Simulation circuit breaker

Abstract

The utility model belongs to the technical field of electric power engineering, and particularly relates to an analog circuit breaker. The system comprises a CPU control unit, and the CPU control unit is connected with a storage battery. The input module is connected with the CPU control unit and comprises a DTU input module, a permanent magnet input module, an input module and a monitoring input module; the switching signal output module is connected with the CPU control unit; and the alternating current output module is connected with the CPU control unit. According to the utility model, the problem that the types of detection signals at the input end of the analog circuit breaker are few and incomplete is solved, the input module can detect various signals of a controller composed of various mechanisms such as a DTU debugging loop and a permanent magnetic mechanism controller, and then the signals are input into the CPU control unit through isolation, voltage level conversion and the like realized by the photoelectric isolation module. Detection signals are comprehensive in type, the integration degree is high, an alternating current output module is configured, and a relay test can be carried out.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electric power engineering technical field, concretely relates to a simulation circuit breaker. BACKGROUND

[0002] The simulation circuit breaker is a device for the whole set test of the relay protection device or the relay protection screen of the electric power system, and can simulate the tripping and closing actions of the high-voltage circuit breaker and the related characteristics. The tripping and closing of the high-voltage circuit breaker are simulated during the whole set test, so as to avoid the adverse effects caused by the repeated tripping and closing of the circuit breaker. The simulation circuit breaker is suitable for the ring network cabinet, the switching station and the pole-mounted circuit breaker, and can truly simulate the electrical action characteristics of the circuit breaker.

[0003] At present, the tripping and closing power supply voltage of the common simulation circuit breaker is DC220V and DC110V, and the voltage must be selected to be consistent with the input voltage before the test. The simulation circuit breaker has fewer types of detected signals, and some accidents may occur due to the incorrect cooperation between the DTU (wireless terminal device) and the permanent magnet mechanism and the circuit breaker in some electric power distribution networks with the DTU and the permanent magnet mechanism. Therefore, the simulation detection needs to be carried out, but the current simulation circuit breaker cannot effectively detect the whole set device of the complex electric power distribution network with the DTU and the permanent magnet mechanism. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art, and provide a simulation circuit breaker, which is used to solve the problem of the few types of input detection signals of the simulation circuit breaker.

[0005] The technical scheme for solving the above technical problem is as follows: a simulation circuit breaker comprises:

[0006] A CPU control unit connected with a storage battery for providing power supply;

[0007] An input module connected with the CPU control unit, the input module comprises:

[0008] A DTU input module for receiving the tripping and closing signals of the DTU debugging loop;

[0009] A permanent magnet input module for receiving the tripping and closing signals of the permanent magnet mechanism controller;

[0010] An input module for receiving the tripping and closing signals of the protection device without monitoring loop;

[0011] A monitoring input module for receiving the tripping and closing signals of the protection device with monitoring loop;

[0012] The switch signal output module is connected with the CPU control unit and is used for outputting a switch signal corresponding to the signal of the input module.

[0013] The AC current output module is connected with the CPU control unit and is used for outputting a signal of a relay protection test.

[0014] Compared with the prior art, the above technical solution has the following beneficial effects:

[0015] The input module formed by the DTU input module, the permanent magnet input module and the monitoring input module can detect various signals of the controller composed of a DTU debugging loop, a permanent magnet mechanism controller and a protection device, etc. The CPU control unit judges how to act according to the received various signals, and specifically returns the action signal to the corresponding controller through the switch signal output module and the AC current output module. The detection signal type is comprehensive, the integration degree is high, the AC current output module is configured, the relay test can be performed, and an external relay protection tester is not needed.

[0016] On the basis of the above technical solution, the embodiments of the present application can also be improved as follows:

[0017] In an embodiment, the DTU input module comprises:

[0018] The disconnecting resistor R1 has one end connected with the disconnecting contact K1 of the DTU debugging loop and the other end connected with the disconnecting optical coupling input end, and is used for receiving the disconnecting signal of the DTU debugging loop;

[0019] The closing resistor R2 has one end connected with the closing contact K2 of the DTU debugging loop and the other end connected with the closing optical coupling input end, and is used for receiving the closing signal of the DTU debugging loop;

[0020] The positive power supply of the DTU input module is connected with the common end of the DTU debugging loop.

[0021] The positive power supply in the DTU input module is connected with the common end in the DTU debugging loop, so that when the passive empty node in the DTU debugging loop acts, the disconnecting contact K1 and the closing contact K2 representing the passive empty node can correspondingly generate signal transmission to the disconnecting resistor R1 and the closing resistor R2, and then send the signal to the CPU control unit through the disconnecting optical coupling and the closing optical coupling in the photoelectric isolation module, thereby completing the state reading of the DTU debugging loop.

[0022] In an embodiment, the permanent magnet input module comprises:

[0023] The disconnecting diode D1 has a positive electrode connected with the first output node of the permanent magnet mechanism controller, and a negative electrode connected with the disconnecting resistor R3 and the disconnecting optical coupling;

[0024] a closing diode D2, the anode of which is connected with the second output node of the permanent magnet mechanism controller, and the cathode of which is connected with a closing resistor R4 and a closing photo-coupler;

[0025] an opening diode D3, the anode of which is connected with the other end of the opening photo-coupler, and the cathode of which is connected with the second output node of the permanent magnet mechanism controller;

[0026] a closing diode D4, the anode of which is connected with the other end of the closing photo-coupler, and the cathode of which is connected with the first output node of the permanent magnet mechanism controller.

[0027] Since the permanent magnet mechanism controller outputs positive and negative signals and negative and positive signals in a cycle through the two output nodes thereof, the repeated positive and negative signals are sent into the opening resistor R3 and the closing resistor R4 through the diode D1 and the diode D2 respectively, and then form a loop through the diode D3 and the diode D4, so that the opening resistor R3 and the closing resistor R4 can be effectively read in both positive and negative states, and then sent into the CPU control unit through the photoelectric isolation module.

[0028] In an embodiment, the input module comprises:

[0029] an opening resistor R5, one end of which is connected with the opening contact K3 of the protection device without a monitoring circuit, and the other end of which is connected with the input end of the opening photo-coupler, for receiving the opening signal of the protection device without a monitoring circuit;

[0030] a closing resistor R6, one end of which is connected with the closing contact K4 of the protection device without a monitoring circuit, and the other end of which is connected with the input end of the closing photo-coupler, for receiving the closing signal of the protection device without a monitoring circuit.

[0031] The conventional opening signal and closing signal in the protection device without a monitoring circuit are connected through the input module, and then combined with the characteristics of the current flow range of the photoelectric isolation module, so that the corresponding resistance value is calculated, so that the input voltage signal can be effectively sent into the CPU control unit through the photoelectric isolation module between 24-220v.

[0032] In an embodiment, the monitoring input module comprises:

[0033] an opening resistor R7, one end of which is connected with the opening contact K5 of the protection device with a monitoring circuit, and the other end of which is connected with the input end of the opening photo-coupler, for receiving the opening signal of the protection device with a monitoring circuit;

[0034] A closing resistor R8, one end of which is connected with a closing contact K6 of a protection device with a monitoring circuit, and the other end of which is connected with a closing optical coupling input end, is used for receiving a closing signal of the protection device with the monitoring circuit.

[0035] A double coil magnetic holding module, the normally closed contact K7 and the split coil of which are connected in series between the opening resistor R7 and the opening contact K6, and the normally open contact K7 and the closing coil of which are connected in series between the closing resistor R8 and the closing contact K6.

[0036] By adding the double coil magnetic holding module, the two circuits in which the opening resistor R7 and the closing resistor R8 are located can be selectively turned on to correspond to the action characteristics in the protection device with the monitoring circuit.

[0037] In an embodiment, the opening contact K5 is connected in parallel with a voltage dividing resistor R9 at both ends, and the closing contact K6 is connected in parallel with a voltage dividing resistor R10 at both ends, which are used for dividing the voltage at both ends of the split coil or the closing coil, so that the voltage is less than the action voltage of the double coil magnetic holding module.

[0038] The two circuits are divided by the voltage dividing resistors, so that the double coil magnetic holding module cannot act due to the failure to reach the required action voltage, and only when the corresponding opening contact K5 or closing contact K6 is closed, the voltage dividing resistors are short-circuited, the voltage at both ends of the split coil or the closing coil reaches the action voltage, and the double coil magnetic holding module starts to act, realizes the selective closing of one of the two circuits, and further sends an opening signal or a closing signal to the CPU control unit.

[0039] In an embodiment, a charge and discharge protection circuit is connected between the battery and the CPU control unit. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0041] Figure 1 It is a whole principle block diagram of the present application.

[0042] Figure 2 It is a whole principle block diagram of the present application. Figure 1 It is an electrical diagram of the DTU input module.

[0043] Figure 3 It is an electrical diagram of the DTU input module. Figure 1 It is an electrical diagram of the permanent magnet input module.

[0044] Figure 4 It is an electrical diagram of the permanent magnet input module.Figure 1 The electrical diagram of the input module.

[0045] Figure 5 For Figure 1 The electrical diagram of the input module. DETAILED DESCRIPTION

[0046] The embodiments of the technical scheme of the utility model will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the utility model, and therefore only serve as examples, and cannot limit the protection scope of the utility model.

[0047] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the usual meaning understood by the technical personnel in the field of the utility model.

[0048] In the description of the present application, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0049] In addition, the terms "first", "second" and the like are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0050] In the present application, unless otherwise specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0051] For some power distribution networks with DTU (wireless terminal device) debugging loop, permanent magnet mechanism controller, conventional protection device without monitoring loop and some protection devices with monitoring loop, the following settings are made to realize the simulation circuit debugging of complex power distribution network.

[0052] As Figure 1As shown, the utility model provides a kind of analog circuit breaker, for being connected with the controller in distribution system, controller sends various signals into analog circuit breaker, analog circuit breaker includes: CPU control unit, input module, switch signal output module and alternating current output module, the battery for providing power supply is connected with the CPU control unit of the battery, wherein, the battery is connected with the CPU control unit between charge-discharge protection circuit.

[0053] The input module is connected with the CPU control unit by photoelectric isolation module, and the photoelectric isolation module can be realized by optocoupler.

[0054] The input module includes:

[0055] DTU input module, for receiving the on-off signal of DTU debugging circuit;

[0056] Permanent magnet input module, for receiving the on-off signal of permanent magnet mechanism controller;

[0057] Input module, for receiving the on-off signal of protection device without monitoring circuit;

[0058] Monitoring input module, for receiving the on-off signal of protection device with monitoring circuit;

[0059] Through the newly added DTU input module, permanent magnet input module and monitoring input module, the signals sent by DTU debugging circuit, permanent magnet mechanism controller and protection device can be read in addition to the conventional on-off signal, and the application range is wider.

[0060] The switch signal output module is connected with the CPU control unit, for outputting switch quantity signal corresponding to the signal of the input module, and the CPU control unit outputs corresponding switch signal output module after receiving the signal of the input module, and the switch signal is sent into the controller through the switch signal output module for verification.

[0061] In addition, it also includes alternating current output module, which is connected with the CPU control unit, for outputting the signal of relay protection test, and the alternating current output module can perform relay test without external relay protection tester, and the use of detection is more convenient.

[0062] The input module formed by setting the DTU input module, the permanent magnet input module and the monitoring input module can detect various signals of the controller composed of the DTU debugging circuit, the permanent magnet mechanism controller and the protection device, and then the photoelectric isolation module is used to realize isolation and voltage level conversion and input into the CPU control unit, and the CPU control unit judges how to act according to the received various signals, and the action signal is returned to the corresponding controller through the switch signal output module and the alternating current output module, the detection signal type is comprehensive, and the integration degree is high.

[0063] Specifically, the DTU input module comprises:

[0064] A split resistance R1, one end of which is connected with a split contact K1 of the DTU debugging circuit, so as to constitute a split circuit of the DTU, the other end of the split resistance R1 is connected with a split optical coupling input end in the photoelectric isolation module, for receiving a split signal of the DTU debugging circuit;

[0065] A close resistance R2, one end of which is connected with a close contact K2 of the DTU debugging circuit, so as to constitute a close circuit of the DTU, the other end of the close resistance R2 is connected with a close optical coupling input end in the photoelectric isolation module, for receiving a close signal of the DTU debugging circuit;

[0066] The positive of the power supply of the DTU input module is connected with the common end of the DTU debugging circuit;

[0067] The positive of the power supply in the DTU input module is connected with the common end in the DTU debugging circuit, since the DTU debugging circuit does not have a power supply, the power supply needs to be connected from the DTU input module to the common end of the DTU debugging circuit, so that when the passive empty node in the DTU debugging circuit acts, the split contact K1 and the close contact K2 representing the passive empty node can generate a signal corresponding to the action and transmit the signal to the corresponding split resistance R1 and close resistance R2, and then the photoelectric isolation module sends the signal to the CPU control unit, and the state reading of the DTU debugging circuit is completed.

[0068] In the embodiment, the permanent magnet input module comprises: a split diode D1, a close diode D2, a split diode D3 and a close diode D4, and a split resistance R4 and a close resistance R4.

[0069] The positive electrode of the split diode D1 is connected with a first output node of the permanent magnet mechanism controller, and the negative electrode is connected with a split resistance R3 and a split optical coupling; the positive electrode of the split diode D3 is connected with the other end of the split optical coupling, and the negative electrode is connected with a second output node of the permanent magnet mechanism controller;

[0070] At this time, assuming that the signals of the first output node and the second output node of the permanent magnet mechanism controller are positive and negative respectively, the positive signal enters the disconnecting resistor R3 and the disconnecting optical coupler via the positive electrode of the disconnecting diode D1 through the first output node, and then enters the second output node of the permanent magnet mechanism controller from the positive electrode of the disconnecting diode D3, thus forming a loop. In this state, the CPU control unit receives the disconnecting signal of the permanent magnet mechanism controller.

[0071] In addition, the positive electrode of the closing diode D2 is connected with the second output node of the permanent magnet mechanism controller, and the closing resistor R4 and the closing optical coupler are connected with the negative electrode of the closing diode D2; the positive electrode of the closing diode D4 is connected with the other end of the closing optical coupler, and the first output node of the permanent magnet mechanism controller is connected with the negative electrode of the closing diode D4.

[0072] At this time, assuming that the signals of the first output node and the second output node of the permanent magnet mechanism controller are negative and positive respectively, the positive signal enters the closing resistor R4 and the closing optical coupler via the positive electrode of the closing diode D2 through the second output node, and then enters the first output node of the permanent magnet mechanism controller from the positive electrode of the closing diode D4, thus forming a loop. In this state, the CPU control unit receives the closing signal of the permanent magnet mechanism controller.

[0073] Since the permanent magnet mechanism controller circulates the positive and negative signals and the negative and positive signals through the two output nodes, the positive and negative signals are repeatedly sent into the disconnecting resistor R3 and the closing resistor R4 through the positive electrodes of the diode D1 and the diode D2 which are connected with the two output nodes of the permanent magnet mechanism controller, and then form a loop through the diode D3 and the diode D4, so that the disconnecting resistor R3 and the closing resistor R4 can be effectively read in the positive and negative states, and then sent into the CPU control unit through the photoelectric isolation module.

[0074] In the embodiment, the input module includes the disconnecting resistor R5 and the closing resistor R6.

[0075] One end of the disconnecting resistor R5 is connected with the disconnecting contact K3 of the protection device without a monitoring loop, and the other end is connected with the input end of the disconnecting optical coupler in the photoelectric isolation module, for receiving the disconnecting signal of the protection device without a monitoring loop; one end of the closing resistor R6 is connected with the closing contact K4 of the protection device without a monitoring loop, and the other end is connected with the input end of the closing optical coupler in the photoelectric isolation module, for receiving the closing signal of the protection device without a monitoring loop.

[0076] The conventional tripping signal and closing signal of the protection device without monitoring loop are connected through the input module, the tripping signal and closing signal are sent by the corresponding tripping contact K3 and closing contact K4 in the protection device without monitoring loop, then the characteristics of the current flow range of the photoelectric isolation module are combined, for example, the current flow range of the photoelectric isolation module using the optical coupling is 10-20 mA, the corresponding resistance value is calculated, so that the input voltage signal can be between 24-220 V, thereby meeting the condition that the voltage of 24-220 V can be effectively sent into the CPU control unit through the photoelectric isolation module, so that the test range is more extensive and the applicability is better.

[0077] In the embodiment, the monitoring input module comprises a tripping resistor R7, a closing resistor R8 and a double-coil magnetic latching module.

[0078] One end of the tripping resistor R7 is connected with the tripping contact K5 of the protection device with monitoring loop, and the other end is connected with the tripping optical coupling input end of the photoelectric isolation module, for receiving the tripping signal of the protection device with monitoring loop;

[0079] One end of the closing resistor R8 is connected with the closing contact K6 of the protection device with monitoring loop, and the other end is connected with the closing optical coupling input end in the photoelectric isolation module, for receiving the closing signal of the protection device with monitoring loop;

[0080] Since the two output nodes of the protection device with monitoring loop in the controller need to be selectively conducted, the double-coil magnetic latching module is arranged, which is specifically a double-coil magnetic latching relay, the normally closed contact K7 and the split coil of which are connected in series between the tripping resistor R7 and the tripping contact K6, and the normally open contact K7 and the combination coil are connected in series between the closing resistor R8 and the closing contact K6, when the split coil is powered, the normally open contact K7 is controlled to be closed, at this time the normally closed contact K7 is disconnected, when the combination coil is powered, the normally closed contact K7 is controlled to be closed, and the normally open contact K7 is disconnected, so that the characteristics of the double-coil magnetic latching relay can realize the selective conduction of the two circuits where the tripping resistor R7 and the closing resistor R8 are located, so as to correspond to the action characteristics of the protection device with monitoring loop.

[0081] Further, the disconnecting contact K5 is connected in parallel with a voltage dividing resistor R9, and the closing contact K6 is connected in parallel with a voltage dividing resistor R10, one end of the voltage dividing resistors R9 and R10 is connected with the power supply in the protection device, at this time, the two loops corresponding to the disconnecting resistor R and the closing resistor R8 are always in the electrified state, thus forming the monitoring effect, as long as the corresponding disconnecting contact K5 or closing contact K6 is closed, the action of the double-coil magnetic latching relay can be immediately realized; in addition, the voltage dividing resistors can be used to divide the voltage at both ends of the split coil or the closing coil to be less than the action voltage of the double-coil magnetic latching module, that is, when the current flows through the voltage dividing resistor R9 and the voltage dividing resistor R10, the voltage entering the coil of the double-coil magnetic latching relay cannot reach its action voltage, and the contact K7 of the magnetic latching contactor cannot act, the two loops are divided by the voltage dividing resistors, so that the action voltage of the double-coil magnetic latching module cannot reach the requirement and cannot act;

[0082] Only when the corresponding disconnecting contact K5 or closing contact K6 is closed, the voltage dividing resistor is short-circuited, the voltage at both ends of the split coil or the closing coil reaches the action voltage, starts to act, realizes the selective closing of one of the two loops, and further sends the disconnecting signal or the closing signal to the CPU control unit.

[0083] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. An analog circuit breaker, characterized by The utility model relates to a relay protection test device, including: CPU control unit, the battery for providing power supply is connected with the CPU control unit; Input module, the input module is connected with the CPU control unit, and the input module includes: DTU input module for receiving the on-off signal of DTU debugging circuit; Permanent magnet input module for receiving the on-off signal of permanent magnet mechanism controller; Input module for receiving the on-off signal of protection device without monitoring circuit; Monitoring input module for receiving the on-off signal of protection device with monitoring circuit; Switch signal output module, which is connected with the CPU control unit, is used for corresponding output switch quantity signal according to the signal of the input module; AC current output module, which is connected with the CPU control unit, is used for outputting the signal of relay protection test.

2. The analog circuit breaker of claim 1, wherein, The DTU input module includes: One end of the on-off resistance R1 is connected with the on-off contact K1 of DTU debugging circuit, and the other end is connected with the on-off optical coupling input end, which is used for receiving the on-off signal of DTU debugging circuit; One end of the on-off resistance R2 is connected with the on-off contact K2 of DTU debugging circuit, and the other end is connected with the on-off optical coupling input end, which is used for receiving the on-off signal of DTU debugging circuit; The power supply positive of the DTU input module is connected with the common terminal of the DTU debugging circuit.

3. The analog circuit breaker of claim 1, wherein, The permanent magnet input module includes: The anode of the on-off diode D1 is connected with the first output node of permanent magnet mechanism controller, and the cathode is connected with the on-off resistance R3 and the on-off optical coupling; The anode of the on-off diode D2 is connected with the second output node of permanent magnet mechanism controller, and the cathode is connected with the on-off resistance R4 and the on-off optical coupling; The anode of the on-off diode D3 is connected with the other end of the on-off optical coupling, and the cathode is connected with the second output node of permanent magnet mechanism controller; The anode of the on-off diode D4 is connected with the other end of the on-off optical coupling, and the cathode is connected with the first output node of permanent magnet mechanism controller.

4. The analog circuit breaker of claim 1, wherein, The input module includes: One end of the on-off resistance R5 is connected with the on-off contact K3 of protection device without monitoring circuit, and the other end is connected with the on-off optical coupling input end, which is used for receiving the on-off signal of protection device without monitoring circuit; One end of the on-off resistance R6 is connected with the on-off contact K4 of protection device without monitoring circuit, and the other end is connected with the on-off optical coupling input end, which is used for receiving the on-off signal of protection device without monitoring circuit.

5. The analog circuit breaker of claim 1, wherein, The monitoring input module includes: One end of the on-off resistance R7 is connected with the on-off contact K5 of protection device with monitoring circuit, and the other end is connected with the on-off optical coupling input end, which is used for receiving the on-off signal of protection device with monitoring circuit; One end of the on-off resistance R8 is connected with the on-off contact K6 of protection device with monitoring circuit, and the other end is connected with the on-off optical coupling input end, which is used for receiving the on-off signal of protection device with monitoring circuit; The normally closed contact K7 and the split coil of the double coil magnetic retention module are connected between the on-off resistance R7 and the on-off contact K6, and the normally open contact K7 and the combination coil are connected between the on-off resistance R8 and the on-off contact K6.

6. The analog circuit breaker of claim 5, wherein, The contact K5 is connected with a voltage dividing resistor R9 in parallel, and the contact K6 is connected with a voltage dividing resistor R10 in parallel, for dividing the voltage of the two coils or the closing coil, so that the voltage is less than the action voltage of the double coil magnetic holding module.

7. The analog circuit breaker of claim 1, wherein, The battery is connected with a charge and discharge protection circuit.

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