CN105605653B - Based on when varying duty the adjustable heating power switching control method of three-level - Google Patents
Based on when varying duty the adjustable heating power switching control method of three-level Download PDFInfo
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- CN105605653B CN105605653B CN201610053611.1A CN201610053611A CN105605653B CN 105605653 B CN105605653 B CN 105605653B CN 201610053611 A CN201610053611 A CN 201610053611A CN 105605653 B CN105605653 B CN 105605653B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D13/00—Electric heating systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1096—Arrangement or mounting of control or safety devices for electric heating systems
Abstract
Based on when varying duty the adjustable heating power switching control method of three-level, the features such as this method is according to heat demand amount seasonal variety, it is proposed that three-level heats winding switching solid heat storage device electric loop design method：Switching is carried out to heating winding by star angle switching mode, realizes solid heat storage device 0.7P n /P n /1.4P n The switching of three kinds of different heating powers.It establishes different accumulation of heat power switch modes.Solve the problems, such as it is in the prior art it is existing when in demand change procedure solid heat storage device power be not easy to adjust.
Description
Technical field：The present invention relates to solid heat storage device electric loop design methods, and in particular to one kind being based on time-varying
The adjustable heating power switching control method of three-level of load, belongs to electric-heating technology field.
Background technology：With in world wide, economic rapid growth, the raising of living standards of the people, atmosphere pollution are increasingly tight
Weight, energy conservation and environmental protection reduce the significant development problem that energy consumption has become current urgent need solution.Power department is to solve electricity consumption injustice
Weighing apparatus problem formulates peak valley step price system.In this context, environment matter can be improved by promoting the use of solid electric heat-storage device
Amount alleviates power surges load pressure, improves power grid utilization ratio, reduces the power of power generation and equipment for power transmission and distribution, reduces heat supply
System loss, it is effectively energy saving, there is huge economic and social benefit.
Solid electric heating energy storage equipment is that a kind of Novel electric that is efficient, economic, energy saving, safe and reliable, reducing environmental pollution adds
Hot equipment.Using night dip electricity, by electrotransformation at thermal energy storage；In the heat release heating of peak of power consumption period, provide hot water.Fully
Using power grid valley power, increase electric power effective supply, reduce electricity cost, improve load rate of grid, stablizing for power grid is passed through
Ji operation is of great importance.
The advantage of solid electric heat-storage heating includes mainly：1, land utilization ratio is high, cost of investment is low, administration fee is low；2、
Convenience that temperature is adjustable, can meet the needs of different users；3, clean environment firendly, safety.Eliminate pollution that caused by coal burning and anthracemia
Trouble and worry；4, power grid utilization rate is high, peak load shifting, is conducive to clean energy resource consumption；5, residence heating can household metering, just
In energy saving etc..
But existing solid heat storage device heating power is certain, cannot carry out power tune according to user demand, season difference
Section only simply adjusts air outlet temperature.Since babinet is in instantaneous operating conditions, the damage of heating winding and gitter brick is easily led to
It is bad, increase maintenance cost.
Invention content：
Goal of the invention：Invention provide it is a kind of based on when varying duty the adjustable heating power switching control method of three-level, mesh
Be solve it is the problems of previous.
Technical solution：Invention is achieved through the following technical solutions：
Based on when varying duty the adjustable heating power switching control method of three-level, it is characterised in that：This method is according to heat supply
The features such as demand seasonal variety, it is proposed that three-level heats winding switching solid heat storage device electric loop design method：It is logical
It crosses star angle switching mode and switching is carried out to heating winding, realize solid heat storage device 0.7Pn/Pn/1.4PnThree kinds of differences are for hot merit
The switching of rate.
Heating winding is divided into six groups, is respectively designated as 1A, 1B, 1C, 2A, 2B, 2C, the structure phase of this six groups of heating windings
Together, and at 1A, 1B, 1C access power grid access three-phase linked switch KM1, at, 2A, 2B, 2C access power grid access three be connected
Three-phase linked switch KM3 is accessed at dynamic switch KM2, neutral point N, the switching for controlling heating winding, as closure KM1 and KM3
When, 1A, 1B, 1C, N constitute Y type connection status, and the power of solid heat storage device is 0.7P at this timen；When being closed KM2 and KM3,
2A, 2B, 2C, N constitute Y type connection status, and the power of solid heat storage device is still 0.7P at this timen；When being closed KM1 and KM2,
1A, 1B, 1C, 2A, 2B, 2C are in △ type connection status, and the power of solid heat storage device is P at this timen；When be closed KM1, KM2 and
When KM3,1A, 1B, 1C, 2A, 2B, 2C, N are in Y-Y type connection status, and the power of solid heat storage device is 1.4P at this timen。
The step of this method is included is as follows：
The first step, in low-valley interval, to solid heat storage device accumulation of heat；
Second step obtains solid heat storage device real time data information by information acquisition system, and detection unit needs user
The real time data and historical data for asking side are integrated with real time data in solid heat storage device, and this data is sent into microcontroller control
Unit；
Third walks, single chip control unit judge solid heat storage device whether switching, output order controls to driving unit
The closure of contactor and shutdown；
4th step, single chip control unit is by the switching power command of the solid heat storage device determined according to user demand amount
It send to triggering execution unit, the three-phase linked switch in power supply and solid heat storage device is series at by controller control；
5th step when inspection center detects that solid unit's amount of stored heat is unsatisfactory for user demand, is being cut in low power consumption
Disconnected solid heat storage device, directly carries out electric heating simultaneously, and switch board and main circuit unit directly control solid by controller and store
Thermal carries out heat storage, returns to the first step；In peak of power consumption, inspection center detects that solid unit's amount of stored heat is unsatisfactory for
When user demand, in cut-out solid heat storage device, electric heating is carried out, when waiting for low power consumption, returns to the first step.If solid heat storage
Device cannot meet user demand for a long time, can carry out dilatation in such a way that winding is heated in parallel connection at this time.
As demand≤0.7P of user in 4th stepn, control three-phase linked switch KM1 and KM3 closure, 1A, 1B, 1C tri-
Phase Y types link, if this branch breaks down, control three-phase linked switch KM2 and KM3 are closed, 2A, 2B, 2C three-phase Y type chains
It connects；Work as 0.7PnDemand≤P of ＜ usernWhen, control three-phase linked switch KM1 and KM2 are closed, 1A, 1B, 1C, 2A, 2B, 2C
Three-phase △ types link；Work as PnDemand≤1.4P of ＜ usernWhen, control three-phase ganged is opened KM1, KM2 and KM3 and is closed, 1A, 1B,
1C, 2A, 2B, 2C, N are in the connection of Y-Y types.
Accumulation of heat power is set and switches three load temperature node T1、T2And T3, and temperature T is set1≥T2≥T3, when load temperature
T is spent nominally less than minimum control heat, if there are T >=T at this time1, control three-phase linked switch KM1 and KM3 closure, accumulation of heat dress
It sets power and is switched to 0.7Pn, the link of 1A, 1B, 1C three-phase Y types meets burden requirement, if this branch breaks down, control three
Be connected switch KM2 and KM3 closure, the link of 2A, 2B, 2C three-phase Y types；If there are T1＞ T >=T2, control three-phase linked switch KM1
It is closed with KM2, regenerative apparatus power is switched to Pn, 1A, 1B, 1C, 2A, 2B, 2C three-phase △ types link, meet burden requirement；If
There are T2＞ T >=T3, control three-phase ganged and open KM1, KM2 and KM3 closure, thermal power is switched to 1.4Pn, 1A, 1B, 1C,
2A, 2B, 2C, N are in the connection of Y-Y types, meet burden requirement.
Variable power switching storage is put when based on the different heating winding switching solid heat storage devices with thermic load space temperature three-level
Hot-swap controls, and its steps is as follows：
The first step, in low-valley interval, to solid heat storage device accumulation of heat；
Second step, when the output power P ＞ plant areas demand power of power grid is PiIt is P that ＞, which is supplied to solid heat storage power,jWhen,
It controls three-phase linked switch KM1 and KM3 or control three-phase linked switch KM2 and KM3 is closed, regenerative apparatus power is switched to
0.7Pn, 1A, 1B, 1C three-phase or 2A, 2B, 2C three-phase Y types link, thermal storage time k1, the total regenerative capacity of heat storage is E1=
k1*0.7Pn；
Third walks, and is P when the output power P ＞ of power grid are supplied to solid heat storage powerj>=plant area demand power is PiWhen,
It controls three-phase linked switch KM1 and KM2 to be closed, regenerative apparatus power is switched to Pn, 1A, 1B, 1C, 2A, 2B, 2C three-phase △ type chains
It connects, thermal storage time k2, the total regenerative capacity of heat storage is E2=k2*Pn；
4th step, when the output power P=that the output power of power grid works as power grid is supplied to solid heat storage power for Pj, plant area
Demand power PiWhen=0, control three-phase linked switch KM1, KM2 and KM3 are closed, and thermal power is switched to 1.4Pn, 1A, 1B,
1C, 2A, 2B, 2C, N are in the connection of Y-Y types, thermal storage time k3, the total regenerative capacity of heat storage is E3=k3*1.4Pn；
5th step judges whether to meet ∑ ki≤ 8 (i=1,2,3), and E0=E1+E2+E3, if not satisfied, then returning to first
Step changes according to power grid distribution power, Variable power switching accumulation of heat switching control when progress；Heat-accumulating process terminates if meeting, etc.
It waits for that electricity consumption peak period arrives, carries out the accumulation of heat power switching control in different load temperature (supply space temperature) section；
6th step, when load temperature T is warm less than minimum control nominally, if there are T >=T at this time1, control three-phase ganged
Switch KM1 and KM3 are closed, and 1A, 1B, 1C three-phase Y types link, regenerative apparatus power are switched to 0.7Pn, meet burden requirement；If
When this branch breaks down, control three-phase linked switch KM2 and KM3 are closed, the link of 2A, 2B, 2C three-phase Y types, regenerative apparatus work(
Rate is still switched to 0.7Pn；
7th step, if there is T at this time1＞ T >=T2, control three-phase linked switch KM1 and KM2 be closed, 1A, 1B, 1C, 2A,
2B, 2C three-phase △ types link, and regenerative apparatus power is switched to Pn, meet burden requirement；
8th step, if there are T2＞ T >=T3, control three-phase ganged open KM1, KM2 and KM3 closure, 1A, 1B, 1C, 2A, 2B,
2C, N are in the connection of Y-Y types, and thermal power is switched to 1.4Pn, meet burden requirement；
9th step cannot meet the 6th step, the 7th step, if heat is to reach device heat content lower limit in solid unit
Eight step heat demands return to the first step, but when low power consumption, charge to solid heat storage device.
Advantageous effect：
The present invention propose it is a kind of based on when varying duty the adjustable heating power switching control method of three-level, establish different accumulation of heats
Power switch mode.Solve it is in the prior art it is existing when in demand change procedure solid heat storage device power be not easy to adjust
The problem of section.
Advantages of the present invention is as follows with good effect：
(1) the switching phase in the design of solid heat storage device three-level heating winding switching electric loop between each group heating winding
It is mutually independent, by star angle switching mode to heating winding switching, realize the switching of the different heating powers of three kinds of solid heat storage device.
When certain group heating winding breaks down, it can switch to other windings and work on, this mode does not influence user's heat demand, together
When reduce O＆M cost.
(2) according to the difference of user demand amount, different capacity switching is carried out to solid heat storage device, control regenerative apparatus goes out
The wind speed in air port heats, and the storage that can reduce equipment puts number, and system operation and maintenance cost are reduced to reach
Purpose.
Description of the drawings：
Fig. 1 is solid heat storage device three-level heating winding switching electric loop figure.
Fig. 2 is the control mode schematic diagram of solid heat storage device different capabilities switching.
Fig. 3 is the control flow chart of solid heat storage device different capabilities switching.
Fig. 4 is the accumulation of heat power switching control flow chart in different load temperature (supply space temperature) section.
Specific implementation mode：
Present invention is further described in detail below in conjunction with the accompanying drawings.
As shown in Fig. 1, the three-level that the present invention designs heats winding switching electric loop, and heating winding is divided into six groups,
It is respectively designated as 1A, 1B, 1C, 2A, 2B, 2C, the structure of this six groups of heating windings is identical, and is connect at 1A, 1B, 1C access power grid
Enter three-phase linked switch KM1,2A, 2B, 2C access power grid at access three-phase linked switch KM2, neutral point N place access three-phase
Linked switch KM3, the switching for controlling heating winding.When being closed KM1 and KM3,1A, 1B, 1C, N constitute Y types and connect shape
State, the power of solid heat storage device is 0.7P at this timen；When being closed KM2 and KM3,2A, 2B, 2C, N constitute Y type connection status,
The power of solid heat storage device is still 0.7P at this timen；When being closed KM1 and KM2,1A, 1B, 1C, 2A, 2B, 2C are in △ types company
State is connect, the power of solid heat storage device is P at this timen；When being closed KM1, KM2 and KM3, at 1A, 1B, 1C, 2A, 2B, 2C, N
In Y-Y type connection status, the power of solid heat storage device is 1.4P at this timen.If solid heat storage device cannot meet user for a long time
Demand can carry out dilatation in such a way that winding is heated in parallel connection at this time.Specific allocation plan is as shown in table 1.
1 different capabilities switching control of table configures
As shown in Fig. 2, the present invention proposes the control strategy of solid heat storage device different capabilities switching：Data acquisition unit
The running state parameter of acquisition solid heat storage device in real time, including the regenerator temperature of setting, heat storage real time temperature show, are super
Warm alarm setting value, heating for water outlet, the setting value of return water temperature and actual measured value, the flow of heating circulation water, heating load,
The power consumption etc. of solid electric heating energy storage equipment；This information is sent into detection unit, it is whole that detection unit will detect that data carry out
It closes, is sent into single chip control unit；Single chip control unit judge solid heat storage device whether switching, output order is single to driving
Member, the closure of control contactor and shutdown；Single chip control unit fills the solid heat storage determined according to user demand amount simultaneously
The switching power command set is sent to triggering execution unit, is controlled the three-phase ganged being series in power supply and solid heat storage device and is opened
It closes, implements the switching between Y- △ different capabilities；Switch board and main circuit unit directly control solid heat storage dress by controller
It sets and carries out heat storage.
A kind of control of three-level heating winding switching solid heat storage device different capabilities switching, as shown in figure 3, its steps
It is as follows：
The first step, in low-valley interval, to solid heat storage device accumulation of heat；
Second step, regenerator temperature, the heat storage that solid heat storage device setting is obtained by information acquisition system are warm in real time
It has been shown that, overtemperature alarm setting value, heating are spent for water outlet, the stream of the setting value of return water temperature and actual measured value, heating circulation water
Amount, heating load, the information such as power consumption of solid electric heating energy storage equipment.Detection unit is by the real time data and history of user demand side
Data are integrated with real time data in solid heat storage device, and this data is sent into single chip control unit；
Third walks, single chip control unit judge solid heat storage device whether switching, output order controls to driving unit
The closure of contactor and shutdown；
4th step, single chip control unit is by the switching power command of the solid heat storage device determined according to user demand amount
It send to triggering execution unit, the three-phase linked switch in power supply and solid heat storage device is series at by controller control.When with
Demand≤the 0.7P at familyn, control three-phase linked switch KM1 and KM3 closure, 1A, 1B, 1C three-phase Y types link, if this branch goes out
When existing failure, control three-phase linked switch KM2 and KM3 are closed, the link of 2A, 2B, 2C three-phase Y types；Work as 0.7PnThe demand of ＜ user
Amount≤PnWhen, control three-phase linked switch KM1 and KM2 are closed, the link of 1A, 1B, 1C, 2A, 2B, 2C three-phase △ types；Work as Pn＜ user
Demand≤1.4PnWhen, control three-phase ganged opens KM1, KM2 and KM3 closure, and 1A, 1B, 1C, 2A, 2B, 2C, N are in Y-Y types
Connection.
5th step when inspection center detects that solid unit's amount of stored heat is unsatisfactory for user demand, is being cut in low power consumption
Disconnected solid heat storage device, directly carries out electric heating simultaneously, and switch board and main circuit unit directly control solid by controller and store
Thermal carries out heat storage, returns to the first step；In peak of power consumption, inspection center detects that solid unit's amount of stored heat is unsatisfactory for
When user demand, in cut-out solid heat storage device, electric heating is carried out, when waiting for low power consumption, returns to the first step.
Power grid distribution power is real-time change, Variable power switching heat storage type when the present invention proposes a kind of when due to paddy.
In low-valley interval, when plant area's electric power is relatively high, solid heat storage stove distributes accumulation of heat available power and reduces；When plant area's electricity consumption
When power is relatively low, solid heat storage stove distributes accumulation of heat available power and increases；When plant area's electric power is 0, power grid distributes work(
Rate is all for accumulation of heat.
Low-valley interval, if the output power of power grid is P, plant area's demand power is Pi, it is P to be supplied to solid heat storage powerj,
Pi、PjReal-time change, P=Pi+Pj, thermal storage time is 8 hours, kiFor the charging time, and meet ∑ ki≤ 8 (i=1,2,
3), the total regenerative capacity of heat storage is E0, E0For solid heat storage design capacity.
E0=k1*0.7Pn+k2*Pn+k3*1.4Pn (1)
As P ＞ Pi＞ Pj；E1=k1*0.7Pn (2)
Work as Pi≤Pj＜ P；E2=k2*Pn (3)
Work as Pi=0, Pj=P；E3=k3*1.4Pn (4)
And meet
E0=E1+E2+E3 (5)
Due to being inconsistent with thermic load space temperature, the present invention proposes a kind of different load temperature (supply space
Temperature) section accumulation of heat power method for handover control：
Accumulation of heat power is set and switches three load temperature node T1、T2And T3, and temperature T is set1≥T2≥T3, when load temperature
T is spent nominally less than minimum control heat, if there are T >=T at this time1, control three-phase linked switch KM1 and KM3 closure, accumulation of heat dress
It sets power and is switched to 0.7Pn, the link of 1A, 1B, 1C three-phase Y types meets burden requirement, if this branch breaks down, control three
Be connected switch KM2 and KM3 closure, the link of 2A, 2B, 2C three-phase Y types；If there are T1＞ T >=T2, control three-phase linked switch KM1
It is closed with KM2, regenerative apparatus power is switched to Pn, 1A, 1B, 1C, 2A, 2B, 2C three-phase △ types link, meet burden requirement；If
There are T2＞ T >=T3, control three-phase ganged and open KM1, KM2 and KM3 closure, thermal power is switched to 1.4Pn, 1A, 1B, 1C,
2A, 2B, 2C, N are in the connection of Y-Y types, meet burden requirement.Different temperatures load capacity switching control configuration is as shown in table 2.
2 different temperatures load capacity switching control of table configures
It is a kind of that the switching control method of the adjustable heating power of three-level of load can be used based on time-varying, as shown in figure 4, its step
It is rapid as follows：
The first step, in low-valley interval, to solid heat storage device accumulation of heat；
Second step, when the output power P ＞ plant areas demand power of power grid is PiIt is P that ＞, which is supplied to solid heat storage power,jWhen,
It controls three-phase linked switch KM1 and KM3 (or control three-phase linked switch KM2 and KM3) to be closed, regenerative apparatus power is switched to
0.7Pn, the link of 1A, 1B, 1C three-phase (or 2A, 2B, 2C three-phase) Y types, thermal storage time k1, the total regenerative capacity of heat storage is E1
=k1*0.7Pn；
Third walks, and is P when the output power P ＞ of power grid are supplied to solid heat storage powerj>=plant area demand power is PiWhen,
It controls three-phase linked switch KM1 and KM2 to be closed, regenerative apparatus power is switched to Pn, 1A, 1B, 1C, 2A, 2B, 2C three-phase △ type chains
It connects, thermal storage time k2, the total regenerative capacity of heat storage is E2=k2*Pn；
4th step, when the output power P=that the output power of power grid works as power grid is supplied to solid heat storage power for Pj, plant area
Demand power PiWhen=0, control three-phase linked switch KM1, KM2 and KM3 are closed, and thermal power is switched to 1.4Pn, 1A, 1B,
1C, 2A, 2B, 2C, N are in the connection of Y-Y types, thermal storage time k3, the total regenerative capacity of heat storage is E3=k3*1.4Pn；
5th step judges whether to meet ∑ ki≤ 8 (i=1,2,3), and E0=E1+E2+E3, if not satisfied, then returning to first
Step changes according to power grid distribution power, Variable power switching accumulation of heat switching control when progress；Heat-accumulating process terminates if meeting, etc.
It waits for that electricity consumption peak period arrives, carries out the accumulation of heat power switching control in different load temperature (supply space temperature) section；
6th step, when load temperature T is warm less than minimum control nominally, if there are T >=T at this time1, control three-phase ganged
Switch KM1 and KM3 are closed, and 1A, 1B, 1C three-phase Y types link, regenerative apparatus power are switched to 0.7Pn, meet burden requirement；If
When this branch breaks down, control three-phase linked switch KM2 and KM3 are closed, the link of 2A, 2B, 2C three-phase Y types, regenerative apparatus work(
Rate is still switched to 0.7Pn；
7th step, if there is T at this time1＞ T >=T2, control three-phase linked switch KM1 and KM2 be closed, 1A, 1B, 1C, 2A,
2B, 2C three-phase △ types link, and regenerative apparatus power is switched to Pn, meet burden requirement；
8th step, if there are T2＞ T >=T3, control three-phase ganged open KM1, KM2 and KM3 closure, 1A, 1B, 1C, 2A, 2B,
2C, N are in the connection of Y-Y types, and thermal power is switched to 1.4Pn, meet burden requirement；
9th step cannot meet the 6th step, the 7th step, if heat is to reach device heat content lower limit in solid unit
Eight step heat demands return to the first step, but when low power consumption, charge to solid heat storage device.
Claims (5)
1. based on when varying duty the adjustable heating power switching control method of three-level, it is characterised in that：This method is according to heat supply need
The amount of asking seasonal variety feature, it is proposed that three-level heats winding switching solid heat storage device electric loop design method：Pass through star
Angle switching mode carries out switching to heating winding, realizes solid heat storage device 0.7Pn/Pn/1.4PnThree kinds of different heating powers
Switching；
Heating winding is divided into six groups, is respectively designated as 1A, 1B, 1C, 2A, 2B, 2C, the structure of this six groups of heating windings is identical,
And 1A, 1B, 1C access power grid at access three-phase linked switch KM1,2A, 2B, 2C access power grid at access three-phase ganged open
KM2 is closed, three-phase linked switch KM3 is accessed at neutral point N, the switching for controlling heating winding, when being closed KM1 and KM3,
1A, 1B, 1C, N constitute Y type connection status, and the power of solid heat storage device is 0.7P at this timen；When being closed KM2 and KM3,2A,
2B, 2C, N constitute Y type connection status, and the power of solid heat storage device is still 0.7P at this timen；When being closed KM1 and KM2,1A,
1B, 1C, 2A, 2B, 2C are in △ type connection status, and the power of solid heat storage device is P at this timen；As closure KM1, KM2 and KM3
When, 1A, 1B, 1C, 2A, 2B, 2C, N are in Y-Y type connection status, and the power of solid heat storage device is 1.4P at this timen。
2. it is according to claim 1 based on when varying duty the adjustable heating power switching control method of three-level, feature exists
In：The step of this method is included is as follows：
The first step, in low-valley interval, to solid heat storage device accumulation of heat；
Second step obtains solid heat storage device real time data information by information acquisition system, and detection unit is by user demand side
Real time data and historical data and solid heat storage device in real time data integrate, and it is single that this data is sent into microcontroller control
Member；
Third walks, single chip control unit judge solid heat storage device whether switching, to driving unit, control contacts for output order
The closure of device and shutdown；
4th step, single chip control unit by the switching power command of the solid heat storage device determined according to user demand amount send to
Execution unit is triggered, the three-phase linked switch in power supply and solid heat storage device is series at by controller control；
5th step, it is solid in cut-out when inspection center detects that solid unit's amount of stored heat is unsatisfactory for user demand in low power consumption
Body regenerative apparatus directly carries out electric heating simultaneously, and switch board and main circuit unit directly control solid heat storage dress by controller
It sets and carries out heat storage, return to the first step；In peak of power consumption, inspection center detects that solid unit's amount of stored heat is unsatisfactory for user
When demand, in cut-out solid heat storage device, electric heating is carried out, when waiting for low power consumption, returns to the first step；If solid heat storage device
User demand cannot be met for a long time, can carry out dilatation in such a way that winding is heated in parallel connection at this time.
3. it is according to claim 2 based on when varying duty the adjustable heating power switching control method of three-level, feature exists
In：As demand≤0.7P of user in 4th stepn, control three-phase linked switch KM1 and KM3 closure, 1A, 1B, 1C three-phase Y types
Connection, if this branch breaks down, control three-phase linked switch KM2 and KM3 are closed, the connection of 2A, 2B, 2C three-phase Y types；When
0.7PnDemand≤P of ＜ usernWhen, control three-phase linked switch KM1 and KM2 are closed, 1A, 1B, 1C, 2A, 2B, 2C three-phase △
Type connects；Work as PnDemand≤1.4P of ＜ usernWhen, control three-phase ganged open KM1, KM2 and KM3 closure, 1A, 1B, 1C, 2A,
2B, 2C, N are in the connection of Y-Y types.
4. it is according to claim 2 based on when varying duty the adjustable heating power switching control method of three-level, feature exists
In：Accumulation of heat power is set and switches three load temperature node T1、T2And T3, and temperature T is set1≥T2≥T3, when load temperature T is low
Nominally in minimum control heat, if there are T >=T at this time1, control three-phase linked switch KM1 and KM3 closure, regenerative apparatus work(
Rate is switched to 0.7Pn, the connection of 1A, 1B, 1C three-phase Y types meets burden requirement, if this branch breaks down, controls three and is connected
Dynamic switch KM2 and KM3 are closed, the connection of 2A, 2B, 2C three-phase Y types；If there are T1＞ T >=T2, control three-phase linked switch KM1 and
KM2 is closed, and regenerative apparatus power is switched to Pn, 1A, 1B, 1C, 2A, 2B, 2C three-phase △ types connection, meet burden requirement；If depositing
In T2＞ T >=T3, control three-phase ganged and open KM1, KM2 and KM3 closure, thermal power is switched to 1.4Pn, 1A, 1B, 1C, 2A,
2B, 2C, N are in the connection of Y-Y types, meet burden requirement.
5. it is according to claim 4 based on when varying duty the adjustable heating power switching control method of three-level, feature exists
In：Variable power switching stores heat release switching when based on the different heating winding switching solid heat storage devices with thermic load space temperature three-level
Control, its steps are as follows：
The first step, in low-valley interval, to solid heat storage device accumulation of heat；
Second step, when the output power P ＞ plant areas demand power of power grid is PiIt is P that ＞, which is supplied to solid heat storage power,jWhen, control
Three-phase linked switch KM1 and KM3 or control three-phase linked switch KM2 and KM3 are closed, and regenerative apparatus power is switched to 0.7Pn,
1A, 1B, 1C three-phase or the connection of 2A, 2B, 2C three-phase Y types, thermal storage time k1, the total regenerative capacity of heat storage is E1=k1*
0.7Pn；
Third walks, and is P when the output power P ＞ of power grid are supplied to solid heat storage powerj>=plant area demand power is PiWhen, control
Three-phase linked switch KM1 and KM2 are closed, and regenerative apparatus power is switched to Pn, the connection of 1A, 1B, 1C, 2A, 2B, 2C three-phase △ types,
Thermal storage time is k2, the total regenerative capacity of heat storage is E2=k2*Pn；
4th step, when the output power P=that the output power of power grid works as power grid is supplied to solid heat storage power for Pj, plant area's demand
Power PiWhen=0, control three-phase linked switch KM1, KM2 and KM3 are closed, and thermal power is switched to 1.4Pn, 1A, 1B, 1C,
2A, 2B, 2C, N are in the connection of Y-Y types, thermal storage time k3, the total regenerative capacity of heat storage is E3=k3*1.4Pn；
5th step judges whether to meet ∑ ki≤ 8 (i=1,2,3), and E0=E1+E2+E3, if not satisfied, the first step is then returned,
Changed according to power grid distribution power, Variable power switching accumulation of heat switching control when progress；Heat-accumulating process terminates if meeting, and waits for use
Electric peak period arrives, and carries out the accumulation of heat power switching control of different load temperature range；
6th step, when load temperature T is warm less than minimum control nominally, if there are T >=T at this time1, control three-phase linked switch
KM1 and KM3 is closed, and 1A, 1B, 1C three-phase Y types connection, regenerative apparatus power are switched to 0.7Pn, meet burden requirement；If this is propped up
When road is broken down, control three-phase linked switch KM2 and KM3 are closed, and the connection of 2A, 2B, 2C three-phase Y types, regenerative apparatus power is still
It is switched to 0.7Pn；
7th step, if there is T at this time1＞ T >=T2, control three-phase linked switch KM1 and KM2 closure, 1A, 1B, 1C, 2A, 2B, 2C
Three-phase △ types connect, and regenerative apparatus power is switched to Pn, meet burden requirement；
8th step, if there are T2＞ T >=T3, control three-phase ganged and open KM1, KM2 and KM3 closure, 1A, 1B, 1C, 2A, 2B, 2C, N
It is connected in Y-Y types, thermal power is switched to 1.4Pn, meet burden requirement；
9th step cannot meet the 6th step, the 7th step, the 8th step if heat is to reach device heat content lower limit in solid unit
Heat demand returns to the first step, but when low power consumption, charges to solid heat storage device.
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