CN202133725U - 48V breaker simulation box with anti-tripping function - Google Patents

Abstract

A 48V powered breaker simulation box with an anti-tripping function is especially used for testing of a distribution network protection device, and mainly consists of a tripping/closing loop, a time-delay anti-interference loop, an energy dissipating loop and an anti-tripping loop. The 48V breaker simulation box comprises: a lockup relay CGJ for performing simulation of tripping/closing motions, capacitors C1 and C2 for performing time-delay anti-interference processes, energy dissipating resistors R2, R3, R5, and R6 for increasing a starting power, and a relay TBJV2 for realizing the anti-tripping function. The 48V breaker simulation box can completely simulate process of the breaker motions, and has the advantages of time-delay anti-interference capacity, large starting power, anti-tripping function, etc., thereby effectively ensuring accuracy of experiment results and safety of testing equipment.

Description

Be with anti-jump function 48V isolating switch simulation box

Technical field

The utility model relates to the electric system power distribution automation, particularly relates to the under-voltage circuit breaker simulation box equipment that is used for the distribution automation device to test.

Background technology

Primary cut-out is the visual plant in the power network, is important protection equipment, is connected between first and second equipment, and it is responsible for switching on and off zero load and load current in the high-tension circuit under the correct situation.When system breaks down, can match with protective device and aut.eq., cut off electric current rapidly, the accident that prevents enlarges, thereby guarantees system safety operation.Develop in protection and aut.eq., in the test process; All need close signal from the jumping of isolating switch; But isolating switch costs an arm and a leg, the simulated failure difficulty, and also each the jumping closed the life-span that all can influence isolating switch; So we need the isolating switch simulation box to simulate this process, for protective device provides real test environment.

Distribution automation is in the starting stage in China, and domestic just the beginning carries out pilot in some cities, estimates that the five-year will be the peak period that distribution automation is transformed.Power distribution network is as last link of electrical power trans mission/distribution system, and its degree that realizes robotization is closely related with the q&r that supplies electricity consumption, is one of important foundation of intelligent grid.In distribution network systems, be different from transformer station and generating plant, its electric pressure and power supply mode are all different.Its supply voltage is generally 48V, and the isolating switch simulation box voltage that in the past is used for the substation equipment test then is 110V or 220V, so be badly in need of wanting the isolating switch simulation box of a kind of 48V.For protection equipment, the isolating switch simulation box with 48V of anti-jump function becomes one of indispensable equipment of distribution automation testing of equipment stage simultaneously.

The utility model content

The purpose of the utility model provides a kind of isolating switch simulation box with 48V power supply of anti-jump function, is used for the equipment of distribution automation device to test.

The purpose of the utility model reaches like this:

A kind ofly be with anti-jump function 48V isolating switch simulation box, it links to each other with the distribution protective device, and state is closed in the jumping that simulates isolating switch, it by jumping close the loop, the anti-interference loop of delaying time, energy dissipating loop and anti-jump loop form (like Fig. 1).

Like Fig. 2:

The chief component that the loop is the utility model is closed in jumping, realizes isolating switch is jumped the analog functuion of closing.It is by relay ZJ, ZJ2, TBJV, latch-in relay CGJA, and sustained diode 3, D4, D5, D6, D7, current-limiting resistance R4 forms.Fly-wheel diode is connected in parallel on the two ends of coil as the bleed off loop of relay, and coil can produce induction electromotive force at its two ends through electric current the time.When current vanishes, its induction electromotive force can produce reverse voltage to the original paper in the circuit.The fly-wheel diode and the coil that are connected in parallel on the coil two ends can constitute the loop, consume the energy of generation, thus the safety of other original paper in the holding circuit.Latch-in relay CGJA is an actuating relay, is responsible for the simulation jumping and closes action.After the closing pulse signal was imported from the HZ end, because TTBJV2C and ZJC node are in normally off, signal can directly drive the CGJA action; This moment, its node CGJC was closed; ZJA, ZJ2A action, the ZJ2B node is closed, and the ZJ2C node breaks off; Form the loop with external protector, the output switching signal.Simultaneously, the ZJB node is closed.Because the latch-in relay that CGJA uses, so after closing pulse disappeared, its node state remained unchanged.After the tripping operation pulse signal was imported from the TZ end, this moment, the ZJB node was closed, so trip signal can directly drive TBJVA and CGJA action, so the CGJC node breaks off, ZJA and ZJ2A discharge, corresponding node ZJC disconnection, and ZJ2B is closed, and ZJ2C breaks off.Through ZJC and ZJ2B node and external device (ED) formation loop, output trip signal.

The anti-interference loop of delaying time is made up of C1 and C2, when switching signal when the HZ port is imported, at first will charge to C1; In charging process; The voltage at CGJA closing coil two ends slowly rises with the electric current that flows through, and before the minimum current that does not reach the relay adhesive, relay can not move.After charging is accomplished, closing coil voltage and electric current will reach the minimum value of the actuating of relay, actuating of relay this moment.The utility model plays the effect of time-delay in this way, thereby strengthens antijamming capability.In like manner, when trip signal when the TZ port is imported, equally play the jamproof effect of time-delay through charging modes.

The energy dissipating loop is made up of R2, R3, R5, R6.Wherein R2, R3 are the energy dissipating resistance of CGJA closing coil, and R5, R6 are the energy dissipating resistance of CGJA breaking coil.When signal arrived, energy dissipating resistance can bear most of electric current, played the purpose that increases starting power.

Anti-jump loop is made up of TBJV2A, TBJVC, TBJV2B, D1, D2, R1.The anti-jump combined floodgate contact that prevents because of CS or aut.eq. that is meant fails in time to return, and causes isolating switch constantly to be jumped and closes.Anti-jump function is realized by relay TBJV2 that mainly after the input of tripping operation pulse signal, TBJVA moves, and TBJVC is closed, the TBJV2A action, and TBJV2B is closed.If this moment, the switching signal loop still kept switching signal because of failure and other reasons, signal will be kept the TBJV2A action through TBJV2B node and D2, make TBJV2C remain disconnection, cut off the path of switching signal startup CGJA, play anti creep performance.Wherein R1 is a current-limiting resistance, and the electric current of relay TBJV2A is flow through in restriction, the protection coil.D1 is the bleed off diode of TBJV2A.D2 flows into the HZ end for preventing KM+.

Description of drawings

Fig. 1 is the block diagram of simulation box, and wherein Sinal closes the loop for jumping, and Delay is the anti-interference loop of time-delay, Consume-energy dissipating loop, and FT-anti-jump loop, HWJCOMM-close a signal common port; HWJ-closes a signal output part; TWJCOMM-jumps position signal common port; TWJ-jumps the position signal output part;

Fig. 2 is the electrical schematic diagram of simulation box, wherein KM+: positive source property end, DC48V; KM-: power-polarity end; HWJCOMM: close a signal common port; HWJ: close a signal output part; TWJCOMM: jump position signal common port; TWJ: jump the position signal output part; ZJA, ZJB are same relay, and wherein ZJA is an actuating coil, and ZJB is corresponding node; ZJ2A, ZJ2B, ZJ2C are same relay, and wherein ZJ2A is an actuating coil, and ZJ2B, ZJ2C are corresponding node; TBJVA, TBJVC are same relay, and wherein ZJA is an actuating coil, and ZJB is corresponding node; TBJV2A, TBJV2B, TBJV2C are with relay, and wherein TBJV2A is an actuating coil, and TBJV2B, TBJV2C are corresponding node; CGJA, CGJC are same relay, and wherein CGJA is a latch-in relay, and the end that links to each other with HZ is actuating coil, and the end that links to each other with TZ is for returning coil.During the actuating coil operation, CGJC is closed; When returning coil motion, CGJC breaks off; When not having any signal, CGJC keeps current state;

Embodiment

Referring to Fig. 2, the entire circuit principle is following:

When the closing pulse signal when the HZ port is imported, drive the CGJA action, its node CGJC is closed, so ZJA and ZJ2A action, the node ZJ2B of ZJ2A is closed, ZJ2C breaks off, and forms the loop with external protector, the transmission switching signal.

When the tripping operation pulse signal from TZ when input end, because the ZJA action, so ZJB is in closure state; Trip signal can directly drive TBJVA and CGJA action; So the CGJC node breaks off, ZJA and ZJ2A discharge, and the ZJ2B node breaks off, the ZJ2C node is closed; Form the loop with external protector, send trip signal.Meanwhile, ZJC is closed, and TBJVC is closed, TBJV2A action, TBJV2B node respective closed.If this moment, still there was switching signal in HZ end fault, TBJV2A can keep action through the loop that TBJV2B and D2 constitute so, plays anti-jump function thereby break off node TBJV2C.If the HZ end is in proper working order, TBJV2A is failure to actuate, and TBJV2C is closed, with the path that can not cut off the closing pulse signal.

Claims (2)

1. the isolating switch simulation box of the 48V power supply with anti-jump function is used for the test of distribution automation device, it is characterized in that by jumping close the loop, the anti-interference loop of delaying time, energy dissipating loop and anti-jump loop form; Jumping close the loop respectively with time-delay anti-interference loop, energy dissipating loop, anti-jump loop connects; For: 1) jumping is closed the loop by relay ZJ, ZJ2, TBJV, latch-in relay CGJA, sustained diode 3, D4, D5, D6, D7, current-limiting resistance R4 constitutes; 2) the anti-interference loop of time-delay is made up of 3 C1 and C2) the energy dissipating loop is made up of R2, R3, R5, R6; 4) anti-jump loop is made up of TBJV2A, TBJVC, TBJV2B, D1, D2, R1.

2. isolating switch simulation box as claimed in claim 1; It is characterized in that: have latch-in relay CGJ and carry out the breaker tripping and closing action simulation; Has capacitor C 1 and the C2 anti-interference process of delaying time; Have energy dissipating resistance R 2, R3, R5, R6 and increase starting power, have relay TBJV2 and realize anti-jump function; Function is realized by following structure:

1) jumping is closed the loop by relay ZJ, ZJ2, TBJV, latch-in relay CGJA, and sustained diode 3, D4, D5, D6, D7, current-limiting resistance R4 forms; Fly-wheel diode is connected in parallel on the two ends of coil as the bleed off loop of relay, and coil can produce induction electromotive force at its two ends through electric current the time; When current vanishes, its induction electromotive force can produce reverse voltage to the original paper in the circuit; The fly-wheel diode and the coil that are connected in parallel on the coil two ends can constitute the loop, consume the energy of generation, thus the safety of other original paper in the holding circuit; Latch-in relay CGJA is an actuating relay, is responsible for the simulation jumping and closes action; After the closing pulse signal was imported from the HZ end, because TTBJV2C and ZJC node are in normally off, signal can directly drive the CGJA action; This moment, its node CGJC was closed; ZJA, ZJ2A action, the ZJ2B node is closed, and the ZJ2C node breaks off; Form the loop with external protector, the output switching signal; Simultaneously, the ZJB node is closed; Because the latch-in relay that CGJA uses, so after closing pulse disappeared, its node state remained unchanged; After the tripping operation pulse signal was imported from the TZ end, this moment, the ZJB node was closed, so trip signal can directly drive TBJVA and CGJA action, so the CGJC node breaks off, ZJA and ZJ2A discharge, corresponding node ZJC disconnection, and ZJ2B is closed, and ZJ2C breaks off; Through ZJC and ZJ2B node and external device (ED) formation loop, output trip signal;

2) the anti-interference loop of time-delay is made up of C1 and C2, when switching signal when the HZ port is imported, at first will charge to C1; In charging process; The voltage at CGJA closing coil two ends slowly rises with the electric current that flows through, and before the minimum current that does not reach the relay adhesive, relay can not move; After charging is accomplished, closing coil voltage and electric current will reach the minimum value of the actuating of relay, actuating of relay this moment; Play the effect of time-delay in this way, thereby strengthen antijamming capability; In like manner, when trip signal when the TZ port is imported, equally play the jamproof effect of time-delay through charging modes;

3) the energy dissipating loop is made up of R2, R3, R5, R6; Wherein R2, R3 are the energy dissipating resistance of CGJA closing coil, and R5, R6 are the energy dissipating resistance of CGJA breaking coil; When signal arrived, energy dissipating resistance can bear most of electric current, played the purpose that increases starting power;

4) anti-jump loop is made up of TBJV2A, TBJVC, TBJV2B, D1, D2, R1; Anti-jump function is realized by relay TBJV2 that mainly after the input of tripping operation pulse signal, TBJVA moves, and TBJVC is closed, the TBJV2A action, and TBJV2B is closed; If this moment, the switching signal loop still kept switching signal because of failure and other reasons, signal will be kept the TBJV2A action through TBJV2B node and D2, make TBJV2C remain disconnection, cut off the path of switching signal startup CGJA, play anti creep performance; Wherein R1 is a current-limiting resistance, and the electric current of relay TBJV2A is flow through in restriction, the protection coil; D1 is the bleed off diode of TBJV2A; D2 flows into the HZ end for preventing KM+.

Images