CN202488106U

CN202488106U - Comprehensive protecting and monitoring device of microcomputer

Info

Publication number: CN202488106U
Application number: CN2012200616217U
Authority: CN
Inventors: 邵建国; 管瑞良; 殷建强; 顾海峰; 黄震; 孙芝雨
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2012-02-24
Filing date: 2012-02-24
Publication date: 2012-10-10
Anticipated expiration: 2022-02-24

Abstract

The utility model discloses a comprehensive protecting and monitoring device of a microcomputer. The comprehensive protecting and monitoring device is used for relay protection of electrical equipment and comprises a main control circuit, a display and keyboard circuit, a sampling circuit, a switch value input circuit, a switch value output circuit, a communication circuit and an auxiliary power supply circuit which supplies power for the circuits, wherein the main control circuit comprises a digital signal processor (DSP), a microprocessor unit (MPU) and a complex programmable logic device (CPLD) which are connected with one another by buses; the sampling circuit is connected with the DSP by an analog/digital (A/D) conversion circuit; the switch value input circuit and the switch value output circuit are connected with the CPLD; the communication circuit and the display and keyboard circuit are connected with the MPU. The comprehensive protecting and monitoring device fully utilizes the characteristics of the DSP, the MPU and the CPLD and can realize flexible configuration of the number of lines of peripheral analog quantity, switch value collection, switch value output and the like.

Description

A kind of computer integrated protection measure and control device

Technical field

The utility model relates to a kind of computer integrated protection measure and control device, is used for the relaying protection of electric equipments such as high-voltage alternating asynchronous motor.

Background technology

Along with the develop rapidly of national economy, the high-voltage alternating asynchronous motor has obtained using widely in industrial and mining enterprises.But this type of high-voltage motor is in case damage will cause enterprise to stop completely, and maintenance cycle is long, expense is high, causes bigger influence to production.And this type of high-voltage motor often operates in the ground adverse circumstances such as high temperature, dirt are many; Damage of bearings takes place easily; Rotor wipes fault mutually and mechanical overload causes the motor windings ageing of insulation, the phase fault of stator winding, faults such as turn-to-turn short circuit and single-phase earthing.Handle like untimely discovery, in case motor damages, direct threats safety and production, causes bigger loss to enterprise, therefore must take Microcomputer Protection.

Early stage traditional microcomputer protective relay device adopts single microprocessor MCU structure, analog quantity input, switching value input, switching value output, man-machine interface and order circuit be affiliated to the MCU main system walk abreast or universal serial bus on.Heavy tasks such as operation that microprocessor MCU main system execution analog acquisition and calculating, switching value input are gathered, logic determines is handled (being defencive function), switching value output driving, man-machine interface and communication.This makes this structure in the real-time of analog quantity precision, temporal resolution, man-machine interface with can not take into account fully between the several tasks of communication fast, and system extension property is poor.The product of typing can not increase the analog quantity and the switching value of collection easily, can not increase delivery outlet easily.

Development along with technology; Conflict for contention resource between each function of microcomputer protective relay system that solves single microprocessor MCU structure; And satisfy along with power system development to such device mass data disposal ability, complex analyses algorithm, and the requirement of advanced communication aspects; The protection system that two MCU even many MCU hardware configuration have occurred comprises several kinds of combinations such as microprocessor MCU and microprocessor MCU, microprocessor MCU and digital processing unit DSP, digital processing unit DSP and digital processing unit DSP.Wherein the structure of microprocessor MCU+ digital processing unit DSP is more commonly used, and microprocessor MCU accomplishes total starting element and the man-machine interface and the communication function of protective device, and digital processing unit DSP accomplishes the calculation function of data acquisition and various components.But this scheme still not can be good at solving the flexible configuration problem of externally enclosing number of, lines such as analog acquisition, switching value input, switching value output.

The utility model content

The utility model technical problem to be solved is to overcome the deficiency of prior art; A kind of computer integrated protection measure and control device is provided; Be used for the relaying protection of electric equipment, can be good at solving the flexible configuration problem of externally enclosing number of, lines such as analog acquisition, switching value input, switching value output.

The thinking of the utility model is to make full use of digital processing unit (DSP), microprocessor (MPU), programmable logic device (CPLD) characteristics separately, propose that a kind of three combines closely the relaying protection framework.Particularly, the utility model adopts following technical scheme:

A kind of computer integrated protection measure and control device comprises governor circuit, demonstration and keyboard circuit, sample circuit, switching value input circuit, switching value output circuit, telecommunication circuit, and is the auxiliary power circuit of above-mentioned each parts power supply; Said governor circuit comprises digital processing unit, microprocessor, the programmable logic device that connects through bus each other; Sample circuit is connected with said digital processing unit through the A/D change-over circuit, and switching value input circuit, switching value output circuit are connected with programmable logic device, and telecommunication circuit, demonstration and keyboard circuit are connected with microprocessor.

Preferably, said sample circuit comprises current transformer circuit and/or voltage transformer circuit.

When adopting technique scheme, digital processing unit DSP accomplishes the calculation function of various electric parameter data acquisitions and various components, and gives microprocessor MPU with related data and handle; Microprocessor MPU be correlated with the protection etc. processing; Programmable logic device (CPLD) is realized the collection and the output of demonstration, switching value.Like this, utilize the stronger data-handling capacity of digital processing unit dsp chip to realize real-time collection, analysis, the calculating of data on the one hand, the complexity that reduces software design is to improve reliability; On the other hand, expanded function can be accomplished by the microprocessor MPU of more being good at functions such as network service, man-machine interface; Programmable logic device (CPLD) then can be realized the complex logic function through software programming, with can be good at solving the flexible configuration problem of externally enclosing number of, lines such as analog acquisition, switching value input, switching value output constantly.

Description of drawings

Fig. 1 is the computer integrated protection measure and control device structural representation of the utility model;

Fig. 2 is for showing and keyboard circuit;

Fig. 3 is an auxiliary power circuit;

Fig. 4 is a current transformer circuit;

Fig. 5 is a voltage transformer circuit;

Fig. 6 is the switching value input circuit;

Fig. 7 is the switching value output circuit;

Fig. 8 is a telecommunication circuit;

Fig. 9 is the A/D change-over circuit;

Figure 10 is the digital processing unit circuit;

Figure 11 is the digital processing unit peripheral circuit;

Figure 12 is a PLD;

Figure 13 is a micro-processor interface circuit;

Figure 14 is a microprocessor peripheral circuit.

Embodiment

Be elaborated below in conjunction with the technical scheme of accompanying drawing to the utility model:

The computer integrated protection measure and control device of the utility model; As shown in Figure 1; Comprise governor circuit, demonstration and keyboard circuit, sample circuit, switching value input circuit, switching value output circuit, telecommunication circuit, and be the auxiliary power circuit of above-mentioned each parts power supply; Said governor circuit comprises digital processing unit DSP, microprocessor MPU, the programmable logic device (CPLD) that connects through bus each other; Sample circuit is connected with said digital processing unit through the A/D change-over circuit, and switching value input circuit, switching value output circuit are connected with programmable logic device, and telecommunication circuit, demonstration and keyboard circuit are connected with microprocessor.In this embodiment, sample circuit comprises current transformer circuit, voltage transformer circuit.

Auxiliary power circuit provides power supply for whole device; Governor circuit carries out computing to the data that current transformer circuit, voltage transformer circuit, switching value input circuit provide; Show and the demonstration of keyboard circuit completion man-machine interface, keyboard input processing and setting value setting; Through the address data bus real-time, interactive data of microprocessor, governor circuit judges whether to satisfy fault (or warning) condition according to setting value, when satisfying condition between governor circuit and demonstration and the keyboard circuit; Corresponding output relay action stores relative recording in above-mentioned protection process simultaneously in the governor circuit control switch amount output circuit.

Demonstration and keyboard circuit are as shown in Figure 2.By the push-button array that button is formed, behind the process programmable logic device (CPLD) dynamic scan, the key value signal of acquisition; Giving MCU through programmable logic device (CPLD) data/address bus D [31..0] handles; In addition, the needed control signal of liquid crystal display, data-signal are also sent into programmable logic device (CPLD) by data/address bus D [31..0]; Transferring to X1, X1 is the liquid crystal socket.

Auxiliary power circuit is as shown in Figure 3; Its outside DC220V accessory power supply is through port one; 2 access devices; Is the needed operating voltage of device by the P1 power module with outside DC220V voltage transitions, supplies with late-class circuit and uses, and 3.3V voltage obtains (not drawing among the figure) by the 5V voltage of P1 power module output through change-over circuit simultaneously.

In this execution mode, sample circuit comprises current transformer circuit and voltage transformer circuit.Current transformer circuit is as shown in Figure 4, and foreign current instrument transformer secondary connection end is through port Ia, and the Ia` access device is inner, through the conversion of T1 current transformer; The sampling of R1 sampling resistor, C1, R2; After the filter network filtering that C2 forms, obtain an analog sampling signal IA, send into governor circuit.Voltage transformer circuit is as shown in Figure 5, and external voltage instrument transformer secondary connection end is through port Ua, and the Un access device is inner, through the conversion of T2 voltage transformer, and C3, R3 after the filter network filtering that C4 forms, obtains an analog sampling signal UA, sends into governor circuit.

The switching value input circuit is as shown in Figure 6, and the port one place connects outside DC220V anode, and port 2 places connect outside DC220V negative terminal; Through resistance R 18, after optocoupler N9 forms a current circuit, make the A1 terminal potential change; After N11 isolates, supply with late-class circuit and judge external switch amount input state;

The switching value output circuit is as shown in Figure 7, after light lotus root N10 2 pin obtain a low level signal ,+3.3V; R23, light lotus root N10 interior light emitting diodes, and form a current circuit between the light lotus root N10 2 sole level; Make optocoupler N10 work, therefore, the inner triode conducting of optocoupler; Form a current circuit between feasible+24V and the 24V ground, relay K 3 actions, output switching value; K4-3, K4-4 can connect the external switch auxiliary contact, externally after the switch motion; K4-3 between the K4-4 is+the DC220V power supply, after resistance R 8 current limlitings; Relay K 4 actions make

contact

5,6 connect; Level optocoupler N7 conducting simultaneously in back makes the 4 pin current potentials of N7 change, and send late-class circuit to judge the running-active status of opening the light.

Telecommunication circuit is as shown in Figure 8; Wherein 3 pin of integrated circuit N1,6 pin, 7 pin are connected to the governor circuit single-chip microcomputer respectively, and 12 pin, 13 pin of N1 are connected to external communication interface, send order through single-chip microcomputer; After the N1 conversion, realize communicating by letter with 485 of outside host computer.

Fig. 9 is the A/D change-over circuit; Figure 10 is the digital processing unit circuit; Figure 11 is the digital processing unit peripheral circuit;

Figure 12 is a PLD; Figure 13 is a micro-processor interface circuit; Figure 14 is a microprocessor peripheral circuit.

The current sampling signal IA that current transformer circuit obtains, and the sampled voltage signal UA of voltage transformer circuit acquisition carry out analog-to-digital conversion through sending into A/D converter behind the voltage follower N2; Digital signal after the conversion is sent into digital processing unit DSP computing through data/address bus DD [15..0]; Data after the processing are sent into microprocessor MPU through HPI interface HD [7..0] again, and microprocessor MPU is carried out relevant protection computing according to the data that obtained; When satisfying fault condition; Send trip signal, trip signal is sent into programmable logic device (CPLD) through data/address bus D [31..0], and programmable logic device (CPLD) is according to the data-signal that is obtained; Send related command to switching value output circuit, realize switching value output.The data that switching value input circuit 6 is obtained are sent into programmable logic device (CPLD), send into microprocessor MPU through data/address bus D [31..0] again, judge external switch amount state by the microprocessor microprocessor MPU; N9, N10 are digital processing unit DSP outer extension memory, are used for program running; Storage etc., N32, N33; N34 is the microprocessor MPU outer extension memory, is used for program running equally, storage etc.;

This computer integrated protection measure and control device has three sections specified time overcurrent protections, unbalance protection, overload protection, overtemperature protection, zero sequence overcurrent protection, zero sequence overvoltage protection, under-voltage protection, overvoltage protection, non electrical quantity protection, overcurrent blocking function, low-voltages and starts functions such as blocking function, electric motor starting logic blocking function, electric motor starting controlled function, PT continuity test, remote control, remote measurement, remote signalling.

This computer integrated protection measure and control device also has perfect event report processing capacity, can preserve 16 times up-to-date electric motor starting records, 16 times up-to-date tripping operation records, 16 times up-to-date failure wave-recording records, up-to-date 64 remote signalling record, 64 times up-to-date alarm loggings.

Claims

1. a computer integrated protection measure and control device comprises governor circuit, demonstration and keyboard circuit, sample circuit, switching value input circuit, switching value output circuit, telecommunication circuit, and is the auxiliary power circuit of above-mentioned each parts power supply; It is characterized in that said governor circuit comprises digital processing unit, microprocessor, the programmable logic device that connects through bus each other; Sample circuit is connected with said digital processing unit through the A/D change-over circuit, and switching value input circuit, switching value output circuit are connected with programmable logic device, and telecommunication circuit, demonstration and keyboard circuit are connected with microprocessor.

2. computer integrated protection measure and control device according to claim 1 is characterized in that said sample circuit comprises current transformer circuit and/or voltage transformer circuit.