CN114243732A - Boats and ships main power grid electric energy quality control system based on ultracapacitor system - Google Patents
Boats and ships main power grid electric energy quality control system based on ultracapacitor system Download PDFInfo
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- CN114243732A CN114243732A CN202111445969.6A CN202111445969A CN114243732A CN 114243732 A CN114243732 A CN 114243732A CN 202111445969 A CN202111445969 A CN 202111445969A CN 114243732 A CN114243732 A CN 114243732A
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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
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/08—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems requiring starting of a prime-mover
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
-
- 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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
The invention discloses a ship main power grid power quality control system based on a super capacitor, which is characterized in that: the system comprises a super capacitor bank, a capacitor charging/inverting output unit and a special monitoring control device, wherein the super capacitor bank is merged into a ship power grid through the capacitor charging/inverting output unit, the special monitoring control device monitors operation parameters of the power grid, prejudges the condition of the power grid and controls input and output of the super capacitor bank. According to the invention, the super capacitor is combined with the ship diesel generator set, so that the power quality and the power supply continuity of a power grid are effectively improved. The auxiliary high-power load starting is realized by utilizing the characteristics of quick charge and discharge of the super capacitor, free and controllable output of the inverter and the like; stabilizing the voltage fluctuation of the power grid caused by the load change of the main power grid; the problem of three-phase imbalance is effectively solved; providing an uninterrupted power supply for the fault switching of the generator set; and the power factor of the power grid is compensated, and the reactive loss is reduced.
Description
Technical Field
The invention relates to a supercapacitor-based power quality control system of a main power grid of a ship, and belongs to the field of main power sources of ships.
Background
The vessel main power station is one of the important facilities of the vessel. The main power station of the current main ship is mostly configured as a diesel generator set. But due to the characteristics of the ship power grid: the capacity is smaller than shore power, the type and the form of power loads are complex, the dynamic response of the diesel generator set is slower, and the like, so that the quality of electric energy is poorer. In the practical application process, the following problems mainly exist:
1) the capacity of the power grid is small, the dynamic response of the diesel generator set is slow, and the stability of the power grid is easily influenced by load fluctuation.
2) Three-phase imbalance caused by single-phase load unevenness is difficult to solve.
3) The standby generator is not started in time in case of power failure switching or emergency, so that short-time power loss of the whole ship is caused.
4) The load quantity and variety of ship power stations are large, and the power factor of a power grid is difficult to control. Especially, the load of an asynchronous motor of a ship power station is large, and the power factor of a power grid can be obviously reduced due to poor matching of the motor, an oil water pump and a fan, so that the reactive power supply is insufficient.
Different from ship emergency power stations, on the same ship, the capacity of the emergency power station is far smaller than that of a main power station and the emergency power station is only used in a short time during the fault period of a main power grid, and the emergency power station has the biggest difficulty that the high-power load is difficult to start and the requirement on the quality of electric energy is not high. The main power station is used in most of the time of ship navigation, the number of electric loads is large, and the load power is large. Because the main power station has long working time, the electric energy quality greatly influences the safety of ships, the fuel consumption rate and the health condition of electric equipment, and the optimization of the main power grid is more biased to the improvement of the electric energy quality. At present, the specification only has requirements on the aspects of voltage, frequency, harmonic waves and the like of a ship power grid, and the power quality of the power grid has a larger improvement space.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the existing ship power grid configuration is mostly a diesel generator set, and the power quality is poor.
In order to solve the above problems, the technical solution of the present invention is to provide a supercapacitor-based power quality control system for a ship main power grid, which is characterized in that: the system comprises a super capacitor bank, a capacitor charging/inverting output unit and a special monitoring control device, wherein the super capacitor bank is merged into a ship power grid through the capacitor charging/inverting output unit, the special monitoring control device monitors operation parameters of the power grid, prejudges the condition of the power grid and controls input and output of the super capacitor bank.
Preferably, the super capacitor bank comprises a super capacitor bank I and a super capacitor bank II, the charging/inverting output unit comprises a charging/inverting output unit I and a charging/inverting output unit II, and the super capacitor bank I is connected with the distribution board main bus bar through the charging/inverting output unit I and outputs three-phase electric energy to the distribution board main bus bar; the two-way charging/inverting output unit II of the super capacitor bank is connected with a ship AC220V distribution board, and outputs three-way independent single-phase to a ship AC220V distribution board for adjusting the three-phase balance of an AC220V power grid.
Preferably, the first super capacitor bank is on the grid in real time, and the special monitoring and controlling device controls the input and output of the first super capacitor bank when monitoring the abnormal voltage of the grid, and reversely operates, discharges or charges the load of the grid on and off the line.
Preferably, the super capacitor bank is controlled by a special monitoring control device to output energy to a power grid through the charging/inverting output unit.
Preferably, when the special monitoring and controlling device detects that the three-phase imbalance exceeds a set value, the special monitoring and controlling device controls the charging/inverting output unit to output each phase of the two phases independently, and adjusts each phase of current as required to meet the three-phase balancing requirement of the AC220V power grid.
Preferably, after monitoring a serious fault alarm signal or a manual instruction of the generator, the special monitoring and control device controls the charging/inverting output unit to output power to the main power grid according to the requirement to be used as the short-time power supply of the whole ship uninterrupted power supply.
Preferably, when the special monitoring and controlling device monitors that the power factor of the power grid is lower than a set value, the special monitoring and controlling device controls the reactive output of the first charging/inverting output unit to perform reactive compensation on the power grid.
Preferably, the operating parameters of the power grid include load, voltage, power factor and three-phase balance parameters of the power grid.
Preferably, the capacitance of the super capacitor bank is of a power type.
Preferably, the power distribution board is arranged in parallel or separately with the main distribution board of the ship and is connected by a cable.
Compared with the prior art, the invention has the beneficial effects that:
1) the high-power load can be effectively assisted to start, the load starting impact is reduced, and the cost of the whole ship starter is reduced;
2) reducing the voltage fluctuation of the power grid caused by the load change of the main power grid;
3) the problem of three-phase imbalance caused by uneven load is effectively solved;
4) an uninterrupted power supply is provided for the main generator during switching, and the power loss of the whole ship possibly caused by switching is reduced;
5) the reactive power of the power grid can be compensated, the reactive loss is reduced, and the stability of the power grid is maintained;
6) the system is independent, the requirement on equipment arrangement environment is low, and the installation is convenient;
7) the service life of the equipment is equivalent to that of the whole ship, and the equipment does not need to be replaced in the later period after being additionally installed at one time.
Drawings
FIG. 1 is a single line diagram of a supercapacitor-based marine main grid power quality control system;
fig. 2 is a flow chart of main functions of a supercapacitor-based power quality control system of a main power grid of a ship.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
The invention relates to a supercapacitor-based ship main power grid power quality control system which is independently formed into a cabinet and is arranged in parallel or independently with a ship main distribution board, and the cabinet and the ship main distribution board are connected by cables.
The system comprises a super capacitor bank, a capacitor charging/inverting output unit and a special monitoring control device, which are all arranged in a power quality control system cabinet. The system is provided with a special monitoring control device, so that the safety and the corresponding speed of the system are improved. The special monitoring and controlling device has the advantages that parameters such as power grid load, voltage, power factor, three-phase balance and the like can be monitored, the power grid condition can be pre-judged, and input and output of the super capacitor bank can be controlled.
The super capacitor bank comprises a super capacitor bank I and a super capacitor bank II, and the super capacitor is in a power type in consideration of the system volume and the charging and discharging power. The charging/inverting output unit comprises a charging/inverting output unit I and a charging/inverting output unit II. The super capacitor bank I is connected with the distribution board main bus bar through the charging/inverting output unit I and outputs three-phase electric energy to the distribution board main bus bar. The two-way charging/inverting output unit II of the super capacitor bank is connected with a ship AC220V distribution board, and outputs three-way independent single phase to a ship AC220V distribution board for adjusting the three-phase balance of an AC220V power grid.
The super capacitor bank I is in a real-time network and serves as a shared auxiliary starter of the whole ship high-power equipment to assist the high-power equipment to start. And the special monitoring and controlling device monitors the abnormal voltage of the power grid, and controls the input and the output of the capacitor bank to stabilize the voltage fluctuation.
The power quality control system can realize the following functions:
1. auxiliary high-power load starting:
when a high-power load is started, a grid set is added or a voltage reduction starting mode is adopted. The invention adopts the auxiliary starting of the generator matched with the super capacitor group, and can realize direct or star-delta starting without starting a standby unit or adopting expensive starting modes such as frequency conversion and the like. When the high-power load is started, the super capacitor bank is controlled by the special monitoring control device to output energy to the power grid through the charging/inverting output unit, and most or even all of the sudden load is shared. The main generator set bears a small sudden load, and the voltage drop of the whole power grid can be controlled within an allowable range. Particularly, the auxiliary starter has the effect of sharing the auxiliary starter on a ship provided with a plurality of high-power loads, and the cost of the whole ship starter is effectively reduced.
2. Reducing grid voltage fluctuations caused by changes in main grid load
The ship power grid capacity is relatively small, the power consumption load is large, the start and stop are frequent, and the power grid fluctuation is large. The special monitoring control device monitors the voltage of the power grid and the load condition of the system in real time, and the super capacitor bank is controlled by the special monitoring control device to reversely operate, charge or discharge. Voltage fluctuation caused by load variation is stabilized.
3. Effectively solves the problem of three-phase imbalance caused by uneven load
In addition to faults, the three-phase imbalance of the marine power station mainly occurs in an AC220V power grid and is caused by load imbalance of a single-phase AC220V in the grid. For single phase loads on the vessel, the three phase balanced connections are considered sufficient in the system design. However, in actual use, due to the high randomness of the load use, the expected three-phase balance result cannot be achieved. The reverse order current generated by three-phase imbalance will increase the line power loss. Since single-phase load use has certain randomness, the conventional power station cannot solve the three-phase imbalance problem. When the special monitoring and controlling device detects that the three-phase imbalance exceeds a set value, the special monitoring and controlling device controls the two phases of the charging/inverting output unit to output independently, and the phase current is adjusted according to the requirement to meet the three-phase balance requirement of the AC220V power grid.
4. Providing uninterrupted power supply for power supply switching
When a main generator set of a ship breaks down, a standby generator set cannot be put into a power grid in time, and the short-time power loss condition of the whole ship can occur, so that the safety of the ship is affected. The invention can send out instructions to the special monitoring control device when the main generator set fails and the power station sends out a standby machine starting signal, the special monitoring control device controls the charging/inverting output unit to output power to the main power grid according to the requirement, and the standby generator is used as a power grid UPS before starting, thereby reducing the power loss of the whole ship caused by power supply switching to the maximum extent. And the fault unit is stopped in time, and the damage of the fault to the unit is reduced. The specifications require that the standby genset be brought into the grid within 45 seconds, so the UPS on time does not exceed 45 seconds.
5. Reactive compensation is carried out on the power grid to ensure the normal work of the equipment
The ship power grid equipment is complex, the number of power electronic equipment is increased, and some special equipment has low self power factor and high power, so that the power factor of the power grid can be obviously reduced when the ship power grid equipment is used. In addition, the oil water pump fan on the ship basically adopts an asynchronous motor, and when the motor, the pump and the fan are not properly matched, the power factor of a power grid is obviously reduced. Low power factor operation can affect the efficiency of the generator set and reduce the life of the generator. In the worst case, when the reactive demand exceeds the value provided by the generator set, neither the motor nor the transformer can work properly. According to the invention, when the special monitoring and controlling device monitors that the power factor of the power grid is lower than a set value, the reactive output of the charging/inverting output unit I is controlled, so that the reactive compensation effect on the power grid is achieved.
Taking the application of the invention on a specific ship as an example, a main power station is configured to be 3 1400kW diesel generator sets, a ship power grid and power quality control system are shown in a single line diagram in fig. 1, and a main function flow diagram of the ship power grid power quality control system is shown in fig. 2. The capacity of the super capacitor bank of the power quality control system is not more than 15kWh, the maximum output power of the water-cooled inverter is about 300kW, and the power quality control system and the monitoring control system can be assembled in a 1000mmx900mmx2000mmm (width x depth x height) cabinet. Because the super capacitor has small heat productivity and good safety, the cabinet can be arranged in most cabins of the whole ship without special refrigeration and fire prevention requirements.
The following is a description of the relevant function implementation process:
1. auxiliary high-power load starting:
the ship type maximum power load is a ballast pump, the power is 450kW, the original design starting mode is autotransformer starting, a standby generator is needed to start, and the ballast pump can be started after the two generators are connected to the grid. After the power quality control system is added, a heavy-load starting inquiry signal is sent to the power station before the high-power load is started, and according to the size of the load to be started, the special monitoring and control device controls the charging/inverting output unit to output energy to the power grid, so that most or even all of the sudden load is borne, and the duration is 5-10 seconds. Because the main generator set bears a small sudden load, the voltage of the whole power grid is basically not influenced by the large-load starting. The ballast pump starter can also be adjusted to be a star-delta start with lower price or even a direct start. Similarly, other high-power loads of the power grid can be started by the aid of a 'shared' power quality control system without being provided with expensive starters such as frequency conversion starters and autotransformers.
2. Reducing grid voltage fluctuations caused by changes in main grid load
Similar to the starting of an auxiliary heavy load, a special monitoring control device monitors the voltage of a power grid and the load condition of a system in real time, and a super capacitor bank I and a charging/inverting output unit I are controlled by the special monitoring control device to reversely operate the upper line and the lower line of the load of the power grid, discharge or charge and stabilize the voltage fluctuation caused by the load change.
3. Effectively solves the problem of three-phase imbalance caused by uneven load
The capacity of the AC380V/AC220 lighting transformer of the exemplary ship is 150kVA, the capacity of the three-phase balance special capacitor bank is about 1-2kWh according to the single-phase load capacity and the distribution condition, three paths of single-phase 30kVA output can be provided, and the three-phase balance requirement in the extreme condition is completely met.
When the special monitoring control device detects that the three-phase imbalance of the AC220V power grid exceeds a set value, the special monitoring control device adjusts the output of each phase of the charging/inverting output unit II to the AC220V distribution board bus bar so as to meet the three-phase balance requirement of the AC220V power grid.
4. Providing uninterruptible power supply for main power supply switching
When the main generator set of the ship has a serious fault, an instruction is sent to the special monitoring control device through automatic detection or manual operation, the charging/inverting output unit outputs electric energy to a main power grid according to required power, all non-important loads are tripped at the same time, and the charging/inverting output unit is used as a power grid uninterrupted power supply before the standby generator is started. When the load is transferred to the UPS, the fault unit is stopped, and damage of the fault to the unit is reduced to the maximum extent. The minimum electrical power required to maintain the short-term safety of the exemplary vessel is about 200kW (including steering, lighting, communications, etc.) and the 45 second power draw is about 2.5 kWh. Under the working condition, the output electric quantity of the capacitor is the maximum, the capacitor of the electric energy quality control system is configured according to the maximum output capacity of 2.5kWh, and the output power of the inverter is configured according to the power not less than 200 kW. Considering the depth of discharge and system loss, and the instant capacity of the capacitor, the capacity is 4-5kWh, and the discharge rate is 40-50C.
5. Reactive compensation is carried out on the power grid to reduce reactive loss
The power factor of the ship generator set is 0.8, the power factor of a power grid is too high, the operation stability of the generator set can be reduced, and the efficiency of the generator set is influenced and the service life of a generator is reduced if the power factor of the power grid is too low. In a normal ship power grid, the proportion of motors in a load is high, and most motors run below rated power, so that the power factor of the power grid is low. When the special monitoring and controlling device monitors that the power factor of the power grid is lower than the power factor of the generator set, namely lower than 0.8, the special monitoring and controlling device controls the super capacitor set to be charged quickly, and simultaneously adjusts the reactive power required by the output power grid of the charging/inverting output unit, so that the power factor of the power grid is adjusted, and the generator set is guaranteed to work at the optimal power factor point.
According to the invention, the super capacitor with a certain capacity is configured according to the ship power grid, the capacitor runs in parallel with the power grid through the inverter, the super capacitor bank is merged into the ship power grid, the large-multiplying-power charging and discharging characteristics of the super capacitor are utilized, and the inverter output is combined to be freely controlled, so that the power grid voltage fluctuation caused by the load change of the ship power grid is reduced; solving the three-phase imbalance caused by uneven load; the uninterrupted power supply is provided for the main power supply switching, so that the power loss of the whole ship caused by the power supply switching is reduced; the reactive power of the power grid is compensated, the reactive loss is reduced, and the electric energy quality of the ship power grid can be effectively improved. Through the combination of the super capacitor and the ship diesel generator set, the power quality and the power supply continuity of a power grid are effectively improved. Meanwhile, compared with a battery, the super capacitor has longer service life, particularly a power type super capacitor, the charging and discharging service life reaches millions of times, and the service life can be equivalent to the service life of the whole ship.
Claims (10)
1. The utility model provides a boats and ships main power grid electric energy quality control system based on ultracapacitor system which characterized in that: the system comprises a super capacitor bank, a capacitor charging/inverting output unit and a special monitoring control device, wherein the super capacitor bank is merged into a main ship power grid through the capacitor charging/inverting output unit, the special monitoring control device monitors the operation parameters of the power grid, prejudges the condition of the power grid and controls the input and the output of the super capacitor bank.
2. The supercapacitor-based marine main grid power quality control system according to claim 1, wherein: the super capacitor bank comprises a super capacitor bank I and a super capacitor bank II, the charging/inverting output unit comprises a charging/inverting output unit I and a charging/inverting output unit II, and the super capacitor bank I is connected with the main distribution board bus bar through the charging/inverting output unit I and outputs three-phase electric energy to the distribution board main bus bar; the two-way charging/inverting output unit II of the super capacitor bank is connected with a ship AC220V distribution board, and outputs three-way independent single-phase to a ship AC220V distribution board for adjusting the three-phase balance of an AC220V power grid.
3. The supercapacitor-based marine main grid power quality control system according to claim 2, wherein: when the first super capacitor bank is on the network in real time, the special monitoring and controlling device controls the input and the output of the first super capacitor bank when monitoring the abnormal voltage of the power grid, and reversely operates the load of the power grid on and off the line, and discharges or charges.
4. The supercapacitor-based marine main grid power quality control system according to claim 2, wherein: and one super capacitor bank is controlled by a special monitoring control device to output energy to a power grid through the charging/inverting output unit.
5. The supercapacitor-based marine main grid power quality control system according to claim 2, wherein: when the special monitoring and controlling device detects that three-phase imbalance of the AC220V power grid exceeds a set value, the special monitoring and controlling device controls the two phases of the charging/inverting output unit to output independently, and adjusts the phase current according to the requirement to meet the three-phase balance requirement of the power grid.
6. The supercapacitor-based marine main grid power quality control system according to claim 2, wherein: after monitoring a serious fault alarm signal or a manual instruction of the generator, the special monitoring and controlling device controls the charging/inverting output unit to output power to a main power grid according to the required power, and the power is used as short-time power supply of the whole ship uninterrupted power supply.
7. The supercapacitor-based marine main grid power quality control system according to claim 2, wherein: and when monitoring that the power factor of the main power grid is lower than a set value, the special monitoring and control device controls the reactive output of the charging/inverting output unit I to perform reactive compensation on the power grid.
8. The supercapacitor-based marine main grid power quality control system according to claim 1, wherein: the operating parameters of the main grid include load, voltage, power factor and three-phase balance parameters of the grid.
9. The supercapacitor-based marine main grid power quality control system according to claim 1, wherein: and the capacitance of the super capacitor group is of a power type.
10. The supercapacitor-based marine main grid power quality control system according to claim 1, wherein: arranged in parallel or separately with the vessel main switchboard and connected by cables.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111445969.6A CN114243732A (en) | 2021-11-30 | 2021-11-30 | Boats and ships main power grid electric energy quality control system based on ultracapacitor system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111445969.6A CN114243732A (en) | 2021-11-30 | 2021-11-30 | Boats and ships main power grid electric energy quality control system based on ultracapacitor system |
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| CN114243732A true CN114243732A (en) | 2022-03-25 |
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| CN202111445969.6A Pending CN114243732A (en) | 2021-11-30 | 2021-11-30 | Boats and ships main power grid electric energy quality control system based on ultracapacitor system |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044905A (en) * | 2009-10-13 | 2011-05-04 | 皆盈绿电池股份有限公司 | Electric energy system power supply device with switchable super capacitor for supplying electric energy |
| US20140103727A1 (en) * | 2012-10-11 | 2014-04-17 | Earl Energy, LLC | Island grid power supply apparatus and methods using energy storage for transient stabilization |
| FR2999147A1 (en) * | 2012-12-11 | 2014-06-13 | Mediterranee Const Ind | AUTOMOTIVE VESSEL INTENDED TO INTERVENE ON FIXED FACILITIES AT SEA, SUCH AS WIND TURBINES AT SEA |
| CN205489618U (en) * | 2016-01-18 | 2016-08-17 | 武汉理工大学 | Compound energy storage system of electrically propelled ship oceangoing ship based on super capacitor and battery |
| CN106099986A (en) * | 2016-08-03 | 2016-11-09 | 中广核研究院有限公司 | A kind of isolated island comprehensive energy supply and safeguards system |
| CN206679237U (en) * | 2017-03-23 | 2017-11-28 | 山西汾西重工有限责任公司 | The fault traversing system of ship direct current networking electric propulsion system |
| CN108347063A (en) * | 2018-01-17 | 2018-07-31 | 武汉理工大学 | A kind of ship grid-connected photovoltaic system based on super capacitor energy-storage |
| NO20191280A1 (en) * | 2019-10-25 | 2021-04-26 | Kongsberg Maritime As | Power supply system |
-
2021
- 2021-11-30 CN CN202111445969.6A patent/CN114243732A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044905A (en) * | 2009-10-13 | 2011-05-04 | 皆盈绿电池股份有限公司 | Electric energy system power supply device with switchable super capacitor for supplying electric energy |
| US20140103727A1 (en) * | 2012-10-11 | 2014-04-17 | Earl Energy, LLC | Island grid power supply apparatus and methods using energy storage for transient stabilization |
| FR2999147A1 (en) * | 2012-12-11 | 2014-06-13 | Mediterranee Const Ind | AUTOMOTIVE VESSEL INTENDED TO INTERVENE ON FIXED FACILITIES AT SEA, SUCH AS WIND TURBINES AT SEA |
| CN205489618U (en) * | 2016-01-18 | 2016-08-17 | 武汉理工大学 | Compound energy storage system of electrically propelled ship oceangoing ship based on super capacitor and battery |
| CN106099986A (en) * | 2016-08-03 | 2016-11-09 | 中广核研究院有限公司 | A kind of isolated island comprehensive energy supply and safeguards system |
| CN206679237U (en) * | 2017-03-23 | 2017-11-28 | 山西汾西重工有限责任公司 | The fault traversing system of ship direct current networking electric propulsion system |
| CN108347063A (en) * | 2018-01-17 | 2018-07-31 | 武汉理工大学 | A kind of ship grid-connected photovoltaic system based on super capacitor energy-storage |
| NO20191280A1 (en) * | 2019-10-25 | 2021-04-26 | Kongsberg Maritime As | Power supply system |
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