CN204873295U - Cluster elevator electric energy dispatch device based on little electric wire netting of direct current - Google Patents

Cluster elevator electric energy dispatch device based on little electric wire netting of direct current Download PDF

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Publication number
CN204873295U
CN204873295U CN201520430203.4U CN201520430203U CN204873295U CN 204873295 U CN204873295 U CN 204873295U CN 201520430203 U CN201520430203 U CN 201520430203U CN 204873295 U CN204873295 U CN 204873295U
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elevator
direct
electric energy
current grid
energy
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张永明
傅卫东
牛力
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ARTS GROUP CO., LTD.
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Suzhou Industrial Park Design and Research Institute Co Ltd
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Abstract

The utility model discloses a cluster elevator electric energy dispatch device based on little electric wire netting of direct current. Traditional elevator operation in -process utilizes the drain resistor to regenerate power consumption with the elevator to fall, or with electric energy repayment electric wire netting, perhaps regenerates the whole storages of electric energy with the elevator and gets up to recycle. The utility model provides a towards the device that the energy -conserving elevator regeneration electric energy of cluster elevator (more than 2 ones / and 2 ones /) was manageed, found the little electric wire netting of an intelligence building direct current, manage the elevator of regarding as the load through the electric energy of regenerating the elevator to directly utilizes elevator regeneration electric energy, avoided electric energy repayment electric wire netting, avoided the storage of elevator regeneration electric energy all to cause system's problems with high costs. Through the dispatch to crowd's elevator regeneration electric energy, realize that the elevator is energy -conserving, and then reach the effect of intelligent building energy conservation.

Description

Based on the cluster elevator electric energy dispatching device of direct-current grid
Technical field
The utility model relates to a kind of energy-saving device of elevator, particularly relates to the energy saver that cluster elevator/elevator group regenerative electric energy utilizes.
Background technology
In existing building power distribution system, when consideration elevator, only elevator is used as load, for taking into full account because the machine operation of lift facility is when the different conditions, reality also can show as power supply, and the energy of this part is very sufficient.Due to electrical network restriction, the reasons such as technical design defect, this energy only slatterns by usual engineering.
The energy-saving scheme of elevator achieves progress from different perspectives.The four quadrant running of elevator, as shown in Figure 1.Upwards run containing 3 mode of operations: electronic, generating is slowed down and forward regenerative braking.Downward operation is also containing 3 mode of operations: electronic, generating is slowed down and forward regenerative braking.
(1) forward runs motoring condition feature: be operated in first quartile, as A point.Rotating speed is consistent with reference to positive dirction with torque.Energy is transmitted to electrical motor from electrical network, and electrical motor makes positive work.
(2) forward deceleration dynamic brake status flag: be operated in the second quadrant, as B point.Rotating speed is consistent with reference to positive dirction, and electromagnetic torque may be negative (generating).
(3) forward runs feedback generating state feature: be operated in the second quadrant, as B point.Rotating speed is consistent with reference to positive dirction, and electromagnetic torque perseverance is negative, is stable electric generation state.Three, four-quadrant and, two quadrant are similar.During four quadrants of elevator run, two, four-quadrant respectively has a stable state generating state.
And from the cycle of run of elevator, heavy duty is descending, and in underloading, provisional capital is generating state; Remaining underloading is descending and heavy duty is up, is only power consumption state.
The inverter main circuit of alternative-frequency speed-regulation elevator as shown in Figure 2.This inverter is made up of three phase full bridge rectification, capacitor filtering and inversion three part.When elevator is in generating state, the three plase alternating current sent is charged to electric capacity C by the backward diode bridge rectifier in inverter.Elevator detects voltage u c opening switch pipe V during rising 0, make electric current by resistance R 0, switching valve V 0flow to negative pole.In this process, electric energy is at resistance R 0on can consume, otherwise electric capacity C will by pump boosting puncture.
At present, process the method for elevator regenerated electric energy, one is brake unit or braking resistor heating, is slatterned by this part energy ezpenditure on resistance; Two is regenerative electric energy feedback electrical networks, and the mechanical energy that elevator device stores is converted into the AC energy feedback grid meeting the grid-connected requirement of electrical network, again for other consumers; Three is stored by regenerative electric energy, again utilizes for elevator or other equipment.
(1) brake unit or braking resistor heating
The elevator of current more than 98% adopts the mode of regeneration resistance heating to consume the direct current energy stored in electric capacity.Hang on DC bus loop outside regeneration resistance, when the voltage in DC bus loop exceedes the value preset, resistance access DC bus loop will be regenerated, the direct current energy stored in electric capacity is consumed, until the voltage in DC bus loop is lower than preset value by the mode of regeneration resistance heating.Which itself causes energy dissipation, also makes computer room temperature raise, and machine room also needs to install heat abstractor, causes energy source secondary waste.
(2) regenerative electric energy feedback electrical network
The direct current energy stored in electric capacity C is changed into alternating current feedback grid by elevator electric energy feedback, has obvious power savings.Meanwhile, due to non-resistance heat element, computer room temperature declines, and can save the consumption of current of air conditioner in machine room and cooling system.Elevator regenerated electric energy, as a kind of distributed energy, has randomness and intermittent feature, can cause impact to a certain degree to the power supply quality of electrical network; And elevator regenerated electric energy also in architectural electric online operation, may change the feature of the unidirectional trend of traditional architecture switching arrangement; In addition, patent 201420286869.2 is in parallel by multiple elevator DC bus, shares/shares an electric energy feedback apparatus, decrease construction volume and reduce cost.Totally see, electric energy feedback electrical network class technical scheme, though technology is ripe, to apply and few.
(3) regenerative electric energy energy storage and general DC busbar method
By elevator regenerated power storage, then directly again utilize (as patent 201010251559.9) for elevator or other DC equipment, the method is regenerative electric energy feedback electrical network method comparatively, and can avoid inversion link, utilization ratio is higher, and technical advantage is obvious; But the method, elevator regenerated electric energy all to be stored, its charging and discharging currents is large, speed, traditional storage battery is difficult to as closed-center system, need super capacitor etc. can the closed-center system (as patent 201020607246.2) of fast charging and discharging, and super capacitor be with high costs.Visible, though the method has technical advantage, cost is higher, user is difficult to accept, and market rarely has such products application.
In addition, patent 200910071820.9 discloses a kind of elevator group energy saver, and it utilizes DC bus that multi-section elevator is shared an energy storage component, reduces the cost of closed-center system; Patent 200420110175.X and patent 201420219696.2 disclose the energy saver of multiple elevator general DC busbar, do not arrange closed-center system, more reduce cost.Visible, such technology is one of development tendency of elevator energy-saving technology.
Utility model content
Technical problem to be solved in the utility model is the defect overcoming prior art, there is provided a kind of cluster based on grid type direct-current grid elevator regenerated electric energy dispatching device, realize cluster elevator (2/portion and 2/portion more than) energy-conservation, expansion intelligent building DC micro power grid system, the DC load such as flexible access battery-driven car charging.
1, cluster elevator energy-saving is realized.
In China's building, elevator is widely applied, account for about 80% of global elevator selling market, and elevator power consumption accounts for about 10-15% in large-scale (Super High) building, utilize direct-current grid to dispatch elevator regenerated electric energy, low cost elevator energy saving of system can be realized.
2, intelligent building DC micro power grid system is expanded.
Intelligent building direct-current grid in current research, from power supply, is only also consider distributed power generation, as building photovoltaic BIPV etc.; From load, household electrical appliances need to transform as direct current, and electric vehicle DC charging is development tendency.And elevator is as special device, it is load and power supply, and power supply and duty ratio comparatively balance/mate, therefore can direct construction direct-current micro-grid, can be used as the subnet of intelligent building DC micro power grid system.
3, the DC load such as flexible access battery-driven car charging.
Charging pile for electric vehicle is incorporated direct-current grid, and fully by Energy extraction and storage flexibility, and in DC micro-electric network process, the direct storage of DC energy, decreases the switching process of rectification, improves utilization ratio.
For solving the problems of the technologies described above, the utility model takes following technical scheme:
Based on the cluster elevator electric energy dispatching device of direct-current grid, it is characterized in that, positive and negative for the voltage of the frequency converter intermediate DC link of the multi-section elevator in intelligent building two ends are in parallel respectively, build a direct-current grid, in direct-current grid, closed-center system is set;
The regenerative electric energy produced by elevator in intelligent building is dispatched to the elevator of electricity consumption by direct-current grid, as the power supply that its motor runs, unnecessary power storage is in closed-center system.
Described elevator is alternative-frequency speed-regulation elevator.
The motor driving described elevator to run comprises asynchronous dynamo and permagnetic synchronous motor.
Described direct-current grid is the direct-current grid of grid type, between direct-current grid and electrical network, rectifying device is set, realize direct-current grid and obtain electric energy by limiting rectifying device from electrical network, direct-current grid also obtains electric energy from the elevator as power supply, but not to electrical network feedback electric energy.
Also comprise the two-way DC converter that a pair direct-current grid carries out overcurrent or overvoltage protection.
The voltage of described direct-current grid regulates within the specific limits automatically, voltage regulation limits: lower limit is the voltage after electrical network rectifying and wave-filtering, and the upper limit is the voltage of elevator bleeder resistance access.
The load that described direct-current grid connects also comprises the DC load in access intelligent building; The power supply that described direct-current grid connects also comprises the distributed power generation power supply of building integrated photovoltaic power generating system and/or fuel cell power generation etc.
Based on a cluster elevator electric energy dispatching method for direct-current grid, it is characterized in that, positive and negative for the voltage of the frequency converter intermediate DC link of the multi-section elevator in intelligent building two ends are in parallel respectively, build a direct-current grid, in direct-current grid, closed-center system is set;
The regenerative electric energy produced by elevator in intelligent building is dispatched to the elevator of electricity consumption by direct-current grid, as the power supply that its motor runs, unnecessary power storage is in closed-center system.
Described direct-current grid is the grid-connected direct-current grid not going up net type, arranges rectifying device between direct-current grid and electrical network, realizes direct-current grid obtain electric energy from electrical network, not to electrical network feedback electric energy by limiting rectifying device.
The beneficial effect that the utility model reaches:
1, not doing on the basis of any change to existing elevator device, not affecting under elevator safety prerequisite, elevator energy-saving is realized.Utilize the intelligent building direct-current grid built, elevator regenerated electric energy can be realized transmit to electricity consumption elevator, thus realize the scheduling of cluster elevator electric energy, reduce stored energy capacitance, elevator regenerated electric energy locally can be utilized, improve elevator device energy utilization efficiency, achieve elevator energy-efficient;
2, pass through the introducing intelligent building direct current micro-grid system of elevator, building direct current micro-grid system can be allowed to have more energy source, be conducive to applying of intelligent building direct current micro-grid system, and the direct current of elevator regenerated electric energy directly utilizes, itself improves the utilization ratio of direct current energy.
Accompanying drawing explanation
The four quadrant running of Fig. 1 elevator.
Fig. 2 elevator inverter main circuit.
The elevator regenerated electric energy dispatching system of Fig. 3 cluster forms schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described.Following examples only for clearly the technical solution of the utility model being described, and can not limit protection domain of the present utility model with this.
It is energy-conservation that this utility model utilizes DC micro-electric network technology to realize cluster elevator/elevator group, carries out the scheduling of elevator regenerated electric energy realize cluster elevator energy-saving by building direct-current grid.Elevator variable frequency speed-adjusting and control system is as shown in Figure 3 formed, the positive and negative two ends of voltage of n portion elevator frequency converter intermediate DC link are together in parallel respectively, build a direct-current grid, and be connected with closed-center system by reversible DC/DC two-way DC converter, so elevator is as the distributed power source of in intelligent building, become the power supply of direct-current grid, be again a DC load of direct-current grid simultaneously.
This project cluster elevator utilizes direct-current grid to realize the power-economizing method of regenerative electric energy scheduling, with patent 200910071820.9, multi-section elevator is shared compared with a closed-center system, or compared with patent 200420110175.X and 201420219696.2 multiple elevator general DC busbars, all have essence different.
If running process of elevator ignores friction drag and resistance, passenger takes a lift the complete two-way process of the upper next one, ideally goes up and does not consume electric energy, only exist and exchange with the electric energy of this direct-current grid.Now, the direct-current grid constructed by utilization, is dispatched to the elevator as load using elevator regenerated electric energy, achieves the scheduling of energy between different elevator, thus directly utilizes elevator regenerated electric energy, and unnecessary electric energy is temporarily stored by closed-center system and cushions.The electric energy stored, also can be supplied to other load applications in intelligent building direct-current grid, as battery-driven car charging; In addition, other distributed energy resource system also can will applied in intelligent building, as building photovoltaic BIPV, includes this direct-current grid in as power supply, avoids the grid-connected problem of the little difficulty of BIPV capacity.
1, System's composition
Existing elevator device is not being done on the basis of any change, do not affecting under elevator safety prerequisite, system is introduced a direct-current grid and is carried out energy scheduling, mainly comprise: direct-current grid, closed-center system and optional companion module, closed-center system is super capacitor C0, flywheel energy storages etc. can the closed-center system of fast charging and discharging, companion module can adopt DC/DC two-way DC converter, voltage matches situation according to direct-current grid and closed-center system is determined, if the voltage class of closed-center system meets direct-current grid requirement, DC/DC two-way DC converter can not be set.
2, the voltage control of direct-current grid
Direct-current grid voltage determines primarily of elevator frequency converter DC tache voltage, and the factor such as setting cut-in voltage also by closed-center system and elevator bleeder resistance R affects.The voltage of direct-current grid can realize automatic adjustment within the specific limits.The voltage of the utility model direct-current grid does not carry out Isobarically Control, the voltage range of this direct-current grid is, lower voltage limit is the voltage (DC540V) after three phase mains rectifying and wave-filtering, and upper voltage limit is the voltage (being generally DC700V-DC800V) of elevator bleeder resistance access.The rectification that the energy of elevator direct-current link mainly comes from electrical network obtains DC energy, then DC energy is carried out inversion, be supplied to as load elevator motor M1, M2 ... Mn uses.After introducing direct-current grid, when load motor is in generating state, because the rectifying device be connected with electrical network is diode, electric energy can not flow to electrical network, the voltage of filter capacitor C raises along with the increase of energy, at this moment just control two-way DC converter and energy is supplied to closed-center system, then voltage can be reduced to normal value; When motor returns to again loading condition, now energy is by DC link steer motor, then filter capacitor C voltage declines, and at this moment just needs energy supplement, can continue to derive from electrical network rectification, also can control the energy in two-way DC converter acquisition closed-center system.
3, the engineering design of capacity of energy storing device
Direct-current grid capacity of energy storing device adopts engineering experiment method of designing, with reference to evenign peak and load condition initialization system theoretical maximum and minimum value; But in practice, the super-capacitor module of modular form can be adopted, in the debug phase, parallel module quantity is increased and decreased, if it is many that the situations such as evenign peak enter system capacity, with due regard to can to increase capacitance module quantity, expand flexible load with reference to direct-current grid simultaneously and utilize electric energy ability.
4, system protection design
DC/DC two-way DC converter can be adopted direct-current grid overcurrent or overvoltage protection, as the DC link to each elevator frequency converter voltage sets threshold value [ umin, umax], when voltage meets in certain threshold value, just can control two-way DC converter to run, lower than lowest threshold, or higher than lowest threshold, namely during Lift out of order, this two-way DC converter is blocked, then the energy of elevator can not exchange with direct-current grid closed-centre system, and the system of remainder still can continue to run, and ensures the safety and stability of DC micro power grid system.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvement and distortion, these improve and distortion also should be considered as protection domain of the present utility model.

Claims (7)

1., based on the cluster elevator electric energy dispatching device of direct-current grid, it is characterized in that, positive and negative for the voltage of the frequency converter intermediate DC link of the multi-section elevator in intelligent building two ends are in parallel respectively, build a direct-current grid, in direct-current grid, closed-center system is set;
The regenerative electric energy produced by elevator in intelligent building is dispatched to the elevator of electricity consumption by direct-current grid, as the power supply that its motor runs, unnecessary power storage is in closed-center system.
2. the cluster elevator electric energy dispatching device based on direct-current grid according to claim 1, it is characterized in that, described elevator is alternative-frequency speed-regulation elevator.
3. the cluster elevator electric energy dispatching device based on direct-current grid according to claim 1 and 2, it is characterized in that, the motor driving described elevator to run comprises asynchronous dynamo and permagnetic synchronous motor.
4. the cluster elevator electric energy dispatching device based on direct-current grid according to claim 1, it is characterized in that, described direct-current grid is the grid-connected direct-current grid not going up net type, between direct-current grid and electrical network, rectifying device is set, realize direct-current grid and obtain electric energy by limiting rectifying device from electrical network, direct-current grid also obtains electric energy from the elevator as power supply, but not to electrical network feedback electric energy.
5. the cluster elevator electric energy dispatching device based on direct-current grid according to claim 1, is characterized in that, also comprise two-way DC converter direct-current grid being carried out to overcurrent or overvoltage protection.
6. the cluster elevator electric energy dispatching device based on direct-current grid according to claim 1, it is characterized in that, the voltage of described direct-current grid regulates within the specific limits automatically, voltage regulation limits: lower limit is the voltage after electrical network rectifying and wave-filtering, and the upper limit is the voltage of elevator bleeder resistance access.
7. the cluster elevator electric energy dispatching device based on direct-current grid according to claim 1, is characterized in that, the load that described direct-current grid connects also comprises the DC load in access intelligent building; The power supply that described direct-current grid connects also comprises building integrated photovoltaic power generating system and/or fuel cell power generation distributed power generation power supply.
CN201520430203.4U 2015-06-23 2015-06-23 Cluster elevator electric energy dispatch device based on little electric wire netting of direct current Active CN204873295U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104925597A (en) * 2015-06-23 2015-09-23 苏州工业园区设计研究院股份有限公司 Elevator colony electric energy dispatching device and method based on direct-current microgrid
CN107658893A (en) * 2017-10-27 2018-02-02 湖州师范学院 A kind of lifting unit energy recovery utilizing system and control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104925597A (en) * 2015-06-23 2015-09-23 苏州工业园区设计研究院股份有限公司 Elevator colony electric energy dispatching device and method based on direct-current microgrid
CN107658893A (en) * 2017-10-27 2018-02-02 湖州师范学院 A kind of lifting unit energy recovery utilizing system and control method

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GR01 Patent grant
C56 Change in the name or address of the patentee
CP03 Change of name, title or address

Address after: Suzhou City, Jiangsu province 215028 Industrial Park Suzhou Bada Street No. 111

Patentee after: ARTS GROUP CO., LTD.

Address before: Suzhou City, Jiangsu province 215126 Industrial Park Shengpu Kim Seung Road No. 12

Patentee before: Suzhou Industrial Park Design & Research Institute Co., Ltd.