CN110707753A - Synchronous device closing loop for three-second main connection - Google Patents
Synchronous device closing loop for three-second main connection Download PDFInfo
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- CN110707753A CN110707753A CN201910899019.7A CN201910899019A CN110707753A CN 110707753 A CN110707753 A CN 110707753A CN 201910899019 A CN201910899019 A CN 201910899019A CN 110707753 A CN110707753 A CN 110707753A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/40—Synchronising a generator for connection to a network or to another generator
Abstract
The invention particularly relates to a synchronous device closing loop for three-half main connection, wherein a change-over switch KK is additionally arranged on an automatic quasi-synchronous screen of a generator, the change-over switch KK is arranged in the automatic quasi-synchronous closing loop of the generator, when an operator performs synchronous grid-connection operation of a breaker, the change-over switch KK is arranged at a synchronous closing detection position, namely 1 node, 2 node and 3 node and 4 node on the change-over switch KK are closed, 5 node and 6 node on the change-over switch KK are opened, a synchronous latching relay TJJ normally operates to realize a latching detection function, when the operator performs closed-loop closing operation of the breaker, the change-over switch KK is arranged at a non-voltage detection closing position, the 1 node, 2 node and the 3 node and the 4 node on the change-over switch KK are opened, the 5 node and the 6 node on the change-over switch KK are closed, the change-over switch KK blocks system side induced voltage, the synchronous locking relay can not be locked by mistake due to the induced voltage, so that the closing and closing operation can not be carried out.
Description
Technical Field
The invention belongs to the technical field of synchronous grid connection of generators in power plants, and particularly relates to a synchronous device closing loop for three-half main wiring.
Background
Aiming at the asynchronous closing fault phenomenon in the automatic quasi-synchronous closing process of a generator of a power system, most of the problems are problems of synchronous devices, but the problems of control loops exist, people pay attention to the reliability of the synchronous devices, neglect to optimize a closing control loop, and do not take measures to prevent misoperation or incorrect closing from the aspect of the control loop.
The synchronous locking device is an indispensable security measure of the automatic quasi-synchronous device of the generator and is used for reliably avoiding non-synchronous parallel accidents of the generator. The common synchronous locking device is composed of a synchronous locking relay and a synchronous locking loop, but the common synchronous locking device cannot perform loop closing operation due to induced voltage for 3/2 main wiring.
Disclosure of Invention
In view of this, the present invention provides a synchronous device closing circuit for three-second main connection, which aims to solve the problem that a synchronous locking device of an automatic quasi-synchronous device of a generator cannot perform a closed-loop closing operation on a circuit breaker of 3/2 main connection due to the influence of an induced voltage.
The technical scheme adopted by the invention is as follows:
a synchronous device switching-on loop for three-second main wiring is characterized in that a change-over switch KK is additionally arranged on an automatic quasi-synchronous screen of a generator, the change-over switch KK is arranged in the automatic quasi-synchronous switching-on loop of the generator, the change-over switch KK comprises synchronous switching-on detection and non-voltage switching-on detection, normally closed 1 and 2 nodes and normally closed 3 and 4 nodes of the synchronous switching-on detection position are connected in series to the system voltage side of a synchronous latching relay TJJ, and normally open 5 and 6 nodes of the non-voltage switching-on detection position are connected in series to an outlet node of the synchronous latching relay TJJ; the method specifically comprises the following steps:
the change-over switch KK is in a synchronous closing detection position, nodes 1, 2, 3 and 4 on the change-over switch KK are closed, nodes 5 and 6 on the change-over switch KK are disconnected, an operator performs synchronous grid-connected operation on a breaker, and the synchronous latching relay TJJ normally operates to realize latching detection;
change over switch KK is in examining the non-voltage switching-on position, 1, 2 nodes and 3, 4 nodes disconnection on the change over switch KK, 5, 6 nodes on the change over switch KK are closed, and operating personnel carries out the circuit breaker and is incorporated into the power networks the operation in the same period, change over switch KK blocks the latching relay TJJ voltage side induced voltage in the same period, and latching relay TJJ in the same period can not be because of induced voltage mistake shutting.
Preferably, a special test terminal is additionally arranged on the synchronized latching relay TJJ, a secondary circuit terminal of a voltage transformer in the automatic quasi-synchronized screen of the generator is replaced by the test terminal, and an operator can block the induction voltage of the synchronized latching relay TJJ in the closing and switching-on process of the closed loop by disconnecting a test terminal connecting piece.
Preferably, the synchronous latching relay TJJ and the automatic quasi-synchronous device are connected in parallel in an ac voltage loop, specifically:
one way of an outgoing line of a wiring terminal J3:3 on the automatic quasi-synchronization device passes through a wiring terminal 1D of the disk cabinet: 29 is connected with the 2 node of the synchronous latching relay TJJ, the other path is connected with the 11 node of the AC point selecting relay DTK12, the 3 node of the AC point selecting relay DTK12 is connected with a main transformer high-voltage side PT terminal box, and one path of an outgoing line of a wiring terminal J3:1 on the automatic quasi-synchronous device passes through a wiring terminal 1D of a disk cabinet: 26 is connected with a 2 node of a change-over switch KK, the other path is connected with a 9 node of an alternating current point selection relay DTK12, a 1 node of the alternating current point selection relay DTK12 is connected with a 330kVI mother PT terminal box, and one path of leading-out wires of a connecting terminal J3:4 on the automatic plesiochronous device passes through a wiring terminal 1D of a disk cabinet: 30 is connected with the 4 nodes of the synchronous latching relay TJJ, the other path is connected with the 12 nodes of the AC point selecting relay DTK12, the 4 nodes of the AC point selecting relay DTK12 are connected with a main transformer high-voltage side PT terminal box, and one path of an outgoing line of a wiring terminal J3:2 on the automatic quasi-synchronous device passes through a wiring terminal 1D of a disk cabinet: 28 is connected to 4 nodes of change over switch KK, and another way is connected to 10 nodes of exchanging selection point relay DTK12, 2 nodes of exchanging selection point relay DTK12 are connected to 330kVI female PT terminal box.
Preferably, the two ends of the alternating current point selecting relay DTK12 are connected in parallel with an alternating current point selecting relay DTK22, and a third outgoing line of a wiring terminal J3:1 on the automatic quasi-synchronizing device passes through a wiring terminal 1D of a panel cabinet: 25 is connected to a 9 node of an alternating current point selection relay DTK22, a 1 node of the alternating current point selection relay DTK22 is connected to a 330kV Yuzhai 1 line PT terminal box, and a third outgoing line of a wiring terminal J3:2 on the automatic quasi-synchronizing device passes through a wiring terminal 1D of a disk cabinet: the node 27 is connected to the 10 node of an alternating current point selection relay DTK22, and the 2 node of the alternating current point selection relay DTK22 is connected to a 330kV residual 1 line PT terminal box.
Preferably, the synchronous latching relay TJJ and the automatic quasi-synchronous device are connected in series to one branch of the dc control loop, specifically: the automatic quasi-synchronization device comprises a connecting terminal J2:8 outgoing line connected to a 9-node of a direct-current point-selecting relay DTK11, a connecting terminal J2:9 outgoing line connected to the 9-node of the direct-current point-selecting relay DTK21, a connecting terminal J2:8 outgoing line, a connecting terminal J2:9 outgoing line and a connecting terminal J1:7 outgoing line which are connected in parallel, a non-pressure closing button JWYHA is connected between a connecting terminal J2:6 and a connecting terminal J2:7 of the automatic quasi-synchronization device in series, and a connecting terminal J3:6 outgoing line of the automatic quasi-synchronization device passes through a disc cabinet connecting terminal 1D: the 32 is connected to the 5 nodes of the synchronous latching relay TJJ, the 7-node outgoing line of the synchronous latching relay TJJ is connected to the closing outlet relay HJ, and the change-over switch KK is connected to the two ends of the synchronous latching relay TJJ in parallel.
Preferably, a remote/local transfer switch QK and a dc selecting relay DTK11 are connected in series on the other branch of the dc control loop in sequence, a local manual selecting switch TK is connected in parallel at two ends of the remote/local transfer switch QK, and a dc selecting relay DTK21 is connected in parallel at two ends of the dc selecting relay DTK 11.
Preferably, the automatic quasi-synchronization device is a MAS-3 type microcomputer automatic quasi-synchronization device.
Compared with the prior art:
1. the invention adds a change-over switch KK on an automatic quasi-synchronization screen of a generator, wherein the change-over switch KK comprises synchronous closing detection and non-voltage closing detection, normally closed 1 and 2 nodes and normally closed 3 and 4 nodes at the synchronous closing detection position are connected in series at the system voltage side of a synchronous latching relay TJJ, and normally open 5 and 6 nodes at the non-voltage closing detection position are connected in series with an outlet node of the synchronous latching relay TJJ; the operating personnel locate change over switch KK and examine the hold-on position in the same term when carrying out the circuit breaker and being incorporated into the power networks the operation in the same term, promptly 1, 2 nodes and 3, 4 nodes on change over switch KK are closed, 5, 6 nodes disconnection on change over switch KK, lock relay TJJ normal operating in the same term realize shutting inspection function, and the operating personnel locate change over switch KK and examine the non-voltage hold-on position when carrying out the circuit breaker and closing the combined floodgate operation, 1, 2 nodes and 3, 4 nodes disconnection on change over switch KK, 5, 6 nodes on change over switch KK are closed, and change over switch KK blocks system side induced voltage, and lock relay can not lead to failing to close the combined floodgate operation of closing the ring because of induced voltage mistake shutting in the same term.
2. The invention replaces the secondary circuit terminal of the voltage transformer in the generator synchronization screen with the test terminal, and adds a special test terminal to the synchronization latching relay, so that the maintainer can block the induction voltage of the synchronization latching relay by disconnecting the test terminal connecting piece during closing the loop.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a circuit diagram of a dc control loop of a synchronous device closing loop for a three-second main connection according to an embodiment of the present invention;
fig. 2 is a circuit diagram of an ac voltage circuit for a closing circuit of a synchronous device for three-second main connection according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, the invention discloses a synchronous device closing loop for three-second main connection, wherein a transfer switch KK2 is additionally arranged on an automatic quasi-synchronous screen of a generator, the transfer switch KK2 is arranged in the automatic quasi-synchronous closing loop of the generator, the transfer switch KK2 comprises synchronous closing detection and non-voltage closing detection, normally closed 1 and 2 nodes and normally closed 3 and 4 nodes at the synchronous closing detection position are connected in series to the system voltage side of a synchronous latching relay TJJ3, and normally open 5 and 6 nodes at the non-voltage closing detection position are connected in series to an outlet node of the synchronous latching relay TJJ 2; the method specifically comprises the following steps: the change-over switch KK3 is in a synchronous closing detection position, nodes 1, 2, 3 and 4 on the change-over switch KK3 are closed, nodes 5 and 6 on the change-over switch KK3 are disconnected, an operator performs synchronous grid connection operation on a breaker, and the synchronous latching relay TJJ2 normally operates to realize latching detection; change over switch KK3 is in examining the non-voltage switching-on position, 1, 2 nodes and 3, 4 node disconnection on the change over switch KK3, 5, 6 node closure on the change over switch KK3, operating personnel carry out the circuit breaker and operate the grid-connected simultaneously, change over switch KK3 blocks the induced voltage of the latching relay TJJ2 voltage side in the same period, and latching relay TJJ2 in the same period can not be because of the induced voltage mislocking in the same period.
The secondary circuit terminal of the voltage transformer in the automatic quasi-synchronization screen of the generator is replaced by a test terminal, a special test terminal is additionally arranged on the synchronization latching relay TJJ, and an operator can block the induction voltage of the synchronization latching relay TJJ in the closing and closing process of the loop by disconnecting the test terminal connecting piece.
As shown in fig. 1, the synchronous latching relay TJJ2 and the automatic quasi-synchronous device 1 are connected in series to one branch of the dc control loop, specifically: a terminal J2:8 outgoing line of the automatic quasi-synchronization device 1 is connected to a 9 node of a direct-current point-selecting relay DTK119, a terminal J2:9 outgoing line of the automatic quasi-synchronization device 1 is connected to the 9 node of the direct-current point-selecting relay DTK217, a terminal J2:8 outgoing line, a terminal J2:9 outgoing line and a terminal J1:7 outgoing line of the automatic quasi-synchronization device 1 are arranged in parallel, a non-pressure closing button JYHWA 5 is connected in series between a terminal J2:6 and a terminal J2:7 of the automatic quasi-synchronization device 1, and a terminal J3:6 outgoing line of the automatic quasi-synchronization device 1 passes through a panel cabinet terminal 1D: 32 is connected to 5 nodes of a synchronous latching relay TJJ2, a 7-node outgoing line of the synchronous latching relay TJJ2 is connected to a closing outlet relay 4, and the change-over switch KK3 is connected to two ends of the synchronous latching relay TJJ2 in parallel.
As a further preferred embodiment of the present invention, a remote/local selector switch QK11 and a dc selector relay DTK119 are connected in series to the other branch of the dc control circuit in this order, a local manual selector switch TK10 is connected in parallel to both ends of the remote/local selector switch QK11, and a dc selector relay DTK217 is connected in parallel to both ends of the dc selector relay DTK 119.
As shown in fig. 2, the synchronous latching relay TJJ2 and the automatic quasi-synchronous device 1 are connected in parallel in an ac voltage loop, specifically: one way of the outgoing line of the wiring terminal J3:3 on the automatic quasi-synchronization device 1 passes through a wiring terminal 1D of the disk cabinet: 29 is connected with the 2 node of the synchronous latching relay TJJ2, the other path is connected with the 11 node of the AC point selecting relay DTK128, the 3 node of the AC point selecting relay DTK128 is connected with the main transformer high-voltage side PT terminal box, one path of the leading-out wire of the connecting terminal J3:1 on the automatic quasi-synchronous device 1 passes through a wiring terminal 1D of a disk cabinet: 26 is connected with a 2 node of a change-over switch KK2, the other path is connected with a 9 node of an alternating current point selection relay DTK128, a 1 node of the alternating current point selection relay DTK128 is connected with a 330kVI female PT terminal box, and an outgoing line of a terminal J3:4 on the automatic plesiochronous device 1 passes through a wiring terminal 1D of a disk cabinet: 30 is connected with the 4 nodes of the synchronous latching relay TJJ2, the other path is connected with the 12 nodes of the AC point selecting relay DTK128, the 4 nodes of the AC point selecting relay DTK128 are connected with the main transformer high-voltage side PT terminal box, one path of the leading-out wire of the connecting terminal J3:2 on the automatic quasi-synchronous device 1 passes through a wiring terminal 1D of a disk cabinet: 28 is connected to 4 nodes of the change-over switch KK2, the other path is connected to 10 nodes of an alternating current point selection relay DTK128, and 2 nodes of the alternating current point selection relay DTK128 are connected to a 330kVI female PT terminal box.
As a further preferred aspect of the present invention, the ac selection relay DTK226 is connected in parallel to both ends of the ac selection relay DTK128, and the third outgoing line of the connection terminal J3:1 of the automatic quasi-synchronization apparatus 1 passes through the disk cabinet connection terminal 1D: 25 is connected to a 9 node of an alternating current point selection relay DTK226, a 1 node of the alternating current point selection relay DTK226 is connected to a 330kV Yuzhai 1 line PT terminal box, and a third path outgoing line of a wiring terminal J3:2 on the automatic quasi-synchronizing device 1 passes through a wiring terminal 1D of a disk cabinet: the node 27 is connected to the 10 node of an alternating current point selection relay DTK226, and the 2 node of the alternating current point selection relay DTK226 is connected to a 330kV residual village 1 line PT terminal box.
The automatic quasi-synchronization device 1 is selected from MAS-3 microcomputer automatic quasi-synchronization device.
The specific working process of the invention is as follows: the primary loop of the three-half main wiring has two synchronization points, which are 3311 and 3310 synchronization points, respectively.
The positive electricity of the direct current power supply is sent to 707/709 loops by operating a remote/local switch QK11 and a local manual point selection switch TK10, and after a direct current point selection relay DTK11(21) and a direct current point selection relay DTK12(22) are excited, a 3311 synchronous point/3310 synchronous point completes point selection operation.
After the point selection operation, take the 3311 synchronization point as an example:
after the direct current point selection relay DTK119 is excited, a normally open contact of the direct current point selection relay DTK119 sends a 3311 synchronous point selection signal to the automatic quasi-synchronous device 1, and the automatic quasi-synchronous device 1 starts to execute 3311 synchronous closing commands of the synchronous points after receiving the signal.
After the alternating current point selection relay DTK128 is excited, the normally open contacts of the alternating current point selection relay DTK128 transmit alternating current on two sides of the 3311 synchronization point to the automatic quasi-synchronization device 1 so that the automatic quasi-synchronization device 1 can judge synchronization conditions; when the alternating-current voltages on two sides of the 3311 synchronization point meet synchronization parallel connection conditions, the automatic quasi-synchronization device 1 sends a closing instruction to excite the closing outlet relay HJ4, a normally open contact of the closing outlet relay HJ4 is connected into a closing loop of the breaker, and the breaker completes synchronization closing after closing.
When the three-second main connecting wire is used for overhauling the unit, the closing operation is completed, the voltage on the side to be merged at the same time point on a primary loop of the three-second main connecting wire is zero, and the non-voltage closing detection button JWYHA5 is pressed, so that the closing operation can be completed.
After a synchronous loop is connected to a synchronous latching relay TJJ2, when a unit is overhauled, a system side voltage is sensed to a side to be merged by the synchronous latching relay TJJ2, so that the automatic quasi-synchronous device 1 cannot carry out loop closing operation because the voltage at the side to be merged is not zero when a loop is closed, and aiming at the conditions, after a synchronous detection/non-voltage detection change-over switch KK3 is additionally arranged on an automatic quasi-synchronous screen of a generator, the induced voltage is isolated by the change-over switch KK3 when the voltage is detected, so that the normal operation is not influenced; the synchronous latching relay TJJ2 can be normally put into use during the synchronous detection period, and the reliability of the system is improved.
Through the transformation to locking device in the same period, the change over switch KK3 that the operation personnel can be convenient operates, adapts to the various operating modes of the automatic accurate device in the same period of generator, can no longer take place closing the ring combined floodgate in-process, because of the influence of induced voltage causes locking relay malfunction in the same period and locks automatic accurate device in the same period, leads to unable operation.
Secondly, the secondary circuit terminal of the voltage transformer in the automatic quasi-synchronization screen of the generator is replaced by a test terminal, a special test terminal is additionally arranged on the synchronization latching relay TJJ, and an operator can block the induction voltage of the synchronization latching relay TJJ in the closing process of the closed loop by disconnecting the test terminal connecting piece.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A synchronous device switching-on loop for three-second main wiring is characterized in that a change-over switch KK is additionally arranged on an automatic quasi-synchronous screen of a generator, the change-over switch KK is arranged in the automatic quasi-synchronous switching-on loop of the generator, the change-over switch KK comprises synchronous switching-on detection and non-voltage switching-on detection, normally closed 1 and 2 nodes and normally closed 3 and 4 nodes of the synchronous switching-on detection position are connected in series to a system voltage side of a synchronous latching relay TJJ, and normally open 5 and 6 nodes of the non-voltage switching-on detection position are connected in series to an outlet node of the synchronous latching relay TJJ; the method specifically comprises the following steps:
the change-over switch KK is in a synchronous closing detection position, nodes 1, 2, 3 and 4 on the change-over switch KK are closed, nodes 5 and 6 on the change-over switch KK are disconnected, an operator performs synchronous grid-connected operation on a breaker, and the synchronous latching relay TJJ normally operates to realize latching detection;
change over switch KK is in examining the non-voltage switching-on position, 1, 2 nodes and 3, 4 nodes disconnection on the change over switch KK, 5, 6 nodes on the change over switch KK are closed, and operating personnel carries out the circuit breaker and is incorporated into the power networks the operation in the same period, change over switch KK blocks the latching relay TJJ voltage side induced voltage in the same period, and latching relay TJJ in the same period can not be because of induced voltage mistake shutting.
2. The synchronous device switching-on circuit for three-half main connection according to claim 1, wherein a special test terminal is added on the synchronous latching relay TJJ, and a secondary circuit terminal of a voltage transformer in an automatic quasi-synchronous generator screen is replaced by the test terminal, so that an operator can block the induced voltage of the synchronous latching relay TJJ in the closing and switching-on process by disconnecting a test terminal connecting piece.
3. The circuit for closing a contemporaneous device for a three-half main connection according to claim 1, characterized in that said contemporaneous blocking relay TJJ and the automatic quasi-contemporaneous device are connected in parallel in the alternating voltage circuit, in particular:
one way of an outgoing line of a wiring terminal J3:3 on the automatic quasi-synchronization device passes through a wiring terminal 1D of the disk cabinet: 29 is connected with the 2 node of the synchronous latching relay TJJ, the other path is connected with the 11 node of the AC point selecting relay DTK12, the 3 node of the AC point selecting relay DTK12 is connected with a main transformer high-voltage side PT terminal box, and one path of an outgoing line of a wiring terminal J3:1 on the automatic quasi-synchronous device passes through a wiring terminal 1D of a disk cabinet: 26 is connected with a 2 node of a change-over switch KK, the other path is connected with a 9 node of an alternating current point selection relay DTK12, a 1 node of the alternating current point selection relay DTK12 is connected with a 330kVI mother PT terminal box, and one path of leading-out wires of a connecting terminal J3:4 on the automatic plesiochronous device passes through a wiring terminal 1D of a disk cabinet: 30 is connected with the 4 nodes of the synchronous latching relay TJJ, the other path is connected with the 12 nodes of the AC point selecting relay DTK12, the 4 nodes of the AC point selecting relay DTK12 are connected with a main transformer high-voltage side PT terminal box, and one path of an outgoing line of a wiring terminal J3:2 on the automatic quasi-synchronous device passes through a wiring terminal 1D of a disk cabinet: 28 is connected to 4 nodes of change over switch KK, and another way is connected to 10 nodes of exchanging selection point relay DTK12, 2 nodes of exchanging selection point relay DTK12 are connected to 330kVI female PT terminal box.
4. The closing circuit of the synchronous device for three-half main connection as claimed in claim 3, wherein the ac selection point relay DTK22 is connected in parallel with two ends of the ac selection point relay DTK12, and the third outgoing line of the connection terminal J3:1 of the automatic quasi-synchronous device passes through the connection terminal 1D of the panel cabinet: 25 is connected to a 9 node of an alternating current point selection relay DTK22, a 1 node of the alternating current point selection relay DTK22 is connected to a 330kV Yuzhai 1 line PT terminal box, and a third outgoing line of a wiring terminal J3:2 on the automatic quasi-synchronizing device passes through a wiring terminal 1D of a disk cabinet: the node 27 is connected to the 10 node of an alternating current point selection relay DTK22, and the 2 node of the alternating current point selection relay DTK22 is connected to a 330kV residual 1 line PT terminal box.
5. The synchronous device closing circuit for three-half main connection according to claim 1, wherein the synchronous latching relay TJJ and the automatic quasi-synchronous device are connected in series to one branch of the dc control circuit, specifically: the automatic quasi-synchronization device comprises a connecting terminal J2:8 outgoing line connected to a 9-node of a direct-current point-selecting relay DTK11, a connecting terminal J2:9 outgoing line connected to the 9-node of the direct-current point-selecting relay DTK21, a connecting terminal J2:8 outgoing line, a connecting terminal J2:9 outgoing line and a connecting terminal J1:7 outgoing line which are connected in parallel, a non-pressure closing button JWYHA is connected between a connecting terminal J2:6 and a connecting terminal J2:7 of the automatic quasi-synchronization device in series, and a connecting terminal J3:6 outgoing line of the automatic quasi-synchronization device passes through a disc cabinet connecting terminal 1D: the 32 is connected to the 5 nodes of the synchronous latching relay TJJ, the 7-node outgoing line of the synchronous latching relay TJJ is connected to the closing outlet relay HJ, and the change-over switch KK is connected to the two ends of the synchronous latching relay TJJ in parallel.
6. The synchronous device closing circuit for three-half main wiring according to claim 5, wherein a remote/local switch QK and a DC Point selection Relay DTK11 are connected in series on the other branch of the DC control circuit in sequence, a local manual Point selection switch TK is connected in parallel at two ends of the remote/local switch QK, and a DC Point selection Relay DTK21 is connected in parallel at two ends of the DC Point selection Relay DTK 11.
7. The synchronous device closing circuit for a three-half main line as claimed in claim 1, wherein the automatic quasi-synchronous device is selected from a MAS-3 type microcomputer automatic quasi-synchronous device.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111654063A (en) * | 2020-05-28 | 2020-09-11 | 深圳供电局有限公司 | Automatic self-synchronizing system of small hydropower station hydraulic generator |
| CN111934353A (en) * | 2020-07-03 | 2020-11-13 | 华电电力科学研究院有限公司 | Method for obtaining false synchronization grid-connected signals of unit and optimizing synchronization grid-connected signals based on different wiring modes |
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| CN111934353B (en) * | 2020-07-03 | 2022-07-05 | 华电电力科学研究院有限公司 | Method for obtaining false synchronization grid-connected signals of unit and optimizing synchronization grid-connected signals |
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