CN104052036A - Intelligent controller used for intelligent low-voltage breaker - Google Patents

Abstract

The invention relates to an intelligent controller used for a universal low-voltage intelligent breaker. The intelligent controller is mainly composed of a signal mutual inductor, a multi-way switch, an amplification circuit, a DSP, an ARM processor, an Ethernet communication interface, a GPS interface, a power amplification circuit, an environment temperature detecting module and a display setting keyboard. According to the controller, three-phase four-line voltage signals and three-phase current signals in a main return circuit are obtained through the signal mutual inductor; through an external display setting keyboard module, different voltage and current setting values are set and three protection curves in different ranges are selected; a data processing platform based on the ARM processor S3C2440 and comprising an embedded-type UC/OS-II operation system conducts data exchange with a grid spacing layer through the Ethernet interface according to the IEC61850 communication protocol. When abnormal situations occur, the ARM processor will emit a signal for releasing processing, and only after faults are removed, can resetting be conducted.

Description

A kind of intelligent controller for intelligent low-pressure circuit breaker

Technical field

The invention belongs to dynamo-electric manufacture field, particularly a kind of intelligent controller for low-voltage intelligent circuit breaker.

Background technology

Low-voltage circuit breaker is a kind of conventional distribution apparatus, in every power engineering, is widely used, and it is undertaking the function of distribution and protection in low-voltage distribution system.Its operating characteristics is most important to the safety and stability of electrical network.In the time breaking down in system, faulty component in circuit breaker excision system fast, or cut off whole Power supply, to prevent that fault from expanding, and avoids causing huge economic loss and casualties.At present, the low-voltage circuit breaker of China is structurally in fourth stage, towards the future development of intellectuality, communication, commercialization.

Summary of the invention

The object of this invention is to provide a kind of intelligent controller for low-voltage intelligent circuit breaker.

for an intelligent controller for universal low-voltage intelligent circuit breaker, this controller mainly by: signal transformer, variable connector and amplifying circuit, dsp processor, arm processor, too Netcom's communication interface, GPS interface, power amplification circuit, ambient temperature detection module, show that the keyboard of adjusting forms;

---described signal transformer; Obtain three-phase and four-line voltage signal and three-phase current signal in major loop;

---variable connector and amplifying circuit; The signal obtaining from signal transformer is amplified and makes in order DSP gather;

---dsp processor; Three-phase current, voltage, active power, reactive power, energy, effective value, power factor (PF) and frequency are measured, and carried out exchanges data by IIC interface and ARM chip S3C2440;

---arm processor; Be combined and realize voltage, current detecting with dsp chip TMS320UC5402, select the three section protection curve of different range to determine to carry out the corresponding action of threading off; Its inner data processing platform (DPP) containing embedded UC/OS-II operating system, can use IEC61850 communication protocol and electrical network wall to carry out exchanges data by Ethernet interface, in the time there are the abnormal conditions such as excessive, the short circuit of wink streaming current or overload, ARM will send fault detect output signal;

---too Netcom's communication interface; Play communication connection function, make arm processor carry out exchanges data with IEC61850 communication protocol and electrical network wall;

---GPS interface; Can receive GPS to time signal, to meet the requirement of real time of IEC61850 communication;

---power amplification circuit; Detection signal is carried out after power amplification the executive component processing of threading off;

---ambient temperature detection module; Internal system environment is detected, ensure the fail safe of its work;

---show the Keysheet module of adjusting; Can set different voltage, current setting, select the three section protection curve of different range;

This controller obtains three-phase and four-line voltage signal and the three-phase current signal in major loop by signal transformer; By the external demonstration Keysheet module of adjusting, set different electric current and voltage setting values, select the three section protection curve of different range; Taking arm processor S3C2440 as basis, the inner data processing platform (DPP) containing embedded UC/OS-II operating system, use IEC61850 communication protocol and electrical network wall to carry out exchanges data by Ethernet interface, in the time there are the abnormal conditions such as excessive, the short circuit of wink streaming current or overload, ARM will send fault detect output signal, and after power amplification to the executive component processing of threading off, after trouble shooting, just can reset.

Adopt intelligent controller of the present invention, in the time there is short-circuit current, the circuit breaker action of must threading off in time, adopts dsp processor to process; In the time that the electric current in circuit exceedes predetermined value, without arm processor processing, carry out tripping operation action, the mechanical action time that switch off time is release at once.Therefore intelligent controller of the present invention is swift in response in time, can avoid to greatest extent the generation of accident.

Brief description of the drawings

Fig. 1 is the fundamental diagram of intelligent controller of the present invention.

Embodiment

The present invention, as the core component of universal low-voltage intelligent circuit breaker, is now elaborated in conjunction with Fig. 1:

For an intelligent controller for universal low-voltage intelligent circuit breaker, this controller mainly by: signal transformer, variable connector and amplifying circuit, dsp processor, arm processor, too Netcom's communication interface, GPS interface, power amplification circuit, ambient temperature detection module, show that the keyboard of adjusting forms.Signal transformer is obtained three-phase and four-line voltage signal and the three-phase current signal in major loop by dsp processor.Voltage, current signal Acquisition Circuit Main Function are that three-phase current, three-phase voltage signal are pooled together, and make in order DSP gather these signals by variable connector and amplifying circuit.By the external demonstration Keysheet module of adjusting, can set different electric current and voltage setting values, select the three section protection curve of different range.The built-in fft algorithm of dsp chip TMS320UC5402, completes the measurement of three-phase current, voltage, active power, reactive power, energy, effective value, power factor (PF) and frequency, and carries out exchanges data by IIC interface and ARM chip S3C2440.

The present invention is taking arm processor S3C2440 as basis, the inner data processing platform (DPP) containing embedded UC/OS-II operating system, it can use IEC61850 communication protocol and electrical network wall to carry out exchanges data by Ethernet interface, in the time there are the abnormal conditions such as excessive, the short circuit of wink streaming current or overload, ARM will send fault detect output signal, and after power amplification to the executive component processing of threading off, after trouble shooting, just can reset.

In in native system, use GPS interface, can receive GPS to time signal, to meet the requirement of real time of IEC61850 communication.

In native system, be provided with ambient temperature detection module, can detect internal system environment, ensure the fail safe of its work.

The feature of this intelligent low-pressure circuit breaker:

1), comprise three-phase voltage, current transformer, user of service can set different current settings, the convenient three section protection curve of selecting different range.

2), used special DSP acquisition chip TMS320UC5402, in the time there is short-circuit current, the circuit breaker action of must threading off in time adopts dsp processor for this reason; In the time that the electric current in circuit exceedes predetermined value, process without ARM, carry out tripping operation action, the mechanical action time that switch off time is release at once.

3), used arm processor S3C2440, the normal operation of guarantee UC/OS-II operating system like this, to facilitate the requirement of real time that meets IEC61850 stipulations by GPS interface.

Claims (1)

1. for an intelligent controller for universal low-voltage intelligent circuit breaker, it is characterized in that: this controller mainly by: signal transformer, variable connector and amplifying circuit, dsp processor, arm processor, too Netcom's communication interface, GPS interface, power amplification circuit, ambient temperature detection module, show that the keyboard of adjusting forms;

---described signal transformer; Obtain three-phase and four-line voltage signal and three-phase current signal in major loop;

---variable connector and amplifying circuit; The signal obtaining from signal transformer is amplified and makes in order DSP gather;

---dsp processor; Three-phase current, voltage, active power, reactive power, energy, effective value, power factor (PF) and frequency are measured, and carried out exchanges data by IIC interface and ARM chip S3C2440;

---arm processor; Be combined and realize voltage, current detecting with dsp chip TMS320UC5402, select the three section protection curve of different range to determine to carry out the corresponding action of threading off; Its inner data processing platform (DPP) containing embedded UC/OS-II operating system, can use IEC61850 communication protocol and electrical network wall to carry out exchanges data by Ethernet interface, in the time there are the abnormal conditions such as excessive, the short circuit of wink streaming current or overload, ARM will send fault detect output signal;

---too Netcom's communication interface; Play communication connection function, make arm processor carry out exchanges data with IEC61850 communication protocol and electrical network wall;

---GPS interface; Can receive GPS to time signal, to meet the requirement of real time of IEC61850 communication;

---power amplification circuit; Detection signal is carried out after power amplification the executive component processing of threading off;

---ambient temperature detection module; Internal system environment is detected, ensure the fail safe of its work;

---show the Keysheet module of adjusting; Can set different voltage, current setting, select the three section protection curve of different range;

This controller obtains three-phase and four-line voltage signal and the three-phase current signal in major loop by signal transformer; By the external demonstration Keysheet module of adjusting, set different electric current and voltage setting values, select the three section protection curve of different range; Taking arm processor S3C2440 as basis, the inner data processing platform (DPP) containing embedded UC/OS-II operating system, use IEC61850 communication protocol and electrical network wall to carry out exchanges data by Ethernet interface, in the time there are the abnormal conditions such as excessive, the short circuit of wink streaming current or overload, ARM will send fault detect output signal, and after power amplification to the executive component processing of threading off, after trouble shooting, just can reset.