CN109460885A - A kind of power generation Energy Consumption Evaluation method of Thermal Power Station's energy balance unit - Google Patents
A kind of power generation Energy Consumption Evaluation method of Thermal Power Station's energy balance unit Download PDFInfo
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- 238000010248 power generation Methods 0.000 title claims abstract description 36
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
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- 239000002817 coal dust Substances 0.000 description 1
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Abstract
The present invention provides a kind of power generation Energy Consumption Evaluation methods of Thermal Power Station's energy balance unit comprising following steps: (1) calculating the fuel gross energy Q of input energy balancing unit1；(2) the external steam of input energy balancing unit, the energy Q of high-temperature medium are calculated2；(3) the medium energy Q outside energy balance unit output unit is calculated3；(4) the power generation standard coal consumption B of energy balance unit is calculated1, calculation is as follows:Calculate the supply standard coal consumption B of energy balance unit2, calculation is as follows:Wherein WfFor the external electric energy of energy balance unit, W1For the output generated energy of energy balance unit, W3Online electric energy is exported for energy balance unit.Power plant Energy Consumption Evaluation method of the invention, by the way of global energy balance, the energy of the energy and output that only test and calculate the input of energy balance unit can calculate the power generation standard coal consumption and supply standard coal consumption of energy balance unit.
Description
Technical field
The present invention relates to a kind of power generation Energy Consumption Evaluation methods of Thermal Power Station's energy balance unit.
Background technique
When Thermal Power Station carries out unit performance test at present, using power generation standard coal consumption and supply standard coal consumption as most
Whole performance indicator.When carrying out electrical power generators standard coal consumption and supply standard coal consumption is calculated, due to the accounting method of positive balance
Fire coal to enter weighing accuracy in boiler very low, it is excessive to will lead to uncertainty.Coal passes heat after burning in boiler
After passing steam, enters back into steam turbine acting and drive electrical power generators, export electric energy.The process duration is longer, generally
For large-scale thermal power generator, electric energy is exported from coal dust firing to electrical power generators, needs at least a few minutes clock time, it is coal-fired with
Instantaneity is not present between steam, dynamic variation is affected to result.Therefore, power generation standard is carried out in Thermal Power Station
When coal consumption and supply standard coal consumption unit performance are tested, it is all made of the calculation method of back balance.
When routinely calculating the performance of generating set using back balance method, using from microcosmic to the calculating process of macroscopic view.
The heat consumption rate of the efficiency of each cylinder body of the efficiency of boiler, steam turbine, steam turbine is first tested and is calculated, station service power consumption rate is counted,
It estimates pipeline efficiency, finally calculates generating set using the heat consumption of steam turbine, station service power consumption rate, boiler efficiency, pipeline efficiency
Power generation standard coal consumption and supply standard coal consumption.Entire test process needs the related thin portion index that entire generating set is all
Final result can be just calculated after the completion of all testing and calculate.It is all kinds of since each test is there are measurement error, calculating error
After error stacks up, so that the result error that different testers finally calculate is often very big, there are various accuracy
Dispute.
In addition, when calculating the performance of generating set using conventional back balance method, it often can only be to single unit progressive
It can calculate, performance accounting cannot be carried out to the even full factory of identical several units simultaneously.But need respectively to every unit into
The average behavior index of a Ge Quan factory can be just calculated after row performance test.Test period is long, measurement point is various, calculating process is tired
Product error is big, and the expense for calculating performance indicator is high and accuracy is low.
Summary of the invention
The technical problems to be solved by the invention are just to provide a kind of Thermal Power Station's energy balance unit testing and evaluation
Method, this kind of method process is simple to operation, can fast, accurately calculate energy balance unit power generation standard coal consumption and
Direct incidence relation is not present in supply standard coal consumption, power generation standard coal consumption and supply standard coal consumption, reduces the system of station service
Meter process.
Above-mentioned technical problem is solved, the invention adopts the following technical scheme:
A kind of power generation Energy Consumption Evaluation method of Thermal Power Station's energy balance unit, comprising the following steps:
(1) the fuel gross energy Q of input energy balancing unit is calculated1, calculation is as follows:
Wherein DgsFor main feedwater flow, HgsFor main Enthalpy of Feed Water, HzqFor main steam enthalpy, DzrFor hot arc reheated steam stream
Amount, HzrFor hot arc reheated steam enthalpy, DlzrFor cold section of reheated steam flow, HlzrFor cold section of reheated steam enthalpy, DzjFor reheating
Attemperation water flow, HzjFor reheating desuperheating water enthalpy, q2For boiler exhaust heat loss, q3For the imperfect combustion heat of fuel ignition gas
Loss, q4For solid-unburning hot loss, q5For the physics heat loss of lime-ash, q6For the radiation loss of boiler；
(2) the external steam of input energy balancing unit, the energy Q of high-temperature medium are calculated2, calculation is as follows:
Wherein H0For the enthalpy of condensed water in therrmodynamic system, DqiTo input steam flow, HqiTo input steam enthalpy；
(3) the medium energy Q outside energy balance unit output unit is calculated3, calculation is as follows:
Wherein DoiTo export steam flow, HoiFor output medium enthalpy；
(4) the power generation standard coal consumption B of energy balance unit is calculated1, calculation is as follows:
Calculate the supply standard coal consumption B of energy balance unit2, calculation is as follows:
Wherein WfFor the external electric energy of energy balance unit, W1For the output generated energy of energy balance unit, W3For energy
Balancing unit output online electric energy.
The energy balance unit can be a unit style unit or several units or entire Thermal Power Station.It is mutually accrued
What is obtained is the Energy Consumption Evaluation of a unit style unit, the Energy Consumption Evaluation of several units and the energy consumption of entire Thermal Power Station
Evaluation.
The principle of the method for the present invention: the energy summation of generating set input, the as total energy consumption of generating set, with generator
The generator outlet power of group is divided by for the standard coal consumption that generates electricity, and is divided by with generating set online power for supply standard coal consumption, should
The calculated result of kind supply standard coal consumption and the standard coal consumption that generates electricity is not directly dependent upon with generating set station service power consumption rate.
The total energy consumption of generating set has three ways, such as following:
1, fuel gross energy
Using the back balance calculation method of boiler, the boiler efficiency under the generating set load condition is calculated.Utilize master
Feedwater flow calculates the energy that main water supply is absorbed from boiler, and energy loss caused by the leakage of boiler etc. is all attributed to from pot
The energy absorbed in furnace；Reheat system is calculated using cold section of reheated steam flow and reheater attemperation water flow to absorb from boiler
Energy；Sum of the two is the energy that vapour system is absorbed from boiler.The energy that vapour system absorbs is divided by with boiler efficiency,
Calculate the fuel gross energy that energy body is directly inputted from the external world.
2, steam gross energy
All kinds of different quality steams that generating set enters from the external world indirectly, for various applications, the enthalpy of all kinds of steam
The difference for the condensed water enthalpy that value and turbine condenser generate is the interior energy of unit steam, and the energy of all kinds of steam inputs steams for it
The summation that steam flow amount is multiplied with unit internal steam work calculates steam gross energy.
3, electric energy total amount
Generating set is used for the sum of the electric energy total amount of all kinds of purposes from extraneous input indirectly.
This kind power generation Calculation Method of Energy Consumption is applicable not only to the energy consumption calculation of single generating set；If can equally be well applied to
Adjacent generating set or even entire Thermal Power Station energy balance unit as a whole are done, to calculate several similar power generations
The whole energy consumption level of the even entire Thermal Power Station of the whole energy consumption of unit.
The invention has the following advantages:
(1) power plant Energy Consumption Evaluation method of the invention, by the way of global energy balance, with single generating set or
The even entire thermal power generation field of several same types energy balance unit as a whole, only tests and calculates energy balance list
The energy of member input and the energy of output can calculate the power generation standard coal consumption and supply standard coal consumption of energy balance unit,
Direct incidence relation is not present in power generation standard coal consumption and supply standard coal consumption, reduces the statistic processes of station service；
(2) power plant Energy Consumption Evaluation method of the invention uses the method calculated from macroscopic view, does not need flat to entire energy
The unit that weighs carries out a variety of different microcosmic accounting, such as calculates thermal loss of steam turbine rate, statistics station service power consumption rate, does not deposit in calculating process
In a variety of deviation accumulations for calculating links, test that the measurement point taken is few, and calculating process is brief, the final accuracy of accounting relatively passes
The evaluation method of system is more acurrate, intuitive；
(3) power plant Energy Consumption Evaluation method of the invention is when calculating energy balance unit input energy, since fuel is total
The calculating error of energy is larger, using the calculation of boiler input energy back balance, it is only necessary to calculate boiler efficiency, and master gives
Water, which all becomes the interior of main steam, can increase, can increase in reheated steam, so that it may accurately calculate fuel gross energy；Steam is total
Energy is to input the enthalpy of steam and the enthalpy difference of low pressure condensate water as its energy per mass, so that it may accordingly calculate difference
The gross energy of quality, quality steam；The accounting of inputing power, all to enter this unit from this energy balancing unit external world completely
Electric energy summation, do not include the electric energy for this unit subsidiary engine taken from this unit steam turbine generator for high factory's transformer.
Transformer loss that (4) power plant Energy Consumption Evaluation method of the invention occurs generating set in power generation process,
Loss, electric efficiency loss of electrical energy transportation process etc. avoid station service from uniting also as the energy input part in power generation process
Meter process only counts the direct consumption electric energy of electronic class subsidiary engine used in this unit, and the calculating loophole that the part energy consumption is ignored；
(5) power plant Energy Consumption Evaluation method of the invention, can be simultaneously to the even full factory's progressive of identical several units
It can calculate, the test evaluation period is short, process is simple, accuracy is high, low in cost.
Detailed description of the invention
Fig. 1 is the input fuel energy calculation flow chart of present invention power generation Energy Consumption Evaluation method energy balance unit；
Fig. 2 is the high-temperature medium energy balane flow chart of present invention power generation Energy Consumption Evaluation method energy balance unit；
Fig. 3 is the energy consumption calculation flow chart of present invention power generation Energy Consumption Evaluation method energy balance unit.
Specific embodiment
The technical solution that the present invention will be described in detail in the following with reference to the drawings and specific embodiments.
The power generation Energy Consumption Evaluation method of a 600MW thermal power generator as shown in Figs. 1-3 comprising following steps:
(1) the fuel gross energy Q of input thermal power generator is calculated1, calculation is as follows:
Wherein DgsFor main feedwater flow, HgsFor main Enthalpy of Feed Water, HzqFor main steam enthalpy, DzrFor hot arc reheated steam stream
Amount, HzrFor hot arc reheated steam enthalpy, DlzrFor cold section of reheated steam flow, HlzrFor cold section of reheated steam enthalpy, DzjFor reheating
Attemperation water flow, HzjFor reheating desuperheating water enthalpy, q2For boiler exhaust heat loss, q3For the imperfect combustion heat of fuel ignition gas
Loss, q4For solid-unburning hot loss, q5For the physics heat loss of lime-ash, q6For the radiation loss of boiler；
(2) the external steam of input thermal power generator, the energy Q of high-temperature medium are calculated2, calculation is as follows:
Wherein H0For the enthalpy of condensed water in therrmodynamic system, DqiTo input steam flow, HqiTo input steam enthalpy；
(3) the medium energy Q outside thermal power generator output unit is calculated3, calculation is as follows:
Wherein DoiTo export steam flow, HoiFor output medium enthalpy；
(4) the power generation standard coal consumption B of thermal power generator is calculated1, calculation is as follows:
Calculate the supply standard coal consumption B of energy balance unit2, calculation is as follows:
Wherein WfFor the external electric energy of energy balance unit, W1For the output generated energy of energy balance unit, W3For energy
Balancing unit output online electric energy.
The relevant parameter of generating set and conventional Calculation Method, present invention power generation Energy Consumption Evaluation method calculate in the present embodiment
It the results are shown in Table 1.
1 generating set of table power generation energy consumption conventional Calculation Method and present invention power generation Energy Consumption Evaluation method calculated result
Seen from table 1, the power generation energy consuming process of thermal power generator of the present invention can accurately calculate generating set
Generate electricity standard coal consumption and supply standard coal consumption, and compared with conventional calculation method, power generation standard coal consumption and supply standard coal consumption are not
There are direct incidence relations, reduce the statistic processes of station service.
Claims (5)
1. a kind of power generation Energy Consumption Evaluation method of Thermal Power Station's energy balance unit, which comprises the following steps:
(1) the fuel gross energy Q of input energy balancing unit is calculated1；
(2) the external steam of input energy balancing unit, the energy Q of high-temperature medium are calculated2；
(3) the medium energy Q outside energy balance unit output unit is calculated3；
(4) the power generation standard coal consumption B of energy balance unit is calculated1, calculation is as follows:
Calculate the supply standard coal consumption B of energy balance unit2, calculation is as follows:
Wherein WfFor the external electric energy of energy balance unit, W1For the output generated energy of energy balance unit, W3For energy balance
Unit output online electric energy.
2. the power generation Energy Consumption Evaluation method of Thermal Power Station's energy balance unit according to claim 1, which is characterized in that
Q in the step (1)1Its calculation is as follows:
Wherein DgsFor main feedwater flow, HgsFor main Enthalpy of Feed Water, HzqFor main steam enthalpy, DzrFor hot arc reheated steam flow, Hzr
For hot arc reheated steam enthalpy, DlzrFor cold section of reheated steam flow, HlzrFor cold section of reheated steam enthalpy, DzjFor reheating desuperheating water
Flow, HzjFor reheating desuperheating water enthalpy, q2For boiler exhaust heat loss, q3For the imperfect combustion heat loss of fuel ignition gas, q4
For solid-unburning hot loss, q5For the physics heat loss of lime-ash, q6For the radiation loss of boiler.
3. the power generation Energy Consumption Evaluation method of Thermal Power Station's energy balance unit according to claim 1, which is characterized in that
Q in the step (2)2Its calculation is as follows:
Wherein H0For the enthalpy of condensed water in therrmodynamic system, DqiTo input steam flow, HqiTo input steam enthalpy.
4. the power generation Energy Consumption Evaluation method of Thermal Power Station's energy balance unit according to claim 1, which is characterized in that
Q in the step (3)3Its calculation is as follows:
Wherein DoiTo export steam flow, HoiFor output medium enthalpy.
5. the power generation Energy Consumption Evaluation method of Thermal Power Station's energy balance unit according to claim 1-4,
It is characterized in that, the energy balance unit is a unit style unit or several units or entire Thermal Power Station.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111159624A (en) * | 2019-12-19 | 2020-05-15 | 华电电力科学研究院有限公司 | Method for calculating heat supply coal consumption rate of new steam and extracted steam combined heat supply unit |
| CN111445152A (en) * | 2020-03-31 | 2020-07-24 | 广西大学 | Accounting electric power system virtual water transmission method and system |
| CN113283701A (en) * | 2021-04-22 | 2021-08-20 | 李智才 | Power generation and heat supply coal consumption accounting system of thermal power generating unit in conventional operation mode |
| CN114997623A (en) * | 2022-05-25 | 2022-09-02 | 华北电力科学研究院有限责任公司 | Method and device for evaluating back pressure function |
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| CN111159624A (en) * | 2019-12-19 | 2020-05-15 | 华电电力科学研究院有限公司 | Method for calculating heat supply coal consumption rate of new steam and extracted steam combined heat supply unit |
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| CN111445152A (en) * | 2020-03-31 | 2020-07-24 | 广西大学 | Accounting electric power system virtual water transmission method and system |
| CN113283701A (en) * | 2021-04-22 | 2021-08-20 | 李智才 | Power generation and heat supply coal consumption accounting system of thermal power generating unit in conventional operation mode |
| CN113283701B (en) * | 2021-04-22 | 2024-03-19 | 李智才 | Power generation and heat supply coal consumption accounting system under conventional operation mode of thermal power generating unit |
| CN114997623A (en) * | 2022-05-25 | 2022-09-02 | 华北电力科学研究院有限责任公司 | Method and device for evaluating back pressure function |
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