CN108375059A - Peak regulation control method of high-voltage electrode boiler system - Google Patents
Peak regulation control method of high-voltage electrode boiler system Download PDFInfo
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- CN108375059A CN108375059A CN201810040188.0A CN201810040188A CN108375059A CN 108375059 A CN108375059 A CN 108375059A CN 201810040188 A CN201810040188 A CN 201810040188A CN 108375059 A CN108375059 A CN 108375059A
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- heat
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- accumulator tank
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
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- Combustion & Propulsion (AREA)
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a peak regulation control method of a high-voltage electrode boiler system, which is characterized in that when a start instruction and peak regulation power given by a DCS are received, if a fault of the boiler is found, the fault is reported to the DCS, meanwhile, the power of the fault boiler is subtracted from the total power of a heat supply network, and the electric boiler is ready to start. Monitoring the peak load change given by the DCS at any time after the boiler is started, and distributing power again if the peak load change occurs; if there is no change, the electric boiler is operated according to the original allocation amount. And meanwhile, a command of whether the heat storage tank needs heat storage or not is received at any time, and a DCS balance heat supply network is matched. And when receiving the peak shaving stopping instruction, the electric boiler stops operating according to the set stopping step, and simultaneously receives a control command of the heat storage tank at any time for heat supply network coupling when the electric boiler stops operating. The invention balances the short-time imbalance of the heat release of the electric boiler system and the heat utilization of the heat supply network through the heat storage tank so as to achieve the purposes of flexible operation and better participation in deep peak shaving.
Description
Technical field
The present invention relates to a kind of power distribution method of high-field electrode boiler system more particularly to a kind of peak load regulation network heat supplies
The power distribution method of multigroup high-field electrode boiler system in system.
Background technology
The transformation main technological route of thermal power plant unit flexibility at present mainly has steam turbine steam extraction accumulation of heat renovation technique and using electricity
The technologies such as heat storage boiler peak regulation.Electric heat storage boiler peak regulation prior art route mainly has heat accumulating type electrode boiler and lava heat accumulation dress
It sets.Heat accumulating type electrode boiler is mainly by the way of solid heat storage.It uses high pressure solid heat storage technology, is sent out by high-voltage electricity
The compositions such as hot body, high temperature storage body, high-temperature heat exchanger, thermal output controller, high-temperature-resistant thermal-insulation shell and automatic control system.
Solid heat accumulation electric boiler needs to configure the hold over system of large capacity, therefore its floor space is very big and cost is higher.Solid stores
The application period of hot type electric boiler is shorter, and efficiency and reliability still needs further to calculate and observe.Lava electrical heat-storing device
Also almost there is a problem of same, and cost higher, reliability are lower.The two peak-shaving capability is deposited due to itself intrinsic
In the possibility for the peak regulation quality requirements that often cannot be satisfied electric dispatching department, and there are whole efficiencies after system longtime running
Decline, the solid heat storage material unfavorable problem such as not environmentally.
High-field electrode formula boiler generally uses demineralized water as internal recirculated water, the conductivity of demineralized water（At 25 DEG C）Generally
For 0.3 μ s/cm of ＜, which belongs to non-conductor（The resistive of water is close to infinity at this time）, can be understood as electrode at this time
Between be not turned on, therefore electrode boiler is in and does not do work state.Electrolysis water progress heat supply, boiler are heated to make boiler normally do work
Certain electrolyte is inside must be added to, makes recirculated water in stove that there is rational resistance, can just make its conduction.
High-field electrode formula hot-water boiler technology is mainly used in civil heating heat supply in foreign countries.Pass through high-voltage electricity by control
Electric energy 99% is converted to heat by the electric current of pole.Voltage uses 6-35kV.Load regulation range is 1 ~ 100%.Due to being to utilize water
Resistive directly water is heated, high-voltage electricity directly heats the boiler internal electrolyte circulation water as resistance,
There is no energy conversions to lose, and electric energy 100% is converted to heat, substantially without heat loss.When boiler water shortage, between electrode mutually
It is independent, it is cut off by the current channel that electrolyte water is connected.The phenomenon that being burnt out like that because of water shortage there is no similar conventional boiler.
Do not have among high-field electrode formula boiler is used peak load regulation network heat supply, how to be distributed in peak load regulation network heating system multigroup high
Piezoelectricity pole boiler power can respond peak regulation order within the shortest time and reach setting target, also be related to peak regulation fortune
Capable efficiency and effect.
Invention content
Goal of the invention：Present invention aims in view of the deficiencies of the prior art, provide one kind to ring in the shortest time
Peak regulation order is answered to reach the peak regulation control method of the high-field electrode boiler system of peak regulation target.
Technical solution：The peak regulation control method of high-field electrode boiler system of the present invention, includes the following steps：
（One）, high-field electrode boiler startup：
（1）DCS detects the return water temperature of thermoelectricity unit, calculates the heat that heat supply network needs, after reporting to control system of power plant, power plant
Electrode boiler load is distributed according to DCS instructions and heating network operation situation, high-field electrode boiler system receives the given startups of DCS and refers to
It enables and peak regulation power；
（2）Fault detect is carried out to boiler, it is such as faulty, it is reported to control system of power plant and subtracts failure in peak regulation power simultaneously
The power of boiler；
（3）Start after the power being assigned to is distributed to electrode boiler according to the priority level of setting；
（4）Hot water is incorporated to heat supply network after boiler startup, detects whether to receive heat-accumulator tank accumulation of heat order, decouples for heat supply network, does not connect
Receive order not accumulation of heat；Order is received to enter step（5）；
（5）Whether full detect heat-accumulator tank, "Yes" notifies that DCS heat-accumulator tanks are full, "No" heat-accumulator tank accumulation of heat；
（6）Detect whether that receiving heat-accumulator tank stops accumulation of heat order, "Yes" stops accumulation of heat, "No" return to step（5）It is recycled；
（Two）, high-field electrode boiler operatiopn：
（1）Peak regulation changed power given dynamic monitoring DCS runs electrode pot if do not changed according to original allocation
Stove compared with former power, is more than former power and executes the power after increasing, subtract less than the execution of former power when peak regulation changed power
Power after few；
（2）It detects whether to receive heat-accumulator tank accumulation of heat or heat release order, cooperation DCS balances heat supply network：
The heat-accumulator tank accumulation of heat when receiving accumulation of heat instruction, while detecting whether heat-accumulator tank has stored completely, if having stored full but having gone back
When being not received by stopping accumulation of heat instruction, notice DCS heat-accumulator tanks can not completely continue accumulation of heat；Continue to store if heat-accumulator tank is discontented
Heat stops accumulation of heat instruction until receiving, and heat-accumulator tank stops accumulation of heat；
The heat-accumulator tank heat release when receiving heat release instruction, while whether detect heat-accumulator tank empty, if accumulation of heat ullage and do not connect
When receiving stopping heat release instruction, sky can not continue heat release to notice DCS heat-accumulator tanks；Continue if heat-accumulator tank is not empty heat release until
It receives and stops heat release instruction, heat-accumulator tank stops heat release；
（Three）, high-field electrode boiler stop：
（1）It receives and stops peak regulation instruction electrode boiler according to setting outage stopping electrode boiler operation；
（2）It detects whether to receive heat-accumulator tank accumulation of heat order, for heat supply network coupling of electrode boiler when out of service：
The heat-accumulator tank accumulation of heat when receiving accumulation of heat instruction, while detecting whether heat-accumulator tank has stored completely, if having stored full but having gone back
When being not received by stopping accumulation of heat instruction, notice DCS heat-accumulator tanks can not completely continue accumulation of heat；Continue to store if heat-accumulator tank is discontented
Heat stops accumulation of heat instruction until receiving, and heat-accumulator tank stops accumulation of heat.
Several groups electric boiler and at least one set have been set before high-field electrode boiler startup in high-field electrode boiler system
Heat-accumulator tank, and set the priority level of each group electric boiler.
In order to consume the power being assigned to is very stable, every group of electrode boiler is separately provided with PID controller, point
Not carry out power and return water temperature adjust, leaving water temperature is pre- police as boiler safety.
After receiving the power for distributing to heat supply network, the PLC of the heat supply network begins to the electric boiler distribution power for heat supply network.Point
Principle with power is：The high electrode boiler of priority is distributed power at full capacity to start；Dump power distributes to next stage
Other boiler operatiopn, and so on；When dump power is less than the minimum operation power of minimum rank boiler, from high level-one boiler
A part of power is allocated in power needs boiler to be started to meet minimum operation power to minimum level-one；When dump power is higher than most
When the minimum operation power of low rank boiler, minimum level-one boiler directly initiates.This ensures that electric boiler is all to be permitted
Normal operation in the range of power can be run.
Preferably, the boiler of each priority level is switched in the defined time, and every electric boiler is allowed to have operation
Chance.
When certain boiler breaks down, stop the operation of the boiler while starting the low other boiler of level-one entering operation.
Advantageous effect：（1）Peak regulation control method of the present invention combines multigroup high-field electrode boiler system and participates in peak load regulation network, closes
Reason allotment power, response is rapid, peak regulation order can be responded within the shortest time and reach setting target, peaking operation
Efficient and effect is good；（2）The present invention balances electricity by combining high-field electrode boiler system and heat-accumulator tank peak regulation, by heat-accumulator tank
Boiler system heat release is uneven in short-term with heat supply network heat, to reach flexibility operation and preferably participate in the mesh of depth peak regulation
's；（3）The method of the present invention controls high-field electrode boiler startup, operation and method of shutting down, and high-field electrode boiler is made to meet
The requirement of depth peak regulation.
Description of the drawings
Fig. 1 is the flow chart that 1 mesohigh electrode boiler of the embodiment of the present invention starts；
Fig. 2 is the flow chart of 1 mesohigh electrode boiler of embodiment of the present invention operation；
Fig. 3 is the flow chart that 1 mesohigh electrode boiler of the embodiment of the present invention stops.
Specific implementation mode
Technical solution of the present invention is described in detail below by attached drawing, but protection scope of the present invention is not limited to
The embodiment.
Embodiment 1：The electric boiler and a hot water heat accumulation of 10 40MW have been used in certain high-pressure power plant electrode boiler system
The small-sized hold over system that power system capacity is about 196MWh.This 10 boilers distribute to www.swww.com.cn user 3, northern network users 5, southern net
User 2, and the limited level of electric boiler is configured.Hold over system is warm with heat supply network to balance the heat release of grill pan furnace system
It is uneven in short-term, to achieve the purpose that flexibility operation and preferably participate in depth peak regulation.
Every group of electrode boiler is separately provided with PID controller, carries out power respectively and return water temperature is adjusted, leaving water temperature is made
It is pre- police for boiler safety.
In order to preferably make electric boiler play a role in depth peak regulation, the tune for the high-field electrode boiler system that we use
Peak control method is as follows：
（One）, high-field electrode boiler startup：
As shown in Figure 1, when receiving the given enabled instructions of DCS and peak regulation power, first self-test is if it find that there is boiler to have event
Barrier is reported to DCS while subtracting the power of failure boiler in heat supply network general power, and electric boiler is carried out startup and prepared.Www.swww.com.cn, south
The electric boiler load that net, north are netted is instructed by power plant according to DCS and heating network operation situation is distributed.Each heat supply network is according to the work(being assigned to
Rate and startup priority starting trouble.Consider that the minimum load of boiler ensures the normal operation of boiler simultaneously in distribution power.
The priority level distribution method set as：The high electrode boiler of priority is distributed power at full capacity to start；Dump power point
The lower rank boiler operatiopn of dispensing, and so on；When dump power is less than the minimum operation power of minimum rank boiler, from
A part of power is allocated in high level-one boiler power needs boiler to be started to meet minimum operation power to minimum level-one；Work as residue
When power is higher than the minimum operation power of minimum rank boiler, minimum level-one boiler directly initiates.
Hot water is incorporated to after heat supply network there are one the process decoupled after boiler startup, at this time arrives heat storage extra in pipe network
In heat-accumulator tank.When receive require heat-accumulator tank accumulation of heat to say the word after execute heat storage can accumulation of heat operation, when receive heat storage can store
Heat stops accumulation of heat after terminating order.
（Two）, high-field electrode boiler operatiopn：
As shown in Fig. 2, needing to monitor the Peak Load variation that DCS is given at any time after boiler startup, if there is a change
Sub-distribution once power again：When peak regulation changed power, compared with former power, it is more than former power and executes the power after increasing, it is small
The power after reducing is executed in former power；If do not changed electric boiler is run according to original allocation.It simultaneously also will be at any time
Receive whether heat-accumulator tank needs accumulation of heat or exothermic order, cooperation DCS to balance heat supply network.
The heat-accumulator tank accumulation of heat when receiving accumulation of heat instruction, while detecting whether heat-accumulator tank has stored completely, if stored full
When but without receiving stopping accumulation of heat instruction, notice DCS heat-accumulator tanks can not completely continue accumulation of heat；If heat-accumulator tank is discontented after
Continuous accumulation of heat stops accumulation of heat instruction until receiving, and heat-accumulator tank stops accumulation of heat；
The heat-accumulator tank heat release when receiving heat release instruction, while whether detect heat-accumulator tank empty, if accumulation of heat ullage and do not connect
When receiving stopping heat release instruction, sky can not continue heat release to notice DCS heat-accumulator tanks；Continue if heat-accumulator tank is not empty heat release until
It receives and stops heat release instruction, heat-accumulator tank stops heat release；
（Three）, high-field electrode boiler stop：
As shown in figure 3, stopping peak regulation instruction electrode boiler according to setting outage stopping electrode boiler operation when receiving；
It detects whether to receive heat-accumulator tank accumulation of heat order at any time simultaneously, for heat supply network coupling of electrode boiler when out of service：
The heat-accumulator tank accumulation of heat when receiving accumulation of heat instruction, while detecting whether heat-accumulator tank has stored completely, if having stored full but having gone back
When being not received by stopping accumulation of heat instruction, notice DCS heat-accumulator tanks can not completely continue accumulation of heat；Continue to store if heat-accumulator tank is discontented
Heat stops accumulation of heat instruction until receiving, and heat-accumulator tank stops accumulation of heat.
As described above, although the present invention has been indicated and described with reference to specific preferred embodiment, must not explain
For the limitation to invention itself.It without prejudice to the spirit and scope of the invention as defined in the appended claims, can be right
Various changes can be made in the form and details for it.
Claims (7)
1. a kind of peak regulation control method of high-field electrode boiler system, it is characterised in that include the following steps：
（One）, high-field electrode boiler startup：
（1）Power plant distributes electrode boiler load according to DCS instructions and heating network operation situation, and high-field electrode boiler system receives DCS
Given enabled instruction and peak regulation power；
（2）Fault detect is carried out to boiler, it is such as faulty, it is reported to control system of power plant and subtracts failure in peak regulation power simultaneously
The power of boiler；
（3）Start after the power being assigned to is distributed to electrode boiler according to the priority level of setting；
（4）Hot water is incorporated to heat supply network after boiler startup, detects whether to receive heat-accumulator tank accumulation of heat order, decouples for heat supply network, does not connect
Receive order not accumulation of heat；Order is received to enter step（5）；
（5）Whether full detect heat-accumulator tank, "Yes" notifies that DCS heat-accumulator tanks are full, "No" heat-accumulator tank accumulation of heat；
（6）Detect whether that receiving heat-accumulator tank stops accumulation of heat order, "Yes" stops accumulation of heat, "No" return to step（5）It is recycled；
（Two）, high-field electrode boiler operatiopn：
（1）Peak regulation changed power given dynamic monitoring DCS runs electrode pot if do not changed according to original allocation
Stove compared with former power, is more than former power and executes the power after increasing, subtract less than the execution of former power when peak regulation changed power
Power after few；
（2）It detects whether to receive heat-accumulator tank accumulation of heat or heat release order, cooperation DCS balances heat supply network：
The heat-accumulator tank accumulation of heat when receiving accumulation of heat instruction, while detecting whether heat-accumulator tank has stored completely, if having stored full but having gone back
When being not received by stopping accumulation of heat instruction, notice DCS heat-accumulator tanks can not completely continue accumulation of heat；Continue to store if heat-accumulator tank is discontented
Heat stops accumulation of heat instruction until receiving, and heat-accumulator tank stops accumulation of heat；
The heat-accumulator tank heat release when receiving heat release instruction, while whether detect heat-accumulator tank empty, if accumulation of heat ullage and do not connect
When receiving stopping heat release instruction, sky can not continue heat release to notice DCS heat-accumulator tanks；Continue if heat-accumulator tank is not empty heat release until
It receives and stops heat release instruction, heat-accumulator tank stops heat release；
（Three）, high-field electrode boiler stop：
（1）It receives and stops peak regulation instruction electrode boiler according to setting outage stopping electrode boiler operation；
（2）It detects whether to receive heat-accumulator tank accumulation of heat order, for heat supply network coupling of electrode boiler when out of service：
The heat-accumulator tank accumulation of heat when receiving accumulation of heat instruction, while detecting whether heat-accumulator tank has stored completely, if having stored full but having gone back
When being not received by stopping accumulation of heat instruction, notice DCS heat-accumulator tanks can not completely continue accumulation of heat；Continue to store if heat-accumulator tank is discontented
Heat stops accumulation of heat instruction until receiving, and heat-accumulator tank stops accumulation of heat.
2. the peak regulation control method of high-field electrode boiler system according to claim 1, it is characterised in that：
Several groups electric boiler and at least one set of accumulation of heat have been set before high-field electrode boiler startup in high-field electrode boiler system
Tank, and set the priority level of each group electric boiler.
3. the peak regulation control method of high-field electrode boiler system according to claim 2, it is characterised in that：
Every group of electrode boiler is separately provided with PID controller, carries out power respectively and return water temperature is adjusted, leaving water temperature is as pot
Stove safe early warning is used.
4. the peak regulation control method of high-field electrode boiler system according to claim 1, it is characterised in that：
The priority level distribution method set as：The high electrode boiler of priority is distributed power at full capacity to start；Remaining work(
Rate distributes to next rank boiler operatiopn, and so on；When dump power is less than the minimum operation power of minimum rank boiler
When, a part of power is allocated from high level-one boiler power needs boiler to be started to meet minimum operation power to minimum level-one；
When dump power is higher than the minimum operation power of minimum rank boiler, minimum level-one boiler directly initiates.
5. the peak regulation control method of high-field electrode boiler system according to claim 4, it is characterised in that：Each priority
Other boiler is switched in the defined time, and every electric boiler is allowed to have the chance of operation.
6. the peak regulation control method of high-field electrode boiler system according to claim 4, it is characterised in that：When certain boiler
When failure, stop the operation of the boiler while starting the low other boiler of level-one entering operation.
7. the peak regulation control method of high-field electrode boiler system according to claim 1, it is characterised in that：DCS detection heat
The return water temperature of motor group calculates the heat that heat supply network needs, and after reporting to control system of power plant, power plant is instructed according to DCS and heat
Network operation situation distributes electrode boiler load.
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| CN201810040188.0A CN108375059B (en) | 2018-01-16 | 2018-01-16 | Peak regulation control method of high-voltage electrode boiler system |
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|---|---|---|---|
| CN201810040188.0A CN108375059B (en) | 2018-01-16 | 2018-01-16 | Peak regulation control method of high-voltage electrode boiler system |
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| CN108375059B CN108375059B (en) | 2019-09-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111009911A (en) * | 2019-12-11 | 2020-04-14 | 国电南瑞科技股份有限公司 | Evaluation method and system for emergency peak regulation standby of heat storage boiler and storage medium |
| CN113983446A (en) * | 2021-10-11 | 2022-01-28 | 广东粤电新会发电有限公司 | Control method and control device of gas steam equipment |
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| CN113983446B (en) * | 2021-10-11 | 2023-12-22 | 广东粤电新会发电有限公司 | Control method and control device of gas steam equipment |
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