CN207967959U - The two-way grid-connected system of frequency conversion shore electric power - Google Patents
The two-way grid-connected system of frequency conversion shore electric power Download PDFInfo
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- CN207967959U CN207967959U CN201820001278.4U CN201820001278U CN207967959U CN 207967959 U CN207967959 U CN 207967959U CN 201820001278 U CN201820001278 U CN 201820001278U CN 207967959 U CN207967959 U CN 207967959U
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Abstract
The utility model is related to a kind of two-way grid-connected system of frequency conversion shore electric power, which is made of the variable-frequency power sources with auto-parallel function, transformer, breaker, marine generator, power-on box, ship grid-connecting apparatus；Its main feature is that after ship reaches port, ship power supply buses voltage is detected by variable-frequency power sources, it synchronizes after being incorporated to network of ship, generator exits, before ship sails out of harbour, ship power supply buses voltage is detected by ship grid-connecting apparatus, after adjustment boat-carrying generator voltage synchronizes and is incorporated to ship power supply buses, variable-frequency power sources exits, reach two-way grid-connected effect, it is grid-connected by adjusting light load system parameter tracking heavy duty systematic parameter to realize, operate more specification, control is simple, rationally, safety, reliably, improve the stability of whole system, without increasing additional grid-connecting apparatus, reduce cost.
Description
Technical field
The utility model is related to a kind of frequency conversion shore electric power more particularly to a kind of two-way grid-connected systems of frequency conversion shore electric power.
Background technology
Ship power supply uses diesel-driven generator, and environmental pollution is serious, and the prior art passes through frequency conversion during ship reaches port
Power supply powers to it, to achieve the effect that energy-saving and emission-reduction.The prior art carries grid-connecting apparatus using ship, after ship reaches port
By adjusting marine generator output voltage, keep it synchronous with variable-frequency power sources, marine generator is in band and carries state, adjustment at this time
It is not easy, and net spee is slow, does not meet the grid-connected working specification of power grid.Same mode is taken to adjust marine generator before ship departure from port
Variable-frequency power sources is followed, the difference is that generator loading is lighter at this time, variable-frequency power sources is cut off after being easy rapid combination success.After reaching port
With departure from port before be all by ship grid-connecting apparatus adjusting marine generator follow variable-frequency power sources, direction is single, once the grid-connected dress of ship
Failure is set, will be unable to and shore electric power auto-parallel.
Invention content
The problem of the utility model exists for the above-mentioned prior art makes improvements, i.e., technology to be solved in the utility model
Problem is to provide a kind of two-way grid-connected system of frequency conversion shore electric power, and the grid-connected function having using variable-frequency power sources itself and ship are certainly
The auto-parallel device of band has the function of that selection follows heavily loaded power parameter two-way grid-connected to be lightly loaded power supply.
In order to solve the above technical problems, the utility model include variable-frequency power sources, transformer, power-on box, marine generator with
And ship grid-connecting apparatus.The variable-frequency power sources is high pressure or low voltage frequency converter equipment with auto-parallel function, which sets
It is standby have export terminal voltage, control output and its same amplitude, same-phase after breaker by detecting it, the voltage of same frequency, from
And reach the division that PLC controller controls each breaker；Same period controller detects network of ship voltage and marine generator output
Voltage, control marine generator exports the voltage synchronous with network of ship, and sends synchronizing signal to PLC controller.
In the above-mentioned technical solutions, the variable-frequency power sources input is connected by breaker KM11 with power grid, and variable-frequency power sources is defeated
Go out and be connected to transformer through breaker KM12, by being connected into power-on box after transformer, power-on box rear end connects shipboard breaker
KM21, variable-frequency power sources (1) are connect through communication cable with power-on box (3), and ship grid-connecting apparatus (5) interior PLC controller is also through communication
Cable is connect with power-on box (3).
As being further improved for scheme in view of the above technology, the utility model variable-frequency power sources connects voltage transformer
JS11 exports synchronous voltage after entering a port by terminal voltage after variable-frequency power sources detection output breaker KM12, control, and will be same
Step signal is sent to the PLC controller of ship grid-connecting apparatus by communication modes, then by the control breaker switching of PLC controllers
It powers for variable-frequency power sources, marine generator is out of service.The same period, controller was separately connected voltage transformer in ship grid-connecting apparatus
JS21 and voltage transformer JS22, same period controller voltage detecting line is connected respectively to network of ship busbar and marine generator is defeated
Outlet, same period control line are connected with marine generator, and same period signal wire is connected to PLC controller.It is grid-connected by ship before departure from port
The same period controller of device detects and adjustment marine generator output voltage, keeps it synchronous with variable-frequency power sources, and by synchronizing signal
PLC controllers are sent to, then marine generator power supply is switched to by PLC controller control breaker, variable-frequency power sources exits fortune
Row.
In addition, in above-mentioned technical proposal, ship grid-connecting apparatus carries device as ship, have control switching circuit breaker,
Detect network of ship voltage, regulator generator synchronizes, the function with inverter communication control；Also there is adjustment underloading parameter tracking
The two-way grid-connected function of heavily loaded power supply follows ship power supply to be connected to the grid, generator after ship enters harbour by variable-frequency power sources
Work is exited, before ship leaves harbour, the auto-parallel device integrated by power generation system of ship follows variable-frequency power sources, adjustment
Boat-carrying generator output synchronizing voltage is grid-connected, and variable-frequency power sources exits work.
Compared with prior art, the utility model advantageous effect is：
The grid-connected system provides shore electric power using high pressure or low voltage frequency converter, and frequency converter itself has auto-parallel work(
Can, without increasing additional auto-parallel device, and output voltage, set of frequency are flexible, adapt to various ships power supply.
Auto-parallel device uses Communication Control with variable-frequency power sources, only needs software upgrading, control simple, reliable.
The two-way grid-connected function that adjustment underloading supply voltage, frequency, Phase synchronization are incorporated to heavily loaded power supply is realized, electricity is met
Grid-connected working specification is netted, after ship auto-parallel plant failure, the auto-parallel function of variable-frequency power sources can be used, improve simultaneously
The reliability of net system.
Description of the drawings
Fig. 1 is the two-way grid-connected system schematic diagram of the utility model frequency conversion shore electric power.
Specific implementation mode
With reference to Fig. 1, the utility model Control system architecture and principle and specific implementation mode are described in detail.
Variable-frequency power sources 1 itself has auto-parallel function for providing output voltage and the adjustable shore electric power of frequency；
Ship grid-connecting apparatus 5 synchronizes electricity for after detecting network of ship voltage signal, adjusting 4 phase and frequency of marine generator, output
Grid-connected breaker KM22 actions are controlled after pressure is converted to the power supply of marine generator 4；Power-on box 3 is for variable-frequency power sources 1 and ship electricity
The cable interface of net system, including a leader cable and linear quadratic control cable interface.
Implementation steps：After ship reaches port, by power-on box 3 by first and second cable connection, marine generator 4 is in power supply
State, grid-connected breaker KM22 are "on" position, and breaker KM21, breaker KM12 are gate-dividing state；3 correct line of power-on box
Afterwards, breaker KM21 is closed a floodgate, after variable-frequency power sources 1 receives the grid-connected instruction of PLC controller hair, variable-frequency power sources 1 locks ship electricity
Net voltage exports the voltage of same amplitude, frequency, phase as modulation wave signal, and grid-connected cut is controlled after reaching synchronous grid-connected conditions
Cabinet breaker KM12 is changed to close a floodgate；Then frequency converter control system is transmitted to PLC distribution motor signals by RS485 signals, i.e., breaking
Device KM22 separating brakes, ship power switching are shore electric power.With should ship departure from port when, pass through ship grid-connecting apparatus 5 start adjust
The output of marine generator 4 follows variable-frequency power sources 1, and grid-connected breaker KM22 combined floodgates, KM21 separating brakes are controlled after synchronizing；Then will divide
Lock signal is transmitted to frequency convertor system by RS485 signals, and frequency-changing control system automatically switches to KM12 separating brakes, ship power supply
4 power supply of marine generator, then by breaker KM21 separating brakes, remove 3 line of power-on box.
It uses 5 auto-parallel of variable-frequency power sources 1 and ship grid-connecting apparatus respectively when reaching port and departing from port, realizes adjustment underloading
Power parameter follows heavily loaded power supply to reach and synchronizes rear grid-connected, reached two-way grid-connected function.
The above is only the preferred embodiment of the utility model.It should be pointed out that for the ordinary skill people of this field
For member, without departing from the principle of this utility model, various modifications and improvements can be made, these also should be regarded as belonging to
In the scope of protection of the utility model.
Claims (4)
1. a kind of two-way grid-connected system of frequency conversion shore electric power, by the variable-frequency power sources (1) as high pressure or low voltage frequency converter equipment, change
Depressor (2), power-on box (3), marine generator (4) and ship grid-connecting apparatus (5) composition, it is characterised in that：The variable-frequency electric
Source (1) input is connected by breaker KM11 with power grid, and variable-frequency power sources (1) output is connected to transformer (2) through breaker KM12,
By being connected into power-on box (3) after transformer (2)；Power-on box (3) rear end connects shipboard breaker KM21, and variable-frequency power sources (1) is through logical
News cable is connect with power-on box (3), and ship grid-connecting apparatus (5) interior PLC controller is also connect through communication cable with power-on box (3).
2. the two-way grid-connected system of frequency conversion shore electric power according to claim 1, it is characterised in that：The ship grid-connecting apparatus packet
Containing PLC controller and same period controller.
3. the two-way grid-connected system of frequency conversion shore electric power according to claim 1, it is characterised in that：The variable-frequency power sources (1) is even
Meet voltage transformer JS11.
4. the two-way grid-connected system of frequency conversion shore electric power according to claim 1 or claim 2, it is characterised in that：The grid-connected dress of ship
It sets same period controller in (5) and is separately connected voltage transformer JS21 and voltage transformer JS22.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820001278.4U CN207967959U (en) | 2018-01-02 | 2018-01-02 | The two-way grid-connected system of frequency conversion shore electric power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820001278.4U CN207967959U (en) | 2018-01-02 | 2018-01-02 | The two-way grid-connected system of frequency conversion shore electric power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207967959U true CN207967959U (en) | 2018-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820001278.4U Active CN207967959U (en) | 2018-01-02 | 2018-01-02 | The two-way grid-connected system of frequency conversion shore electric power |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111585309A (en) * | 2020-06-04 | 2020-08-25 | 江苏科技大学 | Ship shore power bidirectional grid-connected control system |
| CN114336771A (en) * | 2022-03-07 | 2022-04-12 | 澄瑞电力科技（上海）有限公司 | Self-adaptive control shipborne shore power rapid parallel operation system and method |
| CN116667447A (en) * | 2023-05-17 | 2023-08-29 | 广州航海学院 | Automatic grid-connected system |
-
2018
- 2018-01-02 CN CN201820001278.4U patent/CN207967959U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111585309A (en) * | 2020-06-04 | 2020-08-25 | 江苏科技大学 | Ship shore power bidirectional grid-connected control system |
| CN114336771A (en) * | 2022-03-07 | 2022-04-12 | 澄瑞电力科技（上海）有限公司 | Self-adaptive control shipborne shore power rapid parallel operation system and method |
| CN114336771B (en) * | 2022-03-07 | 2022-07-26 | 澄瑞电力科技（上海）有限公司 | Self-adaptive control shipborne shore power rapid parallel operation system and method |
| CN116667447A (en) * | 2023-05-17 | 2023-08-29 | 广州航海学院 | Automatic grid-connected system |
| CN116667447B (en) * | 2023-05-17 | 2024-02-23 | 广州航海学院 | Automatic grid-connected system |
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