially under the influence of outdoor environment for a long time, the increase of time error will cause the equipment to not operate or should not operate. In addition, the original device has no action record storage function and communication function, which is not conducive to the collection, analysis and further management of relevant data by remote dispatchers.
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[0034] The present invention will be further described below in conjunction with the accompanying drawings.
[0035] The present invention is a protection device composed of a microprocessor 21 and a photocoupler U1 connected between the closing position of an outdoor three-phase circuit breaker and the non-full-phase protection trip outlet relay. In the finished casing, there is a network interface 6 on the casing that can meet the IEC81650 transmission protocol and can be adapted to the model DM9000 Ethernet control module (DM9000 is a fully integrated Fast Ethernet MAC controller and general processing Interface), USB interface 5 and LCD display assembly 4 with man-machine dialogue interface, the display screen in the display assembly 4 adopts touchable LCD display, and the keyboard adopts membrane keys.
[0036] like figure 1 As shown, the outdoor intelligent protection device for three-phase inconsistency of the present invention includes an input circuit 1 that can be c...
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The invention discloses an outdoor intelligent protection device at the time of three-phase inconsistence and an input method of the outdoor intelligent protection device at the time of three-phase inconsistence. The device can be installed on a breaker and is high in anti-interference performance and reliability and accurate in timing. The device comprises a device shell, an input circuit, an output circuit and a main control circuit. The main control circuit is composed of a microprocessor and a switch circuit, the input circuit is connected with the input end of the microprocessor in a photocoupling mode, and the output end of the microprocessor is connected with the output circuit through the switch circuit. The outdoor intelligent protection device replaces a protection device connected into in a relay coil mode, the anti-interference performance and reliability of the device are improved, besides, time is delayed, and due to the facts that the microprocessor is adopted for control, and high-precision components and an algorithm are adopted, action accuracy is effectively guaranteed, and time delay precision is stably controlled within 10ms. Delay time can be preset through a man-machine interaction interface comprising a display assembly, operation is flexible, and setting precision reaches up to 1ms. The device and the input method of the device meet the IEC61850 data interface protocol standard.
Description
technical field [0001] The invention relates to a protection device connected between an outdoor circuit breaker and a non-full-phase protection tripping outlet relay when the three phases are inconsistent, and in particular to an outdoor intelligent protection device and its input method when the three phases are inconsistent. Background technique [0002] When the power system is running, due to various reasons, the three-phase circuit breaker may disconnect one or two phases, resulting in non-full-phase operation. When the system is in non-full-phase operation state, the components such as negative sequence and zero sequence appearing in the system will cause certain harm to electrical equipment. It may even cause some protection actions to trip and accidentally disconnect the normal operating lines. Therefore, the existence of a three-phase inconsistency protection device is required to avoid non-full-phase operation in the electric power device. In addition, if the sy...
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IPC IPC(8): H02H3/00
Inventor 吴顺进
Owner 深圳市中江源科技有限公司