CN209994158U - Power supply secondary circuit of high-voltage distribution room operation power supply device - Google Patents
Power supply secondary circuit of high-voltage distribution room operation power supply device Download PDFInfo
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- CN209994158U CN209994158U CN201822134505.3U CN201822134505U CN209994158U CN 209994158 U CN209994158 U CN 209994158U CN 201822134505 U CN201822134505 U CN 201822134505U CN 209994158 U CN209994158 U CN 209994158U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
The utility model relates to a high voltage distribution room operation power supply unit power supply secondary circuit, including single-circuit 35kV and following municipal administration high voltage power supply, 35kV and following municipal administration high voltage power supply inlet wire circuit breaker, voltage transformer, control transformer, fuse, ATS owner, stand-by power supply switching circuit, emergency power supply, operation power supply generating line section, operation power supply distribution circuit, 35kV and following high voltage inlet wire circuit breaker control secondary circuit, user's transformer, 380V low pressure diesel generator on-machine circuit breaker, 380V power generating line section, low voltage distribution box, user's consumer and 380V low pressure circuit breaker control secondary circuit; the dual-power automatic transfer switch adopts a dual-power automatic transfer switch as a main power supply transfer circuit and a standby power supply transfer circuit; the utility model discloses under the condition of circuit breaker separating brake, still can gain stand-by power supply, keep operating power supply to last the power supply.
Description
Technical Field
The utility model relates to an electrical engineering field, especially a high voltage electricity distribution room operating power supply unit power supply secondary circuit.
Background
The circuit breaker closing and tripping operation, microcomputer comprehensive protection and signal indication of a high-voltage distribution room all need a low-voltage power supply as power, and the power supply is called as an operating power supply. The operation power supply is mainly classified into an ac operation power supply and a dc operation power supply. The DC operation power supply supplies power by a storage battery during emergency, and an AC charging power supply is needed during normal operation. The ac operating power supply is powered directly from a single phase ac power supply. In the prior art, the charging power supply of the direct-current operating power supply or the power supply of the alternating-current operating power supply is taken from the municipal power supply, when only one path of municipal power supply has power failure, the power supply of the operating power supply also has power failure, the reliability is poor, and in order to improve the reliability, the alternating-current operating power supply is additionally provided with the UPS as an emergency power supply.
Because the high-voltage distribution room is poor in ventilation and heat dissipation, the storage battery of the additionally arranged UPS is quick in aging (or the storage battery of the direct-current operation power supply is quick in aging), the storage battery in the UPS or the direct-current operation power supply is easy to damage or has the phenomenon of capacity reduction in the actual use process, and the UPS or the direct-current operation power supply cannot be timely perceived when a fault occurs, so that the reliability cannot be greatly improved; therefore, the failure to provide reliable power supply for the protection device and the operating mechanism of the circuit breaker can cause the failure of the protection device or the failure of the circuit breaker, and the actual typical fault indicates that the UPS uninterruptible power supply or the dc operating power supply configured in the high-voltage distribution room of 35kV and below also has the problem of insufficient reliability.
When a storage battery in the UPS or the DC operating power supply is damaged (with high probability) and one path of the municipal power supply supplying power is powered off, the power supply paths of the operating power supply are powered off. At the moment, the municipal high-voltage power supply incoming line circuit breaker of 35kV or below can not be switched off due to loss of the operating power supply, and the circuit breaker still keeps a switching-on state. Because the interlocking relation of circuit breaker and 35kV and following municipal administration high voltage power supply inlet wire circuit breaker on the 380V low pressure diesel generator machine, lead to the unable combined floodgate of circuit breaker on the 380V low pressure diesel generator machine, after the manual start 380V low pressure diesel generator, because the unable combined floodgate of circuit breaker on the 380V low pressure diesel generator machine leads to the emergent generating line section of 380V not to have electricity, the electricity that 380V low pressure diesel generator sent can't be delivered to with the electric load end. At this time, the 380V low-voltage diesel generator does not function as a backup power supply. Meanwhile, an alternating current power supply obtained at a potential transformer PT and an alternating current power supply obtained at a low-voltage distribution box are respectively used as a main input power supply and a standby input power supply of two circuits of an operation power supply, the main input power supply and the standby input power supply of the two circuits are automatically switched by a main power supply switching circuit and a standby power supply switching circuit of an intermediate relay, the switching time is long, the switching action is unreliable, and the misoperation probability is high.
Disclosure of Invention
In view of this, the utility model aims at providing a high voltage distribution room operating power supply device power supply secondary circuit can make operating power supply's power supply not receive the interlocking relation influence of circuit breaker and 35kV and following municipal high voltage power supply inlet wire circuit breaker on the 380V low pressure diesel generator machine to guarantee operating power supply's reliability and continuity.
The utility model discloses a following scheme realizes: a high-voltage distribution room operation power supply secondary circuit with only one-way 35kV and below municipal high-voltage power supply comprises a single-way 35kV and below municipal high-voltage power supply A1, a 35kV and below municipal high-voltage power supply incoming line breaker A2, a voltage transformer (PT) A3, a control transformer A4, a fuse C1, a dual-power automatic transfer switch main, a standby power supply switching circuit C2, an emergency power supply, an operation power supply bus section A7, an operation power supply distribution loop A8, a 35kV and below high-voltage incoming line breaker control secondary circuit A9, a user transformer A11, a 380V low-voltage diesel generator B1, a 380V low-voltage diesel generator on-board breaker B2, a 380V emergency power supply bus section B3, a low-voltage distribution box 387B 4, user electrical equipment B5 and a 380V low-voltage breaker control secondary circuit B6;
the dual-power automatic transfer switch main and standby power supply transfer circuit adopts a dual-power Automatic Transfer Switch (ATS) C2 for power supply transfer between the main and standby power supplies;
the single-circuit 35kV and following municipal administration high voltage power supply A1 is supplied with electric energy by a municipal administration high voltage distribution station and is connected with the input end of a municipal administration high voltage power supply incoming line breaker A2 of the 35kV and following municipal administration high voltage power supply incoming line breaker A2, the output end of the municipal administration high voltage power supply incoming line breaker A2 of the 35kV and following municipal administration high voltage power supply incoming line breaker A2 is respectively connected with the input end of the voltage transformer A3 and the input end of the user transformer A11, the output end of the voltage transformer A3 is connected with the input end of the control transformer A4, the output end of the control transformer A4 is connected with the input end of the double-power automatic change-over switch main and standby power supply switching circuit, the output end of the double-power automatic change-over switch main and standby power supply switching circuit is connected with one end of the emergency power supply, the other end, the output end of the operation power supply distribution loop A8 is connected with the input end of a high-voltage incoming line breaker control secondary circuit A9 of 35kV and below, the output end of a 380V low-voltage diesel generator B1 is respectively connected with the input end of a breaker B2 on the 380V low-voltage diesel generator and one end of a fuse C1, the output end of a breaker B2 on the 380V low-voltage diesel generator and the output end of a user transformer A11 are both connected with the input end of a 380V emergency power supply bus section B3, the output end of a 380V emergency power supply bus section B3 is connected with the input end of a low-voltage distribution box B4, and the output end of the low-voltage distribution box B4 is connected with the input end of user electric equipment B5; the input end of the switching circuit of the main power supply and the standby power supply of the dual-power automatic transfer switch is also connected with the other end of the fuse C1;
the 380V low-voltage circuit breaker control secondary circuit B6 is electrically connected with a circuit breaker B2 on the 380V low-voltage diesel generator, and the 35kV and below high-voltage incoming line circuit breaker control secondary circuit A9 is electrically connected with the 35kV and below municipal high-voltage power supply incoming line circuit breaker A2;
the 380V low-voltage diesel generator upper circuit breaker B2 and the municipal high-voltage power supply incoming line circuit breaker A2 below the 35kV are mechanically and electrically interlocked, namely the 35kV high-voltage incoming line circuit breaker control secondary circuit A9 below the 35kV is interlocked with the 380V low-voltage circuit breaker control secondary circuit B6;
further, the linkage specifically is that 35kV and below municipal high-voltage power supply incoming line breaker A2 and breaker B2 on the 380V low-voltage diesel generator machine cannot be switched on simultaneously, when 35kV and below municipal high-voltage power supply incoming line breaker A2 are switched on, breaker B2 on the 380V low-voltage diesel generator machine is disconnected and cannot be switched on, and simultaneously, when breaker B2 on the 380V low-voltage diesel generator machine is switched on, 35kV and below municipal high-voltage power supply incoming line breaker A2 is disconnected and cannot be switched on.
Further, the emergency power supply adopts a UPS (uninterrupted power supply) A6 or adopts a DC power supply C3.
Further, the dual power automatic transfer switch C2, performing power switching between the main power supply and the standby power supply specifically includes: duplicate supply automatic transfer switch C2 switch-on K1 end, disconnection K2 end, operating power supply by the power supply of single 35kV and following municipal administration high voltage power supply A1, work as UPS uninterrupted power supply A6 perhaps when direct current operating power supply C3 battery damages, manual or automatic start 380V low pressure diesel generator B1, duplicate supply automatic transfer switch C2 switch-on K2 end, disconnection K1 end, operating power supply are supplied power by diesel generator B1.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model discloses do not receive on the 380V low pressure diesel generator machine influence of circuit breaker B2 and 35kV and following municipal administration high voltage power supply inlet wire circuit breaker A2 interlocking relation, under the condition of circuit breaker B2 separating brake on the 380V low pressure diesel generator machine, still can gain stand-by power supply to keep the operating power supply to last the power supply for a long time, reduce the economic loss who has a power failure suddenly.
(2) The utility model discloses a PC level dual supply automatic transfer switch can be after the main power source outage automatic switch-over to stand-by power supply, and the main power source resumes the power supply back automatic recovery to the main power source power supply to cut off stand-by power supply. The switching time is short, and the action is safe and reliable.
(3) The utility model discloses add the fuse case, overload and short-circuit protection to the return circuit power cord to guarantee stand-by power supply safety, reduce economic loss and occurence of failure probability.
Drawings
Fig. 1 is the high voltage distribution room operating power supply secondary circuit schematic block diagram of the embodiment of the utility model, which only has a single-path 35kV and the following municipal high voltage power supply in the prior art.
Fig. 2 is the ac power supply secondary circuit schematic block diagram of the high voltage distribution room operating power supply having only one-way 35kV and the following municipal high voltage power supply in the prior art when the emergency power supply is the UPS uninterruptible power supply.
Fig. 3 is the utility model discloses among the prior art only the high voltage distribution room operating power supply of one way 35kV and following municipal administration high voltage power supply when emergency power supply is DC power supply's DC power supply secondary circuit functional block diagram.
Fig. 4 is the utility model discloses high-voltage distribution room operating power supply secondary circuit schematic block diagram that only has single circuit 35kV and following municipal high voltage power supply of embodiment.
Fig. 5 is the high voltage distribution room operating power supply of the embodiment of the present invention, which only has a single-path 35kV and the following municipal high voltage power supply, and the functional block diagram of the ac power supply secondary circuit when the emergency power supply is the UPS uninterruptible power supply.
Fig. 6 is the embodiment of the utility model provides a high voltage distribution room operating power supply who only has single 35kV and following municipal administration high voltage power supply when emergency power source when DC power supply's DC power supply secondary circuit functional block diagram.
Fig. 7 is an internal schematic block diagram of a UPS according to an embodiment of the present invention.
Fig. 8 is a block diagram of the internal working principle of the dc power supply according to the embodiment of the present invention.
Fig. 9 is a control circuit diagram of a 35KV and below high-voltage incoming line circuit breaker according to an embodiment of the present invention.
Fig. 10 is the circuit diagram of the circuit breaker interlock control circuit on the 35KV and following municipal administration high voltage power supply incoming line circuit breaker and 380V low voltage diesel generator of the embodiment of the present invention.
Detailed Description
The present invention will be further explained with reference to the drawings and the embodiments.
As shown in fig. 4, 5, and 6, the present embodiment provides a secondary circuit for supplying power to an operation power supply device in a high voltage distribution room, which includes a single municipal high voltage power supply a1 and a municipal high voltage power supply incoming line breaker a2 of 35kV and below, a voltage transformer A3, a control transformer a4, a fuse C1, a dual power automatic transfer switch main, a standby power supply switching circuit, an emergency power supply, an operation power supply bus section a7, an operation power supply distribution loop A8, a high voltage incoming line breaker control secondary circuit a9 of 35kV and below, a user transformer a11, a 380V low voltage diesel generator B1, a 380V low voltage diesel generator on-board breaker B2, a 380V power supply bus section B3, a low voltage distribution box B4, a user electrical equipment B5, and a 380V low voltage breaker control secondary circuit B6;
the dual-power automatic transfer switch main and standby power supply transfer circuit adopts a dual-power Automatic Transfer Switch (ATS) C2 for power supply transfer between the main and standby power supplies;
the single-circuit 35kV and following municipal administration high voltage power supply A1 is supplied with electric energy by a municipal administration high voltage distribution station and is connected with the input end of a municipal administration high voltage power supply incoming line breaker A2 of the 35kV and following municipal administration high voltage power supply incoming line breaker A2, the output end of the municipal administration high voltage power supply incoming line breaker A2 of the 35kV and following municipal administration high voltage power supply incoming line breaker A2 is respectively connected with the input end of the voltage transformer A3 and the input end of the user transformer A11, the output end of the voltage transformer A3 is connected with the input end of the control transformer A4, the output end of the control transformer A4 is connected with the input end of the double-power automatic change-over switch main and standby power supply switching circuit, the output end of the double-power automatic change-over switch main and standby power supply switching circuit is connected with one end of the emergency power supply, the other end, the output end of the operation power supply distribution loop A8 is connected with the input end of a high-voltage incoming line breaker control secondary circuit A9 of 35kV and below, the output end of a 380V low-voltage diesel generator B1 is respectively connected with the input end of a breaker B2 on the 380V low-voltage diesel generator and one end of a fuse C1, the output end of a breaker B2 on the 380V low-voltage diesel generator and the output end of a user transformer A11 are both connected with the input end of a 380V emergency power supply bus section B3, the output end of a 380V emergency power supply bus section B3 is connected with the input end of a low-voltage distribution box B4, and the output end of the low-voltage distribution box B4 is connected with the input end of user electric equipment B5; the input end of the switching circuit of the main power supply and the standby power supply of the dual-power automatic transfer switch is also connected with the other end of the fuse C1;
the 380V low-voltage circuit breaker control secondary circuit B6 is electrically connected with a circuit breaker B2 on the 380V low-voltage diesel generator, and the 35kV and below high-voltage incoming line circuit breaker control secondary circuit A9 is electrically connected with the 35kV and below municipal high-voltage power supply incoming line circuit breaker A2;
the 380V low-voltage diesel generator is provided with a circuit breaker B2 which is mechanically and electrically interlocked with a municipal high-voltage power supply incoming line circuit breaker A2 of 35kV and below, namely, a high-voltage incoming line circuit breaker control secondary circuit A9 of 35kV and below is interlocked with a 380V low-voltage circuit breaker control secondary circuit B6. A control circuit diagram of a high-voltage incoming line breaker of 35KV and below is shown in fig. 9.
In this embodiment, as shown in fig. 10, the interlocking specifically includes that the municipal high-voltage power incoming line breaker a2 of 35kV and below and the municipal high-voltage power incoming line breaker B2 of 380V low-voltage diesel generator cannot be switched on simultaneously, when the municipal high-voltage power incoming line breaker a2 of 35kV and below is switched on, the municipal high-voltage power incoming line breaker B2 of 380V low-voltage diesel generator is switched off and cannot be switched on, and when the municipal high-voltage power incoming line breaker B2 of 380V low-voltage diesel generator is switched on, the municipal high-voltage power incoming line breaker a2 of 35kV and below is switched off and cannot be switched on.
In this embodiment, the emergency power source is a UPS uninterruptible power supply a6 or a dc power supply C3.
In this embodiment, as shown in fig. 5 and 6, the power switching performed by the dual power automatic transfer switch C2 between the main power supply and the standby power supply specifically includes: duplicate supply automatic transfer switch C2 switch-on K1 end, disconnection K2 end, operating power supply by the power supply of single 35kV and following municipal administration high voltage power supply A1, work as UPS uninterrupted power supply A6 perhaps when direct current operating power supply C3 battery damages, manual or automatic start 380V low pressure diesel generator B1, duplicate supply automatic transfer switch C2 switch-on K2 end, disconnection K1 end, operating power supply are supplied power by diesel generator B1.
Further, in this embodiment, in the prior art, as shown in fig. 1, a secondary circuit of a power supply for an operating power supply of a high-voltage distribution room of a single-line 35kV and below municipal high-voltage power supply is connected to a high-voltage bus section of a line inlet cabinet of the high-voltage distribution room, the single-line 35kV and below municipal high-voltage power supply a1 is connected to a voltage transformer A3 after passing through a line inlet breaker a2 of the 35kV and below municipal high-voltage power supply, and a secondary voltage obtained by the voltage transformer A3 is converted by a control transformer a4 to obtain an ac input main power supply P1 of the operating power supply. The operation power supply adopts two paths of power supplies for power supply, wherein the main path of power supply is led from the P1, and the standby path of power supply is led from the low-voltage side P2 of the low-voltage distribution box B4. The power supply of the distribution box B4 comes from a low-voltage side bus section of a user transformer A11 and a 380V diesel generator on-board circuit breaker B2 outlet terminal; the power supply of the user transformer A11 comes from the outlet end of a high-voltage circuit breaker A2 of 35kV and below. The power supplies of the two loops P1 and P2 adopt an intermediate relay main power supply and standby power supply switching circuit A5 to automatically switch: when the power supply P1 is powered off and the power supply P2 is powered on, the circuit A5 disconnects the P1 wiring loop and is switched to the power supply P2; when the power supply P2 is powered off and the power supply P1 is powered on, the circuit A5 disconnects the P2 wiring loop and switches to the P1.
In the prior art, only one-way municipal power supply unit with the voltage of 35kV or below is provided, and in order to ensure the reliability of power utilization, a 380V low-voltage diesel generator B1 is generally arranged as a self-contained power supply. The power utilization equipment of the end user is powered by a single municipal power supply A1 (the power supply path is A1-A2-A11-B3-B4-B5, and the path is marked as G1) of 35kV or below at ordinary times, and when the municipal power supply A1 is powered off, the power utilization equipment of the end user is powered by a self-contained 380V low-voltage diesel generator B1 power supply (the power supply path is B1-B2-B3-B4-B5, and the path is marked as G2). The power supply path of the operating power supply through the P1 terminal is as follows: A1-A2-A3-A4-A5-A6-A7-A8-A9 (label the path as R1); the power supply path of the operating power supply through the P2 terminal is as follows: A1-A2-A11-B3-B4-A5-A6-A7-A8-A9 (this path is labeled R1), or it may be: B1-B2-B3-B4-A5-A6-A7-A8-A9 (the path is labeled R2).
In the prior art, in order to ensure that a 380V low-voltage diesel generator self-contained power supply B1 does not transmit power back to a municipal power grid to affect the safety of the power grid, a mechanical and electrical linkage (A9 linkage and B6 linkage) is kept between a breaker B2 on the 380V low-voltage diesel generator and a breaker A2 of a 35kV and following municipal high-voltage power supply incoming line: 35kV and following municipal administration high voltage power supply inlet wire circuit breaker A2 and 380V low pressure diesel generator on circuit breaker B2 can not close simultaneously, when 35kV and following municipal administration high voltage power supply inlet wire circuit breaker A2 closed, 380V low pressure diesel generator on circuit breaker B2 must break off and can not close, simultaneously, when 380V low pressure diesel generator on circuit breaker B2 closed, 35kV and following municipal administration high voltage power supply inlet wire circuit breaker A2 must break off and can not close.
Therefore, in the prior art, although the operating power supply has two loops of wiring, the actual operation has only one power supply, namely: the single-path 35kV and below municipal high-voltage power supply A1 for the house. When a1 has a power failure, the power supply paths supplied by a1 have power failure (namely, the power supply paths G1 and R1), at this time, the high-voltage incoming line breakers of the user electric devices B5 and 35kV and below control the secondary circuit A9 to have power failure, the municipal power supply a1 is lost, at this time, the municipal high-voltage incoming line breaker a2 of 35kV and below still keeps a closed state, so that the breaker B2 on the 380V low-voltage diesel generator cannot be closed, at this time, the power supply paths G2 and R2 are in an open state, and the power supply paths B5 and A9 completely lose the power supply, and in this case, because a2 loses the operating power supply, the manual or electric operation cannot be switched off, so that B2 cannot be switched on all the time, so that the power supply of the generator cannot be transmitted to B36. In order to further improve the reliability, as shown in fig. 2 and 3, in the prior art, a UPS uninterruptible power supply a6 or a dc operation power supply C3 is added to a circuit after passing through an intermediate relay main and standby power supply switching circuit a5, and when only one path of municipal power supply entering a house of 35kV or less fails and both main loop P1 and standby loop P2 of the operation power supply fail, an emergency power supply is provided as a short-time operation power supply by a UPS uninterruptible power supply a6 (when the operation is dc, power is supplied by a dc power supply C3).
However, because the high-voltage distribution room is poor in ventilation and heat dissipation, the aging of the additionally arranged UPS A6 is faster (or the aging of the DC operation power supply C3 is faster), and the storage battery in A6 or C3 is easy to damage in the actual use process, so that the reliability is still not greatly improved; in addition, because the patrol is not in place or the patrol period is too long, even some power users do not configure professional electricians and rarely patrol, and the fault of A6 or C3 cannot be timely detected, a reliable power supply cannot be provided for the protection device and the operating mechanism of the circuit breaker, the protection device or the circuit breaker can be refused, and the actual typical fault indicates that the UPS uninterrupted power supply or the DC operating power supply configured in the high-voltage distribution room of 35kV or below also has the problem of insufficient reliability.
When the batteries in a6 or C3 break and the single-fed municipal power supply a1 fails, the feed paths G1, G2, R1, R2 of the prior art operating power supply all fail. At the moment, the municipal high-voltage power supply incoming line breaker A2 of 35kV or below cannot be switched off due to loss of an operating power supply, the circuit breaker B2 on the 380V low-voltage diesel generator cannot be switched on due to the interlocking relation between the circuit breaker B2 on the 380V low-voltage diesel generator and the circuit breaker A2 of the municipal high-voltage power supply incoming line breaker A, after the 380V low-voltage diesel generator is started manually, the circuit breaker B2 on the 380V low-voltage diesel generator cannot be switched on, the 380V emergency bus section B3 cannot be electrified, and electricity generated by the 380V low-voltage diesel generator B1 cannot be sent to an electric load end (A9 and B5). At this time, the 380V low-voltage diesel generator B1 does not function as a backup power source.
Particularly, in order to ensure that the electricity generated by a 380V low-voltage diesel generator B1 can be sent to terminal electric equipment B5 when a single-path 35kV and below municipal high-voltage power supply A1 has power failure, when only one path of commercial power A1 has power failure, an operating power supply can ensure power supply, so that a 35kV and below municipal high-voltage power supply incoming line breaker A2 can be manually operated to open and close, and according to the interlocking relation of a 380V low-voltage diesel generator upper breaker B2 and a 35kV and below municipal high-voltage power supply incoming line breaker A2, after the 35kV and below municipal high-voltage power supply incoming line breaker A2 is opened, a 380V low-voltage diesel generator upper breaker B2 can be closed, so that the generated electricity can be sent to terminal electric equipment B5. Because the 380V low-voltage diesel generator B1 can be started manually or automatically, after the manual or automatic start, the incoming line end of the breaker B2 on the 380V low-voltage diesel generator is electrified, so the following scheme is proposed in the embodiment:
in the embodiment, the main power supply of the operating power supply is not changed from P1, and the standby power supply of the operating power supply is changed from a 380V low-voltage diesel generator circuit breaker B2 leading wire to a single-phase 220V power supply. When only one single-circuit municipal high-voltage power supply A1 with the voltage of 35kV or below has power failure, a 380V low-voltage diesel generator B1 can be started manually or automatically to supply power, a power supply electricity taking point is arranged at the inlet wire end of an on-machine circuit breaker B2, the influence of the linkage relation between the on-machine circuit breaker B2 of the 380V low-voltage diesel generator and the on-machine circuit breaker A2 of the municipal high-voltage power supply with the voltage of 35kV or below is avoided, a standby power supply can still be obtained under the condition that the on-machine circuit breaker B2 of the 380V low-voltage diesel generator is switched off.
In this embodiment, a fuse C1 is added to a power line leading from the inlet end of a circuit breaker B2 on a 380V low-voltage diesel generator, so as to perform short-circuit and overload protection on the power line. Because the front end of the breaker B2 on the 380V low-voltage diesel generator is used for taking electricity, the power supply line is not protected by the breaker B2 on the 380V low-voltage diesel generator, and the fuse C1 is additionally arranged on the power supply line for short-circuit and overload protection.
In the embodiment, the intermediate relay main power supply and standby power supply switching circuit A5 is changed into a PC (personal computer) dual-power automatic transfer switch, the ATS can be automatically switched to a standby power supply after the main power supply is powered off, and automatically restored to the main power supply after the main power supply is restored and the standby power supply is cut off. The switching time is short, and the action is safe and reliable.
As can be seen from fig. 5 and 6, after the above modification, only one power consumption unit powered by a municipal high-voltage power supply a1 with 35kV or below is provided, when a generator is additionally provided as a standby power supply at the same time, the high-voltage distribution room operating power supply is powered by dual power supplies, and the first heavy main power supply P1 is taken from the outlet end of the municipal high-voltage power supply incoming line breaker a2 with 35kV or below through a voltage transformer; the second standby power supply P2 is directly taken from the incoming line end of a circuit breaker B2 on a 380V low-voltage diesel generator, and a fuse C1 is additionally arranged for protection. The main power supply P1 and the backup power supply P2 are automatically switched by the PC-level ATS. The outlet end of the double-power automatic transfer switch C2 still remains to be provided with a UPS uninterrupted power supply A6 or a DC operation power supply C3. When the municipal power supply normally supplies power at ordinary times, the double-power-supply automatic change-over switch C2 is connected with the end K1 and disconnected with the end K2, and the operation power supply is supplied with power by the municipal power supply A1; when the municipal power supply A1 is powered off, when the storage battery of the UPS A6 or the DC operating power supply C3 is not damaged, the UPS A6 or the DC operating power supply C3 can provide operating power, and when the storage battery of the UPS A6 or the DC operating power supply C3 is damaged, the 380V low-voltage diesel generator B1 can be manually started to supply power; the dual-power automatic transfer switch C2 is connected with the end K2, the end K1 is disconnected, an operating power supply is powered by a diesel generator B1, at the moment, the disconnecting switch 35kV and the following municipal high-voltage power supply incoming line circuit breaker A2 can be operated manually, after the disconnecting switch A2 kV and the following municipal high-voltage power supply incoming line circuit breaker A2 is disconnected, the circuit breaker B2 on a 380V low-voltage diesel generator can be operated manually, a 380V power bus section B3 is electrified, and the power supply of the diesel generator B1 is sent to an end load B5.
Specifically, in the present embodiment, the backup power source P2 of the operating power source is instead connected to the single-phase 220V power source from the inlet terminal of the 380V low-voltage diesel generator on-board circuit breaker FDJ (B2). When only one path of mains supply has power failure, a 380V low-voltage diesel generator B1 can be manually or automatically started to supply power, a power supply electricity taking point is arranged at the incoming line end of an on-machine circuit breaker B2 and is not influenced by the linkage relation between a circuit breaker B2 on the 380V low-voltage diesel generator and a circuit breaker A2 of a municipal high-voltage power supply incoming line of 35kV or below, and a standby power supply P2 can be obtained under the condition that a circuit breaker B2 is switched off, so that the long-time continuous power supply of an operating power supply is kept, the on-line circuit breaker A2 of the municipal high-voltage power supply incoming line of 35kV or below can be manually operated, the circuit breaker B2 on the interlocked 380V low-voltage diesel generator is switched on, and the power supply of the 380V low. Thereby ensuring the power supply reliability and continuity of the operation power supply and the power supply reliability and continuity of the user electric equipment.
Preferably, in this embodiment, a fuse C1 is added to a power line leading from the front end of a circuit breaker B2 on a 380V low-voltage diesel generator to perform short-circuit and overload protection on the power line. The intermediate relay main and standby power switching circuit A5 adopts a PC-level ATS automatic switching switch main and standby power switching circuit C2 instead, the ATS switching circuit can be automatically switched to a standby power P2 after the power failure of a main power P1, after the power supply of the main power P1 is recovered, the power supply of P2 is cut off and the power supply of the main power P1 is automatically recovered, the switching control adopts a special controller for control, and the action is reliable. The power supply secondary circuit is suitable for a high-voltage chamber operation power supply with a voltage level of 35kV or below and only a single-path municipal high-voltage power supply. The power supply device is suitable for supplying power to an alternating current operation power supply of an alternating current operation circuit breaker and a direct current operation circuit breaker.
Specifically, as shown in fig. 7, fig. 7 is an internal schematic block diagram of the UPS of the present embodiment. As shown in fig. 8, fig. 8 is a block diagram illustrating an internal operation principle of the dc power supply of this embodiment.
Particularly, a control circuit of a circuit breaker B2 on a 380V low-voltage diesel generator is integrated in a control cabinet of the 380V low-voltage diesel generator, belongs to a matching component of the 380V low-voltage diesel generator, and belongs to the content of the prior art.
It is worth mentioning that the utility model protects a hardware structure, as for the control method does not require protection. The above is only a preferred embodiment of the present invention. However, the present invention is not limited to the above embodiments, and any equivalent changes and modifications made according to the present invention do not exceed the scope of the present invention, and all belong to the protection scope of the present invention.
Claims (4)
1. A high voltage electricity distribution room operation power supply unit supplies power secondary circuit which characterized in that: the system comprises a single-circuit 35kV and below municipal high-voltage power supply A1, a 35kV and below municipal high-voltage power supply incoming line breaker A2, a voltage transformer A3, a control transformer A4, a fuse C1, a dual-power automatic transfer switch main and standby power supply switching circuit, an emergency power supply, an operation power supply bus section A7, an operation power supply distribution circuit A8, a 35kV and below high-voltage incoming line breaker control secondary circuit A9, a user transformer A11, a 380V low-voltage diesel generator B1, a 380V low-voltage diesel generator upper breaker B2, a 380V emergency power supply bus section B3, a low-voltage distribution box B4, a user electric device B5 and a 380V low-voltage breaker control secondary circuit B6;
the dual-power automatic transfer switch adopts a dual-power automatic transfer switch C2 for switching power between the main power supply and the standby power supply;
the single-circuit 35kV and following municipal administration high voltage power supply A1 is supplied with electric energy by a municipal administration high voltage distribution station and is connected with the input end of a municipal administration high voltage power supply incoming line breaker A2 of the 35kV and following municipal administration high voltage power supply incoming line breaker A2, the output end of the municipal administration high voltage power supply incoming line breaker A2 of the 35kV and following municipal administration high voltage power supply incoming line breaker A2 is respectively connected with the input end of the voltage transformer A3 and the input end of the user transformer A11, the output end of the voltage transformer A3 is connected with the input end of the control transformer A4, the output end of the control transformer A4 is connected with the input end of the double-power automatic change-over switch main and standby power supply switching circuit, the output end of the double-power automatic change-over switch main and standby power supply switching circuit is connected with one end of the emergency power supply, the other end, the output end of the operation power supply distribution loop A8 is connected with the input end of a high-voltage incoming line breaker control secondary circuit A9 of 35kV and below, the output end of a 380V low-voltage diesel generator B1 is respectively connected with the input end of a breaker B2 on the 380V low-voltage diesel generator and one end of a fuse C1, the output end of a breaker B2 on the 380V low-voltage diesel generator and the output end of a user transformer A11 are both connected with the input end of a 380V emergency power supply bus section B3, the output end of a 380V emergency power supply bus section B3 is connected with the input end of a low-voltage distribution box B4, and the output end of the low-voltage distribution box B4 is connected with the input end of user electric equipment B5; the input end of the switching circuit of the main power supply and the standby power supply of the dual-power automatic transfer switch is also connected with the other end of the fuse C1;
the 380V low-voltage circuit breaker control secondary circuit B6 is electrically connected with a circuit breaker B2 on the 380V low-voltage diesel generator, and the 35kV and below high-voltage incoming line circuit breaker control secondary circuit A9 is electrically connected with the 35kV and below municipal high-voltage power supply incoming line circuit breaker A2;
the 380V low-voltage diesel generator is provided with a circuit breaker B2 which is mechanically and electrically interlocked with a municipal high-voltage power supply incoming line circuit breaker A2 of 35kV and below, namely, a high-voltage incoming line circuit breaker control secondary circuit A9 of 35kV and below is interlocked with a 380V low-voltage circuit breaker control secondary circuit B6.
2. A high voltage electricity distribution room operation power supply apparatus power supply secondary circuit according to claim 1, characterized in that: the emergency power supply adopts a UPS (uninterrupted power supply) A6 or a DC power supply C3.
3. A high voltage electricity distribution room operation power supply apparatus power supply secondary circuit according to claim 1, characterized in that: chain specifically does 35kV and following municipal administration high voltage power supply inlet wire circuit breaker A2 with circuit breaker B2 can not be closed a floodgate simultaneously on the 380V low pressure diesel generator machine, works as when 35kV and following municipal administration high voltage power supply inlet wire circuit breaker A2 are closed a floodgate, circuit breaker B2 disconnection is not can not be closed a floodgate on the 380V low pressure diesel generator machine, simultaneously, works as when circuit breaker B2 is closed a floodgate on the 380V low pressure diesel generator machine, 35kV and following municipal administration high voltage power supply inlet wire circuit breaker A2 disconnection are not can be closed a floodgate.
4. A high voltage electricity distribution room operation power supply apparatus power supply secondary circuit according to claim 2, characterized in that: the dual-power automatic transfer switch C2 is characterized in that the power supply switching between the main power supply and the standby power supply is as follows: double power automatic transfer switch C2 switch-on K1 end, disconnection K2 end, operating power supply by single 35kV and following municipal administration high voltage power supply A1 power supply, work as UPS uninterrupted power supply A6 perhaps when direct current power supply C3 battery damages, manual or automatic start 380V low pressure diesel generator B1, double power automatic transfer switch C2 switch-on K2 end, disconnection K1 end, operating power supply are supplied power by diesel generator B1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822134505.3U CN209994158U (en) | 2018-12-18 | 2018-12-18 | Power supply secondary circuit of high-voltage distribution room operation power supply device |
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| CN201822134505.3U CN209994158U (en) | 2018-12-18 | 2018-12-18 | Power supply secondary circuit of high-voltage distribution room operation power supply device |
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| CN209994158U true CN209994158U (en) | 2020-01-24 |
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