CN104659908A

CN104659908A - Comprehensive automation device

Info

Publication number: CN104659908A
Application number: CN201410275169.8A
Authority: CN
Inventors: 吴春刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-06-19
Filing date: 2014-06-19
Publication date: 2015-05-27

Abstract

The invention discloses a comprehensive automation device, and relates to the technical field of electric power system control equipment. The comprehensive automation device comprises a main module, an input module, an output module, a power supply module and a management module, wherein the main module consists of single-chip microcomputers; the input module is provided with an AC voltage signal converter; the output module comprises a driving circuit, a divide-shut brake control circuit, a divide-shut brake monitoring circuit, a tripping prevention loop and a control power supply monitoring circuit; the management module consists of single-chip microcomputers; the management module is connected with the main module through serial connection communication of the single-chip microcomputers; the input module, the output module and the power supply module are connected with the main module through a substrate. By adopting the comprehensive automation device, the problems that a small-sized transformer substation is high in operation cost and low in economic benefit are solved.

Description

Integrated automation device

Technical field

The present invention relates to controlling apparatus of electric power system technical field, especially a kind of integrated automation device for 35 kv substations.

Background technology

More existing old Small Substations; station equipment is various switchboard such as, relay-set, control flow; control desks etc. are many; wiring is complicated, and staff is many, once break down; difficulty is searched in fault point; so operation expense is high, economic benefit is low, has been not suitable with sending out of situation and has belonged to needs.

Summary of the invention

The object of this invention is to provide a kind of integrated automation device, it is high that it can solve old Small Substation operation expense, the problem that economic benefit is low.

In order to solve the problem, the technical solution used in the present invention is: this integrated automation device, comprise the primary module be made up of single-chip microcomputer, be provided with the input module of alternating current, voltage signal converter, comprise drive circuit, divide-shut brake controls, divide-shut brake monitors, anti-jump loop, controls the output module of power supply monitoring circuit, power module and the administration module be made up of single-chip microcomputer; Described administration module is connected with described primary module through singlechip serial communication, described input module, output module, and power module is connected with described primary module by substrate.

In technique scheme, more specifically scheme can also be: the single-chip microcomputer of described primary module is 16 embedded 87C196NT single-chip microcomputers.

Further: described power module is switching power supply.

Further: the single-chip microcomputer of described administration module is embedded 89C51RD+ single-chip microcomputer.

Owing to have employed technique scheme, the present invention compared with prior art, the beneficial effect had is: owing to have employed, advanced computer technology, modern electronic technology, the communication technology and the information processing technology etc. reconfigure the function of substation equipment, optimal design, to the ruuning situation execution monitoring of transformer station's armamentarium, measurement, control and coordination, complete substation operation monitoring and controlling task, instead of transformer station's conventional equipment, letter is for substation secondary wiring, so, reduce operation expense, improve economic benefit.

Accompanying drawing explanation

Fig. 1 is block diagram of the present invention.

Fig. 2 is primary module electrical principle block diagram.

Fig. 3 is administration module electrical principle block diagram.

Embodiment

Below in conjunction with drawings and Examples, the invention will be further described:

Integrated automation device shown in Fig. 1, comprise the primary module 1 be made up of 16 embedded 87C196NT single-chip microcomputers, be provided with the input module 2 of alternating current, voltage signal converter, comprise drive circuit, divide-shut brake controls, and divide-shut brake monitors, anti-jump loop, control the output module 3 of power supply monitoring circuit, power module 4 and the administration module 5 be made up of embedded 89C51RD+ single-chip microcomputer; Administration module 5 is connected with primary module 1 through singlechip serial communication, input module 2, output module 3, and power module 4 is connected with primary module 1 by substrate 6.

Power module 4 is a wide voltage stabilizing, high jamproof plate switch stabilized voltage power supply; Additional working power 220 volts (exchanging or direct current) is transformed into 5 volts, positive and negative 12 volts, 24 volts low-voltage dc power supplies, for the single-chip microcomputer in device and interface circuit provide power supply through power module 4.

Administration module 5 is in fact an Intelligent Human-Machine Interface, receives keyboard commands in I/O mode, drives LCD display and indicator light, realizes human-computer dialogue; With the single-chip microcomputer exchange message of serial communication mode and primary module 1, Fig. 3.

Operation principle: one, signal sampling

A, analog signal are sampled: the rated value sent here by system voltage instrument transformer, current transformer is 0 ~ 57.7(100) lie prostrate and 0 ~ 5 alternating voltage, the current signal of pacifying, after the voltage on input module 2, power pack are isolated and be transformed into low voltage signal, deliver to each input of multi-channel A/D device transducer.The 87C196NT single-chip microcomputer of primary module 1 starts A/D conversion under sampling routine controls, and each analog channel A/D transformation result is read in single-chip microcomputer, Fig. 2.

B, switching value are read in: each switch state signal, after the interface circuit on primary module 1 and Phototube Coupling, is read at a high speed by single-chip microcomputer.

C, frequency signal read in: busbar voltage and line voltage distribution are transformed into after low voltage signal through voltage changer, square-wave signal is transformed into again by zero-crossing comparator, these two square-wave signals are read in by the high speed timing entrance of the single-chip microcomputer of primary module 1, the adjacent rising time of the lower square wave two-phase of meter is the cycle of voltage, and the time difference between busbar voltage square wave and periodic voltage square wave rising edge is the phase difference of two voltages.

Two, signal transacting

The process of a, alternating current, voltage signal: the electric current, the voltage sample value that are converted to through A/D, after fourier-transform, can obtain phase induced current, the effective value of voltage and phase difference.Protective current and voltage differentiate protection act for defence program.Voltage and measurement current value, after angle compensation, can obtain active-power P, reactive power Q, power factor COS φ.P, Q can be obtained meritorious, idle electric degree to time integral.

B, switch state signal process: through the switch state signal read at a high speed, after software filtering, obtain the information such as each on off state and displacement time.

C, frequency signal process: each time signal obtained of sampling, can obtain frequency and phase signal through computing.

Three, protection philosophy

A, route protection: the route protection of 35 kilovolts and following electric pressure is electric current, voltage protection, the electric current obtained according to sampling, the effective value of voltage signal, phase relation and protection seting value, relaying configuration differentiate whether this circuit or adjacent lines jeopardize the fault of this line facility safety.As occurred, then according to the order of severity of fault, instantaneous or time delay sends action command, excises, faulty component to ensure the safety of system and this line facility.

B, main transformer protection: according to effective value, switch state signal and protection seting value, the relaying configuration such as phase relation and main transformer gas, temperature of main transformer high and low pressure side electric current, voltage, differentiate whether main transformer self breaks down and whether system jeopardizes the fault of main transformer safe operation.As broken down, send action command, main transformer is excised by system, to ensure main transformer safety, prevent main transformer from damaging or making failure propagation.

C, electric capacity are protected: 10 kilovolts of building-out capacitors are also voltage, current protection, according to voltage, current effective value that sampling obtains, differentiate whether electric capacity has fault or system operational parameters entail dangers to capacitive safety.Then send action command if any fault, capacitor is excised by system, with anti-tamper electric capacity or make failure propagation.

D, distribution become protection: the distribution for Y/Y0 connection becomes or station becomes; according to original edge voltage, electric current that sampling obtains; former, pay limit zero-sequence current and the signal such as gas, temperature, differentiate whether transformer itself breaks down, whether short circuit or the overload of outside, its pair of limit.As broken down then according to fault severity level, instantaneous or time delay disconnects former limit circuit breaker, is excised by transformer by system, in order to avoid damage transformer or make transformer fault expand.

E, motor protection: the operational factor such as motor voltage, mains side electric current and zero-sequence current obtained according to sampling, differentiate whether motor is short-circuited, overload, stall and fault or the abnormal operating condition such as operating voltage is too low.As broken down, then according to the order of severity of fault, time delay or instantaneous by motor excision, to ensure the safety of motor.

F, motor main protection: the information such as the motor voltage obtained according to sampling, mains side and neutral point current, residual voltage, zero-sequence current, exciting voltage, exciting current; differentiate whether motor itself stator or rotor windings short-circuit or ground connection occur, and whether the abnormal operating condition such as overload, loss of excitation, excitation unit fault or step-out occur.As occurred, then according to the extent of injury of fault to motor, instantaneous or time delay disjunction motor main circuit breaker and field switch, to ensure the safety of motor.

Four, control principle

This device, according to different control object, is designed with the automatic control functions such as automatic low-frequency load reduction, small current earthing wire-selecting, overload warning and separating brake, bus overvoltage, voltage transformer disconnection warning respectively.

The carrying out judgement system according to the parameter such as system running current, busbar voltage, residual voltage, zero-sequence current being all device collection and whether normally run of various controlling functions, whether equipment has fault.As there is the fault such as single-phase earthing or voltage transformer disconnection, then first report to the police.During single-phase earthing, ground path should be excised through time delay.As system operational parameters parameter exceedes allowed band, then send alarm signal, and can separating brake be set; When operational factor is recovered normal, automatic closing also can be set to restore electricity.

Claims

1. an integrated automation device, it is characterized in that: comprise the primary module be made up of single-chip microcomputer, be provided with the input module of alternating current, voltage signal converter, comprise drive circuit, divide-shut brake controls, and divide-shut brake monitors, anti-jump loop, control the output module of power supply monitoring circuit, power module and the administration module be made up of single-chip microcomputer; Described administration module is connected with described primary module through singlechip serial communication, described input module, output module, and power module is connected with described primary module by substrate.

2. integrated automation device according to claim 1, is characterized in that: the single-chip microcomputer of described primary module is 16 embedded 87C196NT single-chip microcomputers.

3. integrated automation device according to claim 1 and 2, is characterized in that: described power module is switching power supply.

4. integrated automation device according to claim 1 and 2, is characterized in that: the single-chip microcomputer of described administration module is embedded 89C51RD+ single-chip microcomputer.