阅读说明：本技术 一种聚光式太阳能发电站的性能考核试验方法 (Performance assessment test method for concentrating solar power station ) 是由 聂雨 单绍荣 钟平 王安庆 王峰 黄伟 史燕红 宋金时 郑磊 张丁凡 于 2020-12-16 设计创作，主要内容包括：本发明提供了一种聚光式太阳能发电站的性能考核试验方法,其用于对聚光式太阳能发电站的年发电量∑P和设备投入率a进行性能考核试验。其预先对聚光式太阳能发电的工作状态进行定义,聚光式太阳能发电站运行一个考核年度,只存在以下四个工作状态,将其定义如下：1、设计工作日运行状态,假设运行工作日天数为S1；2、非设计工作日运行状态,假设运行工作日天数为S2；3、聚光性能偏离运行状态,假设运行工作日天数为S3；4、停运状态,假设停运工作日天数为S4。(The invention provides a performance assessment test method for a concentrating solar power station, which is used for performing performance assessment tests on annual energy production sigma P and equipment investment rate a of the concentrating solar power station. The working state of the concentrating solar power generation is defined in advance, the concentrating solar power station operates for one check year, and only the following four working states exist and are defined as follows: 1. designing a working day running state, and assuming that the number of days of the working day is S1; 2. the operation state of the non-design working day is assumed to be S2; 3. the light gathering performance deviates from the running state, and the number of days of the running working day is assumed to be S3; 4. in the shutdown state, the number of days of shutdown on weekdays is assumed to be S4.)

1. A performance assessment test method for a concentrating solar power station is characterized in that the working state of concentrating solar power generation is defined in advance, the concentrating solar power station operates for one assessment year, and only the following four working states exist and are defined as follows:

a. designing a working day running state, and assuming that the number of days of the working day is S1; the concentrating solar power station is in a state of running in a working day with design environmental parameters and a designed reflectivity of a concentrating system;

b. the operation state of the non-design working day is assumed to be S2; the concentrating solar power station is in a state of running in a working day deviating from design environment parameters but the concentrating system reaches the designed reflectivity;

c. the light gathering performance deviates from the running state, and the number of days of the running working day is assumed to be S3; the performance of a solar reflector directly influences the light condensation efficiency, the light condensation system of a light condensation type solar power station which is just put into operation is clean, namely the solar reflector is clean, the light condensation system operates under the design efficiency, the reflectivity of the light condensation system is gradually reduced due to the dirt of the surface of the reflector after the light condensation system operates for a period of time, the light condensation performance is gradually reduced, when the power generation efficiency is seriously influenced, the reflector needs to be cleaned, after the cleaning of all mirror fields is finished, the light condensation system returns to the design efficiency, and the process is repeated;

d. the outage state, assuming the number of days of the outage day is S4; a state in which the solar power generation is not suitable for weather reasons or the power generation is not possible due to equipment reasons, resulting in the outage of the power station;

as can be seen from the above definition, the concentrating solar power station operates only in the above four states every day, and therefore the annual power generation amount Σ P of the concentrating solar power station can be calculated by the following equation:

∑P＝∑P_S1+S2+S3+∑P_S4 (1)

according to this formula, since ∑ P_S40, so only ∑ P is needed_S1+S2+S3The corresponding guarantee value is reached;

according to the working state of the concentrating solar power station, the performance assessment test working conditions are set as follows:

A. working condition 1: selecting a working day on which the mirror surface is completely cleaned and the solar radiation amount is the annual average DNI value to perform a TEST, wherein the TEST time is one working day, and additionally arranging a special high-precision TEST instrument to TEST related physical quantity, wherein the TEST number is TEST 01;

B. working condition 2: selecting a working day on which a mirror surface is about to start to be cleaned in the next period, namely the mirror field efficiency is the lowest, the solar radiation amount is the annual average DNI value, carrying out a TEST, the TEST time is one working day, and a high-precision TEST special instrument is additionally arranged to TEST related physical quantities, wherein the TEST number is TEST 02;

C. working condition 3: selecting a working day on which a mirror surface is cleaned by half and the solar radiation amount is the annual average DNI value to perform a TEST, wherein the TEST time is one working day, and a special high-precision TEST instrument is additionally arranged to TEST related physical quantity, and the TEST number is TEST 03;

D. working condition 4: selecting a working day on which the mirror surface is completely cleaned and the solar radiation DNI is 15% higher than the annual average value to perform a TEST, testing for one working day, and additionally installing a high-precision TEST special instrument to TEST related physical quantity, wherein the TEST number is TEST 04;

E. working condition 5: selecting a working day on which the mirror surface is completely cleaned and the solar radiation DNI is lower than the annual average value by 15 percent to perform a TEST, testing for one working day, and additionally installing a special high-precision TEST instrument to TEST related physical quantity, wherein the TEST number is TEST 05;

F. at other times of the assessment year, a running low-precision instrument is adopted to continuously test related physical quantities, data are recorded by taking each day as a unit, the number is TESTi, and the number is counted as S;

I. according to the TEST results of TEST01, TEST02 and TEST03, an influence function mu (G) of the change of the mirror field efficiency on the power generation amount can be obtained through fitting;

II. According to the TEST results of TEST01, TEST04 and TEST05, an influence function mu (DNI) of DNI change of solar radiation on the power generation amount can be obtained through fitting;

and III, correcting the generated energy of the unit on any day to the generated energy of the unit under the design environmental condition according to the known functional relation in definition 1:

P_{i design}＝P_i*μ(DNI)*μ(G)*μ(T)*μ(AP)*μ(H)*μ(v) (2)

If the efficiency, the equipment reliability and the annual weather index of the assessment of the power station reach the design values, theoretically:

∑P≤∑^S1+S2+S3 _i＝1P_{i design}≤∑^S1+S2+S3 _i＝1P_i*μ(DNI)*μ(G)*μ(T)*μ(AP)*μ(H)*μ(v) (3)

IV, substituting the test data in the TESTi of each day into a formula 2 and a formula 3 to judge the sigma P_{Test of}Whether a performance guarantee value sigma P is reached;

v, equipment input rate a_{Test of}(1-S/365 24) 100%, then a can be judged_{Test of}Whether the performance guarantee value a is reached.

2. The performance assessment test method of the concentrating solar power station as claimed in claim 1, wherein: the external environment parameters influencing the power generation performance of the concentrating solar power station comprise solar radiation intensity DNI, ambient temperature T, atmospheric pressure AP, atmospheric humidity H and wind speed v, and the design working day operation state, namely the working day operation state of the concentrating solar power station, wherein the external environment factors reach or approach the original design conditions.

3. The performance assessment test method of the concentrating solar power station as claimed in claim 1, wherein: in an assessment year, due to changes of four seasons, the environmental parameters can continuously deviate from original design conditions, and the changes of the environmental parameters can affect the power generation performance of the concentrating solar power station, wherein the influence functions mu (T), mu (AP), mu (H) and mu (v) of the four parameters of the environmental temperature T, the atmospheric pressure AP, the atmospheric humidity H and the wind speed v on the power station performance are generally given by an equipment side in the design stage and belong to known quantities, and the influence functions are generally called as a performance correction curve of the environmental factors on the power station.

4. The performance assessment test method of the concentrating solar power station as claimed in claim 1, wherein: factors for which the environmental parameter does not reach the design value include, but are not limited to, cloud, haze, seasonal factors.

Technical Field

The invention relates to the technical field of solar power generation, in particular to a performance assessment test method for a concentrating solar power station.

Background

A light-gathering solar power station, which is also called as a photo-thermal power station and a CSP power station for short, is a power generation mode that an optical device is used for gathering solar radiation energy, the solar radiation energy is projected to a heat collection pipeline and a working medium in a heating pipe, heat is transferred by the working medium to heat circulating water to generate steam for pushing a steam turbine, and the steam turbine drives a generator to generate power.

The current light-concentrating solar power station is divided into a solar light-concentrating heat collecting system, an energy storage system and a steam power generation system, and a complete working day running state of the solar light-concentrating heat collecting system is that when the sun rises to reach the light-concentrating condition, the light-concentrating heat collecting system converts solar radiation energy into heat energy, the heat energy is collected and transmitted to the steam power generation system through the energy storage system to generate power, the light-concentrating heat collecting system stops working along with the falling of the sun, the energy storage system starts reverse running, the heat stored in the daytime is transmitted to the power generation system to continue generating power until the sun rises again, and therefore 24-hour uninterrupted power generation.

When any power station is put into production, party B and party A agree on a performance guarantee value as a basis for evaluating the performance level of the power station, and in order to verify whether the real performance of the power station after the production reaches the guarantee value, a performance assessment test is usually carried out on the power station. Before the concentrating solar power station is put into production, the performance guarantee values agreed by the party A and the party B are generally the standard annual energy production sigma P and the equipment investment rate a of the power station.

As a conventional coal-fired power station or a combined cycle power station is developed, the performance assessment test execution method of the conventional coal-fired power station or the combined cycle power station has authoritative performance assessment test standards which can be referred to, such as American ASME standards, Chinese GB and other performance test standards, and the like, and the standards specify a test method and a calculation method of a corresponding power plant performance assessment test in detail, so that the conventional power station performance assessment test is generally executed without problems. However, because the concentrating solar power station is a new thing in the field of power generation, the production performance assessment test of the concentrating solar power station has no related test standard to refer to internationally and domestically, and because of the technical particularity of photo-thermal power generation, according to the prediction of internationally experts, the performance assessment test standard of the concentrating solar power station is difficult to release in a long time in the future, so that the performance assessment test of the concentrating solar power station is executed without a authoritative performance test standard as a basis, and has great uncertainty, and a universal test method is not basically formed.

Disclosure of Invention

In order to solve the problems, the invention provides a performance assessment test method for a concentrating solar power station, which is used for performing performance assessment tests on annual energy production sigma P and equipment investment rate a of the concentrating solar power station, can effectively solve the defect that the concentrating solar power station is lack of a universal performance assessment test method at present, greatly saves the cost of the performance assessment tests of the concentrating solar power station, has considerable test precision, and has great promotion effect on the production assessment of the concentrating solar power station.

A performance assessment test method for a concentrating solar power station is characterized in that the working state of concentrating solar power generation is defined in advance, the concentrating solar power station operates for one assessment year, and only the following four working states exist and are defined as follows:

a. designing a working day running state, and assuming that the number of days of the working day is S1; the concentrating solar power station is in a state of running in a working day with design environmental parameters and a designed reflectivity of a concentrating system;

b. the operation state of the non-design working day is assumed to be S2; the concentrating solar power station is in a state of running in a working day deviating from design environment parameters but the concentrating system reaches the designed reflectivity;

c. the light gathering performance deviates from the running state, and the number of days of the running working day is assumed to be S3; the performance of a solar reflector directly influences the light condensation efficiency, the light condensation system of a light condensation type solar power station which is just put into operation is clean, namely the solar reflector is clean, the light condensation system operates under the design efficiency, the reflectivity of the light condensation system is gradually reduced due to the dirt of the surface of the reflector after the light condensation system operates for a period of time, the light condensation performance is gradually reduced, when the power generation efficiency is seriously influenced, the reflector needs to be cleaned, after the cleaning of all mirror fields is finished, the light condensation system returns to the design efficiency, and the process is repeated;

d. the outage state, assuming the number of days of the outage day is S4; a state in which the solar power generation is not suitable for weather reasons or the power generation is not possible due to equipment reasons, resulting in the outage of the power station;

as can be seen from the above definition, the concentrating solar power station operates only in the above four states every day, and therefore the annual power generation amount Σ P of the concentrating solar power station can be calculated by the following equation:

∑P＝∑P_S1+S2+S3+∑P_S4 (1)

according to this formula, since ∑ P_S40, so only ∑ P is needed_S1+S2+S3The corresponding guarantee value is reached;

according to the working state of the concentrating solar power station, the performance assessment test working conditions are set as follows:

A. working condition 1: selecting a working day on which the mirror surface is completely cleaned and the solar radiation amount is the annual average DNI value to perform a TEST, wherein the TEST time is one working day, and additionally arranging a special high-precision TEST instrument to TEST related physical quantity, wherein the TEST number is TEST 01;

B. working condition 2: selecting a working day on which a mirror surface is about to start to be cleaned in the next period, namely the mirror field efficiency is the lowest, the solar radiation amount is the annual average DNI value, carrying out a TEST, the TEST time is one working day, and a high-precision TEST special instrument is additionally arranged to TEST related physical quantities, wherein the TEST number is TEST 02;

C. working condition 3: selecting a working day on which a mirror surface is cleaned by half and the solar radiation amount is the annual average DNI value to perform a TEST, wherein the TEST time is one working day, and a special high-precision TEST instrument is additionally arranged to TEST related physical quantity, and the TEST number is TEST 03;

D. working condition 4: selecting a working day on which the mirror surface is completely cleaned and the solar radiation DNI is 15% higher than the annual average value to perform a TEST, testing for one working day, and additionally installing a high-precision TEST special instrument to TEST related physical quantity, wherein the TEST number is TEST 04;

E. working condition 5: selecting a working day on which the mirror surface is completely cleaned and the solar radiation DNI is lower than the annual average value by 15 percent to perform a TEST, testing for one working day, and additionally installing a special high-precision TEST instrument to TEST related physical quantity, wherein the TEST number is TEST 05;

F. at other times of the assessment year, a running low-precision instrument is adopted to continuously test related physical quantities, data are recorded by taking each day as a unit, the number is TESTi, and the number is counted as S;

I. according to the TEST results of TEST01, TEST02 and TEST03, an influence function mu (G) of the change of the mirror field efficiency on the power generation amount can be obtained through fitting;

II. According to the TEST results of TEST01, TEST04 and TEST05, an influence function mu (DNI) of DNI change of solar radiation on the power generation amount can be obtained through fitting;

and III, correcting the generated energy of the unit on any day to the generated energy of the unit under the design environmental condition according to the known functional relation in definition 1:

P_{i design}＝P_i*μ(DNI)*μ(G)*μ(T)*μ(AP)*μ(H)*μ(v) (2)

If the efficiency, the equipment reliability and the annual weather index of the assessment of the power station reach the design values, theoretically:

∑P≤∑^S1+S2+S3 _i＝1P_{i design}≤∑^S1+S2+S3 _i＝1P_i*μ(DNI)*μ(G)*μ(T)*μ(AP)*μ(H)*μ(v) (3)

IV, substituting the test data in the TESTi of each day into a formula 2 and a formula 3 to judge the sigma P_{Test of}Whether a performance guarantee value sigma P is reached;

v, equipment input rate a_{Test of}(1-S/365 24) 100%, then a can be judged_{Test of}Whether the performance guarantee value a is reached.

It is further characterized in that:

the external environment parameters influencing the power generation performance of the concentrating solar power station comprise solar radiation intensity DNI, environment temperature T, atmospheric pressure AP, atmospheric humidity H and wind speed v, and the working day running state is designed, namely the working day running state of the concentrating solar power station, wherein the external environment factors reach or are close to the original design conditions;

in an assessment year, due to the change of four seasons, environmental parameters can continuously deviate from the original design conditions, and the change of the environmental parameters can affect the power generation performance of the concentrating solar power station, wherein the influence functions mu (T), mu (AP), mu (H) and mu (v) of the environmental temperature T, the atmospheric pressure AP, the atmospheric humidity H and the wind speed v on the power station performance are generally given by an equipment party in the design stage and belong to known quantities, and the influence functions are generally called as performance correction curves of environmental factors on the power station;

factors for which the environmental parameter does not reach the design value include, but are not limited to, cloud, haze, seasonal factors.

After the technical scheme is adopted, the performance assessment test method is used for performing the performance assessment test on the annual energy production sigma P and the equipment investment rate a of the concentrating solar power station, has strong operability, can effectively overcome the defect that the conventional concentrating solar power station lacks a universal performance assessment test method, greatly saves the cost of the performance assessment test of the concentrating solar power station, has considerable test precision, and has great promotion effect on the production assessment of the concentrating solar power station.

Detailed Description

A performance assessment test method for a concentrating solar power station defines the working state of concentrating solar power generation in advance, the concentrating solar power station operates for one assessment year, and only the following four working states exist and are defined as follows:

a. designing a working day running state, and assuming that the number of days of the working day is S1; the concentrating solar power station is in a state of running in a working day with design environmental parameters and a designed reflectivity of a concentrating system;

b. the operation state of the non-design working day is assumed to be S2; the concentrating solar power station is in a state of running in a working day deviating from design environment parameters but the concentrating system reaches the designed reflectivity;

c. the light gathering performance deviates from the running state, and the number of days of the running working day is assumed to be S3; the performance of a solar reflector directly influences the light condensation efficiency, the light condensation system of a light condensation type solar power station which is just put into operation is clean, namely the solar reflector is clean, the light condensation system operates under the design efficiency, the reflectivity of the light condensation system is gradually reduced due to the dirt of the surface of the reflector after the light condensation system operates for a period of time, the light condensation performance is gradually reduced, when the power generation efficiency is seriously influenced, the reflector needs to be cleaned, after the cleaning of all mirror fields is finished, the light condensation system returns to the design efficiency, and the process is repeated;

d. the outage state, assuming the number of days of the outage day is S4; a state in which the solar power generation is not suitable for weather reasons or the power generation is not possible due to equipment reasons, resulting in the outage of the power station;

as can be seen from the above definition, the concentrating solar power station operates only in the above four states every day, and therefore the annual power generation amount Σ P of the concentrating solar power station can be calculated by the following equation:

∑P＝∑P_S1+S2+S3+∑P_S4 (1)

according to this formula, since ∑ P_S40, so only ∑ P is needed_S1+S2+S3The corresponding guarantee value is reached;

according to the working state of the concentrating solar power station, the performance assessment test working conditions are set as follows:

A. working condition 1: selecting a working day on which the mirror surface is completely cleaned and the solar radiation amount is the annual average DNI value to perform a TEST, wherein the TEST time is one working day, and additionally arranging a special high-precision TEST instrument to TEST related physical quantity, wherein the TEST number is TEST 01;

B. working condition 2: selecting a working day on which a mirror surface is about to start to be cleaned in the next period, namely the mirror field efficiency is the lowest, the solar radiation amount is the annual average DNI value, carrying out a TEST, the TEST time is one working day, and a high-precision TEST special instrument is additionally arranged to TEST related physical quantities, wherein the TEST number is TEST 02;

C. working condition 3: selecting a working day on which a mirror surface is cleaned by half and the solar radiation amount is the annual average DNI value to perform a TEST, wherein the TEST time is one working day, and a special high-precision TEST instrument is additionally arranged to TEST related physical quantity, and the TEST number is TEST 03;

D. working condition 4: selecting a working day on which the mirror surface is completely cleaned and the solar radiation DNI is 15% higher than the annual average value to perform a TEST, testing for one working day, and additionally installing a high-precision TEST special instrument to TEST related physical quantity, wherein the TEST number is TEST 04;

E. working condition 5: selecting a working day on which the mirror surface is completely cleaned and the solar radiation DNI is lower than the annual average value by 15 percent to perform a TEST, testing for one working day, and additionally installing a special high-precision TEST instrument to TEST related physical quantity, wherein the TEST number is TEST 05;

F. at other times of the assessment year, a running low-precision instrument is adopted to continuously test related physical quantities, data are recorded by taking each day as a unit, the number is TESTi, and the number is counted as S;

I. according to the TEST results of TEST01, TEST02 and TEST03, an influence function mu (G) of the change of the mirror field efficiency on the power generation amount can be obtained through fitting;

II. According to the TEST results of TEST01, TEST04 and TEST05, an influence function mu (DNI) of DNI change of solar radiation on the power generation amount can be obtained through fitting;

and III, correcting the generated energy of the unit on any day to the generated energy of the unit under the design environmental condition according to the known functional relation in definition 1:

P_{i design}＝P_i*μ(DNI)*μ(G)*μ(T)*μ(AP)*μ(H)*μ(v) (2)

If the efficiency, the equipment reliability and the annual weather index of the assessment of the power station reach the design values, theoretically:

∑P≤∑^S1+S2+S3 _i＝1P_{i design}≤∑^S1+S2+S3 _i＝1P_i*μ(DNI)*μ(G)*μ(T)*μ(AP)*μ(H)*μ(v) (3)

IV, substituting the test data in the TESTi of each day into a formula 2 and a formula 3 to judge the sigma P_{Test of}Whether a performance guarantee value sigma P is reached;

v, equipment input rate a_{Test of}(1-S/365 24) 100%, then a can be judged_{Test of}Whether the performance guarantee value a is reached.

The performance assessment method is used for performing performance assessment tests on annual power generation amount sigma P and equipment input rate a of the concentrating solar power station, has strong operability, can effectively overcome the defect that the concentrating solar power station is lack of a universal performance assessment test method at present, greatly saves the cost of the performance assessment tests of the concentrating solar power station, has considerable test precision, and has great promotion effect on the production assessment of the concentrating solar power station.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.