CN112381401A - Power market power generation dispatching plan safety checking method - Google Patents
Power market power generation dispatching plan safety checking method Download PDFInfo
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Abstract
The invention discloses a safety checking method for a power generation dispatching plan in a power market. The method comprises the steps of fusing data such as a trading system clearing plan, a non-market unit dispatching modification plan, a power generation boundary plan modified by a dispatcher, a tie line plan, bus load prediction data, a non-uniform power plant power generation plan and the like based on a power market starting stage and participating in a market unit, forming a future mode section of a dispatching plan at a change moment, and then performing alternating-current and direct-current hybrid power flow calculation on the formed future mode section by utilizing an alternating-current and direct-current power flow algorithm. The safety check workload after the schedule of the dispatching personnel is modified is reduced, and the safe and stable operation level of the power grid is improved.
Description
Technical Field
The invention relates to a power generation dispatching plan safety checking method, in particular to a power generation dispatching plan safety checking method based on multi-source data fusion in a starting stage of a power market. Belonging to the field of power system automation.
Background
With the steady advance of the electric power market construction in China, the market construction effect is obvious, and the marketized transaction reaches a certain scale. In the starting stage of the electric power market, the market and the plan are coordinated to run, so that the current dispatching plan is promoted to be stably transited to the market, and the large influence on national economy and social stability caused by the severe fluctuation of the price of the electric power market is effectively ensured. The spot market transaction is limited by the factors such as the region, so that a mode of fusing a market clearing plan and a non-market plan of some types of units also exists in the aspect of scheduling plan making. The market clearing plan can be provided by a spot market support system, the day-ahead power generation plan, the tie-line plan and the like in the non-market plan are arranged by operation mode personnel in the previous day, and the change of the day-in plan and the modification of the plan among certain areas are adjusted by scheduling personnel according to the actual operation condition of the power grid. The change of the dispatching plan is of great importance to the operation safety of the power grid, so that the modified power generation plan and the modified tie line plan must be correspondingly checked for the safety of the power grid.
Disclosure of Invention
The invention aims to provide a power generation dispatching plan safety check method for a power market so as to realize corresponding power grid safety check on modified power generation plans and tie line plans.
The technical scheme of the invention is as follows:
a safety checking method for a power generation dispatching plan in a power market is characterized by comprising the following steps:
the first step is as follows: forming an initial section based on the current power grid model and real-time data;
the second step is that: performing alternating current and direct current mixed power flow calculation on an initial section, and recording heavy overload equipment information of a ground state power grid; if there is a tide
If the current is not converged, checking the real-time section, returning to the second step, and if the current is converged, entering the third step;
the third step: will include the modified power plant generation plan, tie-line plan, bus load forecast data, and unregulated power
Fusing data including the plant power generation plan to form a future mode section of the scheduling plan at the moment of changing;
the fourth step: performing alternating current and direct current hybrid power flow calculation on the future mode section;
the fifth step: calculating the stable section of the power grid according to the tidal current result in the fourth step;
and a sixth step: and checking whether the stable section of the power grid has newly increased heavy load and out-of-limit, checking whether the power grid has newly increased circuits and transformer heavy load out-of-limit, and outputting a safety check result.
The method for forming the future mode section of the time when the dispatching plan is changed comprises the following steps:
1) and distributing the planned values of the direct power regulation plan and the direct water power regulation plan to the power plants in the power grid model according to the comparison relationship between the power generation plan and the power plants, wherein the distribution method comprises the following steps: if the generator set has the single-machine plan, reading the single-machine plan, recording a single-machine plan reading mark, and not reading the power plant plan with the single-machine plan; if the power plant does not have the single machine plan, reading the whole plant plan, and distributing plan values to the on-line unit according to the spare capacity proportion of the on-line unit;
2) according to the contrast relation between the call wire plan and the direct current circuit, distributing the direct current sending end plan and the direct current receiving end plan to a converter of the direct current circuit, wherein the sending end forms direct current circuit transmission data according to power load and the receiving end according to power supply output, and participates in the future state section of the power grid tide;
3) associating the predicted value to the corresponding bus according to the comparison relation between the bus load prediction and the bus, and using the predicted value as the initial data of the active load and the reactive load of the bus;
4) distributing the planned value of the non-direct-transfer power plant plan to the power plant in the power grid model according to the comparison relation between the non-direct-transfer power plant plan and the power plant, wherein the distribution method comprises the following steps: if the non-directly-regulated power plant has a single-machine plan, reading the single-machine plan, recording a reading mark and not reading a whole plant plan; and (4) the non-direct-dispatching power plant without the single machine plan carries out the operation of the unit according to the proportion of the spare capacity of the operation unit.
The invention has the positive effects that: the invention provides a multi-source data fusion-based safety check method for an alternating current and direct current hybrid power flow dispatching plan in a starting stage of an electric power market, which is characterized in that data such as a power generation boundary plan, a tie line plan, bus load prediction data, a power generation plan of an unregulated power plant and the like modified by a dispatcher are fused to form a future mode section of the dispatching plan at the moment of changing, and then an alternating current and direct current power flow algorithm is utilized to calculate the formed future mode section; therefore, the safety check workload after the schedule of the dispatching personnel is modified is reduced, and the safe and stable operation level of the power grid is improved.
Drawings
Fig. 1 is a flow chart of checking an alternating current-direct current hybrid power flow scheduling plan based on multi-source data fusion in an electric power market starting stage according to the embodiment of the invention.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
The method comprises the steps that a power grid model, power operation real-time data and power grid stable section definition are obtained from a dispatching operation control system, wherein the power grid model and the power grid stable section definition are updated in an incremental mode, and the dispatching operation control system can send the power grid model and the power grid stable section definition to the system when changes occur; the power operation real-time data is updated every two minutes. The day-ahead power generation plan of the power plant and the day-ahead plan of the tie line are from a dispatching operation management system, the predicted value of the bus load is from a dispatching operation control system, and the day-in rolling plan of the power plant and the day-in rolling plan of the tie line are from the dispatching operation control system.
In order to form a future mode section by using the plan value, firstly, establishing a comparison relation between a power generation plan of a power plant and the power plant in a power grid model, between a tie line plan and a tie line, and between a bus load predicted value and a bus in the power grid model, wherein the method comprises the following steps:
(1) the design plan definition table is used for storing data point numbers corresponding to the power generation plan, the tie line plan and the bus load prediction plan of the power plant, and the table structure is as follows:
Create table t_rpods_schdef
(
schName char(64),
schMeasName char(64),
intervalTime int,
…
)
wherein, the schName represents the plan name in the plan file, the schMeasName represents the corresponding data point number in the safety check system, the intervalTime represents the plan value interval, and other attributes of the plan which are not related to the comparison relation are skipped.
(2) And designing a power plant definition table for storing the comparison relationship between the power generation plan data point number and the power plant ID in the power grid model, wherein the table structure is as follows:
Create table t_rpods_PwrStation
(
pwrID char(64),
schMeasName char(64),
)
the pwrID represents a power plant ID in the power grid model and is derived from a power plant in the power grid model, and the schMeasName represents a planning data point number corresponding to the power plant and is derived from a planning definition table t _ rpods _ schdef.
(3) Designing a direct current circuit table for storing the comparison relationship between the direct current circuit planning data point number and the direct current circuit, wherein the table structure is as follows:
Create table t_rpods_dcline
(
dcLineID char(64),
sendSchMeas char(64),
receiveSchMeas char(64)
)
wherein dcLineID represents a direct current line ID and is derived from a direct current line in a power grid model, and sendSchMeas and receiveSchMeas respectively represent a sending end planning data point number and a receiving end planning data point number of the direct current line and are derived from a planning definition table t _ rpods _ schdef.
(4) Designing a bus definition table for storing the comparison relationship between the bus load prediction data point number and the bus, wherein the table structure is as follows:
Create table t_rpods_ldfbus
(
busID char(64),
schMeasName char(64)
)
the busID represents a bus ID and is derived from a bus in the power grid model, and the scdhmaame represents a bus load prediction data point number and is derived from a plan definition table t _ rpods _ schdef.
As shown in fig. 1, the embodiment of the present invention includes the following specific steps:
the first step is as follows: forming an initial section based on the current power grid model and real-time data;
the second step is that: performing alternating current and direct current mixed power flow calculation on an initial section, and recording heavy overload equipment information of a ground state power grid; if there is a tide
If the current is not converged, checking the real-time section, returning to the second step, and if the current is converged, entering the third step;
the third step: will include the modified power plant generation plan, tie-line plan, bus load forecast data, and unregulated power
Fusing data including the plant power generation plan to form a future mode section of the scheduling plan at the moment of changing;
the fourth step: performing alternating current and direct current hybrid power flow calculation on the future mode section;
the fifth step: calculating the stable section of the power grid according to the tidal current result in the fourth step;
and a sixth step: and checking whether the stable section of the power grid has newly increased heavy load and out-of-limit, checking whether the power grid has newly increased circuits and transformer heavy load out-of-limit, and outputting a safety check result.
In the third step, the method for forming the future mode section of the time when the dispatch plan is changed comprises the following steps:
1) and distributing the planned values of the direct power regulation plan and the direct water power regulation plan to the power plants in the power grid model according to the comparison relationship between the power generation plan and the power plants, wherein the distribution method comprises the following steps: if the generator set has the single-machine plan, reading the single-machine plan, recording a single-machine plan reading mark, and not reading the power plant plan with the single-machine plan; if the power plant does not have the single machine plan, reading the whole plant plan, and distributing plan values to the on-line unit according to the spare capacity proportion of the on-line unit;
2) according to the contrast relation between the call wire plan and the direct current circuit, distributing the direct current sending end plan and the direct current receiving end plan to a converter of the direct current circuit, wherein the sending end forms direct current circuit transmission data according to power load and the receiving end according to power supply output, and participates in the future state section of the power grid tide;
3) associating the predicted value to the corresponding bus according to the comparison relation between the bus load prediction and the bus, and using the predicted value as the initial data of the active load and the reactive load of the bus;
4) distributing the planned value of the non-direct-transfer power plant plan to the power plant in the power grid model according to the comparison relation between the non-direct-transfer power plant plan and the power plant, wherein the distribution method comprises the following steps: if the non-directly-regulated power plant has a single-machine plan, reading the single-machine plan, recording a reading mark and not reading a whole plant plan; and (4) the non-direct-dispatching power plant without the single machine plan carries out the operation of the unit according to the proportion of the spare capacity of the operation unit.
And sixthly, checking whether the cross section, the line and the transformer have a heavy overload process, wherein in the actual power grid operation, the heavy load thresholds of the cross section, the line and the transformer are different, but the overload thresholds are unified to be 100%. Therefore, a heavy-load threshold which can be flexibly set by a dispatcher is designed, and the structure of the heavy-load threshold is as follows:
create table PfCheck_Set_Tab
(
Line_Heavy_Value float(15,4) not null,
Tran_Heavy_Value float(15,4) not null,
Sect_Heavy_Value float(15,4) not null
);
wherein Line _ Heavy _ Value represents Line Heavy load threshold Value setting, Tran _ Heavy _ Value represents transformer Heavy load threshold Value setting, and Sect _ Heavy _ Value represents section Heavy load threshold Value setting.
The dispatching operation personnel carries out safety check on the modified dispatching plan according to the safety check result of the method, if the safety check does not pass, the dispatching operation personnel needs to carefully check whether the modified dispatching plan is reasonable or not and carry out plan rollback with pertinence; if the safety check is passed, the modified scheduling plan value is reasonable, and the next plan auditing and issuing operation can be carried out.
Claims (2)
1. A safety checking method for a power generation dispatching plan in a power market is characterized by comprising the following steps:
the first step is as follows: forming an initial section based on the current power grid model and real-time data;
the second step is that: performing alternating current and direct current mixed power flow calculation on an initial section, and recording heavy overload equipment information of a ground state power grid; if there is a tide
If the current is not converged, checking the real-time section, returning to the second step, and if the current is converged, entering the third step;
the third step: will include the modified power plant generation plan, tie-line plan, bus load forecast data, and unregulated power
Fusing data including the plant power generation plan to form a future mode section of the scheduling plan at the moment of changing;
the fourth step: performing alternating current and direct current hybrid power flow calculation on the future mode section;
the fifth step: calculating the stable section of the power grid according to the tidal current result in the fourth step;
and a sixth step: and checking whether the stable section of the power grid has newly increased heavy load and out-of-limit, checking whether the power grid has newly increased circuits and transformer heavy load out-of-limit, and outputting a safety check result.
2. The method for safely checking the power generation dispatching plan of the power market as claimed in claim 1, wherein the method for forming the future mode section of the dispatching plan at the moment of changing comprises the following steps:
1) and distributing the planned values of the direct power regulation plan and the direct water power regulation plan to the power plants in the power grid model according to the comparison relationship between the power generation plan and the power plants, wherein the distribution method comprises the following steps: if the generator set has the single-machine plan, reading the single-machine plan, recording a single-machine plan reading mark, and not reading the power plant plan with the single-machine plan; if the power plant does not have the single machine plan, reading the whole plant plan, and distributing plan values to the on-line unit according to the spare capacity proportion of the on-line unit;
2) according to the contrast relation between the call wire plan and the direct current circuit, distributing the direct current sending end plan and the direct current receiving end plan to a converter of the direct current circuit, wherein the sending end forms direct current circuit transmission data according to power load and the receiving end according to power supply output, and participates in the future state section of the power grid tide;
3) associating the predicted value to the corresponding bus according to the comparison relation between the bus load prediction and the bus, and using the predicted value as the initial data of the active load and the reactive load of the bus;
4) distributing the planned value of the non-direct-transfer power plant plan to the power plant in the power grid model according to the comparison relation between the non-direct-transfer power plant plan and the power plant, wherein the distribution method comprises the following steps: if the non-directly-regulated power plant has a single-machine plan, reading the single-machine plan, recording a reading mark and not reading a whole plant plan; and (4) the non-direct-dispatching power plant without the single machine plan carries out the operation of the unit according to the proportion of the spare capacity of the operation unit.
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|---|---|---|---|
| CN202011272461.6A CN112381401A (en) | 2020-11-13 | 2020-11-13 | Power market power generation dispatching plan safety checking method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114156892A (en) * | 2021-11-30 | 2022-03-08 | 中国电力科学研究院有限公司 | Regional power grid future power flow power balancing method, system, equipment and storage medium |
| CN115513952A (en) * | 2022-11-23 | 2022-12-23 | 中国电力科学研究院有限公司 | Safety check method, system, equipment and medium for regional power grid power generation |
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| CN103280797A (en) * | 2013-04-27 | 2013-09-04 | 国家电网公司 | Day-ahead static security correction method |
| CN104318391A (en) * | 2014-10-24 | 2015-01-28 | 中国南方电网有限责任公司 | Method for implementing plan security check on basis of power grid operation service bus |
| CN107359616A (en) * | 2017-07-18 | 2017-11-17 | 国电南瑞科技股份有限公司 | One kind solves the not convergent method of Load flow calculation after large scale electric network mode adjusts |
| CN107464048A (en) * | 2017-07-26 | 2017-12-12 | 广东电网有限责任公司电力调度控制中心 | A kind of plan security check method a few days ago based on research state |
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2020
- 2020-11-13 CN CN202011272461.6A patent/CN112381401A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280797A (en) * | 2013-04-27 | 2013-09-04 | 国家电网公司 | Day-ahead static security correction method |
| CN104318391A (en) * | 2014-10-24 | 2015-01-28 | 中国南方电网有限责任公司 | Method for implementing plan security check on basis of power grid operation service bus |
| WO2016062179A1 (en) * | 2014-10-24 | 2016-04-28 | 南京南瑞继保电气有限公司 | Method for implementing plan security check on the basis of power grid operation service bus |
| CN107359616A (en) * | 2017-07-18 | 2017-11-17 | 国电南瑞科技股份有限公司 | One kind solves the not convergent method of Load flow calculation after large scale electric network mode adjusts |
| CN107464048A (en) * | 2017-07-26 | 2017-12-12 | 广东电网有限责任公司电力调度控制中心 | A kind of plan security check method a few days ago based on research state |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114156892A (en) * | 2021-11-30 | 2022-03-08 | 中国电力科学研究院有限公司 | Regional power grid future power flow power balancing method, system, equipment and storage medium |
| CN115513952A (en) * | 2022-11-23 | 2022-12-23 | 中国电力科学研究院有限公司 | Safety check method, system, equipment and medium for regional power grid power generation |
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Application publication date: 20210219 |