CN211377605U - Uninterrupted parallel operation grid-connected system of medium-voltage power supply vehicle - Google Patents
Uninterrupted parallel operation grid-connected system of medium-voltage power supply vehicle Download PDFInfo
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- CN211377605U CN211377605U CN201922427069.3U CN201922427069U CN211377605U CN 211377605 U CN211377605 U CN 211377605U CN 201922427069 U CN201922427069 U CN 201922427069U CN 211377605 U CN211377605 U CN 211377605U
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Abstract
The utility model discloses a non-power-off parallel operation grid-connected system of a medium-voltage power supply vehicle, which comprises a column switch and a power supply vehicle, wherein a generator set, a commercial power input end and a load output end are arranged in the power supply vehicle, a commercial power input circuit breaker and a load output circuit breaker are arranged in the power supply vehicle, and the generator set is connected in parallel to the input end of the load output circuit breaker through an oil engine input circuit breaker; the commercial power input end is connected with the incoming side of the column switch through the input load switch, and the load output end is connected with the power transmission side of the column switch through the output load switch. The utility model adopts IM-NT, IG-NT and IG-AVRI module control systems; the method can ensure that the voltage and the frequency of the generator are controlled to be consistent with those of the commercial power grid, ensures grid connection reliability and multiple safety protections, and can meet the base number of sudden-change loads by setting according to the load value.
Description
Technical Field
The utility model relates to an emergency power source car field especially relates to a no power failure parallel operation grid-connected system of middling pressure power source car.
Background
In recent years, with the continuous upgrading of power systems, 10kv distribution lines and equipment become important components of power grids in China, but due to the influence of environmental factors and emergencies, a sudden power failure phenomenon often occurs in a large area, and a fault emergency repair cannot be rapidly carried out in a short time, so that power supply cannot be carried out for a long time, and economic losses are disastrous. At present, a power supply vehicle is popularized and applied in emergency power protection, but in the uninterrupted operation of a large-area 10kv distribution network, the load base number of the power supply vehicle cannot be correctly set due to uncertain factors of the load size, and when the setting is too high, the phenomenon of converging to a main power network occurs; if the setting is too low, insufficient starting is caused, grid connection breakage failure is caused, and normal starting and power conservation cannot be realized; and in the operation process, no standard reliable live working grid-connected operation flow without power outage exists, so that operation failure is easily caused, and the phenomenon of commercial power backflow occurs to cause accidents.
Disclosure of Invention
The utility model aims at providing a practical effectual testing arrangement that is incorporated into power networks, control generator voltage, frequency and city electric wire netting unanimous, guarantee the reliability of being incorporated into power networks.
The utility model provides a technical problem can adopt following technical scheme to realize:
a non-power-outage parallel-operation grid-connected system of a medium-voltage power supply vehicle comprises a column switch and the power supply vehicle, wherein a generator set, a mains supply input end and a load output end are arranged in the power supply vehicle, the mains supply input end is connected with the load output end through a cable, a mains supply input circuit breaker and a load output circuit breaker are sequentially arranged in the power supply vehicle, and the generator set in the power supply vehicle is connected to the input end of the load output circuit breaker in parallel through an oil engine input circuit breaker;
the power supply input end is connected with an input load switch through a power supply input cable, the input load switch is connected with the incoming side of the on-column switch through an input drainage cable, the load output end is connected with an output load switch through a load output cable, and the output load switch is connected with the power transmission side of the on-column switch through an output drainage cable.
Preferably, the commercial power input end is provided with a copper bar socket or a quick connector.
Preferably, when the mains supply input cable is in butt joint with the input load switch and the input drainage cable is in butt joint with the input load switch, the phase sequence of the a/B/C3 phases of the mains supply input cable and the input drainage cable is consistent with the phase sequence of the input load switch identifier; when the load output cable is in butt joint with the output load switch and the output drainage cable is in butt joint with the output load switch, the phase sequence of the A/B/C3 phases of the load output cable and the output drainage cable is consistent with the phase sequence of the output load switch identification.
Preferably, the system further comprises a control system, wherein the control system mainly comprises an IM-NT controller, an IG-NT grid-connected controller and an IG-AVRI module, the IM-NT controller module is connected with the mains supply input end, collects relevant data of a mains supply end and controls the mains supply input circuit breaker, the IG-AVRI module is connected with the engine set and the IG-NT grid-connected controller, collects data of an output power end of the engine and transmits the data to the corresponding IG-NT grid-connected controller of the generator set, and the IG-NT grid-connected controller controls the input circuit breaker of the oil engine and transmits corresponding communication data information.
The utility model adopts IM-NT, IG-NT and IG-AVRI module control systems; the method can ensure that the voltage and frequency of the generator are controlled to be consistent with those of the commercial power grid, ensures grid connection reliability and multiple safety protection, and can meet the sudden change load base number by setting according to the load value. Meanwhile, an operation method of reliable source vehicle uninterrupted grid connection is perfected, the problem of commercial power backflow is avoided, accidents are reduced, and the operation failure rate is reduced.
Drawings
Fig. 1 is a schematic diagram of the circuit connection of the present invention.
Fig. 2 is the utility model discloses the not power failure control system circuit diagram that is incorporated into the power networks.
In the figure, a column 1 switch, a power supply vehicle 2, a power generating set 3, a commercial power input terminal 4, a load output terminal 5, an input load switch 6, an output load switch 7, an oil engine input breaker 31, a commercial power input breaker 41, a load output breaker 51, an input drainage cable 61, a commercial power input cable 62, an output drainage cable 71 and a load output cable 72.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
The utility model discloses a merge into the 10KV electric wire netting with the supply vehicle and form bypass system and supply power to the load. The power grid is supported and installed on the ground through telegraph poles (tension rods and straight rods). Fig. 1 and 2 are the preferred scheme of the utility model, including column switch 1 and supply vehicle 2, column switch 1 is the safety switch who ensures the power consumption safety on the overhead line, is equipped with generating set 3 in the supply vehicle 2, mains input 4 and load output 5, and mains input 4 passes through the cable with load output 5 and links to each other to be equipped with mains input circuit breaker 41 and load output circuit breaker 51 in proper order, generating set 3 in the supply vehicle passes through oil engine input circuit breaker 31 and connects in parallel to load output circuit breaker 51's input.
An input load switch 6 is arranged on an input end bypass of the power supply vehicle and connected to the left side (namely the power supply side) of the pole-mounted switch 1, and an output load switch 7 is arranged on an output end bypass and connected to the right side (namely the power supply side) of the pole-mounted switch 1. The input load switch 6 is connected with the column switch 1 through an input drainage cable 61 and is connected with the commercial power input end 4 through a commercial power input cable 62; the output load switch 7 is connected with the column switch 1 through an output drainage cable 71 and is connected with the load output end 5 through a load output cable 72.
Two sides of the closed column switch 1 are respectively connected with a down-leading cable, an input drainage cable 61 is arranged on the left side, and an output drainage cable 71 is arranged on the right side; the input drainage cable 61 is connected with the input load switch 6 at the opposite end, the output drainage cable 71 is connected with the output load switch 7 at the opposite end, the input load switch 6 and the output load switch 7 are both in a brake-off state, when the input drainage cable 3 is connected, the A/B/C phase sequence must be consistent with the identification phase sequence of the input load switch 6 and the output load switch 7, the input load switch 6 serves as a commercial power input source, and the butt commercial power input cable 62 can be connected to the commercial power input end 4 of the power supply vehicle. The commercial power input end 4 adopts two connection modes of a copper bar or a quick plug, is provided with a copper bar socket or a quick plug (not shown in the figure), and has the characteristic of universal usability.
After the external cables are accurately laid, the oil engine input circuit breaker 31, the load output circuit breaker 51 and the commercial power input circuit breaker 41 in the power supply vehicle are operated to be in an opening state, and then the next operation is carried out. Firstly, a bypass input load switch 6 and a bypass output load switch 7 are switched on, then a mains supply input circuit breaker 41 and a load output circuit breaker 51 are switched on, the output load switch 7 is connected with a load output cable 72 to a load output end 5 of a power supply vehicle, and at the moment, a bypass power grid system of a passage is formed by the power supply vehicle system without power failure.
When the power supply system of the power supply vehicle is started to supply power, the pole-mounted switch 1 is firstly disconnected, the pole-mounted switch 1 is confirmed to be in the open state (the inside of the power supply vehicle system can also prompt the load work of a bypass power grid), the generator set 3 is started, the oil closing machine input breaker 31 realizes the forward grid connection, and if the pole-mounted switch 1 is still in the close state before the oil closing machine input breaker 31, the current backflow problem of a main power grid can be caused, and the power grid is influenced. After forward grid connection, the brake-off commercial power is firstly input into the circuit breaker 41 to disconnect the bypass power grid system, then the brake-off commercial power is input into the input load switch 6 of the bypass, the power supply side of the overhead line is powered off, the main output is provided by the power supply vehicle generator set 3 to supply power to the final load, and the power supply end is ensured to be powered off. After the line processing is finished, the power supply of the overhead line is recovered, reverse grid connection is carried out at the moment, the bypass input load switch 6 is switched on first, then the commercial power input circuit breaker 41 is switched on, finally the column switch 1 of the overhead line is switched on, the commercial power carries the load at the rear end, namely the brake oil engine input circuit breaker 31 is switched off, the power generating set 3 is switched off, the brake bypass input load switch 6 and the bypass output load switch 7 are switched off, the input drainage cable 61 and the output drainage cable 71 are taken off in an electrified mode, and the operation of the uninterrupted grid connection system is finished.
The utility model discloses a control system circuit diagram is shown in fig. 2, mainly according to the relevant controller under IG-AVRI module control generator voltage, frequency and the unanimous condition of municipal power grids, the circuit breaker of controlling relevant branch road carries out relevant branch road and does not have the power failure and switches to the realization is incorporated into the power networks and does not have the power failure operation. The controller system mainly comprises an IM-NT controller, an IG-NT networking controller and an IG-AVRI module.
The IM-NT controller module collects relevant data of a mains supply end and controls MCB mains supply to be input into the circuit breaker 41, the IG-AVRI module collects data of an output power end of an engine and transmits the data to a corresponding IG-NT controller group of the generator set 3, and the IG-NT controller controls the GCB1 oil engine to be input into the circuit breaker 31 and transmits corresponding communication data information; data integration is realized, all circuit breakers are controlled to be switched on and off reasonably and consistently, and live working without power outage is realized.
Forward grid connection:
the MCB commercial power input breaker 41 is in a closed state, and the commercial power forms a bypass. The mains supply supplies power to a LOAD of a user; the IM-NT controller detects the mains voltage and the phase sequence, transmits the mains voltage and the phase sequence to the IG-NT through can communication and is processed and analyzed in the network controller.
Starting a G1 generator set 3 of the low-voltage power supply vehicle, detecting whether the voltage and phase sequence of the G1 generator set 3 are consistent with the feedback information of the IM-NT controller or not according to an IG-AVRI module of the low-voltage power supply vehicle, adjusting the voltage, frequency (synchronous with the mains supply) and synchronous phase angle of the generator set through the IG-AVRI module, sending detected load data to the IG-AVRI module, setting values according to load values to meet the sudden load base number, and then automatically closing the GCB1 oil engine input circuit breaker 31 and the MGCB load output circuit breaker 51 (delay closing). And at the moment, the forward grid connection of the medium-voltage power supply and the mains supply is completed, the low-voltage main circuit breaker (namely the column switch 1) is disconnected after the base load value of the IG-NT controller is flexibly loaded to be customized, the MCB mains supply is disconnected and input into the circuit breaker 41, and the mains supply is stopped. The low-voltage power supply vehicle is automatically converted into an independent power supply vehicle from a grid-connected mode to bear the user load in full.
Reverse grid connection:
after the mains supply is restored, the voltage and the phase sequence of the mains supply are detected by the IM-NT controller and transmitted to the IG-NT grid-connected controller, the voltage and the frequency (synchronous with the mains supply) of the whole unit set and the MCB mains supply input circuit breaker 41 is switched on after the synchronous phase angle is adjusted by the IG-AVRI module, and the low-voltage power supply vehicle and the mains supply are reversely connected in a grid mode.
After reverse grid connection, the GCB1 oil engine input breaker 31 and the MGCB load output breaker 51 are switched off, the unit is in cold power failure, the user load supplies power through the commercial power bypass, the user low-voltage main breaker is switched on, the MCB commercial power input breaker 41 is switched off, and the bypass is removed in a charged mode, which is shown in detail in figure 2.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments still belong to the protection scope of the present invention.
Claims (4)
1. The utility model provides a no power failure parallel operation grid-connected system of middling pressure supply vehicle which characterized by: the power supply system comprises a column switch and a power supply vehicle, wherein a generator set, a mains supply input end and a load output end are arranged in the power supply vehicle, the mains supply input end is connected with the load output end through a cable, and is sequentially provided with a mains supply input circuit breaker and a load output circuit breaker, and the generator set in the power supply vehicle is connected in parallel to the input end of the load output circuit breaker through an oil engine input circuit breaker;
the power supply input end is connected with an input load switch through a power supply input cable, the input load switch is connected with the incoming side of the on-column switch through an input drainage cable, the load output end is connected with an output load switch through a load output cable, and the output load switch is connected with the power transmission side of the on-column switch through an output drainage cable.
2. The uninterruptible parallel operation grid-connected system of the medium-voltage power supply vehicle according to claim 1, characterized in that: and the commercial power input end is provided with a copper bar socket or a quick connector.
3. The uninterruptible parallel operation grid-connected system of the medium-voltage power supply vehicle according to claim 1, characterized in that: when the mains supply input cable is in butt joint with the input load switch and the input drainage cable is in butt joint with the input load switch, the phase sequence of A/B/C3 phases of the mains supply input cable and the input drainage cable is consistent with the phase sequence of the input load switch identifier; when the load output cable is in butt joint with the output load switch and the output drainage cable is in butt joint with the output load switch, the phase sequence of the A/B/C3 phases of the load output cable and the output drainage cable is consistent with the phase sequence of the output load switch identification.
4. The uninterruptible parallel operation grid-connected system of the medium-voltage power supply vehicle according to claim 1, characterized in that: the system mainly comprises an IM-NT controller, an IG-NT networking controller and an IG-AVRI module, wherein the IM-NT controller module is connected with a mains supply input end, collects relevant data of a mains supply end and controls a mains supply input circuit breaker, the IG-AVRI module is connected with the generator set and the IG-NT networking controller, collects data of an output power end of an engine and transmits the data to the corresponding IG-NT networking controller of the generator set, and the IG-NT networking controller controls the input circuit breaker of the oil engine and transmits corresponding communication data information.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922427069.3U CN211377605U (en) | 2019-12-30 | 2019-12-30 | Uninterrupted parallel operation grid-connected system of medium-voltage power supply vehicle |
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| CN201922427069.3U CN211377605U (en) | 2019-12-30 | 2019-12-30 | Uninterrupted parallel operation grid-connected system of medium-voltage power supply vehicle |
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| CN211377605U true CN211377605U (en) | 2020-08-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113595227A (en) * | 2021-07-20 | 2021-11-02 | 杭州电力设备制造有限公司 | Low-voltage transformer area load uninterrupted switching system and working method thereof |
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2019
- 2019-12-30 CN CN201922427069.3U patent/CN211377605U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113595227A (en) * | 2021-07-20 | 2021-11-02 | 杭州电力设备制造有限公司 | Low-voltage transformer area load uninterrupted switching system and working method thereof |
| CN113595227B (en) * | 2021-07-20 | 2023-09-15 | 杭州电力设备制造有限公司 | Low-voltage transformer area load uninterrupted switching system and working method thereof |
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