CN101630845B - Controller of production clearance reactive power compensation device of power supply in distribution systems of small steel rolling workshop - Google Patents
Controller of production clearance reactive power compensation device of power supply in distribution systems of small steel rolling workshop Download PDFInfo
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- CN101630845B CN101630845B CN2009100913269A CN200910091326A CN101630845B CN 101630845 B CN101630845 B CN 101630845B CN 2009100913269 A CN2009100913269 A CN 2009100913269A CN 200910091326 A CN200910091326 A CN 200910091326A CN 101630845 B CN101630845 B CN 101630845B
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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
- Y02E40/10—Flexible AC transmission systems [FACTS]
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The invention relates to a controller of a production clearance reactive power compensation device of power supply and distribution systems of a small steel rolling workshop, which belongs to the field of electrical control. The controller comprises a busbar electricity total current signal collector of the power distribution system, a reactive power detection control board (3) of an upper-level network, a rectifier transformer secondary side TSC device control board (4) of the power supply system, a rectifier transformer secondary side controller (5) of the power supply system and a capacitance compensation switching controller (6). The small steel rolling workshop arranges a high-voltage control cabinet at a 10kV busbar, electrical parameters of the 10kV busbar are collected through a voltage and current detection element and a programmable controller, a mathematical model is used for calculation, and communication with a TSC device hung on the secondary side of a rectifier transformer below each section of the busbar is carried out through a network, thereby emitting a capacitor switching control command, carrying out dynamic compensation on reactive power of a power grid, improving power factor of the power supply system under the working condition that a bar production line does not roll steel, ensuring that the power factor of the power supply system achieves the relevant national standards and effectively saving power energy.
Description
Technical field
The invention belongs to the electrical control field, power supply-distribution system production gap, a kind of small section rolling mill workshop reactive compensator controller particularly is provided; Be applicable to the raising of small section rolling mill enterprise electric power system grid supply qualities such as excellent wire rod and the improvement of power factor, good energy-saving effect is arranged.
Background technology
Harmonic wave and electromagnetic interference, power factor reduce by the three big public hazards that have been listed as electric power system at present.How the high order harmonic component in the filtering power supply-distribution system, improve the power factor of power supply-distribution system, to improving power supply quality and guaranteeing that the power system security economical operation has very positive meaning.
For the less small section rolling mill workshop of electric power system capacity, the dispersion compensation of low pressure, promptly become secondary side and adopt the TSC device in rectification, can reduce the loss of rectifier transformer, power transformer and circuit, the user therefrom obtains energy-saving benefit, reclaiming the cost of investment of compensation arrangement, is that the harmonic wave of user's first-selection absorbs and the reactive power compensation scheme.
But this scheme can not solve in the small section rolling mill Workshop Production processes such as excellent wire rod, production gap in steel rolling, because milling train is not worked or is operated under the unloaded situation, compensating device is not worked, but since other power transformer of workshop also the operation, if there is not reactive power compensator, this moment power supply grid power factor be between 0.75 ~ 0.8, cause waste of electric energy, and do not meet the electricity consumption requirement of local power supply department.
Summary of the invention
The object of the present invention is to provide power supply-distribution system production gap, a kind of small section rolling mill workshop reactive compensator controller, solved in the small section rolling mill Workshop Production processes such as excellent wire rod, production gap in steel rolling, because milling train is not worked or is operated in the low problem of power factor of electric network under the unloaded situation, improve power supply quality, saves energy.
The bar engineering is in the production gap of steel rolling, for example roll change and break tour, milling train is not worked or is operated under the unloaded situation, because power transformer is also in work, for example: the supply-water pump of water system, heating furnace air blast and power consumption equipments such as induced draft fan, oil pumping system, crane, maintenance and illumination all may be in normal operating conditions, if the TSC device is not worked, this moment, the power factor of power supply grid was lower, did not meet the electricity consumption requirement of local power supply department.The present invention can solve the production gap in not steel rolling, because dynamical system is not established compensation arrangement, the problem that power factor of electric network is low.
The present invention includes distribution system bus total voltage total current signals collecting, the higher level nets idle detection control board, rectifier transformer secondary side TSC device.The voltage signal and the current signal of 10kV bus I section, II section bus gathered in the collection of distribution system busbar voltage current signal respectively; Be provided with a high pressure monitoring cabinet at the 10kV bus, adorn two cover higher levels in the high pressure monitoring cabinet and net idle detection control board (being that the higher level nets idle detection control board), control 10kV bus I section respectively, II section bus is with electric power system rectifier transformer secondary side TSC device; The higher level nets and detects the 10kV bus current signal of reactive power plate by collecting, and whether the power factor of reactive power in the analytical calculation electrical network and electrical network reaches 0.92 constantly, if reach 0.92, system normally moves; If do not reach 0.92, according to predefined reactive power switching order, net the idle control board of detection according to result of calculation by the higher level and send reactive power switching signal, the switching order and the capacity of control 5 milling train rectifier transformers of subordinate's net and 1 cold bed rectifier transformer secondary side TSC device are promptly controlled the TSC device and drop into the corresponding compensation capacity as required under different operating modes; Drop into the requirement of signal: only send and the second the tunnel could signal after dropping into signal in the first via, the second tunnel send signal after Third Road could signal by that analogy; When system detects power factor when not up to standard, send the first via and drop into signal, the roughing mill TSC compensation arrangement of receiving first via input signal comes into operation, after the input, if power factor is still not up to standard, system sends the second the tunnel, the Third Road signal by that analogy, reach more than 0.92 until 10kV bus power factor, the higher level nets the TSC device that idle detection control board and each section bus time hung and carries out communication by network in the high pressure monitoring cabinet.
This small section rolling mill workshop is provided with a high pressure monitoring cabinet at the 10kV bus, and the main control unit of high pressure monitoring cabinet is that the higher level nets idle detection control board, goes back to road, Programmable Logic Controller etc. by the A/D signal and forms.
The invention has the advantages that, high pressure monitoring cabinet thought of design is simple, current transformer and a higher level of only needing increase to gather the voltage transformer of line voltage, collection current signal net idle detection control board, utilize existing TSC device well to solve steel rolling gap power factor problem not up to standard, aspect saves energy, have good using value.
Gather the electric parameter of 10kV bus by programmable logic controller (PLC), and calculate, and with each section bus under the TSC device hung of rectifier transformer secondary side carry out communication by network, it is sent the capacitor switching control command, reactive power to electrical network is carried out dynamic compensation, improve the power factor of the electric power system under not steel rolling of the production line of bar operating mode, guarantee that the power factor of electric power system reaches concerned countries standard, saves energy effectively.
Description of drawings
The invention will be further described below in conjunction with the drawings and specific embodiments.
Fig. 1 is power supply-distribution system production gap, a small section rolling mill workshop reactive compensator controller fundamental diagram.Wherein, total current signals collecting 1, total voltage signals collecting 2, higher level net idle detection control board 3, electric power system rectifier transformer secondary side TSC device control board 4, electric power system rectifier transformer secondary side controller 5, capacitance compensation switching control 6.
Fig. 2 is that small section rolling mill workshop power supply-distribution system harmonic wave absorbs and the reactive power compensation composition frame chart.
Fig. 3 is power supply-distribution system production gap, a small section rolling mill workshop reactive compensator controller flow chart.
Embodiment
The main control unit of high pressure monitoring cabinet is made up of idle control board.Idle control board is mainly by gathering the voltage signal and the current signal of 10kV bus I section, II section bus respectively.Voltage detecting: gather 10kV bus PT cabinet (voltage transformer cabinet) 10kV/100V voltage signal, be used for synchro source and detect.
Total current detects: gather 10kV bus high pressure B phase current signal, B phase current mutual inductor secondary side 5A current signal, as transformer primary side total current, the i.e. total current of 10kV bus.
Higher level among Fig. 1 nets and detects the 10kV bus current signal of reactive power plate by collecting, reactive power in the analytical calculation circuit, according to predefined reactive power switching order, net the idle control board of detection according to the result of calculation higher level and send reactive power switching signal.Drop into the requirement of signal: only send and the second the tunnel could signal after dropping into signal in the first via, the second tunnel send signal after Third Road could signal by that analogy.When system detects power factor when not up to standard, send the first via and drop into signal, the roughing mill TSC compensation arrangement of receiving first via input signal comes into operation, after the input, if power factor is still not up to standard, system sends the second the tunnel, the Third Road signal by that analogy, reach more than 0.92 until 10kV bus power factor.
Claims (1)
1. power supply-distribution system production gap, small section rolling mill workshop reactive compensator controller, it is characterized in that, comprise that distribution system bus total voltage signals collecting instrument transformer, total current signals collecting instrument transformer, higher level net idle detection control board, rectifier transformer secondary side TSC device; Distribution system bus total voltage signals collecting instrument transformer, total current signals collecting instrument transformer are gathered the voltage signal and the current signal of 10kV bus I section, II section bus respectively; Be provided with a high pressure monitoring cabinet at the 10kV bus, adorn two cover higher levels in the high pressure monitoring cabinet and net idle detection control board, control 10kV bus I section respectively, II section bus is with electric power system rectifier transformer secondary side TSC device; The higher level nets 10kV bus voltage signal, the current signal of idle detection control board by collecting, and whether the reactive power in the real-time analysis calculating electrical network and the power factor of electrical network reach 0.92, if reach 0.92, system normally moves; If do not reach 0.92, according to predefined reactive power switching order, net idle detection control board according to result of calculation by the higher level and send reactive power switching signal, the switching order and the capacity of control 5 milling train rectifier transformers of subordinate's net and 1 cold bed rectifier transformer secondary side TSC device are promptly controlled the TSC device and drop into the corresponding compensation capacity as required under different operating modes; Drop into the requirement of signal: only send and the second the tunnel could signal after dropping into signal in the first via, the second tunnel send signal after Third Road could signal by that analogy; When netting idle detection control board, the higher level detects power factor when not up to standard, send the first via and drop into signal, the roughing mill TSC compensation arrangement of receiving first via input signal comes into operation, after the input, if power factor is still not up to standard, the higher level nets that idle detection control board sends the second the tunnel, the Third Road signal by that analogy, reach more than 0.92 until 10kV bus power factor, the higher level nets the TSC device that idle detection control board and each section bus time hung and carries out communication by network in the high pressure monitoring cabinet;
The main control unit of high pressure monitoring cabinet is that the higher level nets idle detection control board, is made up of A/D conversion of signals loop, Programmable Logic Controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100913269A CN101630845B (en) | 2009-08-20 | 2009-08-20 | Controller of production clearance reactive power compensation device of power supply in distribution systems of small steel rolling workshop |
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| CN2009100913269A CN101630845B (en) | 2009-08-20 | 2009-08-20 | Controller of production clearance reactive power compensation device of power supply in distribution systems of small steel rolling workshop |
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| CN101630845A CN101630845A (en) | 2010-01-20 |
| CN101630845B true CN101630845B (en) | 2011-11-16 |
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