CN105929330A - Determination method and system for response time of primary frequency modulation of generating set - Google Patents
Determination method and system for response time of primary frequency modulation of generating set Download PDFInfo
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- CN105929330A CN105929330A CN201610233471.6A CN201610233471A CN105929330A CN 105929330 A CN105929330 A CN 105929330A CN 201610233471 A CN201610233471 A CN 201610233471A CN 105929330 A CN105929330 A CN 105929330A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
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Abstract
The invention relates to a determination method and system for response time of primary frequency modulation of a generating set, and belongs to the frequency modulation field of the thermal power generating set. The method comprises the following steps that (1) a rotating speed difference is set in a DCS control system so that the set carries out primary frequency modulation; (2) a data collection unit of the DCS control system is used to collect test data of primary frequency modulation of the set; (3) the collected test data is stored by a storage unit and then output to form a curve map; and (4) the moment that a motion instruction of primary frequency instruction is emitted in marked as time T0 in the curve map, the practical load, corresponding to the point, of the set is Q, and after that the motion instruction of primary frequency instruction is emitted, the moment that the practical load change Q of the set exceeds Q+/-0.5%Pe (Pe represents the rated load of the set) is marked as time T1. The method can be used to calculate response time of the primary frequency modulation test accurately.
Description
Technical field
The present invention relates to the frequency modulation field of a kind of thermal power generation unit, particularly to a kind of determination method of frequency modulation response time.
Background technology
100MW and above unit primary frequency regulation of power network performance test be power system important relate to net pilot project, the most domestic possessed specification to the test of Large-scale machine set primary frequency modulation performance, the test method of science, issue and implemented relevant test guidance and control of acceptance, but from issuing the test guidance and control of acceptance implemented, we are it is seen that still lack the determination method to unit primary frequency modulation test response time unification, causing can not science when carrying out the test of unit primary frequency modulation, calculate accurately and determine response time, have a strong impact on and the correct of unit primary frequency modulation performance is judged and evaluate.It is therefore desirable to the calculating setting up a kind of generating set primary frequency regulation response time determines method, primary frequency modulation test specification and standardization can be made, normalized technical basis is provided to dispatching of power netwoks, for ensureing that mains frequency is stablized, improve the safety and stability of operation of power networks, promote that the fast development of electrical network has great importance.
Summary of the invention
The present invention proposes the determination method and system of a kind of primary frequency modulation response time.
The determination method of the present invention a kind of generating set primary frequency regulation response time, it is characterised in that comprise the steps:
(1) rotating speed official post unit primary frequency modulation unit is set in DCS control system and carries out primary frequency modulation action；
(2) unit primary frequency modulation test data is gathered by the data acquisition unit of DCS control system；
(3) export after the test data collected being stored by memory element, forming curves figure；
(4) being labeled as moment T0 in the graph in the moment that primary frequency modulation action command sends, the unit actual load that this point is corresponding is Q；After primary frequency modulation action command sends, unit actual load change Q, beyond (Pe is unit rated load) during Q ± 0.5%Pe, is designated as moment T1；
(5) the primary frequency modulation response time obtained by: T=T1-T0.
Preferably, described speed discrepancy is ± 4 r/min～between ± 11r/min.
It is further preferred that described speed discrepancy is ± 4 r/min.
It is further preferred that described speed discrepancy is ± 11 r/min.
It is further preferred that described speed discrepancy is ± 6r/min.
Unit primary frequency modulation response time can be determined by the method for the invention accurately, utilize start time and terminal that this method determines, can accurately calculate the response time of primary frequency modulation test, after primary frequency modulation response time data is contrasted with respective performances index, can judge that primary frequency modulation response time index is the most qualified as initial data, be effectively improved unit primary frequency modulation test efficiency.
A kind of system determining generating set primary frequency regulation response time of the present invention, including DCS control system, described DCS control system includes primary frequency modulation control unit, data acquisition unit, data storage cell, data analysis unit and the performance element being sequentially connected with.
Preferably, described data analysis unit is provided with interconnective comparator and trigger.
A kind of system determining generating set primary frequency regulation response time of the present invention, the starting time and terminal time that primary frequency modulation responds can effectively and be accurately determined by the action of primary frequency modulation control unit and the analyzing and processing of data analysis unit, the most normal precisely to judge primary frequency modulation response time, improve unit primary frequency modulation test efficiency, native system attachment structure is simple, result output is clear understandable, and efficiency is high, can industrialized production.
Accompanying drawing explanation
Fig. 1 is the attachment structure schematic diagram of the system of generating set primary frequency regulation response time of the present invention.
1-primary frequency modulation control unit in figure；2-data acquisition unit；3-data storage cell；4-data analysis unit；5-performance element.
Detailed description of the invention
Embodiment 1.
The determination method of the present invention a kind of generating set primary frequency regulation response time, comprises the steps:
(1) the primary frequency modulation unit 1 arranging rotating speed official post unit in DCS control system carries out primary frequency modulation action；
(2) unit primary frequency modulation test data is gathered by the data acquisition unit 2 of DCS control system；
(3) export after the test data collected being stored by data storage cell 3, forming curves figure；
(4) being labeled as moment T0 in the graph in the moment that primary frequency modulation action command sends, the unit actual load that this point is corresponding is Q；After primary frequency modulation action command sends, unit actual load change Q, beyond (Pe is unit rated load) during Q ± 0.5%Pe, is designated as moment T1；
Obtained primary frequency modulation response time: T=T1-T0.
Speed discrepancy described in the present embodiment is preferably ± 4 r/min.
During work, first the speed discrepancy of one ± 4 r/min is set in DCS control system, unit primary frequency modulation unit 1 is made to carry out primary frequency modulation action, as a example by rated load 600MW unit, taking 5% according to speed governor droop, rated speed is 3000 r/min, and speed dead bend is that the parameter of ± 2 r/min sets, being 4MW by being calculated coefficient of frequency modulation, primary frequency modulation actuating quantity is 8MW；Then data acquisition unit 2 gathers unit primary frequency modulation test data, export after being stored by data storage cell 3, forming curves figure, when primary frequency modulation unit 1 primary frequency modulation action command sends time instant, it is designated as time T0 in the graph, when finding unit actual load change Q in the graph beyond Q ± 0.5%Pe, it is designated as moment T1, by being calculated primary frequency modulation response time: T=T1-T0.
The present embodiment setting speed difference is ± 4 r/min, primary frequency modulation actuating quantity can be made to reach 8MW, this actuating quantity can make curve chart produce bigger change in frequency modulation moment, it is more conducive to exchange precisely determining of frequency response time beginning and end, in order to realize the Accurate Determining to primary frequency modulation response time.
Embodiment 2.
The present embodiment is substantially the same manner as Example 1, and difference is that speed discrepancy described in the present embodiment is ± 6 r/min.
When speed discrepancy be set to ± 6 r/min time, as a example by rated load 600MW unit, take 5% according to speed governor droop, rated speed is 3000 r/min, speed dead bend is that the parameter of ± 2 r/min sets, and is 4MW by being calculated coefficient of frequency modulation, and primary frequency modulation actuating quantity is 16MW.
Embodiment 3.
The present embodiment is substantially the same manner as Example 1, and difference is that speed discrepancy described in the present embodiment is ± 11 r/min.
When speed discrepancy be set to ± 11 r/min time, as a example by rated load 600MW unit, take 5% according to speed governor droop, rated speed is 3000 r/min, speed dead bend is that the parameter of ± 2 r/min sets, and is 4MW by being calculated coefficient of frequency modulation, and primary frequency modulation actuating quantity is 36MW.
Embodiment 4.
A kind of system determining generating set primary frequency regulation response time described in the present embodiment, including DCS control system, described DCS control system includes primary frequency modulation control unit 1, data acquisition unit 2, data storage cell 3, data analysis unit 4 and the performance element 5 being sequentially connected with, and is provided with interconnective comparator and trigger in wherein said data analysis unit 4.
Under normal operating conditions, the primary frequency modulation control unit 1 of DCS control system, data acquisition unit 2, data storage cell 3, data analysis unit 4 and performance element 5, when primary frequency modulation control unit 1 being inputted the pumping signal that speed discrepancy is ± 4 r/min～± 11r/min, the data message of actual load Q is acquired by data acquisition unit 2, then by data storage cell 3 storage output；This pumping signal is sent to data analysis unit 4 simultaneously, by data analysis unit 4, the timing node that this signal produces is designated as T0, when the comparator in data analysis unit 4 detects actual load Q beyond the bound of ± 0.5%Pe, this timing node is designated as T1 by trigger action, trigger performance element 5 action simultaneously, performance element 5 calculate response time T=T1-T0.
Claims (8)
1. the determination method of a generating set primary frequency regulation response time, it is characterised in that comprise the steps:
Rotating speed official post unit primary frequency modulation unit (1) is set in DCS control system and carries out primary frequency modulation action；
Unit primary frequency modulation test data is gathered by the data acquisition unit (2) of DCS control system；
Export after the test data collected is stored by data storage cell (3), forming curves figure；
Being labeled as moment T0 in the graph in the moment that primary frequency modulation action command sends, the unit actual load that this point is corresponding is Q；After primary frequency modulation action command sends, unit actual load change Q, beyond (Pe is unit rated load) during Q ± 0.5%Pe, is designated as moment T1.
2. the primary frequency modulation response time obtained by: T=T1-T0.
The determination method of a kind of generating set primary frequency regulation response time the most as claimed in claim 1, it is characterised in that described speed discrepancy is ± 4 r/min～between ± 11r/min.
The determination method of a kind of generating set primary frequency regulation response time the most as claimed in claim 1 or 2, it is characterised in that described speed discrepancy is ± 4 r/min.
The determination method of a kind of generating set primary frequency regulation response time the most as claimed in claim 1 or 2, it is characterised in that described speed discrepancy is ± 11 r/min.
The determination method of a kind of generating set primary frequency regulation response time the most as claimed in claim 1 or 2, it is characterised in that described speed discrepancy is ± 6r/min.
7. the system determining generating set primary frequency regulation response time as claimed in claim 1, it is characterized in that: include primary frequency modulation control unit (1), data acquisition unit (2), data storage cell (3), data analysis unit (4) and performance element (1) that DCS control system, described DCS control system include being sequentially connected with.
A kind of system determining generating set primary frequency regulation response time is characterized in that being provided with interconnective comparator and trigger in described data analysis unit (4).
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| CN106646237A (en) * | 2017-02-22 | 2017-05-10 | 广州致远电子股份有限公司 | CAN bus servo motor transient response test method and device |
| CN110187270A (en) * | 2019-04-25 | 2019-08-30 | 河南茵格自动化设备有限公司 | Active primary frequency modulation Online Transaction Processing and method based on WAMS |
| CN111398726A (en) * | 2020-04-30 | 2020-07-10 | 广东电科院能源技术有限责任公司 | Method, system and equipment for testing charging and discharging response time of energy storage frequency modulation system |
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| CN110187270A (en) * | 2019-04-25 | 2019-08-30 | 河南茵格自动化设备有限公司 | Active primary frequency modulation Online Transaction Processing and method based on WAMS |
| CN111398726A (en) * | 2020-04-30 | 2020-07-10 | 广东电科院能源技术有限责任公司 | Method, system and equipment for testing charging and discharging response time of energy storage frequency modulation system |
| CN111398726B (en) * | 2020-04-30 | 2021-12-28 | 南方电网电力科技股份有限公司 | Method, system and equipment for testing charging and discharging response time of energy storage frequency modulation system |
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