CN110994627B - Electric heat storage device configuration system - Google Patents
Electric heat storage device configuration system Download PDFInfo
- Publication number
- CN110994627B CN110994627B CN201911373136.6A CN201911373136A CN110994627B CN 110994627 B CN110994627 B CN 110994627B CN 201911373136 A CN201911373136 A CN 201911373136A CN 110994627 B CN110994627 B CN 110994627B
- Authority
- CN
- China
- Prior art keywords
- heat storage
- electric heat
- storage device
- solid
- peak
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005338 heat storage Methods 0.000 title claims abstract description 181
- 239000007787 solid Substances 0.000 claims abstract description 74
- 239000007788 liquid Substances 0.000 claims abstract description 67
- 230000009466 transformation Effects 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 230000001105 regulatory effect Effects 0.000 claims description 16
- 239000007858 starting material Substances 0.000 claims description 13
- 238000005191 phase separation Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 11
- 238000009825 accumulation Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0056—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using solid heat storage material
-
- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
-
- 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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention provides an electric heat storage device configuration system, which comprises a power grid, a voltage transformation device and a peak regulation system connected with the power grid, wherein the peak regulation system comprises a solid electric heat storage device (3) and a liquid electric heat storage device (4), and when the solid electric heat storage device (3) and/or the liquid electric heat storage device (4) are started, an input voltage input to the solid electric heat storage device (3) and/or the liquid electric heat storage device (4) is increased to a specified voltage in a slope mode. The intelligent smooth deep peak regulation system for the power grid can realize intelligent smooth deep peak regulation of the power grid, reduce impact on the power grid, and meet the requirements of heat supply civilian life and peak regulation of the power grid.
Description
The application is a divisional application of the application patent application with the application date of 2017, 01, 23, 201710058624.2 and the name of 'an electric heat storage device configuration system'.
Technical Field
The invention relates to the field of electric power deep peak regulation design, in particular to the field of scheme configuration design of an electric heat storage peak regulation device of a cogeneration power plant.
Background
The cogeneration unit operates in a heat and electricity fixing mode, and the peak regulating capacity is only about 10 percent. Peak shaving difficulties have become the most prominent problem in grid operation. The contradiction between the peak regulation of the power grid and the heat supply of the thermal power generating unit is not good, and the safety of heating of residents in winter can be affected, so that the residents are related to folks. In the current stage, the cogeneration power plant is mainly a 2X 300 MW-level unit, and a plurality of groups of solid electric heat storage devices with total capacities of 240-320 MW different can be configured to complete the peak shaving of the unit in order to meet the power grid depth peak shaving requirement. The solid electric heat accumulation peak shaving device has the characteristics of high voltage, high power and heat accumulation, but the power is not adjustable. The high-power electrode water heater device does not have a heat storage function, but the power can be adjusted steplessly. Because the peak shaving load of the power grid is continuously changed in real time, the load sent out by the power plant needs to be continuously, smoothly and stably adjusted. If the solid electric heat storage device is simply adopted, the power range cannot be adjusted, so that the peak shaving capacity of a unit of the power plant cannot be deeply excavated, and the overall peak shaving economy is affected; the electrode water heater device is flexible to operate and convenient for deep peak shaving, but cannot meet the requirements of continuous heating of residents in winter due to the fact that the electrode water heater device does not have a heat storage function, and the hot water tank is configured for storing water in some projects, but is difficult to meet the requirements of heating in a large area due to the fact that the heat storage capacity of the hot water tank is limited.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a configuration system of the electric heat storage peak shaving device, which is relatively safe and reliable, flexible to operate and free from excessive limitation on the construction conditions of a power plant, and can realize intelligent smooth deep peak shaving of a power grid, reduce the impact on the power grid, and not only meet the guarantee of heat supply civilian life, but also meet the peak shaving requirement of the power grid.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides an electric heat accumulation device configuration system, includes peak shaving system, transformer unit and electric wire netting, peak shaving system sets up many sets of solid electric heat accumulation device, sets up one set or many sets of liquid electric heat accumulation device simultaneously, solid electric heat accumulation device with liquid electric heat accumulation device passes through the electric wire netting and connects.
Preferably, the whole power plant is taken as a unit, an inlet wire interval is newly added on an original bus of the power plant and is connected with a step-down transformer, the other end of the step-down transformer is connected with a peak regulation system bus, and the solid electric heat storage device and the liquid electric heat storage device are connected to the peak regulation system bus.
In any of the above schemes, preferably, a step-down transformer matched with the power supply voltage of the liquid electric heat storage device can be arranged between the liquid electric heat storage device and the bus of the peak shaving system according to actual needs.
In any of the above schemes, preferably, each unit is taken as a whole unit, and the peak shaving system bus is connected to the generator outlet main enclosed bus through the outlet breaker T.
Preferably, any of the above aspects, the peak shaving system bus comprises an off-phase bus.
Any of the above-described solutions is preferred in that each feeder cabinet is connected to the solid, liquid electrical heat storage device via a cable.
In any of the above schemes, preferably, the solid electric heat storage device is provided with GIS switch equipment or bus switch equipment in a matching way according to actual engineering requirements.
In any of the above schemes, the newly added line interval, the transformer, the GIS equipment, the solid electric heat storage device and the liquid electric heat storage device are preferably connected by adopting steel-cored aluminum stranded wires or cables according to actual engineering requirements.
In any of the above embodiments, the solid electric heat storage device preferably has a voltage level in the range of 10 to 66kV.
In any of the above embodiments, the solid state electric heat storage device preferably has a power in the range of 10 to 100MW.
Preferably, in any of the above aspects, the liquid electric heat storage device comprises a high-power electrode water heater.
In any of the above embodiments, the liquid electric heat storage device preferably has a voltage level in the range of 6 to 20kV.
Preferably, in any of the above aspects, the liquid electric heat storage device has a power in the range of 0 to 50MW.
Preferably, in any of the above aspects, the power of the liquid electric heat storage device can be adjusted steplessly in the range of 0% -100%.
According to the electric heat storage device configuration system, a plurality of sets of solid electric heat storage devices are configured to serve as peak shaving main bodies, one or a plurality of sets of liquid electric heat storage devices with stepless adjustable power ranges are configured to serve as supplementary means capable of stepless adjustment, on the premise that too much occupied area is not increased, the deep peak shaving capacity of a thermal power plant is improved, and the flexibility of intelligent smooth deep peak shaving of the thermal power plant is improved.
The solid and liquid electric heat storage device has the advantages that the solid and liquid electric heat storage device has the selectable of various voltage grades, so that various power supplies of peak shaving equipment of the thermal power plant have various leading schemes, the construction conditions of the power plant are not excessively limited, and the peak shaving construction is facilitated by more fully utilizing the existing conditions.
At present, each set of solid electric heat storage device is internally provided with a plurality of groups of resistance wires in a series-parallel connection mode to form an electric heating group, and the electric heating group is used as a start-stop unit to start and stop simultaneously, the maximum start-stop capacity can reach 100MW, and the electric heating group causes great impact on a power grid and influences the safe operation of the power grid. In view of this, the present invention solves this problem in several ways as follows.
1. A ramp up soft starter is employed. The main constitution of the soft starter is a three-phase anti-parallel high-voltage thyristor connected in series between a power supply and an electric heat storage device and an electronic control circuit thereof. The soft starter is controlled to control the conduction angle of the internal thyristor, so that the input voltage of the electric heat storage device gradually rises from zero in a preset function relation until the starting is finished after the input voltage rises to the rated voltage. The impact of the electric heat storage device on the power grid is reduced through the step-by-step voltage regulation of the soft starter.
2. The series variable resistor voltage-reducing starting mode is adopted. A set of variable resistance starting cabinet is connected in series between the power supply and the solid electric heat storage device, and the variable resistance cabinet can be a thermal resistor or a liquid resistor. When the solid electric heat storage device is connected to a power grid, the resistance of the variable resistor is regulated steplessly and smoothly according to a preset resistance value until the starting is finished after the resistance value is close to 0, so that the input voltage of the solid electric heat storage device is increased continuously until the rated voltage is reached, and the impact of full-voltage starting on the power grid is avoided.
Drawings
Fig. 1 is a schematic diagram of a preferred embodiment of the electrical heat storage device configuration system of the present invention as a unit of an entire power plant.
Fig. 2 is a schematic diagram of another preferred embodiment of the electrical heat storage device configuration system of the present invention as a unit of an entire power plant.
Fig. 3 is a schematic view of a preferred embodiment of the electric heat storage device configuration system of the present invention with each unit as a whole.
Fig. 4 is a schematic view of another preferred embodiment of the electric heat storage device configuration system of the present invention with each unit as a unit.
Fig. 5 is a block diagram of a preferred embodiment of a ramp-up soft starter main circuit of an electric heat storage device configuration system in accordance with the present invention.
Fig. 6 is a block diagram of a preferred embodiment of a variable resistance start tank main circuit of an electric heat storage device configuration system according to the present invention.
The diagram is:
1-220/66kV step-down transformer, 2-66kV bus, 3-solid electric heat storage device, 4-liquid electric heat storage device, 5-66/20kV step-down transformer, 6-220KV bus, 7-220/20kV step-down transformer, 8-20KV bus, 9-main transformer, 10-generator, 11-second generator, 12-first generator, 13-first outgoing line, 14-second outgoing line, 15-A phase, 16-B phase, 17-C phase, 18-slope step-up soft starter and 19-variable resistor starting cabinet.
Detailed Description
For a further understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings and are not intended to be limiting; any insubstantial modifications of the invention as described above would be within the scope of the invention.
Example 1
As shown in fig. 1, the electric heat storage device configuration system comprises a peak regulation system, a voltage transformation device and a power grid, wherein the peak regulation system is provided with a plurality of sets of solid electric heat storage devices 3 and a set of liquid electric heat storage devices 4, and the solid electric heat storage devices 3 and the liquid electric heat storage devices 4 are connected in parallel through the power grid.
In the embodiment, the whole power plant is taken as a whole unit, the power supply voltage of the electric heat storage device is 66kV level, and the liquid electric heat storage device 4 is a high-power electrode water heater. An incoming line interval is newly added on an original 220kV bus 6 of a power plant, and the incoming line interval is regulated to 66kV through a 220/66kV step-down transformer 1 and then is used by a solid electric heat storage device 3, and 66kV GIS switch equipment is arranged on the electric heat storage device in a matching way to serve as a normal start-stop control switch of the electric heat storage device. A66/20 kV step-down transformer 5 is arranged for regulating the voltage to 20kV and then is used for supplying power to the water heater device. The 220kV newly increased line interval, the step-down transformer, the 66kV GIS equipment and the electric heat storage device can be connected by adopting a steel-cored aluminum stranded wire or a cable according to specific engineering conditions.
In the embodiment, the installed capacity of the cogeneration power plant is 2×350MW, and the capacity of the electric heat storage device is set to 320MW according to the process requirements. According to the configuration scheme, a set of 50MW liquid electric heat storage device 4 is arranged, and four sets of solid electric heat storage devices 3 with capacities of 50MW, 85MW and 85MW are respectively arranged. If the peak regulation load of the power grid is changed within the range of not more than 50MW, the output power of the electrode hot water boiler is only required to be adjusted; when the peak load of the power grid is changed within the range of more than 50MW, one or more sets of solid electric heat storage devices 3 with total capacity not more than the peak load can be cut off selectively, and then the output power of the liquid electric heat storage device 4 is adjusted to meet the requirement of peak load change.
According to the electric heat storage device configuration system, a plurality of sets of solid electric heat storage devices 3 are configured to serve as peak shaving main bodies, and meanwhile, a set of liquid electric heat storage devices 4 with power ranges capable of being adjusted steplessly are configured to serve as supplementary means capable of being adjusted steplessly. Meanwhile, the solid and liquid electric heat storage device has the option of various voltage grades, so that various power supplies of the peak shaving equipment of the thermal power plant have various leading schemes, the construction conditions of the power plant are not excessively limited, and the peak shaving construction is facilitated by more fully utilizing the existing conditions.
Example 2
As shown in fig. 2, the electric heat storage device configuration system comprises a peak regulation system, a voltage transformation device and a power grid, wherein the peak regulation system is provided with a plurality of sets of solid electric heat storage devices 3 and a set of liquid electric heat storage devices 4, and the solid electric heat storage devices 3 and the liquid electric heat storage devices 4 are connected in parallel through the power grid.
In the embodiment, the whole power plant is taken as a whole, a high-power electrode water heater is selected as the liquid electric heat storage device 4, and the power supply voltages of the solid electric heat storage device 3 and the electrode water heater are all 20kV grades. An incoming line interval is newly added on an original 220kV bus 6 of a power plant, the incoming line interval is connected to a 20kV bus 8 after being regulated to 20kV through a 220/20kV step-down transformer 7, the power is supplied to an electric heat storage device, and the electric heat storage device is provided with 20kV bus switching equipment in a matching manner on site and is used as a normal start-stop control switch of the electric heat storage device. The 220kV newly increased line interval, the step-down transformer, the bus switching equipment and the electric heat storage device can be connected by adopting steel-cored aluminum stranded wires or cables according to specific engineering conditions.
In the embodiment, the installed capacity of the cogeneration power plant is 2×350MW, and the capacity of the electric heat storage device is set to 320MW according to the process requirements. According to the configuration scheme, a set of 50MW liquid electric heat storage device 4 is arranged, and four sets of solid electric heat storage devices 3 with capacities of 50MW, 85MW and 85MW are respectively arranged. If the peak regulation load of the power grid is changed within the range of not more than 50MW, the output power of the electrode hot water boiler is only required to be adjusted; when the peak load of the power grid is changed within the range of more than 50MW, one or more sets of solid electric heat storage devices 3 with total capacity not more than the peak load can be cut off selectively, and then the output power of the liquid electric heat storage device 4 is adjusted to meet the requirement of peak load change.
According to the electric heat storage device configuration system, a plurality of sets of solid electric heat storage devices 3 are configured to serve as peak shaving main bodies, and meanwhile, a set of liquid electric heat storage devices 4 with power ranges capable of being adjusted steplessly are configured to serve as supplementary means capable of being adjusted steplessly. Meanwhile, the solid and liquid electric heat storage device has the option of various voltage grades, so that various power supplies of the peak shaving equipment of the thermal power plant have various leading schemes, the construction conditions of the power plant are not excessively limited, and the peak shaving construction is facilitated by more fully utilizing the existing conditions.
Example 3
As shown in fig. 3, the electric heat storage device configuration system comprises a peak regulation system, a voltage transformation device and a power grid, wherein the peak regulation system is provided with a plurality of sets of solid electric heat storage devices 3 and a set of liquid electric heat storage devices 4, and the solid electric heat storage devices 3 and the liquid electric heat storage devices 4 are connected in parallel through the power grid.
In the embodiment, each unit is taken as a whole unit, the voltage of the electric heat storage device is 20kV level, and the 20kV bus 8 supplies power. The electric heat storage device is provided with 20kV bus switch equipment in a matching way on site and is used as a normal start-stop control switch of the electric heat storage device. The 20kV bus 8 total power supply can adopt a phase-separated bus and is directly connected to the outgoing 20kV main sealed bus of the generator 10 through an outlet breaker, current is output to a power plant power grid through a main transformer 9, and all feeder cabinets can be connected with an electric heat storage device through cables.
According to the electric heat storage device configuration system, a plurality of sets of solid electric heat storage devices 3 are configured to serve as peak shaving main bodies, and meanwhile, a set of liquid electric heat storage devices 4 with power ranges capable of being adjusted steplessly are configured to serve as supplementary means capable of being adjusted steplessly. Meanwhile, the solid and liquid electric heat storage device has the option of various voltage grades, so that various power supplies of the peak shaving equipment of the thermal power plant have various leading schemes, the construction conditions of the power plant are not excessively limited, and the peak shaving construction is facilitated by more fully utilizing the existing conditions.
Example 4
As shown in fig. 4, the electric heat storage device configuration system comprises a peak regulation system, a voltage transformation device and a power grid, wherein the peak regulation system is provided with a plurality of sets of solid electric heat storage devices 3, and two sets of liquid electric heat storage devices 4 are arranged at the same time, and the solid electric heat storage devices 3 and the liquid electric heat storage devices 4 are connected through the power grid.
In the embodiment, each unit is taken as a whole, a high-power electrode water heater is selected as the liquid electric heat storage device 4, the solid electric heat storage device is provided with a power supply voltage of 66kV level, and the voltage of the electrode water heater is 20kV level. The solid electric heat storage device of the whole plant is provided with 66kV GIS switch equipment on site in a matched manner to form a66 kV bus 2 section, and a power supply is taken from a power plant booster station bus through a 220/66kV step-down transformer 2; the 220kV bus 6, the step-down transformer, the 66kV GIS switch equipment and the solid electric heat storage device 3 can be connected by adopting steel-cored aluminum stranded wires or cables according to engineering specific conditions. One electrode water heater device power supply adopts a phase-separation bus and is directly connected with a20 kV main enclosed bus of a first outgoing line 13 of a first generator 12 through an outlet breaker T, and the other electrode water heater device power supply adopts the phase-separation bus and is connected with a20 kV main enclosed bus of a second outgoing line 14 of a second generator 11 through an outlet breaker T.
In the embodiment, two sets of 50MW electrode water heater devices are arranged, and four sets of solid electric heat storage devices 3 with capacities of 50MW, 70MW and 70MW are respectively arranged. If the peak regulation load of the power grid is changed within the range of not more than 100MW, only the output power of the two sets of electrode hot water boilers is required to be adjusted; when the peak shaving load of the power grid is changed within the range of more than 100MW, one or more sets of solid electric heat storage devices 3 with total capacity not more than the peak shaving capacity can be cut off selectively, and then the output power of one or two sets of liquid electric heat storage devices 4 is adjusted to meet the requirement of peak shaving load change.
According to the electric heat storage device configuration system, a plurality of sets of solid electric heat storage devices 3 are configured to serve as peak shaving main bodies, and a plurality of sets of liquid electric heat storage devices 4 with stepless adjustable power ranges are configured to serve as supplementary means capable of stepless adjustment. Meanwhile, the solid and liquid electric heat storage device has the option of various voltage grades, so that various power supplies of the peak shaving equipment of the thermal power plant have various leading schemes, the construction conditions of the power plant are not excessively limited, and the peak shaving construction is facilitated by more fully utilizing the existing conditions.
Example 5
The electric heat storage device arrangement system in this embodiment is the same as that of embodiment 2, except that a ramp-up soft starter 18 is provided as shown in fig. 5. The main constitution of the soft starter is a three-phase anti-parallel high-voltage thyristor connected in series between a power supply and an electric heat storage device and an electronic control circuit thereof. The soft starter is controlled to control the conduction angle of the internal thyristor, so that the input voltage of the electric heat storage device gradually rises from zero in a preset function relation until the starting is finished after the input voltage rises to the rated voltage. The impact of the electric heat storage device on the power grid is reduced through the step-by-step voltage regulation of the soft starter.
Example 6
The configuration system of the electric heat storage device in this embodiment is the same as that of embodiment 4, except that a series variable resistor step-down start mode is adopted as shown in fig. 6. A set of variable resistance starting cabinet is connected in series between the power supply and the solid electric heat storage device, and the variable resistance cabinet can be a thermal resistor or a liquid resistor. When the solid electric heat storage device is connected to a power grid, the resistance of the variable resistor is regulated steplessly and smoothly according to a preset resistance value until the starting is finished after the resistance value is close to 0, so that the input voltage of the solid electric heat storage device is increased continuously until the rated voltage is reached, and the impact of full-voltage starting on the power grid is avoided.
While the invention has been particularly shown and described with reference to a preferred embodiment thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as set forth in the appended claims. The foregoing description of specific embodiments of the invention has been presented in a particular context, but is not intended to be a limitation upon the invention. Any simple modification of the above embodiments according to the technical substance of the present invention still falls within the scope of the technical solution of the present invention.
Claims (8)
1. An electric heat storage device configuration system comprises a power grid, a voltage transformation device and a peak regulation system connected with the power grid, and is characterized in that,
The peak shaving system comprises a solid electric heat storage device (3) and a liquid electric heat storage device (4), wherein one or more solid electric heat storage devices (3) are connected with one or more liquid electric heat storage devices (4) in parallel; the liquid electric heat storage device (4) is a high-power electrode water heater;
When the solid electric heat storage device (3) and/or the liquid electric heat storage device (4) are started, the input voltage input to the solid electric heat storage device (3) and/or the liquid electric heat storage device (4) is ramped up to a predetermined voltage;
The liquid electric heat storage device and the solid electric heat storage device are connected to a peak shaving system bus which is connected to an outgoing line main enclosed bus of the generator (10) through an outlet breaker T;
The solid electric heat storage device (3) in the peak shaving system is used as a peak shaving main body, and the liquid electric heat storage device (4) in the peak shaving system is used as a supplementary means capable of being adjusted steplessly; the power of the liquid electric heat storage device (4) is steplessly adjusted within the range of 0% -100%; when the peak regulating load of the power grid is not more than the capacity of the plurality of liquid electric heat storage devices, the peak regulating system regulates the output power of one or more liquid electric heat storage devices; when the peak regulating load of the power grid is larger than the capacities of the liquid electric heat storage devices, the peak regulating system selectively cuts off the output power of one or more solid electric heat storage devices with total capacity not larger than the peak regulating load of the power grid, and then adjusts the output power of one or more liquid electric heat storage devices.
2. The electrical heat storage device configuration system of claim 1 wherein,
The peak shaving system is provided with a slope boosting soft starter (18), and the solid electric heat storage device (3) is connected to a power plant bus through the slope boosting soft starter (18).
3. The electrical heat storage device configuration system of claim 2 wherein,
The slope boosting soft starter (18) comprises a three-phase anti-parallel high-voltage thyristor and an electronic control circuit thereof, wherein the three-phase anti-parallel high-voltage thyristor is connected with the first bus (6) and the solid electric heat storage device (3) in series.
4. The electrical heat storage device configuration system of claim 1 wherein,
The peak shaving system is provided with a variable resistance starting cabinet, and the solid electric heat storage device (3) is connected to a power plant bus through the variable resistance starting cabinet connected in series.
5. The electrical heat storage device configuration system of claim 4 wherein,
When the solid electric heat storage device (3) is started, a variable resistance starting cabinet connected in series with the solid electric heat storage device (3) is adjusted to gradually reduce the resistance value of the variable resistance, so that the input voltage to the solid electric heat storage device (3) is gradually increased to a prescribed voltage.
6. The electrical heat storage device configuration system of claim 1 wherein,
The peak shaving system bus comprises an off-phase bus.
7. The electrical heat storage device configuration system according to any one of claims 1 to 6, wherein,
When the solid electric heat storage device (3) and the liquid electric heat storage device (4) are plural, the plural solid electric heat storage devices (3) are connected in parallel with each other, and the plural liquid electric heat storage devices (4) are connected in parallel with each other.
8. An electric heat storage device configuration system comprises a power grid, a transformation system and a peak shaving system connected with the power grid, and is characterized in that,
The peak shaving system comprises one or more solid electric heat storage devices (3) and one or more liquid electric heat storage devices (4) which are arranged in parallel, wherein the liquid electric heat storage devices (4) are high-power electrode water heater;
When the solid electric heat storage device (3) is started, adjusting a variable resistor connected in series with the solid electric heat storage device (3) to gradually reduce the resistance value of the variable resistor, thereby gradually increasing the input voltage to the solid electric heat storage device (3) to a rated voltage;
The liquid electric heat storage device (4) is directly connected to a 20kV main closed bus of a first outgoing line (13) of the first generator (12) in a T way through an outlet breaker by adopting a phase-separation bus;
The solid electric heat storage device is connected with a second bus (2) with a bus voltage lower than that of the first bus (6);
The solid electric heat storage device (3) in the peak shaving system is used as a peak shaving main body, and the liquid electric heat storage device (4) in the peak shaving system is used as a supplementary means capable of being adjusted steplessly; the power of the liquid electric heat storage device (4) is steplessly adjusted within the range of 0% -100%; when the peak regulating load of the power grid is not more than the capacity of the plurality of liquid electric heat storage devices, the peak regulating system regulates the output power of one or more liquid electric heat storage devices; when the peak regulating load of the power grid is larger than the capacities of the liquid electric heat storage devices, the peak regulating system selectively cuts off the output power of one or more solid electric heat storage devices with total capacity not larger than the peak regulating load of the power grid, and then adjusts the output power of one or more liquid electric heat storage devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911373136.6A CN110994627B (en) | 2016-12-16 | 2017-01-23 | Electric heat storage device configuration system |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611168117 | 2016-12-16 | ||
| CN2016111681176 | 2016-12-16 | ||
| CN201911373136.6A CN110994627B (en) | 2016-12-16 | 2017-01-23 | Electric heat storage device configuration system |
| CN201710058624.2A CN106786621B (en) | 2016-12-16 | 2017-01-23 | Electric heat storage device configuration system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710058624.2A Division CN106786621B (en) | 2016-12-16 | 2017-01-23 | Electric heat storage device configuration system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110994627A CN110994627A (en) | 2020-04-10 |
| CN110994627B true CN110994627B (en) | 2024-04-19 |
Family
ID=58942083
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911373136.6A Active CN110994627B (en) | 2016-12-16 | 2017-01-23 | Electric heat storage device configuration system |
| CN201710058624.2A Active CN106786621B (en) | 2016-12-16 | 2017-01-23 | Electric heat storage device configuration system |
| CN201720099844.5U Active CN206389118U (en) | 2016-12-16 | 2017-01-23 | A kind of electric heat-storage device configures system |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710058624.2A Active CN106786621B (en) | 2016-12-16 | 2017-01-23 | Electric heat storage device configuration system |
| CN201720099844.5U Active CN206389118U (en) | 2016-12-16 | 2017-01-23 | A kind of electric heat-storage device configures system |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN110994627B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994627B (en) * | 2016-12-16 | 2024-04-19 | 赫普能源环境科技股份有限公司 | Electric heat storage device configuration system |
| CN107816910B (en) * | 2017-10-18 | 2023-12-05 | 烟台卓越新能源科技股份有限公司 | Power plant depth comprehensive peak regulation system and peak regulation method |
| WO2019240667A1 (en) * | 2018-06-11 | 2019-12-19 | Sp Innovation Pte. Ltd. | Systems and method for hybrid energy storage |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064749A (en) * | 2011-01-11 | 2011-05-18 | 广州智光电气股份有限公司 | Motor soft startup device capable of giving consideration to reactive power compensation and control method thereof |
| CN201877841U (en) * | 2010-12-07 | 2011-06-22 | 沈阳世杰电器有限公司 | Low ebb electricity heat accumulation power generation system |
| CN203445625U (en) * | 2013-09-10 | 2014-02-19 | 瑞特爱（北京）能源科技有限公司 | Power grid impact load electric boiler peak-adjusting machine group |
| CN105605653A (en) * | 2016-01-26 | 2016-05-25 | 沈阳工业大学 | Three-stage adjustable heating power switching control method based on time-varying load |
| CN205451625U (en) * | 2015-09-30 | 2016-08-10 | 北京行学启源科技有限公司 | Motor drag a soft start control cabinet |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0998006B1 (en) * | 1998-10-27 | 2003-07-02 | CRENSO GmbH Creative Energy Solutions | Arrangement and method for adapting the power of an electric distribution network to temporary peak loads |
| GB0130530D0 (en) * | 2001-12-20 | 2002-02-06 | Bg Intellectual Pty Ltd | A domestic combined heat and power unit |
| CN105863758B (en) * | 2016-05-19 | 2017-09-08 | 华电电力科学研究院 | Heating system and intelligent control method for the double load peak regulations of cogeneration units |
| CN110994627B (en) * | 2016-12-16 | 2024-04-19 | 赫普能源环境科技股份有限公司 | Electric heat storage device configuration system |
-
2017
- 2017-01-23 CN CN201911373136.6A patent/CN110994627B/en active Active
- 2017-01-23 CN CN201710058624.2A patent/CN106786621B/en active Active
- 2017-01-23 CN CN201720099844.5U patent/CN206389118U/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201877841U (en) * | 2010-12-07 | 2011-06-22 | 沈阳世杰电器有限公司 | Low ebb electricity heat accumulation power generation system |
| CN102064749A (en) * | 2011-01-11 | 2011-05-18 | 广州智光电气股份有限公司 | Motor soft startup device capable of giving consideration to reactive power compensation and control method thereof |
| CN203445625U (en) * | 2013-09-10 | 2014-02-19 | 瑞特爱（北京）能源科技有限公司 | Power grid impact load electric boiler peak-adjusting machine group |
| CN205451625U (en) * | 2015-09-30 | 2016-08-10 | 北京行学启源科技有限公司 | Motor drag a soft start control cabinet |
| CN105605653A (en) * | 2016-01-26 | 2016-05-25 | 沈阳工业大学 | Three-stage adjustable heating power switching control method based on time-varying load |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106786621A (en) | 2017-05-31 |
| CN110994627A (en) | 2020-04-10 |
| CN106786621B (en) | 2024-04-19 |
| CN206389118U (en) | 2017-08-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8975862B2 (en) | Power supply apparatus | |
| Liu et al. | A hybrid AC/DC microgrid and its coordination control | |
| She et al. | On integration of solid-state transformer with zonal DC microgrid | |
| EP2220734B1 (en) | Electrical energy and distribution system | |
| CN110994627B (en) | Electric heat storage device configuration system | |
| Athab et al. | A transformerless DC–DC converter with large voltage ratio for MV DC grids | |
| CN102355042A (en) | Super-capacitor-based direct current power device of power station and power supply method thereof | |
| CN104201982A (en) | Photovoltaic system and controlling method thereof | |
| CN104252959A (en) | Energy-saving on-load capacity regulating transformer and intelligent high and low capacity switching method thereof | |
| JP2016201893A (en) | Interconnection system | |
| KR101626911B1 (en) | Power control system and method for plural energy storage devices | |
| GB2573903A (en) | Power supply apparatus and method | |
| EP3301775A1 (en) | A power converter system for power quality compensation and load balancing connected to an electric power distribution grid | |
| CN104104104A (en) | Method of automatic switching between power generation mode and SVG mode for photovoltaic inverter | |
| CN113555911B (en) | Central air conditioning power grid peak regulation system based on phase change material energy storage | |
| CN105281401A (en) | Novel storage battery charging and discharging system | |
| CN204809979U (en) | Automatic switch -over power supply's auxiliary power unit and photovoltaic grid -connected inverter thereof | |
| CN209767161U (en) | System for synchronously participating in deep peak regulation and frequency modulation of thermal power plant in multidimensional way by utilizing flywheel battery | |
| CN108306293B (en) | Low-voltage electric energy quality control device | |
| CN202634034U (en) | Busbar-shared energy-saving recovering type storage battery charging and discharging power circuit structure | |
| CN103303926B (en) | Application method of load power supply | |
| CN110854879A (en) | Be applied to electric wire netting frequency modulation device of photovoltaic direct current side | |
| CN104917195A (en) | Static synchronous series compensation device and control method thereof | |
| CN217956704U (en) | Light stores up microgrid system based on electric automobile | |
| EP3301800A1 (en) | A power converter system for connection to an electric power distribution grid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 100176 Beijing branch of Daxing District economic and Technological Development Zone thirteen Street No. 18 Building No. 12 hospital Applicant after: HEPP Energy Environment Technology Co.,Ltd. Address before: 100176 Beijing branch of Daxing District economic and Technological Development Zone thirteen Street No. 18 Building No. 12 hospital Applicant before: Hep Energy and Environment Technology Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |