WO2016143021A1 - 電力系統安定化システム - Google Patents
電力系統安定化システム Download PDFInfo
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- WO2016143021A1 WO2016143021A1 PCT/JP2015/056791 JP2015056791W WO2016143021A1 WO 2016143021 A1 WO2016143021 A1 WO 2016143021A1 JP 2015056791 W JP2015056791 W JP 2015056791W WO 2016143021 A1 WO2016143021 A1 WO 2016143021A1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
- G06Q50/06—Energy or water supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- H02J3/241—The oscillation concerning frequency
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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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
- Y02E40/30—Reactive power compensation
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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
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
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- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
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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
- Y04S10/30—State monitoring, e.g. fault, temperature monitoring, insulator monitoring, corona discharge
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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
- Y04S10/40—Display of information, e.g. of data or controls
Definitions
- the present invention relates to a power system stabilization system that improves the stability of a power system.
- the stability of the power system includes synchronous stability, voltage stability and frequency stability.
- synchronous stability is derived from the fact that the main generator of the power system is a synchronous generator.
- the synchronous generator basically operates synchronously at the same rotational speed although the phase angle of the rotor differs depending on the interconnection position on the power system.
- a disturbance such as a system fault such as a ground fault or a sudden change in the output of the distributed power supply occurs
- the phase angle of the synchronous generator is shaken.
- the phase angle fluctuation spreads and spreads the synchronous generator loses synchronization of its rotational speed, leading to a step out.
- Stabilizers are installed in the power system to attenuate such phase angle oscillations.
- phase angle oscillation is caused by changing the excitation voltage of the generator, changing the output of active power or reactive power in the power storage device, or changing the impedance of the variable impedance type series capacitor. Can be attenuated to improve the stability of the power system.
- the control device that controls the stabilization device detects a signal that fluctuates according to phase angle fluctuation, for example, line power flow or frequency deviation, and outputs a control signal by applying gain or phase compensation to the signal.
- the stabilization action according to the control parameter such as the magnitude of the gain and the time constant of phase compensation differs depending on the device state of the stabilization device to be controlled and the power flow state of the power system.
- Patent Document 1 can suppress phase angle fluctuation in a wide frequency range by changing the rate of addition of control operation amounts which are outputs of a plurality of control means.
- this technology controls a single stabilization device, an effect of improving the stability of the power system can not be obtained by control in which a plurality of stabilization devices are combined.
- the operator of the transmission system may procure the adjustment power supplied by the stabilization equipment from the operator of the stabilization equipment through the power exchange market, but to equalize the procurement price, stabilization may be required. It is necessary to have a price determination means according to the magnitude of the action.
- the present invention has been made in view of the above problems, and its object is to index the stabilization action according to the equipment state of the stabilization equipment and the power flow state of the electric power system, and prioritize the large stabilization equipment of stabilization action. It is to improve the stability of the power system by procuring adjustment power and controlling the stabilization device according to the magnitude of the stabilization action.
- an electric power system stabilization system for operating a stabilization apparatus linked to an electric power system, the apparatus state database recording the apparatus state of the stabilization apparatus as a database;
- the apparatus state database recording the apparatus state of the stabilization apparatus as a database;
- two or more device state databases including the device state database are provided;
- Stabilization index calculated with the stabilization function index calculation function that indexes the stabilization function of the stabilization device based on one or both of the system configurations, and the stabilization function index obtained by the stabilization function index calculation function
- a display means is provided for displaying or outputting in contrast to the contrast element included in the system configuration.
- an electric power system stabilization system for operating a stabilization device linked to an electric power system, which is an equipment state of the stabilization device, a power flow state of the electric power system, and a system configuration of the electric power system.
- the stabilization action index calculation function to index the stabilization action of the stabilization device, the stabilization action index obtained by the stabilization action index calculation function, the input device state, tidal current state, and system configuration, It has an output unit that displays numerical values or graphs.
- the stabilization action according to the equipment state of the stabilization equipment and the power flow state of the power system is indexed, and the adjustment power is procured by giving priority to the large stabilization equipment with stabilization action, and the stabilization equipment concerned
- the stability of the power system can be improved by controlling the power supply according to the magnitude of the stabilization action.
- FIG. 1 is a diagram showing a power system and constituent devices of a system stabilization system.
- the generator 103 the load 104, the stabilizing devices 105 (105 a, 105 b, 105 c), the measuring device 106 and the like are connected to the power system 102.
- the stabilizing device 105 is, for example, a synchronous generator provided with a PSS (Power System Stabilizer), a distributed power source or power storage device capable of output adjustment, a STATCOM (Static Synchronous Compensator), a series capacitor, or the like.
- PSS Power System Stabilizer
- STATCOM Static Synchronous Compensator
- a gas turbine generator is also included, and the concept of STATCOM includes SVC (Static Var Compensater) and the like.
- SVC Static Var Compensater
- a system stabilization system operator there are two types that possess and operate these stabilization devices 105, a system stabilization system operator and a stabilization device operator.
- 105 a is a stabilizing device operated by the system stabilization system operator. Therefore, the system stabilization system operator can execute the synchronization stability improvement measure of the power system by the operation of the stabilization device 105a without the need of obtaining the permission of anyone at his / her discretion.
- the stabilizing devices 105b and 105C are devices related to possession and operation of the stabilizing device operator.
- the stabilization device 105b is compared to the procurement price presented to the power transaction market by the system stabilization system operator. , And the bidding for the stabilization equipment operator was established, and the adjustment power was procured.
- Stabilization device 105 c is one of the stabilization devices whose adjustment power is traded in power exchange market 107, for which a bid has not been established.
- the stabilizing devices 105 that can execute the system stability improvement measure of the power system are 105a and 105b, and the control amount that can contribute to the improvement of the stability is stability of these. Determined by the conversion devices 105a and 105b. The control amount that can contribute to the improvement in stability will change with time, reflecting the transaction in the power exchange market 107.
- the system stabilization system 101 monitors the device state of the stabilization device 105 and the power flow state of the electric power system 102 measured by the measuring device 106 through the communication line 108, and among the stabilization devices 105, the operable stabilization is possible.
- the control parameters are output to the conversion devices 105a and 105b.
- the display device 109 (109a, 109b) displays the stabilizing action of the stabilizing device 105 numerically or graphically.
- the display device 109a is a display device used by the system stabilization system operator to confirm the stabilization effect
- the display device 109b is confirmation of the stabilization effect by stakeholders (stakeholders) in the power transaction market such as the stabilization device operator Display device used in
- the controller device 110 provides an operator of the system stabilization system with an interface for correcting control parameters to be output to the stabilization device 105.
- FIG. 2 is a functional block diagram of the system stabilization system 101. As shown in FIG. In FIG. 2, various processing functions (203 to 210) executed in the system stabilization system 101 and a database DB which holds data used for these processes are described.
- the device state database DB1 is a database in which the device state of the stabilizing device 105 is recorded.
- the device state includes the connection position of the stabilization device, the dynamically changing output capacity, the response speed, and the like.
- the information source of the device state database DB1 is, for example, a designated value registered through the database registration function 203 regarding the interconnection position, and is a measured value obtained by monitoring of the stabilization device 105 regarding the output capacity and the response speed. These indicate the current device status, and also indicate the past device status by accumulating. Alternatively, future device states can also be indicated by registering predicted values by simulation assuming a future via the database registration function 203 instead of measurement values.
- the power flow state database DB2 is a database in which the power flow state of the power system 102 is recorded.
- the power flow state includes the active power and reactive power flowing through the line of the power system, the line voltage, the phase angle, and the amplitude, period, and generation position of the phase angle fluctuation.
- the information source of the power flow state database DB2 is a measured value obtained by monitoring the power system 102. These show the current flow condition and also show the past flow condition by accumulating. Alternatively, instead of the measured value, by registering the predicted value by simulation assuming the future via the database registration function 203, it is also possible to indicate the future power flow state.
- the grid configuration database DB3 is a database in which the grid configuration of the power grid 102 is recorded.
- the system configuration includes system topology, line impedance, load capacity, power supply capacity, generator constant, and the like.
- the information source of the system configuration database DB2 is a designated value registered through the database registration function 203. These show the present system configuration, and also show the past system configuration by accumulating. Alternatively, by registering designated values assuming the future via the database registration function 203, it is possible to indicate the future system configuration.
- the stabilizing operation index calculation function 204 attenuates the phase angle fluctuation Function to index the stabilization effect as a numerical value to improve synchronization stability.
- An example of the stabilization action index is a change in attenuation rate of phase angle fluctuation with respect to a change in unit output of the stabilization device 105.
- the stabilization action index may be focused on the output capacity, response speed, and interconnection position of the stabilization device 105 stored in the device state database DB1.
- the stabilizing device 105 having a large output capacity can obtain a high stabilizing action regardless of the magnitude of the phase angle fluctuation.
- the stabilization device 105 with small output capacity can obtain high stabilization action against small-scale phase angle oscillation, it has only low stabilization action due to output saturation against large-scale phase angle oscillation. I can not get it.
- the high response speed stabilization device 105 can obtain a high stabilization action regardless of the phase angle fluctuation period.
- the stabilization device 105 which has a slow response speed, can obtain a high stabilization effect on long-period phase angle oscillations, but has only a low stabilization effect on short-period phase angle oscillations due to the output delay. I can not get it.
- the output of the stabilization device acts on the phase angle of the synchronous generator connected to each place through the interconnection flow, but the connection position of the stabilization device and The closer the phase angle oscillation occurs, the greater the stabilization effect.
- FIG. 3 it is assumed that two synchronous generators 103A and 103B are connected via an interconnection line 304, and the stabilizing device 105 is installed in the vicinity of the synchronous generator 103A.
- the change of the output of the stabilizing device 105 immediately acts as the change of the electric torque, and the phase angle can be changed.
- a change in interconnection line flow derived from the stabilization device output acts as a change in electric torque to change the phase angle.
- the phase angle has a delay element due to mechanical inertia with respect to the electric torque, and the magnitude of the tidal current of the interconnection line 304 is proportional to the difference of the phase angles at both ends of the interconnection line.
- the electric torque acting on the synchronous generator 103B has a delay element due to mechanical inertia. Since the delay element causes a reduction in gain in control, the stabilizing action by the stabilizing device 105 is lower in the synchronous generator 103B than in the synchronous generator 103A.
- the stabilizing action of the stabilizing device 105 linked to the electric power system is not uniform to the synchronous generator, and the output capacity C1i of the i-th stabilizing device 305, the response speed C2i, the interconnection
- the position C3i differs depending on the combination of the amplitude P1k, the period P2k, and the occurrence position P3k of the phase angle fluctuation k.
- the subscript i is a number assigned to the stabilizing device 305.
- the suffix k is a number that distinguishes phase angle oscillation, for example, in the oscillation mode, and the discrimination of the phase angle oscillation is performed by the Prony analysis using, for example, the measurement value of PMU (Phasor Measurement Unit) as the measuring device 106. It is known to be possible.
- PMU Phase Measurement Unit
- the output capacity C1i, the response speed C2i, and the interconnection position C3i are data held in the device state database DB1
- the interconnection position C3i and the generation position P3k are data recorded in the system configuration database DB3.
- the interconnection position C3i and the generation position P3k are indicated by the node numbers of the system topology recorded in the system configuration database DB3, and the electrical distance between the two is calculated by the line impedance recorded in the system configuration database DB3.
- the stabilization action index S (i, k) output from the stabilization action index calculation function 204 is a function of these, and is described as in equation (1).
- S (i, k) f (C1i, C2i, C3i, P1k, P2k, P3k) (1)
- the function f in the equation (1) maps the device state and the tidal current state to the stabilization action index stabilization action index S (i, k) by the following function form.
- the function form 1 is to be proportional to the product of the output capacity C1i of the stabilization device and the amplitude P1k of the phase angle fluctuation.
- the function form 2 is proportional to the product of the response speed C2i of the stabilization device and the reciprocal of the period P2k of the phase angle fluctuation.
- the function form 3 is proportional to the reciprocal of the electrical distance between the connection position C3i of the stabilization device and the generation position P3i of the phase angle fluctuation.
- a larger stabilization action index is calculated.
- Such a function output can also be generated simply by formulating the function form 1 to the function form 3 in advance, and can also be simply generated, and also the device state of the stabilization device, the power flow state of the power system, and the power system It is also possible to generate in detail by transient analysis based on the system configuration of
- the above equation (1) essentially includes an apparatus state database recording the apparatus state of the stabilization apparatus and a system configuration database recording the system configuration of the electric power system, and based on the apparatus state and the system configuration It can be said that the stabilization action is an index.
- S (i, k) is obtained as the stabilization action index, but this stabilization action index can be any stabilization action index depending on the combination of data stored in the three databases. It is possible to The stability index may be obtained from the device state data and the power flow state data, or may be obtained from the device state data and the system configuration data. Furthermore, the stabilization index may be obtained by combining three data. In short, any number of different data may be collected as one data indicating the stabilizing action.
- the procurement price calculation function 205 of FIG. 2 is a function of calculating the procurement price of the adjustment power using the stabilization action index S (i, k) of the stabilization device 105. If the procurement price is determined based on the stabilization action for a single phase angle oscillation k, the procurement price V (i, k) of the i-th stabilization device 105 is stabilized as in equation (2). It is calculated by the function g of the action index S (i, k).
- the function g is, for example, a monotonically increasing function such as a linear expression of the stabilization action index S (i, k), but the function form is not limited.
- the procurement price does not take into consideration the wide area stabilization effect on the power system. Therefore, the procurement price Vi based on the stabilizing action on the plurality of phase angle oscillations k is calculated by the equation (3) which is a linear combination of the equation (2).
- V'i Vstd ⁇ (Vi / ⁇ j (Vj)) (4)
- the stabilization action index calculation function 204 uses the current device state (device state database DB1), power flow state (power flow state database DB2), and system configuration (system configuration database DB3) to perform the stabilization action index S ( By calculating i, k), the procurement price calculation function 205 calculates a procurement price based on the current performance.
- the procurement price calculation function 205 obtains the procurement price based on the past history. Calculate
- the procurement price calculation function 205 may calculate the procurement price based on the future assumption by using the stabilization action index calculation function 204 to calculate the stabilization action index using the device state, the power flow state, and the system configuration assumed in the future. Calculate
- the adjustment power procurement function 206 of FIG. 2 is a function of procuring adjustment power from the operator of the stabilization device 105 by presenting the procurement price V′i calculated by the procurement price calculation function 205 to the power transaction market 107.
- the power exchange market 107 itself is a mechanism that has already been put to practical use, and the explanation thereof is omitted.
- the procurement price calculated based on the stabilization action is used for trading.
- the adjustment power supply function 206 preferentially acquires the adjustment power with the stabilization device 105 having a high stabilization function given priority.
- the procurement price of the stabilization device 105a owned by the system stabilization system operator is also included in the calculation as a virtual value for normalization in (4), the adjustment power by the adjustment power procurement function 206 It is not necessary to present the procurement price of the stabilization device 105 a to the power exchange market in
- the control parameter calculation function 207 of FIG. 2 is a function of calculating control parameters of the stabilization device 105 a operated by the system stabilization system operator and the stabilization device 105 b which has obtained the adjustment power in the power transaction market 107.
- control parameters of the stabilizing device 105 there are a plurality of types of control parameters of the stabilizing device 105, the control gain for the line power flow deviation and the frequency deviation which are input signals of the stabilizing device 105 will be described as an example.
- the output generated by the stabilizing device 105 is proportional to the magnitude of the control gain with respect to the line power flow deviation and the frequency deviation. Therefore, by calculating the control gain based on the stabilization action index S (i, k), the phase angle generated in the electric power system can be used more positively by using the stabilization device 105 having a large stabilization action more positively. Dampen upset.
- the calculation method of the control gain by the control parameter calculation function 207 is described by a function of the stabilization operation index S (i, k), similarly to the calculation method of the procurement price by the procurement price calculation function 205.
- the control gain G'i of the i-th stabilizing device 105 is expressed by the equations (5) and (6).
- the function h is, for example, a monotonically increasing function such as a linear expression of the stabilization action index S (i, k), but the function form is not limited.
- the control parameter setting function 208 in FIG. 2 sets the control parameter calculated by the control parameter calculation function 207 in the stabilizing devices 105 a and 105 b that can be controlled via the communication line 108.
- the control parameter calculation function 207 and the control parameter setting function 208 calculate and set the gain of the stabilization device 105 as described above, and the stabilization operation is performed while increasing the output of the stabilization device 105 having a large stabilization effect. By reducing the output of the small stabilization device 105, the total output of the stabilization device 105 required to attenuate phase angle oscillations is kept low.
- the stabilization action index disclosure function 209 shown in FIG. 2 is a state of the stabilization action index S (i, k), which is the basis of the procurement price that the adjustable procurement function 206 presents to the power exchange market 107.
- the power flow state of the power system and is a function for disclosing and explaining, and uses the display device 109b. As described in the equation (3), since the device state and the flow state consist of a plurality of elements, presenting them at one time is not appropriate in view of visibility.
- the stabilization action index disclosing function 209 simplifies the device state and the power flow state, for example, as shown in FIGS. 4 to 9, and visualizes it in association with the stabilization action index S (i, k).
- FIG. 4 is a scatterplot graph in which a plurality of stabilization devices are plotted on two axes of output capacity and stabilization action index.
- the stabilization action index S (i, k) is an average value of the stabilization action indices related to a plurality of phase angle oscillations calculated by the equation (3).
- FIG. 5 is also a scatter plot plotted on two axes of the response speed and the stabilization index.
- FIG. 4 and FIG. 5 do not individually specify the device state contributing to the stabilization action, for example, by visualizing FIG. 4 and FIG. 5 side by side, stabilization with respect to output capacity and response speed It is possible to show the changing tendency of the action index and quantitatively show the stabilizing device having a high stabilizing action.
- FIG. 6 is a scatter diagram in which a plurality of stabilizing devices are plotted with respect to an axis obtained by linearly combining the output capacity and the response speed and an axis of the stabilizing action index, and the stabilizing devices having high stabilizing action are It can be shown quantitatively after aggregating the elements of the state.
- the selection of stabilization equipment to be used for stabilization control should be selected as one having a high stabilization action indicator. Also, since there are devices belonging to the system stabilization system operator and devices belonging to the stabilization device operator, each stabilization device is displayed including the owner's distinction in the display of the stabilization device. Is good. If there is no big difference in the stabilization action index between the one belonging to the system stabilization system operator and the one belonging to the stabilization device operator, there is no need to run for procurement by force, and it is possible to use the self-equipped equipment. It is possible to improve the economic efficiency by taking action.
- the stabilizing devices in similar plot coordinates are collectively shown by clustering etc., and a part thereof is enlarged as shown in FIG. Stabilizers contained within can be compared and shown.
- the horizontal axis indicates the electrical distance between the connection position of the stabilization device and the generation position of the phase angle fluctuation
- the vertical axis indicates the phase angle fluctuation cycle
- the stabilization of a certain stabilization device It is the graph of the bubble chart which showed the chemical action index with the size of the circle. This graph can quantitatively show what kind of phase angle fluctuation the stabilization device has with a high stabilization action index.
- FIG. 8 is a graph relating to a single stabilization device, but it is also possible to show the stabilization action indicators of a plurality of stabilization devices in a color-coded manner as shown in FIG.
- FIG. 4 to FIG. 9 the display examples of the stabilization action index have been shown from FIG. 4 to FIG. 9 above, these are each displayed in actual operation, and the display example to be noted most is considered in view of the system condition at that time. It is good to select it and use it for subsequent judgments.
- FIGS. 4 and 6 attention should be paid to FIGS. 4 and 6 from the viewpoint of capacity emphasis, and when a feature with quick vibration is observed as a system state
- FIG. 5 and FIG. Furthermore, if it can be seen that vibration is local as a system state, attention should be paid to FIGS. 8 and 9 from the viewpoint of electrical distance.
- FIGS. 8 and 9 the viewpoint of electrical distance. It should be noted that depending on the state of the system, which figure should be focused on may be left to the judgment of the operator, or the display screen selected by the judgment of the computer is switched to be displayed and forced to be recognized by the operator It may be
- a device status database recording the device status of the stabilization device
- a power flow status database recording the power flow status of the power system
- a system configuration database recording the system configuration of the power system
- the stabilization action of the stabilization equipment will be indexed based on the equipment status, power flow status, and system configuration, but at this time the current situation status can be obtained by indexing based on the equipment status and power flow status. It can be an online display that accurately reflects.
- the stabilization effect of the stabilization device as an index based on the device state and the system configuration, it is possible to make a display focusing on electrical distance. For this reason, it is preferable that two or more types of equipment state, flow state, and system configuration data be used in combination as appropriate.
- stabilization device for example, assuming that gas turbine generators, SVCs, and distributed power sources are available as stabilization devices, SVCs capable of high-speed response if high-speed system oscillation occurs. For large-scale oscillation, a large capacity gas turbine generator is suitable. For high-speed, large-scale oscillation, it is recommended to mobilize gas turbine generators, SVCs, and distributed power supplies.
- the stabilization action index for each stabilization device is displayed, but only the stabilization action index is not displayed, and other elements are not displayed.
- other elements to be compared in this case which are displayed in two dimensions or three dimensions together, are referred to as contrast elements.
- the comparison elements are the output capacitances of FIGS. 4, 7 and 10, the response speed of FIG. 5, the output capacitance of FIG. 6, the response speed, and the electrical distances of FIGS.
- These contrast elements are elements included in the device status, power flow status, and system configuration, and the output capacity and response speed are data in the device status stored in the device status database DB1, and the electrical distance is the system configuration Data in the system configuration held in the database DB3.
- control parameter correction function 210 is a function for the operator of the system stabilization system 101 to correct the control parameter calculated automatically by the control parameter calculation function 207, and the display device 109 a and the operation device 110. And.
- a correction term ⁇ S is added to the stabilization action index for a specific stabilization device on a graph, and S (i, From k) to S (i, k) + ⁇ S. Then, the control gain calculated by the equations (5) and (6) is also corrected, and the operator can correct the output of the stabilization device.
- the control gain instead of plotting the stabilization action index as the axis, the control gain may be plotted as the axis, and the control gain may be directly corrected.
- FIG. 11 is a process flow diagram of the system stabilization system 101.
- the first processing step S1101 in FIG. 11 is data acquisition processing, and each data of the device status, power flow status, and grid configuration is read out from the device status database DB1, the power flow status database DB2, and the system configuration database DB3.
- the next process step S1102S is a first loop process for the stabilization device that is repeatedly executed for all the stabilization devices 105 targeted for the process step between the process steps S1102S and S1102E.
- the next processing step S1103S is loop processing relating to phase angle fluctuation which is repeatedly executed for all of the plurality of phase angle fluctuations targeted for the processing step between the processing steps S1103S and S1103E.
- Process step S1104 is a process of calculating the stabilization action index S (i, k) by the stabilization action index calculation function 204, and all the stabilization devices 105 to be subjected to the first loop processing regarding the stabilization device and the phase angle A stabilization action index S (i, k) is calculated for the phase angle oscillation of the loop processing target for oscillation. By the processing up to this point, the stabilization action index S (i, k) at all phase angle oscillations is calculated for all stabilization devices.
- processing step S1105 is the calculation of the procurement price of the adjustment power by the procurement price calculation function 205, and the procurement price is calculated for the stabilization device 105 targeted for the first loop processing.
- processing step S1106 is the disclosure of the stabilization action indicator S (i, k) by the stabilization action disclosure function 209, it can be omitted according to the necessity of the disclosure.
- the processing step S1107 is the procurement of the adjustment power by the adjustment power procurement function 206, and the procurement price of the stabilization device 105 calculated by the procurement price calculation function 205 is presented to the power transaction market, and adjustment is made by the operator of the stabilization device who has bid. Raise power.
- the processing step S1108 is a second loop process for the stabilization device which is repeatedly executed for all the stabilization devices 105 targeted for the processing step between the processing steps S1108S and S1108E.
- the stabilization device 105 a owned by the system operator and the stabilization device 105 b that has acquired the adjustment power in the power exchange market 107 are targeted.
- Process step S1109 is the calculation of the control parameter by the control parameter calculation function 207, and the control parameter is calculated regarding the stabilization device of the second loop processing target regarding the stabilization device.
- processing step S1110 is the correction of the control parameter by the control parameter operating function 210, it can be omitted depending on the necessity of the correction.
- the processing step S1111 is setting of control parameters by the control parameter setting function, and sends the control parameters to the stabilizing devices 105a and 105b through the communication line 108.
- the device state database DB1 of FIG. 2 the power flow state database DB2, the system configuration database DB3, the stabilization action index calculation function 204, and the procurement price calculation function 205
- the stabilization action according to the equipment state of the stabilization equipment or the power flow state of the power system is indexed, and the large stabilization equipment of the stabilization action is prioritized. Then, it has the effect of raising coordination power and improving the stability of the power system.
- the stability of the power system is improved by controlling the stabilization device according to the magnitude of the stabilization action.
- the stabilization action index disclosure function 209 and the control parameter correction function 210 disclosure of the stabilization action index to stakeholders such as the stabilization device operator, and system stabilization It enables correction of control parameters by the system operator.
- 101 system stabilization system
- 102 power system
- 103 generator
- 104 load
- 105 stabilization device
- 106 measuring device
- 107 power exchange market
- 108 communication line
- 109 display device
- 110 Controller
- DB1 Equipment status database
- DB2 Power flow status database
- DB3 System configuration database
- 204 Stabilizing function index calculation function
- 205 Procurement price calculation function
- 206 Adjustment power procurement function
- 207 Control parameter calculation function
- 208 control parameter setting function
- 209 stabilization action index disclosure function
- 210 control parameter correction function
- 203 database registration function
- 105 stabilization device
- 103A synchronous generator
- 103B synchronous generator
- 304 continuous Line
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Abstract
Description
[数1]
S(i、k)=f(C1i、C2i、C3i、P1k、P2k、P3k)・・・(1)
(1)式の関数fは一例として、次のような関数形によって、機器状態と潮流状態を安定化作用指標安定化作用指標S(i、k)に写像する。関数形1は、安定化機器の出力容量C1iと、位相角動揺の振幅P1kとの積に比例することである。関数形2は、安定化機器の応答速度C2iと、位相角動揺の周期P2kの逆数との積に比例することである。関数形3は、安定化機器の連系位置C3iと位相角動揺の発生位置P3iとの電気的距離の逆数に比例することである。
[数2]
V(i、k)=g(S(i、k)) ・・・(2)
一方、実際の電力系統では複数の位相角動揺kが同時に発生していることがあるため、(2)式では電力系統に対する広域的な安定化作用を考慮した調達価格とはならない。そこで、(2)式の線形合成である(3)式によって、複数の位相角動揺kに対する安定化作用に基づく調達価格Viを算出する。(3)式でNは電力系統に発生している位相角動揺kの数(k=1、2、、、、、 、N)である。
[数3]
Vi=Σk(g(S(i、k))) ・・・(3)
ここで、(3)式で算出された調達価格Viは、安定化機器105ごとの調達価格の大小を相対的に示すものだが、たとえば(4)式のように正規化して、電力取引市場107における基準価格Vstdを安定化作用の大小に応じて重み付けした調達価格V’iとすることもできる。なお(4)式で、jは電力系統に連系された安定化機器105の数(j=1、2、、、、、 、M)である。
[数4]
V’i=Vstd×(Vi/Σj(Vj)) ・・・(4)
このように、安定化作用指標算出機能204が、現在の機器状態(機器状態データベースDB1)、潮流状態(潮流状態データベースDB2)、系統構成(系統構成データベースDB3)を用いて安定化作用指標S(i、k)を算出することで、調達価格算出機能205は現在の実績に基づいた調達価格を算出する。
[数5]
Gi=Σk(h(S(i、k))) ・・・(5)
[数6]
G’i=Gstdi×(Gi/Σj(Gj)) ・・・(6)
あるいは、系統安定化システム運用者が運用する安定化機器105aと、電力取引市場107で調整力を調達した安定化機器105bについて、それぞれ補正係数Ga、Gbを(7)、(8)式のように乗じて、たとえばGa>Gbとすることで、安定化機器105aを安定化機器105bより優先して活用する。
[数7]
G’i=Ga×Gstdi×(Gi/Σj(Gj)) ・・(7)
[数7]
G’i=Gb×Gstdi×(Gi/Σj(Gj)) ・・・(8)
図2の制御パラメータ設定機能208は、制御パラメータ算出機能207が算出した制御パラメータを、通信回線108を介して制御可能な安定化機器105a、105bに設定する。制御パラメータ算出機能207と制御パラメータ設定機能208は、以上のように安定化機器105のゲインを算出して設定し、安定化作用が大きい安定化機器105の出力を増大させつつ、安定化作用が小さい安定化機器105の出力を減少させることで、位相角動揺を減衰させるのに必要な安定化機器105の合計出力を低く抑える。
103B:同期発電機,304:連系線
Claims (14)
- 電力系統に連系された安定化機器を操作するための電力系統安定化システムであって、
データベースとして、安定化機器の機器状態を記録した機器状態データベースと、電力系統の潮流状態を記録した潮流状態データベースと、電力系統の系統構成を記録した系統構成データベースのうち、前記機器状態データベースを含む2つ以上の機器状態データベースを備え、
機器状態と、潮流状態と系統構成の一方または双方とに基づいて前記安定化機器の安定化作用を指標化する安定化作用指標算出機能と、該安定化作用指標算出機能で求めた安定化作用指標を、機器状態、潮流状態、系統構成に含まれる対比要素との対比で表示または出力する表示手段を備えていることを特徴とする電力系統安定化システム。 - 請求項1に記載の電力系統安定化システムであって、
前記対比要素は、安定化機器の出力容量、応答速度、および安定化機器の連系位置と位相角動揺の発生位置との電気的距離であって、1つ以上の対比要素を一方の軸とする平面上に前記安定化作用指標とともに表示されることを特徴とする電力系統安定化システム。 - 請求項1または請求項2に記載の電力系統安定化システムであって、
安定化機器の出力である調整力の調達価格を安定化作用指標に基づいて算出する調達価格算出機能と、調達価格に基づいて電力取引市場から調整力を調達する調整力調達機能とを備えることを特徴とする電力系統安定化システム。 - 請求項1から請求項3のいずれか1項に記載の電力系統安定化システムであって、
安定化機器の制御パラメータを安定化作用指標に基づいて算出する制御パラメータ算出機能と、制御パラメータを安定化機器に設定する制御パラメータ設定機能とを備えることを特徴とする電力系統安定化システム。 - 請求項4に記載の電力系統安定化システムであって、
制御パラメータ算出機能が、電力取引市場から調達した調整力の供給源である安定化機器の制御パラメータを算出することを特徴とする電力系統安定化システム。 - 請求項4に記載の電力系統安定化システムであって、
制御パラメータ算出機能が、電力取引市場から調達した調整力の供給源である安定化機器と、電力取引市場を介さずに運用している調整力の供給源である安定化機器との制御パラメータを算出することを特徴とする電力系統安定化システム。 - 請求項1から請求項6のいずれか1項に記載の電力系統安定化システムであって、
安定化作用指標算出機能は、同期安定度、電圧安定度、周波数安定度のいずれかに関する安定化作用を指標化することを特徴とする電力系統安定化システム。 - 請求項1から請求項7のいずれか1項に記載の電力系統安定化システムであって、
安定化作用指標算出機能は、機器状態データベースに記録された安定化機器の出力容量と応答速度とに基づいて、電力系統の同期安定度に関する安定化作用を指標化することを特徴とする電力系統安定化システム。 - 請求項1から請求項8のいずれか1項に記載の電力系統安定化システムであって、
安定化作用指標算出機能は、機器状態データベースに記録された安定化機器の出力容量と応答速度と連系位置とに基づいて、電力系統の同期安定度に関する安定化作用を指標化することを特徴とする電力系統安定化システム。 - 請求項1から請求項9のいずれか1項に記載の電力系統安定化システムであって、
安定化作用指標算出機能は、潮流状態データベースに記録された位相角動揺の振幅と周期とに基づいて、電力系統の同期安定度に関する安定化作用を指標化することを特徴とする電力系統安定化システム。 - 電力系統に連系された安定化機器を操作するための電力系統安定化システムであって、
安定化機器の機器状態と、電力系統の潮流状態と、電力系統の系統構成を得て、前記安定化機器の安定化作用を指標化する安定化作用指標算出機能と、該安定化作用指標算出機能で求めた安定化作用指標と、入力した前記機器状態、潮流状態、系統構成を、数値もしくはグラフで表示する出力部を備えることを特徴とする電力系統安定化システム。 - 請求項11に記載の電力系統安定化システムであって、
前記出力部は、前記機器状態と潮流状態と系統構成と安定化作用指標との一部乃至全ての要素、あるいは射影変換した要素、を表示することを特徴とする電力系統安定化システム。 - 請求項11に記載の電力系統安定化システムであって、
前記出力部は、前記機器状態と潮流状態と系統構成と安定化作用指標とを、複数の安定化機器について集約した値を表示することを特徴とする電力系統安定化システム。 - 請求項11から請求項13のいずれか1項に記載の電力系統安定化システムであって、
電力系統からの入力信号に対する安定化機器の制御ゲインの大きさを安定化作用指標に基づいて算出することを特徴とする電力系統安定化システム。
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- 2015-03-09 US US15/554,273 patent/US10389127B2/en not_active Expired - Fee Related
- 2015-03-09 JP JP2017504341A patent/JP6316500B2/ja not_active Expired - Fee Related
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Cited By (11)
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CN106786560A (zh) * | 2017-02-14 | 2017-05-31 | 中国电力科学研究院 | 一种电力系统稳定特征自动提取方法及装置 |
CN106786560B (zh) * | 2017-02-14 | 2021-04-30 | 中国电力科学研究院 | 一种电力系统稳定特征自动提取方法及装置 |
JP2020036482A (ja) * | 2018-08-30 | 2020-03-05 | 株式会社日立製作所 | 市場対応信頼度管理装置及び市場対応信頼度管理方法 |
WO2020044636A1 (ja) * | 2018-08-30 | 2020-03-05 | 株式会社日立製作所 | 市場対応信頼度管理装置及び市場対応信頼度管理方法 |
JP7014691B2 (ja) | 2018-08-30 | 2022-02-01 | 株式会社日立製作所 | 市場対応信頼度管理装置及び市場対応信頼度管理方法 |
JPWO2021024322A1 (ja) * | 2019-08-02 | 2021-02-11 | ||
WO2021024554A1 (ja) * | 2019-08-02 | 2021-02-11 | 株式会社日立製作所 | 調整力調達装置および調整力調達方法 |
WO2021024322A1 (ja) * | 2019-08-02 | 2021-02-11 | 東芝三菱電機産業システム株式会社 | 再生可能エネルギー発電プラントシステムおよびプラント制御装置 |
JP2021027658A (ja) * | 2019-08-02 | 2021-02-22 | 株式会社日立製作所 | 調整力調達装置および調整力調達方法 |
JP7193427B2 (ja) | 2019-08-02 | 2022-12-20 | 株式会社日立製作所 | 調整力調達装置および調整力調達方法 |
JP7226560B2 (ja) | 2019-08-02 | 2023-02-21 | 東芝三菱電機産業システム株式会社 | 再生可能エネルギー発電プラントシステムおよびプラント制御装置 |
Also Published As
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JPWO2016143021A1 (ja) | 2017-10-19 |
JP6316500B2 (ja) | 2018-04-25 |
US20180054058A1 (en) | 2018-02-22 |
US10389127B2 (en) | 2019-08-20 |
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