CN113219278B - New energy station primary frequency modulation test system and method - Google Patents

Abstract

The invention discloses a new energy station primary frequency modulation test system and method, the analog output source is used to simulate the current and voltage output of the grid-connected point, and trigger the action of the primary frequency modulation device; the integrated acquisition of the message and wave recording The device is used to collect network messages and fault recordings of grid-connected points; the simulated master station is used to load the primary frequency modulation online monitoring information model, and the simulated master station uses IEC104 or IEC61850 MMS to exchange information with the primary frequency modulation device, and initiates remote control and remote adjustment commands to record remote signaling and telemetry information in real time; the communication server is used to load the primary frequency modulation information point table, and simulate the new energy station to exchange information with the primary frequency modulation device through IEC104, Modbus TCP or IEC61850 GOOSE, passive Responding to the adjustment instruction initiated by the primary frequency modulation device and feeding back the target value; the test interface terminal is used to call the interface of the function module according to the test item of the primary frequency modulation device, return the test record data, and automatically generate the test report. The invention is used for laboratory testing and on-site testing, the testing method is flexible and convenient, and the testing result is reliable.

Description

New energy station primary frequency modulation test system and method

technical field

The invention relates to a new energy station primary frequency modulation testing system and method, belonging to the technical field of electric power system automation.

Background technique

With the continuous expansion of the installed capacity of new energy and the continuous increase of incoming electricity from outside the region, the power system is facing structural difficulties such as the decrease of moment of inertia and difficulty in frequency control, and the security of the power system is facing serious threats. In order to prevent a sudden large power shortage in the power grid and cause a low-frequency load shedding action, causing a large-scale power outage, and to ensure the safe and stable operation of the power grid, a requirement for the deployment of a frequency regulation function for new energy stations is put forward.

At present, the standards and regulations put forward requirements for the primary frequency modulation function and performance of new energy stations, but there is no good testing technology for the primary frequency modulation test. In the current technology, for a frequency modulation test, some functional tests are carried out with the help of a general-purpose electrical tester. The workload of manual configuration is heavy and the degree of automation is low. Some test items cannot be carried out due to limited test equipment, and there is a lack of a complete set of new energy station primary frequency modulation. Test system solutions.

Contents of the invention

Purpose: In order to overcome the deficiencies in the prior art, the present invention provides a new energy station primary frequency modulation testing system and method.

Technical solution: In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is:

A primary frequency modulation test system for a new energy station, including the following modules: an analog output source, an integrated acquisition device for message and wave recording, an analog master station, a communication server end, and a test interface end;

The analog output source is used to simulate the current and voltage output of the grid-connected point, and trigger the action of the frequency modulation device once.

The message and wave recording integrated acquisition device is used to collect network messages and fault recorders of grid-connected points.

The simulated master station is used to load the primary frequency modulation online monitoring information model. The simulated master station uses IEC104 or IEC61850 MMS to exchange information with the primary frequency modulation device, actively initiates remote control and remote modulation commands, and records remote signaling and telemetry information in real time.

The communication server is used to load the primary frequency modulation information point table, simulate the new energy station to exchange information with the primary frequency modulation device through IEC104, ModbusTCP or IEC61850 GOOSE, passively respond to the adjustment instruction initiated by the primary frequency modulation device and feedback the target value.

The test interaction interface end is used to call the interface of the function module of the analog output source, message and wave recording integrated acquisition device, analog master station, and communication server according to a frequency modulation device test item, return the test record data, and automatically generate testing report.

As a preferred solution, the analog output source has the functions of simulating frequency up-scrambling and down-scrambling processes, outputting sequence status, applying non-harmonic and harmonic analog sources, and playing back real fault waveforms.

As a preferred solution, the integrated acquisition device for message and wave recording automatically parses the information and extracts the time stamp, tests the response time performance index of the frequency modulation device once, has the time synchronization function, collects the current and voltage of the grid-connected point to calculate the active power and frequency, and records the frequency change Absolute time stamp; collect network messages through the mirror port of the switch, automatically parse the messages and extract time stamps according to the configuration information point table; automatically calculate the time difference between the frequency change moment and the power adjustment output according to the project configuration information.

As a preferred solution, the new energy site is set as a wind energy management system or a photovoltaic inverter.

As a preferred solution, the integrated acquisition device for message and wave recording adopts a portable device.

A method for a frequency modulation test of a new energy station, comprising the following steps:

Step 1. Call the analog output source interface to output current and voltage, and trigger the information change of the communication server, check the frequency modulation online monitoring information at the analog master station, and obtain the test result;

Step 2. Call the analog output source interface to output the sequence change frequency, record the receiving frequency at the analog master station, and compare the accuracy of the receiving frequency and the triggering frequency to obtain the test result;

Step 3: Call the analog output source interface to output the preset frequency value, record a frequency modulation simulation frequency and a frequency modulation simulation load command in the simulation master station, compare the calculated values based on the droop curve, and obtain the test results;

Step 4. Trigger the simulation master station to issue a frequency modulation entry test command, and issue the simulation frequency, frequency modulation increase/decrease load and characteristic parameter test commands respectively, and record the feedback value in real time to form a test record;

Step 5. Trigger the analog master station to issue an AGC adjustment command, and call the analog output source interface to output the preset frequency value, record the power adjustment target value on the communication server, and form a test record according to the AGC coordination strategy;

Step 6. Call the analog output source interface to output the preset high and low breakdown voltage values or the real short-circuit fault waveform, and record a frequency modulation related signal value at the analog master station to form the test result;

Step 7. Call the analog output source interface to output the preset lower than x% rated power and the frequency of a frequency modulation action, and record a frequency modulation related signal at the analog master station to form a test result; x% is the adjustment threshold;

Step 8: Automatically form a test report according to the test records corresponding to the above tests.

As a preferred solution, the primary frequency modulation online monitoring information includes remote signaling and telemetry signals.

As a preferred solution, the adjustment threshold is set to 20%.

Beneficial effects: The primary frequency modulation test system and method of the new energy station provided by the present invention can test the primary frequency regulation function of the new energy station, which can be used for laboratory testing and on-site testing. The testing method is flexible and convenient, and the test result is reliable.

Description of drawings

Fig. 1 is the framework schematic diagram of the test system that the present invention is applicable to wind farm;

Fig. 2 is a schematic diagram of the structure of the test system applicable to photovoltaic power plants according to the present invention.

Detailed ways

The present invention will be further described below in conjunction with specific examples.

The invention provides a primary frequency modulation test system for new energy stations, including: an analog output source, an integrated acquisition device for message and wave recording, an analog master station, a communication server end, and a test interaction interface end. The specific functions are as follows:

The analog output source is used to simulate the current and voltage output of the grid-connected point, and trigger the action of a frequency modulation device. It has the ability to simulate the process of frequency up-scrambling and down-scrambling, output sequence status, apply non-harmonic and harmonic analog sources, and playback real fault waveforms, etc. Function.

The integrated acquisition device of message and wave recording is used to collect network messages and fault recording of grid-connected points, automatically analyze information to extract time stamps, and test the response time performance index of a frequency modulation device. It adopts a portable device with time synchronization function, and collects Calculate the active power and frequency of the current and voltage of the grid-connected point, and record the absolute time stamp of the frequency change moment; collect network messages through the mirror port of the switch, automatically analyze the message and extract the time stamp according to the configuration information point table; automatically calculate the frequency change according to the project configuration information Time difference from moment to power regulation output.

The analog master station is used to load the primary frequency modulation online monitoring information model. The analog master station uses IEC104 or IEC61850MMS to exchange information with the primary frequency modulation device, actively initiates remote control and remote adjustment commands, and records remote signaling and telemetry information in real time.

The communication server is used to load the primary frequency regulation information point table, simulate the wind energy management system or photovoltaic inverter (PCS) to exchange information with the primary frequency regulation device through IEC104, Modbus TCP or IEC61850 GOOSE, and passively respond to the adjustment instructions initiated by the primary frequency regulation device And feedback the target value.

The test interaction interface end is used to call the interface of the function module of the analog output source, message and wave recording integrated acquisition device, analog master station, and communication server according to a frequency modulation device test item, return test record data, and automatically generate test reports . Provide a visual human-computer interaction interface.

Based on the above system, the present invention provides a method for a frequency modulation test of a new energy station, including the following steps:

Step 1. Realize a frequency modulation device signal check, call the analog output source interface to output current and voltage, and trigger the information change of the communication server, and check the frequency modulation online monitoring information at the analog master station, including remote signaling and telemetry signals;

Step 2. Realize a frequency accuracy test of the frequency modulation device, call the analog output source interface to output the sequence change frequency, record the receiving frequency at the analog master station, and compare the accuracy of the receiving frequency and the trigger frequency;

Step 3. Realize a frequency modulation function test of a frequency modulation device, call the analog output source interface to output the preset frequency value, record the frequency modulation simulation frequency and the frequency modulation simulation load command at the simulation master station, and compare the calculated values according to the droop curve. get test results;

Step 4: Realize the online monitoring of the primary frequency modulation of the primary frequency modulation device, trigger the simulated master station to issue a frequency modulation entry test command, and issue commands such as simulated frequency, primary frequency modulation increase/decrease load and characteristic parameter test, and record the feedback value in real time. Test Record;

Step 5. Realize an AGC coordination control test of the frequency modulation device, trigger the analog master station to issue an AGC adjustment command, and call the analog output source interface to output the preset frequency value, record the power adjustment target value on the communication server, and coordinate according to the AGC Strategy formation test records;

Step 6. Realize an anti-clump test of the frequency modulation device, call the analog output source interface to output preset high and low voltage values or real short-circuit fault waveforms, and record a frequency modulation-related signal value at the analog master station to form a test result;

Step 7. Realize the primary frequency modulation function blocking test of the primary frequency modulation device, call the analog output source interface to output the preset lower than 20% rated power and primary frequency modulation action frequency, and record the primary frequency modulation related signals at the analog master station to form the test result;

Step 8: Automatically form a test report according to the test records corresponding to the above tests.

Example:

As shown in Figure 1-2, the primary frequency modulation devices of the wind turbines and photovoltaic units in the new energy field are tested respectively. When in use, the primary frequency modulation test system of the new energy field and the primary frequency modulation test system of the new energy field are built. The output current and voltage are controlled by hard wiring to connect with the primary frequency modulation device, and the network information exchange is realized by connecting with the primary frequency modulation device through the network cable. And carry out various test items of the frequency modulation device.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also possible. It should be regarded as the protection scope of the present invention.

Claims (7)

1. A test method for a primary frequency modulation test system of a new energy station, characterized in that: the primary frequency modulation test system of a new energy station includes the following modules: an analog output source, a message and wave recording integrated acquisition device, Simulate the master station, communication server and test interface; The analog output source is used to simulate the current and voltage output of the grid-connected point, and trigger an action of the frequency modulation device; The message and wave recording integrated acquisition device is used to collect network messages and fault recorders of grid-connected points; The simulated master station is used to load a primary frequency modulation online monitoring information model, and the simulated master station uses IEC104 or IEC61850MMS to perform information interaction with the primary frequency modulation device, actively initiate remote control and remote modulation commands, and record remote signaling and telemetry information in real time; The communication server is used to load the primary frequency modulation information point table, simulate the new energy station to exchange information with the primary frequency modulation device through IEC104, Modbus TCP or IEC61850 GOOSE, passively respond to the adjustment instruction initiated by the primary frequency modulation device and feed back the target value; The test interaction interface end is used to call the interface of the function module of the analog output source, message and wave recording integrated acquisition device, analog master station, and communication server according to a frequency modulation device test item, return the test record data, and automatically generate testing report; Described test method, comprises the following steps: Step 1. Call the analog output source interface to output current and voltage, and trigger the information change of the communication server, check the frequency modulation online monitoring information at the analog master station, and obtain the test result; Step 2. Call the analog output source interface to output the sequence change frequency, record the receiving frequency at the analog master station, and compare the accuracy of the receiving frequency and the triggering frequency to obtain the test result; Step 3: Call the analog output source interface to output the preset frequency value, record a frequency modulation simulation frequency and a frequency modulation simulation load command in the simulation master station, compare the calculated values based on the droop curve, and obtain the test results; Step 4. Trigger the simulation master station to issue a frequency modulation entry test command, and issue the simulation frequency, frequency modulation increase/decrease load and characteristic parameter test commands respectively, and record the feedback value in real time to form a test record; Step 5. Trigger the analog master station to issue an AGC adjustment command, and call the analog output source interface to output the preset frequency value, record the power adjustment target value on the communication server, and form a test record according to the AGC coordination strategy; Step 6. Call the analog output source interface to output the preset high and low breakdown voltage values or the real short-circuit fault waveform, and record a frequency modulation related signal value at the analog master station to form the test result; Step 7. Call the analog output source interface to output the preset lower than x% rated power and the frequency of a frequency modulation action, and record a frequency modulation related signal at the analog master station to form a test result; x% is the adjustment threshold; Step 8: Automatically form a test report according to the test records corresponding to the above tests. 2. The testing method according to claim 1, characterized in that: said primary frequency modulation online monitoring information includes remote signaling and telemetry signals. 3. The testing method according to claim 1, characterized in that: the adjustment threshold is set to 20%. 4. The test method according to claim 1, characterized in that: the analog output source has analog frequency up-scrambling and down-scrambling processes, output sequence status, applying harmonic-free and harmonic analog sources, and playing back real fault waveforms Function. 5. The testing method according to claim 1, characterized in that: said message and wave recording integrated acquisition device automatically parses the information to extract the time stamp, tests the response time performance index of the frequency modulation device once, possesses time synchronization function, collects and Calculate the active power and frequency of the network point current and voltage, record the absolute time stamp of the frequency change moment; collect network messages through the mirror port of the switch, automatically analyze the message and extract the time stamp according to the configuration information point table; automatically calculate the frequency change time according to the project configuration information Time difference to power regulation output. 6. The testing method according to claim 1, characterized in that: the new energy site is set as a wind energy management system or a photovoltaic inverter. 7. The testing method according to claim 1, characterized in that: the integrated acquisition device for message and wave recording adopts a portable device.

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