CN105140956A - Local control unit processor-based control method for hydropower station unit - Google Patents
Local control unit processor-based control method for hydropower station unit Download PDFInfo
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- CN105140956A CN105140956A CN201510508423.9A CN201510508423A CN105140956A CN 105140956 A CN105140956 A CN 105140956A CN 201510508423 A CN201510508423 A CN 201510508423A CN 105140956 A CN105140956 A CN 105140956A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
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Abstract
The invention discloses a local control unit processor-based control method for a hydropower station unit. A multifunctional electric power meter is connected with a local control unit processor through a communication channel; and the control method comprises the following steps: (1) entering the local control unit processor into a ready condition after electrifying, and entering a standby starting state after power supply is normal; (2) carrying out state self-inspection on the local control unit processor and the communication channel; (3) reading data, namely reading current data of the multifunctional electric power meter into a register of the local control unit processor, and reaching the standard initial state after processing, wherein the current data comprise voltage amplitude condition data, frequency data and phase angle data; (4) carrying out voltage amplitude condition data processing and judging; (5) carrying out frequency data processing and judging; (6) carrying out phase angle data processing and judging; (7) carrying out integrated processing; (8) carrying out outputting; (9) connecting a grid; and (10) finishing actions, and restoring the state into the initial state.
Description
Technical field
The present invention relates to the technical field of automation, particularly relate to the control method of a kind of Hydropower Plant based on existing ground monitoring unit.
Background technology
At present, in 12 planning, require the related request of round Realization intelligence converting equipment to meet State Grid Corporation of China, conventional hydropower factory all will carry out automatic technology transformation.But these hydroelectric plants generally cannot utilize original resource to transform, but need again to buy a whole set of automation equipment and could realize unit automatic quasi-synchronization function.Improvement cost is huge, and original resource be also result in the significant wastage of resource and the heavy damage of environment by directly discarded, brings the loss being difficult to make up to state and collective.
Summary of the invention
For overcoming the defect of prior art, the technical problem to be solved in the present invention there is provided the control method of a kind of Hydropower Plant based on existing ground monitoring unit, which solve a difficult problem for conventional hydropower factory automatic technology transformation, make full use of original resource, realize unit automatic quasi-synchronization function, best effect is obtained with minimum investment, automation integrated level is high, stable, succinct reliable, applying flexible, invests little, easy access and maintenance, for effectively promoting that the construction etc. of digital power grid and digital transformer substation is all of great immediate significance.
Technical scheme of the present invention is: this Hydropower Plant is based on the control method of existing ground monitoring unit, and be connected by communication channel with existing monitoring unit by multifunctional electric meter, this control method comprises the following steps:
(1) monitoring unit enters standby condition after powering on now, after power supply is normal, enter beginning holding state;
(2) monitoring unit, communication channel carry out state self-inspection now;
(3) read in data: the register current data of multifunctional electric meter being read in existing ground monitoring unit, and reach standard initial condition after treatment, this current data packet draws together voltage magnitude condition data, frequency data, phase angle data;
(4) process of voltage magnitude condition data and judgement;
(5) frequency data process and judgement;
(6) phase angle data processing and judgement;
(7) integrated treatment;
(8) output is performed;
(9) grid-connected;
(10) terminate: action is complete, returns to form to initial condition.
The present invention utilizes existing LCU for generator set (LogicalControlUnit, local control unit) Programmable Logic Controller and high-precision multifunctional electric meter (Bitronics, also referred to as hundred surpassing table) form hardware, unit PT (potentialtransformer is gathered by multifunctional electric meter, voltage transformer) and system PT signal, data processing is carried out through Programmable Logic Controller, simultaneous interconnecting, therefore a difficult problem for conventional hydropower factory automatic technology transformation is solved, make full use of original resource, realize unit automatic quasi-synchronization function, best effect is obtained with minimum investment, automation integrated level is high, stable, succinct reliable, applying flexible, invest little, easy access and maintenance, for effectively promoting that the construction etc. of digital power grid and digital transformer substation is all of great immediate significance.
Accompanying drawing explanation
Fig. 1 is the flow chart of Hydropower Plant according to the present invention based on the control method of existing ground monitoring unit.
Embodiment
As shown in Figure 1, this Hydropower Plant is based on the control method of existing ground monitoring unit, and be connected by communication channel with existing monitoring unit by multifunctional electric meter, this control method comprises the following steps:
(1) monitoring unit enters standby condition after powering on now, after power supply is normal, enter beginning holding state;
(2) monitoring unit, communication channel carry out state self-inspection now;
(3) read in data: the register current data of multifunctional electric meter being read in existing ground monitoring unit, and reach standard initial condition after treatment, this current data packet draws together voltage magnitude condition data, frequency data, phase angle data;
(4) process of voltage magnitude condition data and judgement;
(5) frequency data process and judgement;
(6) phase angle data processing and judgement;
(7) integrated treatment;
(8) output is performed;
(9) grid-connected;
(10) terminate: action is complete, returns to form to initial condition.
The present invention utilizes existing LCU for generator set (LogicalControlUnit, local control unit) Programmable Logic Controller and high-precision multifunctional electric meter (Bitronics, also referred to as hundred surpassing table) form hardware, unit PT (potentialtransformer is gathered by multifunctional electric meter, voltage transformer) and system PT signal, data processing is carried out through Programmable Logic Controller, simultaneous interconnecting, therefore a difficult problem for conventional hydropower factory automatic technology transformation is solved, make full use of original resource, realize unit automatic quasi-synchronization function, best effect is obtained with minimum investment, automation integrated level is high, stable, succinct reliable, applying flexible, invest little, easy access and maintenance, for effectively promoting that the construction etc. of digital power grid and digital transformer substation is all of great immediate significance.
Preferably, will be 400635 unit voltage original values with the statement variable of 16 accuracy data registers in table in described step (4); To be 401155 line voltage original values with the statement variable of 16 accuracy data registers in table; Original value corresponding relation: 2047=0Volts; 4095=150.0Volts; Computing formula is: actual value VOLTs=(original value-2047)/2048*150* mutual inductor ratio * 1.732; Judge the difference of unit voltage and system line voltage, when VOLTs difference be greater than 10% or be less than 10% time locking synchronous loop.
Preferably, in described step (5), will be 400657 machine class frequency original values with the statement variable of 16 accuracy data registers in table; To be 400660 mains frequency original values with the statement variable of 16 accuracy data registers in table; The difference of judgement machine class frequency and system frequency, when difference on the frequency is greater than 0.02HZ and is less than 0.15HZ, is frequency interval of acceptance, otherwise by frequency locking.
Preferably, in described step (6), will be 400659 differential seat angle original values with the statement variable of 16 accuracy data registers in table; Angular difference original value corresponding relation: 2047=0 degree, 247=-180 degree, 3847=+180 degree; Computing formula is: angular difference actual value=(original value-2047)/10; Judge unit and system phase angle difference, when phase angle difference be greater than-15 degree and be less than+15 spend time, be angle interval of acceptance, otherwise by angle locking.
Preferably, described step (7) comprises step by step following:
(7.1) reduction of UX system voltage UJ unit voltage and TJJ angle barring condition logic; Original value corresponding relation: 2047=0Volts; 4095=150.0Volts
Computing formula is: VOLTs=(original value-2047)/2048*150* mutual inductor ratio * 1.732, actual value after the virtual voltage reduction after drawing;
Unified reduction is become through reduction of operation with reference to voltage 400658;
(7.2) Δ U voltage difference computing, compare, barring condition logic;
Unit voltage 400635 and line voltage 401155 judge that line voltage 400658 is greater than 401103 more afterwards, then compare 401112 and act on voltage difference blocking relay 000612, and in positive and negative 10% scope of rated voltage, 000612 is 1;
Wherein 401103 corresponding actual values are (3139-2047)/2048*150*2200=175957, for about 80%, 401112 voltage differences of rated voltage are 136/2048*150*138=1374.6, are positive and negative about 10% of rated voltage;
(7.3) machine class frequency FJ and mains frequency FX reduction logic;
To be 400657 machine class frequency original values with the statement variable of 16 accuracy data registers in table;
To be 400660 mains frequency original values with the statement variable of the data register (16 precision) in table;
Original value corresponding relation: 4500 (45.00HZ)----7500 (75.00HZ)
Computing formula is: F (frequency actual value)=original value/100;
The difference of judgement machine class frequency and system frequency, when difference on the frequency is greater than 0.02HZ and is less than 0.15HZ, is frequency interval of acceptance, otherwise by frequency locking;
(7.4) frequency calculation and difference DELTA F are adjusted logic; Machine class frequency 400657 compares with mains frequency 400660, frequency-splitting Δ F is greater than 2, act on frequency difference blocking relay 000613, frequency-splitting 401115 is less than 15, act on frequency difference blocking relay 000614,0.15>=frequency difference >=0.02) time, 000613,000614 is 1;
(7.5) angular frequency rate variance ω arithmetic logic; ω=2 π Δ f, utilizes difference on the frequency 401115*2* π, the pulsation period change that when detection frequency is not identical, two voltage cycles are mutual;
(7.6) leading time Td and slippage angle σ adjusts combined floodgate logic; Angular difference value 401115 poke gives 401118, then passes through: 401118*401104/10 total deposits 401121, and switching angle is δ=ω Δ t, ω=2 π Δ f, and ω is slippage angular frequency, and Δ t is leading time.
Beneficial effect of the present invention is:
1, in Hydropower Unit local control unit, increase multifunctional electric meter (BitrnicMTW), unit and system frequency, voltage are incorporated in unit local control unit.
2, by multifunctional electric meter (BitrnicMTW) image data, seamless link and data sharing is realized by MB+ network and LCU for generator set.
3, according to synchronization system control principle, in unit local control unit LCU, automatic presynchronization now monitoring program is worked out.
4, in factory's substation supervision system, work out the monitoring program same period, by monitor network, realize long-range quasi-synchronization paralleling function.
The above; it is only preferred embodiment of the present invention; not any pro forma restriction is done to the present invention, every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all still belong to the protection range of technical solution of the present invention.
Claims (5)
1. Hydropower Plant is based on a control method for existing ground monitoring unit, it is characterized in that, be connected by communication channel with existing monitoring unit by multifunctional electric meter, this control method comprises the following steps:
(1) monitoring unit enters standby condition after powering on now, after power supply is normal, enter beginning holding state;
(2) monitoring unit, communication channel carry out state self-inspection now;
(3) read in data: the register current data of multifunctional electric meter being read in existing ground monitoring unit, and reach standard initial condition after treatment, this current data packet draws together voltage magnitude condition data, frequency data, phase angle data;
(4) process of voltage magnitude condition data and judgement;
(5) frequency data process and judgement;
(6) phase angle data processing and judgement;
(7) integrated treatment;
(8) output is performed;
(9) grid-connected;
(10) terminate: action is complete, returns to form to initial condition.
2. Hydropower Plant according to claim 1 is based on the control method of existing ground monitoring unit, it is characterized in that, will be 400635 unit voltage original values with the statement variable of 16 accuracy data registers in table in described step (4); To be 401155 line voltage original values with the statement variable of 16 accuracy data registers in table; Original value corresponding relation: 2047=0Volts; 4095=150.0Volts; Computing formula is: actual value VOLTs=(original value-2047)/2048*150* mutual inductor ratio * 1.732; Judge the difference of unit voltage and system line voltage, when VOLTs difference be greater than 10% or be less than 10% time locking synchronous loop.
3. Hydropower Plant according to claim 2 is based on the control method of existing ground monitoring unit, it is characterized in that, in described step (5), will be 400657 machine class frequency original values with the statement variable of 16 accuracy data registers in table; To be 400660 mains frequency original values with the statement variable of 16 accuracy data registers in table; The difference of judgement machine class frequency and system frequency, when difference on the frequency is greater than 0.02HZ and is less than 0.15HZ, is frequency interval of acceptance, otherwise by frequency locking.
4. Hydropower Plant according to claim 3 is based on the control method of existing ground monitoring unit, it is characterized in that, in described step (6), will be 400659 differential seat angle original values with the statement variable of 16 accuracy data registers in table; Angular difference original value corresponding relation: 2047=0 degree, 247=-180 degree, 3847=+180 degree; Computing formula is: angular difference actual value=(original value-2047)/10; Judge unit and system phase angle difference, when phase angle difference be greater than-15 degree and be less than+15 spend time, be angle interval of acceptance, otherwise by angle locking.
5. Hydropower Plant according to claim 4 is based on the control method of existing ground monitoring unit, it is characterized in that, described step (7) comprises step by step following:
(7.1) reduction of UX system voltage UJ unit voltage and TJJ angle barring condition logic;
Original value corresponding relation: 2047=0Volts; 4095=150.0Volts computing formula is: VOLTs=(original value-2047)/2048*150* mutual inductor ratio * 1.732, actual value after the virtual voltage reduction after drawing;
Unified reduction is become through reduction of operation with reference to voltage 400658;
(7.2) Δ U voltage difference computing, compare, barring condition logic;
Unit voltage 400635 and line voltage 401155 judge that line voltage 400658 is greater than 401103 more afterwards, then compare 401112 and act on voltage difference blocking relay 000612, and in positive and negative 10% scope of rated voltage, 000612 is 1;
Wherein 401103 corresponding actual values are (3139-2047)/2048*150*2200=175957, for about 80%, 401112 voltage differences of rated voltage are 136/2048*150*138=1374.6, are positive and negative about 10% of rated voltage;
(7.3) machine class frequency FJ and mains frequency FX reduction logic;
To be 400657 machine class frequency original values with the statement variable of 16 accuracy data registers in table;
To be 400660 mains frequency original values with the statement variable of the data register (16 precision) in table;
Original value corresponding relation: 4500 (45.00HZ)----7500 (75.00HZ)
Computing formula is: F (frequency actual value)=original value/100;
The difference of judgement machine class frequency and system frequency, when difference on the frequency is greater than 0.02HZ and is less than 0.15HZ, is frequency interval of acceptance, otherwise by frequency locking;
(7.4) frequency calculation and difference DELTA F are adjusted logic; Machine class frequency 400657 compares with mains frequency 400660, frequency-splitting Δ F is greater than 2, act on frequency difference blocking relay 000613, frequency-splitting 401115 is less than 15, act on frequency difference blocking relay 000614,0.15>=frequency difference >=0.02) time, 000613,000614 is 1;
(7.5) angular frequency rate variance ω arithmetic logic; ω=2 π Δ f, utilizes difference on the frequency 401115*2* π, the pulsation period change that when detection frequency is not identical, two voltage cycles are mutual;
(7.6) leading time Td and slippage angle σ adjusts combined floodgate logic; Angular difference value 401115 poke gives 401118, then passes through: 401118*401104/10 total deposits 401121, and switching angle is δ=ω Δ t, ω=2 π Δ f, and ω is slippage angular frequency, and Δ t is leading time.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108649619A (en) * | 2018-05-30 | 2018-10-12 | 中国大唐集团科学技术研究院有限公司西北分公司 | Hydroelectric units primary frequency modulation and active adjusting locking control method |
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| CN101369732A (en) * | 2008-10-14 | 2009-02-18 | 华北电网有限公司北京十三陵蓄能电厂 | Multi-parameter automatic presynchronization control method |
| CN101505129A (en) * | 2009-03-06 | 2009-08-12 | 西安理工大学 | Synthetic regulating apparatus for digital hydro-turbo generator set and control method thereof |
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- 2015-08-18 CN CN201510508423.9A patent/CN105140956A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101369732A (en) * | 2008-10-14 | 2009-02-18 | 华北电网有限公司北京十三陵蓄能电厂 | Multi-parameter automatic presynchronization control method |
| CN101505129A (en) * | 2009-03-06 | 2009-08-12 | 西安理工大学 | Synthetic regulating apparatus for digital hydro-turbo generator set and control method thereof |
Non-Patent Citations (2)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108649619A (en) * | 2018-05-30 | 2018-10-12 | 中国大唐集团科学技术研究院有限公司西北分公司 | Hydroelectric units primary frequency modulation and active adjusting locking control method |
| CN108649619B (en) * | 2018-05-30 | 2021-10-15 | 中国大唐集团科学技术研究院有限公司西北分公司 | Primary frequency modulation and active power regulation locking control method for hydroelectric generating set |
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Application publication date: 20151209 |