CN112147977A - High-fidelity transmission test method for stability control system of direct-current power transmission system - Google Patents
High-fidelity transmission test method for stability control system of direct-current power transmission system Download PDFInfo
- Publication number
- CN112147977A CN112147977A CN202010838016.5A CN202010838016A CN112147977A CN 112147977 A CN112147977 A CN 112147977A CN 202010838016 A CN202010838016 A CN 202010838016A CN 112147977 A CN112147977 A CN 112147977A
- Authority
- CN
- China
- Prior art keywords
- stability control
- generator
- direct current
- hydropower station
- station
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
-
- 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
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Eletrric Generators (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a high-fidelity transmission test method for a stability control system of a direct-current power transmission system, which comprises the following steps: evaluating whether the direct-current power transmission system has test conditions or not according to the running condition of the direct-current power transmission system; compiling a test scheme and determining the control requirement of the direct current transmission system; according to the test scheme, adjusting the running state of the direct-current transmission system to meet the control requirement of the compiled test scheme; performing offline confirmation of the direct current transmission system before fault triggering; triggering a fault of a direct current transmission system, ordering field operation of ESOF (emergency service and emergency service) blocking direct current, and confirming the system running condition and the condition of primary and secondary equipment of a related plant after direct current blocking; and analyzing and evaluating the action result of the stability control system. The invention further verifies the safety and reliability of the strategy logic of the stability control system in actual operation, ensures that the stability control system can effectively play a role in actual fault and ensures the safe and stable operation of the system.
Description
Technical Field
The invention relates to the field of direct-current power transmission systems, in particular to a high-fidelity transmission test method for a stability control system of a direct-current power transmission system.
Background
A safety and stability control system (called a stability control system for short) is an important defense line for ensuring the safe and stable operation of a power grid. The control system is used for restoring the system to a normal operation state by executing various emergency control measures after the system is in an emergency state. The system generally comprises two or more safety and stability control devices of a plant station which are communicated through communication equipment, so that the stability control of an electric power system in a region or a larger range is realized.
With the development of power grids, direct current transmission becomes a very important power transmission mode and becomes a main power transmission mode of 'west-east power transmission' in China. At present, the power grid in China forms a complex large power grid characterized by long distance, large capacity, long distance and alternating current-direct current hybrid operation. When a large-capacity direct current blocking fault occurs, the problem of safety and stability of the system is caused, and a safety and stability control system needs to be configured to take measures such as removing a unit at a sending end and removing a load at a receiving end, so that how to ensure correct and reliable action of the stability control system during the fault is an important measure for ensuring safe and stable operation of a large power grid.
Most of the conventional stability control systems are in a customized mode, and the safety and reliability of the stability control systems in the mode are highly dependent on the level of developers and various testing works before commissioning, so that a large number of off-line tests (such as factory acceptance, field debugging and the like) are generally passed before the stability control systems are put into operation formally, and the off-line tests ensure the correctness of the strategy logic of the stability control systems to a certain extent. On one hand, the off-line test environment is different from the actual normal operation condition after the stable control system is put into operation; on the other hand, the off-line test of the stability control system is only performed once before the stability control system is put into operation after the strategy logic of the stability control system is changed. After the stability control system is put into operation, the operation environment of the device is constantly changed, abnormal changes which cannot be known under normal conditions can occur to hardware of the device along with the lapse of time, and the software of the device can also generate some abnormal changes after the operation time is longer, and the abnormal changes can not be identified through the alarm monitoring of the normal device, so that the safety and the reliability of the strategy logic of the stability control system can be further verified in the actual operation, the stability control system can effectively play a role in the actual fault, the safe and stable operation of the system can be ensured, and the method has very important significance.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the high-fidelity transmission test method for the stability control system of the direct-current transmission system, which is used for further verifying the safety and reliability of the strategy logic of the stability control system in actual operation, ensuring that the stability control system can effectively play a role in actual fault and ensuring the safe and stable operation of the system.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a high-fidelity transmission test method for a stability control system of a direct current transmission system is used for the direct current transmission system, the direct current transmission system comprises a first direct current converter station and a second direct current converter station which are connected,
the first direct current converter station is connected with a sending end alternating current power grid and at least connected with a first hydropower station and a second hydropower station, and the first hydropower station and the second hydropower station are at least respectively connected with at least 2 generator sets;
the second direct current converter station is connected with a receiving end alternating current power grid;
wherein the first direct current converter station, the first hydropower station and the second hydropower station are respectively provided with a stability control device, and the stability control devices of the first hydropower station and the second hydropower station are respectively electrically connected with the stability control device of the first direct current converter station,
the method comprises the following steps:
step 1: evaluating whether the direct-current power transmission system has test conditions or not according to the running condition of the direct-current power transmission system;
step 2: compiling a test scheme and determining the control requirement of the direct current transmission system;
and step 3: according to the test scheme, adjusting the running state of the direct-current transmission system to meet the control requirement of the compiled test scheme;
and 4, step 4: performing off-line confirmation of the stability control system before fault triggering;
and 5: triggering a fault of a direct current transmission system, ordering field operation of ESOF (emergency service and emergency service) blocking direct current, and confirming the system running condition and the condition of primary and secondary equipment of a related plant after direct current blocking;
step 6: and analyzing and evaluating the action result of the stability control system.
The method for the high-fidelity transmission test of the stability control system of the direct current transmission system further evaluates whether the direct current transmission system has test conditions, and specifically comprises the following steps: and evaluating the influence possibly caused by the direct current transmission system according to the transmission test result, and judging whether the transmission test result influences the power supply of the system, or causes water abandon, or influences the operation of the power grid, if so, the transmission test cannot be carried out, and if not, the transmission test can be carried out.
The high-fidelity transmission test method for the stability control system of the direct current transmission system further comprises the following steps of: after considering the possible failure and misoperation of stability control in the transmission test process, the selected operation mode should be controlled within the bearable range under the influence on the system, and the direct current operation power during the transmission test, the control requirement of the relevant section of the system, the output requirement of the generator set of the relevant hydropower station and the relevant fixed value of the stability control system are adjusted for matching the transmission test are determined.
The method for high-fidelity transmission test of the stability control system of the direct current transmission system further comprises the following specific steps of off-line confirmation: the method comprises the steps that a stability control device of a first direct current converter station receives first information sent by stability control devices of a first hydropower station and a second hydropower station, the result after the stability control device acts is analyzed and calculated in an off-line mode according to the first information, whether the calculated result meets an expected test result or not is judged, if not, reasons are searched, and whether a condition for continuing a transmission test is met or not is evaluated; if yes, the next step is carried out.
The method for high-fidelity transmission test of the stability control system of the direct current transmission system further comprises the following specific steps of: judging whether the result of the stability control action in the test is correct or not according to second information displayed in the action messages of the stability control devices of the first direct current converter station, the first hydropower station and the second hydropower station, and if so, recovering the related set values of the direct current transmission system and the stability control device until the running state before the test; if not, searching and analyzing reasons, evaluating the influence on the system operation, and restoring the normal operation of the system according to the evaluated control requirement.
The high-fidelity transmission test method for the stability control system of the direct current transmission system further comprises the following steps of,
the goals of the compiled test protocol were: after the direct current bipolar locking, respectively cutting off one unit of each of the first hydropower station and the second hydropower station;
the process of compiling the test protocol includes:
considering the influence on the system after stable control refusal action and misoperation which possibly occur in the test process, the direct current bipolar power is required to be W during the test, and the power W of the generator set with the first generator set in the generator tripping sequence of the first hydropower station is required1Requiring the first generator set of the generator-cutter sequence of the second hydroelectric power station to output W2The cutting machine is required to be in sequence as follows: sequentially and alternately cutting off the generator set of the first hydropower station and the generator set of the second hydropower station;
under the condition of meeting the test requirements and the requirements of controlling the power of the AC networking section of the DC and sending terminals, the total output of the generator sets of the first hydropower station and the second hydropower station and the generator tripping strategy calculation base value P of the stability control device of the first DC convertor station are requiredsetIs set as Wset，
Calculating the machine cutting amount D according to the stability control strategyP＝PDC-Pset(ii) a In the formula, PDC: DC pole blocking loss power, here W, PsetCalculating a base value for the tripping strategy;
calculating the switching value D when requiring DC bipolar blockingpIs WpRequires WpGenerator set output W greater than first generator set output in generator set cutting sequence of first hydropower station1And is less than the generator set output W of the first hydropower station in the generator set sequence1And the generator set with the first generator set output force W of the generator set sequence of the second hydropower station2Sum of (2)1+W2；
According to the expected result of the stability control strategy: and when the direct-current bipolar is locked, the stable control action can sequentially cut off the generator set with the first generator set in the generator cutting sequence of the first hydropower station and the generator set with the first generator set in the generator cutting sequence of the second hydropower station.
The method for high-fidelity transmission test of the stability control system of the direct current transmission system further adjusts the running state of the direct current transmission system according to the compiled test scheme so as to meet the test scheme, and specifically comprises the following steps:
adjusting the direct current bipolar power to be set as W;
the first hydropower station has four generator sets and two generator sets are put into, and the generator set with the first cutter sequence of the first hydropower station has the power W1The second hydroelectric station has four generator sets and two generator sets, the generator set of the second hydroelectric station has the first generator set with power W2The power of the other generator set input by the first hydropower station and the second hydropower station is set to be W which is larger than the set operation power fixed value3；
Setting a generator tripping strategy calculation base value P of a stability control device of a first direct current converter stationsetIs Wset。
The method for high-fidelity transmission test of the stability control system of the direct current transmission system further includes the following specific steps:
direct current bipolar power conditions;
each unit output condition of the first hydropower station comprises: the generator set output condition of the first generator set in the generator tripping sequence, the generator set output condition of the second generator set in the generator tripping sequence and the generator set output condition which is not input;
each unit of the second hydropower station outputs the condition, and the condition comprises the following components: the generator set output condition of the first generator set in the generator tripping sequence, the generator set output condition of the second generator set in the generator tripping sequence and the generator set output condition which is not input;
the result of the calculation includes: the generator set output and the generator set sequence of the first hydropower station and the second hydropower station are the conditions; the machine cutting amount is calculated during direct current bipolar locking; and stably controlling the running condition of the device at each station.
The method for the high-fidelity transmission test of the stability control system of the direct current transmission system further includes the following steps: the method comprises the steps that an alternating generator set sequence of a first hydropower station and a second hydropower station, a first generator cutting instruction and a second generator cutting instruction are displayed in an action message of a first direct-current converter station stability control device, wherein the first generator cutting instruction is used for indicating the first hydropower station to cut a generator set with a first generator cutting sequence, and the second generator cutting instruction is used for indicating the second hydropower station to remove a generator set with a first generator cutting sequence; the method comprises the steps that a cut unit command sent by a first direct current converter station stability control device and a unit actually cut at an action outlet are received and displayed in an action message of the first hydropower station stability control device; and the action message of the second hydropower station stability control device receives the unit cutting command sent by the first direct current converter station stability control device and the unit actually cut by the action outlet.
Compared with the prior art, the invention has the beneficial effects that: the method analyzes the action behavior of the corresponding stability control system when the actual direct current system is artificially triggered to have a fault in a certain period (such as once a year), so as to verify the correctness of the strategy logic of the stability control system. The stability control system in the transmission test method is in a normal operation input state, so that the action behavior of the stability control system under the actual fault condition of the system can be reflected very really, and the correctness of the control strategy, the device, the secondary loop and other whole process links of the stability control system can be checked. An important verification measure is provided for verifying the correct reliability of the stability control system in actual operation, and the problem that the existing stability control system is in an off-line test dead zone due to the fact that an off-line environment is different from an actual operation environment of the system is solved; the potential risk that the stable control system acts incorrectly due to the fact that the device running environment changes and the possible abnormality that the hardware and the software cannot monitor and alarm normally after the stable control system is put into operation is avoided.
Drawings
FIG. 1 is a schematic structural diagram of a DC power transmission system and a stability control system thereof; fig. 1(a) is a schematic structural diagram of a direct current transmission system, and fig. 1(b) is a schematic structural diagram of a stability control system;
FIG. 2 is a flow chart of a method of an offline validation mechanism;
FIG. 3 is a flow chart of a high-fidelity transmission test method of a stability control system.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Example (b):
it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a dc power transmission system and a stability control system thereof, for convenience of description, a first dc converter station is also called a dc converter station a, a second dc converter station is also called a dc converter station B, a first hydropower station is also called an a hydropower station, a second hydropower station is also called a B hydropower station, a generator set is simply called a set, and electrical connection can be selected from common connection communication modes including 2M optical fiber channel connection and the like.
As shown in fig. 1(a), A, B two hydropower stations (each having 4 units) are connected to a dc converter station a through an ac transmission line, the dc converter station a is connected to a transmitting-end ac grid through an ac transmission line, the dc converter station a is connected to a dc converter station B through a dc line, and the dc converter station B is connected to a receiving-end ac grid through an ac line, so as to form a dc transmission system. In order to ensure the safe and stable operation of the sending end power grid when the direct current system fails, stable control devices are respectively configured on a direct current converter station A, a hydropower station A and a hydropower station B, all the stable control devices are connected through multiplexing 2M optical fiber channels to realize information interaction, so that a sending end direct current locking and tripping stable control system is formed,
as shown in fig. 1(b), in the stability control system, the stability control device of the dc converter station a is a master station, and is mainly responsible for determining a dc system fault, receiving A, B unit operation information sent by the stability control device of the hydropower station, and when the dc system fault is determined, calculating a switching value D according to a stability control strategyP＝PDC-Pset(PDC: DC pole blocking loss power, here W, PsetCalculating a base value for the tripping strategy) and sending tripping commands to A, B hydropower station stability control devices; the hydropower station A and B stable control devices are sub-stations and are mainly responsible for collecting unit information of the hydropower station and sending the unit information to the main station, and receiving a generator tripping command sent by the main station to cut off corresponding units (the hydropower station A, B alternately cuts off the units of the hydropower station A in turn, the cutting-off sequence of the units of the hydropower station A is 1, 2, 3 and 4, and the cutting-off sequence of the units of the hydropower station B is 4, 3, 2 and 1).
The invention discloses a high-fidelity transmission test method for a stability control system of a direct-current power transmission system. "high fidelity" as the name implies is a highly faithful meaning. According to the method, when the actual direct current system fails in a certain period (such as once a year), the action behaviors of the corresponding stable control system are analyzed to verify the correctness of the strategy logic of the stable control system. The stability control system in the transmission test method is in a normal operation input state, so that the action behavior of the stability control system under the actual fault condition of the system can be reflected very truly, and the correctness of the control strategy, the device, the secondary circuit and other overall process links of the stability control system can be checked. In order to reduce the influence on the system, the high-fidelity transmission test is carried out in an operation mode within a bearable range by considering the influence on the system after possible stable control rejection and misoperation, so that the actual operation condition of the system is fully considered before the test to determine whether the system has the system operation condition required by the test.
The embodiment of the invention provides a high-fidelity transmission test method for a stability control system of a direct-current power transmission system, which comprises the following steps:
step 1: and evaluating whether the test conditions are met or not according to the system operation condition. Because a real direct current system fault needs to be started in a test, the influence on the system needs to be evaluated according to the possible result of the test, such as whether direct current blocking influences the power supply of the system, whether water abandon and other conditions influencing the operation of a power grid are caused.
In one example, the direct current system is about to be overhauled in a power failure mode, a direct current locking cutter transmission test can be completed before overhauling, a locked direct current is tested, and then the overhauling state is changed, so that the system has the testing condition.
Step 2: and compiling a test scheme according to the actual operation condition of the system, and determining the control requirement of the system. The influence on the system after possible stable control operation refusal and misoperation in the test process is considered to be controlled under the operation mode within the bearable range. Determining the direct current running power during the test, the related control requirements of the related section of the system, the output requirements of the related power plant units and the like, and performing necessary adjustment on the related fixed value of the stability control system for matching the test.
In one example, the test protocol is determined by cutting off one unit from each of the hydropower station a and the hydropower station B after the dc bipolar blocking. Considering the influence on the system after possible stable control operation rejection and misoperation in the test process, the direct current bipolar power is 1000MW during the test, the hydropower station A is at least provided with two machines, each machine group outputs more than 50MW, the machine group No. 1 is appointed to output 300MW, the hydropower station B is at least provided with two machines, each machine group outputs more than 50MW, and the machine group No. 4 is appointed to output 500 MW. And arranging the total output of the units of the hydropower station A and the hydropower station B under the condition of meeting the test requirement and the power control requirement of the direct-current and sending-end alternating-current networking section. The tripping strategy calculation base value Pset of the stable control device of the flow changing station A is set to be 600MW, so that the calculated tripping amount Dp is PDC-Pset 1000-.
And step 3: and adjusting the running state of the system according to the test scheme to meet the running condition of the test system, and adjusting the related stable control value and the state of the pressing plate.
In one example, according to the test scheme formulated in step 2, the direct current bipolar power is adjusted to be maintained at 1000MW, two hydropower stations a (300 MW of output of the unit 1 and 100MW of output of the unit 2) and two hydropower stations B (500 MW of the unit 4 and 100MW of the unit 3) are started, and the cutter strategy calculation base value Pset in the stability control device of the direct current converter station a is modified to be 600 MW.
And 4, step 4: and performing offline confirmation before fault triggering. As shown in fig. 2, the results after the operation of the stability control system are analyzed and calculated off-line according to the key acquisition amount and the transmission information of the stability control system device in the system operation state before the fault trigger (which is consistent with the actual fault state), and whether the results meet the policy logic and the expected test results. If the analysis confirms that the result does not accord with the expected test result, the reason is searched, and whether the condition for continuing the test is met or not is evaluated; and if the analysis confirms that the result accords with the expected test result, the next step is carried out.
In one example, the key acquisition quantity of the stability control device of the direct current converter station A and the information transmitted by the substation are checked. The results were: the direct current bipolar power displayed by the stable control device is 1000MW, which is consistent with the actual direct current power; the output of each unit of the hydropower station A received and displayed by the stability control device is as follows: the output of the unit 1 is 300MW, the output of the unit 2 is 100MW, and the output of the units 3 and 4 is 0 and is consistent with the actual output of the hydropower station A; the output of each unit of the hydropower station B received and displayed by the stability control device is as follows: the output of the No. 4 unit is 500MW, the output of the No. 3 unit is 100MW, and the output of the 1 and 2 units is 0; the cutter sequence displayed by the stability control device is as follows: the first sequence generator set is a generator set No. 1 of a hydropower station A, the second sequence is a generator set No. 4 of the hydropower station B, the third sequence is a generator set No. 2 of the hydropower station A, and the fourth sequence is a generator set No. 3 of the hydropower station B, and the sequence is consistent with the preset generator set sequence; the required cut amount of the direct current bipolar locking displayed by the stable control device is 400MW, which is equal to 400MW which is obtained by calculating the cutter amount Dp which is PDC-Pset which is 1000-. And the stability control devices of all the stations run normally, so that the action consequences of the stability control devices are analyzed in an off-line manner according to the displayed key information of the stability control devices and accord with strategy logic and expected test results, and the next test can be carried out, namely, the system fault is triggered.
And 5: triggering system failure, and commanding field operation of ESOF to lock direct current. And after the direct current is locked, the system runs normally, and the primary and secondary equipment of the related plant station is not abnormal.
In one example, the dc converter station a is instructed to manually perform a bipolar ESOF. And (3) the direct-current bipolar is correctly locked, the unit No. 1 of the hydropower station A is cut off, the unit No. 4 of the hydropower station B is cut off, the system runs normally, and primary and secondary equipment of related plants is not abnormal.
Step 6: and analyzing and evaluating the action result of the stability control system. And checking the stability control action result and the message of each relevant plant station, and preliminarily analyzing the correctness of the stability control action result. If the test result is correct, the related fixed values of the recovery system and the stability control device are equal to the running state before the test; and if the control request is incorrect, carrying out reason searching analysis, evaluating the influence on the system operation, and restoring the normal operation of the system according to the evaluated control request.
In one example, after the dc bipolar blocking, unit number 1 of hydroelectric power station a is cut and unit number 4 of hydroelectric power station B is cut. Checking the action messages of the stability control devices of the direct current converter A, the hydropower station A and the hydropower station B, wherein the result is as follows: the stability control device of the direct current converter station A displays that direct current bipolar locking faults need to be cut by 400MW, a first sequence cutter set (No. 1 set of the hydropower station A) and a second sequence cutter set (No. 4 set of the hydropower station B) are actually sent and cut, and the actual cutter set outputs 800 MW; a stable control device of the hydropower station A displays a command of cutting the unit No. 1 sent by a main station and exports the cut unit; and the stability control device of the hydropower station B displays a command of cutting the No. 4 unit sent by the main station and exports the cutting unit. According to the message, the action of the stability control system is in accordance with the strategy logic, the actual cutting machine set is in accordance with the strategy action result, and the action response of the stability control system is correct. Therefore, the operation state of the tripping strategy calculation base value Pset in the stability control device of the direct current converter station A before the test is recovered, and the system is arranged to operate according to the normal operation plan.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, characteristic, or method step described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, characteristics, or method steps described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (9)
1. A high-fidelity transmission test method for a stability control system of a direct current transmission system is used for the direct current transmission system and is characterized in that the direct current transmission system comprises a first direct current converter station and a second direct current converter station which are connected,
the first direct current converter station is connected with a sending end alternating current power grid and at least connected with a first hydropower station and a second hydropower station, and the first hydropower station and the second hydropower station are at least respectively and electrically connected with at least 2 generator sets;
the second direct current converter station is connected with a receiving end alternating current power grid;
wherein the first DC converter station, the first hydropower station and the second hydropower station are respectively provided with a stability control device, and the stability control devices of the first hydropower station and the second hydropower station are respectively electrically connected with the stability control device of the first DC converter station,
the method comprises the following steps:
step 1: evaluating whether the direct-current power transmission system has test conditions or not according to the running condition of the direct-current power transmission system;
step 2: compiling a test scheme and determining the control requirement of the direct current transmission system;
and step 3: according to the test scheme, adjusting the running state of the direct current transmission system and the stability control system thereof to meet the control requirement of the compiled test scheme;
and 4, step 4: performing off-line confirmation on the stable control system before fault triggering;
and 5: triggering a fault of a direct current transmission system, ordering field operation of ESOF (emergency service and emergency service) blocking direct current, and confirming the system running condition and the condition of primary and secondary equipment of a related plant after direct current blocking;
step 6: and analyzing and evaluating the action result of the stability control system.
2. The high-fidelity transmission test method for the stability control system of the direct-current transmission system according to claim 1, wherein whether the direct-current transmission system has test conditions is evaluated, and specifically: and evaluating the influence possibly caused by the direct current transmission system according to the transmission test result, and judging whether the transmission test result influences the power supply of the system, or causes water abandon, or influences the operation of the power grid, if so, the transmission test cannot be carried out, and if not, the transmission test can be carried out.
3. The high-fidelity transmission test method for the stability control system of the direct-current transmission system according to claim 1, wherein the control requirements of the direct-current transmission system specifically include: after considering stability control rejection and misoperation possibly occurring in the transmission test process, the selected operation mode is controlled within a bearable range under the influence on the system, and the direct current operation power during the transmission test, the control requirement of the relevant section of the system, the output requirement of the generator set of the relevant hydropower station and the relevant fixed value of the stability control system are adjusted for matching the transmission test are determined.
4. The high-fidelity transmission test method for the stability control system of the direct-current transmission system according to claim 1, wherein the offline confirmation specifically comprises: the method comprises the steps that a stability control device of a first direct current converter station receives first information sent by stability control devices of a first hydropower station and a second hydropower station, the result after the stability control device acts is analyzed and calculated in an off-line mode according to the first information, whether the calculated result is in accordance with an expected test result or not is judged, if not, reasons are searched, and whether a condition for continuing a transmission test is met or not is evaluated; if yes, the next step is carried out.
5. The high-fidelity transmission test method for the stability control system of the direct-current transmission system according to claim 1, wherein the analysis and evaluation process specifically comprises the following steps: judging whether the result of the stability control action in the test is correct or not according to second information displayed in the action messages of the stability control devices of the first direct current converter station, the first hydropower station and the second hydropower station, and if so, recovering the relevant set values of the direct current transmission system and the stability control device until the running state before the test; if not, searching and analyzing reasons, evaluating the influence on the system operation, and restoring the normal operation of the system according to the evaluated control requirement.
6. The high fidelity transmission test method of a stability control system of a direct current transmission system according to claim 3,
the goals of the compiled test protocol were: after the direct current bipolar locking, respectively cutting off one unit of each of the first hydropower station and the second hydropower station;
the process of compiling the test protocol includes:
considering the influence on the system after the stable control refusal action and the misoperation possibly occurring in the test process, tryingWhen the test is carried out, the direct current bipolar power is required to be W, and the output W of the generator set with the first generator set of the generator cutting sequence of the first hydropower station is required1Requiring the first generator set of the generator-cutter sequence of the second hydroelectric power station to output W2The cutting machine is required to be in sequence as follows: sequentially and alternately cutting off the generator set of the first hydropower station and the generator set of the second hydropower station;
under the condition of meeting the test requirements and the requirements of controlling the power of the alternating-current networking section of the direct current and the sending end, the total output of the generator sets of the first hydropower station and the second hydropower station and the generator tripping strategy calculation base value P of the stability control device of the first direct current converter station are requiredsetIs set as Wset，
Calculating the machine cutting amount D according to the stability control strategyP＝PDC-Pset(ii) a In the formula, PDC: DC pole blocking loss power, here W, PsetCalculating a base value for the tripping strategy;
calculating the switching value D when requiring DC bipolar blockingpIs WpRequires WpGenerator set output W greater than first hydropower station generator set output in first cutter sequence1And is less than the generator set output W of the first hydropower station in the generator set sequence1And the generator set output W of the first generator set of the generator-cutter sequence of the second hydropower station2Sum of (2)1+W2；
According to the expected result of the stability control strategy: with the direct current bipolar locking, the steady control action will sequentially cut off the generator set with the first generator set in the generator tripping sequence of the first hydropower station and the generator set with the first generator tripping sequence of the second hydropower station.
7. The high-fidelity transmission test method for the stability control system of the direct-current transmission system according to claim 6, wherein the adjusting of the running state of the direct-current transmission system to meet the test scheme according to the compiled test scheme specifically comprises:
adjusting the direct current bipolar power to be set as W;
the first hydropower station has four generator sets and is charged with two generator sets, the generator set of the first sequence of the generator cutting machine of the first hydropower station has the power of, the second hydropower station has four generator sets and is charged with two generator setsThe generator set of the second hydropower station with the generator set with the first generator set in the generator set sequence is W2The power of the other generator set input by the first hydropower station and the second hydropower station is set to be W which is larger than the set operation power fixed value3，；
Setting a generator tripping strategy calculation base value P of a stability control device of a first direct current converter stationsetIs Wset。
8. The high-fidelity transmission test method for the stability control system of the direct-current transmission system according to claim 7, wherein the first information specifically comprises:
direct current bipolar power conditions;
each unit output condition of the first hydropower station comprises: the generator set output condition of the first generator set in the generator tripping sequence, the generator set output condition of the second generator set in the generator tripping sequence and the generator set output condition which is not input;
each unit of the second hydropower station outputs the condition, and the condition comprises the following components: the generator set output condition of the first generator set in the generator tripping sequence, the generator set output condition of the second generator set in the generator tripping sequence and the generator set output condition which is not input;
the result of the calculation includes: the generator set output and the generator set sequence of the first hydropower station and the second hydropower station are the conditions; the machine cutting amount is calculated during direct current bipolar locking; and stably controlling the running condition of the device at each station.
9. The high-fidelity transmission test method of the stability control system of the direct current transmission system according to claim 8, wherein the second information comprises an alternating generator tripping sequence of generator sets of the first hydropower station and the second hydropower station, a first generator tripping command and a second generator tripping command, which are displayed in an action message of the stability control device of the first direct current converter station, wherein the first generator tripping command is used for instructing the first hydropower station to trip the generator set with the first generator tripping sequence, and the second generator tripping command is used for instructing the second hydropower station to remove the generator set with the first generator tripping sequence; the method comprises the steps that a cut unit command sent by a first direct current converter station stability control device and a unit actually cut at an action outlet are received and displayed in an action message of the first hydropower station stability control device; and the action message of the second hydropower station stability control device receives the command of the machine set to be cut and the machine set actually cut at the action outlet, which are sent by the first direct current converter station stability control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010838016.5A CN112147977B (en) | 2020-08-19 | 2020-08-19 | High-fidelity transmission test method for stability control system of direct-current transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010838016.5A CN112147977B (en) | 2020-08-19 | 2020-08-19 | High-fidelity transmission test method for stability control system of direct-current transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112147977A true CN112147977A (en) | 2020-12-29 |
| CN112147977B CN112147977B (en) | 2023-09-01 |
Family
ID=73887557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010838016.5A Active CN112147977B (en) | 2020-08-19 | 2020-08-19 | High-fidelity transmission test method for stability control system of direct-current transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112147977B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112865074A (en) * | 2021-01-11 | 2021-05-28 | 南方电网科学研究院有限责任公司 | Load shedding method and device for stable control device for direct current power rapid reduction and terminal equipment |
| CN113626298A (en) * | 2021-07-01 | 2021-11-09 | 南方电网科学研究院有限责任公司 | Multi-terminal direct current limiting online recovery function test method, system, equipment and medium |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015131602A1 (en) * | 2014-03-04 | 2015-09-11 | 国家电网公司 | Method for coordinating and controlling multi-terminal flexible direct current transmission system |
| CN105305450A (en) * | 2015-12-02 | 2016-02-03 | 中国电力科学研究院 | Power grid AC/DC cooperation control method after direct current block fault |
| CN105391050A (en) * | 2015-10-28 | 2016-03-09 | 南方电网科学研究院有限责任公司 | Checking method and system for high-cycle cutting machine configuration scheme |
| CN105515035A (en) * | 2015-12-14 | 2016-04-20 | 国家电网公司 | Control method of back-to-back DC power transmission system accessed to weak AC system |
| US20170025978A1 (en) * | 2015-05-07 | 2017-01-26 | State Grid Zhejiang Electric Power Research Institute | Low-Frequency Band Suppression Enhanced Anti-Reversal Power System Stabilizer |
| CN107732953A (en) * | 2017-11-02 | 2018-02-23 | 国网山西省电力公司电力科学研究院 | Machine order determination method is cut after the direct current locking of a kind of considering security and efficiency |
| CN107994619A (en) * | 2017-11-27 | 2018-05-04 | 中国电力科学研究院有限公司 | A kind of Multi-infeed HVDC transmission system start-up mode optimization method and system |
| CN108683206A (en) * | 2018-04-27 | 2018-10-19 | 南方电网科学研究院有限责任公司 | Passive island locking control system and method for direct current transmission system |
| CN108736500A (en) * | 2017-04-25 | 2018-11-02 | 中国电力科学研究院 | Machine method and apparatus are cut in the optimization of regional power grid affluence electric power direct current delivery system |
| CN109873444A (en) * | 2019-04-15 | 2019-06-11 | 南京南瑞继保电气有限公司 | Two-loop direct current power transmission system master control system and configuration method |
| CN210041339U (en) * | 2019-05-27 | 2020-02-07 | 南方电网科学研究院有限责任公司 | Frequency stabilization control device of electric power system |
-
2020
- 2020-08-19 CN CN202010838016.5A patent/CN112147977B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015131602A1 (en) * | 2014-03-04 | 2015-09-11 | 国家电网公司 | Method for coordinating and controlling multi-terminal flexible direct current transmission system |
| US20170025978A1 (en) * | 2015-05-07 | 2017-01-26 | State Grid Zhejiang Electric Power Research Institute | Low-Frequency Band Suppression Enhanced Anti-Reversal Power System Stabilizer |
| CN105391050A (en) * | 2015-10-28 | 2016-03-09 | 南方电网科学研究院有限责任公司 | Checking method and system for high-cycle cutting machine configuration scheme |
| CN105305450A (en) * | 2015-12-02 | 2016-02-03 | 中国电力科学研究院 | Power grid AC/DC cooperation control method after direct current block fault |
| CN105515035A (en) * | 2015-12-14 | 2016-04-20 | 国家电网公司 | Control method of back-to-back DC power transmission system accessed to weak AC system |
| CN108736500A (en) * | 2017-04-25 | 2018-11-02 | 中国电力科学研究院 | Machine method and apparatus are cut in the optimization of regional power grid affluence electric power direct current delivery system |
| CN107732953A (en) * | 2017-11-02 | 2018-02-23 | 国网山西省电力公司电力科学研究院 | Machine order determination method is cut after the direct current locking of a kind of considering security and efficiency |
| CN107994619A (en) * | 2017-11-27 | 2018-05-04 | 中国电力科学研究院有限公司 | A kind of Multi-infeed HVDC transmission system start-up mode optimization method and system |
| CN108683206A (en) * | 2018-04-27 | 2018-10-19 | 南方电网科学研究院有限责任公司 | Passive island locking control system and method for direct current transmission system |
| CN109873444A (en) * | 2019-04-15 | 2019-06-11 | 南京南瑞继保电气有限公司 | Two-loop direct current power transmission system master control system and configuration method |
| CN210041339U (en) * | 2019-05-27 | 2020-02-07 | 南方电网科学研究院有限责任公司 | Frequency stabilization control device of electric power system |
Non-Patent Citations (1)
| Title |
|---|
| 李琳;许霖;杜磊;陈天华;: "基于调度主站策略的稳控远方闭锁备自投研究", 湖南电力, no. 06, pages 68 - 73 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112865074A (en) * | 2021-01-11 | 2021-05-28 | 南方电网科学研究院有限责任公司 | Load shedding method and device for stable control device for direct current power rapid reduction and terminal equipment |
| CN112865074B (en) * | 2021-01-11 | 2023-02-28 | 南方电网科学研究院有限责任公司 | Load shedding method and device for stable control device for direct current power rapid reduction and terminal equipment |
| CN113626298A (en) * | 2021-07-01 | 2021-11-09 | 南方电网科学研究院有限责任公司 | Multi-terminal direct current limiting online recovery function test method, system, equipment and medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112147977B (en) | 2023-09-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106571688B (en) | DC system operation mode and method for monitoring operation state of isolating switch | |
| CN111830846A (en) | Power distribution network fault testing method and system based on simulation testing platform | |
| CN112147977A (en) | High-fidelity transmission test method for stability control system of direct-current power transmission system | |
| CN102788915B (en) | Feeder automation online simulation method based on maintenance workstation | |
| CN113364120B (en) | Method, device and equipment for checking control process of intelligent substation and storage medium | |
| CN105896490B (en) | A kind of fault handling method and device of power distribution network | |
| CN108879755A (en) | The method and system of stability control device identification extra-high voltage DC transmission system power loss amount | |
| CN111525495A (en) | Relay protection fixed value online checking method and system and computer storage medium | |
| CN107367701B (en) | Electrical fault simulation method for alternating current charging pile | |
| CN110265998B (en) | Method and device for checking strategy fixed value of stability control system | |
| CN109149534B (en) | Method for rapidly diagnosing topological fault of power grid model based on DTS virtual switch | |
| CN110470928B (en) | Online detection method for substation/distribution automation system | |
| CN102611085B (en) | Intertripping simulation analysis method | |
| CN115940409A (en) | Full-period fault diagnosis method and device for safety control system function test command | |
| CN113534770B (en) | Test system for control device of direct current transmission system | |
| Cirio et al. | On‐line dynamic security assessment to mitigate the risk of blackout in the Italian power system | |
| CN106908675B (en) | System and method for detecting influence of power supply interruption on operation of nuclear power plant | |
| CN104636607A (en) | Evaluation method for refinery enterprise electric network static security features based on BPA | |
| CN112180295A (en) | Intelligent substation test system | |
| CN103576037B (en) | Based on the method for testing of hydrogenerator microcomputer protecting device intelligence test platform | |
| Wu et al. | Method for Peration Control Obstacle location and Fault Prediction of Substation Based on Information Driven | |
| CN110470938B (en) | Online detection method for substation/distribution automation system | |
| CN116775224B (en) | One-key sequential control testing system and testing method | |
| CN114137408B (en) | Method and device for testing effectiveness of over-limit tripping function of black module number of valve control system | |
| De Arriba et al. | Implementation of a system integrity protection scheme in the channel islands |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |