CN213936095U - A black-start grid-connected switch without voltage closing device - Google Patents
A black-start grid-connected switch without voltage closing device Download PDFInfo
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- CN213936095U CN213936095U CN202022698578.2U CN202022698578U CN213936095U CN 213936095 U CN213936095 U CN 213936095U CN 202022698578 U CN202022698578 U CN 202022698578U CN 213936095 U CN213936095 U CN 213936095U
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Abstract
本实用新型一种黑启动并网开关无压合闸装置，包括供电电源、合闸开关、继电器模块和合闸信号输出模块；该装置通过合闸开关控制继电器模块中继电器的工作状态，进而实现继电器在常开和常闭触点状态切换，常开触点与合闸信号输出模块相连，合闸信号输出模块再和同期装置的并网开关合闸输入信号通道相连，当继电器工作时，常开触点闭合，即同期装置的并网开关合闸输入信号导通，实现了并网开关的无压合闸功能，并网开关合闸后，合闸开关控制继电器失电，常开触点断开，常闭触点闭合，恢复同期装置至正常控制状态；该装置能够简化黑启动合闸操作流程，降低人工操作并网开关合闸的不便和安全隐患。
The utility model is a voltage-free closing device for a black-start grid-connected switch, comprising a power supply, a closing switch, a relay module and a closing signal output module; the device controls the working state of the relay in the relay module through the closing switch, thereby realizing the relay When the normally open and normally closed contact states are switched, the normally open contact is connected to the closing signal output module, and the closing signal output module is connected to the closing input signal channel of the grid-connected switch of the synchronization device. When the relay is working, the normally open The contact is closed, that is, the closing input signal of the grid-connected switch of the synchronizing device is turned on, realizing the voltage-free closing function of the grid-connected switch. After the grid-connected switch is closed, the closing switch control relay loses power, and the normally open contact is disconnected. The open and normally closed contacts are closed to restore the synchronization device to the normal control state; the device can simplify the black-start closing operation process and reduce the inconvenience and safety hazards of manual operation of the grid-connected switch closing.
Description
Technical Field
The utility model belongs to the technical field of the black start, concretely relates to black start non-pressure combined floodgate device of switch that is incorporated into power networks.
Background
The black start is an important link in the field of power systems, a series of equipment state adjustment different from conventional operation is involved in the starting process, each measure is crucial to starting, a black start power grid is in a standby state in normal operation, once a command is adjusted, a power station is enabled to be started in a black mode, the power system is bound to be a first lighter for recovering power supply of the power grid, and the first lighter ignites a first life line of the whole power grid. The black start can prevent the power grid from losing power to cause huge impact on the lives and properties of people in serious cases, and the power is taken as essential basic energy of the current society, so that the ordinary continuous and stable operation of the power grid is ensured, and the power supply is orderly recovered when the power grid is in the face of major accidents. The utility model discloses an electric power system is incorporated into power networks switch under normal condition, any people do not have the operation authority, only the device of synchronizing can look for switching on after the synchronizing point and see power off, the switch that is incorporated into power networks of some power plants does not set up the function of closing on the spot, just can accomplish the switching on by artifical short circuit combined floodgate access signal when carrying out black start, the easy point misplacement of the first one of the existing problem, cause the condition of direct current short circuit, the second is that direct current short circuit current is not less than alternating current short circuit current behind the short circuit, there is the hidden danger of injury staff, artifical short circuit signal when the third is black start, it is loaded down with trivial details to work, many people guardianship, efficiency is lower, and there is the risk of makeing mistakes.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model provides a black start non-pressure combined floodgate device of switch that is incorporated into the power networks can make the switch that is incorporated into the power networks possess the bilateral non-pressure combined floodgate function of unilateral non-pressure, simplifies black start combined floodgate operation flow, reduces the inconvenience and the potential safety hazard that manual operation switch that is incorporated into the power networks closed a floodgate.
The utility model discloses a realize through following technical scheme:
a black start grid-connected switch non-voltage switching-on device comprises a switching-on switch, a relay module and a switching-on signal output module, wherein the switching-on switch is connected with a control end of the relay module, the switching-on switch controls the relay of the relay module to be in a live state and a power-off state through switching on and off, a normally open contact of the relay module is connected with the switching-on signal output module, the switching-on signal output module is connected with a switching-on signal port of a grid-connected switch of a synchronous device, and the normally open contact of the relay module is introduced into the switching-on signal port of the grid-connected switch of the synchronous device by the switching-on signal output module;
the switch-on switch adopts two key rotation self-locking switches, the public end of the first key rotation self-locking switch is connected with the anode of the power supply, the normally open end of the first key rotation self-locking switch is connected with the public end of the second key rotation self-locking switch, and the normally open end of the second key rotation self-locking switch is connected with the control port of the relay module.
Preferably, when the normally-open ends of the first key rotation self-locking switch and the second key rotation self-locking switch are both closed, the positive electrode of the power supply is transmitted to the control port of the relay module to drive the relay of the relay module to act, when the normally-open end of either or both of the first key rotation self-locking switch and the second key rotation self-locking switch is disconnected, the relay of the relay module is in a power-off and non-acting state, and the normally-closed ends of the first key rotation self-locking switch and the second key rotation self-locking switch are in a suspended state.
Preferably, still include power supply, power supply provides control voltage for closing switch, provides operating power for relay module solenoid, and power supply is used for the whole device power supply.
Furthermore, the power supply is composed of three 1.5V rechargeable batteries and a battery box.
Preferably, the normally open ports of the first key rotation self-locking switch and the second key rotation self-locking switch are both in a switching-on position, and the normally closed port is in a withdrawing position.
Preferably, the relay module comprises a power port, a relay, a diode, a first resistor and a triode, one end of the relay coil is connected with one port of the power port, the anode of the diode and the anode of a power supply, the other end of the relay coil is connected with the cathode of the diode and the emitter of the triode, the collector of the triode is connected with the other port of the power port and the cathode of the power supply, a closing switch is connected with the base of the triode through the first resistor, the power port is used for connecting the anode and the cathode of the power supply into the device, the relay is used for controlling the normally open contact and the normally closed contact to be in an open state, the diode is used for maintaining the residual capacity of the coil after the relay is powered off, the triode is used for driving the relay to work in an electrified mode, and the first resistor is used for voltage division to enable the base of the triode to obtain bias voltage.
Furthermore, the relay adopts a unit relay with a normally open contact and a normally closed contact, the rated working voltage is 5V, the triode adopts a PNP type 9012 triode, the triode is in a cut-off state when no voltage signal is input into the base, and the triode is in a conducting state after bias voltage is input into the base.
Preferably, the switching-on signal output module selects a single-row output terminal with two ports, one pin of two bottom pins of the output terminal is connected with the common contact of the relay, the other pin of the two bottom pins of the output terminal is connected with the normally open contact, and two ports of two top screw fixing ports of the output terminal are respectively connected with two input ports of switching-on signals of the synchronous device grid-connected switch.
Compared with the prior art, the utility model discloses following profitable technological effect has:
further, the utility model discloses closing switch adopts two keys to rotate to establish ties from locking-type switch and constitutes, needs during the use double equal rotation just can carry out the non-pressure combined floodgate operation of switch that is incorporated into the power networks to the closing position, and double operation has reduced the mistake risk of closing a floodgate, can play mutual guardianship as the double combined floodgate of important switch that is incorporated into the power networks, and two people all rotate the key to closing position exit position after the combined floodgate is accomplished, have guaranteed that black start goes on smoothly. The adoption of few electronic components reduces the cost of the device, enriches the black start closing means, is convenient for on-site popularization and use, and is convenient for operators to apply.
Further, the utility model discloses power supply adopts chargeable No. 5 batteries to establish ties and constitutes 4.5V, and the field cycle of being convenient for uses, reduces use cost, and power supply provides the control voltage signal for closing a floodgate switch on the one hand, and on the other hand provides working power supply for the solenoid of relay, need not to set up control voltage alone.
Further, the utility model discloses the normally open contact that relay module adopted the relay links to each other with contemporary device combined floodgate passageway, and only when the relay action, normally open contact just closed, and when the device did not use, normally closed contact was closed, and contemporary device combined floodgate passageway does not have signal input, does not influence contemporary device normal operating.
Further, the utility model discloses can install on the terminal fixed guide of device in the same period, the switching-on signal output line links to each other with device combined floodgate passageway in the same period through closing, and the field erection is simple, quick with the wiring, and the device is out of work when normal operating, need not frequent wiring, only just operates the combined floodgate when black start, does not influence and the original control mode of switch-on.
Drawings
Fig. 1 is a schematic block diagram of the device of the present invention.
Fig. 2 is a schematic circuit diagram of the device of the present invention.
In the figure: a power supply 1; a closing switch 2; a relay module 3; and a closing signal output module 4.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
The utility model discloses can solve when black start-up by artifical short circuit combined floodgate access signal could accomplish the combined floodgate, problem and hidden danger.
The utility model relates to a black start non-pressure combined floodgate device of switch that is incorporated into power networks, as shown in figure 1, including combined floodgate switch 2, relay module 3 and combined floodgate signal output module 4, combined floodgate switch 2 links to each other with relay module 3 control end, combined floodgate switch 2 realizes controlling relay module 3 relay electrification and the state of losing power through switching on and breaking off, relay module 3 relay normally open contact links to each other with combined floodgate signal output module 4, and combined floodgate signal output module 4 links to each other with the switch combined floodgate signal port that is incorporated into power networks of contemporary device again, combined floodgate signal output module 4 introduces relay module 3 relay normally open contact to the switch combined floodgate signal port that is incorporated into power networks of contemporary device. The utility model discloses a switching-on switch control relay module relay's operating condition, and then realize that the relay switches with normally closed contact state at normally opening, normally open contact links to each other with closing signal output module, closing signal output module links to each other with the switch combined floodgate input signal passageway that is incorporated into the power networks of contemporary device again, when the relay during operation, normally open contact is closed, the switch combined floodgate input signal that is incorporated into the power networks of contemporary device switches on promptly, the non-pressure combined floodgate function of the switch that is incorporated into the power networks has been realized, after the switch combined floodgate of being incorporated into the power networks, closing switch control relay loses electricity, normally open contact disconnection, normally closed contact is closed, resume contemporary device to normal control state.
In this embodiment, still include power supply 1, power supply 1 provides control voltage for closing switch 2, provides working power supply for the 3 solenoid of relay module, and power supply 1 is used for supplying power for whole device.
In this embodiment, the power supply 1 is composed of three 1.5V rechargeable batteries and a battery box.
In the embodiment, the closing switch 2 adopts two key-rotating self-locking switches, the common end of the first key-rotating self-locking switch is connected with the anode of the power supply 1, the normally-open end is connected with the common end of the second key-rotating self-locking switch, the normally-open end of the second key-rotating self-locking switch is connected with the control port of the relay module 3, when the normally open ends of the first key-rotating self-locking switch and the second key-rotating self-locking switch are both closed, the positive pole of the power supply 1 can be transmitted to the control port of the relay module 3 to drive the relay of the relay module 3 to act, when either or both of the first key-rotation self-locking switch and the second key-rotation self-locking switch are normally open and disconnected, in the relay module 3, the relay is in a power-off and non-operation state, and the normally closed ends of the first key rotation self-locking switch and the second key rotation self-locking switch are in a suspended and non-wiring state.
In this embodiment, the first key rotation self-locking switch and the second key rotation self-locking switch are handed over to be kept by different special persons, and when the grid-connected switch is operated and no-voltage switching-on is performed, the switching-on can be performed only by two persons monitoring each other; the normally open ports of the first key rotation self-locking switch and the second key rotation self-locking switch are both in a switching-on position, and the normally closed port is in a withdrawing position.
In this embodiment, the relay module 3 includes a power port, a relay, a diode, a first resistor and a triode, one end of the relay coil is connected with one port of the power port, the anode of the diode is connected with the anode of the power supply 1, the other end of the relay coil is connected with the cathode of the diode and the emitter of the triode, the collector of the triode is connected with the other port of the power port and the cathode of the power supply 1, the closing switch 2 is connected with the base of the triode through the first resistor, the power port is used for connecting the anode and the cathode of the power supply 1 into the device, the relay is used for controlling the open and closed contacts to be opened and closed, the diode is used for maintaining the residual capacity follow current in the coil after the relay loses power, the triode is used for driving the relay to work with power or not, and the first resistor is used for dividing voltage, so that the base of the triode obtains bias voltage.
In this embodiment, the relay is a unit relay, that is, the relay has a normally open contact and a normally closed contact, the rated operating voltage is 5V, the triode is a PNP 9012 triode, the triode is in a cut-off state when no voltage signal is input to the base, and the triode is in a conduction state after a bias voltage is input to the base.
In this embodiment, the switching-on signal output module 4 selects a single-row output terminal with two ports, one of two bottom pins of the output terminal is connected to the common contact of the relay, the other pin is connected to the normally open contact, and two ports of two top screw fixing ports of the output terminal are respectively connected to two input ports of a switching-on signal of the synchronization device grid-connected switch.
As shown in fig. 2, a black start grid-connected switch non-voltage switching-on device comprises a power port D1, a relay U1, a diode Dio1, a first resistor R1, a triode Q1, a switching-on signal output terminal H1, a first key rotation self-locking switch S1, a second key rotation self-locking switch S2, the switch-on switch 2 comprises a first key rotation self-locking switch S1 and a second key rotation self-locking switch S2, the relay module 3 comprises a power port D1, a relay U1, a diode Dio1, a first resistor R1 and a triode Q1, the switch-on signal output module 4 is a switch-on signal output terminal H1, the positive pole of the power supply 1 is connected with the 1 st pin of the power port D1, the negative pole of the power supply 1 is connected with the 2 nd pin of the power port D1, the control port of the relay module 3 is the opposite side end connected with the first resistor R1 and the triode Q1, and the output ports of the relay module 3 are a public end and a normally open contact; one end of a coil of a relay U1 is connected with a 1 st pin of a power port D1, the other end of the coil is connected with an emitter of a triode Q1, a collector of the triode Q1 is connected with a 2 nd pin of a power port D1, an anode of a diode Dio1 is connected with an emitter of the triode Q1, a cathode of the diode Dio1 is connected with the 1 st pin of the power port D1, a common end of a first key rotation self-locking switch S1 is connected with a 1 st pin of the power port D1, a normally open end of the first key rotation self-locking switch S2 is connected with a common end of a second key rotation self-locking switch S2, and a normally open end of the second key rotation self-locking switch S2 is connected with a base of the triode Q1 through a first resistor R1; the 2 nd pin of the closing signal output terminal H1 is connected with the common end contact of the relay U1, and the 1 st pin of the closing signal output terminal H1 is connected with the normally open contact of the relay U1.
The invention relates to a non-voltage switching-on device of a black-start grid-connected switch, which comprises the following steps of:
1) checking and confirming that the unit to be started is in a shutdown state, sending out a line and the main transformer in a power-off state, and entering the step 2);
2) installing a non-voltage switching-on device of the black-start grid-connected switch on a guide rail of a switching-on signal channel of the grid-connected switch of the synchronous device, and entering the step 3);
3) respectively connecting two ports of a closing signal output module 4 to two standby channels of closing signals of a synchronization device grid-connected switch through leads, and entering the step 4);
4) measuring the secondary side voltage of the PT voltage transformers on two sides of the grid-connected switch by using a universal meter, confirming that the grid-connected switch is free of voltage on one side or two sides, and then performing device operation, and entering step 5);
5) a first worker operates a first key to rotate the self-locking switch to a switching-on position, a second worker operates a second key to rotate the self-locking switch to a switching-on state, and the step 6 is carried out;
6) the first worker and the second worker confirm that the grid-connected switch is in a closing state, the first worker operates the first key to rotate the self-locking switch to the withdrawing position, the second worker operates the second key to rotate the self-locking switch to the withdrawing state, the black start commander is informed that the closing of the grid-connected switch is finished, and the first key rotation self-locking switch and the second key rotation self-locking switch are in the withdrawing state.
The above, only the utility model discloses a preferred embodiment, it is not right the utility model discloses a do any restriction, all according to the utility model discloses any simple modification, change and the equivalent structure change of technical essence to doing above embodiment all still belong to the utility model discloses technical scheme's within the scope of protection.
Claims (8)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022698578.2U CN213936095U (en) | 2020-11-19 | 2020-11-19 | A black-start grid-connected switch without voltage closing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022698578.2U CN213936095U (en) | 2020-11-19 | 2020-11-19 | A black-start grid-connected switch without voltage closing device |
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| CN213936095U true CN213936095U (en) | 2021-08-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112259424A (en) * | 2020-11-19 | 2021-01-22 | 西安热工研究院有限公司 | Non-voltage switching-on device and method for black-start grid-connected switch |
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- 2020-11-19 CN CN202022698578.2U patent/CN213936095U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112259424A (en) * | 2020-11-19 | 2021-01-22 | 西安热工研究院有限公司 | Non-voltage switching-on device and method for black-start grid-connected switch |
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